WO2019119317A1 - 用于传输随机接入前导的方法和终端设备 - Google Patents

用于传输随机接入前导的方法和终端设备 Download PDF

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Publication number
WO2019119317A1
WO2019119317A1 PCT/CN2017/117566 CN2017117566W WO2019119317A1 WO 2019119317 A1 WO2019119317 A1 WO 2019119317A1 CN 2017117566 W CN2017117566 W CN 2017117566W WO 2019119317 A1 WO2019119317 A1 WO 2019119317A1
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WIPO (PCT)
Prior art keywords
transmission
random access
value
resource
access preamble
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PCT/CN2017/117566
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English (en)
French (fr)
Inventor
石聪
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Oppo广东移动通信有限公司
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2017/117566 priority Critical patent/WO2019119317A1/zh
Priority to CN201780096667.8A priority patent/CN111316743A/zh
Priority to KR1020207019746A priority patent/KR102428113B1/ko
Priority to AU2017444147A priority patent/AU2017444147B2/en
Priority to JP2020533241A priority patent/JP7348183B2/ja
Priority to EP17935106.9A priority patent/EP3726916A4/en
Priority to CN202111481666.XA priority patent/CN114126078B/zh
Publication of WO2019119317A1 publication Critical patent/WO2019119317A1/zh
Priority to US16/898,415 priority patent/US11357058B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • 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
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • 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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, and in particular, to a method and a terminal device for transmitting a random access preamble.
  • a media access control (MAC) entity in a terminal device maintains only one random access preamble number of times timer (PREAMBLE_TRANSMISSION_COUNTER)
  • the timer is used not only for the counting of power ramping, but also for counting the number of preamble transmissions, thereby limiting the maximum number of transmissions of a random access channel (RACH).
  • PREAMBLE_TRANSMISSION_COUNTER When the RACH process is initiated, the initial value of PREAMBLE_TRANSMISSION_COUNTER is set to 1. After the completion of the transmission of Msg1, if the terminal random access response (RAR) reception fails or the competition fails, PREAMBLE_TRANSMISSION_COUNTER is incremented by 1 until the PREAMBLE_TRANSMISSION_COUNTER reaches the maximum value. In addition, PREAMBLE_TRANSMISSION_COUNTER also determines the transmission power of Msg1 each time RACH is re-initiated.
  • the present application provides a method and a terminal device for transmitting a random access preamble, which can enable a terminal device to determine a power increase counter of a random access preamble according to whether a transmission beam changes, and a transmission resource according to a random access preamble. Whether it belongs to the unlicensed band, the maximum number of transmissions of the random access preamble corresponding to the device.
  • a first aspect provides a method for transmitting a random access preamble, the method comprising: performing an ith transmission of the random access preamble, where i is a positive integer greater than one; if the random access preamble The ith transmission uses the same beam as the i-1th transmission, and the value of the random access preamble power increase counter is incremented by one.
  • the method for transmitting a random access preamble in the embodiment of the present application includes a PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and a random access preamble (hereinafter referred to as a preamble "preamble") performed by the terminal device.
  • the first transmission if it is the same as the beam used in the previous transmission, that is, the beam does not change, the value of PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is incremented by one; if the beam changes, the value of PREAMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the terminal device
  • the PREAMBLE_POWER_RAMPING_COUNTER supports power ramping unchanged when beam switching occurs during preamble transmission.
  • the method before the adding the value of the power increase counter of the random access preamble to one, the method further includes: determining that the power increase is not required to be suspended. counter.
  • the method further includes: if the ith transmission of the random access preamble is the same as the use of the i-1th transmission
  • the synchronization signal block determines that the ith transmission of the random access preamble is the same as the beam used for the i-1th transmission.
  • the method before the performing the ith transmission of the random access preamble, the method further includes: at least one preset The first preset time-frequency resource is determined in the time-frequency resource, and the first preset time-frequency resource is used for the ith transmission of the random access preamble.
  • the determining, by the at least one preset time-frequency resource, the first preset time-frequency resource includes: determining the at least one pre- And determining whether the second preset time-frequency resource in the time-frequency resource is occupied; if the second preset time-frequency resource is not occupied, determining the second preset time-frequency resource as the first preset time If the second preset time-frequency resource is occupied, determining whether the preset time-frequency resources other than the second preset time-frequency resource of the at least one preset time-frequency resource are occupied .
  • the determining whether the second preset time-frequency resource in the at least one preset time-frequency resource is occupied includes: determining The energy value of the signal carried by the second preset time-frequency resource; if the energy value of the signal is less than or equal to the preset energy value, determining that the second preset time-frequency resource is not occupied; or The energy value of the signal is greater than the preset energy value, and determining that the second preset time-frequency resource is not occupied.
  • the value of the power increase counter after the ith transmission of the random access preamble is used to determine the random connection The i+1th transmission power of the preamble.
  • the method further includes: if determining the random The ith transmission failure of the access preamble fails, and the value of the number of transmission times counter of the random access preamble is incremented by one, and the number of transmission times counter is used to record the number of transmissions of the random access preamble.
  • the method further includes: The value of the transmission number counter is less than or equal to the maximum number of transmissions of the random access preamble, and performs the (i+1)th transmission of the random access preamble; or, if the value of the transmission number counter is greater than the transmission The maximum number of times determines that the random access procedure failed.
  • the method further includes: determining that the receiving cell of the random access preamble is a primary cell; transmitting radio resource control (RRC) signaling to the network device corresponding to the primary cell, where the RRC signaling is used to indicate that the radio link fails.
  • RRC radio resource control
  • the method further includes: determining, that the transmission resource used for transmitting the random access preamble belongs to a licensed frequency band or an unlicensed frequency band; The transmission resource belongs to a licensed frequency band, and the maximum number of transmission times of the random access preamble is set to a first value; or, if the transmission resource belongs to an unlicensed frequency band, the maximum number of transmission times is set to a second value. The first value is different from the second value.
  • the first value is less than the second value.
  • the method further includes: receiving configuration information sent by the network device, where the configuration information includes the first value and/or the Two values.
  • the terminal device includes a PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and the non-first transmission of the preamble performed by the terminal device is used if it is used with the previous transmission. If the beam is the same, that is, the beam does not change, the value of PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is incremented by one; if the beam changes, the value of PREAMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the PREAMBLE_POWER_RAMPING_COUNTER of the terminal device supports beam generation during preamble transmission. Ensure that power ramping does not change during conversion.
  • a second aspect provides a method for transmitting a random access preamble, the method comprising: determining that a transmission resource used for transmitting a random access preamble belongs to a licensed frequency band or an unlicensed frequency band; if the transmission resource belongs to a licensed frequency band, Setting a maximum number of transmission times of the random access preamble to a first value; or, if the transmission resource belongs to an unlicensed frequency band, setting the maximum number of transmission times to a second value, the first value and the location The second value is different.
  • the terminal device may set the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if the authorized resource is the largest, the corresponding transmission number is the largest.
  • the value is set to a first value; if it belongs to an unlicensed frequency band, the corresponding maximum number of transmission times is set to a second value, and the first value is different from the second value, for example, the second value is set to be greater than the first value to reduce
  • the terminal device determines the probability of the random access procedure failing due to the LBT failure.
  • the first value is less than the second value.
  • the method further includes: receiving configuration information sent by the network device, where the configuration information includes the first value and/or the Two values.
  • the method further includes: if the ith transmission of the random access preamble fails, the random access preamble is The value of the number of transmission counters is incremented by one, and the number of transmission times counter is used to record the number of transmissions of the random access preamble, where i is a positive integer.
  • the method further includes: The value of the transmission number counter is less than or equal to the maximum number of transmission times, and performs the (i+1)th transmission of the random access preamble; or, if the value of the transmission number counter is greater than the maximum number of transmission times, determining The random access procedure failed.
  • the method further includes: determining that the receiving cell of the random access preamble is The primary cell sends RRC signaling to the network device corresponding to the primary cell, where the RRC signaling is used to indicate that the wireless link fails.
  • the method further includes: determining whether the first resource in the transmission resource is occupied; if the first resource is occupied Determining whether other resources in the transmission resource except the first resource are occupied;
  • the method further includes: if there is no unoccupied resource in the transmission resource, determining that the ith transmission of the random access preamble fails.
  • the terminal device may set the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if the authorized resource is the largest, the corresponding transmission number is the largest.
  • the value is set to a first value; if it belongs to an unlicensed frequency band, the corresponding maximum number of transmission times is set to a second value, and the first value is different from the second value, for example, the second value is set to be greater than the first value to reduce
  • the terminal device determines the probability of the random access procedure failing due to the LBT failure.
  • a terminal device for performing the method of any of the above first aspect or any of the possible implementations of the first aspect.
  • the terminal device comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • a terminal device for performing the method in any of the above-mentioned second aspect or any possible implementation of the second aspect.
  • the terminal device comprises means for performing the method of any of the above-described second or second aspects of the second aspect.
  • a terminal device comprising: a storage unit and a processor, the storage unit is configured to store an instruction, the processor is configured to execute an instruction stored by the memory, and when the processor executes the instruction stored by the memory The execution causes the processor to perform the method of the first aspect or any possible implementation of the first aspect.
  • a terminal device comprising: a storage unit and a processor, the storage unit is configured to store an instruction, the processor is configured to execute an instruction stored by the memory, and when the processor executes the instruction stored by the memory The execution causes the processor to perform the method of the second aspect or any possible implementation of the second aspect.
  • a seventh aspect a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a computer readable medium for storing a computer program comprising instructions for performing the method of the second aspect or any of the possible implementations of the second aspect.
  • a computer program product comprising instructions for performing the above-described first aspect or any of the possible implementations of the first aspect when the computer runs the finger of the computer program product A method of transmitting a random access preamble.
  • the computer program product can be run on the terminal device of the above third aspect.
  • a computer program product comprising instructions for performing the second aspect or any of the possible implementations of the second aspect when the computer runs the finger of the computer program product A method of transmitting a random access preamble.
  • the computer program product can be run on the terminal device of the above fourth aspect.
  • FIG. 1 is a schematic flowchart of a method for transmitting a random access preamble according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for transmitting a random access preamble according to another embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a terminal device according to another embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a terminal device according to still another embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a terminal device according to still another embodiment of the present application.
  • GSMC global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE Time Division Duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • 5G future fifth generation
  • 5G fifth generation
  • NR new radio
  • the terminal device in the embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or User device.
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, where the network device may be a base transceiver station (BTS) in a GSMC system or a CDMA system, or a base station (NodeB in a WCDMA system. NB), which may also be an evolved base station (evolutional NodeB, eNB or eNodeB) in the LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device may
  • the embodiment of the present application is not limited to a relay station, an access point, an in-vehicle device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network.
  • FIG. 1 shows a schematic flow diagram of a method 100 for transmitting a random access preamble, which may be performed by a terminal device, in accordance with an embodiment of the present application.
  • the method 100 includes: S110, performing an ith transmission of the random access preamble, where i is a positive integer greater than one; S120, if the i-th transmission of the random access preamble and the i-th The same beam is used for one transmission, and the value of the power increase counter of the random access preamble is incremented by one.
  • the method 100 before the terminal device performs the ith transmission of the random access preamble (hereinafter referred to as the preamble "preamble"), the method 100 further includes: the terminal device determining the transmission resource used to execute the preamble.
  • the transmission resource used for transmitting the preamble may belong to the licensed frequency band or may belong to the unlicensed frequency band. If the transmission resource belongs to the licensed frequency band, that is, the terminal device performs the ith transmission of the preamble according to the resource configured by the network device.
  • the terminal device may determine the first preset time-frequency resource in the at least one preset time-frequency resource according to the preset condition, where the first preset time-frequency resource is used for the i-th of the preamble
  • the secondary transmission wherein the preset condition may be a listen before talk (LBT).
