WO2016206497A1 - 一种随机接入的方法、设备和系统 - Google Patents

一种随机接入的方法、设备和系统 Download PDF

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Publication number
WO2016206497A1
WO2016206497A1 PCT/CN2016/082087 CN2016082087W WO2016206497A1 WO 2016206497 A1 WO2016206497 A1 WO 2016206497A1 CN 2016082087 W CN2016082087 W CN 2016082087W WO 2016206497 A1 WO2016206497 A1 WO 2016206497A1
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group
message
enb
preamble
rnti
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PCT/CN2016/082087
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English (en)
French (fr)
Inventor
张雯
夏树强
戴博
戴谦
鲁照华
刘锟
陈宪明
石靖
李新彩
方惠英
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中兴通讯股份有限公司
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=57584447&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2016206497(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US15/738,233 priority Critical patent/US10448430B2/en
Priority to EP16813613.3A priority patent/EP3316651B1/en
Publication of WO2016206497A1 publication Critical patent/WO2016206497A1/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
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • 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
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/186—Processing of subscriber group data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present application relates to, but is not limited to, the field of communications, and in particular, to a method, device and system for random access.
  • Machine Type Communication (MTC) User Terminal User Equipment or Terminal
  • M2M Machine to Machine
  • LTE/LTE-A Long-Term Evolution/Long-Term Evolution Advance
  • MTC multi-class data services based on LTE/LTE-A will also be more attractive.
  • Random access is a basic function. After the UE synchronizes with the uplink of the system through the random access procedure, it can be scheduled by the system for uplink transmission. Random access in LTE is divided into two types: contention-based random access and contention-free random access.
  • the initial random access procedure is a contention-based access procedure that can be divided into four steps.
  • the UE sends a preamble (preamble), and the UE randomly selects an available preamble for transmission.
  • An eNB (Evolved Node B, also referred to as an evolved base station) transmits a random access response (RAR).
  • RAR random access response
  • the eNB detects the preamble sequence sent by the UE, it sends a response on the downlink synchronization channel (DL-SCH, DownLink-Synchronization Channel), including: the index number of the detected preamble sequence, and the time adjustment information used for uplink synchronization. , initial uplink resource allocation (for transmitting subsequent message 3), and a Temporary Cell Radio Network Tempory Identity (TC-RNTI), this TC-RNTI will be in step (4) (collision resolution) ) decide whether to turn Switch to permanent C-RNTI.
  • the UE needs to use a random access radio network temporary identification random access RNTI (RA-RNTI) to listen to the RAR message on the Physical Downlink Control Channel (PDCCH).
  • RA-RNTI random access radio network temporary identification random access RNTI
  • RA-RNTI 1+t_id+10*f_id
  • FDD Frequency Division Duplexing
  • the UE sends a message 3.
  • 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. Since the preamble sequence of the UE is randomly selected from the common resources, there is a possibility that different UEs transmit the same access preamble sequence on the same time-frequency resource, so that they will pass the same RA- The RNTI receives the same RAR. 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 Message 3 and Message 4 messages.
  • the eNB sends a message 4, that is, a conflict resolution message. If the UE receives the message 4 returned by the eNB in the time of the media access control-collision resolution timer (mac-ContentionResolutionTimer), and the UE identifier (ID) carried in the message is consistent with the eNB reported in the message 3, then The UE considers that it has won the random access collision and the random access is successful.
  • the temporary C-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.
  • random access concurrent transmission blocking rate ⁇ 0.1%
  • the access density per square meter in 1s ⁇ 10s is not less than 10 UE.
  • at least tens of thousands of users are connected within 1s to 10s.
  • the random access method in the related art even when the UE is uniformly accessed, and each subframe can initiate random access, At least a hundred times more physical random access channel resources are required.
  • the UE is not evenly connected, so the number of resources required may be more.
  • M megabit
  • This paper provides a random access method, device and system to save PRACH resources and meet the needs of massive machine communication.
  • An embodiment of the present invention provides a method for random access, where the method includes:
  • the first UE in the user equipment UE group sends a preamble preamble to the evolved base station eNB on a time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource;
  • the first UE and/or the second UE in the UE group listen to the random access response RAR corresponding to the preamble sent by the eNB, where the first UE is at least one of the UE groups.
  • the second UE is all or part of the UE in the UE group.
  • the first UE is at least one of the following:
  • At least one UE determined according to a preset rule At least one UE determined according to a preset rule
  • At least one UE notified by the eNB At least one UE notified by the eNB.
  • the preamble and/or the time domain resource and/or the frequency domain resource are preset, or are determined by a group identifier of the UE group, or are notified by the eNB.
  • the first UE and/or the second UE listening to the RAR corresponding to the preamble sent by the eNB includes:
  • the RAR includes at least one temporary cell wireless network Temporarily identifying the TC-RNTI and/or at least one upstream grant;
  • the first UE and/or the second UE determines a TC-RNTI and/or an uplink grant allocated to itself according to at least one TC-RNTI and/or at least one uplink grant included in the RAR.
  • the first UE and/or the second UE determines, according to the at least one TC-RNTI and/or the at least one uplink grant included in the RAR, that the TC-RNTI and/or the uplink grant allocated to the first UE include:
  • the first UE and/or the second UE determine the TC-RNTI and/or the uplink grant allocated to itself according to the preset rule according to the preset rule.
  • the first UE and/or the second UE listening to the RAR corresponding to the preamble sent by the eNB includes:
  • the respective corresponding RA-RNTIs Determining, by the first UE and/or the second UE, the respective corresponding RA-RNTIs according to the respective identifiers and/or preambles, and descrambling the CRCs of the DCIs that schedule the RARs according to the respective corresponding RA-RNTIs, And receiving the corresponding RAR, where the RAR includes a TC-RNTI and/or an uplink grant allocated to the corresponding first UE or the second UE.
  • the method further includes:
  • the first UE and/or the second UE sends a message 3 according to an uplink grant assigned to itself.
  • the method further includes:
  • the first UE and/or the second UE receives the message 4 sent by the eNB.
  • the receiving, by the first UE and/or the second UE, the message 4 sent by the eNB includes:
  • the CRC scheduling the DCI of the message 4 is scrambled with the TC-RNTI allocated to the first UE and/or the second UE.
  • the message 4 includes at least one set of radio resources, and the radio resources allocated by the first UE and/or the second UE to the UE are determined by the UE according to the at least one radio resource included in the message 4. .
  • the radio resource allocated by the first UE and/or the second UE to itself is further used by the UE According to its own identification, it is determined according to preset rules.
  • the message 4 includes:
  • a set of radio resources allocated to the corresponding first UE or the second UE is allocated to the corresponding first UE or the second UE.
  • the method further includes:
  • the indication signal is a scheduling request SR or an acknowledgement ACK signal.
  • the method further includes:
  • the first UE and/or the second UE receives indication information that is sent by the eNB to instruct the first UE and/or the second UE to re-initiate random access.
  • the method before the first UE in the UE group sends a preamble on a time-frequency resource, the method further includes:
  • the first UE receives random access request information sent by the second UE.
  • the first UE and/or the second UE receiving the DCI or the paging message or the RRC message sent by the eNB includes at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the method further includes:
  • the first UE counts a random access request of the second UE in the received group
  • the first UE When the count reaches a preset threshold, the first UE sends a preamble on a time-frequency resource.
  • the sending, by the first UE in the UE group, a preamble on a time-frequency resource includes:
  • the first UE periodically transmits a preamble on one frequency domain resource.
  • the message 3 and the message 4 include a group identifier of the UE group or a preset field.
  • the message 3 includes the number of UEs with a random access request in the UE group or the number of UEs included in the UE group or a preset number of UEs.
  • the embodiment of the invention further provides a method for random access, the method comprising:
  • the evolved base station eNB receives the preamble preamble that is sent by the first UE in the user equipment UE group on one time-frequency resource, where the time-frequency resource includes the time domain resource and the frequency domain resource, and the first UE is the UE group. At least one UE;
  • the eNB sends a random access response RAR corresponding to the preamble.
  • the RAR includes at least one temporary cell radio network temporary identifier TC-RNTI and/or at least one uplink grant; and the RAR is used by the first UE and/or the second UE according to the identifier of the first UE.
  • the allocation rule determines a TC-RNTI and/or an uplink grant assigned to itself from the at least one TC-RNTI and/or an uplink grant, the second UE being all or part of the UEs in the UE group.
  • the RAR includes one TC-RNTI and/or one uplink grant allocated to the corresponding first UE and/or the second UE, where the second UE is all or part of the UE group. UE.
  • the method further includes:
  • the eNB receives a message 3 sent by the first UE and/or the second UE according to an uplink grant assigned to itself.
  • the method further includes:
  • the eNB sends a message 4 to the first UE and/or the second UE.
  • the sending, by the eNB, the message 4 to the first UE and/or the second UE includes: scheduling a cyclic redundancy check code CRC of the downlink control information DCI of the message 4 to be allocated to the first UE And/or the TC-RNTI of the second UE is scrambled.
  • the message 4 includes at least one set of radio resources, and the first UE and/or the second UE allocates radio resources to itself by the first UE and/or the second UE according to the message 4. At least one set of wireless resources included is determined.
  • the message 4 includes:
  • a set of radio resources allocated to the corresponding first UE or the second UE is allocated to the corresponding first UE or the second UE.
  • the method further includes:
  • the indication signal is a scheduling request SR or confirm ACK signal.
  • the method further includes:
  • the eNB sends, to the first UE and/or the second UE, indication information used to indicate that the first UE and/or the second UE re-initiate random access.
  • the method before the eNB receives the preamble preamble sent by the first UE in the user equipment UE group on a time-frequency resource, the method further includes:
  • the eNB sends a DCI or paging message or a radio resource to the first UE and/or the second UE
  • the source controls the RRC message.
  • the sending, by the eNB, the DCI or the paging message or the RRC message to the first UE and/or the second UE includes at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the receiving, by the eNB, the preamble transmitted by the first UE in the UE group on one time-frequency resource includes:
  • the eNB periodically receives a preamble sent by the first UE on a frequency domain resource.
  • the message 3 and the message 4 include a group identifier of the UE group or a preset field.
  • the message 3 includes the number of UEs with random access requests in the UE group or the number of UEs included in the UE group.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, the method for implementing the random access when the computer executable instructions are executed.
  • the embodiment of the present invention further provides a user equipment UE, where the UE includes: a sending unit and a listening unit;
  • the sending unit is configured to: send a preamble to the evolved base station eNB on a time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource;
  • the monitoring unit is configured to: listen to the random access response RAR corresponding to the preamble sent by the eNB.
  • the monitoring unit includes: a first descrambling subunit, a first receiving subunit, and an allocation subunit, where
  • the first descrambling sub-unit is configured to: perform descrambling on a cyclic redundancy check code CRC for scheduling downlink control information DCI of the RAR according to a preset or radio network temporary identifier RA-RNTI corresponding to the preamble;
  • the first receiving subunit is configured to: receive the RAR; the RAR includes at least one temporary cell radio network temporary identifier TC-RNTI and/or at least one uplink grant;
  • the allocation subunit is configured to determine a TC-RNTI and/or an uplink grant allocated to the UE according to at least one TC-RNTI and/or at least one uplink grant included in the RAR.
  • the allocating subunit is configured to: determine, according to the identifier of the UE itself, a TC-RNTI and/or an uplink grant allocated to the UE according to a preset rule.
  • the monitoring unit includes: a determining subunit, a second descrambling subunit, and a second receiving subunit, where
  • the determining subunit is configured to: determine, according to respective identifiers and/or preambles of the UE, respective RA-RNTIs corresponding to the UEs;
  • the second descrambling subunit is configured to: perform descrambling on the CRC of the DCI that schedules the RAR according to the RA-RNTI corresponding to the UE;
  • the second receiving subunit is configured to: receive the RAR corresponding to the UE itself, where the RAR includes one TC-RNTI and/or one uplink grant that is allocated to the UE.
  • the sending unit is further configured to: send a message 3 according to an uplink grant allocated to the UE itself.
  • the UE further includes a receiving unit, configured to: receive the message 4 sent by the eNB.
  • the receiving the message 4 sent by the eNB includes:
  • the CRC scheduling the DCI of the message 4 is scrambled with the TC-RNTI allocated to the first UE and/or the second UE.
  • the message 4 includes, for the UE, determining to allocate radio resources to itself Less set of wireless resources.
  • the message 4 includes:
  • a set of radio resources allocated to the corresponding UE A set of radio resources allocated to the corresponding UE.
  • the sending unit is further configured to: send, to the eNB, an indication signal used to notify the eNB that the UE access is successful.
  • the indication signal is a scheduling request SR or an acknowledgement ACK signal.
  • the receiving unit is further configured to: receive indication information that is sent by the eNB to instruct the UE to re-initiate random access.
  • the receiving unit is further configured to: receive a DCI or paging message or a radio resource control RRC message sent by the eNB; or receive random access request information sent by the second UE.
  • the receiving, by the eNB, a DCI or a paging message or an RRC message includes at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the sending unit is configured to: periodically send a preamble on a frequency domain resource.
  • the message 3 and the message 4 include a group identifier of the UE group or a preset field.
  • the message 3 includes the number of UEs with a random access request in the UE group or the number of UEs included in the UE group or a preset number of UEs.
  • the preamble and/or the time domain resource and/or the frequency domain resource correspond to the number of UEs with a random access request in the UE group or the number of UEs included in the UE group or a preset number of UEs.
  • An embodiment of the present invention further provides an evolved base station eNB, where the eNB includes: a receiving unit and a sending unit, where
  • the receiving unit is configured to receive a preamble preamble that is sent by the first UE in the user equipment UE group on one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, where the first UE is At least one UE in the UE group;
  • the sending unit is configured to: send a random access response RAR corresponding to the preamble.
  • the RAR includes at least one temporary cell radio network temporary identifier TC-RNTI and/or at least one uplink grant; and the RAR is used by the first UE and/or the second UE according to the identifier of the first UE.
  • the rule determines a TC-RNTI and/or an uplink grant assigned to itself from the at least one TC-RNTI and/or an uplink grant, the second UE being all or part of the UEs in the set of UEs.
  • the RAR includes one TC-RNTI and/or one uplink grant allocated to the corresponding first UE and/or the second UE, where the second UE is all or part of the UE group. UE.
  • the receiving unit is further configured to: receive a message 3 sent by the first UE and/or the second UE according to an uplink grant allocated to itself.
  • the sending unit is further configured to: send a message 4 to the first UE and/or the second UE.
  • the sending the message 4 to the first UE and/or the second UE includes: scheduling a cyclic redundancy check code CRC of the downlink control information DCI of the message 4 to be allocated to the first UE and / or the TC-RNTI of the second UE is scrambled.
  • the message 4 includes at least one set of radio resources for the first UE and/or the second UE to determine a radio resource allocated to itself.
  • the message 4 includes:
  • a set of radio resources allocated to the corresponding first UE or the second UE is allocated to the corresponding first UE or the second UE.
  • the receiving unit is further configured to: receive, send by the first UE and/or the second UE And an indication signal sent to the eNB to notify the first UE and/or the second UE that the access is successful; the indication signal is a scheduling request SR or an acknowledgement ACK signal.
  • the sending unit is further configured to: send, to the first UE and/or the second UE, indication information used to indicate that the first UE and/or the second UE re-initiate random access.
  • the sending unit is further configured to: send a DCI or paging message or a radio resource control RRC message to the first UE and/or the second UE.
  • the sending, by the first UE and/or the second UE, a DCI or a paging message or an RRC message includes at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the receiving unit is configured to: periodically receive, on a frequency domain resource, a preamble sent by the first UE.
  • the message 3 and the message 4 include a group identifier of the UE group or a preset field.
  • the message 3 includes the number of UEs with random access requests in the UE group or the number of UEs included in the UE group.
  • the embodiment of the present invention further provides a system for random access, where the system includes a user equipment UE and an evolved base station eNB;
  • the first UE in the user equipment UE group is configured to: send a preamble to the evolved base station eNB on a time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource;
  • the first UE and/or the second UE in the UE group are configured to: listen to the eNB to send The preamble corresponding to the random access response RAR; wherein the first UE is at least one UE in the UE group, and the second UE is all or part of the UE in the UE group;
  • the eNB is configured to: receive a preamble that is sent by the first UE in the user equipment UE group on one time-frequency resource;
  • a method, device, and system for performing random access where one or more UEs in a user equipment UE group send a preamble to an evolved base station eNB on one time-frequency resource to instruct the eNB to perform UE Random access processing for some or all UEs in the group.
  • a group of UEs only need to occupy one PRACH resource (including time domain resources, frequency domain resources, and preamble) in one random access, so that PRACH resources can be greatly saved and meet the needs of massive machine communication.
  • FIG. 1 is a schematic flowchart of a method for random access according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of another method for random access according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a method for non-contention based random access according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a method for sending a paging message by an eNB to trigger access of a UE group according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a UE according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another UE according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of still another UE according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of an eNB according to an embodiment of the present disclosure.
  • the method may be applied to a user equipment UE side.
  • the method may include:
  • the first UE in the user equipment UE group sends a preamble to the evolved base station eNB on a time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource;
  • S102 The first UE and/or the second UE in the UE group listen to the random access response RAR corresponding to the preamble sent by the eNB;
  • the first UE may be at least one UE in the UE group, and the first UE may be a representative of the UE group; and the second UE may be all or part of the UE in the UE group, that is, having a random connection
  • the UE is requested, and therefore, the first UE may be included in the second UE.
  • the first UE may be at least one of the following:
  • At least one UE determined according to a preset rule At least one UE determined according to a preset rule
  • At least one UE notified by the eNB At least one UE notified by the eNB.
  • the preamble and/or the time domain resource and/or the frequency domain resource may be preset, or may be determined by a group identity of the UE group, or may be notified by an eNB.
  • the second UE in the first UE and/or the UE in the UE group, the RAR corresponding to the preamble sent by the eNB may include:
  • the first UE and/or the second UE performs cyclic redundancy check on downlink control information (DCI, Downlink Control Information) of the RAR according to the preset or the radio network temporary identifier RA-RNTI corresponding to the preamble.
  • DCI downlink control information
  • RA-RNTI radio network temporary identifier corresponding to the preamble.
