WO2017125049A1 - 前导码发送、接收方法、装置、用户设备及基站 - Google Patents

前导码发送、接收方法、装置、用户设备及基站 Download PDF

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Publication number
WO2017125049A1
WO2017125049A1 PCT/CN2017/071752 CN2017071752W WO2017125049A1 WO 2017125049 A1 WO2017125049 A1 WO 2017125049A1 CN 2017071752 W CN2017071752 W CN 2017071752W WO 2017125049 A1 WO2017125049 A1 WO 2017125049A1
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Prior art keywords
time domain
frequency domain
preamble
resource
message
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PCT/CN2017/071752
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English (en)
French (fr)
Inventor
杨玲
苟伟
赵亚军
毕峰
Original Assignee
中兴通讯股份有限公司
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Priority to EP17741080.0A priority Critical patent/EP3407662A4/en
Publication of WO2017125049A1 publication Critical patent/WO2017125049A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance

Definitions

  • the present invention relates to the field of communications, and in particular, to a preamble transmission, reception, random access processing method, apparatus, user equipment, and base station.
  • the unlicensed spectrum has the characteristics that the unlicensed spectrum does not need to be purchased, the spectrum resource has zero cost, and has the characteristics of free/low cost; the individual and the enterprise can participate in the deployment, and the equipment of the equipment vendor can be deployed arbitrarily, and the access requirement is low. Low cost; 5GHz, 2.4GHz and other frequency bands in the unlicensed spectrum can be used, with features of large available bandwidth; unlicensed carriers have the characteristics of shared resources, that is, when multiple different systems are operating or the same system When different operators operate in it, they can consider some ways of sharing resources to improve spectrum utilization efficiency, and so on.
  • the Rel-13 version of the LTE system began research in September 2014.
  • One of the important research topics is the carrier work of the LTE system using unlicensed spectrum. This technology will enable the LTE system to use the carriers of the existing unlicensed spectrum, greatly increasing the potential spectrum resources of the LTE system, enabling the LTE system to obtain lower spectrum costs.
  • random access is a basic function.
  • the UE can only be scheduled by the system for uplink transmission after being synchronized with the uplink of the system through the random access procedure.
  • Random access in LTE is divided into two types: contention based random access and non-contention based random access.
  • the contention-based random access process can be divided into four steps:
  • the UE transmits a Preamble, and the UE randomly selects an available Preamble for transmission.
  • the eNB sends a random access response (RAR).
  • RAR random access response
  • the base station detects the Preamble preamble sequence sent by the UE, it sends a response (the detected Preamble preamble sequence index for the uplink synchronization time adjustment information) on the Downlink Synchronization Channel (DL-SCH).
  • the initial uplink resource allocation for transmitting the Msg3 message
  • TC-RNTI Temporary Cell Radio Network Tempory Identity
  • C-RNTI The UE needs to use a random access radio network temporary identifier RA-RNTI (Random Access RNTI) on the PDCCH to listen for RAR messages.
  • RA-RNTI Random Access RNTI
  • the UE sends an Msg3 message.
  • the UE receives the RAR message and obtains uplink time synchronization and uplink resources. However, at this time, it is not determined that the RAR message is sent to the UE itself rather than to other UEs. Due to the preamble of the UE Columns are randomly selected from public sources. Therefore, there is a possibility that different UEs transmit the same access preamble sequence on the same time-frequency resource, so that they receive the same RAR through the same RA-RNTI. Moreover, the UE also has no way of knowing if other UEs are using the same resources for random access. To this end, the UE needs to resolve such random access collisions through subsequent Msg3 messages and Msg4 message messages.
  • the eNB sends an Msg4 message, that is, a conflict resolution message. If the UE receives the Msg4 message returned by the eNB in the time of the media access control-collision resolution timer (mac-ContentionResolutionTimer), and the UE ID carried in the Msg3 message is reported to the eNB in the Msg3 message, the UE considers that I won this random access collision and the random access was successful.
  • the TC-RNTI obtained in the RAR message is set as its own C-RNTI. Otherwise, the UE considers that the access fails and performs the retransmission process of random access according to the rules described above.
  • the Preamble sent by the UE is notified by the eNB, and the uplink synchronization is completed through the first two steps, and the conflict resolution process is not performed.
  • the present invention provides a method for transmitting and receiving a preamble, a user equipment, and a base station, to at least solve the problem that the random access procedure cannot be performed on an unlicensed carrier in the related art.
  • a preamble transmission method including: determining a time domain and/or a frequency domain resource for transmitting a preamble; transmitting the determined time domain and/or frequency domain resource Said preamble.
  • transmitting the preamble on the determined time domain and/or frequency domain resources comprises transmitting the preamble on the time domain and/or frequency domain resources by short control signaling SCS.
  • determining the time domain and/or frequency domain resources for transmitting the preamble comprises at least one of: determining the time domain for transmitting the preamble and/or according to a predefined manner a frequency domain resource; determining, according to the physical layer downlink control information DCI signaling, the time domain and/or frequency domain resource used for sending the preamble; determining, according to the high layer radio resource control RRC signaling, sending the preamble The time domain and/or frequency domain resource of the code; determining the time domain and/or frequency domain for transmitting the preamble according to an execution result of the LBT mechanism and/or the idle channel evaluation CCA detection Resources.
  • determining the time domain and/or frequency domain resource for transmitting the preamble comprises one of: following the performing the LBT mechanism and/or the execution result of the CCA detection The result is that, in the case that the LBT mechanism and/or the CCA detection is successful before the first predetermined time domain and/or the frequency domain resource, the first predetermined time domain and/or frequency domain resource is determined to be used for sending.
  • the time domain and/or frequency domain resource of the preamble if the execution result is that the LBT mechanism and/or the CCA detection fails before the first predetermined time domain and/or frequency domain resource And continuing to perform the LBT mechanism and/or CCA detection, where the LBT and/or CCA detection is successful, determining a neighboring time domain and/or a frequency domain after the LBT and/or CCA detection success time
  • the resource is the time domain and/or frequency domain resource for transmitting the preamble; performing the LBT mechanism and/or before the execution result is before the first predetermined time domain and/or frequency domain resource
  • the second after the first predetermined time domain and/or the frequency domain resource Scheduled time domain and/or frequency domain Performing the LBT mechanism and/or the CCA detection before the source, and performing the LBT mechanism and/or the CCA detection succeeds before the second predetermined time domain and/or frequency domain resource, determining the location
  • the second predetermined time domain and/or frequency domain resource is the time domain and/or frequency domain resource
  • the first predetermined time domain and/or frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the area before the frequency domain resource include the following One of the first predetermined time domain and/or frequency domain resource or the special subframe before the second predetermined time domain and/or frequency domain resource or before the third predetermined time domain and/or frequency domain resource And the first predetermined time domain and/or the frequency domain resource or the uplink subframe before the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and/or the frequency domain resource; Preamble sub-frames of the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and/or the frequency domain resource.
  • the area before the first predetermined time domain and/or frequency domain resource or the second predetermined time domain and/or frequency domain resource or before the third predetermined time domain and/or frequency domain resource is In the case of the special subframe, the area for performing the LBT mechanism and/or the CCA detection includes at least one of: in the first predetermined time domain and/or frequency domain resource or the second For performing the LBT before the predetermined time domain and/or the frequency domain resource or the region before the third predetermined time domain and/or the frequency domain resource is the uplink pilot time slot UpPTS of the special subframe
  • the mechanism and/or the area detected by the CCA includes at least one of: partial/all UpPTS; partial/all guard slots GP and/or UpPTS; part/all DwPTS and/or GP and/or UpPTS; in downlink subframe Last k symbols and/or DwPTS and / or GP and / or UpPTS; partial / full UpPTS and / or partial / full CP time; part / all
  • the area before the first predetermined time domain and/or frequency domain resource or the second predetermined time domain and/or frequency domain resource or before the third predetermined time domain and/or frequency domain resource is In the case of the uplink subframe, the area for performing the LBT mechanism and/or the CCA detection includes at least one of: in the first predetermined time domain and/or frequency domain resource or the second An area before the predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource is an uplink subframe, and the first predetermined time domain and/or frequency domain resource or the first For performing the LBT mechanism and in the case where the predetermined time domain and/or the frequency domain resource or the previous subframe of the third predetermined time domain and/or the frequency domain resource has a physical random access channel PRACH channel And/or the area detected by the CCA includes at least one of: part/all GT time of the PRACH of the previous subframe; part/all GT time of the PRACH of the previous subframe and/or the first Predetermining a time domain
  • said first predetermined time domain and/or frequency domain resource, said second predetermined time domain and/or frequency domain resource, said third predetermined time domain and/or frequency domain resource, LBT/CCA or CP Or at least one of a starting position or a duration or an ending position of the GT or the PRACH resource is determined by at least one of the following manners: a manner of determining by the base station for the user equipment UE; determining by means of physical layer signaling; Determining the manner of the high-level signaling notification; determining by the manner in which the base station negotiates with the UE; determining by the manner that the system is pre-configured by the UE.
  • the multiple neighboring time domain and/or frequency domain resources are time domain and/or frequency domain resources that are consecutive in the time domain, Or discrete time domain and/or frequency domain resources in the time domain; and/or, in the case where the second predetermined time domain and/or frequency domain resources are multiple, the plurality of second time domains and/or Or the frequency domain resource is a time domain and/or frequency domain resource that is continuous in the time domain, or a time domain and/or frequency domain resource that is discrete in the time domain; and/or includes multiple numbers in the time window
  • the plurality of third time domain and/or frequency domain resources are consecutive time domain and/or frequency domain resources in the time domain, or discrete time domain sums in the time domain. / or frequency domain resources.
  • the resource is a time domain and/or a frequency domain resource that is discrete in the time domain, including one of the following: a time domain and/or a frequency domain resource that are equally spaced in the time domain and have different resource block sizes; an equal interval and a resource block in the time domain Time domain and/or frequency domain resources of the same size; time domain and/or frequency domain resources with unequal intervals and resource block sizes in the time domain; time domains of different time zones and the same resource block size and/or Or frequency domain resources.
  • the first predetermined time domain and/or frequency domain resource is K subframes in the time domain, or N OFDM symbols, where K, N is an integer greater than or equal to 1.
  • the time window may be located after the first predetermined time domain and/or frequency domain resource, or before the first predetermined time domain and/or frequency domain resource, or include the first predetermined Time domain and / or frequency domain resources.
  • the third predetermined time domain and/or frequency domain resource in the time window is determined by: identifying the first predetermined time domain and/or frequency domain resource and the start of the time window. a first offset of the offset distance; an offset distance between the third predetermined time domain and/or frequency domain resource for transmitting the preamble in the time window and the start of the time window a second offset; a size of the third predetermined time domain and/or frequency domain resource; a number of the third predetermined time domain and/or frequency domain resource; a window length of the time window; The interval between three predetermined time domain and/or frequency domain resources.
  • transmitting the preamble on the determined time domain and/or frequency domain resource comprises: determining, according to the determined time domain and/or frequency domain resource, part or all content for transmitting the Msg3 message. Fourth predetermined time domain and/or frequency domain resource; Transmitting the preamble on the determined time domain and/or frequency domain resource, and transmitting part or all of the content of the Msg3 message on the determined fourth predetermined time domain and/or frequency domain resource.
  • the fourth predetermined time domain and/or frequency domain resource comprises at least one of: the same time domain and/or frequency domain resource in the time domain, offset by a third offset in the frequency domain Time domain and/or frequency domain resources; offset from the time domain and/or frequency domain resources by a fourth offset in the time domain, the same time domain and/or frequency domain resources in the frequency domain.
  • a preamble receiving method including: receiving a preamble transmitted by a user equipment UE on a time domain and/or a frequency domain resource; performing, on the UE according to the received preamble Random access processing.
  • receiving the preamble sent by the UE on the time domain and/or the frequency domain resource comprises: receiving the UE by using a short control signaling SCS, on the time domain and/or frequency domain resource.
  • the preamble sent comprises: receiving the UE by using a short control signaling SCS, on the time domain and/or frequency domain resource.
  • performing random access processing on the UE according to the received preamble comprises: receiving part or all of the content of the Msg3 message on a fourth predetermined time domain and/or frequency domain resource, where
  • the fourth predetermined time domain and/or frequency domain resource includes at least one of the following: the same time domain and/or frequency domain resource in the time domain, offsetting the time domain of the third offset in the frequency domain and/or Or a frequency domain resource; offsetting the fourth offset from the time domain and/or the frequency domain resource in the time domain, and the same time domain and/or frequency domain resource in the frequency domain.
  • the method before receiving the preamble sent by the UE on the time domain and/or the frequency domain resource, the method further includes: sending, to the UE, the determining the time domain and/or the frequency domain resource and / or the fourth time domain and / or frequency domain resources and / or the instructions of the preamble.
  • a random access method including: acquiring a right to use a carrier; performing random access processing according to a carrier that obtains a usage right.
  • performing random access processing according to the obtained carrier includes: transmitting an Msg_1 message to the base station on the carrier, where the Msg_1 message includes an Msg1 message carrying a preamble for performing random access and/or a partial Msg3 message carrying a part of the content of the Msg3 message; receiving a first response message sent by the base station according to the Msg_1 message; sending, according to the first response message, the Msg3 message carrying the Msg3 message according to the first response message a remaining Msg3 message of the remaining content except the partial content; receiving an Msg4 message sent by the base station according to the remaining Msg3 message; determining, according to the Msg4 message, whether random access is performed on the carrier; or Sending an Msg_M message to the base station on the carrier, where the Msg_M message includes an Msg1 message carrying a preamble for performing random access and/or an Msg3 message carrying all contents of the Msg3 message;
  • the time domain and/or frequency domain resource used to send the Msg1 message is the same as or different from the time domain and/or frequency domain resource used to send the partial Msg3 message; or, for sending the Msg1 message
  • the time domain and/or frequency domain resources are the same or different from the time domain and/or frequency domain resources used to transmit the Msg3 message.
  • part of the content of the Msg3 message includes at least one of the following: a user equipment identifier UE ID, a cell radio network temporary identifier C-RNTI, a radio resource control RRC request, a scheduling request SR, and a buffer status report BSR.
  • the transmitting the partial Msg3 message and/or the Msg3 message further comprises: adopting a first temporary cell radio for a transmission channel and/or a control channel for transmitting the partial Msg3 message and/or the Msg3 message
  • the network temporary identifier TC-RNTI is scrambled.
  • the TC-RNTI is obtained by at least one of the following correspondences: a correspondence between the TC-RNTI and the preamble, a correspondence between the TC-RNTI and the UE ID, a TC-RNTI and a preamble and a UE ID
  • the TC-RNTI is obtained by at least one of the following manners: the method is obtained by the base station and the UE, and is obtained by means of the notification by the base station or configured by the UE, and is obtained by means of high-level signaling notification. Obtained by means of physical layer signaling, and obtained by means of media access control MAC layer signaling.
  • the first response message carries at least one of the following information: a second TC-RNTI, an uplink grant information, a preamble index, a C-RNTI, and a timing advance TA.
  • the sending the remaining Msg3 message further includes: scrambling the first TC-RNTI or the second TC-RNTI by using the first TC-RNTI or the second TC-RNTI for transmitting a transport channel and/or a control channel of the remaining Msg3 message.
  • a random access method including: determining an unlicensed carrier that a user equipment UE contends; performing random access processing of the UE according to the determined unlicensed carrier.
  • performing the random access processing of the UE according to the determined unlicensed carrier comprises: receiving, by the UE, a Msg_1 message on the unlicensed carrier, where the Msg_1 message includes a preamble carrying random access. a Msg1 message of the code and/or a partial Msg3 message carrying part of the content of the Msg3 message; sending a first response message to the UE based on the Msg_1 message; receiving a bearer sent by the UE according to the first response message Deleting a remaining Msg3 message of the remaining content of the Msg3 message except the part of the content; sending an Msg4 message to the UE according to the remaining Msg3 message, wherein the Msg4 message is used by the UE to determine that the unauthorized Whether the random access is successfully performed on the carrier; or, the Msg_M message sent by the UE is received on the unlicensed carrier, where the Msg_M message includes an Msg1 message carrying
  • the sending the first response message to the UE according to the Msg_1 message includes: sending the first response message to the UE on an authorized carrier; or performing an LBT on the unlicensed carrier after performing the first listening
  • the mechanism and/or the idle channel evaluates the CCA detection and transmits the first response message on the time domain and/or frequency domain resources that are contending after performing the LBT mechanism and/or the CCA detection succeeds.
  • the method further includes: using the first temporary cell radio network temporary identifier TC-RNTI to solve the partial Msg3 message and/or the Msg3 message. Disturb.
  • the first response message carries the second TC-RNTI, and the remaining Msg3 message is received, the first TC-RNTI or the The second TC-RNTI performs descrambling.
  • a preamble transmitting apparatus including: a first determining module, configured to be A time domain and/or a frequency domain resource for transmitting a preamble; the first transmitting module configured to transmit the preamble on the determined time domain and/or frequency domain resource.
  • the first sending module comprises: a first sending unit, configured to send the preamble on the time domain and/or frequency domain resource by short control signaling SCS.
  • the first determining module comprises a first determining unit, the first determining unit is configured to perform at least one of: determining the time domain and the transmitting the preamble according to a predefined manner And the frequency domain resource; determining, according to the physical layer downlink control information DCI signaling, the time domain and/or the frequency domain resource used for sending the preamble; determining, according to the high layer radio resource control RRC signaling, Determining the time domain and/or frequency domain resources of the preamble; determining the time domain sum for transmitting the preamble according to an execution result of the LBT mechanism and/or the idle channel evaluation CCA detection / or frequency domain resources.
  • the first determining unit when determining the time domain and/or frequency domain resource for transmitting the preamble according to the execution result of the LBT mechanism and/or the CCA detection, includes the following a first determining subunit, configured to determine, in a case that the execution result is that the LBT mechanism is performed before the first predetermined time domain and/or the frequency domain resource, and/or the CCA detection is successful a predetermined time domain and/or frequency domain resource is the time domain and/or frequency domain resource for transmitting the preamble; and a second determining subunit is set to be in the first predetermined time domain when the execution result is And performing the LBT mechanism and/or CCA detection in the case where the LBT mechanism and/or the CCA detection fails before the frequency domain resource is executed, in the case that the LBT and/or CCA detection is successful.
  • the third determining subunit Setting In order to perform the execution in the first predetermined time domain and/or frequency domain resources
  • the LBT mechanism and the second predetermined time domain and/or frequency domain resources are performed before the first predetermined time domain and/or the frequency domain resource.
  • the CCA detects, and in the case where the LBT mechanism and/or the CCA detection is successful before the second predetermined time domain and/or frequency domain resources, determining the second predetermined time domain and/or Or the frequency domain resource is the time domain and/or frequency domain resource used to send the preamble; and the fourth determining subunit is set to be in the first predetermined time domain and/or frequency in the execution result.
  • the LBT mechanism and/or the CCA detection fails before the domain resource is performed, the LBT mechanism and/or the CCA detection is performed within a time window for transmitting the preamble, and at the time Determining, in the case that the third predetermined time domain and/or the frequency domain resource in the window performs the LBT mechanism and/or the CCA detection is successful, determining that the third predetermined time domain and/or frequency domain resource is used for sending The time domain and/or frequency domain resources of the preamble.
  • the first sending module includes: a second determining unit, configured to determine, according to the determined time domain and/or frequency domain resources, a fourth predetermined time domain sum for transmitting part or all of the content of the Msg3 message And/or a frequency domain resource; the second transmitting unit, configured to transmit the preamble on the determined time domain and/or frequency domain resource, and the determined fourth predetermined time domain and/or frequency domain resource Sending part or all of the content of the Msg3 message.
  • a second determining unit configured to determine, according to the determined time domain and/or frequency domain resources, a fourth predetermined time domain sum for transmitting part or all of the content of the Msg3 message And/or a frequency domain resource
  • the second transmitting unit configured to transmit the preamble on the determined time domain and/or frequency domain resource, and the determined fourth predetermined time domain and/or frequency domain resource Sending part or all of the content of the Msg3 message.
  • a preamble receiving apparatus including: a first receiving module, configured to receive a preamble transmitted by a user equipment UE on a time domain and/or a frequency domain resource; and a first processing module, And configured to perform random access processing on the UE according to the received preamble.
  • the first receiving module includes: a first receiving unit, configured to receive the UE by using short control signaling SCS, the preamble transmitted on the time domain and/or frequency domain resources.
  • the first processing module comprises: a second receiving unit, configured to receive part or all of the content of the Msg3 message on a fourth predetermined time domain and/or frequency domain resource, wherein the fourth predetermined time
  • the domain and/or frequency domain resources include at least one of the following: a time domain and/or a frequency domain resource offset from the time domain and/or the frequency domain resource in the time domain, offset by a third offset in the frequency domain And offsetting the fourth offset from the time domain and/or the frequency domain resource in the time domain, and the same time domain and/or frequency domain resources in the frequency domain.
  • the apparatus further includes: a second sending module, configured to send, to the UE, the determining the time domain and/or frequency domain resource and/or the fourth time domain and/or frequency domain resource and/or Or the instruction of the preamble.
  • a second sending module configured to send, to the UE, the determining the time domain and/or frequency domain resource and/or the fourth time domain and/or frequency domain resource and/or Or the instruction of the preamble.
  • a random access device including: an obtaining module, configured to acquire a right to use a carrier; and a second processing module configured to perform random access processing according to a carrier that obtains a usage right.
  • the second processing module includes: a first processing unit, configured to send an Msg_1 message to the base station on the carrier, where the Msg_1 message includes an Msg1 message carrying a preamble for performing random access and/or Or a partial Msg3 message carrying a part of the content of the Msg3 message; receiving a first response message sent by the base station according to the Msg_1 message; sending, according to the first response message, the device carrying the Msg3 message according to the first response message a remaining Msg3 message of the remaining content except the partial content; receiving an Msg4 message sent by the base station according to the remaining Msg3 message; determining, according to the Msg4 message, whether the random access on the carrier is successful; or, second a processing unit, configured to send an Msg_M message to the base station on the carrier, where the Msg_M message includes an Msg1 message carrying a preamble for performing random access and/or an Msg3 message carrying all contents
  • the first processing unit is further configured to send the partial Msg3 message, and use a first temporary cell radio network temporary identifier TC-RNTI to perform scrambling on a transport channel and/or a control channel that sends the partial Msg3 message.
  • the second processing unit is further configured to: before transmitting the Msg3 message, use a first temporary cell radio network temporary identifier TC-RNTI to perform scrambling on a transport channel and/or a control channel that sends the Msg3 message. .
  • the first processing unit is further configured to send the remaining Msg3 message, and adopt the first TC-RNTI or the second to a transport channel and/or a control channel for sending the remaining Msg3 message.
  • the TC-RNTI is scrambled.
  • a random access apparatus including: a second determining module, configured to determine an unlicensed carrier that the user equipment UE contends; and a third processing module configured to determine the non-determined The authorized carrier performs random access processing of the UE.
  • the third processing module includes: a third processing unit, configured to receive, by the UE, an Msg_1 message on the unlicensed carrier, where the Msg_1 message includes a preamble carrying random access.
  • An Msg1 message and/or a partial Msg3 message carrying part of the content of the Msg3 message sending a first response message to the UE based on the Msg_1 message; and receiving, by the UE, the Msg3 carried according to the first response message a remaining Msg3 message of the remaining content of the message except the part of the content; sending an Msg4 message to the UE according to the remaining Msg3 message,
  • the Msg4 message is used by the UE to determine whether the random access is successfully performed on the unlicensed carrier; or the fourth processing unit is configured to receive the Msg_M message sent by the UE on the unlicensed carrier.
  • the Msg_M message includes an Msg1 message carrying a preamble for performing random access and/or an Msg3 message carrying all the contents of the Msg3 message; and sending a second response message to the UE according to the Msg_M message, where The second response message is used by the UE to determine whether random access is performed on the unlicensed carrier.
  • the third processing unit is further configured to: send the first response message to the UE on an authorized carrier; or perform an LBT mechanism and/or an idle channel assessment after performing listening on an unlicensed carrier.
  • the CCA detects and transmits the first response message on the time domain and/or frequency domain resources that are contending after performing the LBT mechanism and/or the CCA detection succeeds.
  • the third processing unit is further configured to: after receiving the partial Msg3 message, perform descrambling on the partial Msg3 message by using a first temporary cell radio network temporary identifier TC-RNTI; or
  • the fourth processing unit is further configured to: after receiving the Msg3 message, perform descrambling on the Msg3 message by using a first temporary cell radio network temporary identifier TC-RNTI.
  • the third processing unit is further configured to: when the first response message carries the second TC-RNTI, and receive the remaining Msg3 message, use the received remaining Msg3 message
  • the first TC-RNTI or the second TC-RNTI performs descrambling.
  • a user equipment UE comprising the preamble transmitting apparatus according to any one of the preceding claims, and/or the random access processing apparatus according to any one of the preceding claims.
  • a base station comprising the preamble receiving apparatus according to any one of the preceding claims, and/or the random access processing apparatus according to any one of the preceding claims
  • Another embodiment of the present invention provides a computer storage medium, where the computer storage medium stores execution instructions for performing one or a combination of the steps in the foregoing method embodiments.
  • the time domain and/or the frequency domain resource for transmitting the preamble is determined; the preamble is sent on the determined time domain and/or the frequency domain resource, and the random connection cannot be implemented in the related art. The problem of entering the process, and thus the effect of successful random access.
  • FIG. 1 is a flowchart of a preamble transmission method according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a random access method 1 according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a preamble receiving method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a random access method 2 according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of temporally consecutive PRACH resources in a time window for transmitting a Preamble code according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of PRACH resources in a time window for transmitting a Preamble code being equally spaced in time according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of adding PRACH spare resources between discrete PRACH resources in a time window according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of additionally adding PRACH time domain resources after a Preamble transmission window according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of performing an LBT mechanism and/or a CCA detection location when transmitting a Preamble code in Format 0 to 3 according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of performing an LBT mechanism and/or a CCA detection location when transmitting a Preamble code under Format 4 according to an embodiment of the present invention
  • FIG. 11 is a block diagram showing the structure of a preamble transmitting apparatus according to an embodiment of the present invention.
  • FIG. 12 is a block diagram 1 of a preferred structure of a first transmitting module 114 in a preamble transmitting apparatus according to an embodiment of the present invention
  • FIG. 13 is a block diagram showing a preferred structure of a first determining module 112 in a preamble transmitting apparatus according to an embodiment of the present invention
  • FIG. 14 is a block diagram showing a preferred structure of the first determining unit 132 in the first determining module 112 in the preamble transmitting apparatus according to the embodiment of the present invention
  • 15 is a block diagram 2 of a preferred structure of a first transmitting module 114 in a preamble transmitting apparatus according to an embodiment of the present invention
  • FIG. 16 is a structural block diagram of a preamble receiving apparatus according to an embodiment of the present invention.
  • 17 is a block diagram showing a preferred structure of a first receiving module 162 in a preamble receiving apparatus according to an embodiment of the present invention
  • FIG. 18 is a block diagram showing a preferred structure of a first processing module 164 in a preamble receiving apparatus according to an embodiment of the present invention.
  • FIG. 19 is a block diagram showing a preferred structure of a preamble receiving apparatus according to an embodiment of the present invention.
  • FIG. 20 is a structural block diagram of a random access device 1 according to an embodiment of the present invention.
  • FIG. 21 is a block diagram showing a preferred structure of a second processing module 204 in a random access device 1 according to an embodiment of the present invention.
  • FIG. 22 is a structural block diagram of a random access device 2 according to an embodiment of the present invention.
  • FIG. 23 is a block diagram showing a preferred structure of a third processing module 224 in the random access device 2 according to an embodiment of the present invention.
  • FIG. 24 is a structural block diagram of a user equipment UE according to an embodiment of the present invention.
  • FIG. 25 is a structural block diagram of a base station according to an embodiment of the present invention.
  • the terms “first”, “second” and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.
  • the scheme related to the "unlicensed carrier” involved in the embodiment of the present invention may also be applied to the authorized carrier. In some embodiments, the unlicensed carrier is taken as an example for description.
  • FIG. 1 is a flowchart of a preamble transmission method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 determining time-frequency domain resources (also referred to as time domain and/or frequency domain resources) for transmitting the preamble on the unlicensed carrier;
  • Step S104 Send a preamble on the determined time-frequency domain resource.
  • the preamble is sent by sending the Msg message on the determined time domain and/or the frequency domain resource, where the Msg message includes at least one of the following information: the preamble, the user equipment identifier ID, C-RNTI, Radio Resource Control (RRC) request, Scheduling Request (SR), Buffer Status Report (BSR).
  • RRC Radio Resource Control
  • SR Scheduling Request
  • BSR Buffer Status Report
  • time domain and/or frequency domain resources for transmitting the preamble and another part for transmitting other information than the preamble
  • the time domain and/or frequency domain resources may be the same in the time domain, but offset in the frequency domain by two offset time domains and/or frequency domain resources; or may be the same in the frequency domain, but the time domain is biased Two time domain and/or frequency domain resources of another offset; or two time domain and/or frequency domain resources having an offset on the time domain and the frequency domain, wherein the foregoing Multiple offsets may be the same or different.
  • the other part of the time domain and/or the frequency resource for transmitting the other information may be scrambled by using the TC-RNTI.
  • the TC-RNTI may also be obtained in multiple manners, for example, may be obtained by at least one of the following methods: The method is obtained by the method corresponding to the preamble, and is obtained by the method allocated by the base station, and is obtained by the base station and the UE in a manner negotiated with the user equipment ID.
  • the preamble can also be determined in a plurality of manners: for example, it can be determined by at least one of the following manners: determining, by means of a manner in which the base station allocates the UE, by means of physical layer signaling, and by means of high layer signaling The determining is determined by the manner in which the base station negotiates with the UE, and is determined by the manner in which the system is configured for the UE.
  • the preamble is sent on the time domain and/or the frequency domain resource determined on the unlicensed carrier, which solves the problem that the preamble cannot be transmitted on the unlicensed carrier to perform the random access process in the related art, and not only fills the problem.
  • the related art cannot transmit the preamble on the unlicensed carrier to perform the random access blank, thereby achieving the effect of successfully transmitting the preamble on the unlicensed carrier for random access, and effectively improving the user experience.
  • the UE sends the preamble on the determined time domain and/or the frequency domain resource.
  • the manner of the time domain and/or the frequency domain resource is different, and the manner of sending the message may be multiple, that is, the UE sends the Preamble code on the unlicensed carrier.
  • Time domain and / or frequency domain resources The transmission of the preamble Preamble code may include various methods, which are illustrated below.
  • determining the time domain and/or frequency domain resources for transmitting the preamble according to a predefined manner; and/or determining, according to physical layer downlink control information DCI signaling, for transmitting the preamble The time domain and/or frequency domain resources; and/or determining the time domain and/or frequency domain resources for transmitting the preamble according to the high layer radio resource control RRC signaling;
  • the use right of the carrier needs to be acquired according to the Listen Before Talk (LBT) mechanism.
  • LBT Listen Before Talk
  • the LBT mechanism can be performed after listening first. Once (base station or UE) wins the right to use the unlicensed carrier, the random access procedure initiation can be initiated. Conversely, when the UE fails to perform LBT, this may cause the entire random access procedure to be delayed, and even worse, the potential on all uplink carriers within the same Timing Advance Group (TAG). Uplink transmissions will all be delayed.
  • TAG Timing Advance Group
  • the uplink authorized carrier and the unlicensed carrier may belong to different TAGs, especially in the scenario where the small cell is not co-shared on the authorized carrier and the unlicensed carrier. Therefore, it is very necessary to perform an independent and accurate random access procedure on an unlicensed carrier in order to obtain uplink synchronization on an unlicensed carrier.
  • the LBT or Clear Channel Assessment (CCA) detection may be performed on the unlicensed carrier, and the execution result of the LBT mechanism and/or the CCA detection may be determined according to the execution result of the LBT mechanism and/or the CCA detection.
  • CCA Clear Channel Assessment
  • determining the sending preamble according to the execution result is a preferred Considering the successful transmission of the preamble, for the sake of simplicity of the process or increasing the speed of random access, the LBT mechanism or CCA detection may not be performed on the unlicensed carrier, but the short control signaling (Short Control Singal, referred to as short The Preamble code is sent for the determined time domain and/or frequency domain resources for the SCS).
  • the time domain and/or frequency domain resources for transmitting the Preamble code can be determined according to the execution result of performing the LBT mechanism and/or CCA detection on the unlicensed carrier. That is, determining the time domain and/or frequency domain resources for transmitting the preamble on the unlicensed carrier includes: performing an LBT mechanism and/or an idle channel assessment CCA detection on the unlicensed carrier; performing the LBT mechanism and/or Or the execution result of the CCA detection, determining the time domain and/or frequency domain resources used to transmit the preamble on the unlicensed carrier. According to the execution result, when determining the time domain and/or frequency domain resource for transmitting the Preamble code, it can also be used for various scenarios, which are respectively described below:
  • Determining the time domain and/or frequency domain resources for transmitting the preamble on the unlicensed carrier according to the execution result of performing the LBT mechanism and/or the CCA detection includes one of the following:
  • the UE Determining that the first predetermined time domain and/or frequency domain resource is used for the case where the execution result is that the LBT mechanism and/or the CCA detection is successful before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier is performed. Transmitting a time domain and/or a frequency domain resource of the preamble, the UE transmitting the preamble on the first predetermined time domain and/or the frequency domain resource; it should be noted that the first predetermined time domain and/or the frequency domain resource It may be K subframes, or N OFDM symbols, where K, N is an integer greater than or equal to 1, preferably 1, 2, 3.
  • determining the neighboring time domain and/or frequency domain resources after the LBT and/or CCA detection success time is the time domain and/or frequency domain resource for transmitting the preamble, after that, Transmitting, by the UE, a preamble on the determined neighboring time domain and/or frequency domain resource; wherein, the neighboring time domain and/or the frequency domain resource after the success time may be one or more subframes after the success time, or one or Multiple symbols.
  • the time domain and/or frequency domain resource used to transmit the preamble is determined to be the first time domain and/or frequency domain resource after the successful moment of performing the LBT mechanism and/or CCA detection.
  • the first predetermined time domain and/or frequency domain of the unlicensed carrier Performing LBT mechanism and/or CCA detection before the second predetermined time domain and/or frequency domain resource after the resource, and performing LBT mechanism and/or CCA detection successfully before the second predetermined time domain and/or frequency domain resource Determining, that the second predetermined time domain and/or the frequency domain resource is a time domain and/or a frequency domain resource for transmitting the preamble; that is, executing the LBT before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier
  • the mechanism and/or CCA detection fails, the unlicensed carrier is re-competed on the next corresponding second time domain and/or frequency domain resource.
  • the LBT mechanism and/or CCA detection continues to be performed before the subsequent time domain and/or frequency domain resources, and attempts to compete for the unlicensed carrier on the subsequent time domain and/or frequency domain resources until the competition
  • the first time domain and/or the frequency domain resource after the successful execution time is used to transmit the Preamble code or the preamble is transmitted after the successful execution of the time domain and/or the frequency domain resource.
  • the UE when the UE performs the LBT mechanism and/or the CCA detection fails before the first predetermined time domain and/or the frequency domain resource, that is, the UE does not compete for the unlicensed carrier, the UE continues.
  • Performing an LBT mechanism and/or CCA detection transmitting an Msg message on the first time domain and/or frequency domain resource after performing the LBT mechanism and/or the CCA detection success time; or, the UE is in the next first time domain and/or
  • the LBT and/or the CCA are executed before the frequency domain resource (ie, the second predetermined time domain and/or the frequency domain resource), and if the LBT and/or the CCA are successful, the current time domain and/or the frequency domain resource are sent. Msg message.
  • the Msg message is stopped on the current first time domain and/or the frequency domain resource, and must wait until the next first time domain and/or frequency domain resource time to continue to try to execute the LBT. And / or CCA.
  • the foregoing neighboring time domain and/or frequency domain resources, the second predetermined time domain and/or the frequency domain resource, and the third time domain and/or the frequency domain resource may be one or more, respectively.
  • the plurality of adjacent time domain and/or frequency domain resources or the plurality of second predetermined time domain and/or frequency domain resources in the plurality of third predetermined time domain and/or frequency domain resources respectively in the time domain can be continuous or discrete.
  • the neighboring time domain and/or frequency domain resource, the second predetermined time domain and/or the frequency domain resource, and the third time domain and/or the frequency domain resource include discrete time domain and/or frequency domain resources in the time domain.
  • time domain and/or frequency domain resources with equal interval and resource block size in time domain time domain and/or frequency domain resources with equal time interval and same resource block size
  • Time domain and/or frequency domain resources that are equally spaced and have different resource block sizes time domain and/or frequency domain resources that are not equally spaced in the time domain and have the same resource block size.
  • the manner of determining may include a plurality of, for example, a first predetermined time domain and/or a frequency domain resource, a second predetermined time domain resource, and a third predetermined time domain
  • at least one of a starting position or a duration or an ending position of the frequency domain resource, the LBT/CCA or the CP or the GT or the PRACH resource may be determined by at least one of the following: the allocation by the base station to the user equipment UE Mode determination; determined by means of physical layer signaling (for example, Downlink Control Information (DCI)) notification; determined by high-level signaling (eg, RRC) notification; negotiated by the base station and the UE Determined; determined by the way the system is pre-configured for the UE.
  • DCI Downlink Control Information
  • a preferred processing manner is provided. For example, performing an LBT mechanism and/or CCA detection within a time window for transmitting a preamble on an unlicensed carrier and performing an LBT mechanism and/or CCA before a third predetermined time domain and/or frequency domain resource within the time window If the detection is successful, the third predetermined time domain and/or frequency domain resource is determined to be a time domain and/or a frequency domain resource for transmitting the preamble.
  • the candidate time domain and/or frequency domain resources ie, the third time domain and/or frequency domain resources described above
  • the candidate time domain and/or frequency domain resource is successfully executed, it is determined that the candidate time domain and/or frequency domain resource is a time domain and/or a frequency domain resource for transmitting the preamble.
  • the time window may be located at multiple time positions that may be used to perform LBT mechanism and/or CCA detection, for example, may be located before, after, or directly including the first predetermined time domain and/or frequency domain resources.
  • the third predetermined time domain and/or frequency domain resource in the time window may be determined by: determining an offset distance between the first predetermined time domain and/or the frequency domain resource and the start of the time window. a first offset; a second offset for identifying a third predetermined time domain and/or an offset distance between the frequency domain resource and the start of the time window for transmitting the preamble in the time window; The size of the time domain and/or frequency domain resources; the number of third predetermined time domains and/or frequency domain resources; the window length of the time window; the interval between the third predetermined time domain and/or frequency domain resources.
  • the third predetermined time domain and/or frequency domain resources included in the time window may also be one or more.
  • the first The three predetermined time domain and/or frequency domain resources may be continuous or discrete in the time domain.
  • the third predetermined time domain and/or the frequency domain resource is discrete in the time domain, multiple forms are also included, for example, at least one of the following forms may be included: the time domain is equally spaced and the resource block size is unequal Time domain resources; time domain resources with equal time interval and same resource block size; time domain resources with unequal intervals and different resource block sizes in the time domain; when the time domain is not equally spaced and the resource block size is the same Domain resource.
  • Mode 1 shortening the time domain resources of the preamble Preamble code Interval/cycle.
  • Method 2 Design the preamble Preamble code transmission time window.
  • the sending time window of the preamble Preamble code may be located in multiple time zones, for example, may be located in any one of the following time zones: the time window is located before the first time domain and/or the frequency domain resource; the time window is located at the first predetermined time After the domain and/or the frequency domain resource; the time window includes the first predetermined time domain and/or frequency domain resource; the time window is located before the time domain and/or frequency domain location where the LBT mechanism and/or CCA detection is performed; the time window is located After performing the time domain and/or frequency domain location of the LBT mechanism and/or CCA detection; the time window contains time domain and/or frequency domain locations that perform LBT mechanisms and/or CCA detection.