  • the terminal device determines at least one preset time-frequency resource that can be used to transmit the preamble, where the at least one preset time-frequency resource belongs to the unauthorized The frequency band, the terminal device determines, in the at least one preset time-frequency resource, the first preset time-frequency resource used for the ith transmission of the preamble.
  • the second preset time-frequency resource in the at least one preset time-frequency resource is taken as an example, the terminal device determines whether the second preset time-frequency resource is occupied, if the second preset time-frequency resource is not If the second preset time-frequency resource is occupied, the second preset time-frequency resource is determined to be the at least one time-frequency resource for performing the ith transmission of the preamble; Determining whether other preset time-frequency resources are occupied in a preset time-frequency resource, until an unoccupied preset time-frequency resource is found, and determining the unoccupied preset time-frequency resource as the first preset time-frequency The resource, where the other preset time-frequency resources do not include the second preset time-frequency resource.
  • the terminal device may consider the preamble The i transmission failed.
  • the terminal device may consider the preamble The i transmission failed.
  • the method may be performed by using other resources, or, after a period of time, detecting whether the at least one preset time-frequency resource has an unoccupied preset. The time-frequency resource is used to perform the i+1 transmission using the unoccupied preset time-frequency resource.
  • the second pre-determination may be determined by using a second preset time-frequency resource as an example.
  • the energy of the signal in the time-frequency resource is determined to determine whether the second preset time-frequency resource is occupied.
  • the terminal device may detect and determine an energy value of the signal carried by the second preset time-frequency resource, and if the energy value of the signal is less than or equal to the preset energy value, determine that the second preset time-frequency resource is not If the energy value of the signal is greater than the preset energy value, it is determined that the second preset time-frequency resource is occupied.
  • the preset energy value may be set according to an actual application, and the embodiment of the present application is not limited thereto.
  • the terminal device determines a transmission resource for transmitting the preamble, and performs an ith transmission of the preamble by using the transmission resource.
  • the preamble uses the beam and the i th -
  • the beam used for one transmission is the same, that is, the beam of the preamble transmitted twice is the same, and the value of the power increase counter (PREAMBLE_POWER_RAMPING_COUNTER) corresponding to the preamble is incremented by one.
  • the ith transmission of the preamble in the embodiment of the present application is not the first transmission, that is, the value of the i is a positive integer greater than 1, and the i-1th transmission of the preamble exists before the ith transmission.
  • the terminal device may determine, by using a preamble transmission number counter (PREAMBLE_TRANSMISSION_COUNTER) corresponding to the preamble, whether the ith transmission is a non-first transmission.
  • PREAMBLE_TRANSMISSION_COUNTER a preamble transmission number counter
  • the initial value of PREAMBLE_TRANSMISSION_COUNTER is set to 1, and then the value of the PREAMBLE_TRANSMISSION_COUNTER is incremented by one every time the transmission of the preamble fails. Therefore, when the value of the PREAMBLE_TRANSMISSION_COUNTER is greater than 1, it indicates that the i-th transmission is not the first transmission.
  • the terminal device determines that the beam used for the i-th transmission of the preamble is the same as the beam used for the i-1th transmission, and may include: if the i-th transmission and the i-1th transmission of the preamble use the same synchronization signal (Synchronous signal block, SS block), that is, the SS block is not changed, it can be determined that the beam used for the i-th transmission of the preamble is the same as the beam used for the i-1th transmission, that is, in the i-th transmission
  • the transmit beam used by the terminal device to transmit the preamble is the same as the transmit beam used by the terminal device to transmit the preamble in the i-1th transmission. If no beam switching occurs, the terminal device may transmit the i-th transmission after the preamble.
  • the value of the corresponding PREAMBLE_POWER_RAMPING_COUNTER is incremented by 1.
  • the terminal device transmits the transmit beam used by the preamble and the i-1th transmission. If the transmission beam used by the terminal device to transmit the preamble is different, the value of the corresponding PREAMBLE_POWER_RAMPING_COUNTER after the i-th transmission of the preamble remains unchanged.
  • the terminal device determines that the beam used for the ith transmission of the preamble is the same as the beam used for the i-1th transmission, and the value of the corresponding PREAMBLE_POWER_RAMPING_COUNTER is further increased by one, and may further include: If the terminal device determines that the beam used for the i-th transmission of the preamble is the same as the beam used for the i-1th transmission, and the terminal device determines that the PREAMBLE_POWER_RAMPING_COUNTER does not need to be suspended, the value of the PREAMBLE_POWER_RAMPING_COUNTER is incremented by one, otherwise remains unchanged.
  • the MAC entity of the terminal device may suspend the PREAMBLE_POWER_RAMPING_COUNTER according to the instruction of the lower layer, so that the PREAMBLE_POWER_RAMPING_COUNTER remains unchanged; if the terminal device does not receive the indication after the i-th transmission of the preamble, or receives an indication that it is not suspended
  • the terminal device adds 1 to the value of the PREAMBLE_POWER_RAMPING_COUNTER corresponding to the i-th transmission of the preamble when the beam used for the i-th transmission of the preamble is the same as the beam used for the i-th transmission.
  • the value of the PREAMBLE_POWER_RAMPING_COUNTER may be used to determine the transmission power of the preamble sent by the terminal device. Specifically, after the ith transmission of the preamble is performed by the terminal device, if the ith transmission fails, the terminal device may determine whether to perform the (i+1)th transmission of the preamble, and if executed, the i+1th transmission During transmission, the power of the terminal device to transmit the preamble may be determined according to the value of the corresponding PREAMBLE_POWER_RAMPING_COUNTER determined after performing the (i+1)th transmission of the preamble.
  • the power of the preamble sent by the terminal device PREAMBLE_RECEIVED_TARGET_POWER can be determined by using the following formula:
  • the ra-Preamble Initial Received Target Power, the DELTA_PREAMBLE, and the power Ramping Step are all pre-configured parameters, and the PREAMBLE_POWER_RAMPING_COUNTER indicates the value of the corresponding PREAMBLE_POWER_RAMPING_COUNTER determined by the terminal device after performing the (i+1)th transmission of the preamble.
  • the terminal device may determine whether the ith transmission fails according to whether the terminal device successfully receives the RAR and according to whether the contention is successful. Specifically, when the terminal device performs the ith transmission of the preamble, the preamble, that is, msg1, is sent to the network device, and the preamble may be determined by random selection, and the network device sends the RAR, that is, msg2, to the terminal device according to the received preamble.
  • the terminal device fails to receive the RAR successfully in the RAR window, determining that the i-th transmission of the preamble fails, for example, the terminal device fails to send the preamble to the network device, or the network device sends the RAR to the terminal device, etc. This will cause the terminal device to fail to receive the RAR in the RAR window.
  • the network device may not receive msg2 in the RAR window, and the terminal device determines that the i-th transmission of the preamble fails.
  • RAR window can be set according to the actual application, which is not limited in this embodiment of the present application.
  • the terminal device fails to compete, the ith transmission of the preamble of the terminal device fails.
  • the terminal device receives the msg2 sent by the network device, the device sends the msg3 to the network device, and sends an RRC connection request (Connection Request) through the msg3, where the msg3 includes the identifier of the terminal device, and the network device sends the terminal to the terminal according to the msg3.
  • the device sends msg4, which also includes the identity of the terminal device.
  • the network device receives the msg3 sent by the multiple terminal devices, and each msg3 includes an identifier of the corresponding terminal device, where the network device determines one terminal among the multiple terminal devices.
  • the device sends msg4 to the terminal device, and the msg4 includes the identifier of the terminal device, so that the plurality of terminal devices determine whether the contention is successful according to the received msg4. If the terminal device determines its own identification information in the msg4, the competition succeeds. If the terminal device does not determine its own identity in msg4, the terminal device fails to compete.
  • the terminal device may determine whether to perform the (i+1)th transmission of the preamble according to the value of the PREAMBLE_TRANSMISSION_COUNTER corresponding to the preamble. Specifically, the terminal device may record the number of times the preamble is transmitted through the PREMBLE_TRANSMISSION_COUNTER, and determine that the random access procedure fails when the value of the PREAMBLE_TRANSMISSION_COUNTER reaches the maximum number of transmissions.
  • the terminal device when the terminal device performs the ith transmission failure of the preamble, the value of the PREAMBLE_TRANSMISSION_COUNTER corresponding to the preamble is incremented by 1. At this time, if the value of the corresponding PREAMBLE_TRANSMISSION_COUNTER is less than or equal to the maximum number of transmissions, the terminal device continues to perform the first i+1 preamble transmission; if the value of the corresponding PREAMBLE_TRANSMISSION_COUNTER is greater than the maximum number of transmissions, the terminal device determines that the random access procedure fails.
  • the terminal device may determine whether the cell in which the preamble transmission is located is the primary cell, and if the primary cell, the terminal device sends the network device corresponding to the primary cell to the network device corresponding to the primary cell.
  • RRC signaling the RRC signaling is used to indicate a radio link failure; if it is not a primary cell but a secondary cell, the RRC signaling need not be sent.
  • the primary cell may include a primary cell of the primary base station to which the terminal device is connected, or a primary cell of the secondary base station to which the terminal device is connected;
  • the secondary cell may include a secondary cell of the primary base station to which the terminal device is connected, or the terminal device
  • the secondary cell of the connected secondary base station is not limited to this embodiment.
  • the maximum number of transmissions of the preamble may be set according to an actual application, for example, may be set to a certain fixed value, or the maximum number of transmission times may be determined according to the configuration of the network device.
  • the terminal device may set the maximum number of transmission times according to whether the frequency band in which the resource for transmitting the preamble is the licensed frequency band.
  • the terminal device sets the maximum number of transmission times of the preamble to the first value; if the resource used for transmitting the preamble belongs to the unlicensed frequency band, the terminal device transmits the number of preamble transmissions.
  • the maximum value is set to a second value that is different from the second value.
  • the terminal device needs to perform an LBT on the corresponding preset time-frequency resource to determine an unoccupied resource to perform preamble transmission for the unlicensed frequency band; correspondingly, the network device also needs to be in the corresponding pre-
  • the LBT is performed on the time-frequency resource to determine the unoccupied resource to perform the transmission of the RAR corresponding to the preamble. Therefore, this will increase the probability that the terminal device cannot receive the RAR in the RARwindow.
  • the terminal device may set the second value corresponding to the unlicensed band to be greater than the first value corresponding to the licensed band according to whether the resource for transmitting the preamble belongs to the maximum number of transmissions of the preamble, to reduce the failure of the LBT.
  • the terminal device determines the probability of the random access procedure failing.
  • the determining, by the terminal device, the first value and the second value, the terminal device receiving the configuration information sent by the network device, where the configuration information includes the first value and/or the second value is not limited to this.
  • the terminal device includes a PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and the non-first transmission of the preamble performed by the terminal device is used if it is used with the previous transmission. If the beam is the same, that is, the beam does not change, the value of PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is incremented by one; if the beam changes, the value of PREAMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the PREAMBLE_POWER_RAMPING_COUNTER of the terminal device supports beam generation during preamble transmission. Ensure that power ramping does not change during conversion.
  • the method 200 includes: S210, determining that a transmission resource used for transmitting a random access preamble belongs to a licensed frequency band or an unlicensed frequency band; and S220, if the transmission resource belongs to a licensed frequency band, transmitting the random access preamble The maximum number of times is set to a first value; S230, if the transmission resource belongs to an unlicensed frequency band, the maximum value of the number of transmission times is set to a second value, and the first value is different from the second value.
  • the terminal device needs to perform LBT on the corresponding transmission resource to determine the unoccupied resource to perform preamble transmission, in consideration of the resource transmission preamble for the terminal device using the unlicensed frequency band;
  • the network device also needs to perform the LBT on the corresponding transmission resource to determine the unoccupied resource to perform the transmission of the RAR corresponding to the preamble. Therefore, the LBT of the terminal device and the network device increases the transmission duration, thereby increasing the terminal device. The probability that the RAR cannot be received in the RAR window.