  • Decoding CRC
  • the first UE and/or the second UE may determine the TC-RNTI and/or the uplink grant allocated to itself according to the preset rule according to the identifier of the first UE.
  • the second UE in the first UE and/or the UE in the UE group, the RAR corresponding to the preamble sent by the eNB may include:
  • the respective corresponding RA-RNTIs Determining, by the first UE and/or the second UE, the respective corresponding RA-RNTIs according to the respective identifiers and/or preambles, and descrambling the CRCs of the DCIs that schedule the RARs according to the respective corresponding RA-RNTIs, And receiving the corresponding RAR, where the RAR includes a TC-RNTI and/or an uplink grant allocated to the corresponding first UE or the second UE.
  • the method may further include:
  • the first UE and/or the second UE transmits a message 3 according to an uplink grant assigned to itself.
  • the method may further include:
  • the first UE and/or the second UE receives the message 4 sent by the eNB.
  • the first UE and/or the second UE receiving the message 4 sent by the eNB may include: scheduling a CRC of the DCI of the message 4 to adopt a TC-RNTI allocated to the first UE and/or the second UE Perform scrambling.
  • the message 4 may include at least one set of radio resources, and the first UE and/or the second UE may determine, according to the at least one set of radio resources included in the message 4, radio resources allocated to itself; The UE may further determine the radio resource allocated to itself from the message 4 according to a preset rule according to its own identifier.
  • the message 4 may also include a set of radio resources allocated to the corresponding first UE or the second UE.
  • the method may further include:
  • the first UE, the second UE, to the eNB transmitting, by the first UE, the second UE, to the eNB, an indication signal for notifying the eNB that the first UE and/or the second UE is successfully accessed; wherein the indication signal may be a scheduling request SR Or confirm the ACK signal.
  • the method may further include:
  • the first UE and/or the second UE receives indication information that is sent by the eNB to instruct the first UE and/or the second UE to re-initiate random access.
  • the method may further include:
  • the first UE receives random access request information sent by the second UE.
  • the first UE and/or the second UE receiving the DCI or paging message or the RRC message sent by the eNB may include at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the method may further include:
  • the first UE counts a random access request of the second UE in the received group
  • the first UE When the count reaches a preset threshold, the first UE sends a preamble on a time-frequency resource.
  • sending, by the first UE in the UE group, a preamble on one time-frequency resource may include:
  • the first UE periodically transmits a preamble on one frequency domain resource.
  • the message identifiers or a preset field of the UE group may be included in the message 3 and the message 4.
  • the number of UEs with random access requests in the UE group may be included in the message 3. Or the number of UEs included in the UE group or a preset number of UEs.
  • the preamble and/or the time domain resource and/or the frequency domain resource may be the number of UEs with a random access request in the UE group or the number of UEs included in the UE group or a preset. The number of UEs corresponds.
  • This embodiment provides a method for random access.
  • the first UE in the user equipment UE group sends a preamble to the evolved base station eNB on one time-frequency resource, and then the second UE in the first UE and/or the UE group.
  • PRACH resource including time domain resources, frequency domain resources, and preamble
  • FIG. 2 is a flowchart of a method for performing random access according to an embodiment of the present invention.
  • the method may be applied to an eNB side, and the method may include:
  • the eNB receives a preamble preamble sent by the first UE in the user equipment UE group on one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource.
  • S202 The eNB sends a random access response (RAR) corresponding to the preamble.
  • RAR random access response
  • the RAR may include at least one temporary cell radio network temporary identifier TC-RNTI and/or at least one uplink grant; the RAR may be used by the first UE and/or the second UE according to the identifier of the first UE.
  • the rules determine the TC-RNTI and/or uplink grants assigned to itself from the at least one TC-RNTI and/or the uplink grant.
  • the RAR may include one TC-RNTI and/or one uplink grant assigned to the corresponding first UE and/or second UE.
  • the first UE in the foregoing S201 to S202 may be at least one UE in the UE group, the first UE can be a representative of the UE group, and the second UE may be in the UE group. All or part of the UE, that is, the UE with the random access request, therefore, the first UE may be included in the second UE.
  • the method may further include:
  • the method may further include:
  • the eNB sends a message 4 to the first UE and/or the second UE.
  • the sending, by the eNB, the message 4 to the first UE and/or the second UE may include: scheduling a cyclic redundancy check code CRC of the downlink control information DCI of the message 4 to be allocated to the first The TC-RNTI of one UE and/or the second UE is scrambled.
  • the message 4 may include at least one set of radio resources, and the first UE and/or the second UE may determine a radio resource allocated to itself according to at least one set of radio resources included in the message 4.
  • the message 4 may also include a set of radio resources allocated to the corresponding first UE or the second UE.
  • the method may further include:
  • the method may further include:
  • the eNB sends indication information to the first UE and/or the second UE to instruct the first UE and/or the second UE to re-initiate random access.
  • the method may further include:
  • the eNB sends a DCI or paging message or a radio resource control RRC message to the first UE and/or the second UE.
  • the sending, by the eNB, the DCI or the paging message or the RRC message to the first UE and/or the second UE may include at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the receiving, by the eNB, the preamble transmitted by the first UE in the UE group on one time-frequency resource may include:
  • the eNB periodically receives a preamble sent by the first UE on a frequency domain resource.
  • the group identifier of the UE group or a preset field may be included.
  • the message 3 may include the number of UEs with random access requests in the UE group or the number of UEs included in the UE group.
  • the present embodiment provides a method for random access. After receiving the preamble transmitted by the first UE in the UE group on one time-frequency resource, the eNB sends the random access response RAR corresponding to the preamble, so that the UE completes the uplink.
  • RAR random access response
  • Authorization and resource allocation so that a group of UEs only need to occupy one PRACH resource (including time domain resources, frequency domain resources and preamble) in one random access, so that PRACH resources can be greatly saved and meet huge amount of machine communication. need.
  • multiple (two and more) UEs form one UE group, one group of UEs There is a group ID as the group identifier, and each UE has its own intra-group ID number, that is, its own identification information.
  • the formation of the group can be one of the following ways:
  • UE For a fixed UE installed by an operator or a UE with a relatively close and fixed location and the same service (for example, the same car of a train or a train), the operator configures these in the background of Operation Management and Maintenance (OAM).
  • OAM Operation Management and Maintenance
  • the network side detects the time advance (TA, Time Advance) value of all the connected terminals, and if the TA values of some terminals remain the same for a period of time, the terminals are configured as a group;
  • TA Time Advance
  • a part of UEs with a relatively close positioning distance is configured as a group.
  • the UEs can communicate with each other, for example, using the discovery technology in Device to Device (D2D), the UE spontaneously forms a group.
  • the UE spontaneously forms a group similar to "discovery" in the D2D technology in the related art. (Can only be used when the UE in the group can communicate.)
  • Example 1 gives a method based on non-contention based random access. Referring to Figure 3, the example includes the following steps:
  • Step 301 When the UE is in the connected state, the eNB allocates a group identifier or a group ID, that is, a Radio Network Temporary Identifier (RNTI), to the UE group.
  • RNTI Radio Network Temporary Identifier
  • Step 302 The eNB notifies the UE group to complete uplink synchronization.
  • the eNB notifies the group of UEs to perform random access, completes uplink synchronization, and the notification signaling may be physical layer signaling or high layer signaling.
  • the physical layer signaling may be a DCI, and the Cyclic Redundancy Check (CRC) code of the DCI is scrambled or masked by the group RNTI; the scrambling or masking
  • the mode may be XORed by bit.
  • the group RNTI is 16 bits, the CRC is also 16 bits, and the bits of the corresponding positions are XORed.
  • the group RNTI is “0000110100001111”.
  • the CRC is "1111001111110011”, and then the CRC is scrambled with the set of RNTIs to obtain "1111111011111100".
  • the UE receiving the scrambled CRC performs XOR of the scrambled CRC and the group RNTI to obtain the CRC before scrambling.
  • the high layer signaling may also be a radio resource control (RRC) message, and the high layer signaling may be public information sent to the UE group, or may be an RRC message sent to a UE.
  • RRC radio resource control
  • the RRC message is used to notify the UE group to access, for example, the UE group can be notified by a bit indication in the RRC message.
  • the notification signaling may include only preamble related information, for example, may include index information of a preamble, and after receiving the notification signaling, may be based on the preamble related information. Determining a preamble to be sent, and the time-frequency resource for sending the preamble may be preset, for example, a fixed time-frequency resource preset by the UE group, or a time-frequency resource previously agreed between the UE group and the eNB; Alternatively, the notification signaling may further include a time domain resource information, that is, the sending subframe information, used to indicate that the UE in the UE group sends the preamble on the subframe, so that the notification message is received.
  • the frequency domain information of the preamble may be preset, for example, a fixed frequency domain resource preset by the UE group, or a frequency domain resource previously agreed between the UE group and the eNB; or
  • the notification signaling may include preamble related information and a frequency domain resource information, so that after receiving the notification signaling, the subframe information for sending the preamble may be preset, for example, the UE group pre- a fixed time domain resource set first, or a time domain resource previously agreed between the UE group and the eNB; or the notification signaling may include preamble related information and time-frequency resource information (including time domain resource information and frequency)
  • the domain resource information, the time domain resource information is the subframe information); or the notification signaling may not include the preamble related information, the time domain resource information, and the frequency domain resource information, and the UE that receives the notification signaling
  • One or more UEs in the group may directly send the preamble agreed with the eNB to the eNB through a pre-agree
  • Step 303 One or more UEs in the UE group send a preamble to the eNB on behalf of the UE in the group.
  • the UE in the UE group After receiving the foregoing notification signaling, the UE in the UE group sends a corresponding (eNB-notified, or pre-set or agreed) preamble on the corresponding (eNB-notified, or pre-set or agreed-up) time-frequency resource. ;
  • the UE that sends the preamble is the first UE, and may be one of the following:
  • a UE with the number 0 is pre-assigned to transmit a preamble, or a UE with an even number in the UE group is pre-designated to transmit a preamble, or all UEs may be designated to transmit a preamble.
  • the UE that sends the preamble is determined according to the number of the UE that sends the preamble and the subframe number of the subframe that receives the physical layer signaling or the high layer signaling; for example, if the physical layer signaling or the high layer signaling is received, the odd number is received.
  • the odd-numbered UE sends the preamble
  • the UE that receives the physical layer signaling or the high-layer signaling is the even-numbered subframe, and the even-numbered UE sends the preamble.
  • the physical layer signaling or the high layer signaling also needs to include the number information of the UE that initiates the random access.
  • the UE After the UE sends the preamble, all UEs listen to the RAR, and the CRC of the PDCCH that schedules the RAR is scrambled or masked with the RA-RNTI, and the RA-RNTI may be preset, for example, and a preamble.
  • the sending time and the transmitted frequency domain resource (in FDD, just the sending moment) are bound:
  • RA-RNTI 1+t_id+10*f_id
  • the RA-RNTI is fixed. In this case, all UEs can listen to the RA-RNTI scrambled PDCCH to obtain the RAR.
  • the time-frequency resource may not be fixed, for example, the frequency domain resource is fixed, but the time domain resource may not be fixed. This situation may only occur when the UE that specifies the preamble is one. In this case, the preamble is sent.
  • the UE may monitor the transmitted time-frequency resource to calculate the RA-RNTI scrambled PDCCH, and the remaining UEs may need to listen to all possible time-frequency resources to calculate a plurality of PDCCHs scrambled by the RA-RNTI.
  • the UE After the UE monitors the RA-RNTI scrambled PDCCH, it can receive the scheduled Physical Downlink Shared Channel (PDSCH), and then obtain the TA information.
  • PDSCH Physical Downlink Shared Channel
  • the random access in the related art is independently performed by each UE, and in this example, a group of UEs only occupy one PRACH resource (including time domain resources, frequency domain resources, and preamble) in one random access. In this way, PRACH resources can be greatly saved.
  • Example 2 provides a method for sending a paging message by an eNB to trigger a UE group access. Referring to FIG. 4, the example includes the following steps:
  • Step 401 The eNB sends a paging message to the UE group.
  • the paging message may be used to wake up all or part of the UE in the idle group to perform random access.
  • the paging message may include at least one of the following:
  • a group ID which may be included in a paging message, or may use a group ID to scramble a CRC of a PDCCH that schedules a paging message.
  • the number of the UE that initiated the random access that is, the UE-ID.
  • Preamble ID, or Preamble ID can also be preset without notification.
  • time domain and/or frequency domain resources may also be unannounced, preset, or time domain resources may be preset, frequency domain resources are notified, or may be frequency Domain resources are preset, and time domain resources are notified.
  • the number (UE-ID) of some UEs in the group 5 may include this information only when some of the UEs are awake for random access.
  • the UE that initiates the random access may be determined in the following manner:
  • One or more UEs in the specified UE group initiate random access. For example, a UE with a predefined number of 0 sends a preamble, or a UE with a predefined number is sent a preamble, or all UEs send a preamble.
  • the one or more UEs that are determined according to a certain rule initiate a random access, for example, according to the correspondence between the number of the UE that sends the preamble and the subframe that receives the physical layer signaling or the high layer signaling, One or more UEs that are accessed; for example, if an odd subframe is received, an odd numbered UE sends a preamble, and an even subframe is an even numbered UE that transmits a preamble;
  • one or more UEs that initiate random access determined by the above manner may be the same as or different from the UE that the eNB requires to wake up, and the difference may include: partially different or all different.
  • Step 402 After receiving the paging message, the UE in the UE group performs random access.
  • random access can be implemented in the following three ways:
  • Step 1 The one or more UEs that initiate random access send a preamble on the time-frequency resource.
  • Step 2 After receiving the preamble, the eNB sends an RAR, and the RAR carries the TA and at least one of the following information:
  • the TC-RNTI information may include M TC-RNTIs, where M is the number of UEs in the group, or the number of UEs that need to wake up, or is a preset value;
  • the TC-RNTI may be in the form of an absolute value, that is, a 16-bit C-RNTI, or may be an absolute value of one C-RNTI and a relative value of the M-1 C-RNTIs relative to the absolute value, and the group needs to be awakened. All UEs or some UEs may correspond to different TC-RNTIs according to preset rules, for example, corresponding to the UE-IDs from small to large, or randomly corresponding; or
  • the TC-RNTI information may be a TC-RNTI, and all UEs or some UEs in the group may correspond to TC-RNTI, TC-RNTI+1, TC-RNTI+2, ..., TC- according to preset rules.
  • RNTI+M-1 for example, corresponds to the UE-ID from small to large, or randomly.
  • uplink grant (UL grant, UpLink grant) information
  • the UL grant information may be M independent UL grant information, or may be one UL grant information including M scheduling information; all UEs or partial UEs in the group may respectively correspond to different UL grants according to preset rules.
  • Information for example, corresponding to the UE-ID from small to large, or randomly corresponding; or,
  • the UL grant information may be a UL grant, and all UEs or some UEs that need to be woken up in the group may respectively correspond to UL grants allocated to themselves according to preset rules; for example, assume that resources in the UL grant are allocated as physical For the resource bearer (PRB, Physical Resource Bearer) #0 ⁇ 3, each UE can determine the resources allocated to the UE according to its own number, for example, UE#1 corresponds to PRB#4 ⁇ 7, or randomly corresponding, and the remaining UE information For example, the Modulation and Coding Scheme (MCS) can be the same as in the UL grant.
  • PRB Physical Resource Bearer
  • MCS Modulation and Coding Scheme
  • the eNB may also send M RARs.
  • Each RAR can be scrambled with a different RA-RNTI.
  • the UE may determine an RA-RNTI to descramble the DCI of the DCI according to its own number (UE-ID) and a preset rule, and receive the corresponding RAR.
  • UE-ID its own number
  • the RA-RNTI of the UE whose UE-ID is UE#0 may be determined according to the time-frequency resource of the preamble, and UE#1, UE#2 and UE#n respectively correspond to RA-RNTI+1 and RA-RNTI+ respectively. 2 up to RA-RNTI+n; or, different numbers of UEs may correspond to any of RA-RNTI+1, RA-RNTI+2, ..., RA-RNTI+n.
  • Step 3 All UEs or part of the UEs in the group (all or part of the UEs refer to all or part of the UEs that the eNB requires to wake up) respectively send messages (Msg, Message) 3 on the resources corresponding to their UL grants.
  • Step 4 For the Msg 3 sent in step 3, the eNB sends Msg 4 respectively.
  • the RAR reception in this mode is important.
  • the RAR can be resent in one window.
  • the eNB may resend the call message to notify these UEs to access.
  • Step 1 The one or more UEs that initiate random access send a preamble on the time-frequency resource.
  • Step 2 After receiving the preamble, the eNB sends an RAR, where the RAR carries a TA information, a TC-RNTI, and a UL grant.
  • Step 3 All UEs or part of UEs in the group (all or part of the UEs refer to all or part of the UEs that the eNB requires to wake up) listen to the RAR to obtain the TA and the TC-RNTI.
  • Step 4 One or more UEs send Msg 3, where the one or more UEs may be the one or more UEs that send the preamble in step 1 or one of the multiple UEs (such as UE) The smallest ID), the sent Msg 3 carries a group ID or a preset value, and the preset value may be well known to the UE in the group.
  • Step 5 The eNB sends the Msg 4, which carries the group ID, and the Msg 4 is scrambled by the TC-RNTI.
  • the Msg 4 may further include M-1 C-RNTIs, or may not be included.
  • M-1 C-RNTIs In the case where M-1 C-RNTIs are included, all UEs or part of UEs in the group (all or part of UEs refer to all or part of UEs that the eNB requires to wake up) may select one TC-RNTI according to its own intra-group number.
  • the C-RNTI for example, the UE numbered as UE#5, corresponds to the fifth TC-RNTI; or the UE may randomly select one TC-RNTI as its own C-RNTI; for Msg 4, the TC-RNTI is not included. In this case, all UEs or some UEs in the group can calculate a C-RNTI as their own C-RNTI according to the preset formula according to their own intra-group number.
  • the DCI of the scheduled Msg 4 can be The CRC-scrambled TC-RNTI is incremented by 5 to obtain its own C-RNTI; or the UE may randomly select one of the TC-RNTI to the TC-RNTI+M-1 as its own C-RNTI.