  • the time window is located after the first predetermined time domain and/or frequency resource.
  • the transmission time window of the preamble Preamble code is used to supplement the time domain and/or frequency domain resources of the Preamble code.
  • the first predetermined time domain and/or frequency domain resources may be continuous in the time domain or may be discontinuous in the time domain.
  • the method includes the following processing:
  • the UE may attempt to supplement the time domain and/or frequency domain resources of the preamble Preamble code before the first time domain and/or frequency domain resources are not contending for the unlicensed carrier. Continue to perform LBT mechanisms and/or CCA testing. If the right to use the unlicensed carrier is successfully contending, the UE transmits on the time domain and/or frequency domain resource currently used to supplement the transmission of the Preamble code.
  • the UE stops transmitting on the time domain and/or frequency domain resources currently used for supplemental transmission of the Preamble code, but continues to try to supplement the transmission of the preamble Preamble code in the time window.
  • the LBT mechanism and/or CCA detection continues before the time domain resources. If the LBT mechanism is performed and/or the CCA detection is successful, the Preamble code is transmitted on the time domain and/or frequency domain resources currently used to supplement the transmitted preamble Preamble code.
  • the time domain and/or the frequency domain resources used to supplement the preamble Preamble code in the time window continue to try to perform the LBT mechanism and/or CCA detection to send the Preamble code. Until the end of the time window. If the UE has not been able to contend for the unlicensed carrier in the current time window, try in the next first predetermined time domain and/or frequency domain resources (such as the second predetermined time domain and/or frequency domain resources described above) and the time window send.
  • the method includes the following processing: If the UE does not compete for the unlicensed carrier on the first predetermined time domain and/or the frequency domain resource, the UE stops sending the Preamble on the current first predetermined time domain and/or the frequency domain resource, and attempts to be the first in the time window.
  • the Preamble code is transmitted on the time domain and/or frequency domain resources used to supplement the preamble Preamble code.
  • the frequency domain resource location is relative to the first predetermined time domain sum / or frequency domain resources can be unchanged, or, changed.
  • the frequency domain resource location is relative to the first predetermined time domain sum / or frequency domain resources can be unchanged, or, changed.
  • the LBT mechanism and/or CCA detection continues to be performed on the next time domain and/or frequency domain resource used to supplement the transmit preamble Preamble code within the time window, attempting to transmit the Preamble code until the end of the time window. If the unlicensed carrier fails to compete in the time window, the UE can only wait for the next scheduled first predetermined time domain resource (ie, the second predetermined time domain and/or frequency domain resource described above) and the time window to try. send.
  • the next scheduled first predetermined time domain resource ie, the second predetermined time domain and/or frequency domain resource described above
  • the UE does not compete for the unlicensed carrier on the first predetermined time domain resource, and the first PRACH time domain resource location used to supplement the transmission of the Preamble code in the long window is not reached, then in the first predetermined time domain After the resource, the first time domain and/or the frequency domain resource before the PRACH is used in the time window to continue to try to send the Preamble. If the LBT mechanism and/or the CCA detection is successful, the Preamble code is sent at the current time point. . Preferably, the opportunity to send the Preamble code is added to the first time domain resource after the configured first predetermined time domain resource.
  • the time domain and/or the frequency domain resource for transmitting the Preamble may be additionally added after the transmission window.
  • the method for increasing the probability of transmission of the Preamble code in the implementation method for determining the time domain and/or the frequency domain resource for transmitting the preamble is optimized, and the process based on the competitive random access method is optimized, thereby To a lesser extent, the uplink transmission delay is reduced.
  • the location for performing the LBT mechanism and/or the CCA detection may also include various possibilities, for example, roughly divided into two types,
  • the execution location of the LBT mechanism and/or CCA detection is performed, or the execution location of the LBT mechanism and/or CCA detection is not limited.
  • the defined execution location is the first predetermined time domain and/or the region before the frequency domain resource
  • the undefined execution location includes any location where the UE can perform the LBT mechanism and/or CCA detection.
  • the UE determines to send the Preamble code according to the success time of performing the LBT mechanism and/or the CCA detection success.
  • determining the time domain and/or the frequency domain resource used for transmitting the Preamble code is a successful moment for performing the LBT mechanism and/or the CCA detection success. After the first time domain and / or frequency domain resources.
  • the foregoing first predetermined time domain and/or frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the region before the frequency domain resource may also include multiple types.
  • the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the region before the frequency domain resource may include one of the following: a predetermined time domain and/or a frequency domain resource or a special subframe before the second predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource; the first predetermined time domain and/or the frequency domain An uplink subframe before the resource or the second predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource; the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain sum / or a preamble sub-frame before the frequency domain resource or before the third predetermined time domain and
  • first predetermined time domain and/or frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the area before the frequency domain resource belong to a relative limitation.
  • the location where the LBT mechanism and/or the CCA detection is performed, and the location where the LBT mechanism and/or the CCA detection is performed may also be not limited.
  • the location where the LBT mechanism and/or the CCA detection is performed may be any position that can be performed, and therefore,
  • the time domain and/or frequency domain resources corresponding to the transmission of the preamble also depend on the location at which the LBT mechanism and/or CCA detection is performed, and the successful moment of execution success.
  • the various relatively defined types described above are separately described below.
  • the area performing the LBT mechanism and/or CCA detection includes at least one of: before the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and/or
  • the area in front of the frequency domain resource is an Uplink Pilot Time Slot (UpPTS)
  • the area for performing the LBT mechanism and/or the CCA detection includes at least one of the following: All UpPTS; partial/all guard time slots GP and/or UpPTS; partial/all DwPTS and/or GP and/or UpPTS; last k symbols and/or DwPTS and/or GP and/or UpPTS in the downlink subframe; /all UpPTS and / or part / all CP time; part / all GP and /
  • the area for performing the LBT mechanism and/or the CCA detection includes at least one of: part/all GP time; part/all GP and/or part/all CP time; part/all downlink pilot time slots DwPTS and / Or GP and/or partial/all CP time; last k symbols and/or DwPTS and/or GP and/or partial/all CP time in the downlink subframe.
  • the area performing the LBT mechanism and/or CCA detection includes at least one of: before the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and/or The area before the frequency domain resource is an uplink subframe, and the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain
  • the area for performing the LBT mechanism and/or the CCA detection includes the following At least one: part/all GT time of the PRACH of the previous subframe; part/all GT time of the PRACH of the previous subframe and/or first predetermined time domain and/or frequency domain resource or second predetermined
  • the time domain and/or the frequency domain resource used for transmitting the preamble depends on the location where the LBT mechanism and/or the CCA detection is performed and/or the success time of the successful execution. Description.
  • the time domain and/or frequency domain resource location for transmitting the preamble depends on the location and/or the time of success of performing the LBT mechanism and/or CCA detection including: transmitting the Preamble according to the location determination of performing the LBT mechanism and/or CCA detection.
  • the PRACH time domain resource of the code ie, the time domain and/or frequency domain resource used to transmit the preamble. If the time domain and/or frequency domain location determination of the LBT mechanism and/or CCA detection is performed, the UE competes for the use of the unlicensed carrier in the possible time domain and/or frequency domain location of the LBT mechanism and/or CCA detection. .
  • the Preamble code is transmitted on the k complete OFDM symbols after the LBT mechanism and/or the CCA detection is successful, or one or more subframes. If the successful time to perform the LBT mechanism and/or the CCA detection is not at the symbol or subframe boundary, then a reserved signal or an occupied signal needs to be transmitted. The transmission of the Preamble code depends on the location where the LBT mechanism and/or CCA detection is performed.
  • the time domain and/or frequency domain resource location for transmitting the preamble depends on the location and/or success time at which the LBT mechanism and/or CCA detection is performed, including: not limiting the execution of the LBT mechanism and/or the CCA detection location, determining Send time domain and/or frequency domain resources of the Preamble code. That is, the UE may start performing the LBT process at any time, and send the Preamble code on the k complete OFDM symbols after the LBT mechanism/CCA detection success time is executed, or one or more subframes. If the LBT mechanism and/or the CCA detection success time is not reached at the symbol or subframe boundary, a reserved signal or an occupied signal needs to be transmitted.
  • the transmission of the Preamble code depends on the execution of the LBT mechanism and/or the CCA detection start time and the success time, and is independent of the configured PRACH or available PRACH resources, or may be related.
  • the supported formats are different, as explained below.
  • the location where the LBT mechanism and/or the CCA detection is performed may include one of the following: part or all of the UpPTS; part or all of the UpPTS and Part or all of the CP time; part or all of the GP and UpPT and some or all of the CP time; part or all of the DwPTS and GP and UpPT and some or all of the CP time; the last k symbols and DwPTS and GP and UpPT and part of the downlink subframe Or all CP time.
  • the LBT is executed.
  • the location of the mechanism and/or CCA detection includes one of: some or all of the GT time in the PRACH subframe; some or all of the GT and some or all of the CP time in the first time domain and/or frequency domain resources.
  • the starting point for performing the LBT mechanism and/or CCA detection may be from the starting point of the GT or a position in the GT.
  • the location where the LBT mechanism and/or the CCA detection is performed may include one of the following: the last k in the normal subframe. OFDM symbol; k OFDM symbols in a normal subframe and some or all CPs in the first time domain and/or frequency domain resources.
  • the location at which the LBT mechanism and/or CCA detection is performed includes one of: partial or full GP time; some or all GPs and some or all of the CP time; some or all of the DwPTS and GP and some or all of the CP time.
  • the UE monitors the RAR sent by the eNB, including: the cyclic redundancy check of the downlink control information DCI of the RAR by the UE according to the preset or the radio network temporary identifier RA-RNTI corresponding to the Preamble.
  • the code Cyclic Redundancy Check, CRC for short
  • CRC Cyclic Redundancy Check
  • the method further includes: the UE uses the predetermined eNB or the eNB to notify the TC-RNTI to perform descrambling on the physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) to obtain the C-RNTI, or the UE ID. And after the UE listens to the RAR sent by the eNB, sends the Msg3 according to the uplink grant allocated to itself or the time domain and/or frequency domain resource scheduled by the eNB and the UE.
  • the Msg3 message may be a UE ID, a C-RNTI, a Radio Resource Control (RRC) request, or some or all of the SRs.
  • RRC Radio Resource Control
  • the use of the unlicensed carrier is based on the execution result of the LBT mechanism/CCA detection, there is a certain degree of uncertainty, so once the usage right of the unlicensed carrier is acquired, some useful information is transmitted as early as possible. For example, when transmitting the preamble on the determined time domain and/or the frequency domain resource, determining, according to the determined time domain and/or the frequency domain resource, the fourth part of the unlicensed carrier for transmitting part or all of the content of the Msg3 message Predetermining a time domain and/or a frequency domain resource; transmitting a preamble on the determined time domain and/or frequency domain resource, and transmitting part or all of the Msg3 message on the determined fourth predetermined time domain and/or frequency domain resource .
  • the fourth predetermined time domain and/or the frequency domain resource may be multiple, for example, may include at least one of the following: the time domain and/or the frequency domain resource are the same in the time domain, and the frequency domain is offset by the third. Offset time domain and/or frequency domain resources; offset from the time domain and/or frequency domain resources by a fourth offset in the time domain, the same time domain and/or frequency domain resources in the frequency domain.
  • FIG. 2 is a flowchart of a random access method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 Acquire a right to use an unlicensed carrier
  • Step S204 Perform random access processing according to the unlicensed carrier that obtains the usage right.
  • the random access processing is performed on the unlicensed carrier that obtains the usage right, which solves the problem that the random access process on the unlicensed carrier cannot be implemented in the related art, and the related technology cannot be used on the unlicensed carrier.
  • the random access blank achieves the effect of successfully performing random access on the unlicensed carrier, effectively improving the user experience.
  • the method for performing random access processing according to the obtained unlicensed carrier may be performed in multiple manners.
  • the Msg_1 message may be sent to the base station on the unlicensed carrier, where the Msg_1 message includes the preamble carrying the random access.
  • the Msg_M message may be sent to the base station on the unlicensed carrier, where the Msg_M message includes the Msg1 message carrying the preamble for performing random access and/or the Msg3 message carrying the entire content of the Msg3 message;
  • time domain and/or frequency domain resources used for sending the Msg1 message may be the same as or different from the time domain and/or frequency domain resources used to send the foregoing Msg3 message; when the Msg1 message is sent.
  • the domain and/or frequency domain resources may also be the same or different from the time domain and/or frequency domain resources used to transmit the Msg3 message.
  • the foregoing time domain and/or frequency domain resources may also be in various forms.
  • the time domain may be the same, the frequency domain is different in time domain and/or frequency domain resources, and may be different in time domain and in the same frequency domain.
  • the time domain and/or frequency domain resources may also be time domain and/or frequency domain resources with different time domains and different frequency domains.
  • transmitting the partial Msg3 message and/or the Msg3 message further comprises: using the first temporary cell radio network temporary identifier TC-RNTI for the transport channel and/or the control channel for transmitting the partial Msg3 message and/or the Msg3 message.
  • the TC-RNTI is obtained by using at least one of the following correspondences: a correspondence between the TC-RNTI and the preamble, a correspondence between the TC-RNTI and the UE ID, and between the TC-RNTI and the preamble and the UE ID. Correspondence; or,
  • the TC-RNTI is obtained by at least one of the following manners: the method is obtained by the base station and the UE, and is obtained by means of the base station notifying or configuring the UE, and is obtained by means of the high-level signaling notification, and is obtained by means of physical layer signaling notification. Obtained by means of media access control MAC layer signaling.
  • the first response message may carry at least one of the following information: a second TC-RNTI, an uplink grant information, a preamble index, a C-RNTI, and a TA.
  • Sending the remaining Msg3 message further includes: scrambling the first TC-RNTI or the second TC-RNTI on the transport channel and/or the control channel used to send the remaining Msg3 message.
  • the UE After transmitting Msg3 on the uplink grant assigned to itself, the UE receives the Msg4 message sent by the eNB.
  • the CRC in the DCI in the Msg4 message is scrambled by using the TC-RNTI allocated to the UE or the previously agreed.
  • the UE After receiving the Msg4 message sent by the eNB, the UE sends an indication signal for notifying the eNB that the UE access is successful, or re-initiates the random access indication message.
  • determining a time domain and/or a frequency domain resource for transmitting a preamble may be separately used to determine a time domain and/or a frequency domain resource for transmitting a preamble, or may be combined. Make a determination, for example,
  • the UE performs the LBT mechanism and/or the CCA detection fails before the first predetermined time domain and/or the frequency domain resource, stopping transmitting the Preamble code on the current time domain and/or the frequency domain resource, and the time window
  • the third time domain and/or the frequency domain resource continue to try to compete for the unlicensed carrier. If the LBT mechanism and/or the CCA detection is successful, the Preamble code is sent on the time domain and/or the frequency domain resource. If the LBT mechanism and/or the CCA detection fails, continue to try to compete for the unlicensed carrier before the candidate time domain and/or frequency domain resources in the time window, in any of the third predetermined time domain and/or frequency domain resources.
  • the Preamble code is transmitted on the time domain and/or the frequency domain resource.
  • the Preamble code is stopped, and only the next configured time domain and/or frequency domain resource is re-waited.
  • Competitive channel if the unlicensed carrier is not contending on the candidate time domain and/or the frequency domain resource in the configured time window, the Preamble code is stopped, and only the next configured time domain and/or frequency domain resource is re-waited.
  • FIG. 3 is a flowchart of a method for receiving a preamble according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
  • Step S302 receiving a preamble sent by the user equipment UE on the time domain and/or the frequency domain resource on the unlicensed carrier; wherein, corresponding to the manner of sending the Msg message on the time domain and/or the frequency domain resource, the time
  • the domain and/or frequency domain resources include partial time domain and/or frequency domain resources for transmitting the preamble and other information for transmitting the preamble (for example, including the UE ID, C-RNTI, at least in the SR) A) Another part of the resources.
  • Step S304 performing random access processing on the UE according to the received preamble.
  • the preamble is received on the time domain and/or the frequency domain resource determined on the unlicensed carrier, which solves the problem that the preamble cannot be received on the unlicensed carrier to perform the random access process in the related art, and not only fills the problem.
  • the related art cannot receive the preamble on the unlicensed carrier to perform the random access blank, thereby achieving the effect of successfully receiving the preamble on the unlicensed carrier for random access, and effectively improving the user experience.
  • multiple processing modes may be used. For example, in order to improve the success rate of the preamble transmission, the UE may perform on the unlicensed carrier according to the UE. The LBT mechanism and/or CCA detection thereby contends for the time domain and/or frequency domain resources used to transmit the preamble, transmitting the preamble.
  • the preamble transmitted by the UE on the time domain and/or the frequency domain resource on the unlicensed carrier by the short control signaling SCS may also be directly received. That is, when the UE does not perform the LBT mechanism and/or the CCA detects the unlicensed carrier, the preamble is directly transmitted through the SCS. Although the preamble cannot be successfully transmitted, the advantage of speeding up the process is also provided.
  • the Msg3 message may be received on the fourth predetermined time domain and/or frequency domain resource on the unlicensed carrier.
  • the fourth predetermined time domain and/or the frequency domain resource comprises at least one of the following: the time domain and/or the frequency domain resource are the same in the time domain, and the third offset is offset in the frequency domain A quantity of time domain and/or frequency domain resources; offsetting a fourth offset from the time domain and/or frequency domain resources in the time domain, and the same time domain and/or frequency domain resources in the frequency domain.
  • the method before receiving the preamble sent by the UE on the time domain and/or the frequency domain resource on the unlicensed carrier, the method further includes: sending, to the UE, the time domain and/or the frequency domain resource and/or the fourth time domain. And/or instructions for frequency domain resources and/or preambles.
  • the instruction may include: physical layer signaling DCI, or high layer radio resource control RRC signaling.
  • the above DCI or The RRC signaling may include at least one of the following information: a TC-RNTI, a Preamble identifier, a time domain and/or a frequency domain resource for transmitting the Preamble, or a time domain and/or a frequency domain resource for transmitting some or all of the Msg3 messages.
  • FIG. 4 is a flowchart of a random access method 2 according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps:
  • Step S402 determining an unlicensed carrier that the user equipment UE contends
  • Step S404 performing random access processing of the UE according to the determined unlicensed carrier.
  • the UE performs the random access processing of the UE on the unlicensed carrier that is determined to be in the competition, and solves the problem that the random access process on the unlicensed carrier cannot be implemented in the related art, which not only fills the related technology but cannot The random access blank is performed on the authorized carrier, thereby achieving the effect of successfully performing random access on the unlicensed carrier, thereby effectively improving the user experience.
  • performing, by the base station, the performing the random access processing of the UE according to the determined unlicensed carrier including: receiving, by the UE, the Msg_1 message, where the Msg_1 message includes carrying random access a Msg1 message of the preamble and/or a partial Msg3 message carrying part of the content of the Msg3 message; sending a first response message to the UE based on the Msg_1 message; receiving part of the content of the Msg3 message carried by the UE according to the first response message The remaining Msg3 message of the remaining content; the Msg4 message is sent to the UE according to the remaining Msg3 message, where the Msg4 message is used by the UE to determine whether the random access is performed on the unlicensed carrier is successful; or the UE is sent on the unlicensed carrier.
  • the Msg_M message where the Msg_M message includes an Msg1 message carrying a preamble for performing random access and/or an Msg3 message carrying all contents of the Msg3 message; and transmitting a second response message to the UE according to the Msg_M message, where the second response message It is used by the UE to determine whether the random access on the unlicensed carrier is successful.
  • the first response message may be sent to the UE based on the Msg_1 message.
  • the first response message may be sent to the UE directly on the authorized carrier, or may be performed after listening to the unlicensed carrier.
  • the LBT mechanism and/or the idle channel evaluates the CCA detection and transmits a first response message on the time domain and/or frequency domain resources that are contending after performing the LBT mechanism and/or the CCA detection succeeds.
  • the random access response RAR corresponding to the Preamble code may be sent to the UE; or the response information of the Msg1 and some or all of the Msg3 messages may be sent.
  • the response information of the Msg1 and the part or all of the Msg3 messages includes at least one of the following: a TC-RNTI, an uplink grant, a TA, a Preamble Index, a C-RNTI, and a UE ID.
  • the RAR may include at least one of the following: TC-RNTI, Upstream Authorization, TA, Preamble Index.
  • the subsequent random access further includes the following process: after transmitting the random access response RAR corresponding to the Preamble code, receiving the Msg3 message sent by the associated UE according to the uplink grant assigned to itself.
  • the remaining UE receives the remaining or all Msg3 messages according to the uplink grant assigned to the UE.
  • the Msg4 message is sent to the UE. It should be noted that, corresponding to the processing of the UE side scrambling described above, the base station also needs to perform a corresponding descrambling operation.
  • the base station after receiving a part of the Msg3 message and/or the Msg3 message, the base station further includes: a part of the Msg3 message and/or The Msg3 message is descrambled by using the first temporary cell radio network temporary identifier TC-RNTI.
  • the response message carries the second TC-RNTI, and if the remaining Msg3 message is received, the received remaining Msg3 message is descrambled by using the first TC-RNTI or the second TC-RNTI.
  • a non-contention random access method is presented. This example is applicable to the handover process, the arrival of downlink data, and the location of the UE. It is also applicable to (e) CA, or DC scenarios. The specific steps are as follows:
  • Step 1 The evolved base station eNB allocates a dedicated identifier, that is, a C-RNTI, to the UE.
  • Step 2 The eNB notifies the UE to perform random access and complete uplink synchronization.
  • the eNB notifies the subordinate UE to perform random access and completes uplink synchronization, and the notification signaling may be physical layer signaling or high layer signaling.
  • the physical layer signaling can be a DCI.
  • the CRC in the DCI is scrambled or masked by using the C-RNTI of the UE;
  • the eNB directly informs the UE to perform random access by using DCI in the PDCCH;
  • the eNB needs to perform LBT or idle channel evaluation CCA detection before sending the DCI. If it is detected that the channel state is idle, it is considered that the usage right of the unlicensed carrier is acquired, and the DCI information may be sent on the unlicensed carrier. Conversely, if it fails to compete for an unlicensed carrier, it will not be able to send a DCI message on the unlicensed carrier. Optionally, in order to prevent the eNB from performing the LBT failure and fail to access the unlicensed carrier, the DCI may be sent on the authorized carrier.
  • the LBT mechanism includes one of the following : LBT Cat4; or, LBT Cat2, or Enhanced LBT Cat2, or, direct eCCA process.
  • the unlicensed carrier uplink and downlink transmission adopts the LBT Cat4 mechanism, and the contention window is large, for example, 7, 15, 31, 63, 127, 255, 511, 1023, etc., and the base station can perform the PDCCH order for transmitting the random access trigger signaling on the unlicensed carrier.
  • LBT Cat4 with a small competition window for example, the competition window can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.
  • a simplified LBT mechanism such as LBT Cat2).
  • the transmission device eg, eNB or UE
  • the transmission device detects that the channel is idle within the defer period, downlink transmission is possible. and / or,
  • the downlink or uplink transmission may be performed according to the following steps until the random backoff value N is decremented to zero.
  • Step1 Set the initial random backoff value N.
  • the random backoff value N may be a number uniformly generated between [0, CWp] or randomly generated by the binomial distribution, or may be a base station indicating an N value or a predefined N value.
  • CWp is a random number between CWmin and CWmax, where CWmin is a positive integer not less than 1, and CWmax is a maximum of 1024.
  • CWmax may be 1, 2, 3, 4, 5, 6, 7, 11, 15, 31, 63, 127, 255 or the like.
  • Step 2 Determine whether the current N value is greater than 0. If the result of the judgment N is greater than 0, the value of N is decremented by a certain number of operations.
  • the specific number can be a base station configuration, or, predefined.
  • Step 3 The device detects the channel idle condition in the slot. If the channel is detected to be idle in the slot, the process proceeds to Step 4. Conversely, if the channel is detected to be busy in the slot, go to Step 5.
  • Step 4 Determine whether the current N value is equal to 0. If it is equal to 0, stop channel detection and consider that the usage right of the unlicensed carrier is obtained. Conversely, if N is not equal to 0, then go to Step 2.
  • Step 5 Detect the channel idle condition in the defer period. If the channel is detected to be idle during the defer period, then go to Step 2. Conversely, if the channel is detected to be busy during the defer period, Step 5 is repeated.
  • the defer period can have a fixed duration length plus n times the slot. n is a number greater than or equal to 0, and preferably n is 0, 1, 2, 3, and the like.
  • the slot length is 9us and the fixed duration is 16us.
  • the flow of LBT Cat2 is roughly as follows: the CCA detection start time can be fixed, or dynamically variable, or randomly selected within a certain interval within a certain interval, or within a certain interval within a certain interval. Configure a fixed location. If the detection channel is busy from idle, and the continuous detection channel idle time is not less than the preset CCA duration length, the use right of the unlicensed carrier is considered to be acquired.
  • the eNB sends the DCI to perform channel access using the LBT Cat2.
  • the CCA duration may be 16us+n*slot duration, and n is an integer greater than or equal to 0.
  • n is 1, 2, 3, and the like.
  • the slot length is 9us. That is, the CCA duration can be 16us, or 25us, 34us, etc., and can be 9us, or 4us.
  • the enhanced LBT Cat2 differs from the LBT Cat2 in that the starting point for CCA detection can be randomly selected over a certain period of time. It is advantageous for the fairness of the contention access channel between the asynchronous systems and the transmission equipment that causes the CCA detection starting point to compete for the access channel in advance. For example, suppose a certain time period is 10, which can be divided into 10 small segments, and each small segment occupies 1 copy. Then, the transmission device 1 can use the starting point of the third short segment of the 10 small segments as the starting point of its own CCA detection, and the transmission device 2 can be fixed. Configure the start of the 7th segment in the 10 segment as the starting point for your own CCA detection. That is, different transmission devices can randomly select the CCA detection starting point, and can also fixedly configure different starting positions.
  • the eCCA process is composed of N slot processes, and when the slot detects that the channel is busy, enters the defer period or does not enter the defer period.
  • N is a random backoff value, an integer randomly generated between [0, CWp], and an integer randomly generated by CWp between [CWmin, CWmax].
  • N may be indicated by the base station to the UE, or predefined.
  • N can be 1, 2, 3.
  • the maximum contention window CWmax can be a positive integer between [1, 63].
  • the specific eCCA process is:
  • Step 1 Generate a random backoff value N.
  • Step 2 Determine if the current N is greater than 0. If it is greater than 0, proceed to step 3. If it is equal to 0, it is considered that the unauthorized carrier usage right is obtained. At this time, if the UE has not performed slot detection yet, or does not enter the eCCA process, the random backoff value N needs to be reset, and the process proceeds to step 1.
  • Step 3 The transmission device detects whether the channel is idle in the slot. If the channel is idle, it proceeds to step 4. Or, if it is detected that the channel is busy, enter the defer period, that is, step 5, or directly enter the defer period, and directly repeat step 3.
  • Step 4 Perform an N value decrement by a certain number of value operations.
  • the certain number of values may be predefined, or indicated by the base station, or the base station and the UE agree in advance.
  • N N-1. Go to step 2.
  • Step 5 Detect whether the channel is idle in the defer period. If the evaluation channel is idle, proceed to step 4. If the detection channel is busy, repeat step 5.
  • the defer period is composed of 16 us+n*slot, and n is an integer greater than or equal to 0. Preferably, n is 0, 1, 2, 3, and the like.
  • the slot length is 9us.
  • the UE receiving the scrambled CRC will obtain the pre-scrambled CRC according to the corresponding descrambling mode.
  • the high layer signaling may be RRC signaling.
  • the high layer signaling may be common signaling sent to the UE, or may be dedicated RRC signaling sent to the UE.
  • the RRC signaling is mainly used to notify the UE to perform random access.
  • At least one of the following may be included in the foregoing DCI or RRC notification signaling:
  • the information about the preamble Preamble is included, for example, the Preamble index.
  • the UE may determine the transmitted Preamble according to the related information of the Preamble code.
  • the time domain and/or frequency domain resources of the preamble Preamble ie, the time domain and/or the frequency domain resource used for transmitting the preamble
  • Time domain and/or frequency domain resources define a fixed time domain and/or frequency domain resource for the UE, or, by convention, define a time domain and/or frequency domain resource according to the LBT (ie, perform according to the LBT location or LBT)
  • LBT LBT location
  • one time domain and/or frequency domain resource or time domain and/or frequency domain resource set is configured, or a time domain and/or frequency domain resource candidate set for transmitting a Preamble code is predefined, or between the UE and the eNB.
  • a time domain and/or frequency domain resource or a time domain and/or a frequency domain resource set is agreed in advance, or a time domain and/or a frequency domain resource determined according to a correspondence between a UE ID and a time domain and/or a frequency domain resource.
  • a time domain information may also be included.
  • the subframe information is sent, that is, the UE sends the preamble Preamble code on the subframe corresponding to the time domain information.
  • the UE may preset the frequency domain information of the preamble Preamble, for example, preset a fixed frequency domain resource, or the UE and the eNB agree on a frequency domain resource in advance, or in the candidate frequency.
  • the domain resource set is randomly selected, or the candidate resource group is selected to have the smallest frequency domain resource index number, or the largest, or a fixed one, or, or, according to the correspondence between the UE ID and the frequency domain resource, the frequency is determined. Domain resource location.
  • the UE does not include preamble Preamble information and time domain and/or frequency domain resource information. That is, after receiving the foregoing notification signaling, the UE directly adopts the Preamble agreed by the UE and the eNB, and according to the previously agreed time domain and/or frequency domain resources, or according to the specific time domain and/or frequency domain after the LBT success time.
  • the Preamble code is sent to the eNB on the resource.
  • the specific time domain resource may be the first subframe or symbols or subframes immediately after the LBT success time, or the subframe or offset offset in the specific time window after the LBT failure on the current PRACH resource One or more symbols or sub-frames after the quantity.
  • Step 3 The UE sends a dedicated Preamble code to the evolved base station eNB.
  • the UE After receiving the foregoing notification signaling, the UE sends the preamble Preamble code on the time domain and/or the frequency domain resource of the corresponding Preamble code on the authorized carrier; or
  • the UE After receiving the foregoing notification signaling, the UE does not perform the LBT mechanism and/or the CCA detection process on the unlicensed carrier, but sends the preamble on the time domain and/or the frequency domain resource of the corresponding Preamble code according to the short control signaling SCS.
  • Preamble code The UE and the UE may predict or default which of the time domain and/or frequency domain resources may be used by the UE to transmit the preamble Preamble code. In this case, the time domain and/or the frequency domain resource that the UE can send the preamble Preamble code may not be occupied by the UE in the cell or the UE in the same carrier, so that the preamble code base station sent by the UE does not receive.
  • the base station indicates whether the UE can transmit the preamble Preamble code on each subframe or each candidate time domain and/or frequency domain resource, that is, the base station indicates the current subframe or current time of the UE.
  • the UE may send the preamble Preamble code directly on the subframe or the time domain and/or the frequency domain resource without performing LBT; or Using the base station and the UE to predict or default which subframes the UE can transmit the preamble Preamble code, and then, in combination with the signaling indication of the base station, determine which subframe or time domain and/or frequency domain resource to send the preamble Preamble code; or The UE that has successfully occupied the channel between the same cell or the same operator informs other UEs of the information about the interaction (such as the D2D technology), so that other UEs directly use the already occupied UE without performing the LBT. Transmitting its preamble Preamble code; or
  • the UE After receiving the notification signaling, the UE performs an LBT mechanism and/or CCA detection.
  • the LBT mechanism and/or the CCA detection process is completed before the eNB notifies, or, the higher layer signaling, or the pre-agreed time domain and/or frequency domain resources (ie, the first predetermined time domain and/or frequency domain resources described above) , can be normally sent in the corresponding eNB notification, or signaling (physical layer DCI or high-level RRC signaling), or pre-agreed time domain and / or frequency domain to send the corresponding eNB notification, or letter A notification (physical layer DCI or higher layer RRC signaling), or a pre-agreed preamble code.
  • the LBT mechanism and/or CCA detection is not completed before the eNB notifies, or the signaling (physical layer DCI or high-layer RRC signaling), or the pre-agreed time domain and/or frequency domain, it cannot be normal.
  • the specific time domain and/or frequency domain resources after performing the LBT mechanism and/or the CCA detection success time ie, the neighboring time domain and/or frequency domain resources after the successful time of performing the LBT mechanism and/or the CCA detection success)
  • Send a Preamble code Send a Preamble code.
  • the specific time domain resource may be the first subframe or symbols or subframes immediately after the LBT success time, or the subframe or offset offset in the specific time window after the LBT failure on the current PRACH resource One or more symbols or sub-frames after the quantity; or,
  • the UE starts performing the LBT mechanism and/or CCA detection before receiving the notification signaling. If the eNB notifies, or, the higher layer signaling, or the pre-agreed time domain and/or the frequency domain resource completes the LBT mechanism and/or the CCA detection process, the eNB may notify the corresponding eNB, or the higher layer signaling. Notification, or, in advance, in the time domain and/or frequency domain Send the corresponding eNB notification, or high-level signaling notification, or a pre-agreed preamble code.
  • the preamble Preamble code cannot be sent normally.
  • the Preamble code is transmitted on a specific time domain and/or frequency domain resource after the LBT mechanism and/or the CCA detection success time.
  • the specific time domain resource may be the first subframe or symbols or subframes immediately after the LBT success time, or the subframe or offset offset in the specific time window after the LBT failure on the current PRACH resource One or more symbols or subframes (third predetermined time domain and/or frequency domain resources);
  • the LBT mechanism and/or CCA performed on the UE side may include one of the following: LBT Cat4 (CWmax is recommended to be as small as possible), or LBT Cat2, or Enhanced LBT Cat2, or defer period+eCCA (detected channel busy) , no delay period, or, there is a delay period), or, eCCA process (detecting the channel is busy, including: no delay period, or, there is a delay period).
  • the UE transmits the Preamble preamble using LBT Cat2, or eCCA (eCCA is composed of N*slot, N is a positive integer not less than 1, preferably, N or the maximum contention window is 3, 4, 5, 6, 7 , 8, 9, 10, 11, 12, 13, 14, 15, slot time is 9us) and no delay period.
  • the eCCA with no delay period means that when the channel is detected to be busy in the slot duration, the defer period is not entered, but the channel busy judgment in the next slot duration is directly performed.
  • the defer period may be composed of 16 us+n*slot, preferably, n is 0, 1, 2.
  • the slot is 9us.
  • 16us consists of 9us+7us or 7us+9us.
  • the maximum contention window in the eCCA process is preferably 1, 2, 3, 4, 5, 6.
  • Step 4 The UE listens to the random access response corresponding to the dedicated Preamble code sent by the eNB.
  • the UE listens to the RAR sent by the eNB.
  • the CRC of the PDCCH in the RAR is scrambled or masked by the RA-RNTI, where the RA-RNTI is predefined, and the RA-RNTI is a time domain resource and a frequency domain resource location that are sent with the Preamble preamble.
  • definite where: for the last 6 PRACH frequency domain resources in one subframe of TDD, and for FDD, there may only be one PRACH frequency domain resource at a time. Further, when a large number of UEs transmit the Preamble preamble, and the frequency domain resources configured in one subframe are insufficient, the number of the frequency domain resources of the PRACH and the time domain resource range of the PRACH may be extended. Number.
  • RA-RNTI 1+t_id+10*f_id
  • the UE can obtain the RAR by listening to the RA-RNTI scrambled PDCCH.
  • the RA-RNTI is not necessarily determined.
  • the frequency domain resource is fixed, but the time domain resource may not be fixed. In this case, the UE may need to listen to the RA-RNTI scrambled PDCCH calculated by all possible time domain and/or frequency domain resources.
  • the PDSCH is decoded to obtain a TA value.
  • the random access is performed on the authorized carrier, that is, the preamble code is transmitted on the base station configuration or the agreed time domain and/or frequency domain resources according to the base station configuration or the prior agreement.
  • the Preamble code that the UE can successfully transmit on the base station configuration or the pre-agreed time domain and/or frequency domain resources depends entirely on whether the UE side can perform a successful LBT mechanism and/or The CCA detection, as well as the time domain and/or frequency domain resources for transmitting the Preamble preamble, are sufficient.
  • the base station or the UE when the base station or the UE transmits information on the unlicensed carrier, the base station or the UE needs to perform the LBT mechanism or the CCA detection first, and the LBT mechanism can adopt the implementation.
  • the base station or the UE may adopt a simplified LBT mechanism or parameter configuration for transmitting relevant information in the random access process, for example, an LBT Cat2 or a LBT Cat4 mechanism with a small contention window (the maximum contention window may be 1, 2, 3, 4, 5, etc.) or the eCCA process without defer period or the defer period+eCCA process without defer period.
  • the following embodiments will provide some options for increasing or increasing the transmission preamble Preamble code opportunity or increasing the transmission preamble Preamble code resource for the UE not failing to compete for the unlicensed carrier or performing the LBT failure condition before the corresponding time domain and/or frequency domain resources.
  • For the method see the examples below.
  • a method for transmitting a preamble Preamble code on an unlicensed carrier is provided, that is, at an eNB notification, or signaling, or a pre-agreed time domain and/or frequency domain resource or time.
  • the time domain resource ie, the first predetermined time domain and/or the frequency domain resource
  • K is preferably 1, 2, 3, and S is 2.
  • the method of transmitting the preamble Preamble code on the unlicensed carrier is as follows:
  • Method 1 Send a preamble Preamble code by short control signaling SCS.
  • the time domain and/or the frequency domain resource for transmitting the Preamble code may be an eNB notification, or signaling, or pre-agreed, or corresponding in a predetermined time domain and/or frequency domain resource set.
  • the resource index is the smallest, largest, or fixed resource index or randomly selected resource. For Method 1, the UE does not have to consider whether the channel is already occupied at the time of the current or at the time domain and/or frequency resource location.
  • the short control signaling SCS herein generally refers to a function of directly transmitting a short-time signal or channel without performing an LBT and/or an idle channel evaluation CCA detection on an unlicensed carrier.
  • Sending a signal or channel within the duration of the SCS the Licensed-Assisted Access (LAA) access point does not need to perform the LBT and/or the idle channel assessment CCA detection function, therefore, in order to guarantee non-authorization Friendly coexistence between different systems and devices on the carrier, and the duration of SCS transmission needs to meet certain regulatory requirements.
  • LAA Licensed-Assisted Access
  • some regions and countries may have other names and definitions for SCS, and some regions and countries may not define SCS.
  • the Preamble is transmitted in a format similar to format 4, and the symbol length is only two symbols per transmission, or may be shorter or longer than the length of the two symbols.
  • Method 2 Before transmitting the time domain and/or frequency domain resources of the Preamble code (ie, the first predetermined time domain and/or frequency domain resources described above), if the non-authorized carrier is contending, the time domain of the Preamble code may be sent. / or normal transmission on the frequency domain resources Preamble. If there is no contention to the unlicensed carrier, the Preamble is stopped from being sent on the time domain and/or the frequency domain resource of the Preamble code. Waiting for the next time domain and/or frequency domain resource (ie, the second predetermined time domain and/or frequency domain resource mentioned above) for transmitting the Preamble code, if the time domain and/or frequency domain resource of the next Preamble code is not yet competitive. To the unlicensed carrier, continue to stop sending.
  • the next time domain and/or frequency domain resource ie, the second predetermined time domain and/or frequency domain resource mentioned above
  • the time domain and/or frequency domain resource of the foregoing Preamble code may be a physical layer DCI notification or a high layer RRC signaling notification or predetermined.
  • the time domain and/or frequency domain resources in method 2 may be one or more of notification signaling or predefined time domain resources.