  • the terminal device may set the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if it belongs to the authorized resource, the corresponding maximum number of transmission times Set to a first value; if it belongs to an unlicensed frequency band, the corresponding maximum number of transmission times is set to a second value, and the first value is different from the second value, for example, the second value is set to be greater than the first value, to reduce
  • the terminal device caused by the LBT failure determines the probability of the random access procedure failing.
  • the terminal device includes a transmission number counter (PREAMBLE_TRANSMISSION_COUNTER) for recording the number of transmissions of the preamble. Specifically, the terminal device sets the initial value of the PREAMBLE_TRANSMISSION_COUNTER to 1, and then, when the terminal device performs the ith transmission failure of the preamble, the value of the PREAMBLE_TRANSMISSION_COUNTER is incremented by 1, where i is a positive integer.
  • PREAMBLE_TRANSMISSION_COUNTER transmission number counter
  • the terminal device may determine whether to perform the (i+1)th transmission of the preamble according to the value of the PREAMBLE_TRANSMISSION_COUNTER corresponding to the preamble. Specifically, the terminal device may record, by using the PREAMBLE_TRANSMISSION_COUNTER, the number of times the preamble is transmitted, and when the value of the PREAMBLE_TRANSMISSION_COUNTER reaches the maximum number of transmissions, determine that the random access procedure fails, where the maximum number of transmissions may be the first value or the second value.
  • the terminal device when the terminal device performs the ith transmission failure of the preamble, the value of the PREAMBLE_TRANSMISSION_COUNTER corresponding to the preamble is incremented by 1. At this time, if the value of the corresponding PREAMBLE_TRANSMISSION_COUNTER is less than or equal to the maximum number of transmissions, the terminal device continues to perform the first i+1 preamble transmission; if the value of the corresponding PREAMBLE_TRANSMISSION_COUNTER is greater than the maximum number of transmissions, the terminal device determines that the random access procedure fails.
  • the terminal device may determine whether the maximum number of transmissions of the preamble is the first value or the second value according to whether the transmission preamble belongs to the unlicensed frequency band.
  • the first value and the second value may be set according to an actual application, or the terminal device may receive configuration information sent by the network device, where the configuration information includes the first value and/or the second value, and the terminal device is configured according to the terminal device.
  • the configuration information determines the first value and the second value, and the embodiment of the present application is not limited thereto.
  • the method 200 further includes: determining, in the transmission resource for transmitting the preamble, a resource for performing the ith transmission. Specifically, for the authorized resource, the terminal device performs the ith preamble transmission by using the authorized resource.
  • the terminal device determines, by using the LBT, the resource that can be used to perform the ith transmission of the preamble in the unlicensed transmission resource. Specifically, the terminal device determines, in the unlicensed transmission resource, whether the first resource is occupied. If the first resource is not occupied, the first resource is used to perform the ith transmission of the preamble; if the first resource is occupied, Then, in the unlicensed resource, it is determined whether the other resources except the first resource are occupied, until the unoccupied resource is determined, and the ith transmission of the preamble is performed by using the unoccupied resource.
  • the terminal device may consider that the ith transmission of the preamble fails.
  • the terminal device may perform other resources, or, after a period of time, detect whether there is an unoccupied time-frequency resource in the unlicensed transmission resource again, and The i+1 transmission is performed by using the unoccupied time-frequency resource.
  • the time-frequency resource of the unlicensed transmission resource is occupied may be determined in multiple manners.
  • the first resource is used as an example, and the energy of the signal in the first resource may be determined to determine the first Whether a resource is occupied.
  • the terminal device may detect and determine an energy value of the signal carried by the first resource, and if the energy value of the signal is less than or equal to the preset energy value, determine that the first resource is not occupied; if the energy value of the signal If the preset energy value is greater than, the first resource is determined to be occupied.
  • the preset energy value may be set according to an actual application, and the embodiment of the present application is not limited thereto.
  • the terminal device may further determine whether the ith transmission fails according to whether the terminal device successfully receives the RAR and according to whether the contention is successful. Specifically, when the terminal device performs the ith transmission of the preamble, the preamble, that is, msg1, is sent to the network device, and the preamble may be determined by random selection, and the network device sends the RAR, that is, msg2, to the terminal device according to the received preamble. If the terminal device fails to successfully receive the RAR in the RAR window, it determines that the i-th transmission of the preamble fails. For example, if the terminal device sends a preamble failure to the network device, or the network device sends a RAR failure to the terminal device, the terminal device fails to receive the RAR in the RAR window.
  • the network device may not receive msg2 in the RAR window, and the terminal device determines that the i-th transmission of the preamble fails.
  • RAR window can be set according to the actual application, which is not limited in this embodiment of the present application.
  • the terminal device may also determine that the ith transmission failure of the preamble is failed. Specifically, when the terminal device receives the msg2 sent by the network device, the device sends the msg3 to the network device, and sends an RRC connection request (Connection Request) through the msg3, where the msg3 includes the identifier of the terminal device, and the network device sends the terminal to the terminal according to the msg3. The device sends msg4, which also includes the identity of the terminal device.
  • RRC connection request Connection Request
  • the network device receives the msg3 sent by the multiple terminal devices, and each msg3 includes an identifier of the corresponding terminal device, where the network device determines one terminal among the multiple terminal devices.
  • the device sends msg4 to the terminal device, and the msg4 includes the identifier of the terminal device, so that the plurality of terminal devices determine whether the contention is successful according to the received msg4. If the terminal device determines its own identification information in the msg4, the competition succeeds. If the terminal device does not determine its own identity in msg4, the terminal device fails to compete.
  • the preamble transmission is performed on the unlicensed transmission resource, and the terminal device determines that the probability of the preamble transmission failure is greater than the probability of the preamble transmission preamble. Therefore, when the preamble transmission resource transmits the preamble, the maximum preamble transmission times may be set. For a larger second value, when the authorized transmission resource transmits the preamble, the maximum value of the corresponding preamble transmission times is set to a smaller first value.
  • the terminal device may determine whether the cell in which the preamble transmission is located is a primary cell, and if the primary cell is the primary cell, the terminal device sends the primary cell to the primary cell.
  • the corresponding network device sends RRC signaling, which is used to indicate a radio link failure; if it is not a primary cell but a secondary cell, the RRC signaling need not be sent.
  • the primary cell may include a primary cell of the primary base station to which the terminal device is connected, or a primary cell of the secondary base station to which the terminal device is connected;
  • the secondary cell may include a secondary cell of the primary base station to which the terminal device is connected, or the terminal device
  • the secondary cell of the connected secondary base station is not limited to this embodiment.
  • the terminal device may set the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if the authorized resource is the largest, the corresponding transmission number is the largest.
  • the value is set to a first value; if it belongs to an unlicensed frequency band, the corresponding maximum number of transmission times is set to a second value, and the first value is different from the second value, for example, the second value is set to be greater than the first value to reduce
  • the terminal device determines the probability of the random access procedure failing due to the LBT failure.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the terminal device 300 includes: a transceiver unit 310 and a processing unit 320, and optionally, a determining unit 330.
  • the transceiver unit 310 is configured to: perform an ith transmission of the random access preamble, where i is a positive integer greater than one; the processing unit 320 is configured to: if the ith transmission of the random access preamble and the first The same beam is used for the i-1 transmission, and the value of the power increase counter of the random access preamble is incremented by one.
  • the terminal device in the embodiment of the present application includes the PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and the non-first transmission of the preamble performed by the terminal device is the same as the beam used in the previous transmission, that is, the beam does not change. Then, the value of the PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is increased by one; if the beam changes, the value of the PREMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the PREAMBLE_POWER_RAMPING_COUNTER of the terminal device supports the power ramping when the beam conversion occurs during the preamble transmission.
  • the determining unit 330 is configured to: before the processing unit 320 adds 1 to the value of the power increase counter of the random access preamble, determine that the power increase counter does not need to be suspended.
  • the determining unit 330 is configured to: if the ith transmission of the random access preamble is the same as the synchronization signal block of the i-1th transmission, determine the ith transmission and the first transmission of the random access preamble The beams used for i-1 transmissions are the same.
  • the determining unit 330 is configured to determine, in the at least one preset time-frequency resource, a first preset time-frequency resource, where the transceiver unit 310 performs the ith transmission of the random access preamble, where the first The preset time-frequency resource is used for the ith transmission of the random access preamble.
  • the determining unit 330 is specifically configured to: determine whether the second preset time-frequency resource in the at least one preset time-frequency resource is occupied; if the second preset time-frequency resource is not occupied, the first The second preset time-frequency resource is determined as the first preset time-frequency resource; or, if the second preset time-frequency resource is occupied, determining the second preset time-frequency resource in the at least one preset time-frequency resource Whether other preset time-frequency resources are occupied.
  • the determining unit 330 is specifically configured to: determine an energy value of a signal carried by the second preset time-frequency resource; and if the energy value of the signal is less than or equal to a preset energy value, determine the second preset time-frequency. The resource is not occupied; or if the energy value of the signal is greater than the preset energy value, it is determined that the second preset time-frequency resource is not occupied.
  • the value of the power increase counter after the ith transmission of the random access preamble is used to determine the i+1th transmission power of the random access preamble.
  • the processing unit 320 is configured to: after the ith transmission of the random access preamble is performed by the transceiver unit 310, if it is determined that the ith transmission failure of the random access preamble fails, the random access preamble is determined.
  • the value of the number of transmission times counter is incremented by one, and the number of transmission times counter is used to record the number of transmissions of the random access preamble.
  • the transceiver unit 310 is specifically configured to: after the processing unit 320 adds 1 to the value of the transmission number counter of the random access preamble, if the value of the transmission number counter is less than or equal to the transmission of the random access preamble The maximum number of times, the i+1th transmission of the random access preamble is performed; or, if the value of the transmission number counter is greater than the maximum number of transmission times, it is determined that the random access procedure fails.
  • the determining unit 330 is configured to: after the determining unit 330 determines that the random access procedure fails, determining that the receiving cell of the random access preamble is the primary cell; the transceiver unit 310 is specifically configured to: correspond to the primary cell
  • the network device sends RRC signaling, which is used to indicate that the radio link fails.
  • the determining unit 330 is configured to: determine that the transmission resource used for transmitting the random access preamble belongs to a licensed frequency band or an unlicensed frequency band; the processing unit 320 is specifically configured to: if the transmission resource belongs to a licensed frequency band, the randomizing The maximum number of transmissions of the access preamble is set to a first value; or, if the transmission resource belongs to an unlicensed frequency band, the maximum number of transmission times is set to a second value, and the first value is different from the second value.
  • the first value is less than the second value.
  • the transceiver unit 310 is specifically configured to: receive configuration information sent by the network device, where the configuration information includes the first value and/or the second value.
  • terminal device 300 may correspond to the method 100 in the embodiment of the present application, and the foregoing and other operations and/or functions of the respective units in the terminal device 300 respectively implement the method in FIG. 1 .
  • the corresponding process of the terminal device is not described here for brevity.
  • the terminal device in the embodiment of the present application includes the PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and the non-first transmission of the preamble performed by the terminal device is the same as the beam used in the previous transmission, that is, the beam does not change. Then, the value of the PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is increased by one; if the beam changes, the value of the PREMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the PREAMBLE_POWER_RAMPING_COUNTER of the terminal device supports the power ramping when the beam conversion occurs during the preamble transmission.
  • the terminal device 400 includes: a determining unit 410 and a processing unit 420.
  • the transceiver unit 430 is further included.
  • the determining unit 410 is configured to: determine that the transmission resource used for transmitting the random access preamble belongs to the licensed frequency band or the unlicensed frequency band; the processing unit 420 is configured to: if the transmission resource belongs to the authorized frequency band, the random access preamble The maximum number of transmissions is set to a first value; the processing unit 420 is further configured to: if the transmission resource belongs to an unlicensed frequency band, set a maximum value of the transmission times to a second value, where the first value is different from the second value .