  • the Msg 4 may further include one or M radio resource configuration information, such as a CQI feedback resource, an SR resource, and the like.
  • M radio resource configuration information is included in Msg 4
  • all UEs or some UEs in the group may select one set of radio resource configuration information according to their intra-group number as their own radio resource configuration.
  • the selection method here may be the same as above.
  • the choice of TC-RNTI is similar.
  • the Msg 4 includes one radio resource configuration information
  • all UEs or some UEs in the group can obtain their own radio resource configuration according to the preset formula according to their own intra-group number.
  • the radio resource configuration includes the SR configuration
  • the UE numbered #5 can be configured as the SR configuration included in the radio resource configuration +5; or the SR configuration corresponding to different UEs can be determined in a randomly selected manner.
  • RAR and Msg 4 In this mode, the reception of RAR and Msg 4 is important. In order to prevent the UE from detecting RAR and Msg 4, RAR and Msg 4 can be repeatedly transmitted in one window.
  • Step 1 The one or more UEs send a preamble on the time-frequency resource.
  • Step 2 The eNB sends an RAR, where the RAR carries one TA information, M TC-RNTIs, and one UL grant.
  • All UEs in the group or some UEs can listen to the RAR and get the TA and TC-RNTI.
  • the one or more UEs that send the preamble in the first step or one of the plurality of UEs may send the Msg 3, carrying the group ID or a preset value.
  • Step 3 The eNB sends the Msg 4, and the Msg 4 carries the group ID or the preset value, and the UE listens to the Msg 4.
  • the eNB may send an Msg 4, where the Msg 4 may be scrambled by using the TC-RNTI in the Msg 3, and include one set or M sets of radio resources (may also continue to carry multiple TC-RNTIs) .
  • the UE may determine the C-RNTI and radio resources allocated to itself in a similar manner in mode 2; or,
  • the eNB may send multiple Msg 4s, and the multiple Msg 4s are scrambled by M TC-RNTIs respectively.
  • the UE may select one TC-RNTI according to its own number or randomly, and receive the Msg of the TC-RNTI scrambled DCI scheduling. 4.
  • the eNB may re-peg these UEs for access.
  • Example 3 gives a method for a group of UEs to contend for access.
  • the example includes the following steps:
  • Step 501 One or more UEs in the UE group periodically send a preamble to the eNB on one time-frequency domain resource to initiate random access to the eNB.
  • the UE that sends the preamble may be one of the following:
  • the UE with the number 0 may be pre-assigned to send the preamble, or the UE with the even number in the UE group may be pre-specified to send the preamble, or all the UEs may be designated to send the preamble.
  • the UE that sends the preamble is determined according to the number of the UE that sends the preamble and the received subframe number of the physical layer signaling or the higher layer signaling; for example, if the odd subframe is received, the number is odd.
  • the UE sends a preamble, and the UE that receives the even subframe is evenly numbered to send the preamble.
  • the transmission period and the offset of the subframe in which the preamble is transmitted may be set in advance according to actual needs, and the set transmission period and the offset of the subframe in which the preamble is transmitted may be known to all UEs in the group.
  • the UE services in the group are the same, and each access is accessed in the entire group. In another case, only a part of the UEs need to be connected for each access in the group. In. The number of UEs accessed in the latter case may be random.
  • random access can be implemented in the following three ways:
  • Step 1 The one or more UEs that initiate random access send a preset preamble on a preset time-frequency resource.
  • the preamble resource has a corresponding relationship with the group ID.
  • Step 2 After receiving the preamble, the eNB learns that the UE is accessing a group of UEs by using the PRACH resources (time-frequency resource information or preamble information) sent by the UE. After that, the eNB sends an RAR, and the RAR carries the TA. And at least one of the following information:
  • the TC-RNTI information may include M TC-RNTIs, where M is the number of UEs in the group, or the number of UEs that need to initiate random access, or a preset value;
  • M is the number of UEs in the group, or the number of UEs that need to initiate random access, or a preset value;
  • the eNB knows the information of the UE group in advance, such as the number of UEs in the UE group, then the eNB Determining the UE group that initiates the random access by using the received preamble and the time-frequency resource information, so as to determine the information of the UE group, so that the number of UEs M or M of the group of UEs may also be a preset value;
  • the UE may also carry the preamble number of the UEs of the group, or the number M of UEs that need to initiate random access in the UE group, or a preset value M; the M TC-RNTIs may be
  • the form that is, the 16-bit C-RNTI; or may be the absolute value of one C-RNTI and the relative value of the M-1 C-RNTIs relative to the absolute value.
  • all UEs or some UEs that need to initiate random access in the UE group can determine their own TC-RNTI according to preset rules, for example, according to the UE-ID from small to large.
  • the order corresponds to different TC-RNTIs or randomly corresponding TC-RNTIs; or
  • the TC-RNTI information may be a TC-RNTI, and all UEs or some UEs in the group may correspond to TC-RNTI, TC-RNTI+1, TC-RNTI+2, ..., TC-RNTI+ according to preset rules.
  • M-1 for example, corresponds to the UE-ID from small to large, or randomly.
  • uplink grant (UL grant, UpLink grant) information
  • the UL grant information may be M independent UL grant information, or may be one UL grant information including M scheduling information; all UEs or partial UEs in the group may respectively correspond to different UL grants according to preset rules.
  • Information for example, corresponding to the UE-ID from small to large, or randomly corresponding; or,
  • the UL grant information may be a UL grant, and all UEs or some UEs that need to perform random access in the group may respectively allocate corresponding UL grants according to preset rules; for example, assume resource allocation in the UL grant.
  • the UE For the physical resource bearer (PRB), the UE can determine the resources allocated to the UE according to its own number. For example, UE#1 can correspond to PRB#4-7, or can be randomly matched.
  • the remaining UE information such as the Modulation and Coding Scheme (MCS), may be the same as in the UL grant.
  • MCS Modulation and Coding Scheme
  • the eNB may also send M RARs.
  • Each RAR can be scrambled with a different RA-RNTI.
  • the UE may determine an RA-RNTI to descramble the DCI of the DCI according to its own number (UE-ID) and a preset rule, and may receive the corresponding RAR.
  • UE-ID its own number
  • the RA-RNTI of the UE whose UE-ID is UE#0 is determined according to the time-frequency resource of the preamble, and UE#1, UE#2 and UE#n respectively correspond to RA-RNTI+1 and RA-RNTI+2, respectively.
  • Up to RA-RNTI+n; or, different numbered UEs may also correspond to RA-RNTI+1, any of the RA-RNTI+2, ..., RA-RNTI+n.
  • Step 3 All the UEs in the UE group or some UEs (the UEs that need to perform random access) respectively send Msg 3 on the resources corresponding to the UL grant corresponding to the UE.
  • Step 4 The eNB sends Msg 4 according to the received Msg 3.
  • the number of the Msg 4 may be the same as the number of Msg 3 received by the eNB.
  • the reception of the RAR is important.
  • it may be considered to repeatedly transmit the RAR in one window.
  • the group of UEs may re-initiate access or access according to the related art, that is, a single UE initiates random access.
  • Step 1 The one or more UEs that initiate random access send a preset preamble on a preset time-frequency resource.
  • the preamble resource has a corresponding relationship with the group ID.
  • Step 2 After receiving the preamble, the eNB learns that the UE is accessing a group of UEs by using the PRACH resources (time-frequency resource information or preamble information) sent by the UE. After that, the eNB sends an RAR, and the RAR carries the TA. , TC-RNTI and other information.
  • PRACH resources time-frequency resource information or preamble information
  • Step 3 All UEs in the UE group or some UEs (UEs that need to perform random access) listen to the RAR to obtain the TA and the TC-RNTI.
  • Step 4 One or more UEs send Msg 3, where the one or more UEs may be the one or more UEs that send the preamble in step 1 or one of the multiple UEs (such as UE) The smallest ID), the sent Msg 3 can carry a group ID.
  • Step 5 The eNB sends the Msg 4, which carries the group ID, and the Msg 4 is scrambled by the TC-RNTI.
  • the Msg 4 may further include M-1 C-RNTIs, or may not be included.
  • the Msg 4 may further include one or M radio resource configuration information, such as a CQI feedback resource, an SR resource, and the like.
  • the UE may determine the C-RNTI allocated to itself and the radio resource configuration information according to the manner similar to mode 2 in the second embodiment.
  • Step 1 The one or more UEs send a preset preamble on a preset time-frequency resource.
  • the preamble resource has a corresponding relationship with the group ID.
  • Step 2 The eNB learns that the UE is connected to represent a group of UEs by using the PRACH resource (time-frequency resource information or preamble information) sent by the UE. After that, the eNB sends the RAR, and the RAR carries information such as the TA and the M TC-RNTI.
  • PRACH resource time-frequency resource information or preamble information
  • Step 3 All UEs in the group or part of the UEs (the UEs that are required to perform random access) listen to the RAR to obtain the TA and the TC-RNTI.
  • Step 4 The one or more UEs that send the preamble in step 1 or one of the plurality of UEs (such as the one with the smallest UE ID) sends Msg 3, where the Msg 3 carries a group ID.
  • the Msg 3 is scrambled by a TC-RNTI, and the TC-RNTI may be The first TC-RNTI in the TC-RNTI obtained in step 3.
  • Step 5 The eNB sends Msg 4, and all UEs or part of UEs in the group (the all UEs or some UEs refer to UEs that need to perform random access) listen to Msg 4.
  • Msg 4 can be one of the following:
  • the Msg 4 may carry the group ID, may also include one set or M sets of radio resources, and may continue to carry the M TCs in step 2. Multiple in RNTI.
  • the Msg 4 may further include one or M radio resource configuration information, such as a CQI feedback resource, an SR resource, and the like. The UE receiving the Msg 4 may determine the C-RNTI allocated to itself and the radio resource configuration information in a manner similar to that in the mode 2 in the second example.
  • the monitored Msg 4 may be multiple Msg 4, and the multiple Msg 4 may be scrambled by M TC-RNTIs respectively, and the group ID may be carried in Msg 4.
  • Msg 4 can support Hybrid Automatic Repeat ReQuest (HARQ). Therefore, in this case, each UE can feed back its corresponding Msg 4 and send an acknowledgment (ACK, Acknowledgement) message, thus avoiding resources. Waste, in this case, if the eNB does not receive the ACK sent by the UE, it can be considered that the set of resources is not used by the UE.
  • HARQ Hybrid Automatic Repeat ReQuest
  • the group of UEs may re-initiate random access, or may implement access of the corresponding UE according to the manner in the related art, that is, a single UE separately initiates random access.
  • the uplink data sent by the UE may always collide, causing the transmission to fail. If the eNB finds that these UEs always fail to transmit, the eNB may send indication signaling to re-access it.
  • the UE may send a message indicating that it occupies a certain set of resources. If the eNB does not receive the information for a certain set of resources, the eNB considers that the set of resources is not occupied by the UE. For example, a time window may be defined, in which the UE sends an indication message indicating that it occupies the set of resources (TC-RNTI, radio resource), and the indication information may be SR, ACK, etc., if the eNB does not receive the If the indication information is described, the eNB considers that the set of resources is a wasteful resource and can be allocated to other UEs.
  • Example 4 gives a method for a group of UEs to compete for access.
  • the UEs in the UE group can communicate with each other.
  • the UEs in the group can use short-distance communication methods such as Wireless Fidelity (WIFI) and D2D to implement interaction.
  • WIFI Wireless Fidelity
  • the first UE when a member of the group needs to initiate random access, it is first reported to the first UE (hereinafter, the first UE is referred to as a group leader), and the group leader can access according to a certain period, for example, 100 ms once, if 100 ms. If all the UEs do not have a random access request, the access may not be initiated; if one or more UEs have a random access request, the group leader may initiate random access; or the group leader may be randomly connected. Random access is initiated when the incoming request reaches a certain number.
  • the group leader may be a preset, or a UE fixed to an ID number, such as a UE with an ID number of 0, or a UE in the UE group as a group leader according to a certain rule; or
  • the UEs with the same service type may be divided into one group.
  • the UEs initiate random access at a fixed time
  • the group leader can initiate random access instead of the entire group of UEs at a fixed time.
  • the process in which the group leader represents the entire group of UEs or part of the UEs for random access is given in the following manners 1 to 3.
  • Step 1 The group leader sends a preamble on the specified time-frequency resource.
  • Step 2 The eNB learns that the UE is a group leader by using the PRACH resource (time-frequency resource information or preamble information) sent by the UE, and sends the RAR.
  • the RAR carries information such as the TA and the TC-RNTI.
  • Step 3 The group leader sends Msg 3, and Msg 3 carries the number of UEs in the group that need to be randomly accessed.
  • Step 4 The eNB sends Msg 4, Msg 4 is scrambled by TC-RNTI, and Msg 4 may include M-1 C-RNTI values, or M-1 and TC-RNTI difference values, or may not Optionally, the Msg 4 may further include one set or M sets of radio resource configuration information, such as CQI feedback resources, SR resources, and the like.
  • Step 5 The group leader notifies the UE that has the need for the random access, and may perform the notification by using the broadcast mode or by using the unicast mode.
  • Step 1 The group leader sends a preamble on a certain time-frequency resource, where the PRACH resource corresponds to the number M of UEs that need to be randomly accessed, or the number of requests that the eNB knows to randomly access;
  • Step 2 The eNB learns that the UE is a group leader by using the PRACH resource (time-frequency resource information or preamble information) sent by the UE that sends the preamble, and sends the RAR.
  • the RAR carries information such as a TA and a TC-RNTI.
  • Step 3 The team leader sends Msg 3;
  • Step 4 The eNB sends Msg 4, Msg 4 is scrambled by TC-RNTI, and Msg 4 may include M-1 C-RNTI values, or M-1 and TC-RNTI difference values, or may not
  • the remaining TC-RNTIs may be obtained according to preset rules, such as TC-RNTI, TC-RNTI+1, ..., TC-RNTI+M-1.
  • the Msg 4 may further include a set or a set of radio resource configuration information, such as a channel quality indicator (CQI, Channel Quality Indicator) feedback resource, an uplink scheduling request (SR, Scheduling Request) resource, and the like.
  • CQI Channel Quality Indicator
  • SR Scheduling Request
  • the broadcast mode or the unicast mode may be used.
  • Step 1 The group leader sends a preamble on a certain time-frequency resource, where the PRACH resource corresponds to the number M of UEs that need to perform random access, or the number of requests that the eNB knows to randomly access;
  • Step 2 The eNB learns that the UE is a group leader by using the PRACH resource (time-frequency resource information or preamble information) sent by the UE, and sends the RAR.
  • the RAR carries information such as TA and M TC-RNTI.
  • Step 3 The UE sends Msg 3, and the Msg 3 performs scrambling using one of the M TC-RNTIs.
  • Step 4 The eNB sends Msg 4, which is scrambled by the TC-RNTI in Msg 3.
  • the Msg 4 may include one set or M sets of radio resources (and may continue to carry M TC-RNTIs).
  • the group member knows the RA-RNTI by knowing the PRACH resources (including the time-frequency resources and the preamble) sent by the group leader by short-distance communication.
  • the process of implementing random access includes the following steps:
  • Step 1 The group leader UE sends a preamble on a certain time-frequency resource, where the PRACH resource corresponds to the number M of UEs that need to perform random access;
  • Step 2 The eNB learns that the UE is a group leader by using the PRACH resource (time-frequency resource information or preamble information) sent by the UE, and sends the RAR, where the RAR carries the TA, the TC-RNTI information, and the UL grant information.
  • Method 1 is similar.
  • Step 3 The UE having the access request in the group respectively sends Msg 3 on the resource corresponding to the UL grant corresponding to the UE;
  • Step 4 The eNB sends Msg 4 according to the received Msg 3, and the number of the Msg 4 is the same as the number of Msg 3 received by the eNB.
  • the eNB may repeatedly transmit the RAR in one window.
  • the group member knows the RA-RNTI by knowing the PRACH resources (including the time-frequency resources and the preamble) sent by the group leader through short-distance communication.
  • the random access process includes the following steps:
  • Step 1 The group leader sends a preamble on a certain time-frequency resource.
  • Step 2 The eNB, through the received PRACH resource (time-frequency resource information or preamble information), learns that the UE that sends the PRACH resource is a group leader, and sends an RAR, where the RAR carries information such as a TA and a TC-RNTI.
  • PRACH resource time-frequency resource information or preamble information
  • Step 3 All UEs with access requests in the UE or group listen to the RAR to obtain the TA and the TC-RNTI.
  • Step 4 After listening to the RAR, the group leader UE sends Msg 3, carries the group ID or a preset value, and the number M of UEs in the group that need to perform random access.
  • the group ID or a preset value may be notified by the group leader, or may be notified by the network side, or may be preset.
  • Step 5 The eNB sends the Msg 4, and the Msg 4 carries the group ID or the preset value in the previous step.
  • the Msg 4 is scrambled by the TC-RNTI, and the Msg 4 may further include the M-1 C-RNTI values. as well as One set or M sets of wireless resource configuration information. All UEs with access requests in the UE/UE group can listen to the TC-RNTI scrambled Msg 4, and obtain their own C-RNTI and radio resource configuration information according to a preset rule.
  • the group member UE Before the implementation of the mode, the group member UE can know the PRACH resource (preamble) sent by the group leader UE, thereby learning the RA-RNTI. In this mode, the reception of RAR and Msg 4 is important. In order to avoid UE missed detection of RAR and Msg 4, it may be considered to repeatedly transmit RAR and Msg 4 in one window.
  • the group member UE knows the PRACH resources (including the time-frequency resources and the preamble) sent by the group leader UE, thereby learning the RA-RNTI.
  • the random access procedure in this example includes the following steps:
  • Step 1 The UE sends a preamble on a certain time-frequency resource, where the PRACH resource corresponds to the number M of UEs that need to perform random access, or the number of requests that the eNB knows to randomly access;
  • Step 2 The eNB learns that the UE is a group leader by using the received PRACH resource (time-frequency resource information or preamble information), and sends an RAR, where the RAR carries information such as a TA and a TC-RNTI.
  • PRACH resource time-frequency resource information or preamble information
  • Step 3 The UE with the access request in the group listens to the RAR, and obtains the TA and the TC-RNTI.