  • the frequency domain resources on different time domain resources may be the same or different, and may be obtained according to signaling or a predetermined manner.
  • the location of the LBT mechanism and/or CCA detection performed by transmitting the Preamble code on the PRACH time domain and/or the frequency domain resource may also be immediately before the time domain and/or frequency domain resource location where the Preamble code is transmitted.
  • the time domain and/or the frequency domain resource immediately adjacent to the Preamble code may be the last k symbols in the previous subframe, or the previous one or more subframes, or the LBT mechanism and/or the CCA detection is performed.
  • the location is not adjacent before the time domain and/or the frequency domain resource of the Preamble code is sent, for example, the time domain and/or the frequency domain resource after the LBT mechanism and/or the CCA detection is successful and the Preamble code is not sent (ie, A blank between the neighboring time domain and/or the frequency domain resource, the UE may send the PUSCH of the UE or send a reservation signal.
  • the reserved signal may be part of the entire bandwidth and has a certain frequency domain pattern, that is, the frequency domain resource outside the reserved signal frequency domain pattern is used for other UEs to perform LBT mechanism and/or CCA detection.
  • a specific frequency domain resource may be reserved on the PUSCH resource. To avoid waste of PUSCH resources, only a specific RE may be reserved for LBT mechanism and/or CCA detection of channel access by other UEs.
  • Method 3 Before the time domain and/or the frequency domain resource of the Preamble code is transmitted, if the non-authorized carrier is contending, the Preamble may be normally sent on the time domain and/or the frequency domain resource that sends the Preamble code. If there is no contention to the unlicensed carrier, the Preamble is stopped on the time domain and/or the frequency domain resource that sends the Preamble code, and the next time the content is subscribed to the unlicensed carrier, the supplementary transmission is performed, but the configured Preamble code is not required to be configured. On the time domain and / or frequency domain resources, it is sent irregularly.
  • a method of increasing or increasing the probability of successful transmission of a preamble Preamble code is provided.
  • the LBT mechanism and/or CCA detection must be used to obtain the unlicensed carrier's right to transmit
  • one of the following methods can be used:
  • Manner 1 Shorten the interval between the PRACH time domain resource (where the time domain and/or the frequency domain resource of the PRACH is the time domain and/or the frequency domain resource for transmitting the Preamble code) for transmitting the Preamble code, or, the period, or, PRACH time domain and / or frequency domain resource density.
  • the PRACH resource for transmitting the Preamble code on the authorized carrier or the unlicensed carrier is only one in each radio frame, for example, for the FDD system, a specific subframe in the even frame, such as the subframe index 1, or 4, Or, 7, shorten the period of the PRACH resource.
  • the UE may be triggered to perform the LBT mechanism and/or the CCA detection before the corresponding subframe index number in the next frame (the odd frame), if the LBT is performed before the current subframe (that is, the PRACH time domain resource)
  • the preamble Preamble code can be sent if the mechanism and/or CCA detection is successful.
  • the LBT mechanism and/or the CCA detection fails, the continuation of attempting to re-compete the unlicensed carrier before continuing the corresponding time domain subframe position in the next frame is performed in order to transmit the Preamble code.
  • the continuous attempt may be continued before the consecutive or discrete multiple subframes after the subframe 1 or 4 or 7 in the even frame.
  • the unlicensed carrier is contending to transmit the Preamble code.
  • the premise that the Preamble code can be transmitted is that the LBT mechanism and/or the CCA detection must be performed successfully before any one of the subframes.
  • the PRACH resource period can be shortened, that is, if there is a specific PRACH time domain resource in the first half of the radio frame, the interval at which the PRACH resource appears is shortened, that is,
  • the corresponding specific location in the second half of the radio frame may also be used as the PRACH time domain resource, and may not be limited to the existing TDD fixed uplink and downlink subframe configuration, and may be flexibly determined according to the new frame structure type.
  • the number of sub-frames or ratio are directly configured as the candidate PRACH resources of the UE.
  • the frequency domain resource location in the PRACH time domain resource that is supplemented with the Preamble code may be fixed relative to the frequency domain resource location in the PRACH time domain resource indicated by the predetermined or physical layer signaling or the high layer signaling, or can change. That is, the time domain resources for transmitting the Preamble code are different, but the frequency domain resource locations are different or the same.
  • the Preamble code transmission window (ie, the above time window) may be designed to increase the Preamble code transmission opportunity.
  • the Preamble code transmission window may be located before the preset or signaling (physical layer DCI or high layer RRC signaling) notification or the PRACH time domain resource previously agreed by the UE and the base station, or after, or included, or may be located in the LBT mechanism.
  • the CCA detects the time domain location before, or after, or, includes the LBT mechanism and/or the CCA detection time domain location.
  • the Preamble code transmission window (the PRACH time domain resource for transmitting the Preamble code in the window) and the preset or signaling (physical layer DCI or high layer RRC signaling) notify the PRACH time domain resource that the time domain domain may be continuous or in the time domain.
  • the time domain is not continuous.
  • the Preamble transmission window may be notified by preset or signaling (physical layer DCI or high layer RRC signaling) or PRACH time domain resources agreed by the UE and the base station in advance or from preset or signaling (physical layer DCI or higher layer) RRC signaling) notifies a period of time after which the Preamble code can be transmitted in a continuous segment after the PRACH time domain resource start position agreed by the UE and the base station.
  • the Preamble code transmission window may be one or more possible transmission time points of the Preamble code transmission (ie, the third predetermined time domain and/or frequency domain resources, or candidate time domain and/or frequency domain resources) within a certain period of time.
  • the time domain resource locations of multiple Preamble codes sent during the time period may be consecutive in the time domain or discontinuous in the time domain.
  • the time domain resource in the Preamble code transmission window that can transmit the Preamble code may be one or more resources consecutive in the time domain, or may be one or more resources discrete in the time domain.
  • the Preamble code transmission window after the current PRACH time domain resource may be used. Continue to try to send within. If the LBT mechanism and/or the CCA detection is successfully performed before the Preamble time domain resource is sent in the time window, the Preamble code is sent, and the next transmission opportunity needs to wait for preset or signaling (physical layer DCI or high layer RRC signaling) notification or The PRACH time domain resources agreed by the UE and the base station in advance.
  • the Preamble code is stopped, and the LBT mechanism and/or the time domain resource is executed before the next time the Preamble code is sent in the time window.
  • CCA detection try to resend the Preamble code. However, if there is no contention to the unlicensed carrier in the Preamble code transmission window, the Preamble fails to be sent in the Preamble window. If the LBT mechanism and/or the CCA detection fails, the next time the Preamble code is sent, the next preset or signaling (physical layer DCI or higher layer RRC signaling) notification or the PRACH time domain resources agreed by the UE and the base station are required.
  • the PRACH time domain and/or frequency domain resource is a resource for transmitting a preamble Preamble code.
  • the Preamble transmission is performed according to one of a PRACH resource or a PRACH resource set notified by the physical layer DCI or the upper layer RRC signaling.
  • the PRACH resource in the related art is randomly selected according to the equal probability in the available PRACH time domain resource set, but the premise that the Preamble code can be sent is that the LBT mechanism and/or the CCA detection succeeds, and the need to be limited to a certain extent
  • the randomness of the PRACH time domain resource, the PRACH time domain resource for sending the Preamble code can be determined by one of the following:
  • the time domain resource for transmitting the Preamble code is determined according to the indication manner of the base station.
  • the manner of transmitting the frequency domain resource of the Preamble code (that is, transmitting the frequency domain resource block corresponding to the Preamble code in the frequency domain) may be determined according to one of the following:
  • the frequency domain resource here is a frequency domain resource block index corresponding to the Preamble code sent in the frequency domain. For example, there are 5 resources in the frequency domain of a time domain resource that can be used to send Preamble, and the corresponding can be used to send There are five frequency domain indexes of the Preamble code, and it is assumed that the frequency domain resource index is the smallest, that is, the frequency domain resource index is 0 (ie, the first resource block in the resource), and the Preamble is sent on the resource block corresponding to the resource block.
  • a resource block in the frequency domain occupies 6 PRBs.
  • the attributes (upstream or downlink) of each subframe can be flexibly configured.
  • the PRACH channel may be located in each uplink subframe in the indicated uplink subframe, or an odd uplink subframe, or an even uplink subframe.
  • the frequency domain resource location for transmitting the Preamble preamble in the selected subframe may be as described above.
  • the time window for transmitting the Preamble code may be configured by at least one of the following parameters: a time domain offset of 1 (ie, the first time domain offset) (ie, the offset 1 is configured to transmit the Preamble code).
  • a time domain offset of 1 ie, the first time domain offset
  • the offset 1 is configured to transmit the Preamble code.
  • the size and number of the time domain resources in the window, the time window length, and the start of the time window that is, the time corresponding to the offset of the configured time domain resource after the Preamble code is sent
  • the Preamble code time domain is sent. Interval between resources.
  • the following example uses the start of the time window from the start of the time domain resource location corresponding to the configured transmit Preamble code, but the following method is also applicable to the start of the time window from the configured transmit Preamble.
  • the end of the time domain resource location corresponding to the code begins. That is, the time window location and the intra-window candidate PRACH time domain resource pattern may be triggered by the LBT mechanism and/or the CCA detection failure before the configured time domain resource location corresponding to the transmitted Preamble code, or may be triggered by the physical layer.
  • the DCI signaling is notified, or the upper layer RRC signaling is notified, or is pre-configured, or the base station and the UE agree in advance.
  • the send window of the Preamble code can be one of the following:
  • FIG. 5 is a schematic diagram of a PRACH resource in a time window for transmitting a Preamble code being temporally continuous according to an embodiment of the present invention, as shown in FIG. 5, that is, a start time of a Preamble code transmission time window is started from a current PRACH time domain resource, and a next PRACH is performed.
  • Time domain resources begin before.
  • the time window may be composed of a plurality of sending Preamble durations, and the duration of the Preamble duration may be one subframe, two subframes or three subframes, or several symbols.
  • the UE stops attempting to transmit a Preamble code.
  • the preset threshold may be predefined, or the base station and the UE agree in advance, or the physical layer signaling, or the high layer signaling, or the base station notifies the UE to acquire.
  • the Preamble code is normally sent on the PRACH time domain resource. If the UE does not compete for the unlicensed carrier before the current PRACH time domain resource, the UE may retry to compete for the unlicensed carrier before the candidate time domain resource for transmitting the Preamble code in the Preamble code time window, that is, the UE attempts to time. The LBT mechanism and/or CCA detection is continued before the next PRACH time domain resource in the window. If the right to use the unlicensed carrier is successfully contending, the UE sends the PRACH resource, that is, the Preamble code is supplemented.
  • the UE continues to try to continue to perform the LBT mechanism and/or CCA detection before the next PRACH time domain resource in the time window, if the LBT mechanism and/or the CCA detection succeeds, then The Preamble code is sent on the pre-PRACH resource. Conversely, if the LBT mechanism and/or the CCA detection fails, the LBT mechanism and/or CCA detection is attempted to continue to transmit the Preamble code on the candidate PRACH time domain resources in the time window until the time window ends. If the UE has not been able to contend for the unlicensed carrier within the current time window, then the retry is attempted within the next configured PRACH resource and/or time window.
  • the configured PRACH resource may be preset, or the physical layer signaling DCI, or the high layer RRC signaling notification is determined.
  • the PRACH time domain resource set is configured, the PRACH time domain resource selection method provided in this embodiment may be determined.
  • the time domain resource of the candidate Preamble code in the Preamble code transmission window is composed of a plurality of consecutive PRACH time domain resources in the time domain.
  • the other is that the PRACH resource in the Preamble code transmission window is discontinuous in the time domain.
  • the PRACH resources of the candidate to send the Preamble code may be equally spaced or unequal intervals.
  • FIG. 6 is a schematic diagram of a PRACH resource in a time window for transmitting a Preamble code being equally spaced in time according to an embodiment of the present invention. As shown in FIG. 6, the PRACH resources of the candidate transmitting Preamble code are equally spaced.
  • the Preamble code transmission time window may or may not include the configured PRACH time domain resource. In addition, the time window is similar to the method before the configured PRACH resource.
  • Case 1 As shown in FIG. 6, it is assumed that the configured PRACH resource is the first PRACH resource in the transmission time window, and if the UE contends to the unlicensed carrier on the configured PRACH time domain resource, the configured PRACH time domain resource
  • the Preamble code is normally sent, and the frequency domain resources may be randomly selected, or pre-defined, or fixedly determined, or the smallest, or largest, of the available frequency domain resource indexes. If there is no contention to the unlicensed carrier on the configured PRACH time domain resource, the UE attempts to send the Preamble code on the next PRACH time domain resource in the time window. If the next PRACH time domain resource is contending, the time domain resource is sent, and the frequency domain resource location may be unchanged or changed.
  • the Preamble code is stopped from being sent on the PRACH time domain resource.
  • the LBT mechanism and/or CCA detection is continued on the next PRACH resource in the time window, and the Preamble code is attempted to be sent until the time window ends. If the unlicensed carrier fails to compete in the time window, the UE can only wait for the next configured PRACH resource.
  • the PRACH time domain resources used to transmit the Preamble code in the time window are discrete in the time domain.
  • the LBT location performed by transmitting the Preamble code on the candidate PRACH time domain resource may be the last position (one or more symbols) in the previous subframe of the candidate PRACH time domain resource. For details, reference may also be made to the following description of the LBT or CCA detection location in the preferred embodiment 4.
  • the candidate Preamble code in the time window may also be composed of equally spaced PRACH time domain resource sizes, or unequal intervals of PRACH time domain resource sizes.
  • Case 2 The method for adding a Preamble code on a discrete PRACH resource in a time window further includes: adding a PRACH backup resource between the discrete candidate PRACH resources, FIG. 7 is a time window in a discrete PRACH resource according to an embodiment of the present invention. A schematic diagram of adding PRACH spare resources between them, as shown in FIG.
  • the configured PRACH time domain is After the resource, the time domain resource before the first candidate PRACH time domain resource in the time window continues to try to send the Preamble, if If the LBT mechanism is executed and/or the CCA detection is successful, the Preamble code is sent at the current time. Preferably, the opportunity to send the Preamble code is added to the first time domain resource after the configured PRACH.
  • the PRACH time domain resource may be additionally added after the transmission window, and the PRACH time domain resource may be additionally added after the Preamble transmission window according to the embodiment of the present invention.
  • FIG. 8 is an additional PRACH time domain resource after the Preamble transmission window according to the embodiment of the present invention.
  • the schematic diagram is shown in Figure 8.
  • the PRACH duration in the time window may be continuous or discontinuous.
  • the foregoing PRACH duration time domain resource may be 1, 2, 3 subframe lengths, or k OFDM symbol lengths.
  • the PRACH time domain resource for transmitting the Preamble code is determined according to the LBT mechanism and/or the CCA detection location.
  • the UE competes for the use right of the unlicensed carrier in the possible LBT mechanism and/or the CCA detection time domain location, and if it competes for the use right of the unlicensed carrier,
  • the Preamble code is transmitted on the k complete OFDM symbols after the LBT mechanism and/or the CCA detection succeeds, or one or more subframes. If the LBT mechanism and/or the CCA detection success time has not reached the symbol or subframe boundary, then a reserved signal or an occupied signal needs to be transmitted.
  • the transmission of the Preamble code is entirely dependent on the LBT mechanism and/or the CCA detection location.
  • the LBT mechanism and/or the CCA detection location are not limited, and the PRACH time domain resource for transmitting the Preamble code is determined according to the LBT or CCA success time.
  • the UE may start performing the LBT procedure at any time, and on the k complete OFDM symbols after the LBT mechanism and/or the CCA detection success time, or one or more subframes Send a Preamble code. If the LBT mechanism and/or the CCA detection success time has not reached the symbol or subframe boundary, then a reserved signal or an occupied signal needs to be transmitted.
  • the transmission of the Preamble code depends entirely on the LBT mechanism and/or the CCA detection start time and/or the success time, and is independent of the configured PRACH or available PRACH resources, or may be related (ie, after the LBT mechanism and/or the CCA detection succeeds) A time domain resource happens to be a PRACH resource).
  • the LBT contention window size or the LBT mechanism for transmitting the preamble Preamble code by the UE is adjusted according to whether the number of LBT failures performed by the preamble Preamble code reaches a preset threshold. For example, if the preset threshold is 3, if the UE continuously uses the LBT process with a maximum contention window of 15 to perform preamble Preamble code transmission, after the third LBT failure, the competition window used to execute the LBT is reduced immediately. 7.
  • the UE still fails to acquire the unlicensed carrier and transmits the preamble Preamble code, and then stops executing. LBT, until the next time domain and/or frequency domain resource of the preamble Preamble code, or time window.
  • the mechanism for performing LBT can be adjusted according to the number of LBT failures.
  • LBT Cat4 for example, defer period+eCCA process
  • eCCA process when the channel is detected busy
  • the LBT process cannot be completed before the time domain and/or the frequency domain location of the preamble Preamble code is sent, if the current N value meets the preset threshold, or the last CCA detection is idle, the transmission device may be deemed to be acquired. The right to use the unlicensed carrier.
  • the preset threshold may be indicated by the base station, or predefined, or agreed by the base station and the UE in advance. Way to get.
  • a location of the LBT mechanism and/or CCA detection performed by the preamble Preamble code is provided, and a cyclic prefix (Cyclic Prefix, CP for short) and a guard interval (Gap Time, GT for short) of the PRACH are provided.
  • Cyclic Prefix, CP for short Cyclic Prefix, CP for short
  • Gap Time, GT for short Guard interval
  • the PRACH channel occupies 1, 2, 2, and 3 subframes, respectively.
  • the PRACH channel is composed of a CP, a Preamble preamble, and a GT.
  • the CP is used to ensure that the receiver can perform frequency detection and resist inter-symbol interference.
  • the GT is used to avoid interference with other user equipment UEs.
  • the user equipment UE or the UE in the user equipment group performs the LBT mechanism and/or the CCA detection area is part or all of the UpPTS, or part of /all GP and / or UpPTS, or, part / all DwPTS and / or GP and / or UpPTS, or the last k symbols and / or DwPTS and / or GP and / or UpPTS in the downlink subframe, or, part or All UpPTS and / or some or all of the CP time, or some or all of the GP and / or UpPTS and / or part or all of the CP time, or, part or all of the DwPTS and / or GP and / or UpPTS and / or part or all CP time, or the last k symbols and/or DwPTS and/or GP and/or UpPTS
  • FIG. 9 is a schematic diagram of performing an LBT mechanism and/or a CCA detection location when transmitting a Preamble code in Format 0 to 3 according to an embodiment of the present invention, as shown in FIG. 9.
  • the CCA detection location limit may be the last k OFDM symbols of the previous subframe, or k OFDM symbols and/or current sub-frames.
  • PRACH subframe Some or all of the CPs in the frame (PRACH subframe), or some or all of the subframes before the PRACH subframe and/or some or all of the current subframes (PRACH subframes).
  • FIG. 10 is a schematic diagram of performing LBT mechanism and/or CCA detection position when transmitting Preamble code in Format 4 according to an embodiment of the present invention, as shown in FIG. Then, before the Preamble code in Format4 is sent on the resource corresponding to the unlicensed carrier, the location where the CCA detection is performed may be one of the following:
  • Some of the resource times in the above may be the time corresponding to x% of the time.
  • part of the CP time is the time corresponding to x% of the entire CP time
  • the starting point is the starting position of the CP area
  • the ending point is the point from the CP to the x time of the CP time.
  • x is the number between [0,100].
  • the frequency domain location of the LBT or CCA detection performed by the Preamble code may be detected on the entire bandwidth or detected on a part of the resource location on the entire bandwidth.
  • the partial resource may have a resource of a frequency domain pattern.
  • the resource may be a RE level, or a PRB, or an RBG, or a sub-band level.
  • the pattern composed of the resources corresponding to the odd resource index on the frequency domain resource is used by the user equipment to perform LBT or CCA detection on its corresponding resource.
  • PUSCH and/or GT and/or CP may be transmitted on the remaining resources. That is, when the GT and/or CP are in the frequency domain, they are transmitted according to a certain frequency domain pattern.
  • the LBT mechanism can be introduced by referring to the LBT mechanism in the first embodiment.
  • the LBT process may continue to be performed in the CP, or, in order to ensure that the symbols are not interfered, only one preset is detected in the CP. If the channel is idle during the CCA duration, the access right of the unlicensed carrier is obtained, so that the Preamble preamble is transmitted in the corresponding time domain and/or frequency domain location. At this time, the new CP length (truncated CP) is the original CP length minus the CCA duration time. In particular, for the case where CCA detection is performed within the GT, at this time, the new GT length is the original GT length minus the CCA start to GT boundary time.
  • the user equipment UE when the user equipment UE does not send the Preamble time domain resource location at the time of completing the LBT procedure, the user equipment UE needs to send a reservation signal or an occupation signal or an initial signal, for Other user equipment UEs identify.
  • the time domain length of the reserved signal or the occupied signal or the initial signal is: the LBT mechanism and/or the CCA detection success time to the start of the PRACH resource subframe; or the LBT mechanism and/or the CCA detection success time to the PRACH resource sub- Part or all of the CP in the frame; or, the LBT mechanism and/or CCA detects the success time to the subframe or symbol boundary.
  • the UE may send a PUSCH or PUCCH or SRS signal until the beginning of the PRACH resource subframe.
  • the reserved signal or the occupied signal or the initial signal may be transmitted in full bandwidth in the frequency domain or on some frequency domain resources in the entire bandwidth.
  • the part of the frequency domain resource may be a resource element (Resource Element, abbreviated as RE)/PRB/Resource Block Group (RBG)/subband resource in the frequency domain.
  • RE resource element
  • RBG Resource Block Group
  • UEs in the same carrier share the same reserved signal or occupied signal or initial signal pattern (or share the same LBT mechanism and/or CCA detection frequency domain pattern, that is, part or all of the frequency other than the reserved signal.
  • the user equipment UE ie, the UE to be multiplexed detects the channel idle on the LBT mechanism and/or the CCA detection resource except for part of the frequency domain resources (for example, in the LBT mechanism and/or CCA). If the channel energy detected on the resource corresponding to the pattern is less than the CCA threshold is A), then no other system exists in the channel.
  • the energy detected on the resource or the entire bandwidth if the received energy is less than the preset CCA detection threshold B (where the CCA detection thresholds A and B may be the same or different, that is, the CCA detection threshold B is greater than the CCA detection threshold A), or If it is greater than the CCA detection threshold A and less than the CCA detection threshold B, it is considered to be occupied by the UE of the same operator, that is, the usage right of the unlicensed carrier is considered to be multiplexed, that is, the resources can be reused together for the respective Preamble codes. send.
  • the time domain and/or frequency domain resources for transmitting the Preamble code may be different or the same.
  • the UEs in different cells of the same carrier may also have different reserved signals or occupied signals or initial signal patterns, that is, the CCA detection patterns of UEs of different cells are frequency-divided, if a channel is detected on the corresponding CCA detection pattern. If the user equipment is idle, the user equipment may send a reserved signal or a full bandwidth on the frequency domain resource outside the CCA detection pattern.
  • the detected UE or the UE to be multiplexed resources is in the corresponding reserved signal or occupied signal or
  • the initial signal pattern, or the entire bandwidth is received and parsed, if parsed (may be to receive and decode the reserved signal content, or only by the received energy to determine whether the channel is idle or whether it is occupied by the same cell or UE in the same carrier)
  • the UE may transmit its own Preamble code on the subsequent PRACH resource.
  • the frequency domain resource may also be composed of at least one of a reserved signal pattern and a CCA pattern and a vacant resource or a PUSCH resource.
  • the CCA pattern here is used for signal identification by other detected UEs for resource multiplexing.
  • the reserved signal or the occupied signal or the initial signal may carry an indication message, or a UE ID or a cell ID or an operator identifier, etc., and the reserved signal may also send an SRS sequence.
  • the reserved signal may also be a CP or a GT or a PUSCH or an SRS.
  • the UE performing LBT or CCA success may blankly send a reserved signal after the LBT or CCA success time and before transmitting the time domain resource of the Preamble code, and the reserved signal has a certain frequency domain pattern (for example, in a specific frequency domain position)
  • the reserved signal is sent on, and the specific resources in the spare frequency domain are used for other UEs to perform LBT or CCA detection).
  • the PUSCH is sent outside the frequency domain resource in the time domain resource in which the user equipment UE sends the Preamble code, where the PUSCH medium frequency domain can muting the specific resource for other UEs to perform LBT or CCA detection.
  • the particular resource may be a RE level, or a PRB, or an RBG, or a sub-band level.
  • the PUSCH or any information or signal is not transmitted only on a specific RE resource. It is also possible to reserve a specific resource on the frequency domain corresponding to the transmitting CP or GT for other UEs to perform LBT or CCA detection. If the energy channel energy is detected to be less than the CCA threshold of A on the frequency domain resource for performing LBT or CCA detection, then no other system exists in the channel. The detected energy outside the frequency domain resource corresponding to the LBT or the CCA or the entire bandwidth is less than the preset CCA detection threshold B (wherein the CCA detection thresholds A and B may be the same or different, optionally, the CCA detection threshold B is greater than the CCA.
  • the detection threshold is large, or greater than the CCA detection threshold A and less than the CCA detection threshold B, it is considered to be occupied by the same operator or the UE of the same cell, that is, the usage right of the unlicensed carrier is considered to be acquired.
  • different UEs may randomly or fixedly select different CCA detection starting positions to start CCA detection.
  • a new PRACH channel structure can be designed, and the PRACH can be shortened for the case where the LBT mechanism and/or the CCA detection and the PRACH coexist (ie, when one or more subframes or one or two or more symbols are coexisted)
  • the channel time domain length optionally, the frequency domain resources can be expanded and increased. That is, the LBT mechanism and/or the CCA detection and the PRACH time domain resources coexist in a time division manner. Alternatively, the LBT mechanism and/or the CCA detection and the PRACH time domain resources coexist in a frequency division manner.
  • the UE performing the LBT mechanism and/or the CCA detection succeeds in the PRACH resource (here, the PRACH time domain location may be the PRACH resource of the same subframe as the LBT success time.
  • the Preamble code may be sent using format4. Format), or a subframe after the LBT success time, preferably, a Preamble code is transmitted on the first or more subframes after the LBT success time, and the detected UE is on the frequency domain resource other than the PRACH resource.
  • the LBT mechanism and/or the CCA detection are performed on all resources, and if the channel is detected to be idle, the Preamble is transmitted on the next PRACH resource.
  • the frequency domain resource on the time domain resource of the PRACH may be composed of at least one of a PRACH frequency domain resource, a CCA detection frequency domain resource, a PUSCH, a reserved signal, and a blank, and the components are coexisted by frequency division.
  • a contention-based random access method on an unlicensed carrier is provided, and the contention-based random access procedure may be implemented in one of the following manners.
  • Step 1 Before the UE sends a message or transmits on the unlicensed carrier, it needs to perform LBT or idle channel evaluation CCA. If it contends to an unlicensed carrier, the UE proceeds to step 2. If there is no contention to the unlicensed carrier, the UE cannot transmit information on the unlicensed carrier. In a special case, the UE can obtain the unlicensed carrier usage right without performing the LBT mechanism and/or the CCA detection, and the short control signaling SCS mode is used for the message transmission.
  • Step 2 After competing for the unlicensed carrier, the UE sends the Msg1_1 message.
  • the Msg1_1 message includes an Msg1 message (the Msg1 message is mainly a Preamble code) and part of the information in the subsequent Msg3 message.
  • the UE sends the message contained in Msg1_1 on a specific time domain and/or frequency domain resource.
  • the UE may send an Msg1 message on one time domain and/or frequency resource, that is, transmit a preamble Preamble code on one time domain and/or frequency domain resource, and send a subsequent on another time domain and/or frequency domain resource. Part of the information in the Msg3 message.
  • the one time domain and/or frequency domain resource and the other time domain and/or frequency domain resource may be the same in the time domain, the frequency domain is different, or the time domain is different, the frequency domain is the same, or the time domain is different, and the frequency domain is different.
  • the UE may also send the content in the Msg1_1 on the same time domain and/or frequency domain resource.
  • the time domain and/or frequency domain resources for transmitting the Preamble code are obtained through physical layer signaling DCI, or high layer RRC signaling, or predefined, or obtained by the eNB and the UE in advance, or may be detected according to the LBT mechanism and/or CCA.
  • the success moment determines that the Preamble code is transmitted on the first available time domain and/or frequency domain resource after the LBT mechanism and/or the CCA detection success time.
  • the time domain resource may be one or more subframes, or k OFDM symbols.
  • the frequency domain resources account for L PRBs. Where k is a positive integer, preferably k is 2. L is any positive integer between [1, 100], and preferably L is 6.
  • the Preamble code has a correspondence with the TC-RNTI, or the UE ID corresponds to the Preamble code, or the UE ID corresponds to the TC-RNTI, or the UE ID and the Preamble code have a correspondence relationship with the TC-RNTI.
  • the Preamble code may be determined according to an existing rule, or predefined, or the eNB and the UE agree in advance, or a high layer RRC notification, or a Preamble code notified by the physical layer DCI.
  • the existing rule is determined according to the Msg3 message, the path loss, and the like.
  • the time domain and/or frequency domain resources of the sending part of the Msg3 message may be pre-defined, or the eNB and the UE agree in advance, or the eNB indicates, or the upper layer RRC notification, or the physical layer DCI notification, or, and the Preamble is sent.
  • the time domain resources of the code are the same, but there is an Offset offset in the frequency domain, or different from the time domain resource that sends the Preamble code (for example, an Offset1 offset in the time domain from the time domain resource that sends the Preamble code) Quantity), but the frequency domain can be the same, or different.
  • the time domain resource of the sending part Msg3 message is the same as the time domain resource of the Preamble code, and is offset by a certain Offset offset in the frequency domain, or the two resources are adjacent in the time domain, and the frequency domain may be used. The same location.
  • the Offset offset is at least a boundary for transmitting the Preamble code frequency domain resource to the available frequency domain region of the Preamble code.
  • the frequency domain resource of the transmitting part Msg3 message is a frequency domain resource other than the frequency domain resource available for transmitting the Preamble code.
  • the time domain and/or frequency domain resources of some Msg3 messages are not limited to the above time domain and/or frequency domain locations.
  • the partial message in Msg3 may be at least one of the following: UE ID, or C-RNTI, or RRC request, or SR, or BSR.
  • the UE sends a part of the message in the subsequent Msg3 on the time domain and/or the frequency domain resource that sends the Msg3.
  • the transport channel and/or the control channel adopts a TC-RNTI corresponding to the Preamble code, or the TC-RNTI configured by the eNB is scrambled or masked according to the eNB.
  • the TC-RNTI may be acquired by the eNB and the UE in advance, or may be configured/notified by the eNB through the authorized carrier, or configured/notified to the UE by the unlicensed carrier, or predefined, or the higher layer RRC signaling is notified to the eNB.
  • the UE acquires, or the physical layer DCI signaling is notified to the eNB and/or the UE, or is obtained by the MAC layer signaling.
  • the purpose of carrying a part of the Msg3 message in this step is that the use of the unlicensed carrier is based on the LBT mechanism and/or the CCA detection result, and has certain uncertainty. Therefore, once the usage right of the unlicensed carrier is acquired, the premise is as early as possible. Send some useful information, such as the required resource size, traffic size and other information, so that the eNB can allocate more suitable resources after receiving the message.
  • Step 3 After receiving the foregoing Preamble code and part of the Msg3 message, the eNB sends a response message to the UE.
  • the response message (eg, the RAR corresponding and/or the contention response message) includes at least one of the TA and the following message:
  • the TC-RNTI delivered by the eNB may be agreed with the UE in advance (such as the TC-RNTI used for scrambling in step 2), or the new TC-RNTI transmitted by the eNB for the UE.
  • Upstream authorization message The resources allocated in the uplink grant message can be used for the transmission of the remaining messages in Msg3.
  • the C-RNTI here is used to determine whether the UE is successful in the competition when the C-RNTI message is carried in step 2.
  • the eNB calculates the RA-RNTI according to the time domain and/or the frequency domain resource location of the received Preamble code, and then uses the RA-RNTI to scramble the CRC in the corresponding PDCCH in the RAR.
  • the eNB needs to receive the partial Msg3 information on the time domain and/or the frequency domain resource of the sending part of the Msg3 message, using a pre-defined, or the TC-RNTI corresponding to the UE ID, or the TC-RNTI corresponding to the Preamble sequence, Alternatively, the eNB and the TC-RNTI agreed by the UE in advance perform descrambling to obtain a partial Msg3 message.
  • the eNB sends a response message (eg, RAR and/or contention result), either through an authorized carrier or an unlicensed carrier.
  • a response message eg, RAR and/or contention result
  • the eNB needs to perform the LBT mechanism and/or the CCA detection first, and after successfully competing for the unlicensed carrier, the corresponding response message can be sent.
  • Step 4 The UE receives the response message sent by the eNB, and sends the remaining Msg3 on the resource corresponding to the corresponding UL grant.
  • the remaining Msg3 message can be regarded as a new Msg3 because the message content is different from the original. Message.
  • the UE performs PDCCH descrambling using its own RA-RNTI, and then decodes the PDSCH. If the obtained Preamble Index is consistent with its own Preamble, the reception is successful. Obtain messages such as TA, TC-RNTI, and UL grant.
  • the random access competition may be considered successful.
  • the UE may perform the new Msg3 message transmission scrambling by using the TC-RNTI in the response message sent by the eNB (ie, replacing the old TC-RNTI with the new TC-RNTI), or still adopting the TC in step 2.
  • - RNTI ie old TC-RNTI
  • the old TC-RNTI is obtained by the following method: pre-defined, or the TC-RNTI corresponding to the UE ID, or the TC-RNTI corresponding to the Preamble sequence, or the eNB and the UE agree in advance.
  • the remaining Msg3 message is transmitted on the resource allocated in the UL grant, for example, one of UE ID, SR, C-RNTI or RRC request, handover request, BSR, and the like.
  • Step 5 The eNB sends Msg4 according to the received new Msg3.
  • the eNB receives the new Msg3 message, and uses the replaced new TC-RNTI, or the old TC-RNTI (that is, the predefined, or the TC-RNTI corresponding to the UE ID, or the TC-RNTI corresponding to the Preamble sequence, or,
  • the eNB and the pre-agreed TC-RNTI of the UE perform descrambling, and carry the C-RNTI in the new Msg3, or the C-RNTI or the UE ID carried in the Msg1_1, or the TC-RNTI, in the Msg4 sent by the UE.
  • Step 6 The UE determines whether the random access is successful. That is, whether the success is determined by comparing the C-RNTI, and/or the TC-RNTI, and/or the UE ID in the Msg4.
  • Step 1 Before the UE sends a message on the unlicensed carrier, it needs to listen to the LBT or the idle channel to evaluate the CCA. If the contention to the unlicensed carrier is contending, the UE proceeds to step 2. If there is no contention to the unlicensed carrier usage right, the UE cannot perform information transmission on the unlicensed carrier. In a special case, the UE can obtain the unlicensed carrier usage right without performing the LBT mechanism and/or the CCA detection, and the short control signaling SCS mode is used for the message transmission.
  • Step 2 The UE sends the Msg1_M on the time domain and/or the frequency domain resource after the LBT mechanism and/or the CCA detection succeeds, where the Msg1_M includes: Msg1 and Msg3. That is to say, after the UE competes for the unlicensed carrier, the UE uses the one-step rule to transmit the preamble Preamble code together with the information in the Msg3.
  • the Msg1 message is used to send a Preamble code.
  • the Preamble code may correspond to the UE ID, or may be predefined, or may correspond to the TC-RNTI, or the eNB and the UE agree, or the signaling (physical layer signaling DCI or high layer RRC signaling) is notified.
  • the time domain and/or frequency domain resources for transmitting Msg1 can be DCI through physical layer signaling, or The upper layer RRC signaling, or, predefined, or the eNB and the UE agree in advance to obtain.
  • the Preamble code may also be sent according to the LBT mechanism and/or the CCA detection success time, that is, the LBT mechanism and/or the first available time domain and/or frequency domain resource after the CCA detection success time.
  • the time domain resource may be one or more subframes, or k OFDM symbols.
  • the frequency domain resources account for L PRBs. Where k is a positive integer, preferably k is 2. L is any positive integer between [1,
  • the Msg3 message includes at least one of the following: a UE ID, or a C-RNTI, or an RRC request, or a handover message, or an SR, or a BSR or the like.
  • the time domain and/or frequency domain resources for sending the Msg3 message may be predefined, or indicated by the eNB, or the upper layer RRC notification, or the physical layer DCI notification, or the same as the time domain resource for transmitting the Preamble code, but the frequency domain Implied an Offset offset, or different from the time domain resource that sends the Preamble code (for example, an Offset1 offset in the time domain from the time domain resource that sends the Preamble code), but the frequency domain can be the same. Or, different.
  • the time domain resource of the sending part Msg3 message is the same as the time domain resource of the Preamble code, and is offset by a certain Offset offset in the frequency domain, or the two resources are adjacent in the time domain, and the frequency domain may be used. The same location.
  • the Offset offset is at least a boundary for transmitting the Preamble code frequency domain resource to the available frequency domain region of the Preamble code.
  • the frequency domain resource that sends the Msg3 message is a frequency domain resource that is other than the frequency domain resource that is used to send the Preamble code
  • the time domain resource is the same as the time domain resource that sends the Preamble code, or is part of the time domain resource.
  • the time domain and/or frequency domain resources of the Msg3 message are not limited to the above time domain and/or frequency domain locations.
  • the corresponding transmission channel for transmitting the Msg3 message is scrambled by using the TC-RNTI.
  • the TC-RNTI may be predefined, or the TC-RNTI corresponding to the UE ID, or the TC-RNTI corresponding to the Preamble sequence, or the TC-RNTI agreed by the eNB and the UE in advance.
  • Step 3 After receiving the Msg1_M message, the eNB sends an Msg2_M message, that is, sends a response message, for example, the response message (eg, the RAR corresponding and/or the contention response message) includes at least one of the TA and the following message:
  • the response message eg, the RAR corresponding and/or the contention response message
  • the TC-RNTI can be used by the UE for the next random access.
  • Uplink grant (UL grant) message The uplink grant message may be used by the UE for the current use or the next random access.
  • the C-RNTI reports the content carried in the Msg1_M for the UE.
  • the UE ID is reported by the UE to be carried in the Msg1_M.
  • the CRC in the corresponding PDCCH in the corresponding RAR may be scrambled by the RA-RNTI.
  • step 3 the base station sends the response message on the authorized carrier or on the unlicensed carrier.
  • Step 4 The UE receives the foregoing response information sent by the eNB, and determines whether the random access is successful.
  • the UE may receive the response message between +k subframes after transmitting the Msg1_M message, where k is a positive integer, preferably k is 3, 4, 5,6,7,8,9, etc.
  • the UE decodes the response message on the time domain and/or frequency resource corresponding to the Preamble code and/or the corresponding control channel and/or the corresponding PDSCH channel, thereby acquiring the TA value, and the UL grant, the C-RNTI, and the UE ID. If the UE is successfully decoded, it may be determined whether the random access is successful by comparing the C-RNTI or the UE ID. If the decoded C-RNRI or UE ID is consistent with itself, the random access is successful.
  • the related preamble Preamble, or the related signaling or message sent by the base station or the UE side on the unlicensed carrier such as the preamble, the PDCCH order trigger signaling, the Msg1, the Msg2, part or all Msg3, Msg4, SRS or PUSCH, etc. need to be implemented after the LBT mechanism/free channel evaluation CCA, can be according to one of the following LBT mechanisms or processes: LBT Cat4 (including two: one is detected in the eCCA process The channel in the slot is busy and enters the defer period.