  • the terminal device in the embodiment of the present application sets the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if it belongs to the authorized resource, the corresponding maximum number of transmission times is set to the first value;
  • the authorized frequency band is correspondingly set to the second value of the maximum number of transmissions, and the first value is different from the second value, for example, the second value is set to be greater than the first value, so as to reduce the terminal device determining the random connection due to the LBT failure.
  • the probability of failure of the entry process is provided.
  • the first value is less than the second value.
  • the transceiver unit 430 is configured to: receive configuration information sent by the network device, where the configuration information includes the first value and/or the second value.
  • the processing unit 420 is specifically configured to: if the ith transmission failure of the random access preamble fails, add a value of the number of transmission times counter of the random access preamble, where the transmission number counter is used to record the random connection The number of transmissions into the preamble, i is a positive integer.
  • the processing unit 420 is specifically configured to: after the value of the transmission number counter of the random access preamble is incremented by one, if the value of the transmission number counter is less than or equal to the maximum number of transmission times, perform the random access. The i+1th transmission of the preamble; or, if the value of the transmission number counter is greater than the maximum number of transmission times, it is determined that the random access procedure fails.
  • the determining unit 410 is configured to: after the determining the random access procedure fails, determining that the receiving cell of the random access preamble is the primary cell; the transceiver unit 430 is configured to: use the network device corresponding to the primary cell The RRC signaling is sent, and the RRC signaling is used to indicate that the radio link fails.
  • the determining unit 410 is specifically configured to: determine whether the first resource in the transmission resource is occupied; if the first resource is occupied, determine whether other resources in the transmission resource except the first resource are occupied. Or, if the first resource is not occupied, use the first resource to perform the ith transmission of the random access preamble.
  • the determining unit 410 is specifically configured to: if the first resource is occupied, determine whether the other resource except the first resource is occupied, if the transmission resource does not exist in the transmission resource The resource determines that the i-th transmission of the random access preamble fails.
  • terminal device 400 may correspond to the method 200 in the embodiment of the present application, and the foregoing and other operations and/or functions of the respective units in the terminal device 400 respectively implement the method in FIG. 2 .
  • the corresponding process of the terminal device is not described here for brevity.
  • the terminal device 400 may be the terminal device 300 of the embodiment of the present application, but the embodiment of the present application is not limited thereto.
  • the terminal device in the embodiment of the present application sets the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if it belongs to the authorized resource, the corresponding maximum number of transmission times is set to the first value;
  • the authorized frequency band is correspondingly set to the second value of the maximum number of transmissions, and the first value is different from the second value, for example, the second value is set to be greater than the first value, so as to reduce the terminal device determining the random connection due to the LBT failure.
  • the probability of failure of the entry process is provided.
  • FIG. 5 shows a schematic block diagram of a terminal device 500 according to an embodiment of the present application.
  • the terminal device 500 includes a processor 510 and a transceiver 520.
  • the processor 510 is connected to the transceiver 520, and is optional.
  • the terminal device 500 further includes a memory 530, and the memory 530 is connected to the processor 510.
  • the processor 510, the memory 530, and the transceiver 520 communicate with each other through an internal connection path to transfer and/or control data signals.
  • the memory 530 can be used to store instructions, and the processor 510 is configured to execute the memory 530.
  • An instruction to control the transceiver 520 to send information or a signal the transceiver 520 is configured to: perform an ith transmission of the random access preamble, where i is a positive integer greater than one; the processor 510 is configured to: if the random connection The i-th transmission into the preamble uses the same beam as the i-1th transmission, and the value of the random access preamble power increase counter is incremented by one.
  • the terminal device in the embodiment of the present application includes the PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and the non-first transmission of the preamble performed by the terminal device is the same as the beam used in the previous transmission, that is, the beam does not change. Then, the value of the PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is increased by one; if the beam changes, the value of the PREMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the PREAMBLE_POWER_RAMPING_COUNTER of the terminal device supports the power ramping when the beam conversion occurs during the preamble transmission.
  • the processor 510 is configured to: before adding the value of the power increase counter of the random access preamble to one, determine that the power increase counter does not need to be suspended.
  • the processor 510 is configured to: if the ith transmission of the random access preamble is the same as the synchronization signal block of the i-1th transmission, determine the first part of the random access preamble The i transmission is the same as the beam used for the i-1th transmission.
  • the processor 510 is configured to determine, in the at least one preset time-frequency resource, the first preset time-frequency before the transceiver 520 performs the ith transmission of the random access preamble.
  • the first preset time-frequency resource is used for the ith transmission of the random access preamble.
  • the processor 510 is configured to: determine whether the second preset time-frequency resource in the at least one preset time-frequency resource is occupied; if the second preset time-frequency resource is not occupied Determining the second preset time-frequency resource as the first preset time-frequency resource; or determining, if the second preset time-frequency resource is occupied, determining the second pre-determined time-frequency resource Set whether other preset time-frequency resources outside the time-frequency resource are occupied.
  • the processor 510 is configured to: determine an energy value of a signal carried by the second preset time-frequency resource; and determine the second if the energy value of the signal is less than or equal to a preset energy value.
  • the preset time-frequency resource is not occupied; or if the energy value of the signal is greater than the preset energy value, it is determined that the second preset time-frequency resource is not occupied.
  • the value of the power increase counter after the ith transmission of the random access preamble is used to determine the (i+1)th transmission power of the random access preamble.
  • the processor 510 is configured to: after the ith transmission of the random access preamble is performed by the transceiver 520, if it is determined that the ith transmission of the random access preamble fails, The value of the number of transmission times counter of the random access preamble is incremented by one, and the number of transmission times counter is used to record the number of transmissions of the random access preamble.
  • the transceiver 520 is specifically configured to: after the processor 510 adds 1 to the value of the number of transmission times counter of the random access preamble, if the value of the number of transmission times counter is less than or equal to the random number The maximum number of transmissions of the access preamble is performed, and the i+1th transmission of the random access preamble is performed; or, if the value of the transmission number counter is greater than the maximum number of transmission times, it is determined that the random access procedure fails.
  • the processor 510 is configured to: after determining that the random access procedure fails, determining that the receiving cell of the random access preamble is the primary cell; the transceiver 520 is configured to: correspond to the primary cell
  • the network device sends RRC signaling, which is used to indicate that the radio link fails.
  • the processor 510 is configured to: determine that the transmission resource used for transmitting the random access preamble belongs to a licensed frequency band or an unlicensed frequency band; if the transmission resource belongs to a licensed frequency band, the random access preamble is used. The maximum number of transmission times is set to a first value; or, if the transmission resource belongs to an unlicensed frequency band, the maximum number of transmission times is set to a second value, which is different from the second value.
  • the first value is smaller than the second value.
  • the transceiver 520 is specifically configured to: receive configuration information sent by the network device, where the configuration information includes the first value and/or the second value.
  • terminal device 500 may correspond to the terminal device 300 in the embodiment of the present application, and may correspond to the corresponding body in the method 100 according to the embodiment of the present application, and each of the terminal devices 500
  • the foregoing and other operations and/or functions of the unit are respectively implemented in order to implement the corresponding processes of the terminal devices in the respective methods in FIG. 1.
  • no further details are provided herein.
  • the terminal device in the embodiment of the present application includes the PREAMBLE_POWER_RAMPING_COUNTER for recording power ramping, and the non-first transmission of the preamble performed by the terminal device is the same as the beam used in the previous transmission, that is, the beam does not change. Then, the value of the PREAMBLE_POWER_RAMPING_COUNTER corresponding to the preamble is increased by one; if the beam changes, the value of the PREMBLE_POWER_RAMPING_COUNTER remains unchanged, that is, the PREAMBLE_POWER_RAMPING_COUNTER of the terminal device supports the power ramping when the beam conversion occurs during the preamble transmission.
  • FIG. 6 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application.
  • the terminal device 600 includes a processor 610 and a transceiver 620.
  • the processor 610 is connected to the transceiver 620, and is optional.
  • the terminal device 600 further includes a memory 630, and the memory 630 is connected to the processor 610.
  • the processor 610, the memory 630 and the transceiver 620 communicate with each other through an internal connection path, and the data signal is transmitted and/or controlled.
  • the memory 630 can be used to store instructions, and the processor 610 is configured to execute the storage of the memory 630.
  • the processor 610 is configured to: determine that the transmission resource used for transmitting the random access preamble belongs to a licensed frequency band or an unlicensed frequency band; if the transmission resource belongs to the licensed frequency band, the random connection The maximum number of transmissions into the preamble is set to a first value; if the transmission resource belongs to an unlicensed frequency band, the maximum number of transmission times is set to a second value, and the first value is different from the second value.
  • the terminal device in the embodiment of the present application sets the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if it belongs to the authorized resource, the corresponding maximum number of transmission times is set to the first value;
  • the authorized frequency band is correspondingly set to the second value of the maximum number of transmissions, and the first value is different from the second value, for example, the second value is set to be greater than the first value, so as to reduce the terminal device determining the random connection due to the LBT failure.
  • the probability of failure of the entry process is provided.
  • the first value is smaller than the second value.
  • the transceiver 620 is configured to: receive configuration information sent by the network device, where the configuration information includes the first value and/or the second value.
  • the processor 610 is configured to: if the ith transmission failure of the random access preamble fails, increase the value of the transmission access counter of the random access preamble by one, where the transmission counter is used. The number of transmissions of the random access preamble is recorded, and i is a positive integer.
  • the processor 610 is configured to: after adding the value of the number of transmission times counter of the random access preamble to one, if the value of the number of transmission times counter is less than or equal to the maximum number of transmission times, execute The i+1th transmission of the random access preamble; or, if the value of the transmission number counter is greater than the maximum number of transmission times, determining that the random access procedure fails.
  • the processor 610 is configured to determine, after the determining that the random access procedure fails, the receiving cell of the random access preamble as a primary cell; the transceiver 620 is configured to: to the primary cell The corresponding network device sends RRC signaling, which is used to indicate that the radio link fails.
  • the processor 610 is configured to: determine whether the first resource in the transmission resource is occupied; if the first resource is occupied, determine other than the first resource in the transmission resource. Whether the resource is occupied; or, if the first resource is not occupied, the first resource is used to perform the ith transmission of the random access preamble.
  • the processor 610 is configured to: if the first resource is occupied, determine whether the other resource except the first resource is occupied in the transmission resource, if the transmission resource does not There is an unoccupied resource, and it is determined that the i-th transmission of the random access preamble fails.
  • terminal device 600 may correspond to the terminal device 400 in the embodiment of the present application, and may correspond to the corresponding body in the method 200 according to the embodiment of the present application, and each of the terminal devices 600
  • the foregoing and other operations and/or functions of the unit are respectively implemented in order to implement the corresponding processes of the terminal devices in the respective methods in FIG. 2, and are not described herein again for brevity.
  • the terminal device in the embodiment of the present application sets the maximum number of transmission times of the preamble according to whether the resource for transmitting the preamble belongs to the unlicensed frequency band, and if it belongs to the authorized resource, the corresponding maximum number of transmission times is set to the first value;
  • the authorized frequency band is correspondingly set to the second value of the maximum number of transmissions, and the first value is different from the second value, for example, the second value is set to be greater than the first value, so as to reduce the terminal device determining the random connection due to the LBT failure.
  • the probability of failure of the entry process is provided.
  • the above method embodiments of the present application may be applied to a processor or implemented by a processor.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above processor may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable Logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory.
  • the volatile memory can be a random access memory (RAM) that acts as an external cache.