  • Step 4 The group leader sends Msg 3, carrying an ID that is known to all UEs in the group;
  • Step 5 After receiving the Msg 3, the eNB sends the Msg 4, and the Msg 4 is scrambled by the TC-RNTI, and the Msg 4 includes the M-1 C-RNTI values, or the M-1 and the TC-RNTI. And include a set or M sets of wireless resources.
  • Step 6 All UEs in the UE group or the UEs with access requests in the group listen to the Msg 4 scrambled by the TC-RNTI, and obtain their own C-RNTI and radio resource configuration information according to a preset rule.
  • the group member UE knows the PRACH resources (including the time-frequency resources and the preamble) sent by the group leader UE, thereby learning the RA-RNTI.
  • the random access procedure in this mode includes the following steps:
  • Step 1 The UE sends a preamble on a certain time-frequency resource, where the PRACH resource corresponds to the number M of UEs that need to perform random access, or the number of requests that the eNB knows to randomly access;
  • Step 2 The eNB, through the received PRACH resource (time-frequency resource information or preamble information), learns that the UE that sends the PRACH resource is a group leader, and sends an RAR, where the RAR carries information such as a TA and multiple TC-RNTIs.
  • PRACH resource time-frequency resource information or preamble information
  • Step 3 The group leader sends Msg 3 with a TC-RNTI, carrying the group ID or a preset value.
  • Step 4 After receiving the Msg 3, the eNB sends the Msg 4, and the Msg 4 may be a message scrambled by the TC-RNTI in the Msg 3.
  • the Msg 4 may include one set or M sets of radio resources (may also continue Carry multiple TC-RNTIs). All UEs with access requests in the UE/group can listen to the TC-RNTI scrambled Msg 4 and obtain their own C-RNTI and radio resource configuration information according to a preset rule.
  • the eNB may also send multiple Msg 4s, scrambled with multiple TC-RNTIs, respectively. All the UEs in the UE or the group with the need for the random access may receive the C-RNTI corresponding to the C-RNTI according to a preset rule or randomly determine the C-RNTI corresponding to the C-RNTI.
  • the uplink data sent by the UE may always collide, causing the transmission to fail. If the eNB finds that these UEs always fail to transmit, the eNB may send indication signaling to re-access it.
  • the UE may send a message indicating that it occupies a certain set of resources. If the eNB does not receive the information for a certain set of resources, the eNB considers that the set of resources is not occupied by the UE. For example, a time window may be defined, in which the UE sends an indication message indicating that it occupies the set of resources (TC-RNTI, radio resource), and the indication information may be SR, ACK, etc., if the eNB does not receive the If the indication information is described, the eNB considers that the set of resources is a wasteful resource and can be allocated to other UEs.
  • the embodiment of the present invention provides a user equipment UE 50, which may include: a sending unit 501 and a listening unit 502;
  • the sending unit 501 is configured to: before sending to an evolved base station eNB on one time-frequency resource a preamble, where the time-frequency resource includes a time domain resource and a frequency domain resource;
  • the monitoring unit 502 is configured to: listen to the random access response RAR corresponding to the preamble sent by the eNB.
  • the listening unit 502 may include: a first descrambling subunit 5021A, a first receiving subunit 5022A, and an assigning subunit 5023A, where
  • the first descrambling sub-unit 5021A is configured to: descramble the cyclic redundancy check code CRC of the downlink control information DCI that schedules the RAR according to the preset or the radio network temporary identifier RA-RNTI corresponding to the preamble ;
  • the first receiving subunit 5022A is configured to: receive the RAR; the RAR includes at least one temporary cell radio network temporary identifier TC-RNTI and/or at least one uplink grant;
  • the allocation sub-unit 5023A is configured to determine a TC-RNTI and/or an uplink grant allocated to the UE itself according to at least one TC-RNTI and/or at least one uplink grant included in the RAR.
  • the allocating sub-unit 5023A is configured to: determine, according to the identifier of the UE itself, a TC-RNTI and/or an uplink grant allocated to the UE according to a preset rule.
  • the listening unit 502 may include: a determining subunit 5021B, a second descrambling subunit 5022B, and a second receiving subunit 5023B, where
  • the determining sub-unit 5021B is configured to: determine respective RA-RNTIs of the UE according to the respective identifiers and/or preambles of the UEs;
  • the second descrambling sub-unit 5022B is configured to: perform descrambling on the CRC of the DCI that schedules the RAR according to the RA-RNTI corresponding to the UE;
  • the second receiving sub-unit 5023B is configured to: receive the RAR corresponding to the UE itself, where the RAR includes one TC-RNTI and/or one uplink grant that is allocated to the UE.
  • the sending unit 501 is further configured to: send a message 3 according to an uplink grant allocated to the UE itself.
  • the UE 50 may further include a receiving unit 503, which may be configured to: receive the message 4 sent by the eNB.
  • the receiving the message 4 sent by the eNB may include:
  • the CRC scheduling the DCI of the message 4 is scrambled with the TC-RNTI allocated to the first UE and/or the second UE.
  • the message 4 may include at least one set of radio resources for the UE to determine a radio resource allocated to itself.
  • the message 4 may include: a set of radio resources allocated to the corresponding UE.
  • the sending unit 501 may be further configured to: send an indication signal to the eNB, to notify the eNB that the UE access is successful.
  • the indication signal may be a scheduling request SR or an acknowledgement ACK signal.
  • the receiving unit 503 is further configured to: receive indication information that is sent by the eNB to instruct the UE to re-initiate random access.
  • the receiving unit 503 may be further configured to: receive a DCI or paging message or a radio resource control RRC message sent by the eNB;
  • the receiving, by the eNB, a DCI or a paging message or an RRC message may include at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the sending unit 501 is configured to: periodically send a preamble on a frequency domain resource.
  • the group ID or a preset field of the UE group may be included in the message 3 and the message 4.
  • the message 3 may include the number of UEs with a random access request in the UE group or the number of UEs included in the UE group or a preset number of UEs.
  • the preamble and/or the time domain resource and/or the frequency domain resource may correspond to the number of UEs with a random access request in the UE group or the number of UEs included in the UE group or a preset number of UEs. .
  • an embodiment of the present invention provides an evolved base station eNB 80, which may include: a receiving unit 801 and a sending unit 802, where
  • the receiving unit 801 is configured to: receive a preamble that is sent by the first UE in the user equipment UE group on one time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and the first UE At least one UE in the UE group;
  • the sending unit 802 is configured to: send a random access response RAR corresponding to the preamble.
  • the RAR may include at least one temporary cell radio network temporary identifier TC-RNTI and/or at least one uplink grant; the RAR may be used by the first UE and/or the second UE according to its own identifier.
  • the rule is determined from the at least one TC-RNTI and/or the uplink grant to determine a TC-RNTI and/or an uplink grant assigned to itself, and the second UE may be all or part of the UE in the UE group.
  • the RAR may include one TC-RNTI and/or one uplink grant assigned to the corresponding first UE and/or second UE, and the second UE may be all in the UE group Or part of the UE.
  • the receiving unit 801 is further configured to: receive a message 3 sent by the first UE and/or the second UE according to an uplink grant allocated to itself.
  • the sending unit 802 is further configured to: send a message 4 to the first UE and/or the second UE.
  • the sending the message 4 to the first UE and/or the second UE may include: scheduling a cyclic redundancy check code CRC of the downlink control information DCI of the message 4 to be allocated to the first UE And/or the TC-RNTI of the second UE is scrambled.
  • the message 4 may include at least one set of radio resources for the first UE and/or the second UE to determine a radio resource allocated to itself.
  • the message 4 may include: a set of radio resources allocated to the corresponding first UE or the second UE.
  • the receiving unit 801 may be further configured to: receive, by the first UE and/or the second UE, to notify the eNB that the first UE and/or the second UE is successfully accessed.
  • the indication signal is a scheduling request SR or an acknowledgment ACK signal.
  • the sending unit 802 may be further configured to: send, to the first UE and/or the second UE, the first UE and/or the second UE to re-initiate random access indication information.
  • the sending unit 802 may be further configured to: send a DCI or paging message or a radio resource control RRC message to the first UE and/or the second UE.
  • the sending the DCI or the paging message or the RRC message to the first UE and/or the second UE may include at least one of the following:
  • the DCI, or the CRC of the DCI that schedules the paging message or the RRC message, is scrambled by using the group identifier of the UE group;
  • the group identifier of the UE group is included in the DCI or paging message or RRC message;
  • the DCI or the paging message or the RRC message includes an identifier of the first UE and/or the second UE;
  • the DCI or paging message or RRC message includes a Preamble identifier and/or a time domain resource of the Preamble and/or a frequency domain resource of the preamble.
  • the receiving unit 801 is configured to: periodically receive, on a frequency domain resource, a preamble sent by the first UE.
  • the group ID or a preset field of the UE group may be included in the message 3 and the message 4.
  • the message 3 may include the number of UEs with random access requests in the UE group or the number of UEs included in the UE group.