  • the other is that the channel is busy in the eCCA process and does not enter the defer period.); or, LBT Cat2, or enhanced LBT Cat2, or direct eCCA process (including Two types: one is that the channel is busy in the eCCA process and enters the defer period. The other is that the channel is busy in the eCCA process and does not enter the defer period.
  • the unlicensed carrier uplink and downlink transmission adopts the LBT Cat4 mechanism, and the contention window is large, for example, 7, 15, 31, 63, 127, 255, 511, 1023, etc., and the base station can perform the PDCCH order for transmitting the random access trigger signaling on the unlicensed carrier.
  • LBT Cat4 with a small competition window for example, the competition window can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.
  • a simplified LBT mechanism such as LBT Cat2).
  • the transmission device eg, eNB or UE
  • the transmission device detects that the channel is idle within the defer period, downlink transmission is possible. and / or,
  • the downlink or uplink transmission may be performed according to the following steps until the random backoff value N is decremented to zero.
  • Step1 Set the initial random backoff value N.
  • the random backoff value N may be a number uniformly generated between [0, CWp] or randomly generated by the binomial distribution, or may be a base station indicating an N value or a predefined N value.
  • CWp is a random number between CWmin and CWmax, where CWmin is a positive integer not less than 1, and CWmax is a maximum of 1024.
  • CWmax may be 1, 2, 3, 4, 5, 6, 7, 11, 15, 31, 63, 127, 255 or the like.
  • Step 2 Determine whether the current N value is greater than 0. If the result of the judgment N is greater than 0, the value of N is decremented by a certain number of operations.
  • the specific number can be a base station configuration, or, predefined.
  • Step 3 The device detects the channel idle condition in the slot. If the channel is detected to be idle in the slot, the process proceeds to Step 4. Conversely, if the channel is detected to be busy in the slot, go to Step 5. Or, instead of entering Step5, repeat Step3 directly.
  • Step 4 Determine whether the current N value is equal to 0. If it is equal to 0, stop channel detection and consider that the acquisition is not granted. The right to use the right carrier. Conversely, if N is not equal to 0, then go to Step 2.
  • Step 5 Detect the channel idle condition in the defer period. If the channel is detected to be idle during the defer period, then go to Step 2. Conversely, if the channel is detected to be busy during the defer period, Step 5 is repeated.
  • the defer period can have a fixed duration length plus n times the slot. n is a number greater than or equal to 0, and preferably n is 0, 1, 2, 3, and the like.
  • the slot length is 9us and the fixed duration is 16us.
  • the flow of LBT Cat2 is roughly as follows: the CCA detection start time can be fixed, or dynamically variable, or randomly selected within a certain interval within a certain interval, or within a certain interval within a certain interval. Configure a fixed location. If the detection channel is busy from idle, and the continuous detection channel idle time is not less than the preset CCA duration length, the use right of the unlicensed carrier is considered to be acquired.
  • the eNB sends the DCI to perform channel access using the LBT Cat2.
  • the CCA duration may be 16us+n*slot duration, and n is an integer greater than or equal to 0.
  • n is 1, 2, 3, and the like.
  • the slot length is 9us. That is, the CCA duration can be 16us, or 25us, 34us, etc., and can be 9us, or 4us.
  • the enhanced LBT Cat2 differs from the LBT Cat2 in that the starting point for CCA detection can be randomly selected over a certain period of time. It is advantageous for the fairness of the contention access channel between the asynchronous systems and the transmission equipment that causes the CCA detection starting point to compete for the access channel in advance. For example, suppose a certain time period is 10, which can be divided into 10 small segments, and each small segment occupies 1 copy. Then, the transmission device 1 can use the starting point of the third short segment of the 10 small segments as the starting point of its own CCA detection, and the transmission device 2 can be fixed. Configure the start of the 7th segment in the 10 segment as the starting point for your own CCA detection. That is, different transmission devices can randomly select the CCA detection starting point, and can also fixedly configure different starting positions.
  • the eCCA process is composed of N slot processes, and when the slot detects that the channel is busy, enters the defer period or does not enter the defer period.
  • N is a random backoff value, an integer randomly generated between [0, CWp], and an integer randomly generated by CWp between [CWmin, CWmax].
  • N may be indicated by the base station to the UE, or predefined.
  • N can be 1, 2, 3.
  • the maximum contention window CWmax can be a positive integer between [1, 63].
  • the specific eCCA process is:
  • Step 1 Generate a random backoff value N.
  • Step 2 Determine if the current N is greater than 0. If it is greater than 0, proceed to step 3. If it is equal to 0, it is considered that the unauthorized carrier usage right is obtained. At this time, if the UE has not performed slot detection yet, or does not enter the eCCA process, the random backoff value N needs to be reset, and the process proceeds to step 1.
  • Step 3 The transmission device detects whether the channel is idle in the slot. If the channel is idle, it proceeds to step 4. Or, if it is detected that the channel is busy, enter the defer period, that is, step 5, or directly enter the defer period, and directly repeat step 3.
  • Step 4 Perform an N value decrement by a certain number of value operations.
  • the certain number of values may be predefined, or indicated by the base station, or the base station and the UE agree in advance.
  • N N-1. Go to step 2.
  • Step 5 Detect whether the channel is idle in the defer period. If the evaluation channel is idle, proceed to step 4. If the detection channel is busy, repeat step 5.
  • the defer period is composed of 16us+n*slot, and n is an integer greater than or equal to 0, preferably, n It is 0, 1, 2, 3, etc.
  • the slot length is 9us.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.
  • a preamble transmitting and receiving device is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 11 is a structural block diagram of a preamble transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 11, the apparatus includes: a first determining module 112 and a first transmitting module 114, which will be described below.
  • the first determining module 112 is configured to determine a time domain and/or a frequency domain resource for transmitting the preamble on the unlicensed carrier; the first sending module 114 is connected to the first determining module 112, and is set to be in the determined time domain.
  • the preamble is sent on and/or on the frequency domain resource.
  • FIG. 12 is a block diagram of a preferred structure of the first sending module 114 in the preamble transmitting apparatus according to the embodiment of the present invention.
  • the first sending module 114 includes: a first sending unit 122, and the following A transmitting unit 122 will be described.
  • the first sending unit 122 is configured to send the preamble on the time domain and/or the frequency domain resource by using the short control signaling SCS.
  • FIG. 13 is a block diagram showing a preferred structure of the first determining module 112 in the preamble transmitting apparatus according to the embodiment of the present invention.
  • the first determining module 112 includes: a first determining unit 132, and the first The determination module 112 is described.
  • the first determining unit 132 is configured to perform at least one of the following operations:
  • the time domain and/or frequency domain resources for transmitting the preamble on the unlicensed carrier are determined according to the execution result of the LBT mechanism and/or the CCA detection.
  • FIG. 14 is a block diagram showing a preferred structure of the first determining unit 132 in the first determining module 112 in the preamble transmitting apparatus according to the embodiment of the present invention.
  • the first determining unit 132 includes one of the following: Sub-unit 142, second determining sub-unit 144, third determining sub-unit 146, fourth determining sub-unit 148, below the first determining unit 132 Be explained.
  • the first determining sub-unit 142 is configured to determine the first predetermined time domain if the execution result is that the LBT mechanism and/or the CCA detection is successful before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier is executed. And/or the frequency domain resource is a time domain and/or a frequency domain resource for transmitting the preamble; the second determining subunit 144 is configured to use the first predetermined time domain and/or on the unlicensed carrier in the execution result.
  • the LBT mechanism and/or the CCA detection fails before the frequency domain resource is performed, the LBT mechanism and/or the CCA detection are continuously performed on the unlicensed carrier, and when the LBT and/or CCA detection is successfully performed on the unlicensed carrier, Determining the adjacent time domain and/or frequency domain resource after the LBT and/or CCA detection success time is a time domain and/or frequency domain resource for transmitting the preamble; and the third determining subunit 146 is set to execute the result as In the case where the LBT mechanism and/or the CCA detection fails before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier, the second predetermined time domain of the unlicensed carrier and/or the second after the frequency domain resource Perform LBT mechanism and // before scheduling time domain and/or frequency domain resources Or detecting, by the CCA, and performing the LBT mechanism and/or the CCA detection succeeding before the second predetermined time domain and/or the frequency domain resource, determining that the second predetermined time domain and/or the frequency domain
  • FIG. 15 is a block diagram of a preferred structure of the first sending module 114 in the preamble transmitting apparatus according to the embodiment of the present invention.
  • the first sending module 114 includes: a second determining unit 152 and a second sending unit 154.
  • the first transmitting module 114 will be described below.
  • the second determining unit 152 is configured to determine, according to the determined time domain and/or the frequency domain resource, a fourth predetermined time domain and/or frequency domain resource for transmitting part or all of the content of the Msg3 message on the unlicensed carrier;
  • the sending unit 154 is connected to the foregoing second determining unit 152, configured to send a preamble on the determined time domain and/or frequency domain resource, and send the Msg3 message on the determined fourth predetermined time domain and/or frequency domain resource. Part or all of the content.
  • FIG. 16 is a block diagram showing the structure of a preamble receiving apparatus according to an embodiment of the present invention. As shown in FIG. 16, the apparatus includes a first receiving module 162 and a first processing module 164, which will be described below.
  • the first receiving module 162 is configured to receive a preamble sent by the user equipment UE on the time domain and/or the frequency domain resource on the unlicensed carrier; the first processing module 164 is connected to the first receiving module 162, and is configured as The received preamble performs random access processing to the UE.
  • FIG. 17 is a block diagram showing a preferred structure of a first receiving module 162 in a preamble receiving apparatus according to an embodiment of the present invention.
  • the first receiving module 162 includes: a first receiving unit 172, and the first The receiving unit 172 will be described.
  • the first receiving unit 172 is configured to receive a preamble sent by the UE on the time domain and/or the frequency domain resource on the unlicensed carrier by using the short control signaling SCS.
  • FIG. 18 is a block diagram showing a preferred structure of a first processing module 164 in a preamble receiving apparatus according to an embodiment of the present invention. As shown in FIG. 18, the first processing module 164 includes a second receiving unit 182, and the second receiving unit 182 is described below.
  • the second receiving unit 182 is configured to receive part or all of the content of the Msg3 message on the fourth predetermined time domain and/or the frequency domain resource on the unlicensed carrier, where the fourth predetermined time domain and/or the frequency domain resource includes the following At least one of: the same time domain and/or frequency domain resource in the time domain, offsetting the third offset time domain and/or frequency domain resources in the frequency domain; and the time domain and/or frequency domain resources Offset the fourth offset in the time domain, the same time domain and/or frequency domain resources in the frequency domain.
  • FIG. 19 is a block diagram showing a preferred structure of a preamble receiving apparatus according to an embodiment of the present invention. As shown in FIG. 19, the apparatus includes, in addition to all the structures shown in FIG. 16, a second transmitting module 192, which is The second transmitting module 192 is described.
  • the second sending module 192 is connected to the first receiving module 162, and is configured to send, to the UE, a time domain and/or a frequency domain resource and/or a fourth time domain and/or a frequency domain resource and/or a preamble. instruction.
  • FIG. 20 is a structural block diagram of a random access device 1 according to an embodiment of the present invention. As shown in FIG. 20, the device includes: an obtaining module 202 and a second processing module 204, which are described below.
  • the obtaining module 202 is configured to obtain the use right of the unlicensed carrier.
  • the second processing module 204 is connected to the obtaining module 202, and is configured to perform random access processing according to the unlicensed carrier that obtains the usage right.
  • FIG. 21 is a block diagram showing a preferred structure of the second processing module 204 in the random access device 1 according to the embodiment of the present invention.
  • the second processing module 204 includes: a first processing unit 212 or a second processing unit 214.
  • the second processing module 204 will be described below.
  • the first processing unit 212 is configured to send an Msg_1 message to the base station on the unlicensed carrier, where the Msg_1 message includes an Msg1 message carrying a preamble for performing random access and a partial Msg3 message carrying part of the content of the Msg3 message; a first response message sent by the base station according to the Msg_1 message; sending, according to the first response message, a remaining Msg3 message carrying the remaining content except the partial content of the Msg3 message to the base station; receiving the Msg4 message sent by the base station according to the remaining Msg3 message; according to the Msg4 The message determines whether the random access on the unlicensed carrier is successful; or
  • the second processing unit 214 is configured to send an Msg_M message to the base station on the unlicensed carrier, where the Msg_M message includes an Msg1 message carrying a preamble for performing random access and an Msg3 message carrying all contents of the Msg3 message;
  • the second response message sent by the Msg_M message is determined according to the second response message whether the random access on the unlicensed carrier is successful.
  • the first processing unit 212 is further configured to send a partial Msg3 message, and the transmission channel and/or the control channel of the sending part Msg3 message is scrambled by using the first temporary cell radio network temporary identifier TC-RNTI; or, the second processing The unit 214 is further configured to scramble the transmission channel and/or the control channel for transmitting the Msg3 message by using the first temporary cell radio network temporary identifier TC-RNTI before transmitting the Msg3 message.
  • the first processing unit 212 is further configured to perform scrambling on the transport channel and/or the control channel for transmitting the remaining Msg3 message by using the first TC-RNTI or the second TC-RNTI.
  • FIG. 22 is a structural block diagram of a random access device 2 according to an embodiment of the present invention. As shown in FIG. 22, the device includes: a second determining module 222 and a third processing module 224, which are described below.
  • the second determining module 222 is configured to determine an unlicensed carrier that the user equipment UE contends; the third processing module 224 is connected to the second determining module 222, and is configured to perform random access processing of the UE according to the determined unlicensed carrier.
  • FIG. 23 is a block diagram showing a preferred structure of the third processing module 224 in the random access device 2 according to the embodiment of the present invention.
  • the third processing module 224 includes: a third processing unit 232 or a fourth processing unit 234.
  • the third processing module 224 will be described below.
  • the third processing unit 232 is configured to receive, by the UE, an Msg_1 message, where the Msg_1 message includes an Msg1 message carrying a preamble for performing random access and a partial Msg3 message carrying part of the content of the Msg3 message;
  • the Msg_1 message sends a first response message to the UE, and receives a remaining Msg3 message that is sent by the UE according to the first response message and carries the remaining content except the partial content of the Msg3 message; and sends an Msg4 message to the UE according to the remaining Msg3 message, where Msg4 The message is used by the UE to determine whether the random access on the unlicensed carrier is successful; or
  • the fourth processing unit 234 is configured to receive the Msg_M message sent by the UE on the unlicensed carrier, where the Msg_M message includes the Msg1 message carrying the preamble for performing random access and the Msg3 message carrying all the contents of the Msg3 message; according to the Msg_M The message sends a second response message to the UE, where the second response message is used by the UE to determine whether the random access on the unlicensed carrier is successful.
  • the third processing unit 232 is further configured to: send a first response message to the UE on the authorized carrier; or perform an LBT mechanism and/or an idle channel assessment CCA detection on the unlicensed carrier, and The first response message is sent on the time domain and/or frequency domain resources that are contending after performing the LBT mechanism and/or the CCA detection succeeds.
  • the third processing unit 232 is further configured to: after receiving the partial Msg3 message, descramble the partial Msg3 message by using the first temporary cell radio network temporary identifier TC-RNTI; or, the fourth processing unit 234, It is further arranged to descramble the Msg3 message with the first temporary cell radio network temporary identifier TC-RNTI after receiving the Msg3 message.
  • the third processing unit 232 is further configured to: when the first response message carries the second TC-RNTI, and if the remaining Msg3 message is received, adopt the first TC-RNTI or the received remaining Msg3 message or The second TC-RNTI performs descrambling.
  • FIG. 24 is a structural block diagram of a user equipment UE according to an embodiment of the present invention. As shown in FIG. 24, the UE 240 includes the preamble transmitting apparatus 242 of any one of the above, and/or the random access apparatus of any one of the above. 244.
  • the base station 250 includes the preamble receiving device 252 of any of the above, and/or the random access device 254 of any of the above.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the storage medium is further arranged to store program code for performing the following steps:
  • Sending the preamble on the determined time domain and/or the frequency domain resource comprises: sending the preamble on the time domain and/or the frequency domain resource by using the short control signaling SCS.
  • the storage medium is further arranged to store program code for performing the following steps:
  • Determining the time domain and/or frequency domain resources used to transmit the preamble on the unlicensed carrier includes:
  • the storage medium is further arranged to store program code for performing the following steps:
  • Determining the time domain and/or frequency domain resources for transmitting the preamble on the unlicensed carrier according to the execution result of performing the LBT mechanism and/or the CCA detection includes one of the following:
  • the execution result is that the LBT mechanism and/or the CCA detection is successful before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier is performed, determining that the first predetermined time domain and/or the frequency domain resource is a time domain and/or frequency domain resource for transmitting a preamble;
  • the execution result is that the LBT mechanism and/or the CCA detection fails before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier
  • determining that the second predetermined time domain and/or the frequency domain resource is a time domain and/or a frequency domain resource for transmitting the preamble
  • the time for supplementing the transmitting preamble on the unlicensed carrier is used.
  • the frequency domain resource is a time domain and/or a frequency domain resource used to transmit the preamble.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the region before the frequency domain resource includes one of the following: the first predetermined time a special subframe before the domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource; the first predetermined time domain and/or the frequency domain resource or An uplink subframe before the second predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource; the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or A preamble subframe before the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the area for performing the LBT mechanism and/or the CCA detection includes at least one of: before the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and If the area before the frequency domain resource is the uplink pilot time slot UpPTS of the special subframe, the area for performing the LBT mechanism and/or the CCA detection includes at least one of the following: partial/all UpPTS; partial/all protection Time slot GP and / or UpPTS; part / all DwPTS and / or GP and / or UpPTS; last k symbols and / or DwPTS and / or GP and / or UpPTS in the downlink subframe; part / all UpPTS and / or part /all CP
  • the storage medium is further arranged to store program code for performing the following steps:
  • the area for performing the LBT mechanism and/or the CCA detection includes at least one of: before the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and And the area before the frequency domain resource is an uplink subframe, and the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the frequency domain resource
  • the region for performing the LBT mechanism and/or CCA detection includes at least one of: a partial/all GT time of the PRACH of the previous subframe; the previous one Partial/all GT time of the PRACH of the subframe and/or the first predetermined time domain and
  • the storage medium is further arranged to store program code for performing the following steps:
  • the first predetermined time domain and/or the frequency domain resource and/or the second predetermined time domain resource and/or the third predetermined time domain resource are determined by at least one of: determining by a manner in which the base station allocates the user equipment UE; Determined by means of physical layer signaling; determined by means of high-level signaling; determined by the way the base station negotiates with the UE; determined by the way the system is pre-configured by the UE.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the multiple neighboring time domain and/or frequency domain resources are time domain and/or frequency domain resources that are consecutive in the time domain, or Discrete time domain and/or frequency domain resources on the domain; in the case where the second predetermined time domain and/or frequency domain resources are multiple, the plurality of second time domain and/or frequency domain resources are in the time domain Continuous time domain and/or frequency domain resources, or discrete time domain and/or frequency domain resources in the time domain; in the case where a plurality of third time domain and/or frequency domain resources are included in the time window, the multiple The third time domain and/or frequency domain resources are consecutive time domain and/or frequency domain resources in the time domain, or discrete time domain and/or frequency domain resources in the time domain.
  • the storage medium is further arranged to store program code for performing the following steps:
  • time domain and/or frequency domain resources include one of the following: a time domain and/or a frequency domain resource that are equally spaced in the time domain and have different resource block sizes; a time domain that is equally spaced in the time domain and has the same resource block size and/or Or a frequency domain resource; a time domain and/or a frequency domain resource that are unequal intervals in the time domain and have different resource block sizes; time domain and/or frequency domain resources that are not equally spaced in the time domain and have the same resource block size.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the first predetermined time domain and/or frequency domain resource is K subframes in the time domain, or N OFDM symbols, where K, N is an integer greater than or equal to 1.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the time window may be located after the first predetermined time domain and/or the frequency domain resource, or before the first predetermined time domain and/or the frequency domain resource, or includes the first predetermined time domain and/or the frequency domain resource.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the third predetermined time domain and/or frequency domain resource in the time window is determined by the following parameter: a first offset used to identify an offset distance between the first predetermined time domain and/or the frequency domain resource and the start of the time window. a second offset for identifying a third predetermined time domain and/or an offset distance between the frequency domain resource and the start of the time window for transmitting the preamble in the time window; a third predetermined time domain and/or The size of the frequency domain resource; the number of third predetermined time domain and/or frequency domain resources; the window length of the time window; the interval between the third predetermined time domain and/or frequency domain resources.
  • the storage medium is further arranged to store program code for performing the following steps:
  • Transmitting the preamble on the determined time domain and/or frequency domain resources includes:
  • the storage medium is further arranged to store program code for performing the following steps:
  • the fourth predetermined time domain and/or frequency domain resource includes at least one of the following: the same time domain and/or frequency domain resource in the time domain, offsetting the time domain of the third offset in the frequency domain and/or Or a frequency domain resource; offsetting the fourth offset from the time domain and/or the frequency domain resource in the time domain, and the same time domain and/or frequency domain resource in the frequency domain.
  • Embodiments of the present invention also provide another storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • S2 Perform random access processing on the UE according to the received preamble.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the preamble transmitted by the receiving UE on the time domain and/or the frequency domain resource on the unlicensed carrier includes:
  • the storage medium is further arranged to store program code for performing the following steps:
  • Performing random access processing on the UE according to the received preamble includes:
  • the fourth predetermined time domain and/or the frequency domain resource includes at least one of the following:
  • the domain and/or frequency domain resources are the same in the time domain, offsetting the third offset time domain and/or frequency domain resources in the frequency domain; offsetting the time domain and/or frequency domain resources in the time domain Four offsets, the same time domain and/or frequency domain resources in the frequency domain.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the method Before receiving the preamble sent by the UE on the time domain and/or the frequency domain resource on the unlicensed carrier, the method further includes: sending, to the UE, the time domain and/or the frequency domain resource and/or the fourth time domain. And/or instructions for frequency domain resources and/or preambles.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • S2 Perform random access processing according to the unlicensed carrier that obtains the usage right.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the random access processing according to the obtained unlicensed carrier includes:
  • Msg_1 message sending an Msg_1 message to the base station on the unlicensed carrier, where the Msg_1 message includes an Msg1 message carrying a preamble for performing random access and a partial Msg3 message carrying part of the content of the Msg3 message; the receiving base station sends the message according to the Msg_1 message. a first response message; sending, according to the first response message, a remaining Msg3 message carrying the remaining content of the Msg3 message except the partial content; receiving the Msg4 message sent by the base station according to the remaining Msg3 message; determining the unlicensed carrier according to the Msg4 message Whether the random access is successful; or,
  • Msg_M message sending an Msg_M message to the base station on the unlicensed carrier, where the Msg_M message includes an Msg1 message carrying a preamble for performing random access and an Msg3 message carrying all contents of the Msg3 message; and the second sending by the receiving base station according to the Msg_M message
  • the response message is determined according to the second response message whether the random access on the unlicensed carrier is successful.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the time domain and/or frequency domain resource used to send the Msg1 message is the same as or different from the time domain and/or frequency domain resource used to send the partial Msg3 message; or
  • the time domain and/or frequency domain resource used to send the Msg1 message is the same as or different from the time domain and/or frequency domain resource used to send the Msg3 message.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the content of the S1, Msg3 message includes at least one of the following: a user equipment identifier UE ID, a cell radio network temporary identifier C-RNTI, a radio resource control RRC request, an SR, and a BSR.
  • the storage medium is further arranged to store program code for performing the following steps:
  • Sending a partial Msg3 message and/or an Msg3 message further comprising: scrambling a transport channel and/or a control channel for transmitting a partial Msg3 message and/or an Msg3 message by using a first temporary cell radio network temporary identifier TC-RNTI .
  • the storage medium is further arranged to store program code for performing the following steps:
  • the TC-RNTI is obtained by at least one of the following correspondences: a correspondence between the TC-RNTI and the preamble, a correspondence between the TC-RNTI and the UE ID, and a relationship between the TC-RNTI and the preamble and the UE ID. Correspondence relationship; or,
  • the TC-RNTI is obtained by at least one of the following manners: the method is obtained by the base station and the UE, and is obtained by means of the base station notifying or configuring the UE, and is obtained by means of the high-level signaling notification, and is notified by the physical layer signaling.
  • the acquisition is obtained by means of media access control MAC layer signaling.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the first response message carries at least one of the following information: a second TC-RNTI, an uplink grant information, a preamble index, and a C-RNTI.
  • the storage medium is further arranged to store program code for performing the following steps:
  • Sending the remaining Msg3 message further includes: scrambling the first TC-RNTI or the second TC-RNTI by using the first TC-RNTI or the second TC-RNTI for transmitting the remaining Msg3 message.
  • Embodiments of the present invention also provide another storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the storage medium is further arranged to store program code for performing the following steps:
  • Performing random access processing of the UE according to the determined unlicensed carrier includes:
  • the receiving UE sends an Msg_1 message on the unlicensed carrier, where the Msg_1 message includes an Msg1 message carrying a preamble for performing random access and/or a partial Msg3 message carrying part of the content of the Msg3 message; and the UE is based on the Msg_1 message.
  • Sending a first response message receiving, by the UE according to the first response message, a remaining Msg3 message carrying the remaining content except the partial content of the Msg3 message; sending an Msg4 message to the UE according to the remaining Msg3 message, where the Msg4 message is used for the UE Determining whether the random access on the unlicensed carrier is successful; or
  • the Msg_M message sent by the UE is received on the unlicensed carrier, where the Msg_M message includes an Msg1 message carrying a preamble for performing random access and/or an Msg3 message carrying all contents of the Msg3 message; and sending the message to the UE according to the Msg_M message. And a second response message, where the second response message is used by the UE to determine whether the random access on the unlicensed carrier is successful.
  • the storage medium is further arranged to store program code for performing the following steps:
  • Sending the first response message to the UE based on the Msg_1 message includes:
  • the storage medium is further arranged to store program code for performing the following steps:
  • the method further includes: performing descrambling on the part of the Msg3 message and/or the Msg3 message by using the first temporary cell radio network temporary identifier TC-RNTI.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the foregoing storage medium may include, but is not limited to, a U disk, a read only memory (ROM, Read-Only Memory), Random Access Memory (RAM), removable hard disk, disk or optical disk, etc., which can store program code.
  • ROM read only memory
  • RAM Random Access Memory
  • removable hard disk disk or optical disk, etc., which can store program code.
  • the processor performs, according to the stored program code in the storage medium, determining a time domain and/or a frequency domain resource for transmitting the preamble on the unlicensed carrier; and determining the time domain and/or Or send a preamble on the frequency domain resource.
  • the processor performs, according to the stored program code in the storage medium: transmitting the preamble on the determined time domain and/or the frequency domain resource, including: by using short control signaling, SCS, in the time domain.
  • the preamble is sent on and/or on the frequency domain resource.
  • the processor performs, according to the stored program code in the storage medium, determining that the time domain and/or the frequency domain resource for transmitting the preamble on the unlicensed carrier comprises: performing on the unlicensed carrier. After listening, the LBT mechanism and/or the idle channel are evaluated for CCA detection; and the time domain and/or frequency domain resources for transmitting the preamble on the unlicensed carrier are determined according to the execution result of the LBT mechanism and/or the CCA detection.
  • the processor performs, according to the stored program code in the storage medium, determining a time domain for transmitting the preamble on the unlicensed carrier according to the execution result of performing the LBT mechanism and/or the CCA detection.
  • the frequency domain resource includes one of the following: determining the first predetermined time in the case where the execution result is that the LBT mechanism and/or the CCA detection is successful before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier
  • the domain and/or frequency domain resources are time domain and/or frequency domain resources for transmitting the preamble; performing the LBT mechanism and/or before performing the first predetermined time domain and/or frequency domain resources on the unlicensed carrier
  • the CCA detection fails, the LBT mechanism and/or CCA detection is continued on the unlicensed carrier, and the LBT and/or CCA detection success time is determined when the LBT and/or CCA detection is successful on the unlicensed carrier.
  • the subsequent neighboring time domain and/or frequency domain resources are time domain and/or frequency domain resources for transmitting the preamble; before the execution result is the first predetermined time domain and/or frequency domain resources on the unlicensed carrier LBT mechanism and / or CCA detection failure Performing an LBT mechanism and/or CCA detection before the first predetermined time domain of the unlicensed carrier and/or the second predetermined time domain and/or the frequency domain resource after the frequency domain resource, and in the second predetermined time domain and/or Or performing the LBT mechanism and/or the CCA detection succeeding before the frequency domain resource is performed, determining that the second predetermined time domain and/or the frequency domain resource is a time domain and/or a frequency domain resource used for transmitting the preamble; In the case where the LBT mechanism and/or the CCA detection fails before the first predetermined time domain and/or the frequency domain resource on the unlicensed carrier, the LBT mechanism is executed in the time window for supplementing the transmission preamble on the unlicensed carrier and / or CCA detection, and in the
  • the processor executes, according to the stored program code in the storage medium: the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource before or third.
  • the area before the predetermined time domain and/or the frequency domain resource includes one of: a first predetermined time domain and/or a frequency domain resource or a second predetermined time domain and/or a frequency domain resource before or a third predetermined time domain and/or a special subframe before the frequency domain resource; a first predetermined time domain and/or a frequency domain resource or an uplink subframe before the second predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource a first predetermined time domain and/or a frequency domain resource or a preamble subframe before the second predetermined time domain and/or the frequency domain resource or before the third predetermined time domain and/or the frequency domain resource.
  • the processor performs, according to the stored program code in the storage medium, before or in the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource.
  • the area before the predetermined time domain and/or the frequency domain resource is a special subframe
  • the area for performing the LBT mechanism and/or the CCA detection includes at least one of the following: a predetermined time domain and/or frequency domain resource or a second predetermined time domain and/or a frequency domain resource before or a third predetermined time domain and/or a region before the frequency domain resource is an uplink subframe time slot UpPTS of the special subframe.
  • the area for performing the LBT mechanism and/or CCA detection includes at least one of: partial/all UpPTS; partial/all guard time slots GP and/or UpPTS; partial/all DwPTS and/or GP and/or UpPTS ; last k symbols and/or DwPTS and/or GP and/or UpPTS in the downlink subframe; partial/all UpPTS and/or partial/all CP time; partial/all GP and/or UpPTS and/or partial/all CP Time; partial/all DwPTS and/or GP and/or UpPTS and/or partial/all CP time; last k symbols and/or DwPTS and/or GP and/or UpPTS and/or partial/all CPs in the downlink subframe Time; a guard slot of a special subframe before the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource or the third predetermined time domain and/or the frequency domain resource.
  • the processor performs, according to the stored program code in the storage medium, before or in the first predetermined time domain and/or the frequency domain resource or the second predetermined time domain and/or the frequency domain resource.
  • the area for performing the LBT mechanism and/or the CCA detection includes at least one of: in the first predetermined time domain and/or the frequency domain The resource or the second predetermined time domain and/or the frequency domain resource before or the third predetermined time domain and/or the region before the frequency domain resource is an uplink subframe, and the first predetermined time domain and/or frequency domain resource or second reservation
  • An area for performing LBT mechanism and/or CCA detection in the case where the time domain and/or the frequency domain resource or the previous predetermined time domain and/or the previous subframe of the frequency domain resource has a physical random access channel PRACH channel At least one of the following: a partial/all GT time of the PRACH of the previous subframe; a partial/
  • the processor executes, according to the stored program code in the storage medium: the first predetermined time domain and/or the frequency domain resource and/or the second predetermined time domain resource and/or the third predetermined time
  • the domain resource is determined by at least one of the following manners: determined by a manner in which the base station allocates the user equipment UE; determined by a manner notified by the physical layer; determined by a manner of high-level signaling notification; determined by a manner negotiated by the base station and the UE; The system is determined in a manner that the UE is pre-configured.
  • the processor performs, according to the stored program code in the storage medium, in a case that the neighboring time domain and/or the frequency domain resource are multiple, the multiple adjacent time domains and/or frequencies
  • the domain resource is a time domain and/or a frequency domain resource that is continuous in the time domain, or a time domain and/or a frequency domain resource that is discrete in the time domain; and the second predetermined time domain and/or frequency domain resource is multiple.
  • the plurality of second time domain and/or frequency domain resources are time domain and/or frequency domain resources that are consecutive in the time domain, or time domain and/or frequency domain resources that are discrete in the time domain;
  • the window includes a plurality of third time domain and/or frequency domain resources
  • the plurality of third times The domain and/or frequency domain resources are consecutive time domain and/or frequency domain resources in the time domain, or discrete time domain and/or frequency domain resources in the time domain.
  • the processor performs, according to the stored program code in the storage medium: multiple adjacent time domain and/or frequency domain resources, or multiple second predetermined time domain and/or frequency domain resources.
  • the plurality of third time domain and/or frequency domain resources are time domain and/or frequency domain resources that are discrete in the time domain, including one of the following: a time domain with equal intervals in the time domain and different resource block sizes / or frequency domain resources; time domain and / or frequency domain resources with equal time interval and same resource block size; time domain and / or frequency domain resources with unequal intervals and resource block sizes in the time domain; time domain Time domain and/or frequency domain resources with unequal intervals and the same resource block size.
  • the processor performs, according to the stored program code in the storage medium, that the first predetermined time domain and/or the frequency domain resource is K subframes in the time domain, or N OFDM symbols, where , K, N is an integer greater than or equal to 1.
  • the processor executes according to the stored program code in the storage medium: the time window may be located after the first predetermined time domain and/or the frequency domain resource, or in the first predetermined time domain and/or Or the first predetermined time domain and/or frequency domain resources are included before or in the frequency domain resource.
  • the processor executes, according to the stored program code in the storage medium: the third predetermined time domain and/or the frequency domain resource in the time window is determined by: determining the first predetermined time a first offset of the offset distance between the domain and/or the frequency domain resource and the start of the time window; a third predetermined time domain and/or frequency domain resource and time window starting point for identifying the preamble in the time window a second offset between the offset distances; a size of the third predetermined time domain and/or frequency domain resources; a number of third predetermined time domains and/or frequency domain resources; a window length of the time window; a third predetermined The interval between time domain and/or frequency domain resources.
  • the processor performs, according to the stored program code in the storage medium, that sending the preamble on the determined time domain and/or the frequency domain resource comprises: determining the time domain and/or the frequency domain according to the determined time domain and/or the frequency domain. a resource, determining a fourth predetermined time domain and/or frequency domain resource for transmitting part or all of the content of the Msg3 message on the unlicensed carrier; transmitting the preamble on the determined time domain and/or frequency domain resource, and determining Part or all of the content of the Msg3 message is sent on the fourth predetermined time domain and/or frequency domain resource.
  • the processor executes according to the stored program code in the storage medium: the fourth predetermined time domain and/or the frequency domain resource includes at least one of: with the time domain and/or the frequency domain resource.
  • the same time domain offsetting the time domain and/or frequency domain resources of the third offset in the frequency domain; offsetting the fourth offset from the time domain and/or the frequency domain resource in the time domain, in the frequency domain Same time domain and/or frequency domain resources.
  • the processor performs: receiving, according to the stored program code in the storage medium, a preamble sent by the user equipment UE on a time domain and/or a frequency domain resource on the unlicensed carrier; The preamble performs random access processing for the UE.
  • the processor performs, according to the stored program code in the storage medium, that receiving the preamble sent by the UE on the time domain and/or the frequency domain resource on the unlicensed carrier comprises: receiving the UE through the short Control signaling SCS, a preamble transmitted on time and/or frequency domain resources on an unlicensed carrier.
  • the processor performs, according to the stored program code in the storage medium: performing random access processing on the UE according to the received preamble includes: a fourth predetermined time domain sum on the unlicensed carrier / or receiving on frequency domain resources Part or all of the Msg3 message, wherein the fourth predetermined time domain and/or frequency domain resource comprises at least one of the following: the same time domain and/or frequency domain resource in the time domain, and the third offset in the frequency domain Offset time domain and/or frequency domain resources; offset from the time domain and/or frequency domain resources by a fourth offset in the time domain, the same time domain and/or frequency domain resources in the frequency domain.
  • the processor performs, according to the stored program code in the storage medium, before receiving the preamble sent by the UE on the time domain and/or the frequency domain resource on the unlicensed carrier, the method further includes: Instructions for determining time domain and/or frequency domain resources and/or fourth time domain and/or frequency domain resources and/or preambles are transmitted to the UE.
  • the processor performs: acquiring the usage right of the unlicensed carrier according to the stored program code in the storage medium; performing random access processing according to the unlicensed carrier that obtains the usage right.
  • the processor performs, according to the stored program code in the storage medium, performing random access processing according to the obtained unlicensed carrier, including: sending an Msg_1 message to the base station on the unlicensed carrier, where The Msg_1 message includes an Msg1 message carrying a preamble for performing random access and/or a partial Msg3 message carrying part of the content of the Msg3 message; receiving a first response message sent by the base station according to the Msg_1 message; and transmitting to the base station according to the first response message Carrying the remaining Msg3 message of the remaining content except the partial content of the Msg3 message; receiving the Msg4 message sent by the base station according to the remaining Msg3 message; determining whether the random access on the unlicensed carrier is successful according to the Msg4 message; or, in the unauthorized Sending an Msg_M message to the base station on the carrier, where the Msg_M message includes an Msg1 message carrying a preamble for
  • the processor performs, according to the stored program code in the storage medium, a time domain and/or a frequency domain resource for transmitting the Msg1 message and a time domain for transmitting the partial Msg3 message and/or
  • the frequency domain resources are the same or different; or the time domain and/or frequency domain resources used to transmit the Msg1 message are the same as or different from the time domain and/or frequency domain resources used to send the Msg3 message.
  • the processor performs, according to the stored program code in the storage medium, the content of the Msg3 message includes at least one of the following: the user equipment identifier UE ID, the cell radio network temporary identifier C-RNTI, and the wireless Resource Control RRC Request, SR, BSR.
  • the processor executes, according to the stored program code in the storage medium, the sending part Msg3 message and/or the Msg3 message, and further includes: transmitting the part for transmitting the Msg3 message and/or the Msg3 message.
  • the channel and/or control channel is scrambled using the first temporary cell radio network temporary identity TC-RNTI.
  • the processor performs, according to the stored program code in the storage medium, the TC-RNTI is obtained by using at least one of the following correspondences: a correspondence between the TC-RNTI and the preamble, the TC-RNTI Corresponding relationship between the TC-RNTI and the preamble and the UE ID; or the TC-RNTI is obtained by at least one of the following manners: obtaining by the base station and the UE, and notifying by the base station
  • the method of obtaining the UE is obtained by means of the high-level signaling notification, obtained by means of the physical layer signaling, and obtained by the medium access control MAC layer signaling notification.
  • the processor executes: the first response message according to the stored program code in the storage medium. Carrying at least one of the following information: a second TC-RNTI, an uplink grant information, a preamble index, and a C-RNTI.
  • the processor performs: sending the remaining Msg3 message according to the stored program code in the storage medium, further comprising: adopting the first TC for the transport channel and/or the control channel used to send the remaining Msg3 message. - RNTI or second TC-RNTI for scrambling.
  • the processor performs: determining, according to the stored program code in the storage medium, an unlicensed carrier that the user equipment UE contends; performing random access processing of the UE according to the determined unlicensed carrier.
  • the processor performs, according to the stored program code in the storage medium, performing random access processing of the UE according to the determined unlicensed carrier, including: receiving, by the UE, an Msg_1 message on the unlicensed carrier, where The Msg_1 message includes a Msg1 message carrying a preamble for performing random access and a partial Msg3 message carrying part of the content of the Msg3 message; transmitting a first response message to the UE based on the Msg_1 message; and receiving the carrying of the UE according to the first response message There is a remaining Msg3 message of the remaining content of the Msg3 message except for part of the content; the Msg4 message is sent to the UE according to the remaining Msg3 message, wherein the Msg4 message is used by the UE to determine whether the random access on the unlicensed carrier is successful; or Receiving, by the unlicensed carrier, the Msg_M message sent by the UE, where the Msg
  • the processor is executed according to the stored program code in the storage medium: sending the first response message to the UE based on the Msg_1 message includes: sending the first response message to the UE on the authorized carrier; or The LBT mechanism and/or the idle channel evaluation CCA detection is performed on the unlicensed carrier, and the first response message is sent on the time domain and/or the frequency domain resource that is contending after performing the LBT mechanism and/or the CCA detection succeeds.