  • RAM random access memory
  • RAM random access memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • SDRAM double data rate synchronous DRAM
  • DDR SDRAM double data rate synchronous DRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronously connected dynamic random access memory
  • DR RAM direct memory bus random access memory
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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Abstract

本申请实施例涉及用于传输随机接入前导的方法和终端设备。该方法包括：执行该随机接入前导的第i次传输，i为大于1的正整数；若该随机接入前导的第i次传输与第i-1次传输使用相同的波束，将该随机接入前导的功率增加计数器的值加1。本申请实施例的用于传输随机接入前导的方法和终端设备，能够使得终端设备根据传输波束是否发生改变，确定随机接入前导的功率增加计数器。

Description

用于传输随机接入前导的方法和终端设备 技术领域
本申请涉及通信领域，尤其涉及用于传输随机接入前导的方法和终端设备。
背景技术
在长期演进(long term evolution，LTE)系统的随机接入过程中，终端设备中的介质访问控制(media access control，MAC)实体(entity)只维护一个随机接入前导传输次数计时器(PREAMBLE_TRANSMISSION_COUNTER)，该计时器不仅用于功率增加(power ramping)的计数，也用于统计前导传输次数，从而限制随机接入信道(random access channel，RACH)的最大传输次数。
当RACH过程发起时，将PREAMBLE_TRANSMISSION_COUNTER的初始值设置为1。在完成传输Msg1后，如果终端随机接入响应(random access response，RAR)接收失败或者竞争失败，则PREAMBLE_TRANSMISSION_COUNTER加1，直到该PREAMBLE_TRANSMISSION_COUNTER达到最大值。另外，PREAMBLE_TRANSMISSION_COUNTER也决定了每次重新发起RACH时，Msg1的传输功率。
而在新无线(new radio，NR)系统中，为了支持波束赋形(beam forming)，引入了两个计数器，一个是PREAMBLE_TRANSMISSION_COUNTER，另外一个是为了计算power ramping设置的功率增加计数器(PREAMBLE_POWER_RAMPING_COUNTER)。而如何维护这两个计数器是一个需要解决的问题。
发明内容
本申请提供了一种用于传输随机接入前导的方法和终端设备，能够使得终端设备根据传输波束是否发生改变，确定随机接入前导的功率增加计数器；以及根据传输随机接入前导的传输资源是否属于非授权频段，设备对应的随机接入前导的传输次数最大值。
第一方面，提供了一种用于传输随机接入前导的方法，该方法包括：执 行所述随机接入前导的第i次传输，i为大于1的正整数；若所述随机接入前导的第i次传输与第i-1次传输使用相同的波束，将所述随机接入前导的功率增加计数器的值加1。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备中包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的随机接入前导(以下简称前导“preamble”)的非首次传输，若其与前一次传输所使用的波束相同，即波束未发生改变，则将该preamble对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证power ramping不变。
结合第一方面，在第一方面的一种实现方式中，在所述将所述随机接入前导的功率增加计数器的值加1之前，所述方法还包括：确定无需暂停所述的功率增加计数器。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，所述方法还包括：若所述随机接入前导的第i次传输与第i-1次传输的使用相同的同步信号块，确定所述随机接入前导的第i次传输与第i-1次传输使用的波束相同。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，在所述执行所述随机接入前导的第i次传输之前，所述方法还包括：在至少一个预设时频资源中确定第一预设时频资源，所述第一预设时频资源用于所述随机接入前导的第i次传输。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，所述在至少一个预设时频资源中确定第一预设时频资源，包括：确定所述至少一个预设时频资源中的第二预设时频资源是否被占用；若所述第二预设时频资源未被占用，将所述第二预设时频资源确定为所述第一预设时频资源；或，若所述第二预设时频资源被占用，确定所述至少一个预设时频资源中除所述第二预设时频资源外的其它预设时频资源是否被占用。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，所述确定所述至少一个预设时频资源中的第二预设时频资源是否被占用，包括：确定所述第二预设时频资源承载的信号的能量值；若所述信号的能量值 小于或者等于预设能量值，确定所述第二预设时频资源未被占用；或，若所述信号的能量值大于预设能量值，确定所述第二预设时频资源未被占用。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，在所述随机接入前导的第i次传输后的所述功率增加计数器的值用于确定所述随机接入前导的第i+1次的传输功率。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，在所述执行所述随机接入前导的第i次传输之后，所述方法还包括：若确定所述随机接入前导的第i次传输失败，将所述随机接入前导的传输次数计数器的值加1，所述传输次数计数器用于记录所述随机接入前导的传输次数。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，在所述将所述随机接入前导的传输次数计数器的值加1之后，所述方法还包括：若所述传输次数计数器的值小于或者等于所述随机接入前导的传输次数最大值，执行所述随机接入前导的第i+1次传输；或，若所述传输次数计数器的值大于所述传输次数最大值，确定随机接入过程失败。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，在所述确定随机接入过程失败之后，所述方法还包括：确定所述随机接入前导的接收小区为主小区；向所述主小区对应的网络设备发送无线资源控制(radio resource control，RRC)信令，所述RRC信令用于指示无线链路失败。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，所述方法还包括：确定用于传输所述随机接入前导的传输资源属于授权频段或非授权频段；若所述传输资源属于授权频段，将所述随机接入前导的传输次数最大值设置为第一值；或，若所述传输资源属于非授权频段，将所述传输次数最大值设置为第二值，所述第一值与所述第二值不同。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，所述第一值小于所述第二值。
结合第一方面及其上述实现方式，在第一方面的另一种实现方式中，所述方法还包括：接收网络设备发送的配置信息，所述配置信息包括所述第一值和/或第二值。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备中包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的preamble的非首次传输，若其与前一次传输所使 用的波束相同，即波束未发生改变，则将该preamble对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证power ramping不变。
第二方面，提供了一种用于传输随机接入前导的方法，该方法包括：确定用于传输随机接入前导的传输资源属于授权频段或非授权频段；若所述传输资源属于授权频段，将所述随机接入前导的传输次数最大值设置为第一值；或，若所述传输资源属于非授权频段，将所述传输次数最大值设置为第二值，所述第一值与所述第二值不同。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备可以根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
结合第二方面，在第二方面的一种实现方式中，所述第一值小于所述第二值。
结合第二方面及其上述实现方式，在第二方面的另一种实现方式中，所述方法还包括：接收网络设备发送的配置信息，所述配置信息包括所述第一值和/或第二值。
结合第二方面及其上述实现方式，在第二方面的另一种实现方式中，所述方法还包括：若所述随机接入前导的第i次传输失败，将所述随机接入前导的传输次数计数器的值加1，所述传输次数计数器用于记录所述随机接入前导的传输次数，i为正整数。
结合第二方面及其上述实现方式，在第二方面的另一种实现方式中，在所述将所述随机接入前导的传输次数计数器的值加1之后，所述方法还包括：若所述传输次数计数器的值小于或者等于所述传输次数最大值，执行所述随机接入前导的第i+1次传输；或，若所述传输次数计数器的值大于所述传输次数最大值，确定随机接入过程失败。
结合第二方面及其上述实现方式，在第二方面的另一种实现方式中，在 所述确定随机接入过程失败之后，所述方法还包括：确定所述随机接入前导的接收小区为主小区；向所述主小区对应的网络设备发送RRC信令，所述RRC信令用于指示无线链路失败。
结合第二方面及其上述实现方式，在第二方面的另一种实现方式中，所述方法还包括：确定所述传输资源中的第一资源是否被占用；若所述第一资源被占用，确定所述传输资源中除所述第一资源外的其他资源是否被占用；
若所述第一资源未被占用，使用所述第一资源执行所述随机接入前导的第i次传输。
结合第二方面及其上述实现方式，在第二方面的另一种实现方式中，在所述若所述第一资源被占用，确定所述传输资源中除所述第一资源外的其他资源是否被占用之后，所述方法还包括：若所述传输资源中不存在未被占用的资源，确定所述随机接入前导的第i次传输失败。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备可以根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
第三方面，提供了一种终端设备，用于执行上述第一方面或第一方面的任意可能的实现方式中的方法。具体地，该终端设备包括用于执行上述第一方面或第一方面的任意可能的实现方式中的方法的单元。
第四方面，提供了一种终端设备，用于执行上述第二方面或第二方面的任意可能的实现方式中的方法。具体地，该终端设备包括用于执行上述第二方面或第二方面的任意可能的实现方式中的方法的单元。
第五方面，提供了一种终端设备，包括：存储单元和处理器，该存储单元用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第一方面或第一方面的任意可能的实现方式中的方法。
第六方面，提供了一种终端设备，包括：存储单元和处理器，该存储单元用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第二方面或第二方面 的任意可能的实现方式中的方法。
第七方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的指令。
第八方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的指令。
第九方面，提供了一种包括指令的计算机程序产品，当计算机运行所述计算机程序产品的所述指时，所述计算机执行上述第一方面或第一方面的任意可能的实现方式中的用于传输随机接入前导的方法。具体地，该计算机程序产品可以运行于上述第三方面的终端设备上。
第十方面，提供了一种包括指令的计算机程序产品，当计算机运行所述计算机程序产品的所述指时，所述计算机执行上述第二方面或第二方面的任意可能的实现方式中的用于传输随机接入前导的方法。具体地，该计算机程序产品可以运行于上述第四方面的终端设备上。
附图说明
图1是根据本申请实施例的用于传输随机接入前导的方法的示意性流程图。
图2是根据本申请另一实施例的用于传输随机接入前导的方法的示意性流程图。
图3是根据本申请实施例的终端设备的示意性框图。
图4是根据本申请另一实施例的终端设备的示意性框图。
图5是根据本申请再一实施例的终端设备的示意性框图。
图6是根据本申请再一实施例的终端设备的示意性框图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(global system of mobile communication，GSMC)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division  multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来的第五代(5th generation，5G)系统或新无线(new radio，NR)等。
本申请实施例中的终端设备可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是GSMC系统或CDMA中的基站(base transceiver station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(evolutional NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等，本申请实施例并不限定。