  • the embodiment of the present invention further provides a system for random access, where the system includes a user equipment UE and an evolved base station eNB;
  • the first UE in the user equipment UE group is configured to: send a preamble to the evolved base station eNB on a time-frequency resource, where the time-frequency resource includes a time domain resource and a frequency domain resource;
  • the first UE and/or the second UE in the UE group are configured to: listen to the random access response RAR corresponding to the preamble sent by the eNB, where the first UE is in the UE group At least one UE, the second UE is all or part of the UE in the UE group;
  • the eNB is configured to: receive a preamble that is sent by the first UE in the user equipment UE group on one time-frequency resource;
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, the method for implementing the random access when the computer executable instructions are executed.
  • embodiments of the invention may be provided as a method, system, or computer program product.
  • embodiments of the invention may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware.
  • embodiments of the invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • Embodiments of the invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • the computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to produce a machine for generating instructions by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the computer readable memory is stored in the computer readable memory.
  • the instructions in the production result include an article of manufacture of the instruction device that implements the functions specified in one or more blocks of the flowchart or in a flow or block of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/functional unit in the above embodiment When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • a method, device, and system for performing random access where one or more UEs in a user equipment UE group send a preamble to an evolved base station eNB on one time-frequency resource to instruct the eNB to perform UE Random access processing for some or all UEs in the group.
  • a group of UEs only needs to occupy one PRACH resource (including time domain resources, frequency domain resources, and preamble) in one random access, so that PRACH resources can be greatly saved and meet the needs of huge machine communication.

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Abstract

一种随机接入的方法包括：用户设备UE组内的第一UE在一个时频资源上向演进基站eNB发送前导preamble；所述第一UE和/或所述UE组内的第二UE监听所述eNB发送的所述preamble对应的随机接入响应RAR；其中，所述第一UE为所述UE组内的至少一个UE，所述第二UE为所述UE组中的全部或者部分UE。

Description

一种随机接入的方法、设备和系统 技术领域
本申请涉及但不限于通信领域，尤其涉及一种随机接入的方法、设备和系统。
背景技术
机器类型通信(Machine Type Communication，简称为MTC)用户终端(User Equipment，简称用户设备或终端)，又称，机器到机器(Machine to Machine，简称M2M)用户通信设备，是目前物联网的主要应用形式。
近年来，由于长期演进(Long-Term Evolution，简称为LTE)/高级长期演进(Long-Term Evolution Advance，简称为LTE-Advance或LTE-A)系统的频谱效率高，越来越多的移动运营商选择LTE/LTE-A作为宽带无线通信系统的演进方向。基于LTE/LTE-A的MTC多种类数据业务也将更具吸引力。
在LTE系统中，随机接入是一个基本的功能，UE只有通过随机接入过程，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无竞争的随机接入两种形式。
初始的随机接入过程，是一种基于竞争的接入过程，可以分为四个步骤。
(1)UE发送preamble(前导)，UE随机选择一个可用的preamble进行发送。
(2)eNB(Evolved Node B，演进型节点B，也称为演进基站)发送随机接入响应(RAR，Random Access Response)。当eNB检测到UE发送的前导序列，就会在下行同步信道(DL-SCH，DownLink-Synchronization Channel)上发送一个响应，包含：检测到的前导序列的索引号、用于上行同步的时间调整信息、初始的上行资源分配(用于发送随后的消息3)，以及一个临时小区无线网络临时标识(TC-RNTI，Temporary Cell Radio Network Tempory Identity)，此TC-RNTI将在步骤(4)(冲突解决)中决定是否转 换为永久的C-RNTI。UE需要在物理下行控制信道(PDCCH，Physical Downlink Control Channel)上使用随机接入无线网络临时标识随机接入RNTI(RA-RNTI，Random Access RNTI)来监听RAR消息。
RA-RNTI＝1+t_id+10*f_id，
其中，t_id指发送前导的物理随机接入信道(PRACH，Physical Random Access Channel)的第一个子帧(subframe)索引号(0<＝t_id<10)，
f_id为这个subframe里的PRACH索引，也就是频域位置索引，(0＝<f_id<＝6)，不过对于频分双工(FDD，Frequency Division Duplexing)系统来说，只有一个频域位置，因此f_id永远为零。
(3)UE发送消息3。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需要通过随后的消息3和消息4消息，来解决这样的随机接入冲突。
(4)eNB发送消息4，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返回的消息4，并且其中携带的UE标识(ID)与自己在消息3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消息中得到的临时C-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。
未来巨量机器设备通信要求：随机接入并发传输阻塞率<0.1％，每平米在1s～10s内的接入密度不小于10个UE。那么在一个微小区内，1s～10s内至少接入好几万个用户。为了满足该需求，按照相关技术中随机接入的方式，即使在UE均匀接入，并且每个子帧都可以发起随机接入的情况下，也 至少需要上百倍的物理随机接入信道资源。但在实际情况下UE并非均匀接入，因此，需要的资源数可能更多。在现有的LTE系统中，对于一个20兆(M)带宽的系统，如果一个时频资源容纳一个preamble根序列的64个循环移位的话，即使全带宽都用来发送PRACH都不够。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本文提供一种随机接入的方法、设备和系统，以节省PRACH资源，满足巨量机器通信的需要。
本发明实施例提供了一种随机接入的方法，所述方法包括：
用户设备UE组内的第一UE在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
所述第一UE和/或所述UE组内的第二UE监听所述eNB发送的所述preamble对应的随机接入响应RAR；其中，所述第一UE为所述UE组内的至少一个UE，所述第二UE为所述UE组中的全部或者部分UE。
可选地，所述第一UE为以下至少一项：
固定的至少一个UE；或者，
按照预设规则确定的至少一个UE；或者，
所述eNB通知的至少一个UE。
可选地，所述preamble和/或所述时域资源和/或频域资源为预设的，或者为由所述UE组的组标识确定的，或者为所述eNB通知的。
可选地，所述第一UE和/或第二UE监听所述eNB发送的所述preamble对应的RAR包括：
所述第一UE和/或第二UE根据预设的或所述preamble对应的无线网络临时标识RA-RNTI对调度所述RAR的下行控制信息DCI的循环冗余校验码CRC进行解扰，并接收所述RAR；所述RAR包括至少一个临时小区无线网 络临时标识TC-RNTI和/或至少一个上行授权；
所述第一UE和/或第二UE根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权，确定分配给自身的TC-RNTI和/或上行授权。
可选地，所述第一UE和/或第二UE根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权，确定分配给自身的TC-RNTI和/或上行授权包括：
所述第一UE和/或第二UE根据自身的标识按照预设的规则确定分配给自身的TC-RNTI和/或上行授权。
可选地，所述第一UE和/或第二UE监听所述eNB发送的所述preamble对应的RAR包括：
所述第一UE和/或第二UE根据各自的标识和/或preamble确定各自对应的RA-RNTI，并根据所述各自对应的RA-RNTI对调度所述RAR的DCI的CRC进行解扰，并接收自身对应的RAR，所述RAR中包含分配给对应的所述第一UE或第二UE的一个TC-RNTI和/或一个上行授权。
可选地，所述第一UE和/或第二UE监听所述eNB发送的所述preamble对应的RAR之后，所述方法还包括：
所述第一UE和/或第二UE根据分配给自身的上行授权发送消息3。
可选地，所述第一UE和/或第二UE根据分配给自己的上行授权发送消息3之后，所述方法还包括：
所述第一UE和/或第二UE接收所述eNB发送的消息4。
可选地，所述第一UE和/或第二UE接收eNB发送的消息4包括：
调度所述消息4的DCI的CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，所述消息4包括至少一套无线资源，所述第一UE和/或第二UE分配给自身的无线资源由所述UE根据所述消息4中包括的至少一套无线资源确定。
可选地，所述第一UE和/或第二UE分配给自身的无线资源还由所述UE 根据自身的标识按照预设的规则确定。
可选地，所述消息4包括：
分配给对应的第一UE或第二UE的一套无线资源。
可选地，在所述第一UE和/或第二UE接收eNB发送的消息4之后，所述方法还包括：
所述第一UE和/或第二UE向所述eNB发送用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号。
可选地，所述指示信号为调度请求SR或者确认ACK信号。
可选地，在所述第一UE和/或第二UE接收eNB发送的消息4之后，所述方法还包括：
所述第一UE和/或第二UE接收所述eNB发送的用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
可选地，在所述UE组内的第一UE在一个时频资源上发送一个preamble之前，所述方法还包括：
所述第一UE和/或第二UE接收由所述eNB发送的DCI或者寻呼消息或无线资源控制RRC消息；
或者，所述第一UE接收由所述第二UE发送的随机接入请求信息。
可选地，所述第一UE和/或第二UE接收由eNB发送的DCI或者寻呼消息或RRC消息包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
可选地，所述第一UE接收到所述第二UE发送的随机接入请求信息之后，所述方法还包括：
所述第一UE对所接收到的组内第二UE的随机接入请求进行计数；
当计数达到预设阈值时，所述第一UE在一个时频资源上发送一个preamble。
可选地，所述UE组内的第一UE在一个时频资源上发送一个preamble包括：
所述第一UE周期地在一个频域资源上发送一个preamble。
可选地，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
可选地，所述消息3中包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数或者一个预设的UE数。
可选地，所述preamble和/或时域资源和/或频域资源与所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数或者一个预设的UE数对应。
本发明实施例还提供了一种随机接入的方法，所述方法包括：
演进基站eNB接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；其中，所述时频资源包括时域资源和频域资源，所述第一UE为所述UE组内的至少一个UE；
所述eNB发送所述preamble对应的随机接入响应RAR。
可选地，所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；所述RAR用于所述第一UE和/或第二UE根据自身的标识按照预设的分配规则从所述至少一个TC-RNTI和/或上行授权中确定分配给自身的TC-RNTI和/或上行授权，所述第二UE为所述UE组中的全部或者部分UE。
可选地，所述RAR包括分配给对应的所述第一UE和/或第二UE的一个TC-RNTI和/或一个上行授权，所述第二UE为所述UE组中的全部或者部分UE。
可选地，在所述eNB发送所述preamble对应的RAR之后，所述方法还包括：
所述eNB接收由所述第一UE和/或第二UE根据分配给自身的上行授权所发送的消息3。
可选地，在所述eNB接收由所述第一UE和/或第二UE根据分配给自己的上行授权所发送的消息3之后，所述方法还包括：
所述eNB向所述第一UE和/或第二UE发送消息4。
可选地，所述eNB向所述第一UE和/或第二UE发送消息4包括：调度所述消息4的下行控制信息DCI的循环冗余校验码CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，所述消息4包括至少一套无线资源，所述第一UE和/或第二UE分配给自身的无线资源由所述第一UE和/或第二UE根据所述消息4中包括的至少一套无线资源确定。
可选地，所述消息4包括：
分配给对应的第一UE或第二UE的一套无线资源。
可选地，在所述eNB向所述第一UE和/或第二UE发送消息4之后，所述方法还包括：
所述eNB接收由所述第一UE和/或第二UE发送的用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；所述指示信号为调度请求SR或者确认ACK信号。
可选地，在所述eNB向所述第一UE和/或第二UE发送消息4之后，所述方法还包括：
所述eNB向所述第一UE和/或第二UE发送用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
可选地，所述eNB接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble之前，所述方法还包括：
所述eNB向所述第一UE和/或第二UE发送DCI或者寻呼消息或无线资 源控制RRC消息。
可选地，所述eNB向所述第一UE和/或第二UE发送DCI或者寻呼消息或RRC消息包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
可选地，所述eNB接收所述UE组内的第一UE在一个时频资源上发送的前导preamble包括：
所述eNB周期性地在一个频域资源上接收所述第一UE发送的一个preamble。
可选地，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
可选地，所述消息3中包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数。
本发明实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述随机接入的方法。
本发明实施例还提供了一种用户设备UE，所述UE包括：发送单元和监听单元；其中，
所述发送单元设置为：在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
所述监听单元设置为：监听所述eNB发送的所述preamble对应的随机接入响应RAR。
可选地，所述监听单元包括：第一解扰子单元、第一接收子单元和分配子单元，其中，
所述第一解扰子单元设置为：根据预设的或所述preamble对应的无线网络临时标识RA-RNTI对调度所述RAR的下行控制信息DCI的循环冗余校验码CRC进行解扰；
所述第一接收子单元设置为：接收所述RAR；所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；
所述分配子单元设置为：根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权中确定分配给所述UE自身的TC-RNTI和/或上行授权。
可选地，所述分配子单元是设置为：根据所述UE自身的标识按照预设的规则确定分配给所述UE自身的TC-RNTI和/或上行授权。
可选地，所述监听单元包括：确定子单元、第二解扰子单元和第二接收子单元，其中，
所述确定子单元设置为：根据所述UE各自的标识和/或preamble确定所述UE各自对应的RA-RNTI；
所述第二解扰子单元设置为：根据所述UE各自对应的RA-RNTI对调度所述RAR的DCI的CRC进行解扰；
所述第二接收子单元设置为：接收所述UE自身对应的RAR，所述RAR中包含分配给所述UE对应的一个TC-RNTI和/或一个上行授权。
可选地，所述发送单元还设置为：根据分配给所述UE自身的上行授权发送消息3。
可选地，所述UE还包括接收单元，其设置为：接收所述eNB发送的消息4。
可选地，所述接收所述eNB发送的消息4包括：
调度所述消息4的DCI的CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，所述消息4包括用于所述UE确定分配给自身的无线资源的至 少一套无线资源。
可选地，所述消息4包括：
分配给对应的所述UE的一套无线资源。
可选地，所述发送单元还设置为：向所述eNB发送用于向所述eNB通知所述UE接入成功的指示信号。
可选地，所述指示信号为调度请求SR或者确认ACK信号。
可选地，所述接收单元还设置为：接收所述eNB发送的用于指示所述UE重新发起随机接入的指示信息。
可选地，所述接收单元还设置为：接收由所述eNB发送的DCI或者寻呼消息或无线资源控制RRC消息；或者，接收由所述第二UE发送的随机接入请求信息。
可选地，所述接收由所述eNB发送的DCI或者寻呼消息或RRC消息包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
可选地，所述发送单元是设置为：周期地在一个频域资源上发送一个preamble。
可选地，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
可选地，所述消息3中包含UE组内的有随机接入请求的UE的个数或者UE组包含的UE数或者一个预设的UE数。
可选地，所述preamble和/或时域资源和/或频域资源与UE组内的有随机接入请求的UE的个数或者UE组包含的UE数或者一个预设的UE数对应。
本发明实施例还提供了一种演进基站eNB，所述eNB包括：接收单元和发送单元，其中，
所述接收单元设置为：接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；其中，所述时频资源包括时域资源和频域资源，所述第一UE为所述UE组内的至少一个UE；
所述发送单元设置为：发送所述preamble对应的随机接入响应RAR。
可选地，所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；所述RAR用于所述第一UE和/或第二UE根据自身的标识按照预设的规则从所述至少一个TC-RNTI和/或上行授权中确定分配给自身的TC-RNTI和/或上行授权，所述第二UE为所述UE组中的全部或者部分UE。
可选地，所述RAR包括分配给对应的所述第一UE和/或第二UE的一个TC-RNTI和/或一个上行授权，所述第二UE为所述UE组中的全部或者部分UE。
可选地，所述接收单元还设置为：接收由所述第一UE和/或第二UE根据分配给自身的上行授权所发送的消息3。
可选地，所述发送单元还设置为：向所述第一UE和/或第二UE发送消息4。
可选地，所述向所述第一UE和/或第二UE发送消息4包括：调度所述消息4的下行控制信息DCI的循环冗余校验码CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，所述消息4包括用于所述第一UE和/或第二UE确定分配给自身的无线资源的至少一套无线资源。
可选地，所述消息4包括：
分配给对应的第一UE或第二UE的一套无线资源。
可选地，所述接收单元还设置为：接收由所述第一UE和/或第二UE发 送的用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；所述指示信号为调度请求SR或者确认ACK信号。
可选地，所述发送单元还设置为：向所述第一UE和/或第二UE发送用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
可选地，所述发送单元还设置为：向所述第一UE和/或第二UE发送DCI或者寻呼消息或无线资源控制RRC消息。