  • the processor performs, according to the stored program code in the storage medium, after receiving the partial Msg3 message and/or the Msg3 message, further comprising: adopting the first part of the Msg3 message and/or the Msg3 message.
  • a temporary cell radio network temporarily identifies the TC-RNTI for descrambling.
  • the processor performs, according to the stored program code in the storage medium, in the case that the first response message carries the second TC-RNTI, and the remaining Msg3 message is received, the received The remaining Msg3 message is descrambled by using the first TC-RNTI or the second TC-RNTI.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the preamble sending and receiving method, the device, the user equipment, and the base station provided by the embodiments of the present invention have the following beneficial effects: the problem that the random access process on the unlicensed carrier cannot be implemented in the related art is solved. In turn, the effect of being able to successfully perform random access on an unlicensed carrier is achieved.

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Abstract

本发明提供了一种前导码发送、接收方法、装置、用户设备及基站，其中，该方法包括：确定非授权载波上用于发送前导码的时频域资源；在确定的该时频域资源上发送所述前导码，通过本发明，解决了相关技术中无法实现在非授权载波上进行随机接入过程的问题，进而达到了能够成功在非授权载波上进行随机接入的效果。

Description

前导码发送、接收方法、装置、用户设备及基站 技术领域
本发明涉及通信领域，具体而言，涉及一种前导码发送、接收、随机接入处理方法、装置、用户设备及基站。
背景技术
随着数据业务的快速增长，授权频谱的载波上承受的数据传输压力也越来越大，因此，通过非授权频谱的载波来分担授权载波中的数据流量成为后续长期演进(Long Term Evolution，简称为LTE)发展的一个重要的演进方向。
非授权频谱具有的特征是：非授权频谱不需要购买，频谱资源零成本，具有免费/低费用的特征；个人、企业都可以参与部署，设备商的设备可以任意部署，具有准入要求低，成本低的特征；非授权频谱中的5GHz、2.4GHz等频段都可以使用，具有可用带宽大的特征；非授权载波具有共享资源的特征，即多个不同系统都在其中运营时或者同一系统的不同运营商在其中运营时，可以考虑一些共享资源的方式提高频谱利用效率，等等。
LTE系统的Rel-13版本于2014年9月份开始立项研究，其中一项重要的研究议题就是LTE系统使用非授权频谱的载波工作。这项技术将使得LTE系统能够使用目前存在的非授权频谱的载波，大大提升LTE系统的潜在频谱资源，使得LTE系统能够获得更低的频谱成本。
在LTE系统中，随机接入是一个基本的功能，UE只能通过随机接入过程，与系统的上行同步以后，才能够被系统调度来进行上行的传输。LTE中的随机接入分为基于竞争的随机接入和基于非竞争的随机接入两种形式。
基于竞争的随机接入过程，可分为四个步骤：
(1)UE发送前导码(Preamble)，UE随机选择一个可用的Preamble进行发送。
(2)eNB发送随机接入响应(Random Access Response，简称为RAR)。当基站检测到UE发送的Preamble前导序列，就会在下行同步信道(Downlink Synchronization Channel，简称为DL-SCH)上发送一个响应(检测到的Preamble前导序列索引，用于上行同步的时间调整信息，初始的上行资源分配(用于发送Msg3消息))，以及一个临时小区无线网络标识(Temporary Cell Radio Network Tempory Identity，简称为TC-RNTI)，以此TC-RNTI将在步骤四中决定是否转换为正式的小区无线网络临时标识(Cell Radio Network Temporary Identifier，简称为C-RNTI)。UE需要在PDCCH上使用随机接入无线网络临时标识RA-RNTI(Random Access RNTI)来监听RAR消息。
(3)UE发送Msg3消息。UE接收到RAR消息，获得上行的时间同步和上行资源。但此时并不能确定RAR消息是发送给UE自己而不是发送给其他的UE的。由于UE的前导序 列是从公共资源中随机选取的。因此，存在着不同的UE在相同的时间-频率资源上发送相同的接入前导序列的可能性，这样，他们就会通过相同的RA-RNTI接收到同样的RAR。而且，UE也无从知道是否有其他的UE在使用相同的资源进行随机接入。为此UE需要通过随后的Msg3消息和Msg4消息消息，来解决这样的随机接入冲突。
(4)eNB发送Msg4消息，即冲突解决消息。如果在媒体接入控制-冲突解决定时器(mac-ContentionResolutionTimer)时间内，UE接收到eNB返回的Msg4消息，并且其中携带的UE ID与自己在Msg3消息中上报给eNB的相符，那么UE就认为自己赢得了此次的随机接入冲突，随机接入成功。并将在RAR消息中得到的TC-RNTI置为自己的C-RNTI。否则的话，UE认为此次接入失败，并按照上面所述的规则进行随机接入的重传过程。
对于无竞争的随机接入，UE发送的Preamble是eNB通知的，通过前两步来完成上行同步，没有解决冲突的过程。
然而在相关技术中，无法实现在非授权载波上进行随机接入过程。
发明内容
本发明提供了一种前导码发送、接收方法、装置、用户设备及基站，以至少解决相关技术中无法实现在非授权载波上进行随机接入过程的问题。
根据本发明的一个方面，提供了一种前导码发送方法，包括：确定用于发送前导码的时域和/或频域资源；在确定的所述时域和/或频域资源上发送所述前导码。
优选地，在确定的所述时域和/或频域资源上发送所述前导码包括：通过短控制信令SCS，在所述时域和/或频域资源上发送所述前导码。
优选地，确定用于发送所述前导码的所述时域和/或频域资源包括以下至少之一：依据预定义的方式，确定用于发送所述前导码的所述时域和/或频域资源；依据物理层下行控制信息DCI信令，确定用于发送所述前导码的所述时域和/或频域资源；依据高层无线资源控制RRC信令，确定用于发送所述前导码的所述时域和/或频域资源；依据先听后说LBT机制和/或空闲信道评估CCA检测的执行结果，确定用于发送所述前导码的所述时域和/或频域资源。
优选地，依据执行所述LBT机制和/或所述CCA检测的所述执行结果，确定用于发送所述前导码的所述时域和/或频域资源包括以下之一：在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第一预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，继续执行所述LBT机制和/或CCA检测，在执行所述LBT和/或CCA检测成功的情况下，确定所述LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在所述第一预定时域和/或频域资源之后的第二预定时域和/或频域资 源前执行所述LBT机制和/或所述CCA检测，并在所述第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第二预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在用于发送所述前导码的时间窗内执行所述LBT机制和/或所述CCA检测，并在所述时间窗内的第三预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第三预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源。
优选地，所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域包括以下之一：所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的特殊子帧；所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的上行子帧；所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的前导码子帧。
优选地，在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述特殊子帧的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述特殊子帧的上行导频时隙UpPTS的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：部分/全部UpPTS；部分/全部保护时隙GP和/或UpPTS；部分/全部DwPTS和/或GP和/或UpPTS；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS；部分/全部UpPTS和/或部分/全部CP时间；部分/全部GP和/或UpPTS和/或部分/全部CP时间；部分/全部DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述特殊子帧的保护时隙GP的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：部分/全部GP时间；部分/全部GP和/或部分/全部CP时间；部分/全部下行导频时隙DwPTS和/或GP和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或部分/全部CP时间。
优选地，在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述上行子帧的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为上行子帧，并且所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源的前一个子帧存在物理随机接入信道PRACH信道的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：所述前一个子帧的PRACH的部分/全部GT时间；所述前一个子帧的PRACH的部分/全部GT时间和/或所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源 所在当前PRACH子帧的部分或全部CP时间；在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为上行子帧，并且所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源的前一个子帧无PRACH信道的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：所述前一个子帧的最后k个正交频分复用OFDM符号内；所述前一个子帧的最后k个正交频分复用OFDM符号和/或所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源所在当前PRACH子帧的部分/全部CP时间。
优选地，所述第一预定时域和/或频域资源、所述第二预定时域和/或频域资源、所述第三预定时域和/或频域资源、LBT/CCA或CP或GT或PRACH资源的起始位置或时长或结束位置，中的至少之一通过以下方式至少之一确定：由基站为用户设备UE分配的方式确定；由物理层信令通知的方式确定；由高层信令通知的方式确定；由基站与所述UE协商的方式确定；由系统为所述UE预先配置的方式确定。
优选地，在所述邻近时域和/或频域资源为多个的情况下，该多个邻近时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；和/或，在所述第二预定时域和/或频域资源为多个的情况下，该多个第二时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；和/或，在所述时间窗内包括多个第三时域和/或频域资源的情况下，该多个第三时域和/或频域资源为时域上连续的时域和/或频域资源，或者时域上离散的时域和/或频域资源。
优选地，所述多个邻近时域和/或频域资源、或者，所述多个第二预定时域和/或频域资源、或者，所述多个第三时域和/或频域资源为在时域上离散的时域和/或频域资源包括以下之一：时域上等间隔且资源块大小不等的时域和/或频域资源；时域上等间隔且资源块大小相同的时域和/或频域资源；时域上不等间隔且资源块大小不等的时域和/或频域资源；时域上不等间隔且资源块大小相同的时域和/或频域资源。
优选地，所述第一预定时域和/或频域资源在时域上为K个子帧，或者N个OFDM符号，其中，K，N为大于或等于1的整数。
优选地，所述时间窗可以位于所述第一预定时域和/或频域资源之后、或者，位于所述第一预定时域和/或频域资源之前、或者，包含所述第一预定时域和/或频域资源。
优选地，所述时间窗中的所述第三预定时域和/或频域资源通过以下参数确定：用于标识所述第一预定时域和/或频域资源与所述时间窗起点之间偏移距离的第一偏移量；用于标识所述时间窗内用于发送所述前导码的第三预定时域和/或频域资源与所述时间窗起点之间的偏移距离的第二偏移量；所述第三预定时域和/或频域资源的大小；所述第三预定时域和/或频域资源的数目；所述时间窗的窗长；所述第三预定时域和/或频域资源间的间隔。
优选地，在确定的所述时域和/或频域资源上发送所述前导码包括：根据确定的所述时域和/或频域资源，确定用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源； 在确定的所述时域和/或频域资源上发送所述前导码，和在确定的所述第四预定时域和/或频域资源上发送所述Msg3消息的部分或全部内容。
优选地，所述第四预定时域和/或频域资源包括以下至少之一：与所述时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与所述时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
根据本发明的另一方面，提供了一种前导码接收方法，包括：接收用户设备UE在时域和/或频域资源上发送的前导码；依据接收的所述前导码执行对所述UE的随机接入处理。
优选地，接收所述UE在所述时域和/或频域资源上发送的所述前导码包括：接收所述UE通过短控制信令SCS，在所述时域和/或频域资源上发送的所述前导码。
优选地，依据接收的所述前导码执行对所述UE的随机接入处理包括：在第四预定时域和/或频域资源上接收所述Msg3消息的部分或全部内容，其中，所述第四预定时域和/或频域资源包括以下至少之一：与所述时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与所述时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
优选地，在接收所述UE在所述时域和/或频域资源上发送的所述前导码之前，还包括：向所述UE发送用于确定所述时域和/或频域资源和/或所述第四时域和/或频域资源和/或所述前导码的指令。
根据本发明的一方面，提供了一种随机接入方法，包括：获取载波的使用权；依据获取到使用权的载波进行随机接入处理。
优选地，依据获取到的所述载波进行随机接入处理包括：在所述载波上向基站发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；接收所述基站根据所述Msg_1消息发送的第一响应消息；根据所述第一响应消息向所述基站发送携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；接收所述基站依据所述剩余Msg3消息发送的Msg4消息；依据所述Msg4消息确定在所述载波上进行随机接入是否成功；或者，在所述载波上向基站发送Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；接收所述基站根据所述Msg_M消息发送的第二响应消息；依据所述第二响应消息确定在所述载波上进行随机接入是否成功。
优选地，用于发送所述Msg1消息的时域和/或频域资源与用于发送所述部分Msg3消息的时域和/或频域资源相同或者不同；或者，用于发送所述Msg1消息的时域和/或频域资源与用于发送所述Msg3消息的时域和/或频域资源相同或者不同。
优选地，所述Msg3消息的部分内容包括以下至少之一：用户设备标识UE ID，小区无线网络临时标识C-RNTI，无线资源控制RRC请求，调度请求SR，缓冲区状态报告BSR。
优选地，发送所述部分Msg3消息和/或所述Msg3消息，还包括：对用于发送所述部分Msg3消息和/或所述Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
优选地，所述TC-RNTI通过以下对应关系至少之一获取：TC-RNTI与前导码之间的对应关系，TC-RNTI与UE ID之间的对应关系，TC-RNTI与前导码和UE ID之间的对应关系；或者，所述TC-RNTI通过以下方式至少之一获取：通过基站与UE约定的方式获取，通过由基站通知或配置UE的方式获取，通过高层信令通知的方式获取，通过物理层信令通知的方式获取，通过媒体接入控制MAC层信令通知的方式获取。
优选地，所述第一响应消息携带有以下信息至少之一：第二TC-RNTI，上行授权信息，前导码索引，C-RNTI，时间提前量TA。
优选地，发送所述剩余Msg3消息，还包括：对用于发送所述剩余Msg3消息的传输信道和/或控制信道采用所述第一TC-RNTI或者所述第二TC-RNTI进行加扰。
根据本发明的一方面，提供了一种随机接入方法，包括：确定用户设备UE竞争到的非授权载波；依据确定的所述非授权载波执行UE的随机接入处理。
优选地，依据确定的所述非授权载波执行UE的随机接入处理包括：在所述非授权载波上接收所述UE发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；基于所述Msg_1消息向所述UE发送第一响应消息；接收所述UE根据所述第一响应消息发送的携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；依据所述剩余Msg3消息向所述UE发送Msg4消息，其中，所述Msg4消息用于所述UE确定在所述非授权载波上进行随机接入是否成功；或者，在所述非授权载波上接收所述UE发送的Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；根据所述Msg_M消息向所述UE发送第二响应消息，其中，所述第二响应消息用于所述UE确定在所述非授权载波上进行随机接入是否成功。
优选地，基于所述Msg_1消息向所述UE发送所述第一响应消息包括：在授权载波上向所述UE发送所述第一响应消息；或者，在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行所述LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送所述第一响应消息。
优选地，在接收到所述部分Msg3消息和/或所述Msg3消息之后，还包括：对所述部分Msg3消息和/或所述Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
优选地，在所述第一响应消息携带有第二TC-RNTI，以及接收到所述剩余Msg3消息的情况下，对接收到的所述剩余Msg3消息采用所述第一TC-RNTI或者所述第二TC-RNTI进行解扰。
根据本发明的另一方面，提供了一种前导码发送装置，包括：第一确定模块，设置为确 定用于发送前导码的时域和/或频域资源；第一发送模块，设置为在确定的所述时域和/或频域资源上发送所述前导码。
优选地，所述第一发送模块包括：第一发送单元，设置为通过短控制信令SCS，在所述时域和/或频域资源上发送所述前导码。
优选地，所述第一确定模块包括第一确定单元，所述第一确定单元设置为执行以下操作至少之一：依据预定义的方式，确定用于发送所述前导码的所述时域和/或频域资源；依据物理层下行控制信息DCI信令，确定用于发送所述前导码的所述时域和/或频域资源；依据高层无线资源控制RRC信令，确定用于发送所述前导码的所述时域和/或频域资源；用于依据先听后说LBT机制和/或空闲信道评估CCA检测的执行结果，确定用于发送所述前导码的所述时域和/或频域资源。
优选地，在依据所述LBT机制和/或所述CCA检测的执行结果，确定用于发送所述前导码的所述时域和/或频域资源时，所述第一确定单元包括以下之一：第一确定子单元，设置为在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第一预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；第二确定子单元，设置为在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，继续执行所述LBT机制和/或CCA检测，在执行所述LBT和/或CCA检测成功的情况下，确定所述LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；第三确定子单元，设置为在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在所述第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测，并在所述第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第二预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；第四确定子单元，设置为在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在用于发送所述前导码的时间窗内执行所述LBT机制和/或所述CCA检测，并在所述时间窗内的第三预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第三预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源。
优选地，所述第一发送模块包括：第二确定单元，设置为根据确定的所述时域和/或频域资源，确定用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；第二发送单元，设置为在确定的所述时域和/或频域资源上发送所述前导码，和在确定的所述第四预定时域和/或频域资源上发送所述Msg3消息的部分或全部内容。
根据本发明的另一方面，提供了一种前导码接收装置，包括：第一接收模块，设置为接收用户设备UE在时域和/或频域资源上发送的前导码；第一处理模块，设置为依据接收的所述前导码执行对所述UE的随机接入处理。
优选地，所述第一接收模块包括：第一接收单元，设置为接收所述UE通过短控制信令 SCS，在所述时域和/或频域资源上发送的所述前导码。
优选地，所述第一处理模块包括：第二接收单元，设置为在第四预定时域和/或频域资源上接收所述Msg3消息的部分或全部内容，其中，所述第四预定时域和/或频域资源包括以下至少之一：与所述时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与所述时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
优选地，该装置还包括：第二发送模块，设置为向所述UE发送用于确定所述时域和/或频域资源和/或所述第四时域和/或频域资源和/或所述前导码的指令。
根据本发明的另一方面，提供了一种随机接入装置，包括：获取模块，设置为获取载波的使用权；第二处理模块，设置为依据获取到使用权的载波进行随机接入处理。
优选地，所述第二处理模块包括：第一处理单元，设置为在所述载波上向基站发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；接收所述基站根据所述Msg_1消息发送的第一响应消息；根据所述第一响应消息向所述基站发送携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；接收所述基站依据所述剩余Msg3消息发送的Msg4消息；依据所述Msg4消息确定在所述载波上进行随机接入是否成功；或者，第二处理单元，设置为在所述载波上向基站发送Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；接收所述基站根据所述Msg_M消息发送的第二响应消息；依据所述第二响应消息确定在所述载波上进行随机接入是否成功。
优选地，所述第一处理单元，还设置为发送所述部分Msg3消息，对发送所述部分Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰；或者，所述第二处理单元，还设置为在发送所述Msg3消息之前，对发送所述Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
优选地，所述第一处理单元，还设置为发送所述剩余Msg3消息，对用于发送所述剩余Msg3消息的传输信道和/或控制信道采用所述第一TC-RNTI或者所述第二TC-RNTI进行加扰。
根据本发明的还一方面，提供了一种随机接入装置，包括：第二确定模块，设置为确定用户设备UE竞争到的非授权载波；第三处理模块，设置为依据确定的所述非授权载波执行UE的随机接入处理。
优选地，所述第三处理模块包括：第三处理单元，设置为在所述非授权载波上接收所述UE发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；基于所述Msg_1消息向所述UE发送第一响应消息；接收所述UE根据所述第一响应消息发送的携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；依据所述剩余Msg3消息向所述UE发送Msg4消息， 其中，所述Msg4消息用于所述UE确定在所述非授权载波上进行随机接入是否成功；或者，第四处理单元，设置为在所述非授权载波上接收所述UE发送的Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；根据所述Msg_M消息向所述UE发送第二响应消息，其中，所述第二响应消息用于所述UE确定在所述非授权载波上进行随机接入是否成功。
优选地，所述第三处理单元，还设置为：在授权载波上向所述UE发送所述第一响应消息；或者，在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行所述LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送所述第一响应消息。
优选地，所述第三处理单元，还设置为在接收到所述部分Msg3消息之后，对所述部分Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰；或者，所述第四处理单元，还设置为在接收到所述Msg3消息之后，对所述Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
优选地，所述第三处理单元，还设置为在所述第一响应消息携带有第二TC-RNTI，以及接收到所述剩余Msg3消息的情况下，对接收到的所述剩余Msg3消息采用所述第一TC-RNTI或者所述第二TC-RNTI进行解扰。
根据本发明的再一方面，提供了一种用户设备UE，包括上述任一项所述的前导码发送装置，和/或对应的任一项所述的随机接入处理装置。
根据本发明的还一方面，提供了一种基站，包括上述任一项所述的前导码接收装置，和/或对应的任一项所述的随机接入处理装置
本发明另一实施例提供了一种计算机存储介质，所述计算机存储介质存储有执行指令，所述执行指令用于执行上述方法实施例中的步骤之一或其组合。
通过本发明，采用确定用于发送前导码的时域和/或频域资源；在确定的所述时域和/或频域资源上发送所述前导码，解决了相关技术中无法实现随机接入过程的问题，进而达到了能够成功进行随机接入的效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的前导码发送方法的流程图；
图2是根据本发明实施例的随机接入方法一的流程图
图3是根据本发明实施例的前导码接收方法的流程图；
图4是根据本发明实施例的随机接入方法二的流程图；
图5是根据本发明实施例的发送Preamble码时间窗内的PRACH资源为时间上连续的示意图；
图6是根据本发明实施例的发送Preamble码时间窗内的PRACH资源为时间上离散等间隔的示意图；
图7是根据本发明实施例的时间窗内在离散PRACH资源上之间再增加PRACH备用资源的示意图；
图8是根据本发明实施例的在Preamble发送窗后额外增加PRACH时域资源的示意图；
图9是根据本发明实施例的Format 0～3下发送Preamble码时执行LBT机制和/或CCA检测位置示意图；
图10是根据本发明实施例的Format 4下发送Preamble码时执行LBT机制和/或CCA检测位置示意图；
图11是根据本发明实施例的前导码发送装置的结构框图；
图12是根据本发明实施例的前导码发送装置中第一发送模块114的优选结构框图一；
图13是根据本发明实施例的前导码发送装置中第一确定模块112的优选结构框图；
图14是根据本发明实施例的前导码发送装置中第一确定模块112中第一确定单元132的优选结构框图；
图15是根据本发明实施例的前导码发送装置中第一发送模块114的优选结构框图二；
图16是根据本发明实施例的前导码接收装置的结构框图；
图17是根据本发明实施例的前导码接收装置中第一接收模块162的优选结构框图；
图18是根据本发明实施例的前导码接收装置中第一处理模块164的优选结构框图；
图19是根据本发明实施例的前导码接收装置的优选结构框图；
图20是根据本发明实施例的随机接入装置一的结构框图；
图21是根据本发明实施例的随机接入装置一中第二处理模块204的优选结构框图；
图22是根据本发明实施例的随机接入装置二的结构框图；
图23是根据本发明实施例的随机接入装置二中第三处理模块224的优选结构框图；
图24是根据本发明实施例的用户设备UE的结构框图；
图25是根据本发明实施例的基站的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。在本发明实施例中所涉及到的与“非授权载波”相关的方案也可以适用于授权载波，部分实施例中是以非授权载波为例进行说明的的。
在本实施例中提供了一种前导码发送方法，图1是根据本发明实施例的前导码发送方法的流程图，如图1所示，该流程包括如下步骤：
步骤S102，确定非授权载波上用于发送前导码的时频域资源(也可以称为时域和/或频域资源)；
步骤S104，在确定的时频域资源上发送前导码。其中，可以通过在该确定的时域和/或频域资源上发送Msg消息的方式来发送该前导码，其中，该Msg消息中包括以下信息至少之一：该前导码，用户设备标识ID，C-RNTI，无线资源控制(Radio Resource Control，简称为RRC)请求，调度请求(Scheduling Request，简称为SR)，缓冲区状态报告(Buffer Status Report，简称为BSR)。需要说明的是，通过发送Msg消息的方式来发送该前导码的情况下，用于发送前导码的部分时域和/或频域资源与用于发送除前导码之外的其它信息的另一部分时域和/或频域资源可以在时域上相同，但频域上偏移一个偏移量的两个时域和/或频域资源；也可以是频域上相同，但时域上偏移另一个偏移量的两个时域和/或频域资源；还可以是在时域上和频域上均存在偏移量的两个时域和/或频域资源，其中，上述的多个偏移量可以相同也可以不同。另外，用于发送其它信息的该另一部分时域和/或频资源可以采用TC-RNTI进行加扰，该TC-RNTI也可以采用多种方式获得，比如，可以通过以下方式至少之一获取：通过与前导码对应的方式获取，由基站分配的方式获取，由基站与UE协商的方式获取，与用户设备标识ID对应的方式获取。
另外，该前导码也可以通过多种方式确定：例如，可以通过以下方式至少之一确定：由基站为UE分配的方式确定，通过物理层信令通知的方式确定，通过高层信令通知的方式确定，由基站与UE协商的方式确定，由系统为UE配置的方式确定。
通过上述步骤，在非授权载波上确定的时域和/或频域资源上发送前导码，解决了相关技术中无法实现在非授权载波上发送前导码以进行随机接入过程的问题，不仅填补了相关技术不能在非授权载波上发送前导码以进行随机接入的空白，进而达到了能够成功在非授权载波上发送前导码进行随机接入的效果，有效提高用户体验的效果。
下面分别基于用户设备UE侧以及基站侧对本发明实施例进行说明。
UE侧：
UE在确定的时域和/或频域资源上发送前导码，依据确定时域和/或频域资源的方式不同，发送的方式也可以多种，即UE在非授权载波上的发送Preamble码的时域和/或频域资源上进 行前导Preamble码的发送，可以包括多种方式，下面举例说明。
例如，依据预定义的方式，确定用于发送所述前导码的所述时域和/或频域资源；和/或，依据物理层下行控制信息DCI信令，确定用于发送所述前导码的所述时域和/或频域资源；和/或，依据高层无线资源控制RRC信令，确定用于发送所述前导码的所述时域和/或频域资源；
例如，对于LTE-U系统，在使用非授权载波进行传输之前，需要先按照先听后说(Listen Before Talk，简称为LBT)机制获取载波的使用权。同样，在非授权载波上进行随机接入过程之前，也可以先执行先听后说LBT机制。一旦(基站或是UE)赢得非授权载波的使用权之后，可以开始随机接入过程发起。反之，当UE执行LBT失败时，这样将可能导致整个随机接入过程被延迟，更糟糕的是，在相同时间提前量组(Timing Advance Group，简称为TAG)内的所有上行载波上的潜在的上行传输将都被延迟。特别在授权载波和非授权载波上的Small Cell不共站场景下，上行授权载波和非授权载波可能属于不同的TAG。因此，在非授权载波上进行独立准确的随机接入过程将是非常有必要的，目的是为了在非授权载波上获取上行同步。
因此，为了提高Preamble发送成功率，可以在非授权载波上执行先听后说LBT或空闲信道评估(Clear Channel Assessment，简称为CCA)检测，依据执行LBT机制和/或CCA检测的执行结果来确定发送Preamble码的时域和/或频域资源，之后，依据确定的时域和/或频域资源来发送前导码；需要说明的是，上述依据执行结果来确定发送前导码是一种优选的考虑前导码发送成功的情况，而为了流程简便，或是增加随机接入的速度，也可以在非授权载波上不执行LBT机制或CCA检测，而直接通过短控制信令(Short Control Singal，简称为SCS)在确定的时域和/或频域资源上发送Preamble码。
考虑提高发送Preamble码的成功率，优选地，可以依据在非授权载波上执行LBT机制和/或CCA检测的执行结果，来确定发送Preamble码的时域和/或频域资源。即，确定非授权载波上用于发送前导码的时域和/或频域资源包括：在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测；依据执行LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源。而依据执行结果来确定发送Preamble码的时域和/或频域资源时，也可以针对多种场景，下面分别说明：
依据执行LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源包括以下之一：
在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第一预定时域和/或频域资源为用于发送前导码的时域和/或频域资源，则UE在该第一预定时域和/或频域资源上发送前导码；需要说明的是，该第一预定时域和/或频域资源可以是K个子帧，或者N个OFDM符号，其中，K，N为大于或等于1的整数，优选为1，2，3。
在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上继续执行LBT机制和/或CCA检测，并在非授权载波上 执行LBT和/或CCA检测成功的情况下，确定LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送前导码的时域和/或频域资源，之后，UE在该确定的邻近时域和/或频域资源上发送前导码；其中，该成功时刻之后的邻近时域和/或频域资源可以为成功时刻之后的一个或多个子帧，或者一个或多个符号。优选地，确定用于发送该前导码的时域和/或频域资源为执行LBT机制和/或CCA检测的成功时刻后的第一个时域和/或频域资源。
在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波的第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行LBT机制和/或CCA检测，并在第二预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第二预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；即在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败时，在下一个对应的第二时域和/或频域资源上重新竞争非授权载波。即在执行失败后，继续在后续的时域和/或频域资源前继续执行LBT机制和/或CCA检测，尝试在该后续的时域和/或频域资源上竞争非授权载波，直到竞争到非授权载波，在执行成功的时刻后的第一个时域和/或频域资源进行Preamble码的发送或者在执行成功后的时域和/或频域资源进行前导码的发送。
对应于上述通过发送Msg消息发送前导码的方式，当UE在上述第一预定时域和/或频域资源之前执行LBT机制和/或CCA检测失败，即未竞争到非授权载波时，UE继续执行LBT机制和/或CCA检测，在执行LBT机制和/或CCA检测成功时刻后的第一个时域和/或频域资源上发送Msg消息；或者，UE在下一个第一时域和/或频域资源(即上述的第二预定时域和/或频域资源)前执行LBT和/或CCA，若LBT和/或CCA成功，则在当前第一时域和/或频域资源上发送Msg消息。反之，LBT和/或CCA失败，则停止在当前第一时域和/或频域资源上发送Msg消息，而必须等待到下一个第一时域和/或频域资源时刻之前继续尝试执行LBT和/或CCA。
需要指出的是，上述邻近时域和/或频域资源、第二预定时域和/或频域资源，第三时域和/或频域资源分别可以是一个也可以是多个，当是多个时，该多个邻近时域和/或频域资源或者多个第二预定时域和/或频域资源在或者多个第三预定时域和/或频域资源分别在时域上可以是连续的，也可以是离散的。其中，该邻近时域和/或频域资源、第二预定时域和/或频域资源，第三时域和/或频域资源包括时域上离散的时域和/或频域资源可以包括以下之一：时域上等间隔且资源块大小不等的时域和/或频域资源；时域上等间隔且资源块大小相同的时域和/或频域资源；时域上不等间隔且资源块大小不等的时域和/或频域资源；时域上不等间隔且资源块大小相同的时域和/或频域资源。
针对上述第一预定时域和/或频域资源、上述第二预定时域和/或频域资源、上述第三预定时域和/或频域资源、LBT/CCA或CP或GT或PRACH资源的起始位置或时长或结束位置，中的至少之一，确定的方式可以包括多种，例如，第一预定时域和/或频域资源、第二预定时域资源、第三预定时域和/或频域资源、LBT/CCA或CP或GT或PRACH资源的起始位置或时长或结束位置，中至少之一可以通过以下方式至少之一确定：由基站为用户设备UE分配的 方式确定；由物理层信令(例如，下行控制信息(Downlink Control Information，简称为DCI))通知的方式确定；由高层信令(例如，RRC)通知的方式确定；由基站与UE协商的方式确定；由系统为UE预先配置的方式确定。
在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在本实施例中，提供了一种优选的处理方式，例如，在非授权载波上用于发送前导码的时间窗内执行LBT机制和/或CCA检测，并在时间窗内的第三预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定该第三预定时域和/或频域资源为用于发送前导码的时域和/或频域资源。
即在执行检测失败的情况下，尝试在时间窗内候选的时域和/或频域资源(即上述第三时域和/或频域资源)前尝试执行LBT机制和/或CCA检测，并在候选的时域和/或频域资源前执行成功的情况下，确定该候选的时域和/或频域资源为用于发送前导码的时域和/或频域资源。需要说明的是，该时间窗可以位于多个可以用于执行LBT机制和/或CCA检测的时间位置，比如，可以位于上述第一预定时域和/或频域资源之前，之后，或者直接包括上述第一预定时域和/或频域资源。较优地，可以位于上述第一预定时域和/或频域资源之后。较优地，该时间窗中的第三预定时域和/或频域资源可以通过以下参数来确定：用于标识第一预定时域和/或频域资源与时间窗起点之间偏移距离的第一偏移量；用于标识时间窗内用于发送前导码的第三预定时域和/或频域资源与时间窗起点之间的偏移距离的第二偏移量；第三预定时域和/或频域资源的大小；第三预定时域和/或频域资源的数目；时间窗的窗长；第三预定时域和/或频域资源间的间隔。
另外，该时间窗内所包括的第三预定时域和/或频域资源也可以为一个或多个，当该第三预定时域和/或频域资源为多个的情况下，该第三预定时域和/或频域资源在时域上可以是连续的，也可以是离散的。当该第三预定时域和/或频域资源在时域上是离散的情况下，也包括多种形式，例如，可以包括以下形式至少之一：时域上等间隔且资源块大小不等的时域资源；时域上等间隔且资源块大小相同的时域资源；时域上不等间隔且资源块大小不等的时域资源；时域上不等间隔且资源块大小相同的时域资源。
对应于上述通过发送Msg消息发送前导码的方式，为了提高或增加发送Msg消息中的前导Preamble码的成功概率，可以按照下述之一：方式1：缩短发送前导Preamble码的时域资源之间的间隔/周期。方式2：设计前导Preamble码发送时间窗。
前导Preamble码的发送时间窗，可以位于多个时间区域，例如，可以位于以下时间区域的任意一个：时间窗位于上述第一时域和/或频域资源之前；时间窗位于上述第一预定时域和/或频域资源之后；时间窗包含上述第一预定时域和/或频域资源；时间窗位于执行LBT机制和/或CCA检测的时域和/或频域位置之前；时间窗位于执行LBT机制和/或CCA检测的时域和/或频域位置之后；时间窗包含执行LBT机制和/或CCA检测的时域和/或频域位置。优选地，该时间窗位于上述第一预定时域和/或频资源之后。
另外，该前导Preamble码的发送时间窗内用于补充发送Preamble码的时域和/或频域资源 与上述第一预定时域和/或频域资源可以是时域上连续的，也可以时域上不连续的。
当该时间窗位于上述第一预定时域和/或频域资源之后时，且时窗内用于补充发送前导Preamble码时域和/或频域资源为连续时，该方法包括如下处理：如果在上述第一预定时域和/或频域资源之前没有竞争到非授权载波，则UE可以尝试在时间窗内的第一个用于补充发送前导Preamble码的时域和/或频域资源之前继续执行LBT机制和/或CCA检测。如果成功竞争到非授权载波的使用权，则UE在当前用于补充发送Preamble码的时域和/或频域资源上发送。如果没有竞争到非授权载波使用权，则UE停止在当前用于补充发送Preamble码的时域和/或频域资源上发送，而是继续尝试在时间窗内下一个用于补充发送前导Preamble码的时域资源之前继续执行LBT机制和/或CCA检测。若执行LBT机制和/或CCA检测成功，则在当前用于补充发送前导Preamble码的时域和/或频域资源上发送Preamble码。反之，若执行LBT机制和/或CCA检测失败，则继续在时间窗内用于补充发送前导Preamble码的时域和/或频域资源上继续尝试执行LBT机制和/或CCA检测而发送Preamble码，直到时间窗结束。如果UE在当前时间窗一直未能竞争到非授权载波，则在下一个第一预定时域和/或频域资源(如上述的第二预定时域和/或频域资源)和时间窗内尝试发送。
当时间窗位于上述第一预定时域和/或频域资源之后，且时间窗内用于补充发送前导Preamble码的时域和/或频域资源为不连续时，该方法包括如下处理：如果UE在上述第一预定时域和/或频域资源上没有竞争到非授权载波，则UE停止在当前第一预定时域和/或频域资源上发送Preamble，而尝试在时间窗内第一个用于补充发送前导Preamble码的时域和/或频域资源上发送Preamble码。如果竞争到第一个用于补充发送前导Preamble码的时域和/或频域资源，则在该时域和/或频域资源上发送，频域资源位置相对于上述第一预定时域和/或频域资源可以不变，或者，改变。反之，如果没有竞争到第一个用于补充发送前导Preamble码的时域和/或频域资源，则停止在该第一个用于补充发送前导Preamble码的时域和/或频域资源上发送Preamble码。在时间窗内下一个用于补充发送前导Preamble码的时域和/或频域资源上继续执行LBT机制和/或CCA检测，尝试发送Preamble码，直到时间窗结束。如果在时间窗内一直未能竞争到非授权载波，则UE只能等待下一个配置的第一预定时域资源(即上述的第二预定时域和/或频域资源)和时间窗内尝试发送。
如果UE在上述第一预定时域资源上没有竞争到非授权载波，且时间长窗内第一个用于补充发送Preamble码的PRACH时域资源位置未到，则在在该第一预定时域资源之后，时间窗内第一个用于补发PRACH之前的时域和/或频域资源上继续尝试发送Preamble，如果执行LBT机制和/或CCA检测成功，则在当前时刻点上发送Preamble码。优选地，在配置的第一预定时域资源之后的第一个时域资源上新增发送Preamble码的机会。
另外，在前导Preamble发送窗内依然未能竞争到非授权载波的情况下，可在发送窗后额外增加发送Preamble的时域和/或频域资源。
基于LBT结果的不确定，通过上述确定用于发送前导码的时域和/或频域资源的实施方式中增加Preamble码发送成功概率的方法，优化了基于竞争随机接入方式的流程，从而一定程度上降低上行传输时延。
上述各种确定用于发送前导码的时域和/或频域资源的过程中，用于执行LBT机制和/或CCA检测的位置也可以包括多种可能，例如，大致分为两种，限定的执行LBT机制和/或CCA检测的执行位置，或者，不限定执行LBT机制和/或CCA检测的执行位置。例如，该限定的执行位置如上述的第一预定时域和/或频域资源前的区域，而不限定的执行位置包括：UE可以执行LBT机制和/或CCA检测的任何位置。UE根据执行LBT机制和/或CCA检测成功的成功时刻确定发送Preamble码，优选地，确定用于发送Preamble码的时域和/或频域资源为执行LBT机制和/或CCA检测成功的成功时刻后的第一个时域和/或频域资源。
而上述的第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域，也可以包括多种类型，例如，该第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域可以包括以下之一：第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的特殊子帧；第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的上行子帧；第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的前导码子帧。需要说明的是，上述第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域属于一种相对限定的执行LBT机制和/或CCA检测的位置，而执行LBT机制和/或CCA检测的位置也可以不限定，例如，执行LBT机制和/或CCA检测的位置可以是任何能够执行的位置，因此，对应地发送前导码的时域和/或频域资源也取决于执行LBT机制和/或CCA检测的位置，以及执行成功的成功时刻。针对上述各种相对限定的类型，下面分别说明。