图1示出了根据本申请实施例的用于传输随机接入前导的方法100的示意性流程图，该方法100可以由终端设备执行。如图1所示，该方法100包括：S110，执行该随机接入前导的第i次传输，i为大于1的正整数；S120，若该随机接入前导的第i次传输与第i-1次传输使用相同的波束，将该随机接入前导的功率增加计数器的值加1。
在本申请实施例中，终端设备在S110的执行随机接入前导(以下简称前导“preamble”)的第i次传输之前，该方法100还包括：终端设备确定用 于执行该preamble的传输资源。可选地，该用于传输preamble的传输资源可以属于授权频段，也可以属于非授权频段。若该传输资源属于授权频段，即终端设备根据网络设备配置的资源，执行该preamble的第i次传输。若该传输资源属于非授权频段，则终端设备可以根据预设条件，在至少一个预设时频资源中确定第一预设时频资源，该第一预设时频资源用于preamble的第i次传输，其中，该预设条件可以为先听后做(listen before talk，LBT)。
可选地，作为一个实施例，对于使用非授权频段执行preamble的第i次传输，终端设备确定可以用于传输preamble的至少一个预设时频资源，该至少一个预设时频资源属于非授权频段，终端设备在该至少一个预设时频资源中确定用于preamble的第i次传输的第一预设时频资源。具体地，以该该至少一个预设时频资源中的第二预设时频资源为例，终端设备确定该第二预设时频资源是否被占用，若该第二预设时频资源未被占用，则将该第二预设时频资源确定为用于执行preamble的第i次传输的第一预设时频资源；若该第二预设时频资源被占用，则继续在该至少一个预设时频资源中确定其他预设时频资源是否被占用，直到找到未被占用的预设时频资源，并将该未被占用的预设时频资源确定为第一预设时频资源，其中，该其他预设时频资源不包括第二预设时频资源。
应理解，若终端设备在该至少一个预设时频资源中未检测到空闲的预设时频资源，即该至少一个预设时频资源当前均被占用，则终端设备可以认为该preamble的第i次传输失败。可选地，若终端设备确定继续执行第i+1次传输，则可以采用其他资源执行，或者，在一段时间之后，再次检测该至少一个预设时频资源中是否存在未被占用的预设时频资源，并采用该未被占用的预设时频资源执行该i+1次传输。
应理解，可以通过多种方式确定该至少一个预设时频资源中任意一个预设时频资源是否被占用，例如，这里以第二预设时频资源为例，可以通过确定该第二预设时频资源中信号的能量，进而确定该第二预设时频资源是否被占用。具体地，终端设备可以检测并确定该第二预设时频资源承载的信号的能量值，若该信号的能量值小于或者等于预设能量值，则确定该第二预设时频资源未被占用；若该信号的能量值大于该预设能量值，则确定该第二预设时频资源已被占用。可选地，该预设能量值可以根据实际应用进行设置，本申请实施例并不限于此。
在本申请实施例中，终端设备确定用于传输preamble的传输资源，并通过该传输资源执行该preamble的第i次传输，在S120中，若该preamble的第i次传输使用的波束与第i-1次传输使用的波束相同，也就是前后两次传输preamble的波束相同，则将该preamble对应的功率增加计数器(PREAMBLE_POWER_RAMPING_COUNTER)的值加1。其中，本申请实施例中的preamble的第i次传输为非首次传输，即该i的值为大于1的正整数，在该第i次传输之前存在该preamble的第i-1次传输。
可选地，终端设备可以通过该preamble对应的前导传输次数计数器(PREAMBLE_TRANSMISSION_COUNTER)确定该第i次传输是否为非首次传输。将PREAMBLE_TRANSMISSION_COUNTER的初始值设置为1，之后每经过一次preamble的传输失败，则将该PREAMBLE_TRANSMISSION_COUNTER的值加1，因此，当该PREAMBLE_TRANSMISSION_COUNTER的值大于1时，即表示该第i次传输为非首次传输。
应理解，终端设备确定preamble的第i次传输使用的波束与第i-1次传输使用的波束相同，可以包括：若该preamble的第i次传输和第i-1次传输使用相同的同步信号块(synchronous signal block，SS block)，即该SS block未发生改变，则可以确定该preamble的第i次传输使用的波束与第i-1次传输使用的波束相同，即在第i次传输中终端设备发送preamble采用的发送波束与第i-1次传输中终端设备发送preamble采用的发送波束相同，未发生波束转换(beam switching)，则该终端设备可以在该preamble第i次传输后，将对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1。
对应的，若该该preamble的第i次传输使用的波束与第i-1次传输使用的波束不同，即在第i次传输中终端设备发送preamble采用的发送波束与第i-1次传输中终端设备发送preamble采用的发送波束不同，则该preamble的第i次传输后对应的PREAMBLE_POWER_RAMPING_COUNTER的值保持不变。
在本申请实施例中，在S120中，终端设备确定preamble的第i次传输使用的波束与第i-1次传输使用的波束相同，则将对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1，进一步还可以包括：若终端设备确定preamble的第i次传输使用的波束与第i-1次传输使用的波束相同，且 该终端设备确定无需暂停该PREAMBLE_POWER_RAMPING_COUNTER，则将该PREAMBLE_POWER_RAMPING_COUNTER的值加1，否则保持不变。具体地，终端设备的MAC实体可以根据下层的指示，暂停该PREAMBLE_POWER_RAMPING_COUNTER，使得该PREAMBLE_POWER_RAMPING_COUNTER保持不变；若在preamble的第i次传输之后，终端设备未收到该指示，或者收到指示为不暂停该PREAMBLE_POWER_RAMPING_COUNTER，则终端设备在preamble的第i次传输使用的波束与第i-1次传输使用的波束相同的情况下，将该preamble的第i次传输后对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1。
在本申请实施例中，该PREAMBLE_POWER_RAMPING_COUNTER的值可以用于确定终端设备发送preamble的传输功率。具体地，终端设备在执行preamble的第i次传输后，若该第i次传输失败，终端设备可以确定是否执行该preamble的第i+1次传输，若执行，则在该第i+1次传输时，终端设备发送该preamble的功率可以根据在执行preamble的第i+1次传输后确定的对应的PREAMBLE_POWER_RAMPING_COUNTER的值确定。
可选地，该第i+1次传输时，终端设备发送该preamble的功率PREAMBLE_RECEIVED_TARGET_POWER可以通过下面的公式确定：
PREAMBLE_RECEIVED_TARGET_POWER
＝ra-Preamble Initial Received Target Power+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER–1)*
其中，ra-Preamble Initial Received Target Power、DELTA_PREAMBLE以及power Ramping Step均为预配置的参数，PREAMBLE_POWER_RAMPING_COUNTER表示终端设备在执行preamble的第i+1次传输后确定的对应的PREAMBLE_POWER_RAMPING_COUNTER的值。
在本申请实施例中，终端设备在执行preamble的第i次传输后，可以根据该终端设备是否成功接收到RAR，以及根据是否竞争成功，确定该第i次传输是否失败。具体地，终端设备执行preamble的第i次传输时，向网络设备发送preamble，即msg1，该preamble可以为通过随机选择确定的，网络设备根据接收到的preamble，向终端设备发送RAR，即msg2。若终端设备在RAR窗口(window)内未能成功接收到RAR，则确定该preamble的 第i次传输失败，例如，终端设备向网络设备发送preamble失败，或者网络设备向终端设备发送RAR失败等，都会导致该终端设备未能在RAR window内接收到RAR。
再例如，对于采用非授权传输资源执行该preamble的第i次传输，若网络设备一直无法确定可以用于传输msg2的资源，例如网络设备多次执行LBT，检测的传输资源均已被占用，也可能导致该终端设备在RAR window内无法接收到msg2，进而导致终端设备确定该preamble的第i次传输失败。
应理解，该RAR window可以根据实际应用设置时长，本申请实施例对此不作限定。
可选地，若终端设备竞争失败，则该终端设备的preamble的第i次传输失败。具体是，当终端设备接收到网络设备发送的msg2，则向网络设备发送msg3，通过该msg3发送RRC连接请求(Connection Request)，其中，该msg3包括终端设备的标识，网络设备根据该msg3向终端设备发送msg4，该msg4也包括终端设备的标识。当同时存在多个终端设备向网络设备发送相同的preamble时，网络设备接收该多个终端设备发送的msg3，每个msg3包括对应终端设备的标识，网络设备在该多个终端设备中确定一个终端设备，并向该终端设备发送msg4，该msg4包括该终端设备的标识，以便于多个终端设备根据接收到msg4确定是否竞争成功，若终端设备在msg4中确定了自身的标识信息，则竞争成功，若该终端设备在msg4中未确定自身的标识，则该终端设备竞争失败。
在本申请实施例中，若终端设备执行preamble的第i次传输失败，可以根据该preamble对应的PREAMBLE_TRANSMISSION_COUNTER的值，确定是否执行该preamble的第i+1次传输。具体地，终端设备可以通过该PREAMBLE_TRANSMISSION_COUNTER记录传输preamble的次数，并且在该PREAMBLE_TRANSMISSION_COUNTER的值达到传输次数最大值时，确定该随机接入过程失败。
具体地，当终端设备执行preamble的第i次传输失败时，将该preamble对应的PREAMBLE_TRANSMISSION_COUNTER的值加1，此时，若对应的PREAMBLE_TRANSMISSION_COUNTER的值小于或者等于传输次数最大值，则终端设备继续执行第i+1次preamble传输；若对应的PREAMBLE_TRANSMISSION_COUNTER的值大于传输次数最大值，则终 端设备确定随机接入过程失败。
在本申请实施例中，在终端设备的随机接入过程失败后，终端设备可以确定该preamble传输所在的小区是否为主小区，若为主小区，则终端设备向该主小区对应的网络设备发送RRC信令，该RRC信令用于指示无线链路失败(radio link failure)；若不是主小区，而是辅小区，则无需发送该RRC信令。可选地，该主小区可以包括终端设备连接的主基站的主小区，或该终端设备连接的辅基站的主小区；该辅小区可以包括终端设备连接的主基站的辅小区，或该终端设备连接的辅基站的辅小区，本申请实施例并不限于此。
在本申请实施例中，该preamble的传输次数最大值可以根据实际应用进行设置，例如，可以设置为某一固定值，或者根据网络设备的配置确定该传输次数最大值。可选地，终端设备可以根据传输preamble的资源所在的频带是否为授权频段设置该传输次数最大值。
具体地，若用于传输preamble的资源属于授权频段，则终端设备将preamble的传输次数最大值设置为第一值；若用于传输preamble的资源属于非授权频段，则终端设备将preamble的传输次数最大值设置为第二值，该第一值与第二值不同。
可选地，考虑到对于非授权频段，终端设备需要在对应的预设时频资源上执行LBT，以确定未被占用的资源来执行preamble的传输；对应的，网络设备也需要在对应的预设时频资源上执行LBT，以确定未被占用的资源来执行与preamble对应的RAR的传输，因此，这将增加终端设备在RARwindow内无法接收到RAR的概率。但是，终端设备可以根据传输preamble的资源是否属于非授权频段设置preamble的传输次数最大值，将非授权频段对应的第二值设置为大于授权频段对应的第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
可选地，终端设备确定第一值与第二值，包括：终端设备接收网络设备发送的配置信息，该配置信息包括该第一值和/或第二值，但本申请实施例并不限于此。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备中包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的preamble的非首次传输，若其与前一次传输所使用的波束相同，即波束未发生改变，则将该preamble对应的 PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证power ramping不变。
图2示出了根据本申请另一实施例的用于传输随机接入前导的方法200的示意性流程图，该方法200可以由终端设备执行。如图2所示，该方法200包括：S210，确定用于传输随机接入前导的传输资源属于授权频段或非授权频段；S220，若该传输资源属于授权频段，将该随机接入前导的传输次数最大值设置为第一值；S230，若该传输资源属于非授权频段，将该传输次数最大值设置为第二值，该第一值与该第二值不同。
在本申请实施例中，考虑到对于终端设备使用非授权频段的资源传输preamble时，终端设备需要在对应的传输资源上执行LBT，以确定未被占用的资源来执行preamble的传输；对应的，网络设备也需要在对应的传输资源上执行LBT，以确定未被占用的资源来执行与preamble对应的RAR的传输，因此，终端设备与网络设备的LBT会增加传输时长，进而增加了终端设备在RAR window内无法接收到RAR的概率。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备可以根据传输preamble的资源是否属于非授权频段设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