可选地，所述向所述第一UE和/或第二UE发送DCI或者寻呼消息或RRC消息包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
可选地，所述接收单元是设置为：周期性地在一个频域资源上接收所述第一UE发送的一个preamble。
可选地，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
可选地，所述消息3中包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数。
本发明实施例还提供了一种随机接入的系统，所述系统包括用户设备UE和演进基站eNB；其中，
用户设备UE组内的第一UE设置为：在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
所述第一UE和/或所述UE组内的第二UE设置为：监听所述eNB发送 的所述preamble对应的随机接入响应RAR；其中，所述第一UE为所述UE组内的至少一个UE，所述第二UE为所述UE组中的全部或者部分UE；
所述eNB设置为：接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；
以及，发送所述preamble对应的RAR。
本发明实施例所提供的一种随机接入的方法、设备和系统，用户设备UE组内的一个或多个UE在一个时频资源上向演进基站eNB发送一个前导preamble，以指示eNB执行UE组内部分或全部UE的随机接入处理。如此，一组UE在一次随机接入中只需要占用一个PRACH资源(包括时域资源、频域资源和preamble)，这样，可以大大节省PRACH资源，满足巨量机器通信的需要。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为本发明实施例提供的一种随机接入的方法流程示意图；
图2为本发明实施例提供的另一种随机接入的方法流程示意图；
图3为本发明实施例提供的一种基于非竞争的随机接入的方法示意图；
图4为本发明实施例提供的一种由eNB发送寻呼消息来触发一个UE组接入的方法示意图；
图5为本发明实施例提供的一种UE的结构示意图；
图6为本发明实施例提供的另一种UE的结构示意图；
图7为本发明实施例提供的又一种UE的结构示意图；
图8为本发明实施例提供的一种eNB的结构示意图。
本发明的较佳实施方式
下面结合附图对本发明的实施方式进行描述。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各种方式可以相互组合。
实施例一
参见图1，其示出了本发明实施例提供的一种随机接入的方法流程，该方法可以应用于用户设备UE侧，该方法可以包括：
S101：用户设备UE组内的第一UE在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
S102：第一UE和/或UE组内的第二UE监听eNB发送的preamble对应的随机接入响应RAR；
其中，第一UE可以为所述UE组内的至少一个UE，第一UE能够作为该UE组的代表；而第二UE可以为所述UE组中的全部或者部分UE，也就是具有随机接入请求的UE，因此，第二UE中可以包括第一UE。
需要说明的是，第一UE可以是以下至少一项：
固定的至少一个UE；或者，
按照预设规则确定的至少一个UE；或者，
所述eNB通知的至少一个UE。
而且所述preamble和/或所述时域资源和/或频域资源可以为预设的，或者可以为由该UE组的组标识确定的，或者可以为eNB通知的。
可选地，第一UE和/或UE组内的第二UE监听eNB发送的preamble对应的RAR可以包括：
所述第一UE和/或第二UE根据预设的或所述preamble对应的无线网络临时标识RA-RNTI对调度所述RAR的下行控制信息(DCI，Downlink Control Information)的循环冗余校验码(CRC，Cyclic Redundancy Check)进行解扰，并接收所述RAR；其中，所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；以及，
所述第一UE和/或第二UE根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权，确定分配给自身的TC-RNTI和/或上行授权；可选地，所述第一UE和/或第二UE可以根据自身的标识按照预设的规则确定分配给自身的TC-RNTI和/或上行授权。
可选地，第一UE和/或UE组内的第二UE监听eNB发送的preamble对应的RAR可以包括：
所述第一UE和/或第二UE根据各自的标识和/或preamble确定各自对应的RA-RNTI，并根据所述各自对应的RA-RNTI对调度所述RAR的DCI的CRC进行解扰，并接收自身对应的RAR，所述RAR中包含分配给对应的所述第一UE或第二UE的一个TC-RNTI和/或一个上行授权。
示例性地，第一UE和/或第二UE监听eNB发送的preamble对应的RAR之后，该方法还可以包括：
第一UE和/或第二UE根据分配给自身的上行授权发送消息3。
可选地，第一UE和/或第二UE根据分配给自身的上行授权发送消息3之后，该方法还可以包括：
第一UE和/或第二UE接收所述eNB发送的消息4。
需要说明的是，第一UE和/或第二UE接收eNB发送的消息4可包括：调度所述消息4的DCI的CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，该消息4可以包括至少一套无线资源，所述第一UE和/或第二UE可以根据所述消息4中包括的至少一套无线资源确定分配给自身的无线资源；可选地，所述UE还可以根据自身的标识按照预设的规则从消息4中确定分配给自身的无线资源。
可选地，该消息4也可以包括分配给对应的第一UE或第二UE的一套无线资源。
可选地，在第一UE和/或第二UE接收eNB发送的消息4之后，该方法还可以包括：
第一UE和/或第二UE向所述eNB发送用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；其中，所述指示信号可以为调度请求SR或者确认ACK信号。
可选地，在第一UE和/或第二UE接收eNB发送的消息4之后，该方法还可以包括：
第一UE和/或第二UE接收所述eNB发送的用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
示例性地，在所述UE组内的第一UE在一个时频资源上发送一个preamble之前，该方法还可以包括：
所述第一UE和/或第二UE接收由所述eNB发送的DCI或者寻呼消息或无线资源控制RRC消息；
或者，所述第一UE接收由所述第二UE发送的随机接入请求信息。
可选地，第一UE和/或第二UE接收由所述eNB发送的DCI或者寻呼消息或RRC消息可包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
可选地，所述第一UE接收到所述第二UE发送的随机接入请求信息之后，该方法还可以包括：
所述第一UE对所接收到的组内第二UE的随机接入请求进行计数；
当计数达到预设阈值时，所述第一UE在一个时频资源上发送一个preamble。
示例性地，所述UE组内的第一UE在一个时频资源上发送一个preamble可以包括：
第一UE周期地在一个频域资源上发送一个preamble。
需要说明的是，所述消息3和消息4中可包含所述UE组的组标识或者一个预设字段。
并且，所述消息3中可包含所述UE组内的有随机接入请求的UE的个数 或者所述UE组包含的UE数或者一个预设的UE数。
可选地，所述preamble和/或时域资源和/或频域资源可以与所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数或者一个预设的UE数对应。
本实施例提供了一种随机接入的方法，用户设备UE组内的第一UE在一个时频资源上向演进基站eNB发送前导preamble，随后第一UE和/或UE组内的第二UE监听eNB发送的preamble对应的随机接入响应RAR，并完成上行授权和资源分配，从而一组UE在一次随机接入中只需要占用一个PRACH资源(包括时域资源、频域资源和preamble)，这样，可以大大节省PRACH资源，满足巨量机器通信的需要。
实施例二
参见图2，其示出了本发明实施例提供的一种随机接入的方法流程，该方法可以应用于eNB侧，该方法可以包括：
S201：eNB接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble，所述时频资源包括时域资源和频域资源；
S202：eNB发送preamble对应的随机接入响应RAR。
可选地，该RAR可以包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；该RAR可以用于所述第一UE和/或第二UE根据自身的标识按照预设的规则从所述至少一个TC-RNTI和/或上行授权中确定分配给自身的TC-RNTI和/或上行授权。
可选地，该RAR可包括分配给对应的所述第一UE和/或第二UE的一个TC-RNTI和/或一个上行授权。
需要说明的是，上述S201至S202中所述的第一UE可以为所述UE组内的至少一个UE，第一UE能够作为该UE组的代表；而第二UE可以为所述UE组中的全部或者部分UE，也就是具有随机接入请求的UE，因此，第二UE中可以包括第一UE。
可选地，在eNB发送preamble对应的RAR之后，该方法还可以包括：
eNB接收由所述第一UE和/或第二UE根据分配给自身的上行授权所发 送的消息3。
而且，在eNB接收由所述第一UE和/或第二UE根据分配给自己的上行授权所发送的消息3之后，该方法还可以包括：
eNB向所述第一UE和/或第二UE发送消息4。
需要说明的是，所述eNB向所述第一UE和/或第二UE发送消息4可以包括：调度所述消息4的下行控制信息DCI的循环冗余校验码CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，该消息4可以包括至少一套无线资源，所述第一UE和/或第二UE可以根据所述消息4中包括的至少一套无线资源确定分配给自身的无线资源。
且/或，该消息4也可以包括分配给对应的第一UE或第二UE的一套无线资源。
可选地，在eNB向所述第一UE和/或第二UE发送消息4之后，该方法还可以包括：
eNB接收由所述第一UE和/或第二UE发送的用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；其中，所述指示信号为调度请求SR或者确认ACK信号。
或者，在eNB向所述第一UE和/或第二UE发送消息4之后，该方法还可以包括：
eNB向所述第一UE和/或第二UE发送用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
示例性地，eNB接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble之前，该方法还可以包括：
eNB向所述第一UE和/或第二UE发送DCI或者寻呼消息或无线资源控制RRC消息。
可选地，所述eNB向所述第一UE和/或第二UE发送DCI或者寻呼消息或RRC消息可以包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
可选地，eNB接收所述UE组内的第一UE在一个时频资源上发送的前导preamble可包括：
eNB周期性地在一个频域资源上接收所述第一UE发送的一个preamble。
需要说明的是，消息3和消息4中可包含所述UE组的组标识或者一个预设字段。
并且，所述消息3中可包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数。
本实施例提供了一种随机接入的方法，eNB接收UE组内的第一UE在一个时频资源上发送的前导preamble之后，发送所述preamble对应的随机接入响应RAR，使得UE完成上行授权和资源分配，从而实现了一组UE在一次随机接入中只需要占用一个PRACH资源(包括时域资源、频域资源和preamble)，这样，可以大大节省PRACH资源，满足巨量机器通信的需要。
实施例三
基于上述两个实施例相同的技术构思，本实施例通过以下四个具体的示例来对上述两个实施例的技术方案进行详细介绍，需要说明的是，以下四个示例仅用于对本发明实施例的技术方案进行说明，本领域技术人员可以无需创造性劳动地将这四个具体示例的技术方案按照需要进行组合，本发明实施例对此不做赘述。
在以下示例中，多个(两个及两个以上)UE形成一个UE组，一组UE 有一个组ID作为组标识，每个UE有自己的组内ID号，即自身的标识信息。组的形成方式可以为以下方式之一：
①对于运营商安装的固定UE或者相对位置接近且固定、并且业务相同的UE(例如车载、火车地铁的同节车厢)，由运营商在操作管理维护(OAM，Operation Administration and Maintenance)后台配置这些UE为一组；
②网络侧检测所有已连接(connected)状态的终端的时间提前量(TA，Time Advance)值，如果某些终端的TA值在一段时间内始终保持相同，则将这些终端配置为一组；
③采用定位系统，将一部分定位距离较近的UE配置为一组。
④在UE之间可以通信的情况下，例如，利用设备到设备(D2D，Device to Device)中的发现技术，UE自发形成一组。UE自发形成一组，类似相关技术中的D2D技术中的“发现”。(只能用于组内UE可以通信的情况。)
示例一
示例一给出一种基于非竞争的随机接入的方法，参见图3，该示例包括以下步骤：
步骤301：UE处于连接状态时，eNB为UE组分配一个组标识或者组ID，即组无线网络临时标识(RNTI，Radio Network Temporary Identifier)。
步骤302：eNB通知UE组完成上行同步；
eNB通知该组UE进行随机接入，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。
所述物理层信令可以是一个DCI，所述DCI的循环冗余校验(CRC，Cyclic Redundancy Check)码采用所述组RNTI进行加扰或者加掩码；所述加扰或者加掩码的方式可以采用按比特位做异或的方式，例如，组RNTI为16位，CRC也为16位，两者对应位置的比特(bit)之间做异或，又例如，组RNTI为“0000110100001111”，CRC为“1111001111110011”，那么用该组RNTI对该CRC加扰之后得到“1111111011111100”。相应地，接收到所述加扰后的CRC的UE将加扰后的CRC再和组RNTI按位做异或，就可以得到加扰前的CRC 了；
所述高层信令也可以是无线资源控制(RRC，Radio Resource Control)消息，所述高层信令可以是发送给所述UE组的公共信息，也可以是发送给一个UE的RRC消息，所述RRC消息用于通知UE组接入，比如，可以在所述RRC消息中通过一个bit指示来通知所述UE组接入。
可选地，所述通知信令(DCI或RRC消息)可以只包含preamble相关信息，比如，可包含一个preamble的索引信息，这样，接收到所述通知信令之后，可以根据所述preamble相关信息确定待发送的preamble，而发送所述preamble的时频资源可以是预设的，如，UE组预先设置的一个固定的时频资源、或者UE组与eNB之间事先约定的一个时频资源；或者，所述通知信令还可以包含一个时域资源信息，即，发送子帧信息，用于指示UE组中的UE在所述子帧上发送所述preamble，这样，接收到所述通知信令之后，发送所述preamble的频域信息可以是预设的，如，UE组预先设置的一个固定的频域资源、或者UE组与eNB之间事先约定的一个频域资源；或者，所述通知信令可包含preamble相关信息和一个频域资源信息，这样，接收到所述通知信令之后，发送所述preamble的子帧信息可以为预设的，如，UE组预先设置的一个固定的时域资源、或者UE组与eNB之间事先约定的一个时域资源；或者，所述通知信令可以包含preamble相关信息和时频资源信息(包括时域资源信息和频域资源信息，所述时域资源信息即为子帧信息)；或者，所述通知信令可以不包括preamble相关信息、时域资源信息和频域资源信息，收到所述通知信令的UE组中的一个或多个UE可以直接将与eNB约定的preamble通过事先约定的时频资源发送给eNB。
步骤303：所述UE组中的一个或者多个UE代表组内的UE向eNB发送preamble。
所述UE组中的UE收到上述通知信令之后，在相应的(eNB通知的、或预先设置或约定的)时频资源上发送相应的(eNB通知的、或预先设置或约定的)preamble；
可选地，发送preamble的UE即为第一UE，可以是以下之一：
①固定的一个或者多个UE；
例如，预先指定编号为0的UE发送preamble，或者预先指定在UE组中编号为偶数的UE发送preamble，或者也可以指定所有UE发送preamble。
②按照预设规则确定的某个或者部分UE；
比如，根据发送preamble的UE的编号和收到物理层信令或者高层信令的子帧的子帧号来确定发送preamble的UE；例如，如果收到物理层信令或者高层信令的是奇数子帧则编号为奇数的UE发送preamble，收到物理层信令或者高层信令的是偶数子帧则编号为偶数的UE发送preamble。
③所述eNB发送的通知信令中指定的一个或者多个UE；
这种情况下，所述物理层信令或者高层信令中还需要包含发起随机接入的UE的编号信息。
在所述UE发送了preamble之后，所有的UE监听RAR，调度所述RAR的PDCCH的CRC是用RA-RNTI加扰或者加掩码的，所述RA-RNTI可以是预设的，比如和preamble的发送时刻和发送的频域资源(在FDD中，就只是发送时刻)是绑定的：
RA-RNTI＝1+t_id+10*f_id
当时频资源固定时，RA-RNTI也就固定了。这种情况下，所有UE可以监听所述RA-RNTI加扰的PDCCH，获得RAR。
或者，所述时频资源可能不固定，比如固定了频域资源，但时域资源可能不固定，这种情况只可能出现在规定发送preamble的UE为一个的情况下，此时，发送preamble的UE可以监听所述发送的时频资源以计算得到RA-RNTI加扰的PDCCH，其余UE可以需要监听所有可能的时频资源以计算得到RA-RNTI加扰的PDCCH多个。
UE监听到RA-RNTI加扰的PDCCH之后，可接收其调度的物理下行共享信道(PDSCH，Physical Downlink Shared Channel)，进而获得TA信息。
相关技术中的随机接入是由每个UE各自独立完成的，而在本示例中，一组UE在一次随机接入中只占用了一个PRACH资源(包括时域资源、频域资源和preamble)，这样，可以大大节省PRACH资源。
示例二
示例二提供了一种由eNB发送寻呼消息来触发一个UE组接入的方法，参见图4，该示例包括以下步骤：
步骤401：eNB向UE组发送寻呼消息；
可选地，所述寻呼消息可以用于唤醒所述UE组中全部或者部分在idle态的UE进行随机接入。
所述寻呼消息可包括以下至少之一：
①组ID，所述组ID可以包含在寻呼消息中，也可以采用组ID对调度寻呼消息的PDCCH的CRC进行加扰。
②发起随机接入的UE的编号，即UE-ID。
③Preamble ID，或者，Preamble ID也可以不通知，即为预设的。
④时域和/或频域资源，或者，时域和/或频域资源也可以不通知，为预设的，或者可以时域资源是预设的，频域资源是通知的，或者可以频域资源是预设的，时域资源是通知的。
⑤组内的某些UE的编号(UE-ID)，可以在只唤醒其中的某些UE进行随机接入时才包含这个信息。
当上述寻呼消息中不包括发起随机接入的UE的编号，即UE-ID时，可以按照以下方式确定发起随机接入的UE：
a、指定UE组内的一个或者多个UE发起随机接入，比如预定义编号为0的UE发送preamble，或者预定义编号为偶数的UE发送preamble，或者所有UE发送preamble。
b、按照某种规则确定的一个或者多个UE发起随机接入，比如可以按照发送preamble的UE的编号与收到所述物理层信令或者高层信令的子帧的对应关系，确定发起随机接入的一个或多个UE；比如，如果接受到的是奇数子帧则编号为奇数的UE发送preamble，是偶数子帧则编号为偶数的UE发送preamble；
需要说明的是，通过上述方式所确定的发起随机接入的一个或多个UE可以和eNB要求唤醒的UE相同或不同，这种不同可包括：部分不同或全部不同。
步骤402：UE组内的UE收到寻呼消息后，执行随机接入；
具体地，可以通过以下三种方式实现随机接入：
方式1：
步骤1：所述发起随机接入的一个或者多个UE在所述时频资源上发送preamble。
步骤2：eNB接收到preamble之后，发送一个RAR，RAR中携带TA以及以下信息至少之一：
①TC-RNTI信息；
可选地，所述TC-RNTI信息可以包括M个TC-RNTI，其中，M为组内UE的个数、或者为需要唤醒的UE的个数、或者为一个预设值；所述M个TC-RNTI可以为绝对值的形式，即16bit的C-RNTI、或者可以为一个C-RNTI的绝对值和M-1个C-RNTI相对所述绝对值的相对值，组内需要被唤醒的所有UE或者部分UE可以按照预设的规则分别对应不同的TC-RNTI，比如，按照UE-ID从小到大的顺序对应、或者随机对应；或者，
所述TC-RNTI信息可以为一个TC-RNTI，组内所有UE或者部分UE可以按照预设的规则分别对应TC-RNTI、TC-RNTI+1、所述TC-RNTI+2、…、TC-RNTI+M-1，比如按照UE-ID从小到大的顺序对应，或者随机对应。
②上行授权(UL grant，UpLink grant)信息；
比如，所述UL grant信息可以为M个独立的UL grant信息，或者可以为包含M个调度信息的一个UL grant信息；组内全部UE或者部分UE可以按照预设的规则分别对应不同的UL grant信息；比如，按照UE-ID从小到大的顺序对应，或者随机对应；或者，
所述UL grant信息可以为一个UL grant，组内需要被唤醒的全部UE或者部分UE可以按照预设的规则分别对应分配给自己的UL grant；比如，假设所述UL grant中的资源分配为物理资源承载(PRB，Physical Resource Bearer)#0～3，则每个UE可以根据自己的编号确定分配给所述UE的资源，比如UE#1对应PRB#4～7，或者随机对应，其余UE信息，如调制编码策略(MCS，Modulation and Coding Scheme)等可以与UL grant中的相同。
或者，在步骤2中，eNB也可以发送M个RAR。
其中，每个RAR可以采用不同的RA-RNTI加扰。UE可以根据自身的编号(UE-ID)和预设的规则确定一个RA-RNTI去解扰DCI的CRC，并接收相应的RAR。比如UE-ID为UE#0的UE的RA-RNTI可以是根据发送preamble的时频资源确定的，UE#1、UE#2直到UE#n分别依次对应RA-RNTI+1、RA-RNTI+2直到RA-RNTI+n；或者，不同编号的UE也可以对应RA-RNTI+1、RA-RNTI+2、…、RA-RNTI+n中的任意一个。
步骤3：组内全部UE或者部分UE(所述全部或部分UE是指eNB要求唤醒的全部或部分UE)分别在自身的UL grant对应的资源上发送消息(Msg，Message)3。
步骤4：针对步骤3中发送的Msg 3，eNB分别发送Msg 4。
需要说明的是，该方式中RAR的接收比较重要，为了避免UE漏检RAR，可以在一个窗口内重新发送RAR。
对于某些UE未成功接收RAR的情况，eNB可以重新发送呼叫消息通知这些UE进行接入。
方式2：
步骤1：所述发起随机接入的一个或者多个UE在所述时频资源上发送preamble。
步骤2：eNB接收到preamble之后，发送RAR，RAR中携带一个TA信息、一个TC-RNTI和一个UL grant。
步骤3：组内全部UE或者部分UE(所述全部或部分UE是指eNB要求唤醒的全部或部分UE)监听RAR，得到TA和TC-RNTI。
步骤4：一个或者多个UE发送Msg 3，这里的一个或多个UE可以是在步骤1中发送preamble的所述一个或者多个UE或者所述多个UE中的一个预设UE(比如UE ID最小的一个)，所发送的Msg 3携带一个组ID或者一个预设值，所述预设值可以是组内UE共知的。