在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的上行导频时隙(Uplink Pilot Time Slot，简称为UpPTS)的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：部分/全部UpPTS；部分/全部保护时隙GP和/或UpPTS；部分/全部DwPTS和/或GP和/或UpPTS；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS；部分/全部UpPTS和/或部分/全部CP时间；部分/全部GP和/或UpPTS和/或部分/全部CP时间；部分/全部DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的保护时隙GP的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：部分/全部GP时间；部分/全部GP和/或部分/全部CP时间；部分/全部下行导频时隙DwPTS和/或GP和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或部分/全部CP时间。
在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧，并且第一预定时域和/或频域资源或者第二预定时域 和/或频域资源前或者第三预定时域和/或频域资源的前一个子帧存在物理随机接入信道PRACH信道的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：前一个子帧的PRACH的部分/全部GT时间；前一个子帧的PRACH的部分/全部GT时间和/或第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源所在当前PRACH子帧的部分或全部CP时间；在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧，并且第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源的前一个子帧无PRACH信道的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：前一个子帧的最后k个正交频分复用OFDM符号内；前一个子帧的最后k个正交频分复用OFDM符号和/或第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源所在当前PRACH子帧的部分/全部CP时间。
对应于上述通过发送Msg消息发送前导码的方式，用于发送前导码的时域和/或频域资源取决于执行LBT机制和/或CCA检测的位置和/或执行成功的成功时刻，下面举例说明。
例如，用于发送前导码的时域和/或频域资源位置取决于执行LBT机制和/或CCA检测的位置和/或成功时刻包括：根据执行LBT机制和/或CCA检测的位置确定发送Preamble码的PRACH时域资源(即上述用于发送前导码的时域和/或频域资源)。如果执行LBT机制和/或CCA检测的时域和/或频域位置确定，则UE在可能的执行LBT机制和/或CCA检测的时域和/或频域位置上竞争非授权载波的使用权。如果竞争到非授权载波的使用权，则在执行LBT机制和/或CCA检测成功后的k个完整OFDM符号，或者，一个或多个子帧上发送Preamble码。如果执行LBT机制和/或CCA检测成功的成功时刻未到符号或子帧边界，则需要发送预留信号或占用信号。Preamble码的发送取决于执行LBT机制和/或CCA检测的位置。
又例如，用于发送前导码的时域和/或频域资源位置取决于执行LBT机制和/或CCA检测的位置和/或成功时刻包括：不限定执行LBT机制和/或CCA检测位置，确定发送Preamble码的时域和/或频域资源。即UE可以在任意时刻开始执行LBT过程，而在执行LBT机制/CCA检测成功时刻后的k个完整OFDM符号，或者，一个或多个子帧上发送Preamble码。如果执行LBT机制和/或CCA检测成功时刻未到符号或子帧边界，则需要发送预留信号或占用信号。Preamble码的发送取决于执行LBT机制和/或CCA检测开始时刻以及成功时刻，与配置的PRACH或可用PRACH资源无关，或者，也可以有关。
针对支持的格式不同，下面分别说明。
对于format0～3，若上述第一预定时域和/或频域资源之前为UpPTS时，其执行LBT机制和/或CCA检测的位置可以包括以下之一：部分或全部UpPTS；部分或全部UpPTS和部分或全部CP时间；部分或全部GP和UpPT和部分或全部CP时间；部分或全部DwPTS和GP和UpPT和部分或全部CP时间；下行子帧中最后k个符号和DwPTS和GP和UpPT和部分或全部CP时间。
对于format0～3，若上述第一预定时域和/或频域资源之前为PRACH子帧时，则执行LBT 机制和/或CCA检测的位置包括以下之一：PRACH子帧中的部分或全部GT时间；部分或全部GT和第一时域和/或频域资源中的部分或全部CP时间。
其中：执行LBT机制和/或CCA检测的起始点可以是从GT的起点或是GT中某一位置。
对于format0～3，若上述第一预定时域和/或频域资源之前为正常子帧时，其执行LBT机制和/或CCA检测的位置可以包括以下之一：正常子帧中的最后k个OFDM符号；正常子帧中k个OFDM符号和第一时域和/或频域资源中部分或全部CP。
对于format4，其执行LBT机制和/或CCA检测的位置包括以下之一：部分或全部GP时间；部分或全部GP和部分或全部CP时间；部分或全部DwPTS和GP和部分或全部CP时间。
在UE通过上述Msg消息发送前导码之后，UE监听eNB发送的RAR，包括：UE根据预设或是与Preamble对应的无线网络临时标识RA-RNTI对RAR的下行控制信息DCI的循环冗余校验码(Cyclic Redundancy Check，简称为CRC)进行解扰，并接收该RAR；该RAR可以包括一个临时小区无线网络临时标识TC-RNTI和/或一个上行授权(Uplink grant，简称为ULgrant)和/或TA值。
UE监听eNB发送的RAR时，还包括：UE采用预定于或eNB通知TC-RNTI对物理下行控制信道(Physical Downlink Control Channel，简称为PDCCH)进行解扰，获取C-RNTI，或者，UE ID。并在UE监听eNB发送的RAR之后，根据分配给自身的上行授权或者预定于或者eNB与UE预定的时域和/或频域资源上发送Msg3。其中，Msg3消息可以是UE ID，C-RNTI，无线资源控制(Radio Resource Control，简称为RRC)请求，SR中的部分或是全部。
由于非授权载波的使用是基于执行LBT机制/CCA检测的执行结果，因而具有一定的不确定性，所以，一旦获取到非授权载波的使用权，则尽可能的提前发送一些有用信息。例如，在确定的时域和/或频域资源上发送前导码时，可以根据确定的时域和/或频域资源，确定非授权载波上用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；在确定的时域和/或频域资源上发送前导码，和在确定的第四预定时域和/或频域资源上发送Msg3消息的部分或全部内容。
其中，上述第四预定时域和/或频域资源可以多种，例如，可以包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
图2是根据本发明实施例的随机接入方法一的流程图，如图2所示，该流程包括如下步骤：
步骤S202，获取非授权载波的使用权；
步骤S204，依据获取到使用权的非授权载波进行随机接入处理。
通过上述步骤，在获取使用权的非授权载波上进行随机接入处理，解决了相关技术中无法实现在非授权载波上进行随机接入过程的问题，不仅填补了相关技术不能在非授权载波上 随机接入的空白，进而达到了能够成功在非授权载波上进行随机接入的效果，有效提高用户体验的效果。
依据获取到的非授权载波进行随机接入处理有多种方式，例如，可以采用方式一：在非授权载波上向基站发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和携/或带有Msg3消息的部分内容的部分Msg3消息，其中，该Msg3消息的部分内容可以包括以下至少之一：用户设备标识UE ID，小区无线网络临时标识C-RNTI，无线资源控制RRC请求，SR，BSR；接收基站根据Msg_1消息发送的第一响应消息；根据第一响应消息向基站发送携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；接收基站依据剩余Msg3消息发送的Msg4消息；依据Msg4消息确定在非授权载波上进行随机接入是否成功。当然，也可以以下方式二：在非授权载波上向基站发送Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；接收基站根据Msg_M消息发送的第二响应消息；依据第二响应消息确定在非授权载波上进行随机接入是否成功。
需要说明的是，用于发送Msg1消息的时域和/或频域资源与用于发送上述部分Msg3消息的时域和/或频域资源可以相同，也可以不同；用于发送Msg1消息的时域和/或频域资源与用于发送Msg3消息的时域和/或频域资源也可以相同或者不同。上述为不同的时域和/或频域资源也可以有多种形式，例如，可以是时域相同，频域不同的时域和/或频域资源，可以是时域不同，频域相同的时域和/或频域资源，还可以是时域不同，频域也不同的时域和/或频域资源。
较优地，发送部分Msg3消息和/或Msg3消息，还包括：对用于发送部分Msg3消息和/或Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。其中，该TC-RNTI通过以下对应关系至少之一获取：TC-RNTI与前导码之间的对应关系，TC-RNTI与UE ID之间的对应关系，TC-RNTI与前导码和UE ID之间的对应关系；或者，
TC-RNTI通过以下方式至少之一获取：通过基站与UE约定的方式获取，通过由基站通知或配置UE的方式获取，通过高层信令通知的方式获取，通过物理层信令通知的方式获取，通过媒体接入控制MAC层信令通知的方式获取。
第一响应消息可以携带有以下信息至少之一：第二TC-RNTI，上行授权信息，前导码索引，C-RNTI，TA。发送剩余Msg3消息，还包括：对用于发送剩余Msg3消息的传输信道和/或控制信道采用第一TC-RNTI或者第二TC-RNTI进行加扰。
在分配给自身的上行授权上发送Msg3之后，UE接收eNB发送的Msg4消息。其中，Msg4消息中的DCI中的CRC是采用分配给UE或者之前约定的TC-RNTI进行加扰。UE接收eNB发送的Msg4消息之后，UE向eNB发送用于向eNB通知UE接入成功的指示信号，或者，重新发起随机接入指示消息。
需要说明的是，上述确定用于发送前导码的时域和/或频域资源的各种方法，可以单个分别用于确定用于发送前导码的时域和/或频域资源，也可以联合进行确定，例如，
如果UE在上述第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败，则在当前时域和/或频域资源上停止发送Preamble码，而在时间窗内的第三预定时域和/或频域资源前继续尝试竞争非授权载波，如果执行LBT机制和/或CCA检测成功，则在该时域和/或频域资源上发送Preamble码。如果执行LBT机制和/或CCA检测失败，则继续在时间窗内候选的时域和/或频域资源前依次尝试竞争非授权载波，在第三预定时域和/或频域资源中任意一个前执行LBT机制和/或CCA检测成功，则就在该时域和/或频域资源上进行Preamble码的发送。反之，如果在配置的时间窗内候选的时域和/或频域资源上一直未竞争到非授权载波，则停止发送Preamble码，只能等待下一个配置的时域和/或频域资源重新竞争信道。
基站侧：
图3是根据本发明实施例的前导码接收方法的流程图，如图3所示，该流程包括如下步骤：
步骤S302，接收用户设备UE在非授权载波上的时域和/或频域资源上发送的前导码；其中，对应于上述在时域和/或频域资源上发送Msg消息的方式，该时域和/或频域资源包括用于发送前导码的部分时域和/或频域资源和用于发送除前导码之外的其它信息(例如，包括UE ID，C-RNTI，SR中至少之一)的另一部分资源。
步骤S304，依据接收的前导码执行对UE的随机接入处理。
通过上述步骤，在非授权载波上确定的时域和/或频域资源上接收前导码，解决了相关技术中无法实现在非授权载波上接收前导码以进行随机接入过程的问题，不仅填补了相关技术不能在非授权载波上接收前导码以进行随机接入的空白，进而达到了能够成功在非授权载波上接收前导码以进行随机接入的效果，有效提高用户体验的效果。
接收UE在非授权载波上的时域和/或频域资源上发送的前导码时，可以采用多种处理方式，例如，为了提高前导码发送的成功率，可以依据UE在非授权载波上执行LBT机制和/或CCA检测从而竞争到用于发送前导码的时域和/或频域资源，发送前导码。又例如，也可以直接接收UE通过短控制信令SCS，在非授权载波上的时域和/或频域资源上发送的前导码。即在UE不执行LBT机制和/或CCA检测竞争非授权载波时，直接通过SCS发送前导码，虽然不能保证成功发送前导码，但也具备加快流程的好处。
为使得竞争到的非授权载波能够有效利用，在依据接收的前导码执行对UE的随机接入处理时，可以在非授权载波上的第四预定时域和/或频域资源上接收Msg3消息的部分或全部内容，其中，第四预定时域和/或频域资源包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
另外，在接收UE在非授权载波上的时域和/或频域资源上发送的前导码之前，还包括：向UE发送用于确定时域和/或频域资源和/或第四时域和/或频域资源和/或前导码的指令。其中，该指令可以包括：物理层信令DCI，也可以是高层无线资源控制RRC信令。上述DCI或 者RRC信令中可以包括以下信息至少之一：TC-RNTI，Preamble标识，发送Preamble的时域和/或频域资源，或者，发送部分或全部Msg3消息的时域和/或频域资源。
图4是根据本发明实施例的随机接入方法二的流程图，如图4所示，该流程包括如下步骤：
步骤S402，确定用户设备UE竞争到的非授权载波；
步骤S404，依据确定的非授权载波执行UE的随机接入处理。
通过上述步骤，在UE确定竞争到的非授权载波上执行UE的随机接入处理，解决了相关技术中无法实现在非授权载波上进行随机接入过程的问题，不仅填补了相关技术不能在非授权载波上进行随机接入的空白，进而达到了能够成功在非授权载波上进行随机接入的效果，有效提高用户体验的效果。
对应于上述UE的随机接入流程，基站执行的依据确定的非授权载波执行UE的随机接入处理包括：在非授权载波上接收UE发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；基于Msg_1消息向UE发送第一响应消息；接收UE根据第一响应消息发送的携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；依据剩余Msg3消息向UE发送Msg4消息，其中，Msg4消息用于UE确定在非授权载波上进行随机接入是否成功；或者，在非授权载波上接收UE发送的Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；根据Msg_M消息向UE发送第二响应消息，其中，第二响应消息用于UE确定在非授权载波上进行随机接入是否成功。
需要说明的是，基于Msg_1消息向UE发送第一响应消息可以采用多种方式，例如，可以直接在在授权载波上向UE发送第一响应消息；也可以在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送第一响应消息。
在接收到UE发送的Msg消息之后，可以向UE发送该Preamble码对应的随机接入响应RAR；或者，发送Msg1和部分或全部Msg3消息的响应信息。其中，Msg1和部分或全部Msg3消息的响应信息中包括下述至少之一：TC-RNTI、上行授权、TA、Preamble Index、C-RNTI、UE ID；该RAR中可以包括下述至少之一：TC-RNTI、上行授权、TA、Preamble Index。
之后的随机接入还包括以下处理：在发送Preamble码对应的随机接入响应RAR之后，接收由所属UE根据分配给自己的上行授权发送Msg3消息。或者，在向UE发送Msg1和部分Msg3消息的响应信息之后，接收由所属UE根据分配给自己的上行授权发送剩余的或全部的Msg3消息。或者，接收由所属UE根据分配给自己的上行授权发送剩余的或全部的Msg3消息之后，向UE发送Msg4消息。需要指出的是，对应于上述UE侧加扰的处理，基站也需要执行对应的解扰操作，例如，在接收到部分Msg3消息和/或Msg3消息之后，还包括：对部分Msg3消息和/或Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。在第一 响应消息携带有第二TC-RNTI，以及接收到剩余Msg3消息的情况下，对接收到的剩余Msg3消息采用第一TC-RNTI或者第二TC-RNTI进行解扰。
结合上述实施例及优选实施方式，对下面本发明完整优选实施例进行说明。
优选实施例一：
该优选实施例中，给出了一种非竞争的随机接入方法。该示例适用于切换过程、下行数据到达和定位UE等情况，也适用于(e)CA，或，DC场景，具体步骤如下：
步骤一：演进基站eNB为UE分配一个专有标识，即C-RNTI。
步骤二：eNB通知UE进行随机接入，完成上行同步。
eNB通知下属UE进行随机接入，并完成上行同步，通知信令可以是物理层信令，也可以是高层信令。
该物理层信令可以是一个DCI。该DCI中的CRC采用该UE的C-RNTI进行加扰或加掩码；
如果该DCI是通过授权载波进行下发，则eNB直接通过PDCCH中DCI通知UE进行随机接入；
而如果DCI是通过非授权载波进行下发，则eNB在下发DCI之前，需要先执行先听后说LBT或空闲信道评估CCA检测。若检测到信道状态为空闲，则认为获取到非授权载波的使用权，可以在该非授权载波上发送DCI信息。反之，若未能竞争到非授权载波，则将不能在该非授权载波上发送DCI消息。可选地，为了避免eNB一直执行LBT失败而接入不了非授权载波，可以在授权载波上发送DCI。
这里，简要叙述传输设备(如，eNB或UE)在非授权载波上进行下行传输所需要执行的先听后说LBT机制/空闲信道评估CCA，例如，其先听后说LBT机制包括以下之一：LBT Cat4；或者，LBT Cat2，或者，增强型LBT Cat2，或者，直接eCCA过程。根据非授权载波上下行传输采用LBT Cat4机制，且竞争窗较大，例如，7,15,31,63,127,255,511,1023等，而基站为了在非授权载波上发送随机接入触发信令PDCCH order可以执行竞争窗小的LBT Cat4(例如，竞争窗可以为1,2,3,4,5,6,7,8,9,10,11,12等)或简化的LBT机制(如LBT Cat2)。
其中，LBT Cat4(即defer period+eCCA过程)的流程大体为：
传输设备(如，eNB或UE)在defer period内检测到信道空闲，则可以进行下行传输。和/或，
传输设备(如，eNB或UE)在defer period内检测到信道空闲后，按照下述步骤直到随机回退值N递减到0时，则可以进行下行或上行传输。
Step1：设置初始随机回退值N。
其中，随机回退值N可以是在[0,CWp]之间均匀分布或二项分布随机产生的一个数，或者，也可以是基站指示N值，或者，预定义N值。CWp是介于CWmin和CWmax之间的随机数，其中，CWmin为不小于1的正整数，CWmax最大值为1024。优选地，CWmax可以为1，2，3，4，5，6，7，11，15，31，63，127，255等。
Step2：判断当前N值是否大于0。如果判断结果N大于0，则N值进行递减特定数量的操作。
其中：特定数量可以是基站配置，或者，预定义。优选地，特定数量为1，即N＝N-1操作。
Step3：设备检测slot内的信道空闲状况，如果在slot内检测到信道空闲，则进入Step4。反之，如果在slot内检测到信道忙，进入Step5。
Step4：判断当前N值是否等于0，如果等于0，则停止进行信道检测，认为获取到非授权载波的使用权。反之，如果N不等于0，则转向Step2。
Step5：检测defer period内信道空闲状况。如果在defer period内检测到信道空闲，则转向Step2。反之，如果在defer period内检测到信道忙，则重复执行Step5。defer period可以有一个固定duration长度加上n乘以slot组成。n为大于等于0的数，优选地，n为0，1，2，3等。slot长度为9us，固定的duration时长为16us。
LBT Cat2的流程大体为：CCA检测开始时刻可以是固定，或者，动态可变，或者，在特定的区间内若干个小时间段内随机选择，或者，在特定的区间内若干个小时间段内配置固定位置。若检测信道从忙变闲，且连续检测信道空闲时间不小于预设CCA duration长度，则认为获取到非授权载波的使用权。对于本发明，优选地，eNB下发DCI可以采用LBT Cat2进行信道接入。其中，CCA duration时长可以16us+n*slot时长，n为大于等于0的整数，优选地，n为1，2，3等。slot时长为9us。即CCA duration可以为16us，或者，25us，34us等，还可以为9us，或，4us。
增强的LBT Cat2，与LBT Cat2的区别在于，CCA检测的起点可以在一定时间段内随机选择。有利于异步系统间竞争接入信道的公平性和使CCA检测起点早的传输设备提前竞争接入信道。例如，假定一定时间段为10，可以分为10小段，每个小段占用1份，则传输设备1可以在10小段中的第3小段起点作为自己CCA检测的起点，而传输设备2则可以固定配置10小段中的第7小段起点作为自己CCA检测的起点。即不同传输设备可以随机选择CCA检测起点，也可以固定配置不同的起点位置。
直接eCCA过程。即eCCA过程是由N个slot过程，以及当slot检测到信道忙时，进入defer period或不进入defer period组成。N为随机回退值，N在[0,CWp]之间随机产生的一个整数，CWp在[CWmin,CWmax]之间随机产生的一个整数。此外，N可以是基站指示给UE，或预定义。优选地，N可以为1，2，3。最大竞争窗CWmax可以为[1,63]之间的正整数。具体eCCA过程为：
步骤1：产生随机回退值N。
步骤2：判断当前N是否大于0。如果大于0，则进入步骤3。如果等于0，则认为获取到非授权载波使用权。此时，如果UE还没有执行一次slot检测，或，没有进入到eCCA过程，则需要重设随机回退值N，进入步骤1。
步骤3：传输设备在slot内检测信道是否空闲，如果信道空闲，则进入步骤4。或者，如果检测到信道忙，则进入defer period，即步骤5，或者，直接不进入defer period，而直接重复步骤3。
步骤4：执行N值递减一定数量值操作。其中，一定数量值可以是预定义，或，基站指示，或，基站和UE事先约定。优选地，N＝N-1。进入步骤2。
步骤5：检测defer period内信道是否空闲，如果评估信道空闲，则进入步骤4。如果检测信道忙，重复步骤5。defer period是由16us+n*slot组成，n为大于等于0的整数，优选地，n为0，1，2，3等。slot时长为9us。
上述几种LBT机制中步骤和/或过程在不影响的情况下，可以进行更换前后执行顺序。
相应地，接收到加扰后的CRC的UE将按照相应的解扰方式即可得到加扰前的CRC。
其中，高层信令可以是RRC信令。该高层信令可以是发送给UE的公共信令，也可以是发送给UE的专用RRC信令。其中，该RRC信令主要用于通知UE进行随机接入。
具体地，上述DCI或RRC通知信令中可以包括下述至少之一：
仅包含前导码Preamble的相关信息，比如：Preamble索引，收到该Preamble索引后，UE可以根据Preamble码的相关信息确定发送的Preamble。而发送前导码Preamble的时域和/或频域资源(即上述的用于发送前导码的时域和/或频域资源)可以是预先定义的，例如：预先定义UE发送的Preamble索引对应的时域和/或频域资源，或者，预先为UE定义一个固定的时域和/或频域资源，或者，约定根据LBT定义一个时域和/或频域资源(即根据LBT位置或LBT执行结果配置一个时域和/或频域资源或时域和/或频域资源集合)，或者，预先定义一个发送Preamble码的时域和/或频域资源候选集合，或者，UE和eNB之间事先约定好一个时域和/或频域资源或时域和/或频域资源集合，或者，按照UE ID与时域和/或频域资源对应关系确定的时域和/或频域资源。
优选地，还可以包含一个时域信息。比如，发送子帧信息，即UE在该时域信息对应的子帧上发送前导Preamble码。这样，UE收到通知信令后，发送前导Preamble的频域信息可以预设，比如，预先设置一个固定的频域资源，或者，UE和eNB事先约定一个频域资源，或者，在候选的频域资源集合中随机选择，或者，在候选的资源集合中选择频域资源索引号最小的，或者，最大的，或者，固定的一个，或者，或者，按照UE ID与频域资源对应关系确定频域资源位置。
包含前导Preamble信息和时域和/或频域资源信息；
不包含前导Preamble信息和时域和/或频域资源信息。即UE收到上述通知信令后直接将按照该UE与eNB约定的Preamble，以及按照事先约定的时域和/或频域资源，或者，根据LBT成功时刻后的特定时域和/或频域资源上发送Preamble码给eNB。其中：这里特定的时域资源可以是LBT成功时刻后紧接着的第一个子帧或若干符号或子帧，或者，当前PRACH资源上LBT失败后的特定时间窗内的子帧或offset偏移量后的一个或多个符号或子帧。
步骤三：UE向演进基站eNB发送专用的Preamble码。
UE在收到上述通知信令之后，在授权载波上相应的Preamble码的时域和/或频域资源上发送前导Preamble码；或者，
UE在收到上述通知信令之后，在非授权载波上不执行LBT机制和/CCA检测过程，而是按照短控制信令SCS在相应的Preamble码的时域和/或频域资源上发送前导Preamble码。基站和UE事先预计或默认候选哪些时域和/或频域资源上UE可以发送前导Preamble码。这种情况，可能会出现UE可以发送前导Preamble码的时域和/或频域资源并不是本小区中UE或不是同运营商中的UE正在占用，从而导致UE发送的前导Preamble码基站接收不到或评估信道不准等问题；或者，基站在每个子帧上或每个候选时域和/或频域资源上指示UE是否可以发送前导Preamble码，即基站会指示UE当前子帧或当前时域和/或频域资源为同小区或同运营商中的UE正在占用，则该UE可以不执行LBT直接在该子帧或该时域和/或频域资源上发送前导Preamble码；或者，采用基站和UE事先预计或默认候选哪些子帧上UE可以发送前导Preamble码，再结合基站的信令指示确定在哪个子帧上或时域和/或频域资源上发送前导Preamble码；或者，同小区或同运营商间已经成功占用信道的UE给其他UE通知交互占到信息(如采用D2D技术)，从而使得其他UE不用执行LBT而直接使用已经占到的UE的资源中发送自身的前导Preamble码；或者，
UE在收到通知信令之后，执行LBT机制和/或CCA检测。如果在eNB通知，或者，高层信令通知，或者，预先约定的时域和/或频域资源(即上述第一预定时域和/或频域资源)之前完成LBT机制和/或CCA检测过程，则可以正常在相应的eNB通知的，或者，信令通知(物理层DCI或高层RRC信令)，或者，预先约定的时域和/或频域上发送相应的eNB通知的，或者，信令通知(物理层DCI或高层RRC信令)，或者，预先约定的前导Preamble码。反之，在eNB通知的，或者，信令通知(物理层DCI或高层RRC信令)，或者，预先约定的时域和/或频域上之前未完成LBT机制和/或CCA检测，则不能正常发送相应的eNB通知的，或者，预先约定的前导Preamble码。或者，在执行LBT机制和/或CCA检测成功时刻后的特定时域和/或频域资源(即上述执行LBT机制和/或CCA检测成功的成功时刻后的邻近时域和/或频域资源)上发送Preamble码。其中：这里特定的时域资源可以是LBT成功时刻后紧接着的第一个子帧或若干符号或子帧，或者，当前PRACH资源上LBT失败后的特定时间窗内的子帧或offset偏移量后的一个或多个符号或子帧；或者，
UE在收到通知信令之前，就开始执行LBT机制和/或CCA检测。如果eNB通知，或者，高层信令通知，或者，预先约定的时域和/或频域资源之前完成LBT机制和/或CCA检测过程，则可以正常在相应的eNB通知的，或者，高层信令通知，或者，预先约定的时域和/或频域上 发送相应的eNB通知的，或者，高层信令通知，或者，预先约定的前导Preamble码。反之，在eNB通知的，或者，高层信令通知，或者，预先约定的时域和/或频域资源之前未完成LBT机制和/或CCA检测，则不能正常发送前导Preamble码。或者，在LBT机制和/或CCA检测成功时刻后的特定时域和/或频域资源上发送Preamble码。其中：这里特定的时域资源可以是LBT成功时刻后紧接着的第一个子帧或若干符号或子帧，或者，当前PRACH资源上LBT失败后的特定时间窗内的子帧或offset偏移量后的一个或多个符号或子帧(第三预定时域和/或频域资源)；
UE侧执行的LBT机制和/或CCA，可以包括以下之一：LBT Cat4(CWmax建议尽可能小)，或者，LBT Cat2，或者，增强的LBT Cat2，或者，defer period+eCCA(检测到信道忙，无延迟期，或者，有延迟期)，或者，eCCA过程(检测到信道忙，包括：无延迟期，或，有延迟期)。优选地，UE发送Preamble前导码采用LBT Cat2，或者，eCCA(eCCA由N*slot组成，N为不小于1的正整数，优选地，N或最大竞争窗为3，4，5，6，7，8，9，10，11，12，13，14，15，slot时长为9us)且无延迟期。这里，无延迟期的eCCA是指在slot duration内检测到信道为忙时，不进入defer period，而是直接进行下一次slot duration内的信道忙闲判断。其中，该defer period可以由16us+n*slot组成，优选地，n为0,1,2。slot为9us。此外，16us由9us+7us或7us+9us组成。所述由eCCA过程中的最大竞争窗优选地为1，2，3，4，5，6。
步骤四：UE监听eNB发送的专用Preamble码对应的随机接入响应。
在UE发送了前导Preamble之后，UE监听eNB发送的RAR。其中，RAR中的PDCCH的CRC是用RA-RNTI加扰或者加掩码的，该RA-RNTI可以是预定义的，该RA-RNTI是与发送Preamble前导码的时域资源和频域资源位置确定的。其中：对于TDD一个子帧中最后6个PRACH频域资源，而对于FDD则一个时刻只可能有一个PRACH频域资源。进一步地，当有大量的UE都发送了Preamble前导码，而此时一个子帧中配置的频域资源出现不够用时，则可以扩展PRACH的频域资源个数，以及PRACH的时域资源范围或个数。
RA-RNTI＝1+t_id+10*f_id
基于上式，若时域资源固定了，则RA-RNTI对于FDD则就固定了。此时，UE监听RA-RNTI加扰的PDCCH就可以获得RAR。而对于FDD，则RA-RNTI也不一定确定。或者，频域资源固定了，但时域资源可能是不固定的，此时，UE可能需要监听所有可能的时域和/或频域资源计算得到的RA-RNTI加扰的PDCCH。
当UE监听并解扰PDCCH之后，解码PDSCH，从而获得TA值。
在相关技术中随机接入是在授权载波上完成的，即按照基站配置或事先约定Preamble在基站配置或是约定的时域和/或频域资源上进行前导Preamble码的发送。而对于非授权载波上的随机接入，UE能够成功在基站配置或是事先约定的时域和/或频域资源上发送的Preamble码这完全取决于UE侧是否能够执行成功LBT机制和/或CCA检测，以及发送Preamble前导码的时域和/或频域资源足够多。
在本发明实施例中，涉及到的基站或UE在非授权载波上传输信息等操作时，基站或UE都需要先执行先听后说LBT机制或CCA检测，其中，该LBT机制可以采用本实施例中介绍的LBT机制或过程中之一。优选地，基站或UE为了发送随机接入过程中相关信息均可以采用简化的LBT机制或参数配置，例如，LBT Cat2或竞争窗小的LBT Cat4机制(最大竞争窗可以为1,2,3,4,5等)或无defer period的eCCA过程或无defer period的defer period+eCCA过程。
下面实施例将针对于UE在相应的时域和/或频域资源前未能竞争到非授权载波或执行LBT失败情况，给出一些增加或提高发送前导Preamble码机会或者增加发送前导Preamble码资源的方法，见下述实施例。
优选实施例二：
在该优选实施例中，提供了一种非授权载波上发送前导Preamble码的方法，即在eNB通知，或者，信令通知的，或者，预先约定好的时域和/或频域资源或时域和/或频域资源集合上发送前导Preamble码的方法。其中，发送Preamble码的时域资源(即上述第一预定时域和/或频域资源)可以是K子帧，或者，S个OFDM符号长度。其中，优选地，K优选地为1，2，3，S为2。频域上可以是连续的6个物理资源块(Physical Resource Block，简称为PRB)，也可以是占满整个带宽或整个带宽的80％的资源。
在非授权载波上发送前导Preamble码的方法如以下之一：
方法1：通过短控制信令SCS方式发送前导Preamble码。其中：发送Preamble码的时域和/或频域资源可以是eNB通知，或者，信令通知，或者，预先约定好的，或者，在预先预定好的时域和/或频域资源集合中对应的资源索引最小，最大，或，固定的一个资源索引或随机选择的资源。对于方法1，UE不用考虑当前或在时域和/或频资源位置的时刻点上信道是否已经被占用。
需要说明的是，这里的短控制信令SCS泛指的是不需要在非授权载波上执行先听后说LBT和/或空闲信道评估CCA检测，而直接发送短时的信号或信道的功能。在SCS时长内发送信号或信道，授权辅助接入(Licensed-Assisted Access，简称为LAA)接入点不需要执行先听后说LBT和/或空闲信道评估CCA检测功能，因此，为了保证非授权载波上不同系统和设备之间的友好共存，SCS发送的时长最好需要满足一定的管制要求。其中，有些地区和国家对于SCS可能有其他的名称和定义，而可能有些地区和国家没有定义SCS，针对这些地区和国家可以定义SCS以及类似规则(比如，发送时长的要求，在固定时长的观察期内发送时长不得大于设定比例)来进行发送非占用期的信号。此时，优选的，Preamble的发送按照类似format 4，每次发送符号长度仅占两个符号，或者，也可以占比两个符号长度短或者长的符号长度。
方法2：在发送Preamble码的时域和/或频域资源(即上述第一预定时域和/或频域资源)前，如果竞争到非授权载波，则可以在发送Preamble码的时域和/或频域资源上正常发送 Preamble。如果没有竞争到非授权载波，则在该发送Preamble码的时域和/或频域资源上停止发送Preamble。而等待下一个发送Preamble码的时域和/或频域资源(即上述第二预定时域和/或频域资源)，如果下一个发送Preamble码的时域和/或频域资源还没有竞争到非授权载波，则继续停止发送。
其中，上述发送Preamble码的时域和/或频域资源可以是物理层DCI通知或高层RRC信令通知或者事先预定的。方法2中的时域和/或频域资源可以为通知信令或是预定义的时域资源中的一个或是多个。不同的时域资源上的频域资源可以为相同，或者为不同，其可以按照信令通知或是事先约定的方式获取。
在PRACH时域和/或频域资源上发送Preamble码所进行的LBT机制和/或CCA检测的位置也可以紧邻发送Preamble码的时域和/或频域资源位置之前。其中，该紧邻发送Preamble码的时域和/或频域资源之前可以是前一子帧中的最后k个符号，或者，前一个或多个子帧，或者，执行LBT机制和/或CCA检测的位置在发送Preamble码的时域和/或频域资源前，位置不相邻，比如，执行LBT机制和/或CCA检测成功后且未到发送Preamble码的时域和/或频域资源(即上述近邻时域和/或频域资源)之间的空白，该UE可以发送该UE的PUSCH或者发送预留信号。其中，预留信号可以为整个带宽上部分资源，且具有一定的频域图样，即预留信号频域图样外的频域资源用于其他UE进行LBT机制和/或CCA检测。同样，在发送PUSCH资源上可以预留出特定的频域资源，为了避免PUSCH资源浪费，可以仅预留特定的RE，用于其他UE进行信道接入的LBT机制和/或CCA检测。
方法3：在发送Preamble码的时域和/或频域资源前，如果竞争到非授权载波，则可以在发送Preamble码的时域和/或频域资源上正常发送Preamble。如果没有竞争到非授权载波，则该发送Preamble码的时域和/或频域资源上停止发送Preamble，而在下一次竞争到非授权载波后，补充发送，但不要求一定是配置的发送Preamble码的时域和/或频域资源上，即为不规则发送。
优选实施例三：
在该优选实施例中，提供一种提高或增加前导Preamble码发送成功概率的方法。
针对非授权载波的特性(在某些地区管制要求中规定，在非授权载波上进行传输之前，必须执行LBT机制和/或CCA检测获得非授权载波的使用权才可以进行传输)，为了增加或提高前导Preamble码的发送成功率，可以采用下述之一的方式：
方式1：缩短发送Preamble码的PRACH时域资源(这里PRACH的时域和/或频域资源即为发送Preamble码的时域和/或频域资源)之间的间隔，或者，周期，或者，PRACH时域和/或频域资源密度。
假定授权载波或非授权载波上配置发送Preamble码的PRACH资源在每个无线帧中仅有一个时，比如，对于FDD系统，偶数帧中的特定子帧，如子帧索引1，或者，4，或者，7，则缩短PRACH资源的周期。即当UE在偶数帧0中的子帧索引号1或4或7之前执行LBT 机制和/或CCA检测失败，则可以触发UE在下一个帧(奇数帧)中的对应子帧索引号之前执行LBT机制和/或CCA检测，如果当前子帧(即PRACH时域资源)之前执行LBT机制和/或CCA检测成功，则可以发送前导Preamble码。反之，LBT机制和/或CCA检测失败，则继续在下个帧中对应的时域子帧位置之前继续尝试重新竞争非授权载波，目的是为了发送Preamble码。或者，在偶数帧中对应子帧1或4或7前执行LBT机制和/或CCA检测失败，则可以在偶数帧中子帧1或4或7后的连续或离散的多个子帧之前继续尝试竞争非授权载波，从而发送Preamble码，这里，能够发送Preamble码的前提是必须在这些子帧中任意一个子帧前执行LBT机制和/或CCA检测成功。而对于TDD，如果每个帧中特定子帧为PRACH时域资源，则可以缩短PRACH资源周期，即如果在无线帧中前半帧中有特定PRACH时域资源，则缩短PRACH资源出现的间隔，即该无线帧中的后半帧中对应的特定位置也可作为PRACH时域资源，此处可以不受限于现有的TDD固定上下行子帧配置，可以根据新的帧结构类型灵活确定上下行子帧数目或配比。或者，直接把执行LBT失败的PRACH资源后的一定时间窗内的子帧都配置为该UE的候选PRACH资源。其中，补充发送Preamble码的PRACH时域资源中的频域资源位置相对于预定或物理层信令或高层信令指示的PRACH时域资源中的频域资源位置可以是固定不变，或者，也可以改变。即，发送Preamble码的时域资源不同，但频域资源位置不同，或者，相同。
方式2：为了增加发送Preamble码的成功概率，也不增加eNB检测复杂度，则可以设计Preamble码发送窗(即上述时间窗)来增加Preamble码发送机会。Preamble码发送窗可以是位于预设或信令(物理层DCI或高层RRC信令)通知或UE和基站事先约定的PRACH时域资源之前，或者，之后，或者，包含，也可以是位于LBT机制和/或CCA检测时域位置之前，或者，之后，或者，包含LBT机制和/或CCA检测时域位置。同时，Preamble码发送窗(窗内为发送Preamble码的PRACH时域资源)与预设或信令(物理层DCI或高层RRC信令)通知PRACH时域资源可以是时域上连续，也可以在时域上不连续。优选地，该Preamble发送窗可以在预设或信令(物理层DCI或高层RRC信令)通知或UE和基站事先约定的PRACH时域资源之后或从预设或信令(物理层DCI或高层RRC信令)通知或UE和基站事先约定的PRACH时域资源起始位置之后连续的一段可发送Preamble码的时间段。Preamble码发送窗可以是一定时间段内存在一个或多个可能发送Preamble码发送时间点(即上述第三预定时域和/或频域资源，或候选时域和/或频域资源)，该时间段内多个发送Preamble码的时域资源位置可以在时域上连续，或者，时域上不连续。进一步，Preamble码发送窗内的可发送Preamble码的时域资源可以是时域上连续的一个或多个资源，也可以是时域上离散的一个或多个资源。如果在预设或信令(物理层DCI或高层RRC信令)通知或UE和基站事先约定的PRACH时域资源上没有竞争到非授权载波，可以在本PRACH时域资源之后的Preamble码发送窗内继续尝试发送。如果在时间窗内发送Preamble时域资源前执行LBT机制和/或CCA检测成功，则发送Preamble码，而下一次发送机会需要等到预设或信令(物理层DCI或高层RRC信令)通知或UE和基站事先约定的PRACH时域资源。反之，如果在时间窗内发送Preamble时域资源前执行LBT机制和/或CCA检测失败，则停止发送Preamble码，继续在时间窗内的下一个发送Preamble码时域资源前执行LBT机制和/或CCA检测，尝试重新发送Preamble码。而如果在Preamble码发送窗内没有竞争到非授权载波，即在发送Preamble窗内发送Preamble失败 或执行LBT机制和/或CCA检测失败，则下次发送Preamble码机会需要等到下一个预设或信令(物理层DCI或高层RRC信令)通知或UE和基站事先约定的PRACH时域资源。这里，PRACH时域和/或频域资源是用于发送前导Preamble码的资源。
其中，按照物理层DCI或高层RRC信令通知的PRACH资源或PRACH资源集合中之一进行Preamble发送。相关技术中的PRACH资源是在可用PRACH时域资源集合中按照等概率随机选择的，但介于能否发送Preamble码的前提是必须LBT机制和/或CCA检测成功，则需要在一定程度上限定PRACH时域资源的随机性，可用通过下述之一确定发送Preamble码的PRACH时域资源：
在可用PRACH时域集合中选择子帧索引号最小的子帧；或者，
在可用PRACH时域集合中选择子帧索引号最大的子帧；或者，
在可用PRACH时域集合中预设或某固定的子帧；或者，
选择LBT机制和/或CCA检测成功后的第一个资源作为PRACH时域资源；或者，
在LBT机制和/或CCA检测成功后的资源集合中随机选择或固定一个资源作为PRACH时域资源；或者，
在发送Preamble时间窗内随机选择；或者，
在发送Preamble时间窗内固定的一个；或者，
在发送Preamble时间窗内选择LBT成功后的第一个资源(一个或多个子帧或一个或两个及多个符号)；或者，
在发送Preamble码的时间窗内选择执行LBT和/或CCA检测成功后的某一固定资源或随机选择一个资源(一个或多个子帧或一个或两个及多个符号)；或者，
在可用PRACH时域资源集合或候选发送Preamble码的时域资源集合中，根据基站指示方式确定发送Preamble码的时域资源。
优选地，发送Preamble码的频域资源(即频域上发送Preamble码对应的频域资源块)的方式可按照以下之一确定：
等概率随机选择；或者，
选择频域资源索引号最小；或者，
选择频域资源索引号最大的；或者，
选择频域上Offset偏移量对应的资源；或者，
按照预定义的频域资源。这里的频域资源为频域上发送Preamble码对应的频域资源块索引。例如，一个时域资源中频域上有5个资源可以用于发送Preamble，相应的可用于发送 Preamble码的频域索引就有5个，假定选择频域资源索引最小的，即频域资源索引为0(即可用资源中第一个资源块)对应的资源块上发送Preamble。频域上一个资源块占用6个PRB。
特别指出的是，对于灵活上下行帧结构，每个子帧的属性(上行或是下行)可以灵活配置。基于此，PRACH信道可以位于指示的上行子帧中的每个上行子帧，或，奇数上行子帧，或，偶数上行子帧上配置。其中，在选定子帧中发送Preamble前导码的频域资源位置可以按照上述方法。
此外，上述的发送Preamble码的时间窗可以由下述参数至少之一构成：时域偏移量1(即上述第一时域偏移量)(即偏移量1为配置的发送Preamble码时域资源到时间窗起点之间的距离)、时间窗内候选发送Preamble码时域资源起点与时间窗起点之间的偏移量，即为偏移量2(即上述第二时域偏移量)，窗内发送Preamble码时域资源大小和数目，时间窗长，时间窗的起点(即为配置的发送Preamble码时域资源后加上偏移量1对应的时刻)，发送Preamble码时域资源间间隔。
下面将举例说明方式2中描述的方法：下面举例采用的是时间窗起点从配置的发送Preamble码对应的时域资源位置起点开始，但下述方法同样也适用于时间窗起点从配置的发送Preamble码对应的时域资源位置结束开始。也就是说，时间窗位置以及窗内候选PRACH时域资源图样可以是由在配置的发送Preamble码对应的时域资源位置前执行LBT机制和/或CCA检测失败而触发，也可以是由物理层DCI信令通知，或者，高层RRC信令通知，或者，预先配置好，或者，基站和UE事先约定。
假设发送Preamble码的PRACH时域位置已确定，比如，某个无线帧中的子帧为7。则Preamble码的发送窗可以为以下之一：
一种是Preamble码的发送时间窗内候选的PRACH时域资源是时域连续的。图5是根据本发明实施例的发送Preamble码时间窗内的PRACH资源为时间上连续的示意图，如图5所示，即Preamble码发送时间窗起点是从当前PRACH时域资源开始，下个PRACH时域资源开始之前。其中，时间窗可由若干个发送Preamble duration组成，Preamble duration时长可以是一个子帧，二个子帧或三个子帧，或者，几个符号。对于某个UE发送Preamble的次数或者连续用于发送Preamble码执行LBT机制和/或CCA检测失败的次数达到预设门限值时，则该UE停止尝试发送Preamble码。预设门限值可以是预定义，或者，基站和UE事先约定，或者，物理层信令通知，或者，高层信令通知，或者，基站通知UE方式获取。
即如果UE在配置的PRACH时域资源之前竞争到非授权载波，则在该PRACH时域资源上正常发送Preamble码。而如果在当前PRACH时域资源之前没有竞争到非授权载波，则UE可以在Preamble码时间窗内候选的用于发送Preamble码的时域资源前重新尝试竞争非授权载波，即，UE尝试在时间窗内的下一个PRACH时域资源之前继续执行LBT机制和/或CCA检测，如果成功竞争到非授权载波的使用权，则UE在此PRACH资源上发送，即补充发送Preamble码。如果没有竞争到非授权载波使用权，则UE继续尝试在时间窗内下一个PRACH时域资源之前继续执行LBT机制和/或CCA检测，若LBT机制和/或CCA检测成功，则在当 前PRACH资源上发送Preamble码。反之，若LBT机制和/或CCA检测失败，则继续在时间窗内候选的PRACH时域资源上尝试执行LBT机制和/或CCA检测而发送Preamble码，直到时间窗结束。如果UE在当前时间窗内一直未能竞争到非授权载波，则在下一个配置的PRACH资源和/或时间窗内再尝试发送。其中，配置的PRACH资源可以是预设，或者，物理层信令DCI，或者，高层RRC信令通知确定。可选的，如果配置的是PRACH时域资源集合，则可以按照本实施例中提供的PRACH时域资源选择方法确定。
该情况下，Preamble码发送窗内候选的发送Preamble码的时域资源是由若干个时域上连续的PRACH时域资源组成。
另一种是Preamble码发送窗中PRACH资源在时域上不连续。其中，候选发送Preamble码的PRACH资源可以是等间隔，或者，不等间隔的。
图6是根据本发明实施例的发送Preamble码时间窗内的PRACH资源为时间上离散等间隔的示意图，如图6所示，候选发送Preamble码的PRACH资源等间隔。其中，Preamble码发送时间窗可能包含配置的PRACH时域资源，也可能没有包含。此外，时间窗在配置的PRACH资源之前的方法也同理。
情况1：如图6所示，假定配置的PRACH资源为发送时间窗内的第一个PRACH资源，如果UE在配置的PRACH时域资源上竞争到非授权载波，则在配置的PRACH时域资源上正常发送Preamble码，频域资源可以随机选择，或者，预先定义的，或者，固定的确定的，或者，可用频域资源索引中最小，或者，最大。如果在配置的PRACH时域资源上没有竞争到非授权载波，则UE尝试在时间窗内下一个PRACH时域资源上发送Preamble码。如果竞争到下一个PRACH时域资源，则该时域资源上发送，频域资源位置可以不变，或者，改变。反之，如果没有竞争到下一个PRACH时域资源，则停止在该PRACH时域资源上发送Preamble码。在时间窗内再下一个PRACH资源上继续执行LBT机制和/或CCA检测，尝试发送Preamble码，直到时间窗结束。如果在时间窗内一直未能竞争到非授权载波，则UE只能等待下一个配置的PRACH资源。这里，时间窗内候选的用于发送Preamble码的PRACH时域资源在时域上是离散的。此外，在候选的PRACH时域资源上发送Preamble码所执行的LBT位置可以为候选的PRACH时域资源的前一子帧中的末尾位置(一个或多个符号)。具体也可以参考以下优选实施例四中关于LBT或CCA检测位置描述。