在本申请实施例中，终端设备包括用于记录preamble的传输次数的传输次数计数器(PREAMBLE_TRANSMISSION_COUNTER)。具体地，终端设备将该PREAMBLE_TRANSMISSION_COUNTER的初始值设置为1，之后，当终端设备执行preamble的第i次传输失败时，则将该PREAMBLE_TRANSMISSION_COUNTER的值加1，其中，i为正整数。
在本申请实施例中，若终端设备执行preamble的第i次传输失败，可以根据该preamble对应的PREAMBLE_TRANSMISSION_COUNTER的值，确定是否执行该preamble的第i+1次传输。具体地，终端设备可以通过该PREAMBLE_TRANSMISSION_COUNTER记录传输preamble的次数，在该 PREAMBLE_TRANSMISSION_COUNTER的值达到传输次数最大值时，确定该随机接入过程失败，其中，该传输次数最大值可以为第一值或第二值。
具体地，当终端设备执行preamble的第i次传输失败时，将该preamble对应的PREAMBLE_TRANSMISSION_COUNTER的值加1，此时，若对应的PREAMBLE_TRANSMISSION_COUNTER的值小于或者等于传输次数最大值，则终端设备继续执行第i+1次preamble传输；若对应的PREAMBLE_TRANSMISSION_COUNTER的值大于传输次数最大值，则终端设备确定随机接入过程失败。
在本申请实施例中，终端设备可以根据传输preamble是否属于非授权频段，确定preamble的传输次数最大值为第一值或第二值。具体地，该第一值和第二值可以根据实际应用设置，或者，该终端设备可以接收网络设备发送的配置信息，该配置信息包括该第一值和/或第二值，则终端设备根据该配置信息确定该第一值和第二值，本申请实施例并不限于此。
应理解，终端设备在执行preamble的第i次传输之前，该方法200还包括：在用于传输preamble的传输资源中确定用于执行第i次传输的资源。具体地，对于授权资源，终端设备采用该授权资源执行该第i次的preamble传输。
可选地，对于非授权传输资源，终端设备在该非授权传输资源中通过LBT确定可以用于执行preamble的第i次传输的资源。具体地，终端设备在非授权传输资源中确定第一资源是否被占用，若该第一资源未被占用，则使用该第一资源执行preamble的第i次传输；若该第一资源被占用，则在该非授权资源中继续确定除第一资源外的其他资源是否被占用，直到确定了未被占用的资源，并采用该未被占用的资源执行preamble的第i次传输。
应理解，若终端设备在全部非授权传输资源中未检测到空闲的资源，即该全部非授权传输资源当前均被占用，则终端设备可以认为该preamble的第i次传输失败。可选地，若终端设备确定继续执行第i+1次传输，则可以采用其他资源执行，或者，在一段时间之后，再次检测该非授权传输资源中是否存在未被占用的时频资源，并采用该未被占用的时频资源执行该i+1次传输。
应理解，可以通过多种方式确定该非授权传输资源中任意一个时频资源是否被占用，例如，这里以第一资源为例，可以通过确定该第一资源中信号 的能量，进而确定该第一资源是否被占用。具体地，终端设备可以检测并确定该第一资源承载的信号的能量值，若该信号的能量值小于或者等于预设能量值，则确定该第一资源未被占用；若该信号的能量值大于该预设能量值，则确定该第一资源已被占用。可选地，该预设能量值可以根据实际应用进行设置，本申请实施例并不限于此。
在本申请实施例中，终端设备在执行preamble的第i次传输后，还可以根据该终端设备是否成功接收到RAR，以及根据是否竞争成功，确定该第i次传输是否失败。具体地，终端设备执行preamble的第i次传输时，向网络设备发送preamble，即msg1，该preamble可以为通过随机选择确定的，网络设备根据接收到的preamble，向终端设备发送RAR，即msg2。若终端设备在RAR窗口(window)内未能成功接收到RAR，则确定该preamble的第i次传输失败。例如，终端设备向网络设备发送preamble失败，或者网络设备向终端设备发送RAR失败等，都会导致该终端设备未能在RAR window内接收到RAR。
再例如，对于采用非授权传输资源执行该preamble的第i次传输，若网络设备一直无法确定可以用于传输msg2的资源，例如网络设备多次执行LBT，检测的传输资源均已被占用，也可能导致该终端设备在RAR window内无法接收到msg2，进而导致终端设备确定该preamble的第i次传输失败。
应理解，该RAR window可以根据实际应用设置时长，本申请实施例对此不作限定。
可选地，对于终端设备竞争失败，该终端设备也可以确定该preamble的第i次传输失败。具体是，当终端设备接收到网络设备发送的msg2，则向网络设备发送msg3，通过该msg3发送RRC连接请求(Connection Request)，其中，该msg3包括终端设备的标识，网络设备根据该msg3向终端设备发送msg4，该msg4也包括终端设备的标识。当同时存在多个终端设备向网络设备发送相同的preamble时，网络设备接收该多个终端设备发送的msg3，每个msg3包括对应终端设备的标识，网络设备在该多个终端设备中确定一个终端设备，并向该终端设备发送msg4，该msg4包括该终端设备的标识，以便于多个终端设备根据接收到msg4确定是否竞争成功，若终端设备在msg4中确定了自身的标识信息，则竞争成功，若该终端设备在msg4中未确定自身的标识，则该终端设备竞争失败。
综上，对于非授权传输资源执行preamble传输，终端设备确定该preamble传输失败的概率大于授权资源传输preamble的概率，因此，可以在非授权传输资源传输preamble时，将对应的preamble传输次数最大值设置为较大的第二值，而在授权传输资源传输preamble时，将对应的preamble传输次数最大值设置为较小的第一值。
在本申请实施例中，在终端设备根据PREAMBLE_TRANSMISSION_COUNTER的值，确定随机接入过程失败后，终端设备可以确定该preamble传输所在的小区是否为主小区，若为主小区，则终端设备向该主小区对应的网络设备发送RRC信令，该RRC信令用于指示无线链路失败(radio link failure)；若不是主小区，而是辅小区，则无需发送该RRC信令。可选地，该主小区可以包括终端设备连接的主基站的主小区，或该终端设备连接的辅基站的主小区；该辅小区可以包括终端设备连接的主基站的辅小区，或该终端设备连接的辅基站的辅小区，本申请实施例并不限于此。
因此，本申请实施例的用于传输随机接入前导的方法，终端设备可以根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
另外，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
上文中结合图1至图2，详细描述了根据本申请实施例的用于传输随机接入前导的方法，下面将结合图3至图6，描述根据本申请实施例的终端设备。
如图3所示，根据本申请实施例的终端设备300包括：收发单元310和处理单元320，可选的，还可以包括确定单元330。
具体地，该收发单元310用于：执行该随机接入前导的第i次传输，i为大于1的正整数；该处理单元320用于：若该随机接入前导的第i次传输与第i-1次传输使用相同的波束，将该随机接入前导的功率增加计数器的值加1。
因此，本申请实施例的终端设备，包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的preamble的非首次传输，若其与前一次传输所使用的波束相同，即波束未发生改变，则将该preamble对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证power ramping不变。
可选地，确定单元330用于：在该处理单元320将该随机接入前导的功率增加计数器的值加1之前，确定无需暂停该的功率增加计数器。
可选地，该确定单元330用于：若该随机接入前导的第i次传输与第i-1次传输的使用相同的同步信号块，确定该随机接入前导的第i次传输与第i-1次传输使用的波束相同。
可选地，该确定单元330用于：在该收发单元310执行该随机接入前导的第i次传输之前，在至少一个预设时频资源中确定第一预设时频资源，该第一预设时频资源用于该随机接入前导的第i次传输。
可选地，该确定单元330具体用于：确定该至少一个预设时频资源中的第二预设时频资源是否被占用；若该第二预设时频资源未被占用，将该第二预设时频资源确定为该第一预设时频资源；或，若该第二预设时频资源被占用，确定该至少一个预设时频资源中除该第二预设时频资源外的其它预设时频资源是否被占用。
可选地，该确定单元330具体用于：确定该第二预设时频资源承载的信号的能量值；若该信号的能量值小于或者等于预设能量值，确定该第二预设时频资源未被占用；或，若该信号的能量值大于预设能量值，确定该第二预设时频资源未被占用。
可选地，在该随机接入前导的第i次传输后的该功率增加计数器的值用于确定该随机接入前导的第i+1次的传输功率。
可选地，该处理单元320具体用于：在该收发单元310执行该随机接入前导的第i次传输之后，若确定该随机接入前导的第i次传输失败，将该随机接入前导的传输次数计数器的值加1，该传输次数计数器用于记录该随机接入前导的传输次数。
可选地，该收发单元310具体用于：在该处理单元320将该随机接入前导的传输次数计数器的值加1之后，若该传输次数计数器的值小于或者等于该随机接入前导的传输次数最大值，执行该随机接入前导的第i+1次传输；或，若该传输次数计数器的值大于该传输次数最大值，确定随机接入过程失败。
可选地，该确定单元330用于：在该确定单元330确定随机接入过程失败之后，确定该随机接入前导的接收小区为主小区；该收发单元310具体用于：向该主小区对应的网络设备发送RRC信令，该RRC信令用于指示无线链路失败。
可选地，该确定单元330用于：确定用于传输该随机接入前导的传输资源属于授权频段或非授权频段；该处理单元320具体用于：若该传输资源属于授权频段，将该随机接入前导的传输次数最大值设置为第一值；或，若该传输资源属于非授权频段，将该传输次数最大值设置为第二值，该第一值与该第二值不同。
可选地，该第一值小于该第二值。
可选地，该收发单元310具体用于：接收网络设备发送的配置信息，该配置信息包括该第一值和/或第二值。
应理解，根据本申请实施例的终端设备300可对应于执行本申请实施例中的方法100，并且终端设备300中的各个单元的上述和其它操作和/或功能分别为了实现图1中的方法的终端设备相应流程，为了简洁，在此不再赘述。
因此，本申请实施例的终端设备，包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的preamble的非首次传输，若其与前一次传输所使用的波束相同，即波束未发生改变，则将该preamble对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证 power ramping不变。
如图4所示，根据本申请实施例的终端设备400包括：确定单元410和处理单元420，可选的，还可以包括收发单元430。
具体地，该确定单元410用于：确定用于传输随机接入前导的传输资源属于授权频段或非授权频段；该处理单元420用于：若该传输资源属于授权频段，将该随机接入前导的传输次数最大值设置为第一值；该处理单元420还用于：若该传输资源属于非授权频段，将该传输次数最大值设置为第二值，该第一值与该第二值不同。
因此，本申请实施例的终端设备，根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
可选的，该第一值小于该第二值。
可选的，该收发单元430用于：接收网络设备发送的配置信息，该配置信息包括该第一值和/或第二值。
可选的，该处理单元420具体用于：若该随机接入前导的第i次传输失败，将该随机接入前导的传输次数计数器的值加1，该传输次数计数器用于记录该随机接入前导的传输次数，i为正整数。
可选的，该处理单元420具体用于：在将该随机接入前导的传输次数计数器的值加1之后，若该传输次数计数器的值小于或者等于该传输次数最大值，执行该随机接入前导的第i+1次传输；或，若该传输次数计数器的值大于该传输次数最大值，确定随机接入过程失败。
可选的，该确定单元410具体用于：在该确定随机接入过程失败之后，确定该随机接入前导的接收小区为主小区；该收发单元430用于：向该主小区对应的网络设备发送RRC信令，该RRC信令用于指示无线链路失败。
可选的，该确定单元410具体用于：确定该传输资源中的第一资源是否被占用；若该第一资源被占用，确定该传输资源中除该第一资源外的其他资源是否被占用；或，若该第一资源未被占用，使用该第一资源执行该随机接入前导的第i次传输。
可选的，该确定单元410具体用于：在若该第一资源被占用，确定该传 输资源中除该第一资源外的其他资源是否被占用之后，若该传输资源中不存在未被占用的资源，确定该随机接入前导的第i次传输失败。
应理解，根据本申请实施例的终端设备400可对应于执行本申请实施例中的方法200，并且终端设备400中的各个单元的上述和其它操作和/或功能分别为了实现图2中的方法的终端设备相应流程，为了简洁，在此不再赘述。
可选的，该终端设备400可以为本申请实施例的终端设备300，但本申请实施例并不限于此。
因此，本申请实施例的终端设备，根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
图5示出了根据本申请实施例的终端设备500的示意性框图，如图5所示，该终端设备500包括：处理器510和收发器520，处理器510和收发器520相连，可选地，该终端设备500还包括存储器530，存储器530与处理器510相连。其中，处理器510、存储器530和收发器520之间通过内部连接通路互相通信，传递和/或控制数据信号，该存储器530可以用于存储指令，该处理器510用于执行该存储器530存储的指令，以控制收发器520发送信息或信号，该收发器520用于：执行该随机接入前导的第i次传输，i为大于1的正整数；该处理器510用于：若该随机接入前导的第i次传输与第i-1次传输使用相同的波束，将该随机接入前导的功率增加计数器的值加1。