步骤5：eNB发送Msg 4，携带组ID，Msg 4是用所述TC-RNTI加扰的，所述Msg 4中还可以包括M-1个C-RNTI，或者也可以不包括。对于Msg 4 中包括M-1个C-RNTI的情况，组内全部UE或者部分UE(所述全部或部分UE是指eNB要求唤醒的全部或部分UE)可以根据自己的组内编号选择一个TC-RNTI作为自己的C-RNTI，比如编号为UE#5的UE，对应第5个TC-RNTI；或者，UE也可以随机选择一个TC-RNTI作为自己的C-RNTI；对于Msg 4中不包含TC-RNTI的情况，组内全部UE或者部分UE可以根据自己的组内编号按照预设的公式计算一个C-RNTI作为自己的C-RNTI，比如编号为UE#5则可以将对调度Msg 4的DCI的CRC进行加扰的TC-RNTI加5，得到自己的C-RNTI；或者，UE也可以在所述TC-RNTI到所述TC-RNTI+M-1之间随机选择一个作为自己的C-RNTI。可选地，所述Msg 4中还可以包括一个或者M个无线资源配置信息，如CQI反馈资源、SR资源等。对于Msg 4中包括M个无线资源配置信息的情况，组内所有UE或者某些UE可以根据自己的组内编号选择一套无线资源配置信息作为自己的无线资源配置，这里的选择方式可以与上述TC-RNTI的选择方式类似。对于Msg 4中包括1个无线资源配置信息的情况，组内全部UE或者部分UE可以根据自己的组内编号按照预设的公式得到自己的无线资源配置，比如无线资源配置中包括SR配置，则编号为#5的UE可以认为自己的SR配置为无线资源配置中包括的SR配置+5；或者，也可以采用随机选择的方式确定不同UE对应的SR配置。
该方式中RAR和Msg 4的接收比较重要，为了避免UE漏检RAR和Msg 4，可以分别在一个窗口内将RAR和Msg 4重复发送。
方式3
步骤1：所述一个或者多个UE在所述时频资源上发送preamble。
步骤2：eNB发送RAR，RAR中携带一个TA信息、M个TC-RNTI和一个UL grant。
组内所有UE或者某些UE(只唤醒其中的某些UE进行随机接入时)可以监听RAR，得到TA和TC-RNTI。
在第一步中发送preamble的所述一个或者多个UE或者所述多个UE中的一个预设UE(比如UE ID最小的一个)可以发送Msg 3，携带组ID或者一个预设值。
步骤3：eNB发送Msg 4，Msg 4中携带组ID或者所述预设值，UE监听Msg 4。
可选地，eNB可以发送一个Msg 4，所述Msg 4可以是用Msg 3中的TC-RNTI加扰得到的，并包含一套或者M套无线资源(也可以继续携带多个TC-RNTI)。UE可以按照方式2中类似的方式确定分配给自己的C-RNTI和无线资源；或者，
eNB可以发送多个Msg 4，所述多个Msg 4分别用M个TC-RNTI加扰，UE可以根据自身的编号或者随机选择一个TC-RNTI，接收所述TC-RNTI加扰DCI调度的Msg 4。
对于某些UE未成功接收RAR的情况，eNB可以重新寻呼这些UE进行接入。
示例三
示例三给出一种一组UE竞争接入的方法，该示例包括以下步骤：
步骤501：UE组内的一个或多个UE周期性地在一个时频域资源上向eNB发送preamble，从而向eNB发起随机接入；所述发送preamble的UE可以是以下之一：
①固定的一个或者多个UE；
例如，可以预先指定编号为0的UE发送preamble，或者可以预先指定在UE组中编号为偶数的UE发送preamble，或者也可以指定所有UE发送preamble。
②按照预设规则确定的某个或者部分UE；
比如，根据发送preamble的UE的编号和收到的物理层信令或者高层信令的子帧的子帧号来确定发送preamble的UE；例如，如果收到的是奇数子帧则编号为奇数的UE发送preamble，收到的是偶数子帧则编号为偶数的UE发送preamble。
发送周期和发送preamble的子帧的偏置(offset)可以根据实际需要预先进行设置，设置后的发送周期和发送preamble的子帧的offset可以是组内所有UE共知的。
发起随机接入时可能存在两种情况：一种情况是组内UE业务相同，每次接入均为全组都要接入；另一种情况是组内每次接入只有部分UE需要接入。后一种情况接入的UE数可以是随机的。
可选地，可以通过以下三种方式实现随机接入：
方式1：
步骤1：所述发起随机接入的一个或者多个UE在预设的时频资源上发送预设的preamble。所述preamble资源与组ID有对应关系。
步骤2：eNB接收到所述preamble之后，eNB通过UE发送的PRACH资源(时频资源信息或者preamble信息)获知所述UE是代表一组UE接入；之后，eNB发送一个RAR，RAR中携带TA以及以下信息至少之一：
①TC-RNTI信息；
可选地，所述TC-RNTI信息可以包括M个TC-RNTI，其中，M为组内UE的个数，或者为需要发起随机接入的UE的个数，或者为一个预设值；这一步骤之前，UE发送的preamble以及用于发送的preamble的时频资源和该UE组存在一一对应关系，且eNB事先知道所述UE组的信息，如UE组中UE的个数，那么eNB可以通过接收到的preamble和时频资源信息确定发起随机接入的UE组，从而确定所述UE组的信息，从而获知该组UE的UE数目M、或者M也可以是一个预设值；另外，UE也可以在发送preamble时同时携带本组UE的数目M、或UE组中需要发起随机接入的UE的数目M、或一个预设值M；所述M个TC-RNTI可以为绝对值的形式，即16bit的C-RNTI；或者可以为一个C-RNTI的绝对值和M-1个C-RNTI相对所述绝对值的相对值。这样，在接收到所述TC-RNTI信息时，UE组内需要发起随机接入的全部UE或者部分UE可以按照预设的规则分别确定自身的TC-RNTI，比如，按照UE-ID从小到大的顺序依次对应不同的TC-RNTI、或者随机对应TC-RNTI；或者，
所述TC-RNTI信息可以为一个TC-RNTI，组内所有UE或者部分UE可以按照预设的规则分别对应TC-RNTI、TC-RNTI+1、TC-RNTI+2、…、TC-RNTI+M-1，比如按照UE-ID从小到大的顺序对应，或者随机对应。
②上行授权(UL grant，UpLink grant)信息；
比如，所述UL grant信息可以为M个独立的UL grant信息，或者可以为包含M个调度信息的一个UL grant信息；组内全部UE或者部分UE可以按照预设的规则分别对应不同的UL grant信息；比如，按照UE-ID从小到大的顺序对应，或者随机对应；或者，
所述UL grant信息可以为一个UL grant，组内需要进行随机接入的全部UE或者部分UE可以按照预设的规则分别对应分配给自己的UL grant；比如，假设所述UL grant中的资源分配为物理资源承载(PRB，Physical Resource Bearer)#0～3，则每个UE可以根据自己的编号确定分配给所述UE的资源，比如UE#1可以对应PRB#4～7，或者可以随机对应，其余UE信息，如调制编码策略(MCS，Modulation and Coding Scheme)等可以与UL grant中的相同。
或者，在步骤2中，eNB也可以发送M个RAR。
其中，每个RAR可以采用不同的RA-RNTI加扰。UE可以根据自身的编号(UE-ID)和预设的规则确定一个RA-RNTI去解扰DCI的CRC，并可以接收相应的RAR。比如UE-ID为UE#0的UE的RA-RNTI是根据发送preamble的时频资源确定的，UE#1、UE#2直到UE#n分别依次对应RA-RNTI+1、RA-RNTI+2直到RA-RNTI+n；或者，不同编号的UE也可以对应RA-RNTI+1，所述RA-RNTI+2，…，RA-RNTI+n中任意一个。
步骤3：所述UE组内全部UE或者部分UE(需要进行随机接入的UE)分别在自身对应的UL grant所对应的资源上发送Msg 3。
步骤4：eNB根据收到的Msg 3，分别发送Msg 4，所述Msg 4的个数可以与所述eNB收到的Msg 3的个数相同。
该方式中RAR的接收比较重要，为了避免UE漏检RAR，可以考虑在一个窗口内将RAR重复发送。
如果接入失败，该组UE可以重新发起接入，或者按照相关技术中的方式接入，即单个UE发起随机接入。
方式2：
步骤1：所述发起随机接入的一个或者多个UE在预设的时频资源上发送预设的preamble。所述preamble资源与组ID有对应关系。
步骤2：eNB接收到所述preamble之后，eNB通过UE发送的PRACH资源(时频资源信息或者preamble信息)获知所述UE是代表一组UE接入；之后，eNB发送一个RAR，RAR中携带TA、TC-RNTI等信息。
步骤3：所述UE组内所有UE或者某些UE(需要进行随机接入的UE)监听RAR，得到TA和TC-RNTI。
步骤4：一个或者多个UE发送Msg 3，这里的一个或多个UE可以是在步骤1中发送preamble的所述一个或者多个UE或者所述多个UE中的一个预设UE(比如UE ID最小的一个)，所发送的Msg 3可以携带一个组ID。
步骤5：eNB发送Msg 4，携带组ID，Msg 4是用所述TC-RNTI加扰的，所述Msg 4中还可以包括M-1个C-RNTI，或者也可以不包括。可选地，所述Msg 4中还可以包括一个或者M个无线资源配置信息，如CQI反馈资源、SR资源等。UE可以根据与实例二中的方式2相类似的方式来确定分配给自身的C-RNTI以及无线资源配置信息。
该方式中RAR和Msg 4的接收比较重要，为了避免UE漏检RAR和Msg4，可以考虑分别在一个窗口内将RAR和Msg 4重复发送。
方式3：
步骤1：所述一个或者多个UE在预设的时频资源上发送预设的preamble。所述preamble资源与组ID有对应关系。
步骤2：eNB通过UE发送的PRACH资源(时频资源信息或者preamble信息)获知UE是代表一组UE接入；之后，eNB发送RAR，RAR中携带TA、M个TC-RNTI等信息。
步骤3：组内全部UE或者部分UE(所述全部UE或者部分UE是指需要进行随机接入的UE)监听RAR，得到TA和TC-RNTI。
步骤4：在步骤1中发送preamble的所述一个或者多个UE或者所述多个UE中的一个预设UE(比如UE ID最小的一个)发送Msg 3，所述Msg 3携带一个组ID，所述Msg 3采用一个TC-RNTI加扰，所述TC-RNTI可以是 步骤3中获得的TC-RNTI中的第一个TC-RNTI。
步骤5：eNB发送Msg 4，组内全部UE或者部分UE(所述全部UE或者部分UE是指需要进行随机接入的UE)监听Msg 4。Msg 4可以为以下之一：
a、采用Msg 3中的TC-RNTI加扰得到的一个Msg 4，所述Msg 4中可以携带组ID，还可以包含一套或者M套无线资源，也可以继续携带步骤2中M个TC-RNTI中的多个。可选地，所述Msg 4中还可以包括一个或者M个无线资源配置信息，如CQI反馈资源、SR资源等。接收到所述Msg 4的UE可以采用类似于示例二中方式2中的方式确定分配给自身的C-RNTI以及无线资源配置信息。
b、监听到的Msg 4可以为多个Msg 4，所述多个Msg 4可以分别用M个TC-RNTI加扰，Msg 4中可以携带组ID。Msg 4可以支持混合自动重传(HARQ，Hybrid Automatic Repeat reQuest)，所以，这种情况下，每个UE可以对自身对应的Msg 4进行反馈，发送确认(ACK，Acknowledgement)消息，这样可以避免资源的浪费，在这种情况下，eNB如果没有收到UE发送的ACK，则可以认为这套资源没有UE在使用。
在以上三种方式中，如果UE接入失败，该组UE可以重新发起随机接入，或者，可以按照相关技术中的方式实现相应UE的接入，即，单个UE单独发起随机接入。
进一步地，如果有两个UE选择了相同的无线资源(包括C-RNTI、无线空口资源等)，其发送的上行数据可能总会发生碰撞，导致发送失败。eNB如果发现这些UE总是传输失败，那么可以发送指示信令，令其重新接入。
如果正确接收Msg 4的UE数小于eNB分配的无线资源数，那么就会存在浪费。UE可以发送一个信息来指示其占用了某一套资源，如果对于某一套资源，eNB未收到所述信息，eNB则认为该套资源未被UE占用。比如可以定义一个时间窗，在该时间窗内，UE发送一个指示信息指示其占用了该套资源(TC-RNTI，无线资源)，该指示信息可以是SR、ACK等，如果eNB未收到所述指示信息的话，则eNB认为该套资源是浪费的资源，可以分给其他UE用。
示例四
示例四给出一种一组UE竞争接入的方法。在该示例中，UE组内UE之间可以互相通信，可选地，组内UE之间可以采用比如无线保真(WIFI，Wireless Fidelity)、D2D等短距离通信方式实现交互。
该示例中，当组内成员需要发起随机接入时，先报告给第一UE(下面将第一UE称为组长)，组长可以按照一定的周期进行接入，比如100ms一次，如果100ms内所有的UE都没有随机接入请求，则可以不发起接入；如果有一个或一个以上的UE有随机接入请求，则组长可以发起随机接入；或者，组长可以在累计随机接入请求达到一定数目时发起随机接入。组长可以是预设的，或者固定为某个ID号的UE，比如固定为ID号为0的UE，或者是按照某种规则确定UE组中的一个UE为组长；或者，
业务类型相同的UE可能被划分成一个组，这种情况下，这些UE会在固定的时刻发起随机接入，那么组长可以在固定的时刻代替全组UE发起随机接入。
下面在方式1至方式3中给出组长代表整个组的UE或者部分UE进行随机接入的过程。
方式1：
步骤1：组长在指定的时频资源上发送preamble；
步骤2：eNB通过UE发送的PRACH资源(时频资源信息或者preamble信息)获知UE是组长，发送RAR，RAR中携带TA、TC-RNTI等信息。
步骤3：所述组长发送Msg 3，Msg 3中携带组内的需要进行随机接入的UE个数M；
步骤4：eNB发送Msg 4，Msg 4是用TC-RNTI加扰的，Msg 4中可以包含M-1个C-RNTI值，或者M-1个与TC-RNTI的差分值，或者也可以不包括；可选地，所述Msg 4中还可以包括一套或者M套无线资源配置信息，如CQI反馈资源、SR资源等。
步骤5：组长将这些信息通知给有随机接入需要的UE，可以采用广播的方式进行通知，也可以采用单播的方式进行通知，这里不做限定。
方式2：
步骤1：组长在某个时频资源上发送preamble，该PRACH资源对应需要进行随机接入的UE个数M，或者，eNB已知随机接入的请求数目；
步骤2：eNB通过所述发送preamble的UE发送的PRACH资源(时频资源信息或者preamble信息)获知所述UE是组长，发送RAR，RAR中携带TA、一个TC-RNTI等信息。
步骤3：组长发送Msg 3；
步骤4：eNB发送Msg 4，Msg 4是用TC-RNTI加扰的，Msg 4中可以包含M-1个C-RNTI值，或者M-1个与TC-RNTI的差分值，或者也可以不包括，分配的其余的TC-RNTI可以按照预设的规则得到，比如可以为TC-RNTI、TC-RNTI+1、…、TC-RNTI+M-1。可选地，所述Msg 4中还可以包括一套或者M套无线资源配置信息，如信道质量指示(CQI，Channel Quality Indicator)反馈资源、上行调度请求(SR，Scheduling Request)资源等，如果是一套无线资源配置信息，分配的其余的无线资源可以按照预设的规则得到。
组长将这些信息通知给有调度请求的UE时，可以采用广播的方式，也可以采用单播的方式，这里不做限定。
方式3：
步骤1：组长在某个时频资源上发送preamble，该PRACH资源对应需要进行随机接入的UE的个数M，或者eNB已知随机接入的请求数目；
步骤2：eNB通过UE发送的PRACH资源(时频资源信息或者preamble信息)获知UE是组长，发送RAR，RAR中携带TA、M个TC-RNTI等信息。
步骤3：UE发送Msg 3，所述Msg 3采用M个TC-RNTI的其中一个进行加扰。
步骤4：eNB发送Msg 4，Msg 4是用Msg 3中的TC-RNTI加扰的，Msg 4中可以包括1套或者M套无线资源(也可以继续携带M个TC-RNTI)。
方式4：
在该方式中，组员通过短距离通信已知组长发送的PRACH资源(包括时频资源及preamble)，从而获知RA-RNTI。
实现随机接入的过程包括以下步骤：
步骤1：组长UE在某个时频资源上发送preamble，该PRACH资源对应需要进行随机接入的UE的个数M；
步骤2：eNB通过所述UE发送的PRACH资源(时频资源信息或者preamble信息)获知UE是组长，发送RAR，RAR中携带TA、TC-RNTI信息和UL grant信息，这里与实施例中二中的方法1类似。
步骤3：组内有接入请求的UE分别在自身对应的UL grant对应的资源上发送Msg 3；
步骤4：eNB根据收到的Msg 3，分别发送Msg 4，所述Msg 4的个数与所述eNB收到的Msg 3的个数相同。
该示例中，为了避免UE漏检RAR，eNB可以在一个窗口内将RAR重复发送。
方式5
该方式中组员通过短距离通信已知组长发送的PRACH资源(包括时频资源及preamble)，从而获知RA-RNTI。
随机接入过程包括以下步骤：
步骤1：组长在某个时频资源上发送preamble；
步骤2：eNB通过接收到的PRACH资源(时频资源信息或者preamble信息)获知发送所述PRACH资源的UE是组长，发送RAR，RAR中携带TA、TC-RNTI等信息。
步骤3：所有的UE或组内有接入请求的UE监听RAR，得到TA和TC-RNTI。
步骤4：监听到RAR后，组长UE发送Msg 3，携带组ID或者一个预设值，以及组内的需要进行随机接入的UE的个数M。该组ID或者一个预设值可以是组长通知的，或者可以是网络侧通知的，或者可以是预设的。
步骤5：eNB发送Msg 4，Msg 4中携带上一步骤中的组ID或者预设值，Msg 4是用TC-RNTI加扰的，Msg 4中还可以包括M-1个C-RNTI值，以及 一套或者M套无线资源配置信息。所有的UE/UE组内有接入请求的UE可以监听TC-RNTI加扰的Msg 4，按照预设的规则得到自己的C-RNTI和无线资源配置信息。
该方式实施之前，组员UE可以已知组长UE发送的PRACH资源(时频，preamble)，从而获知RA-RNTI。该方式中RAR和Msg 4的接收比较重要，为了避免UE漏检RAR和Msg 4，可以考虑分别在一个窗口内将RAR和Msg 4重复发送。
方式6：
组员UE已知组长UE发送的PRACH资源(包括时频资源及preamble)，从而获知RA-RNTI。
该示例中的随机接入过程包括以下步骤：
步骤1：UE在某个时频资源上发送preamble，该PRACH资源对应需要进行随机接入的UE的个数M，或者eNB已知随机接入的请求数目；
步骤2：eNB通过接收到的PRACH资源(时频资源信息或者preamble信息)获知UE是组长，发送RAR，RAR中携带TA、TC-RNTI等信息。
步骤3：组内有接入请求的UE监听RAR，得到TA和TC-RNTI。
步骤4：组长发送Msg 3，携带一个组内UE都已知的ID；
步骤5：eNB收到Msg 3后，发送Msg 4，Msg 4是用TC-RNTI加扰的，Msg 4中包含M-1个C-RNTI值，或者M-1个与TC-RNTI的差分值，并包括一套或者M套无线资源。
步骤6：UE组内所有的UE或者组内有接入请求的UE监听TC-RNTI加扰的Msg 4，按照预设的规则或者随机得到自己的C-RNTI和无线资源配置信息。
方式7：
组员UE已知组长UE发送的PRACH资源(包括时频资源和preamble)，从而获知RA-RNTI。
该方式中的随机接入过程包括以下步骤：
步骤1：UE在某个时频资源上发送preamble，该PRACH资源对应需要进行随机接入的UE的个数M，或者eNB已知随机接入的请求数目；
步骤2：eNB通过接收到的PRACH资源(时频资源信息或者preamble信息)获知发送所述PRACH资源的UE是组长，发送RAR，RAR中携带TA、多个TC-RNTI等信息。
步骤3：组长采用一个TC-RNTI发送Msg 3，携带组ID或者一个预设值。
步骤4：接收到Msg 3后，eNB发送Msg 4，Msg 4可以为一个用Msg 3中的TC-RNTI加扰的消息，所述Msg 4中可以包含一套或者M套无线资源(也可以继续携带多个TC-RNTI)。所有的UE/组内有接入请求的UE可以监听TC-RNTI加扰的Msg 4，按照预设的规则得到自己的C-RNTI和无线资源配置信息。
或者，eNB也可以发送多个Msg 4，分别用多个TC-RNTI加扰。所有的UE或者组内有随机接入需要的UE可以按照预设的规则或者随机确定自身对应的C-RNTI，接收所述C-RNTI对应的Msg 4。
如果两个UE选择了相同的无线资源(包括C-RNTI、无线空口资源等)，其发送的上行数据可能总会发生碰撞，导致发送失败。eNB如果发现这些UE总是传输失败，那么可以发送指示信令，令其重新接入。
如果正确接收Msg 4的UE数小于eNB分配的无线资源数，那么就会存在浪费。UE可以发送一个信息来指示其占用了某一套资源，如果对于某一套资源，eNB未收到所述信息，eNB则认为该套资源未被UE占用。比如可以定义一个时间窗，在该时间窗内，UE发送一个指示信息指示其占用了该套资源(TC-RNTI，无线资源)，该指示信息可以是SR、ACK等，如果eNB未收到所述指示信息的话，则eNB认为该套资源是浪费的资源，可以分给其他UE用。
实施例四
基于上述实施例相同的技术构思，参见图5，其示出了本发明实施例提供了一种用户设备UE 50，可以包括：发送单元501和监听单元502；其中，
所述发送单元501，设置为：在一个时频资源上向演进基站eNB发送前 导preamble，所述时频资源包括时域资源和频域资源；
所述监听单元502，设置为：监听所述eNB发送的所述preamble对应的随机接入响应RAR。
示例性地，参见图6，所述监听单元502可以包括：第一解扰子单元5021A、第一接收子单元5022A和分配子单元5023A，其中，
所述第一解扰子单元5021A设置为：根据预设的或所述preamble对应的无线网络临时标识RA-RNTI对调度所述RAR的下行控制信息DCI的循环冗余校验码CRC进行解扰；
所述第一接收子单元5022A设置为：接收所述RAR；所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；
所述分配子单元5023A设置为：根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权中确定分配给所述UE自身的TC-RNTI和/或上行授权。
可选地，所述分配子单元5023A是设置为：根据所述UE自身的标识按照预设的规则确定分配给所述UE自身的TC-RNTI和/或上行授权。
示例性地，参见图7，所述监听单元502可包括：确定子单元5021B、第二解扰子单元5022B和第二接收子单元5023B，其中，
所述确定子单元5021B设置为：根据所述UE各自的标识和/或preamble确定所述UE各自对应的RA-RNTI；
所述第二解扰子单元5022B设置为：根据所述UE各自对应的RA-RNTI对调度所述RAR的DCI的CRC进行解扰；
所述第二接收子单元5023B设置为：接收所述UE自身对应的RAR，所述RAR中包含分配给所述UE对应的一个TC-RNTI和/或一个上行授权。
可选地，所述发送单元501还可设置为：根据分配给所述UE自身的上行授权发送消息3。
可选地，参见图6和图7，所述UE50还可包括接收单元503，其可设置为：接收所述eNB发送的消息4。
可选地，所述接收所述eNB发送的消息4可包括：
调度所述消息4的DCI的CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，所述消息4可包括用于所述UE确定分配给自身的无线资源的至少一套无线资源。
可选地，所述消息4可包括：分配给对应的所述UE的一套无线资源。
示例性地，所述发送单元501还可设置为：向所述eNB发送用于向所述eNB通知所述UE接入成功的指示信号。
可选地，所述指示信号可以为调度请求SR或者确认ACK信号。
可选地，所述接收单元503还可设置为：接收所述eNB发送的用于指示所述UE重新发起随机接入的指示信息。
示例性地，接收单元503还可设置为：接收由所述eNB发送的DCI或者寻呼消息或无线资源控制RRC消息；
或者，接收由所述第二UE发送的随机接入请求信息。
可选地，所述接收由所述eNB发送的DCI或者寻呼消息或RRC消息可包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
示例性地，可选地，所述发送单元501是设置为：周期地在一个频域资源上发送一个preamble。
可选地，所述消息3和消息4中可包含所述UE组的组标识或者一个预设字段。
可选地，所述消息3中可包含UE组内的有随机接入请求的UE的个数或者UE组包含的UE数或者一个预设的UE数。
可选地，所述preamble和/或时域资源和/或频域资源可以与UE组内的有随机接入请求的UE的个数或者UE组包含的UE数或者一个预设的UE数对应。
实施例五
基于前述实施例相同的技术构思，参见图8，其示出了本发明实施例提供了演进基站eNB 80，其可以包括：接收单元801和发送单元802，其中，