此外，时间窗内候选的Preamble码也可以由等间隔离散的PRACH时域资源大小，或者，不等间隔的PRACH时域资源大小组成。
情况2：时间窗内离散PRACH资源上增加发送Preamble码的方法还包括：在离散的候选PRACH资源之间再增加PRACH备用资源，图7是根据本发明实施例的时间窗内在离散PRACH资源上之间再增加PRACH备用资源的示意图，如图7所示。
与情况1不同之处，如果UE在配置的PRACH资源上没有竞争到非授权载波，且时间长窗内第一个发送Preamble码的候选PRACH时域资源位置未到，则在配置的PRACH时域资源之后，时间窗内第一个候选PRACH时域资源之前的时域资源上继续尝试发送Preamble，如果 执行LBT机制和/或CCA检测成功，则在当前时刻点上发送Preamble码。优选地，配置的PRACH之后第一个时域资源上新增发送Preamble码的机会。
情况3：在发送Preamble发送窗内依然未能竞争到非授权载波，可在发送窗后额外增加PRACH时域资源，图8是根据本发明实施例的在Preamble发送窗后额外增加PRACH时域资源的示意图，如图8所示。其中，时间窗内的PRACH duration可以是连续或不连续。上述PRACH duration时域资源可以是1,2,3个子帧长度，或者，k个OFDM符号长度。
还有一种情况是：根据LBT机制和/或CCA检测位置确定发送Preamble码的PRACH时域资源。
如果执行LBT机制和/或CCA检测的时域位置确定，则UE在可能的LBT机制和/或CCA检测时域位置上竞争非授权载波的使用权，如果竞争到非授权载波的使用权，则在LBT机制和/或CCA检测成功后的k个完整OFDM符号，或者，一个或多个子帧上发送Preamble码。如果LBT机制和/或CCA检测成功时刻未到符号或子帧边界，则需要发送预留信号或占用信号。Preamble码的发送完全取决于LBT机制和/或CCA检测位置。
再还有一种情况是：不限定LBT机制和/或CCA检测位置，根据LBT或CCA成功时刻确定发送Preamble码的PRACH时域资源。
如果不限制LBT机制和/或CCA检测位置，则UE可以在任意时刻开始执行LBT过程，而在LBT机制和/或CCA检测成功时刻后的k个完整OFDM符号，或者，一个或多个子帧上发送Preamble码。如果LBT机制和/或CCA检测成功时刻未到符号或子帧边界，则需要发送预留信号或占用信号。Preamble码的发送完全取决于LBT机制和/或CCA检测开始时刻和/或成功时刻，与配置的PRACH或可用PRACH资源无关，或者，也可以有关(即LBT机制和/或CCA检测成功后的第一个时域资源恰好为PRACH资源)。
此外，根据发送前导Preamble码所执行LBT失败的次数是否达到预设的门限值，调整UE发送前导Preamble码的LBT竞争窗大小或LBT机制。比如，假定预设的门限值为3，则如果UE连续采用最大竞争窗为15的LBT过程进行前导Preamble码发送，则在第三次LBT失败后，立马减少执行LBT所采用的竞争窗为7。以此类推，直到竞争窗已经调整到最小值或直到前导Preamble码发送窗结束或预设可发送前导Preamble码的最大次数，UE依然未能获取到非授权载波而发送前导Preamble码，则停止执行LBT，直到下一个发送前导Preamble码的时域和/或频域资源，或时间窗。反之，如果UE在调整LBT竞争窗大小后，成功接入到非授权载波并发送前导Preamble码，则恢复到最初的竞争窗大小。或者，也可以根据LBT失败的次数可以调整执行LBT的机制。若开始采用LBT Cat4(如，defer period+eCCA过程)，且LBT失败次数大于预设值，则可以采用无随机回退机制或简化的LBT，如，LBT Cat2，eCCA过程(当检测到信道忙时，可以进入defer period或不进入defer period)。或者，在发送前导Preamble码的时域和/或频域位置前未能完成LBT过程，则如果当前N值满足预设门限值，或者，最后一次CCA检测空闲，则可以认为传输设备获取到非授权载波的使用权。
其中，所述预设门限值可以通过基站指示，或者，预定义，或者，基站和UE事先约定的 方式获取。
优选实施例四：
在该优选实施例中，提供一种前导Preamble码发送所执行LBT机制和/或CCA检测的位置与PRACH的循环前缀(Cyclic Prefix，简称为CP)和保护间隔(Gap Time，简称为GT)之间的关系，以及不同用户设备UE之间复用PRACH资源的方法。(可选的，可以增加PRACH资源结构设计)
对于Format0～3，PRACH信道时域上分别占用1，2，2，3个子帧。其中：PRACH信道是由CP，Preamble前导和GT组成。CP是用于保证接收机可以进行频率检测，并抵抗符号间干扰。GT是用来避免与其他用户设备UE产生干扰的。
其中：对于PRACH时域位置之前为UpPTS情况，为了保证符号间不受干扰，用户设备UE或是用户设备组中的UE执行LBT机制和/或CCA检测的区域为部分或全部UpPTS，或者，部分/全部GP和/或UpPTS，或者，部分/全部DwPTS和/或GP和/或UpPTS，或者，下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS，或者，部分或全部UpPTS和/或部分或全部CP时间，或者，部分或全部GP和/或UpPTS和/或部分或全部CP时间，或者，部分或全部DwPTS和/或GP和/或UpPTS和/或部分或全部CP时间，或者，下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS和/或部分或全部CP时间。k为不小于1的正整数。
而对于PRACH时域位置之前为上行子帧情况，进一步地，如果前一个子帧是PRACH子帧，则CCA检测位置可以为上一个子帧中的PRACH信道的部分或全部GT时间，或者，部分或全部GT和/或当前PRACH子帧的部分或全部CP时间，其中：CCA检测的起始点可以是从GT的起点或是GT中某一位置。图9是根据本发明实施例的Format 0～3下发送Preamble码时执行LBT机制和/或CCA检测位置示意图，如图9所示。
而如果前一子帧为上行子帧，且该上行子帧中无PRACH信道，则CCA检测位置限定可以为上一子帧的最后k个OFDM符号，或者，k个OFDM符号和/或当前子帧(PRACH子帧)中部分或全部CP，或者，PRACH子帧之前的一个或多个子帧和/或当前子帧(PRACH子帧)中部分或全部CP。
Format4仅适用于TDD系统，且PRACH信道时域上占用UpPTS长度，图10是根据本发明实施例的Format 4下发送Preamble码时执行LBT机制和/或CCA检测位置示意图，如图10所示，则对于Format4下的Preamble码在非授权载波对应的资源上发送之前，执行CCA检测的位置可以为下述之一：
部分或全部GP时间；或者，
部分或全部GP和/或部分或全部CP时间；或者，
部分或全部DwPTS和/或GP和/或部分或全部CP时间；或者，
下行子帧中最后k个符号和/或DwPTS和/或GP和/或部分/全部CP时间。
上述中的部分资源时间可以为占时间中x％对应的时间。例如，部分CP时间即为整个CP时间中的x％对应的时间，起点为CP区域的起始位置，结束点为从CP开始到CP时间x％的点。x为[0,100]之间的数。
优选地，发送Preamble码所执行的LBT或CCA检测的频域位置，可以整个带宽上检测，或者，整个带宽上的部分资源位置上检测。其中，部分资源可以具有一个频域图样的资源，优选地，该资源可以是RE级，或者，PRB，或者，RBG，或者，子带级。例如，频域资源上奇数资源索引对应的资源组成的图样用于用户设备在其对应资源上进行LBT或CCA检测。其余资源上可以发送PUSCH和/或GT和/或CP。即GT和/或CP在频域上时按照一定频域图样进行发送的。
可以根据不同的CCA检测区域配置不同的LBT机制，其中LBT机制可参考实施例一中的LBT机制介绍。
对于上述各种情况，UE在发送Preamble码时域资源边界之前未完成LBT过程，则在CP中可以继续执行LBT过程，或者，为了保证符号间不受干扰，在CP中只要检测到一个预设CCA duration时间内信道空闲，则认为获取到非授权载波的使用权，从而在对应的时域和/或频域位置发送Preamble前导码。此时，新的CP长度(截短的CP)为原CP长度减去CCA duration时间。特别地，对于在GT内执行CCA检测的情况，此时，新的GT长度是原GT长度减去CCA开始到GT边界时间。
此外，为了多个不同的用户设备UE能在相同的时域资源和/或频域资源上进行复用，可通过下述方式来实现：
基于上述对于不同Format格式下的CCA检测位置限定，当用户设备UE完成LBT过程的时刻未到发送Preamble的时域资源位置，则用户设备UE需要发送预留信号或占用信号或初始信号，用于其他用户设备UE进行识别。其中，预留信号或是占用信号或是初始信号的时域长度为：LBT机制和/或CCA检测成功时刻到PRACH资源子帧起点；或者，LBT机制和/或CCA检测成功时刻到PRACH资源子帧中部分或全部CP；或者，LBT机制和/或CCA检测成功时刻到子帧或符号边界。如果LBT机制和/或CCA检测成功时刻后第一个时域资源不是PRACH资源，则UE可以发送PUSCH或PUCCH或SRS信号直到PRACH资源子帧起点。预留信号或是占用信号或是初始信号频域上可以是全带宽发送，或者，整个带宽中的部分频域资源上发送。部分频域资源可以是频域上等间隔或不等间隔的资源单元(Resource Element，简称为RE)/PRB/资源块组(Resource Block Group，简称为RBG)/子带资源。这里，假定同运营商中的UE共享相同的预留信号或占用信号或初始信号图样(或者，共享相同的LBT机制和/或CCA检测频域图样，即预留信号之外的部分或全部频域资源构成的图样)，检测的用户设备UE(即待复用资源的UE)在部分频域资源以外LBT机制和/或CCA检测资源上检测到信道空闲(比如，在LBT机制和/或CCA检测对应图样的资源上检测到信道能量小于CCA门限为A)，则认为信道没有其他系统存在。而在预留信号或占用信号或初始信号图样对应的 资源或整个带宽上检测到的能量，如果接收到的能量小于预设CCA检测门限B(其中，CCA检测门限A和B可以相同或不同，即CCA检测门限B比CCA检测门限A大)，或者，大于CCA检测门限A而小于CCA检测门限B时，则认为是同运营商的UE占用，即认为获取到非授权载波的使用权，可以复用，即可以一起复用资源进行各自Preamble码的发送。其中，发送Preamble码的时域和/或频域资源可以不同，或者，相同。同运营商下不同小区下的UE也可以具有不同的预留信号或占用信号或初始信号图样，即不同小区的UE的CCA检测图样是频分的，如果在对应的CCA检测图样上检测到信道空闲，则用户设备可以在所述CCA检测图样外的频域资源上发送预留信号，或者全带宽发送，这时，检测的UE或待复用资源的UE在对应预留信号或占用信号或初始信号图样，或者整个带宽上接收并进行解析，如果解析(可以是接收并解码预留信号内容，或者，仅通过接收的能量判别信道是否空闲或是否为同小区或同运营商中UE占用)出该信号时本小区的UE发送，则可以在后续的PRACH资源上进行自身Preamble码的发送。或者，占用信道之后，频域资源也可以由预留信号图样和CCA图样和空余资源或PUSCH资源中至少之一组成。这里的CCA图样用于其他检测的UE进行信号识别，从而进行资源复用。此外，预留信号或占用信号或初始信号中可以携带指示消息，或者，UE ID或小区ID或运营商标识等，预留信号也可以发送SRS序列。其中，预留信号还可以是CP或GT或PUSCH或SRS等。
此外，执行LBT或CCA成功的UE可以在LBT或CCA成功时刻之后且发送Preamble码的时域资源之前空白发送预留信号，且预留信号具有一定的频域图样(例如，在特定频域位置上发送预留信号，空余频域的特定资源用于其他UE执行LBT或CCA检测)。而在用户设备UE发送Preamble码的时域资源内的频域资源外发送PUSCH，其中，PUSCH中频域上可以muting静默特定的资源，用于其他UE执行LBT或CCA检测。该特定资源可以是RE级，或，PRB，或，RBG，或，子带级。优选地，为了避免资源浪费，仅在特定的RE资源上不发送PUSCH或任何信息或信号。也可以在发送CP或GT对应的频域上预留特定的资源，用于其他UE执行LBT或CCA检测。在所述用于执行LBT或CCA检测的频域资源上检测到能量信道能量小于CCA门限为A，则认为信道没有其他系统存在。而在LBT或CCA对应的频域资源外或整个带宽上检测到的能量小于预设CCA检测门限B(其中，CCA检测门限A和B可以相同或不同，可选地，CCA检测门限B比CCA检测门限A大)，或者，大于CCA检测门限A而小于CCA检测门限B时，则认为是同运营商或同小区的UE占用，即认为获取到非授权载波的使用权。
优选地，当多个用户设备同时需要在时域位置发送各自的Preamble前导码时，则为了公平起见，不同的UE可随机或固定的选择不同的CCA检测起点位置开始CCA检测。
优选地，可以设计新的PRACH信道结构，对于LBT机制和/或CCA检测和PRACH共存的情况(即共存在一个或多个子帧或一个或二个或多个符号内时)，则可以缩短PRACH信道时域长度，可选地，频域资源可以扩展增大。即LBT机制和/或CCA检测和PRACH时域资源通过时分方式共存。或者，LBT机制和/或CCA检测和PRACH时域资源通过频分方式共存。对于后者，执行LBT机制和/或CCA检测成功的UE在PRACH资源(这里的PRACH时域位置可以是与LBT成功时刻同子帧的PRACH资源，此时，可以发送Preamble码采用format4 格式)，或者，LBT成功时刻后的子帧，优选地，LBT成功时刻后的第一个或多个子帧上)上发送Preamble码，而检测的UE在PRACH资源以外的频域资源上的部分或全部资源上进行LBT机制和/或CCA检测，如果检测到信道空闲，则在下一个PRACH资源上发送自身的Preamble。其中，PRACH所在时域资源上频域资源可以由PRACH频域资源，CCA检测频域资源，PUSCH，预留信号，空白至少之一组成，这些组成元素之间是通过频分方式共存的。
优选实施例五：
在该优选实施例中，提供一种非授权载波上的基于竞争的随机接入方法，具体可以通过以下之一的方式实现基于竞争的随机接入过程。
方式1：
步骤1：UE在非授权载波上发送消息或进行传输之前，需要执行先听后说LBT或空闲信道评估CCA。如果竞争到非授权载波，则UE进入步骤2。如果没有竞争到非授权载波，则UE不能在该非授权载波上进行信息发送。一个特殊情况为，UE可以不用执行LBT机制和/或CCA检测而获取非授权载波使用权，而采用短控制信令SCS方式进行消息发送。
步骤2：在竞争到非授权载波之后，UE进行Msg1_1消息的发送。其中，Msg1_1消息包括Msg1消息(Msg1消息主要是发送Preamble码)和后续Msg3消息中的部分信息。UE发送Msg1_1包含的消息在特定的时域和/或频域资源上。这里，UE可以在一个时域和/或频资源上发送Msg1消息，即在一个时域和/或频域资源上发送前导Preamble码，而在另一个时域和/或频域资源上发送后续Msg3消息中部分信息。该一个时域和/或频域资源和另一个时域和/或频域资源可以是时域相同，频域不同，或者，时域不同，频域相同，或者，时域不同，频域不同。此外，UE也可以在同一个时域和/或频域资源上发送Msg1_1中的内容。为了避免多个UE之间在同一个时域和/或频域资源上发送消息造成碰撞，从而使得基站无法正确解码消息内容，因此，优选地，采用Msg1_1中的Preamble码和后续Msg3中部分消息采用不同的时域和/或频频域资源进行传输。
发送Preamble码的时域和/或频域资源通过物理层信令DCI，或者，高层RRC信令，或者，预定义，或者，eNB和UE事先约定获得，也可以根据LBT机制和/或CCA检测成功时刻确定，即LBT机制和/或CCA检测成功时刻后的第一个可用时域和/或频域资源上发送Preamble码。时域资源可以是一个或多个子帧，或者k个OFDM符号。频域资源占L个PRB。其中，k为一个正整数，优选地，k为2。L为[1,100]之间的任意一个正整数，优选地，L为6。
Preamble码与TC-RNTI有对应关系，或者，UE ID与Preamble码对应，或者，UE ID与TC-RNTI对应，或者，UE ID与Preamble码与TC-RNTI之间有对应关系。Preamble码可以是按照现有规则确定，或者，预先定义，或者，eNB和UE事先约定，或者，高层RRC通知，或者，物理层DCI通知的一个Preamble码。该现有规则为按照Msg3消息和路损等确定。
发送部分Msg3消息的时域和/或频域资源可以通过预定义，或者，eNB和UE事先约定，或者，eNB指示，或者，高层RRC通知，或者，物理层DCI通知，或者，与发送Preamble 码的时域资源相同，但频域上隐含一个Offset偏移量，或者，与发送Preamble码的时域资源不同(比如，时域上与发送Preamble码的时域资源偏移一个Offset1偏移量)，但频域上可以相同，或者，不同。优选地，发送部分Msg3消息的时域资源与发送Preamble码的时域资源相同，频域上偏移一定的Offset偏移量，或者，两个资源在时域上相邻，频域上可以采用相同的位置。该Offset偏移量至少为发送Preamble码频域资源到Preamble码可用频域区域边界。也就是说，优选地，发送部分Msg3消息的频域资源为发送Preamble码可用的频域资源外的频域资源。这里，部分Msg3消息的时域和/或频域资源不仅局限于上述时域和/或频域位置。
Msg3中的部分消息可以是下述至少之一：UE ID，或者，C-RNTI，或者，RRC请求，或者，SR，或者，BSR。
UE在发送Msg3的时域和/或频域资源上发送后续Msg3中的部分消息。其中，传输信道和/或控制信道采用与Preamble码对应的TC-RNTI，或者，按照eNB配置给UE的TC-RNTI进行加扰或加掩码。TC-RNTI可以由eNB和UE事先约定获取，或者，由eNB通过授权载波配置/通知UE，或者，通过非授权载波配置/通知给UE，或者，预定义，或者，高层RRC信令通知给eNB和/或UE获取，或者，物理层DCI信令通知给eNB和/或UE获取，或者，由MAC层信令通知获取。
本步骤中携带部分Msg3消息的目的在于非授权载波的使用是基于LBT机制和/或CCA检测结果，具有一定的不确定性，所以，一旦获取到非授权载波的使用权，则尽可能的提前发送一些有用信息，如，需要的资源大小，业务量大小等信息，便于eNB在收到该消息后分配更加合适的资源。
步骤3：eNB接收上述Preamble码和部分Msg3消息之后，向UE发送一个响应消息，如，响应消息(如，RAR相应和/或竞争结果响应消息)中包含TA以及下述消息至少之一：
TC-RNTI信息。这里，eNB下发的TC-RNTI可以是事先与UE约定好的(如步骤2中用于加扰的TC-RNTI)，或者，eNB为UE发送的新的TC-RNTI。
上行授权消息。该上行授权消息中分配的资源可用于Msg3中剩余消息的发送。
Preamble Index。
C-RNTI。这里的C-RNTI是用于当步骤2中携带了C-RNTI消息时，为了确定该UE是否竞争成功。
eNB根据接收到的Preamble码的时域和/或频域资源位置计算得到RA-RNTI，然后采用RA-RNTI对RAR中对应的PDCCH中CRC进行加扰。相应地，eNB还需要在发送部分Msg3消息的时域和/或频域资源上接收部分Msg3信息，采用预定义，或者，UE ID对应的TC-RNTI，或者，Preamble序列对应的TC-RNTI，或者，eNB和UE事先约定的TC-RNTI进行解扰，从而获得部分Msg3消息。
eNB发送响应消息(如，RAR和/或竞争结果)，可以通过授权载波，或者非授权载波。 对于后者，eNB需要先执行LBT机制和/或CCA检测，成功竞争到非授权载波之后，才可以发送相应的响应消息。
步骤4：UE接收eNB发送的响应消息，并在对应的UL grant对应的资源上发送剩余的Msg3(本实施例中，即剩余的Msg3消息可以认为是新的Msg3，因为消息内容与原来不同)消息。
即UE采用自身的RA-RNTI进行PDCCH解扰，进而解码PDSCH。如果获得的Preamble Index与自身的Preamble一致，则接收成功。获取TA，TC-RNTI和UL grant等消息。
如果UE采用TC-RNTI解扰，进而获得与自身发送资源大小请求，和/或，C-RNTI一致的信息，则可认为随机接入竞争成功。
本步骤中，UE在进行新Msg3消息发送加扰可以采用eNB发送响应消息中的TC-RNTI(即更换原来的旧TC-RNTI而采用新TC-RNTI)，或者，依然采用步骤2中的TC-RNTI(即旧TC-RNTI)。这里对传输信道进行加扰旧的TC-RNTI可以通过以下方式获取：预定义，或者，UE ID对应的TC-RNTI，或者，Preamble序列对应的TC-RNTI，或者，eNB和UE事先约定。在UL grant中分配的资源上发送剩余的Msg3消息，比如，UE ID，SR，C-RNTI或RRC请求，切换请求，BSR等之一。
步骤5：eNB根据接收到的新的Msg3，发送Msg4。
eNB接收新的Msg3消息，并用更换后的新TC-RNTI，或者，旧的TC-RNTI(即预定义，或者，UE ID对应的TC-RNTI，或者，Preamble序列对应的TC-RNTI，或者，eNB和UE事先约定的TC-RNTI)进行解扰，并在给UE发送的Msg4中携带新的Msg3中的C-RNTI，或者，Msg1_1中携带的C-RNTI或UE ID，或者TC-RNTI。
步骤6：UE确定是否随机接入成功。即通过比较Msg4中携带C-RNTI，和/或，TC-RNTI，和/或UE ID确定是否成功。
方式2：
步骤1：UE在非授权载波上发送消息之前，需要进行先听后说LBT或空闲信道评估CCA。如果竞争到非授权载波的使用权，则UE进入步骤2。如果没有竞争到非授权载波使用权，则UE不能在该非授权载波上进行信息发送。一个特殊情况为，UE可以不用执行LBT机制和/或CCA检测而获取非授权载波使用权，而采用短控制信令SCS方式进行消息发送。
步骤2：UE在LBT机制和/或CCA检测成功后的时域和/或频域资源上发送Msg1_M，其中，Msg1_M包括：Msg1和Msg3。也就是说，UE在竞争到非授权载波后，采用一步法则将前导Preamble码和Msg3中的信息等一起发送。
该Msg1消息是用于发送Preamble码。其中，该Preamble码可以与UE ID对应，或者，预定义，或者，与TC-RNTI对应，或者，eNB与UE约定，或者，信令(物理层信令DCI或高层RRC信令)通知。而发送Msg1的时域和/或频域资源可以通过物理层信令DCI，或者， 高层RRC信令，或者，预定义，或者，eNB和UE事先约定获得。也可以根据LBT机制和/或CCA检测成功时刻确定，即LBT机制和/或CCA检测成功时刻后的第一个可用时域和/或频域资源上发送Preamble码。时域资源可以是一个或多个子帧，或者k个OFDM符号。频域资源占L个PRB。其中，k为一个正整数，优选地，k为2。L为[1,100]之间的任意一个正整数，优选地，L为6。
Msg3消息包括下述至少之一：UE ID，或者，C-RNTI，或者，RRC请求，或者，切换消息，或者，SR，或者，BSR等。
发送Msg3消息的时域和/或频域资源可以通过预定义，或者，eNB指示，或者，高层RRC通知，或者，物理层DCI通知，或者，与发送Preamble码的时域资源相同，但频域上隐含一个Offset偏移量，或者，与发送Preamble码的时域资源不同(比如，时域上与发送Preamble码的时域资源偏移一个Offset1偏移量)，但频域上可以相同，或者，不同。优选地，发送部分Msg3消息的时域资源与发送Preamble码的时域资源相同，频域上偏移一定的Offset偏移量，或者，两个资源在时域上相邻，频域上可以采用相同的位置。该Offset偏移量至少为发送Preamble码频域资源到Preamble码可用频域区域边界。也就是说，优选地，发送Msg3消息的频域资源为发送Preamble码可用的频域资源外的频域资源，时域资源与发送Preamble码时域资源相同，或者，为时域资源中的一部分。这里，Msg3消息的时域和/或频域资源不仅局限于上述时域和/或频域位置。
其中，发送Msg3消息相应的传输信道采用TC-RNTI进行加扰。TC-RNTI可以为预定义，或者，UE ID对应的TC-RNTI，或者，Preamble序列对应的TC-RNTI，或者，eNB和UE事先约定的TC-RNTI。
步骤3：eNB接收Msg1_M消息之后，eNB发送一个Msg2_M消息，即发送一个响应消息，如，响应消息(如，RAR相应和/或竞争结果响应消息)中包含TA以及下述消息至少之一：
TC-RNTI信息。该TC-RNTI可以用于该UE在下一次随机接入时使用。
上行授权(Uplink grant，简称为UL grant)消息。该上行授权消息可以用于该UE本次使用或下次随机接入时使用。
Preamble Index。
C-RNTI。该C-RNTI为UE上报Msg1_M中携带的内容。
UE ID。该UE ID为UE上报Msg1_M中携带的内容。
其中，对应的RAR中对应的PDCCH中CRC可以用RA-RNTI加扰。
步骤3中基站发送上述响应消息可以在授权载波上或非授权载波上。
步骤4：UE接收eNB发送的上述响应信息，并确定随机接入是否成功。UE可以在发送上述Msg1_M消息后+k子帧之间接收上述响应消息，其中，k为正整数，优选地，k为3，4， 5，6，7，8，9等。
UE在发送Preamble码对应的时域和/或频资源上和/或对应的控制信道和/或对应的PDSCH信道上解码响应消息，从而获取TA值，和UL grant，C-RNTI，UE ID。如果UE解码成功，可通过比较C-RNTI或UE ID确定是否自己随机接入成功。若解码得到的C-RNRI或UE ID与自身一致，则随机接入成功。
在本发明实施例中，涉及到发送前导Preamble，或者，基站或UE侧在非授权载波上发送的相关信令或消息，如，前导Preamble，PDCCH order触发信令，Msg1，Msg2，部分或全部Msg3，Msg4，SRS或PUSCH等所需要执行的先听后说LBT机制/空闲信道评估CCA，可按照以下之一LBT机制或过程：LBT Cat4(包括两种：一种是在eCCA过程中检测到slot内信道忙，进入defer period。另一种是在eCCA过程中检测到slot内信道忙，不进入defer period。)；或者，LBT Cat2，或者，增强型LBT Cat2，或者，直接eCCA过程(包括两种：一种是在eCCA过程中检测到slot内信道忙，进入defer period。另一种是在eCCA过程中检测到slot内信道忙，不进入defer period。)。根据非授权载波上下行传输采用LBT Cat4机制，且竞争窗较大，例如，7,15,31,63,127,255,511,1023等，而基站为了在非授权载波上发送随机接入触发信令PDCCH order可以执行竞争窗小的LBT Cat4(例如，竞争窗可以为1,2,3,4,5,6,7,8,9,10,11,12等)或简化的LBT机制(如LBT Cat2)。
其中，LBT Cat4(即defer period+eCCA过程)的流程大体为：
传输设备(如，eNB或UE)在defer period内检测到信道空闲，则可以进行下行传输。和/或，
传输设备(如，eNB或UE)在defer period内检测到信道空闲后，按照下述步骤直到随机回退值N递减到0时，则可以进行下行或上行传输。
Step1：设置初始随机回退值N。
其中，随机回退值N可以是在[0,CWp]之间均匀分布或二项分布随机产生的一个数，或者，也可以是基站指示N值，或者，预定义N值。CWp是介于CWmin和CWmax之间的随机数，其中，CWmin为不小于1的正整数，CWmax最大值为1024。优选地，CWmax可以为1，2，3，4，5，6，7，11，15，31，63，127，255等。
Step2：判断当前N值是否大于0。如果判断结果N大于0，则N值进行递减特定数量的操作。
其中：特定数量可以是基站配置，或者，预定义。优选地，特定数量为1，即N＝N-1操作。
Step3：设备检测slot内的信道空闲状况，如果在slot内检测到信道空闲，则进入Step4。反之，如果在slot内检测到信道忙，进入Step5。或者，不进入Step5，直接重复Step3
Step4：判断当前N值是否等于0，如果等于0，则停止进行信道检测，认为获取到非授 权载波的使用权。反之，如果N不等于0，则转向Step2。
Step5：检测defer period内信道空闲状况。如果在defer period内检测到信道空闲，则转向Step2。反之，如果在defer period内检测到信道忙，则重复执行Step5。defer period可以有一个固定duration长度加上n乘以slot组成。n为大于等于0的数，优选地，n为0，1，2，3等。slot长度为9us，固定的duration时长为16us。
LBT Cat2的流程大体为：CCA检测开始时刻可以是固定，或者，动态可变，或者，在特定的区间内若干个小时间段内随机选择，或者，在特定的区间内若干个小时间段内配置固定位置。若检测信道从忙变闲，且连续检测信道空闲时间不小于预设CCA duration长度，则认为获取到非授权载波的使用权。对于本发明，优选地，eNB下发DCI可以采用LBT Cat2进行信道接入。其中，CCA duration时长可以16us+n*slot时长，n为大于等于0的整数，优选地，n为1，2，3等。slot时长为9us。即CCA duration可以为16us，或者，25us，34us等，还可以为9us，或，4us。
增强的LBT Cat2，与LBT Cat2的区别在于，CCA检测的起点可以在一定时间段内随机选择。有利于异步系统间竞争接入信道的公平性和使CCA检测起点早的传输设备提前竞争接入信道。例如，假定一定时间段为10，可以分为10小段，每个小段占用1份，则传输设备1可以在10小段中的第3小段起点作为自己CCA检测的起点，而传输设备2则可以固定配置10小段中的第7小段起点作为自己CCA检测的起点。即不同传输设备可以随机选择CCA检测起点，也可以固定配置不同的起点位置。
直接eCCA过程。即eCCA过程是由N个slot过程，以及当slot检测到信道忙时，进入defer period或不进入defer period组成。N为随机回退值，N在[0,CWp]之间随机产生的一个整数，CWp在[CWmin,CWmax]之间随机产生的一个整数。此外，N可以是基站指示给UE，或预定义。优选地，N可以为1，2，3。最大竞争窗CWmax可以为[1,63]之间的正整数。具体eCCA过程为：
步骤1：产生随机回退值N。
步骤2：判断当前N是否大于0。如果大于0，则进入步骤3。如果等于0，则认为获取到非授权载波使用权。此时，如果UE还没有执行一次slot检测，或，没有进入到eCCA过程，则需要重设随机回退值N，进入步骤1。
步骤3：传输设备在slot内检测信道是否空闲，如果信道空闲，则进入步骤4。或者，如果检测到信道忙，则进入defer period，即步骤5，或者，直接不进入defer period，而直接重复步骤3。
步骤4：执行N值递减一定数量值操作。其中，一定数量值可以是预定义，或，基站指示，或，基站和UE事先约定。优选地，N＝N-1。进入步骤2。
步骤5：检测defer period内信道是否空闲，如果评估信道空闲，则进入步骤4。如果检测信道忙，重复步骤5。defer period是由16us+n*slot组成，n为大于等于0的整数，优选地，n 为0，1，2，3等。slot时长为9us。
上述几种LBT机制中步骤和/或过程在不影响的情况下，可以进行更换前后执行顺序。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例的方法。
在本实施例中还提供了一种前导码发送、接收装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图11是根据本发明实施例的前导码发送装置的结构框图，如图11所示，该装置包括：第一确定模块112和第一发送模块114，下面对该装置进行说明。
第一确定模块112，设置为确定非授权载波上用于发送前导码的时域和/或频域资源；第一发送模块114，连接至上述第一确定模块112，设置为在确定的时域和/或频域资源上发送前导码。
图12是根据本发明实施例的前导码发送装置中第一发送模块114的优选结构框图一，如图12所示，该第一发送模块114包括：第一发送单元122，下面对该第一发送单元122进行说明。
第一发送单元122，设置为通过短控制信令SCS，在时域和/或频域资源上发送前导码。
图13是根据本发明实施例的前导码发送装置中第一确定模块112的优选结构框图，如图13所示，该第一确定模块112包括：第一确定单元132，下面对该第一确定模块112进行说明。
第一确定单元132，设置为执行以下操作至少之一：
依据预定义的方式，确定用于发送所述前导码的所述时域和/或频域资源；
依据物理层下行控制信息DCI信令，确定用于发送所述前导码的所述时域和/或频域资源；
依据高层无线资源控制RRC信令，确定用于发送所述前导码的所述时域和/或频域资源；
依据LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源。
图14是根据本发明实施例的前导码发送装置中第一确定模块112中第一确定单元132的优选结构框图，如图14所示，该第一确定单元132包括以下之一：第一确定子单元142，第二确定子单元144，第三确定子单元146，第四确定子单元148，下面对该第一确定单元132 进行说明。
第一确定子单元142，设置为在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第一预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；第二确定子单元144，设置为用于在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上继续执行LBT机制和/或CCA检测，在非授权载波上执行LBT和/或CCA检测成功的情况下，确定LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送前导码的时域和/或频域资源；第三确定子单元146，设置为在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波的第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行LBT机制和/或CCA检测，并在第二预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第二预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；第四确定子单元148，设置为在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上用于发送前导码的时间窗内执行LBT机制和/或CCA检测，并在时间窗内的第三预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第三预定时域和/或频域资源为用于发送前导码的时域和/或频域资源。
图15是根据本发明实施例的前导码发送装置中第一发送模块114的优选结构框图二，如图15所示，该第一发送模块114包括：第二确定单元152和第二发送单元154，下面对该第一发送模块114进行说明。
第二确定单元152，设置为根据确定的时域和/或频域资源，确定非授权载波上用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；第二发送单元154，连接至上述第二确定单元152，设置为在确定的时域和/或频域资源上发送前导码，和在确定的第四预定时域和/或频域资源上发送Msg3消息的部分或全部内容。
图16是根据本发明实施例的前导码接收装置的结构框图，如图16所示，该装置包括：第一接收模块162和第一处理模块164，下面对该装置进行说明。
第一接收模块162，设置为接收用户设备UE在非授权载波上的时域和/或频域资源上发送的前导码；第一处理模块164，连接至上述第一接收模块162，设置为依据接收的前导码执行对UE的随机接入处理。
图17是根据本发明实施例的前导码接收装置中第一接收模块162的优选结构框图，如图17所示，该第一接收模块162包括：第一接收单元172，下面对该第一接收单元172进行说明。
第一接收单元172，设置为接收UE通过短控制信令SCS，在非授权载波上的时域和/或频域资源上发送的前导码。
图18是根据本发明实施例的前导码接收装置中第一处理模块164的优选结构框图，如图 18所示，该第一处理模块164包括：第二接收单元182，下面对该第二接收单元182进行说明。
第二接收单元182，设置为在非授权载波上的第四预定时域和/或频域资源上接收Msg3消息的部分或全部内容，其中，第四预定时域和/或频域资源包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
图19是根据本发明实施例的前导码接收装置的优选结构框图，如图19所示，该装置除包括图16所示的所有结构外，还包括：第二发送模块192，下面对该第二发送模块192进行说明。
第二发送模块192，连接至上述第一接收模块162，设置为向UE发送用于确定时域和/或频域资源和/或第四时域和/或频域资源和/或前导码的指令。
图20是根据本发明实施例的随机接入装置一的结构框图，如图20所示，该装置包括：获取模块202和第二处理模块204，下面对该装置进行说明。
获取模块202，设置为获取非授权载波的使用权；第二处理模块204，连接至上述获取模块202，设置为依据获取到使用权的非授权载波进行随机接入处理。
图21是根据本发明实施例的随机接入装置一中第二处理模块204的优选结构框图，如图21所示，该第二处理模块204包括：第一处理单元212或者第二处理单元214，下面对该第二处理模块204进行说明。
第一处理单元212，设置为在非授权载波上向基站发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息的部分内容的部分Msg3消息；接收基站根据Msg_1消息发送的第一响应消息；根据第一响应消息向基站发送携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；接收基站依据剩余Msg3消息发送的Msg4消息；依据Msg4消息确定在非授权载波上进行随机接入是否成功；或者，
第二处理单元214，设置为在非授权载波上向基站发送Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息全部内容的Msg3消息；接收基站根据Msg_M消息发送的第二响应消息；依据第二响应消息确定在非授权载波上进行随机接入是否成功。
优选地，第一处理单元212，还设置为发送部分Msg3消息，发送部分Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰；或者，第二处理单元214，还设置为在发送Msg3消息之前，对发送Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
优选地，第一处理单元212，还设置为对用于发送剩余Msg3消息的传输信道和/或控制信道采用第一TC-RNTI或者第二TC-RNTI进行加扰。
图22是根据本发明实施例的随机接入装置二的结构框图，如图22所示，该装置包括：第二确定模块222和第三处理模块224，下面对该装置进行说明。
第二确定模块222，设置为确定用户设备UE竞争到的非授权载波；第三处理模块224，连接至上述第二确定模块222，设置为依据确定的非授权载波执行UE的随机接入处理。
图23是根据本发明实施例的随机接入装置二中第三处理模块224的优选结构框图，如图23所示，该第三处理模块224包括：第三处理单元232或者第四处理单元234，下面对该第三处理模块224进行说明。
第三处理单元232，设置为在非授权载波上接收UE发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息的部分内容的部分Msg3消息；基于Msg_1消息向UE发送第一响应消息；接收UE根据第一响应消息发送的携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；依据剩余Msg3消息向UE发送Msg4消息，其中，Msg4消息用于UE确定在非授权载波上进行随机接入是否成功；或者，
第四处理单元234，设置为在非授权载波上接收UE发送的Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息全部内容的Msg3消息；根据Msg_M消息向UE发送第二响应消息，其中，第二响应消息用于UE确定在非授权载波上进行随机接入是否成功。
优选地，该第三处理单元232，还设置为：在授权载波上向UE发送第一响应消息；或者，在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送第一响应消息。
优选地，该第三处理单元232，还设置为在接收到部分Msg3消息之后，对部分Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰；或者，该第四处理单元234，还设置为在接收到Msg3消息之后，对Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
优选地，该第三处理单元232，还设置为在第一响应消息携带有第二TC-RNTI，以及接收到剩余Msg3消息的情况下，对接收到的剩余Msg3消息采用第一TC-RNTI或者第二TC-RNTI进行解扰。
图24是根据本发明实施例的用户设备UE的结构框图，如图24所示，该UE 240包括上述任一项的前导码发送装置242，和/或上述任一项的随机接入装置一244。
图25是根据本发明实施例的基站的结构框图，如图25所示，该基站250包括上述任一项的前导码接收装置252，和/或上述任一项的随机接入装置二254。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，确定非授权载波上用于发送前导码的时域和/或频域资源；
S2，在确定的时域和/或频域资源上发送前导码。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在确定的时域和/或频域资源上发送前导码包括：通过短控制信令SCS，在时域和/或频域资源上发送前导码。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
确定非授权载波上用于发送前导码的时域和/或频域资源包括：
S1，在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测；
S2，依据执行LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
依据执行LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源包括以下之一：
S1，在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第一预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；
S2，在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上继续执行LBT机制和/或CCA检测，并在非授权载波上执行LBT和/或CCA检测成功的情况下，确定LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送前导码的时域和/或频域资源；
S3，在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波的第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行LBT机制和/或CCA检测，并在第二预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第二预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；
S4，在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上用于补充发送前导码的时间窗内执行LBT机制和/或CCA检测，并在时间窗内的第三预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第三预定时域和/或频域资源为用于发送前导码的时域和/或频域资源。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域包括以下之一：第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的特殊子帧；第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的上行子帧；第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的前导码子帧。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的上行导频时隙UpPTS的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：部分/全部UpPTS；部分/全部保护时隙GP和/或UpPTS；部分/全部DwPTS和/或GP和/或UpPTS；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS；部分/全部UpPTS和/或部分/全部CP时间；部分/全部GP和/或UpPTS和/或部分/全部CP时间；部分/全部DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的保护时隙GP的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：部分/全部GP时间；部分/全部GP和/或部分/全部CP时间；部分/全部下行导频时隙DwPTS和/或GP和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或部分/全部CP时间。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧，并且第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源的前一个子帧存在物理随机接入信道PRACH信道的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：前一个子帧的PRACH的部分/全部GT时间；前一个子帧的PRACH的部分/全部GT时间和/或第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源所在当前PRACH子帧的部分或全部CP时间；在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧，并且第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源的前一个子帧无PRACH信道的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：前一个子帧的最后k个正交频分复用OFDM符号内；前一个子帧的最后k个正交频分复用 OFDM符号和/或第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源所在当前PRACH子帧的部分/全部CP时间。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，第一预定时域和/或频域资源和/或第二预定时域资源和/或第三预定时域资源通过以下方式至少之一确定：由基站为用户设备UE分配的方式确定；由物理层信令通知的方式确定；由高层信令通知的方式确定；由基站与UE协商的方式确定；由系统为UE预先配置的方式确定。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在邻近时域和/或频域资源为多个的情况下，该多个邻近时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；在第二预定时域和/或频域资源为多个的情况下，该多个第二时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；在时间窗内包括多个第三时域和/或频域资源的情况下，该多个第三时域和/或频域资源为时域上连续的时域和/或频域资源，或者时域上离散的时域和/或频域资源。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，多个邻近时域和/或频域资源、或者，多个第二预定时域和/或频域资源、或者，多个第三时域和/或频域资源为在时域上离散的时域和/或频域资源包括以下之一：时域上等间隔且资源块大小不等的时域和/或频域资源；时域上等间隔且资源块大小相同的时域和/或频域资源；时域上不等间隔且资源块大小不等的时域和/或频域资源；时域上不等间隔且资源块大小相同的时域和/或频域资源。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，第一预定时域和/或频域资源在时域上为K个子帧，或者N个OFDM符号，其中，K，N为大于或等于1的整数。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，时间窗可以位于第一预定时域和/或频域资源之后、或者，位于第一预定时域和/或频域资源之前、或者，包含第一预定时域和/或频域资源