所述接收单元801设置为：接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；其中，所述时频资源包括时域资源和频域资源，所述第一UE为所述UE组内的至少一个UE；
所述发送单元802设置为：发送所述preamble对应的随机接入响应RAR。
示例性地，所述RAR可包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；所述RAR可用于所述第一UE和/或第二UE根据自身的标识按照预设的规则从所述至少一个TC-RNTI和/或上行授权中确定分配给自身的TC-RNTI和/或上行授权，所述第二UE可以为所述UE组中的全部或者部分UE。
示例性地，所述RAR可包括分配给对应的所述第一UE和/或第二UE的一个TC-RNTI和/或一个上行授权，所述第二UE可以为所述UE组中的全部或者部分UE。
可选地，所述接收单元801还可设置为：接收由所述第一UE和/或第二UE根据分配给自身的上行授权所发送的消息3。
可选地，所述发送单元802还可设置为：向所述第一UE和/或第二UE发送消息4。
可选地，所述向所述第一UE和/或第二UE发送消息4可包括：调度所述消息4的下行控制信息DCI的循环冗余校验码CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
可选地，所述消息4可包括用于所述第一UE和/或第二UE确定分配给自身的无线资源的至少一套无线资源。
可选地，所述消息4可包括：分配给对应的第一UE或第二UE的一套无线资源。
示例性地，所述接收单元801还可设置为：接收由所述第一UE和/或第二UE发送的用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；所述指示信号为调度请求SR或者确认ACK信号。
示例性地，所述发送单元802还可设置为：向所述第一UE和/或第二UE发送用于指示所述第一UE和/或第二UE重新发起随机接入指示信息。
示例性地，所述发送单元802还可设置为：向所述第一UE和/或第二UE发送DCI或者寻呼消息或无线资源控制RRC消息。
可选地，所述向所述第一UE和/或第二UE发送DCI或者寻呼消息或RRC消息可包括以下至少一项：
所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
示例性地，可选地，所述接收单元801是设置为：周期性地在一个频域资源上接收所述第一UE发送的一个preamble。
可选地，所述消息3和消息4中可包含所述UE组的组标识或者一个预设字段。
可选地，所述消息3中可包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数。
此外，基于前述实施例相同的技术构思，本发明实施例还提供了一种随机接入的系统，所述系统包括用户设备UE和演进基站eNB；其中，
用户设备UE组内的第一UE设置为：在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
所述第一UE和/或所述UE组内的第二UE设置为：监听所述eNB发送的所述preamble对应的随机接入响应RAR；其中，所述第一UE为所述UE组内的至少一个UE，所述第二UE为所述UE组中的全部或者部分UE；
所述eNB设置为：接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；
以及，发送所述preamble对应的RAR。
实施例六
本发明实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述随机接入的方法。
本领域内的技术人员可以明白，本发明实施例可提供为方法、系统、或计算机程序产品。因此，本发明实施例可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明实施例是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。可以理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令，产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件、处理器等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，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。
上述实施例中的装置/功能模块/功能单元可以采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，也可以分布在多个计算装置所组成的网络上。
上述实施例中的装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
本领域的普通技术人员可以理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围。本申请的保护范围以权利要求所定义的范围为准。
工业实用性
本发明实施例所提供的一种随机接入的方法、设备和系统，用户设备UE组内的一个或多个UE在一个时频资源上向演进基站eNB发送一个前导preamble，以指示eNB执行UE组内部分或全部UE的随机接入处理。如此， 一组UE在一次随机接入中只需要占用一个PRACH资源(包括时域资源、频域资源和preamble)，这样，可以大大节省PRACH资源，满足巨量机器通信的需要。

Claims (71)

  1. 一种随机接入的方法，所述方法包括：
    用户设备UE组内的第一UE在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
    所述第一UE和/或所述UE组内的第二UE监听所述eNB发送的所述preamble对应的随机接入响应RAR；其中，所述第一UE为所述UE组内的至少一个UE，所述第二UE为所述UE组中的全部或者部分UE。
  2. 根据权利要求1所述的方法，其中，所述第一UE为以下至少一项：
    固定的至少一个UE；或者，
    按照预设规则确定的至少一个UE；或者，
    所述eNB通知的至少一个UE。
  3. 根据权利要求1所述的方法，其中，所述preamble和/或所述时域资源和/或频域资源为预设的，或者为由所述UE组的组标识确定的，或者为所述eNB通知的。
  4. 根据权利要求1所述的方法，其中，所述第一UE和/或第二UE监听所述eNB发送的所述preamble对应的RAR包括：
    所述第一UE和/或第二UE根据预设的或所述preamble对应的无线网络临时标识RA-RNTI对调度所述RAR的下行控制信息DCI的循环冗余校验码CRC进行解扰，并接收所述RAR；所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；
    所述第一UE和/或第二UE根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权，确定分配给自身的TC-RNTI和/或上行授权。
  5. 根据权利要求4所述的方法，其中，所述第一UE和/或第二UE根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权，确定分配给自身的TC-RNTI和/或上行授权包括：
    所述第一UE和/或第二UE根据自身的标识按照预设的规则确定分配给自身的TC-RNTI和/或上行授权。
  6. 根据权利要求1所述的方法，其中，所述第一UE和/或第二UE监听所述eNB发送的所述preamble对应的RAR包括：
    所述第一UE和/或第二UE根据各自的标识和/或preamble确定各自对应的RA-RNTI，并根据所述各自对应的RA-RNTI对调度所述RAR的DCI的CRC进行解扰，并接收自身对应的RAR，所述RAR中包含分配给对应的所述第一UE或第二UE的一个TC-RNTI和/或一个上行授权。
  7. 根据权利要求4所述的方法，所述第一UE和/或第二UE监听所述eNB发送的所述preamble对应的RAR之后，所述方法还包括：
    所述第一UE和/或第二UE根据分配给自身的上行授权发送消息3。
  8. 根据权利要求7所述的方法，所述第一UE和/或第二UE根据分配给自己的上行授权发送消息3之后，还包括：
    所述第一UE和/或第二UE接收所述eNB发送的消息4。
  9. 根据权利要求8所述的方法，其中，所述第一UE和/或第二UE接收eNB发送的消息4包括：
    调度所述消息4的DCI的CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
  10. 根据权利要求9所述的方法，其中，所述消息4包括至少一套无线资源，所述第一UE和/或第二UE分配给自身的无线资源由所述第一UE和/或第二UE根据所述消息4中包括的至少一套无线资源确定。
  11. 根据权利要求10所述的方法，其中，所述第一UE和/或第二UE分配给自身的无线资源还由所述UE根据自身的标识按照预设的规则确定。
  12. 根据权利要求9所述的方法，其中，所述消息4包括：
    分配给对应的第一UE或第二UE的一套无线资源。
  13. 根据权利要求8所述的方法，在所述第一UE和/或第二UE接收eNB发送的消息4之后，还包括：
    所述第一UE和/或第二UE向所述eNB发送用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号。
  14. 根据权利要求13所述的方法，其中，所述指示信号为调度请求SR或者确认ACK信号。
  15. 根据权利要求8所述的方法，在所述第一UE和/或第二UE接收eNB发送的消息4之后，还包括：
    所述第一UE和/或第二UE接收所述eNB发送的用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
  16. 根据权利要求1所述的方法，在所述UE组内的第一UE在一个时频资源上发送一个preamble之前，还包括：
    所述第一UE和/或第二UE接收由所述eNB发送的DCI或者寻呼消息或无线资源控制RRC消息；
    或者，所述第一UE接收由所述第二UE发送的随机接入请求信息。
  17. 根据权利要求16所述的方法，其中，所述第一UE和/或第二UE接收由eNB发送的DCI或者寻呼消息或RRC消息包括以下至少一项：
    所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
    所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
  18. 根据权利要求16所述的方法，所述第一UE接收到所述第二UE发送的随机接入请求信息之后，还包括：
    所述第一UE对所接收到的组内第二UE的随机接入请求进行计数；
    当计数达到预设阈值时，所述第一UE在一个时频资源上发送一个preamble。
  19. 根据权利要求1所述的方法，其中，所述UE组内的第一UE在一个时频资源上发送一个preamble包括：
    所述第一UE周期地在一个频域资源上发送一个preamble。
  20. 根据权利要求8所述的方法，其中，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
  21. 根据权利要求7所述的方法，其中，所述消息3中包含所述UE组 内的有随机接入请求的UE的个数或者所述UE组包含的UE数或者一个预设的UE数。
  22. 根据权利要求3所述的方法，其中，所述preamble和/或时域资源和/或频域资源与所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数或者一个预设的UE数对应。
  23. 一种随机接入的方法，所述方法包括：
    演进基站eNB接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；其中，所述时频资源包括时域资源和频域资源，所述第一UE为所述UE组内的至少一个UE；
    所述eNB发送所述preamble对应的随机接入响应RAR。
  24. 根据权利要求23所述的方法，其中，所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；所述RAR用于所述第一UE和/或第二UE根据自身的标识按照预设的分配规则从所述至少一个TC-RNTI和/或上行授权中确定分配给自身的TC-RNTI和/或上行授权，所述第二UE为所述UE组中的全部或者部分UE。
  25. 根据权利要求23所述的方法，其中，所述RAR包括分配给对应的所述第一UE和/或第二UE的一个TC-RNTI和/或一个上行授权，所述第二UE为所述UE组中的全部或者部分UE。
  26. 根据权利要求24所述的方法，在所述eNB发送所述preamble对应的RAR之后，所述方法还包括：
    所述eNB接收由所述第一UE和/或第二UE根据分配给自身的上行授权所发送的消息3。
  27. 根据权利要求26所述的方法，在所述eNB接收由所述第一UE和/或第二UE根据分配给自己的上行授权所发送的消息3之后，所述方法还包括：
    所述eNB向所述第一UE和/或第二UE发送消息4。
  28. 根据权利要求27所述的方法，其中，所述eNB向所述第一UE和/或第二UE发送消息4包括：
    调度所述消息4的下行控制信息DCI的循环冗余校验码CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
  29. 根据权利要求28所述的方法，其中，所述消息4包括至少一套无线资源，所述第一UE和/或第二UE分配给自身的无线资源由所述第一UE和/或第二UE根据所述消息4中包括的至少一套无线资源确定。
  30. 根据权利要求28所述的方法，其中，所述消息4包括：
    分配给对应的第一UE或第二UE的一套无线资源。
  31. 根据权利要求27所述的方法，在所述eNB向所述第一UE和/或第二UE发送消息4之后，所述方法还包括：
    所述eNB接收由所述第一UE和/或第二UE发送的用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；所述指示信号为调度请求SR或者确认ACK信号。
  32. 根据权利要求27所述的方法，在所述eNB向所述第一UE和/或第二UE发送消息4之后，所述方法还包括：
    所述eNB向所述第一UE和/或第二UE发送用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
  33. 根据权利要求23所述的方法，所述eNB接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble之前，所述方法还包括：
    所述eNB向所述第一UE和/或第二UE发送DCI或者寻呼消息或无线资源控制RRC消息。
  34. 根据权利要求33所述的方法，其中，所述eNB向所述第一UE和/或第二UE发送DCI或者寻呼消息或RRC消息包括以下至少一项：
    所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
    所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
  35. 根据权利要求23所述的方法，其中，所述eNB接收所述UE组内的 第一UE在一个时频资源上发送的前导preamble包括：
    所述eNB周期性地在一个频域资源上接收所述第一UE发送的一个preamble。
  36. 根据权利要求24所述的方法，其中，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
  37. 根据权利要求23所述的方法，其中，所述消息3中包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数。
  38. 一种用户设备UE，所述UE包括：发送单元和监听单元；其中，
    所述发送单元设置为：在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
    所述监听单元设置为：监听所述eNB发送的所述preamble对应的随机接入响应RAR。
  39. 根据权利要求38所述的UE，其中，所述监听单元包括：第一解扰子单元、第一接收子单元和分配子单元，其中，
    所述第一解扰子单元设置为：根据预设的或所述preamble对应的无线网络临时标识RA-RNTI对调度所述RAR的下行控制信息DCI的循环冗余校验码CRC进行解扰；
    所述第一接收子单元设置为：接收所述RAR；所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；
    所述分配子单元设置为：根据所述RAR中包含的至少一个TC-RNTI和/或至少一个上行授权中确定分配给所述UE自身的TC-RNTI和/或上行授权。
  40. 根据权利要求39所述的UE，其中，所述分配子单元是设置为：根据所述UE自身的标识按照预设的规则确定分配给所述UE自身的TC-RNTI和/或上行授权。
  41. 根据权利要求38所述的UE，其中，所述监听单元，包括：确定子单元、第二解扰子单元和第二接收子单元，其中，
    所述确定子单元设置为：根据所述UE各自的标识和/或preamble确定所述UE各自对应的RA-RNTI；
    所述第二解扰子单元设置为：根据所述UE各自对应的RA-RNTI对调度 所述RAR的DCI的CRC进行解扰；
    所述第二接收子单元，设置为：接收所述UE自身对应的RAR，所述RAR中包含分配给所述UE对应的一个TC-RNTI和/或一个上行授权。
  42. 根据权利要求39所述的UE，所述发送单元还设置为：根据分配给所述UE自身的上行授权发送消息3。
  43. 根据权利要求39所述的UE，所述UE还包括接收单元，所述接收单元设置为：接收所述eNB发送的消息4。
  44. 根据权利要求43所述的UE，其中，所述接收所述eNB发送的消息4包括：
    调度所述消息4的DCI的CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
  45. 根据权利要求44所述的UE，其中，所述消息4包括用于所述UE确定分配给自身的无线资源的至少一套无线资源。
  46. 根据权利要求44所述的UE，其中，所述消息4包括：分配给对应的所述UE的一套无线资源。
  47. 根据权利要求43所述的UE，所述发送单元还设置为：向所述eNB发送用于向所述eNB通知所述UE接入成功的指示信号。
  48. 根据权利要求47所述的UE，其中，所述指示信号为调度请求SR或者确认ACK信号。
  49. 根据权利要求43所述的UE，所述接收单元还设置为：接收所述eNB发送的用于指示所述UE重新发起随机接入的指示信息。
  50. 根据权利要求38所述的UE，所述接收单元还设置为：接收由所述eNB发送的DCI或者寻呼消息或无线资源控制RRC消息；或者，接收由所述第二UE发送的随机接入请求信息。
  51. 根据权利要求50所述的UE，其中，所述接收由所述eNB发送的DCI或者寻呼消息或RRC消息包括以下至少一项：
    所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
    所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或Preamble的时域资源和/或preamble的频域资源。
  52. 根据权利要求38所述的UE，其中，所述发送单元是设置为：周期地在一个频域资源上发送一个preamble。
  53. 根据权利要求43所述的UE，其中，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
  54. 根据权利要求42所述的UE，其中，所述消息3中包含UE组内的有随机接入请求的UE的个数或者UE组包含的UE数或者一个预设的UE数。
  55. 根据权利要求38所述的UE，其中，所述preamble和/或时域资源和/或频域资源与UE组内的有随机接入请求的UE的个数或者UE组包含的UE数或者一个预设的UE数对应。
  56. 一种演进基站eNB，所述eNB包括：接收单元和发送单元，其中，
    所述接收单元设置为：接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；其中，所述时频资源包括时域资源和频域资源，所述第一UE为所述UE组内的至少一个UE；
    所述发送单元设置为：发送所述preamble对应的随机接入响应RAR。
  57. 根据权利要求56所述的eNB，其中，所述RAR包括至少一个临时小区无线网络临时标识TC-RNTI和/或至少一个上行授权；所述RAR用于所述第一UE和/或第二UE根据自身的标识按照预设的规则从所述至少一个TC-RNTI和/或上行授权中确定分配给自身的TC-RNTI和/或上行授权，所述第二UE为所述UE组中的全部或者部分UE。
  58. 根据权利要求56所述的eNB，其中，所述RAR包括分配给对应的所述第一UE和/或第二UE的一个TC-RNTI和/或一个上行授权，所述第二UE为所述UE组中的全部或者部分UE。
  59. 根据权利要求57所述的eNB，所述接收单元还设置为：接收由所述第一UE和/或第二UE根据分配给自身的上行授权所发送的消息3。
  60. 根据权利要求59所述的eNB，所述发送单元还设置为：向所述第一UE和/或第二UE发送消息4。
  61. 根据权利要求59所述的eNB，其中，所述向所述第一UE和/或第二UE发送消息4包括：调度所述消息4的下行控制信息DCI的循环冗余校验码CRC采用分配给所述第一UE和/或第二UE的TC-RNTI进行加扰。
  62. 根据权利要求61所述的eNB，其中，所述消息4包括用于所述第一UE和/或第二UE确定分配给自身的无线资源的至少一套无线资源。
  63. 根据权利要求61所述的eNB，其中，所述消息4包括：
    分配给对应的第一UE或第二UE的一套无线资源。
  64. 根据权利要求60所述的eNB，所述接收单元还设置为：接收由所述第一UE和/或第二UE发送的用于向所述eNB通知所述第一UE和/或第二UE接入成功的指示信号；所述指示信号为调度请求SR或者确认ACK信号。
  65. 根据权利要求60所述的eNB，所述发送单元还设置为：向所述第一UE和/或第二UE发送用于指示所述第一UE和/或第二UE重新发起随机接入的指示信息。
  66. 根据权利要求56所述的eNB，所述发送单元还设置为：向所述第一UE和/或第二UE发送DCI或者寻呼消息或无线资源控制RRC消息。
  67. 根据权利要求66所述的方法，其中，所述向所述第一UE和/或第二UE发送DCI或者寻呼消息或RRC消息包括以下至少一项：
    所述DCI、或调度所述寻呼消息或RRC消息的DCI的CRC采用所述UE组的组标识进行加扰；以及，
    所述DCI或者寻呼消息或者RRC消息中包含所述UE组的组标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含第一UE和/或第二UE的标识；以及，
    所述DCI或者寻呼消息或者RRC消息中包含Preamble标识和/或 Preamble的时域资源和/或preamble的频域资源。
  68. 根据权利要求56所述的方法，其中，所述接收单元是设置为：周期性地在一个频域资源上接收所述第一UE发送的一个preamble。
  69. 根据权利要求57所述的eNB，其中，所述消息3和消息4中包含所述UE组的组标识或者一个预设字段。
  70. 根据权利要求56所述的eNB，其中，所述消息3中包含所述UE组内的有随机接入请求的UE的个数或者所述UE组包含的UE数。
  71. 一种随机接入的系统，所述系统包括用户设备UE和演进基站eNB；其中，
    用户设备UE组内的第一UE设置为：在一个时频资源上向演进基站eNB发送前导preamble，所述时频资源包括时域资源和频域资源；
    所述第一UE和/或所述UE组内的第二UE设置为：监听所述eNB发送的所述preamble对应的随机接入响应RAR；其中，所述第一UE为所述UE组内的至少一个UE，所述第二UE为所述UE组中的全部或者部分UE；
    所述eNB设置为：接收用户设备UE组内的第一UE在一个时频资源上发送的前导preamble；
    以及，发送所述preamble对应的RAR。
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