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，时间窗中的第三预定时域和/或频域资源通过以下参数确定：用于标识第一预定时域和/或频域资源与时间窗起点之间偏移距离的第一偏移量；用于标识时间窗内用于发送前导码的第三预定时域和/或频域资源与时间窗起点之间的偏移距离的第二偏移量；第三预定时域和/或频域资源的大小；第三预定时域和/或频域资源的数目；时间窗的窗长；第三预定时域和/或频域资源间的间隔。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
在确定的时域和/或频域资源上发送前导码包括：
S1，根据确定的时域和/或频域资源，确定非授权载波上用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；
S2，在确定的时域和/或频域资源上发送前导码，和在确定的第四预定时域和/或频域资源上发送Msg3消息的部分或全部内容。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，第四预定时域和/或频域资源包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
本发明的实施例还提供了另一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，接收用户设备UE在非授权载波上的时域和/或频域资源上发送的前导码；
S2，依据接收的前导码执行对UE的随机接入处理。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
接收UE在非授权载波上的时域和/或频域资源上发送的前导码包括：
S1，接收UE通过短控制信令SCS，在非授权载波上的时域和/或频域资源上发送的前导码。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
依据接收的前导码执行对UE的随机接入处理包括：
S1，在非授权载波上的第四预定时域和/或频域资源上接收Msg3消息的部分或全部内容，其中，第四预定时域和/或频域资源包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在接收UE在非授权载波上的时域和/或频域资源上发送的前导码之前，还包括：向UE发送用于确定时域和/或频域资源和/或第四时域和/或频域资源和/或前导码的指令。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，获取非授权载波的使用权；
S2，依据获取到使用权的非授权载波进行随机接入处理。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
依据获取到的非授权载波进行随机接入处理包括：
S1，在非授权载波上向基站发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息的部分内容的部分Msg3消息；接收基站根据Msg_1消息发送的第一响应消息；根据第一响应消息向基站发送携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；接收基站依据剩余Msg3消息发送的Msg4消息；依据Msg4消息确定在非授权载波上进行随机接入是否成功；或者，
S2，在非授权载波上向基站发送Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息全部内容的Msg3消息；接收基站根据Msg_M消息发送的第二响应消息；依据第二响应消息确定在非授权载波上进行随机接入是否成功。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，用于发送Msg1消息的时域和/或频域资源与用于发送部分Msg3消息的时域和/或频域资源相同或者不同；或者，
S2，用于发送Msg1消息的时域和/或频域资源与用于发送Msg3消息的时域和/或频域资源相同或者不同。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，Msg3消息的部分内容包括以下至少之一：用户设备标识UE ID，小区无线网络临时标识C-RNTI，无线资源控制RRC请求，SR，BSR。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，发送部分Msg3消息和/或Msg3消息，还包括：对用于发送部分Msg3消息和/或Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，TC-RNTI通过以下对应关系至少之一获取：TC-RNTI与前导码之间的对应关系，TC-RNTI与UE ID之间的对应关系，TC-RNTI与前导码和UE ID之间的对应关系；或者，
S2，TC-RNTI通过以下方式至少之一获取：通过基站与UE约定的方式获取，通过由基站通知或配置UE的方式获取，通过高层信令通知的方式获取，通过物理层信令通知的方式获取，通过媒体接入控制MAC层信令通知的方式获取。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，第一响应消息携带有以下信息至少之一：第二TC-RNTI，上行授权信息，前导码索引，C-RNTI。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，发送剩余Msg3消息，还包括：对用于发送剩余Msg3消息的传输信道和/或控制信道采用第一TC-RNTI或者第二TC-RNTI进行加扰。
本发明的实施例还提供了另一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，确定用户设备UE竞争到的非授权载波；
S2，依据确定的非授权载波执行UE的随机接入处理。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
依据确定的非授权载波执行UE的随机接入处理包括：
S1，在非授权载波上接收UE发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；基于Msg_1消息向UE发送第一响应消息；接收UE根据第一响应消息发送的携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；依据剩余Msg3消息向UE发送Msg4消息，其中，Msg4消息用于UE确定在非授权载波上进行随机接入是否成功；或者，
S2，在非授权载波上接收UE发送的Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；根据Msg_M消息向UE发送第二响应消息，其中，第二响应消息用于UE确定在非授权载波上进行随机接入是否成功。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
基于Msg_1消息向UE发送第一响应消息包括：
S1，在授权载波上向UE发送第一响应消息；或者，
S2，在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送第一响应消息。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在接收到部分Msg3消息和/或Msg3消息之后，还包括：对部分Msg3消息和/或Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在第一响应消息携带有第二TC-RNTI，以及接收到剩余Msg3消息的情况下，对接收到的剩余Msg3消息采用第一TC-RNTI或者第二TC-RNTI进行解扰。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM， Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：确定非授权载波上用于发送前导码的时域和/或频域资源；在确定的时域和/或频域资源上发送前导码。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在确定的时域和/或频域资源上发送前导码包括：通过短控制信令SCS，在时域和/或频域资源上发送前导码。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：确定非授权载波上用于发送前导码的时域和/或频域资源包括：在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测；依据执行LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：依据执行LBT机制和/或CCA检测的执行结果，确定非授权载波上用于发送前导码的时域和/或频域资源包括以下之一：在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第一预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上继续执行LBT机制和/或CCA检测，并在非授权载波上执行LBT和/或CCA检测成功的情况下，确定LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送前导码的时域和/或频域资源；在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波的第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行LBT机制和/或CCA检测，并在第二预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第二预定时域和/或频域资源为用于发送前导码的时域和/或频域资源；在执行结果为在非授权载波上的第一预定时域和/或频域资源前执行LBT机制和/或CCA检测失败的情况下，在非授权载波上用于补充发送前导码的时间窗内执行LBT机制和/或CCA检测，并在时间窗内的第三预定时域和/或频域资源前执行LBT机制和/或CCA检测成功的情况下，确定第三预定时域和/或频域资源为用于发送前导码的时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域包括以下之一：第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的特殊子帧；第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的上行子帧；第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的前导码子帧。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：在第 一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的上行导频时隙UpPTS的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：部分/全部UpPTS；部分/全部保护时隙GP和/或UpPTS；部分/全部DwPTS和/或GP和/或UpPTS；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS；部分/全部UpPTS和/或部分/全部CP时间；部分/全部GP和/或UpPTS和/或部分/全部CP时间；部分/全部DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为特殊子帧的保护时隙GP的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：部分/全部GP时间；部分/全部GP和/或部分/全部CP时间；部分/全部下行导频时隙DwPTS和/或GP和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或部分/全部CP时间。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧，并且第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源的前一个子帧存在物理随机接入信道PRACH信道的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：前一个子帧的PRACH的部分/全部GT时间；前一个子帧的PRACH的部分/全部GT时间和/或第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源所在当前PRACH子帧的部分或全部CP时间；在第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源前的区域为上行子帧，并且第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源的前一个子帧无PRACH信道的情况下，用于执行LBT机制和/或CCA检测的区域包括以下至少之一：前一个子帧的最后k个正交频分复用OFDM符号内；前一个子帧的最后k个正交频分复用OFDM符号和/或第一预定时域和/或频域资源或者第二预定时域和/或频域资源前或者第三预定时域和/或频域资源所在当前PRACH子帧的部分/全部CP时间。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第一预定时域和/或频域资源和/或第二预定时域资源和/或第三预定时域资源通过以下方式至少之一确定：由基站为用户设备UE分配的方式确定；由物理层信令通知的方式确定；由高层信令通知的方式确定；由基站与UE协商的方式确定；由系统为UE预先配置的方式确定。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在邻近时域和/或频域资源为多个的情况下，该多个邻近时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；在第二预定时域和/或频域资源为多个的情况下，该多个第二时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；在时间窗内包括多个第三时域和/或频域资源的情况下，该多个第三时 域和/或频域资源为时域上连续的时域和/或频域资源，或者时域上离散的时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：多个邻近时域和/或频域资源、或者，多个第二预定时域和/或频域资源、或者，多个第三时域和/或频域资源为在时域上离散的时域和/或频域资源包括以下之一：时域上等间隔且资源块大小不等的时域和/或频域资源；时域上等间隔且资源块大小相同的时域和/或频域资源；时域上不等间隔且资源块大小不等的时域和/或频域资源；时域上不等间隔且资源块大小相同的时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第一预定时域和/或频域资源在时域上为K个子帧，或者N个OFDM符号，其中，K，N为大于或等于1的整数。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：时间窗可以位于第一预定时域和/或频域资源之后、或者，位于第一预定时域和/或频域资源之前、或者，包含第一预定时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：时间窗中的第三预定时域和/或频域资源通过以下参数确定：用于标识第一预定时域和/或频域资源与时间窗起点之间偏移距离的第一偏移量；用于标识时间窗内用于发送前导码的第三预定时域和/或频域资源与时间窗起点之间的偏移距离的第二偏移量；第三预定时域和/或频域资源的大小；第三预定时域和/或频域资源的数目；时间窗的窗长；第三预定时域和/或频域资源间的间隔。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在确定的时域和/或频域资源上发送前导码包括：根据确定的时域和/或频域资源，确定非授权载波上用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；在确定的时域和/或频域资源上发送前导码，和在确定的第四预定时域和/或频域资源上发送Msg3消息的部分或全部内容。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第四预定时域和/或频域资源包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：接收用户设备UE在非授权载波上的时域和/或频域资源上发送的前导码；依据接收的前导码执行对UE的随机接入处理。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：接收UE在非授权载波上的时域和/或频域资源上发送的前导码包括：接收UE通过短控制信令SCS，在非授权载波上的时域和/或频域资源上发送的前导码。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：依据接收的前导码执行对UE的随机接入处理包括：在非授权载波上的第四预定时域和/或频域资源上接收 Msg3消息的部分或全部内容，其中，第四预定时域和/或频域资源包括以下至少之一：与时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在接收UE在非授权载波上的时域和/或频域资源上发送的前导码之前，还包括：向UE发送用于确定时域和/或频域资源和/或第四时域和/或频域资源和/或前导码的指令。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：获取非授权载波的使用权；依据获取到使用权的非授权载波进行随机接入处理。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：依据获取到的非授权载波进行随机接入处理包括：在非授权载波上向基站发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；接收基站根据Msg_1消息发送的第一响应消息；根据第一响应消息向基站发送携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；接收基站依据剩余Msg3消息发送的Msg4消息；依据Msg4消息确定在非授权载波上进行随机接入是否成功；或者，在非授权载波上向基站发送Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；接收基站根据Msg_M消息发送的第二响应消息；依据第二响应消息确定在非授权载波上进行随机接入是否成功。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：用于发送Msg1消息的时域和/或频域资源与用于发送部分Msg3消息的时域和/或频域资源相同或者不同；或者，用于发送Msg1消息的时域和/或频域资源与用于发送Msg3消息的时域和/或频域资源相同或者不同。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：Msg3消息的部分内容包括以下至少之一：用户设备标识UE ID，小区无线网络临时标识C-RNTI，无线资源控制RRC请求，SR，BSR。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：发送部分Msg3消息和/或Msg3消息，还包括：对用于发送部分Msg3消息和/或Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：TC-RNTI通过以下对应关系至少之一获取：TC-RNTI与前导码之间的对应关系，TC-RNTI与UE ID之间的对应关系，TC-RNTI与前导码和UE ID之间的对应关系；或者，TC-RNTI通过以下方式至少之一获取：通过基站与UE约定的方式获取，通过由基站通知或配置UE的方式获取，通过高层信令通知的方式获取，通过物理层信令通知的方式获取，通过媒体接入控制MAC层信令通知的方式获取。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第一响应消息 携带有以下信息至少之一：第二TC-RNTI，上行授权信息，前导码索引，C-RNTI。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：发送剩余Msg3消息，还包括：对用于发送剩余Msg3消息的传输信道和/或控制信道采用第一TC-RNTI或者第二TC-RNTI进行加扰。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：确定用户设备UE竞争到的非授权载波；依据确定的非授权载波执行UE的随机接入处理。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：依据确定的非授权载波执行UE的随机接入处理包括：在非授权载波上接收UE发送Msg_1消息，其中，Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息的部分内容的部分Msg3消息；基于Msg_1消息向UE发送第一响应消息；接收UE根据第一响应消息发送的携带有Msg3消息的除部分内容之外的剩余内容的剩余Msg3消息；依据剩余Msg3消息向UE发送Msg4消息，其中，Msg4消息用于UE确定在非授权载波上进行随机接入是否成功；或者，在非授权载波上接收UE发送的Msg_M消息，其中，Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和携带有Msg3消息全部内容的Msg3消息；根据Msg_M消息向UE发送第二响应消息，其中，第二响应消息用于UE确定在非授权载波上进行随机接入是否成功。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：基于Msg_1消息向UE发送第一响应消息包括：在授权载波上向UE发送第一响应消息；或者，在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送第一响应消息。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在接收到部分Msg3消息和/或Msg3消息之后，还包括：对部分Msg3消息和/或Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在第一响应消息携带有第二TC-RNTI，以及接收到剩余Msg3消息的情况下，对接收到的剩余Msg3消息采用第一TC-RNTI或者第二TC-RNTI进行解扰。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种前导码发送、接收方法、装置、用户设备及基站具有以下有益效果：解决了相关技术中无法实现在非授权载波上进行随机接入过程的问题，进而达到了能够成功在非授权载波上进行随机接入的效果。

Claims (52)

  1. 一种前导码发送方法，包括：
    确定用于发送前导码的时域和/或频域资源；
    在确定的所述时域和/或频域资源上发送所述前导码。
  2. 根据权利要求1所述的方法，其中，在确定的所述时域和/或频域资源上发送所述前导码包括：
    通过短控制信令SCS，在所述时域和/或频域资源上发送所述前导码。
  3. 根据权利要求1所述的方法，其中，确定用于发送所述前导码的所述时域和/或频域资源包括以下至少之一：
    依据预定义的方式，确定用于发送所述前导码的所述时域和/或频域资源；
    依据物理层下行控制信息DCI信令，确定用于发送所述前导码的所述时域和/或频域资源；
    依据高层无线资源控制RRC信令，确定用于发送所述前导码的所述时域和/或频域资源；
    依据先听后说LBT机制和/或空闲信道评估CCA检测的执行结果，确定用于发送所述前导码的所述时域和/或频域资源。
  4. 根据权利要求3所述的方法，其中，依据执行所述LBT机制和/或所述CCA检测的所述执行结果，确定用于发送所述前导码的所述时域和/或频域资源包括以下之一：
    在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第一预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；
    在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，继续执行所述LBT机制和/或CCA检测，在执行所述LBT和/或CCA检测成功的情况下，确定所述LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；
    在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在所述第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测，并在所述第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第二预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；
    在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在用于发送所述前导码的时间窗内执行所述LBT机制和/或 所述CCA检测，并在所述时间窗内的第三预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第三预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源。
  5. 根据权利要求4所述的方法，其中，所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域包括以下之一：
    所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的特殊子帧；
    所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的上行子帧；
    所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的前导码子帧。
  6. 根据权利要求5所述的方法，其中，在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述特殊子帧的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：
    在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述特殊子帧的上行导频时隙UpPTS的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：部分/全部UpPTS；部分/全部保护时隙GP和/或UpPTS；部分/全部DwPTS和/或GP和/或UpPTS；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS；部分/全部UpPTS和/或部分/全部CP时间；部分/全部GP和/或UpPTS和/或部分/全部CP时间；部分/全部DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或UpPTS和/或部分/全部CP时间；
    在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述特殊子帧的保护时隙GP的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：部分/全部GP时间；部分/全部GP和/或部分/全部CP时间；部分/全部下行导频时隙DwPTS和/或GP和/或部分/全部CP时间；下行子帧中最后k个符号和/或DwPTS和/或GP和/或部分/全部CP时间。
  7. 根据权利要求5所述的方法，其中，在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为所述上行子帧的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：
    在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为上行子帧，并且所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源的前一 个子帧存在物理随机接入信道PRACH信道的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：所述前一个子帧的PRACH的部分/全部GT时间；所述前一个子帧的PRACH的部分/全部GT时间和/或所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源所在当前PRACH子帧的部分或全部CP时间；
    在所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源前的区域为上行子帧，并且所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源的前一个子帧无PRACH信道的情况下，用于执行所述LBT机制和/或所述CCA检测的区域包括以下至少之一：所述前一个子帧的最后k个正交频分复用OFDM符号内；所述前一个子帧的最后k个正交频分复用OFDM符号和/或所述第一预定时域和/或频域资源或者所述第二预定时域和/或频域资源前或者所述第三预定时域和/或频域资源所在当前PRACH子帧的部分/全部CP时间。
  8. 根据权利要求4至7中任一项所述的方法，其中，所述第一预定时域和/或频域资源、所述第二预定时域和/或频域资源、所述第三预定时域和/或频域资源、LBT/CCA或CP或GT或PRACH资源的起始位置或时长或结束位置，中的至少之一通过以下方式至少之一确定：
    由基站为用户设备UE分配的方式确定；
    由物理层信令通知的方式确定；
    由高层信令通知的方式确定；
    由基站与所述UE协商的方式确定；
    由系统为所述UE预先配置的方式确定。
  9. 根据权利要求4至7中任一项所述的方法，其中，
    在所述邻近时域和/或频域资源为多个的情况下，该多个邻近时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；和/或，
    在所述第二预定时域和/或频域资源为多个的情况下，该多个第二时域和/或频域资源为在时域上连续的时域和/或频域资源，或者在时域上离散的时域和/或频域资源；和/或，
    在所述时间窗内包括多个第三时域和/或频域资源的情况下，该多个第三时域和/或频域资源为时域上连续的时域和/或频域资源，或者时域上离散的时域和/或频域资源。
  10. 根据权利要求9所述的方法，其中，所述多个邻近时域和/或频域资源、或者，所述多个第二预定时域和/或频域资源、或者，所述多个第三时域和/或频域资源为在时域上离散的时域和/或频域资源包括以下之一：
    时域上等间隔且资源块大小不等的时域和/或频域资源；时域上等间隔且资源块大小相同的时域和/或频域资源；时域上不等间隔且资源块大小不等的时域和/或频域资源；时域上不等间隔且资源块大小相同的时域和/或频域资源。
  11. 根据权利要求4所述的方法，其中，所述第一预定时域和/或频域资源在时域上为K个子帧，或者N个OFDM符号，其中，K，N为大于或等于1的整数。
  12. 根据权利要求4所述的方法，其中，所述时间窗可以位于所述第一预定时域和/或频域资源之后、或者，位于所述第一预定时域和/或频域资源之前、或者，包含所述第一预定时域和/或频域资源。
  13. 根据权利要求12所述的方法，其中，所述时间窗中的所述第三预定时域和/或频域资源通过以下参数确定：
    用于标识所述第一预定时域和/或频域资源与所述时间窗起点之间偏移距离的第一偏移量；
    用于标识所述时间窗内用于发送所述前导码的第三预定时域和/或频域资源与所述时间窗起点之间的偏移距离的第二偏移量；
    所述第三预定时域和/或频域资源的大小；
    所述第三预定时域和/或频域资源的数目；
    所述时间窗的窗长；
    所述第三预定时域和/或频域资源间的间隔。
  14. 根据权利要求1所述的方法，其中，在确定的所述时域和/或频域资源上发送所述前导码包括：
    根据确定的所述时域和/或频域资源，确定用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；
    在确定的所述时域和/或频域资源上发送所述前导码，和在确定的所述第四预定时域和/或频域资源上发送所述Msg3消息的部分或全部内容。
  15. 根据权利要求14所述的方法，其中，所述第四预定时域和/或频域资源包括以下至少之一：
    与所述时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；
    与所述时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
  16. 一种前导码接收方法，包括：
    接收用户设备UE在时域和/或频域资源上发送的前导码；
    依据接收的所述前导码执行对所述UE的随机接入处理。
  17. 根据权利要求16所述的方法，其中，接收所述UE在所述时域和/或频域资源上发送的所述前导码包括：
    接收所述UE通过短控制信令SCS，在所述时域和/或频域资源上发送的所述前导码。
  18. 根据权利要求16所述的方法，其中，依据接收的所述前导码执行对所述UE的随机接入处理包括：
    在第四预定时域和/或频域资源上接收所述Msg3消息的部分或全部内容，其中，所述第四预定时域和/或频域资源包括以下至少之一：与所述时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与所述时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
  19. 根据权利要求18所述的方法，其中，在接收所述UE在所述时域和/或频域资源上发送的所述前导码之前，还包括：
    向所述UE发送用于确定所述时域和/或频域资源和/或所述第四时域和/或频域资源和/或所述前导码的指令。
  20. 一种随机接入方法，包括：
    获取载波的使用权；
    依据获取到使用权的载波进行随机接入处理。
  21. 根据权利要求20所述的方法，其中，依据获取到的所述载波进行随机接入处理包括：
    在所述载波上向基站发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；接收所述基站根据所述Msg_1消息发送的第一响应消息；根据所述第一响应消息向所述基站发送携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；接收所述基站依据所述剩余Msg3消息发送的Msg4消息；依据所述Msg4消息确定在所述载波上进行随机接入是否成功；或者，
    在所述载波上向基站发送Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；接收所述基站根据所述Msg_M消息发送的第二响应消息；依据所述第二响应消息确定在所述载波上进行随机接入是否成功。
  22. 根据权利要求21所述的方法，其中，
    用于发送所述Msg1消息的时域和/或频域资源与用于发送所述部分Msg3消息的时域 和/或频域资源相同或者不同；或者，
    用于发送所述Msg1消息的时域和/或频域资源与用于发送所述Msg3消息的时域和/或频域资源相同或者不同。
  23. 根据权利要求21所述的方法，其中，所述Msg3消息的部分内容包括以下至少之一：
    用户设备标识UE ID，小区无线网络临时标识C-RNTI，无线资源控制RRC请求，调度请求SR，缓冲区状态报告BSR。
  24. 根据权利要求21所述的方法，其中，发送所述部分Msg3消息和/或所述Msg3消息，还包括：对用于发送所述部分Msg3消息和/或所述Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
  25. 根据权利要求24所述的方法，其中，
    所述TC-RNTI通过以下对应关系至少之一获取：TC-RNTI与前导码之间的对应关系，TC-RNTI与UE ID之间的对应关系，TC-RNTI与前导码和UE ID之间的对应关系；或者，所述TC-RNTI通过以下方式至少之一获取：通过基站与UE约定的方式获取，通过由基站通知或配置UE的方式获取，通过高层信令通知的方式获取，通过物理层信令通知的方式获取，通过媒体接入控制MAC层信令通知的方式获取。
  26. 根据权利要求21所述的方法，其中，所述第一响应消息携带有以下信息至少之一：
    第二TC-RNTI，上行授权信息，前导码索引，C-RNTI，时间提前量TA。
  27. 根据权利要求26所述的方法，其中，发送所述剩余Msg3消息，还包括：对用于发送所述剩余Msg3消息的传输信道和/或控制信道采用所述第一TC-RNTI或者所述第二TC-RNTI进行加扰。
  28. 一种随机接入方法，包括：
    确定用户设备UE竞争到的非授权载波；
    依据确定的所述非授权载波执行UE的随机接入处理。
  29. 根据权利要求28所述的方法，其中，依据确定的所述非授权载波执行UE的随机接入处理包括：
    在所述非授权载波上接收所述UE发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；基于所述Msg_1消息向所述UE发送第一响应消息；接收所述UE根据所述第一响应消息发送的携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；依据所述剩余Msg3消息向所述UE发送Msg4消息，其中，所述Msg4消息用于所述UE确定在所述非授权载波上进行随机接入是否成功；或者，
    在所述非授权载波上接收所述UE发送的Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；根据所述Msg_M消息向所述UE发送第二响应消息，其中，所述第二响应消息用于所述UE确定在所述非授权载波上进行随机接入是否成功。
  30. 根据权利要求29所述的方法，其中，基于所述Msg_1消息向所述UE发送所述第一响应消息包括：
    在授权载波上向所述UE发送所述第一响应消息；或者，
    在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行所述LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送所述第一响应消息。
  31. 根据权利要求29所述的方法，其中，在接收到所述部分Msg3消息和/或所述Msg3消息之后，还包括：对所述部分Msg3消息和/或所述Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
  32. 根据权利要求31所述的方法，其中，在所述第一响应消息携带有第二TC-RNTI，以及接收到所述剩余Msg3消息的情况下，对接收到的所述剩余Msg3消息采用所述第一TC-RNTI或者所述第二TC-RNTI进行解扰。
  33. 一种前导码发送装置，包括：
    第一确定模块，设置为确定用于发送前导码的时域和/或频域资源；
    第一发送模块，设置为在确定的所述时域和/或频域资源上发送所述前导码。
  34. 根据权利要求33所述的装置，其中，所述第一发送模块包括：
    第一发送单元，设置为通过短控制信令SCS，在所述时域和/或频域资源上发送所述前导码。
  35. 根据权利要求33所述的装置，其中，所述第一确定模块包括第一确定单元，所述第一确定单元设置为执行以下操作至少之一：
    依据预定义的方式，确定用于发送所述前导码的所述时域和/或频域资源；
    依据物理层下行控制信息DCI信令，确定用于发送所述前导码的所述时域和/或频域资源；
    依据高层无线资源控制RRC信令，确定用于发送所述前导码的所述时域和/或频域资源；
    依据先听后说LBT机制和/或空闲信道评估CCA检测的执行结果，确定用于发送所述前导码的所述时域和/或频域资源。
  36. 根据权利要求35所述的装置，其中，在依据所述LBT机制和/或所述CCA检测的执行结果，确定用于发送所述前导码的所述时域和/或频域资源时，所述第一确定单元包括以下之一：
    第一确定子单元，设置为在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第一预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；
    第二确定子单元，设置为在所述执行结果为在第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，继续执行所述LBT机制和/或CCA检测，在执行所述LBT和/或CCA检测成功的情况下，确定所述LBT和/或CCA检测成功时刻之后的邻近时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；
    第三确定子单元，设置为在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在所述第一预定时域和/或频域资源之后的第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测，并在所述第二预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第二预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源；
    第四确定子单元，设置为在所述执行结果为在所述第一预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测失败的情况下，在用于发送所述前导码的时间窗内执行所述LBT机制和/或所述CCA检测，并在所述时间窗内的第三预定时域和/或频域资源前执行所述LBT机制和/或所述CCA检测成功的情况下，确定所述第三预定时域和/或频域资源为用于发送所述前导码的所述时域和/或频域资源。
  37. 根据权利要求33所述的装置，其中，所述第一发送模块包括：
    第二确定单元，设置为根据确定的所述时域和/或频域资源，确定用于发送Msg3消息的部分或全部内容的第四预定时域和/或频域资源；
    第二发送单元，设置为在确定的所述时域和/或频域资源上发送所述前导码，和在确定的所述第四预定时域和/或频域资源上发送所述Msg3消息的部分或全部内容。
  38. 一种前导码接收装置，包括：
    第一接收模块，设置为接收用户设备UE在时域和/或频域资源上发送的前导码；
    第一处理模块，设置为依据接收的所述前导码执行对所述UE的随机接入处理。
  39. 根据权利要求38所述的装置，其中，所述第一接收模块包括：
    第一接收单元，设置为接收所述UE通过短控制信令SCS，在所述时域和/或频域资源上发送的所述前导码。
  40. 根据权利要求38所述的装置，其中，所述第一处理模块包括：
    第二接收单元，设置为在第四预定时域和/或频域资源上接收所述Msg3消息的部分或全部内容，其中，所述第四预定时域和/或频域资源包括以下至少之一：与所述时域和/或频域资源在时域上相同，在频域上偏移第三偏移量的时域和/或频域资源；与所述时域和/或频域资源在时域上偏移第四偏移量，在频域上相同的时域和/或频域资源。
  41. 根据权利要求40所述的装置，其中，还包括：
    第二发送模块，设置为向所述UE发送用于确定所述时域和/或频域资源和/或所述第四时域和/或频域资源和/或所述前导码的指令。
  42. 一种随机接入装置，包括：
    获取模块，设置为获取载波的使用权；
    第二处理模块，设置为依据获取到使用权的载波进行随机接入处理。
  43. 根据权利要求42所述的装置，其中，所述第二处理模块包括：
    第一处理单元，设置为在所述载波上向基站发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；接收所述基站根据所述Msg_1消息发送的第一响应消息；根据所述第一响应消息向所述基站发送携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；接收所述基站依据所述剩余Msg3消息发送的Msg4消息；依据所述Msg4消息确定在所述载波上进行随机接入是否成功；或者，
    第二处理单元，设置为在所述载波上向基站发送Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；接收所述基站根据所述Msg_M消息发送的第二响应消息；依据所述第二响应消息确定在所述载波上进行随机接入是否成功。
  44. 根据权利要求43所述的装置，其中，所述第一处理单元，还设置为对发送所述部分Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰；或者，所述第二处理单元，还设置为在发送所述Msg3消息之前，对发送所述Msg3消息的传输信道和/或控制信道采用第一临时小区无线网络临时标识TC-RNTI进行加扰。
  45. 根据权利要求43所述的装置，其中，所述第一处理单元，还设置为对用于发送所述剩余Msg3消息的传输信道和/或控制信道采用所述第一TC-RNTI或者所述第二TC-RNTI进行加扰。
  46. 一种随机接入装置，包括：
    第二确定模块，设置为确定用户设备UE竞争到的非授权载波；
    第三处理模块，设置为依据确定的所述非授权载波执行UE的随机接入处理。
  47. 根据权利要求46所述的装置，其中，所述第三处理模块包括：
    第三处理单元，设置为在所述非授权载波上接收所述UE发送Msg_1消息，其中，所述Msg_1消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息的部分内容的部分Msg3消息；基于所述Msg_1消息向所述UE发送第一响应消息；接收所述UE根据所述第一响应消息发送的携带有所述Msg3消息的除所述部分内容之外的剩余内容的剩余Msg3消息；依据所述剩余Msg3消息向所述UE发送Msg4消息，其中，所述Msg4消息用于所述UE确定在所述非授权载波上进行随机接入是否成功；或者，
    第四处理单元，设置为在所述非授权载波上接收所述UE发送的Msg_M消息，其中，所述Msg_M消息包括携带有进行随机接入的前导码的Msg1消息和/或携带有Msg3消息全部内容的Msg3消息；根据所述Msg_M消息向所述UE发送第二响应消息，其中，所述第二响应消息用于所述UE确定在所述非授权载波上进行随机接入是否成功。
  48. 根据权利要求47所述的装置，其中，所述第三处理单元，还设置为：
    在授权载波上向所述UE发送所述第一响应消息；或者，
    在非授权载波上执行先听后说LBT机制和/或空闲信道评估CCA检测，并在执行所述LBT机制和/或CCA检测成功后竞争到的时域和/或频域资源上发送所述第一响应消息。
  49. 根据权利要求47所述的装置，其中，
    所述第三处理单元，还设置为在接收到所述部分Msg3消息之后，对所述部分Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰；或者，
    所述第四处理单元，还设置为在接收到所述Msg3消息之后，对所述Msg3消息采用第一临时小区无线网络临时标识TC-RNTI进行解扰。
  50. 根据权利要求47所述的装置，其中，所述第三处理单元，还设置为在所述第一响应消息携带有第二TC-RNTI，以及接收到所述剩余Msg3消息的情况下，对接收到的所述剩余Msg3消息采用所述第一TC-RNTI或者所述第二TC-RNTI进行解扰。
  51. 一种用户设备UE，包括权利要求33至37任一项所述的装置，和/或权利要求42至45中任一项所述的装置。
  52. 一种基站，包括权利要求38至41任一项所述的装置，和/或权利要求46至50中任一项所述的装置。
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