因此，本申请实施例的终端设备，包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的preamble的非首次传输，若其与前一次传输所使用的波束相同，即波束未发生改变，则将该preamble对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证power ramping不变。
可选地，作为一个实施例，该处理器510用于：在将该随机接入前导的功率增加计数器的值加1之前，确定无需暂停该的功率增加计数器。
可选地，作为一个实施例，该处理器510用于：若该随机接入前导的第i次传输与第i-1次传输的使用相同的同步信号块，确定该随机接入前导的第i次传输与第i-1次传输使用的波束相同。
可选地，作为一个实施例，该处理器510用于：在该收发器520执行该随机接入前导的第i次传输之前，在至少一个预设时频资源中确定第一预设时频资源，该第一预设时频资源用于该随机接入前导的第i次传输。
可选地，作为一个实施例，该处理器510用于：确定该至少一个预设时频资源中的第二预设时频资源是否被占用；若该第二预设时频资源未被占用，将该第二预设时频资源确定为该第一预设时频资源；或，若该第二预设时频资源被占用，确定该至少一个预设时频资源中除该第二预设时频资源外的其它预设时频资源是否被占用。
可选地，作为一个实施例，该处理器510用于：确定该第二预设时频资源承载的信号的能量值；若该信号的能量值小于或者等于预设能量值，确定该第二预设时频资源未被占用；或，若该信号的能量值大于预设能量值，确定该第二预设时频资源未被占用。
可选地，作为一个实施例，在该随机接入前导的第i次传输后的该功率增加计数器的值用于确定该随机接入前导的第i+1次的传输功率。
可选地，作为一个实施例，该处理器510用于：在该收发器520执行该随机接入前导的第i次传输之后，若确定该随机接入前导的第i次传输失败，将该随机接入前导的传输次数计数器的值加1，该传输次数计数器用于记录该随机接入前导的传输次数。
可选地，作为一个实施例，该收发器520具体用于：在该处理器510将该随机接入前导的传输次数计数器的值加1之后，若该传输次数计数器的值小于或者等于该随机接入前导的传输次数最大值，执行该随机接入前导的第i+1次传输；或，若该传输次数计数器的值大于该传输次数最大值，确定随机接入过程失败。
可选地，作为一个实施例，该处理器510用于：在确定随机接入过程失败之后，确定该随机接入前导的接收小区为主小区；该收发器520用于：向该主小区对应的网络设备发送RRC信令，该RRC信令用于指示无线链路失败。
可选地，作为一个实施例，该处理器510用于：确定用于传输该随机接 入前导的传输资源属于授权频段或非授权频段；若该传输资源属于授权频段，将该随机接入前导的传输次数最大值设置为第一值；或，若该传输资源属于非授权频段，将该传输次数最大值设置为第二值，该第一值与该第二值不同。
可选地，作为一个实施例，该第一值小于该第二值。
可选地，作为一个实施例，该收发器520具体用于：接收网络设备发送的配置信息，该配置信息包括该第一值和/或第二值。
应理解，根据本申请实施例的终端设备500可对应于本申请实施例中的终端设备300，并可以对应于执行根据本申请实施例的方法100中的相应主体，并且终端设备500中的各个单元的上述和其它操作和/或功能分别为了实现图1中的各个方法中终端设备的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例的终端设备，包括用于记录power ramping的PREAMBLE_POWER_RAMPING_COUNTER，并且，对于终端设备执行的preamble的非首次传输，若其与前一次传输所使用的波束相同，即波束未发生改变，则将该preamble对应的PREAMBLE_POWER_RAMPING_COUNTER的值加1；若波束发生改变，则PREAMBLE_POWER_RAMPING_COUNTER的值保持不变，即终端设备的该PREAMBLE_POWER_RAMPING_COUNTER，支持在preamble传输过程中发生波束转换时，保证power ramping不变。
图6示出了根据本申请实施例的终端设备600的示意性框图，如图6所示，该终端设备600包括：处理器610和收发器620，处理器610和收发器620相连，可选地，该终端设备600还包括存储器630，存储器630与处理器610相连。其中，处理器610、存储器630和收发器620之间通过内部连接通路互相通信，传递和/或控制数据信号，该存储器630可以用于存储指令，该处理器610用于执行该存储器630存储的指令，以控制收发器620发送信息或信号，该处理器610用于：确定用于传输随机接入前导的传输资源属于授权频段或非授权频段；若该传输资源属于授权频段，将该随机接入前导的传输次数最大值设置为第一值；若该传输资源属于非授权频段，将该传输次数最大值设置为第二值，该第一值与该第二值不同。
因此，本申请实施例的终端设备，根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传 输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
可选的，作为一个实施例，该第一值小于该第二值。
可选的，作为一个实施例，该收发器620用于：接收网络设备发送的配置信息，该配置信息包括该第一值和/或第二值。
可选的，作为一个实施例，该处理器610用于：若该随机接入前导的第i次传输失败，将该随机接入前导的传输次数计数器的值加1，该传输次数计数器用于记录该随机接入前导的传输次数，i为正整数。
可选的，作为一个实施例，该处理器610用于：在将该随机接入前导的传输次数计数器的值加1之后，若该传输次数计数器的值小于或者等于该传输次数最大值，执行该随机接入前导的第i+1次传输；或，若该传输次数计数器的值大于该传输次数最大值，确定随机接入过程失败。
可选的，作为一个实施例，该处理器610用于：在该确定随机接入过程失败之后，确定该随机接入前导的接收小区为主小区；该收发器620用于：向该主小区对应的网络设备发送RRC信令，该RRC信令用于指示无线链路失败。
可选的，作为一个实施例，该处理器610用于：确定该传输资源中的第一资源是否被占用；若该第一资源被占用，确定该传输资源中除该第一资源外的其他资源是否被占用；或，若该第一资源未被占用，使用该第一资源执行该随机接入前导的第i次传输。
可选的，作为一个实施例，该处理器610用于：在若该第一资源被占用，确定该传输资源中除该第一资源外的其他资源是否被占用之后，若该传输资源中不存在未被占用的资源，确定该随机接入前导的第i次传输失败。
应理解，根据本申请实施例的终端设备600可对应于本申请实施例中的终端设备400，并可以对应于执行根据本申请实施例的方法200中的相应主体，并且终端设备600中的各个单元的上述和其它操作和/或功能分别为了实现图2中的各个方法中终端设备的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例的终端设备，根据传输preamble的资源是否属于非授权频段，设置preamble的传输次数最大值，若属于授权资源，对应的将传输次数最大值设置为第一值；若属于非授权频段，对应的将传输次数最大值 设置为第二值，且第一值与第二值不同，例如将第二值设置为大于第一值，以减少由于LBT失败导致的终端设备确定随机接入过程失败的概率。
应注意，本申请上述方法实施例可以应用于处理器中，或者由处理器实现。处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integratedcircuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable rom，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元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。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (42)

  1. 一种用于传输随机接入前导的方法，其特征在于，包括：
    执行所述随机接入前导的第i次传输，i为大于1的正整数；
    若所述随机接入前导的第i次传输与第i-1次传输使用相同的波束，将所述随机接入前导的功率增加计数器的值加1。
  2. 根据权利要求1所述的方法，其特征在于，在所述将所述随机接入前导的功率增加计数器的值加1之前，所述方法还包括：
    确定无需暂停所述的功率增加计数器。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    若所述随机接入前导的第i次传输与第i-1次传输的使用相同的同步信号块，确定所述随机接入前导的第i次传输与第i-1次传输使用的波束相同。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，在所述执行所述随机接入前导的第i次传输之前，所述方法还包括：
    在至少一个预设时频资源中确定第一预设时频资源，所述第一预设时频资源用于所述随机接入前导的第i次传输。
  5. 根据权利要求4所述的方法，其特征在于，所述在至少一个预设时频资源中确定第一预设时频资源，包括：
    确定所述至少一个预设时频资源中的第二预设时频资源是否被占用；
    若所述第二预设时频资源未被占用，将所述第二预设时频资源确定为所述第一预设时频资源；或
    若所述第二预设时频资源被占用，确定所述至少一个预设时频资源中除所述第二预设时频资源外的其它预设时频资源是否被占用。
  6. 根据权利要求4或5所述的方法，其特征在于，所述确定所述至少一个预设时频资源中的第二预设时频资源是否被占用，包括：
    确定所述第二预设时频资源承载的信号的能量值；
    若所述信号的能量值小于或者等于预设能量值，确定所述第二预设时频资源未被占用；或
    若所述信号的能量值大于预设能量值，确定所述第二预设时频资源未被占用。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，在所述随机接入前导的第i次传输后的所述功率增加计数器的值用于确定所述随机接 入前导的第i+1次的传输功率。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，在所述执行所述随机接入前导的第i次传输之后，所述方法还包括：
    若确定所述随机接入前导的第i次传输失败，将所述随机接入前导的传输次数计数器的值加1，所述传输次数计数器用于记录所述随机接入前导的传输次数。
  9. 根据权利要求8所述的方法，其特征在于，在所述将所述随机接入前导的传输次数计数器的值加1之后，所述方法还包括：
    若所述传输次数计数器的值小于或者等于所述随机接入前导的传输次数最大值，执行所述随机接入前导的第i+1次传输；或
    若所述传输次数计数器的值大于所述传输次数最大值，确定随机接入过程失败。
  10. 根据权利要求9所述的方法，其特征在于，在所述确定随机接入过程失败之后，所述方法还包括：
    确定所述随机接入前导的接收小区为主小区；
    向所述主小区对应的网络设备发送无线资源控制RRC信令，所述RRC信令用于指示无线链路失败。
  11. 根据权利要求8至10中任一项所述的方法，其特征在于，所述方法还包括：
    确定用于传输所述随机接入前导的传输资源属于授权频段或非授权频段；
    若所述传输资源属于授权频段，将所述随机接入前导的传输次数最大值设置为第一值；或
    若所述传输资源属于非授权频段，将所述传输次数最大值设置为第二值，所述第一值与所述第二值不同。
  12. 根据权利要求11所述的方法，其特征在于，所述第一值小于所述第二值。
  13. 根据权利要求11或12所述的方法，其特征在于，所述方法还包括：
    接收网络设备发送的配置信息，所述配置信息包括所述第一值和/或第二值。
  14. 一种用于传输随机接入前导的方法，其特征在于，包括：
    确定用于传输随机接入前导的传输资源属于授权频段或非授权频段；
    若所述传输资源属于授权频段，将所述随机接入前导的传输次数最大值设置为第一值；或
    若所述传输资源属于非授权频段，将所述传输次数最大值设置为第二值，所述第一值与所述第二值不同。
  15. 根据权利要求14所述的方法，其特征在于，所述第一值小于所述第二值。
  16. 根据权利要求14或15所述的方法，其特征在于，所述方法还包括：
    接收网络设备发送的配置信息，所述配置信息包括所述第一值和/或第二值。
  17. 根据权利要求14至16中任一项所述的方法，其特征在于，所述方法还包括：
    若所述随机接入前导的第i次传输失败，将所述随机接入前导的传输次数计数器的值加1，所述传输次数计数器用于记录所述随机接入前导的传输次数，i为正整数。
  18. 根据权利要求17所述的方法，其特征在于，在所述将所述随机接入前导的传输次数计数器的值加1之后，所述方法还包括：
    若所述传输次数计数器的值小于或者等于所述传输次数最大值，执行所述随机接入前导的第i+1次传输；或
    若所述传输次数计数器的值大于所述传输次数最大值，确定随机接入过程失败。
  19. 根据权利要求18所述的方法，其特征在于，在所述确定随机接入过程失败之后，所述方法还包括：
    确定所述随机接入前导的接收小区为主小区；
    向所述主小区对应的网络设备发送无线资源控制RRC信令，所述RRC信令用于指示无线链路失败。
  20. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    确定所述传输资源中的第一资源是否被占用；
    若所述第一资源被占用，确定所述传输资源中除所述第一资源外的其他资源是否被占用；或
    若所述第一资源未被占用，使用所述第一资源执行所述随机接入前导的 第i次传输。
  21. 根据权利要求20所述的方法，其特征在于，在所述若所述第一资源被占用，确定所述传输资源中除所述第一资源外的其他资源是否被占用之后，所述方法还包括：
    若所述传输资源中不存在未被占用的资源，确定所述随机接入前导的第i次传输失败。
  22. 一种终端设备，其特征在于，包括：
    收发单元，用于执行所述随机接入前导的第i次传输，i为大于1的正整数；
    处理单元，用于若所述随机接入前导的第i次传输与第i-1次传输使用相同的波束，将所述随机接入前导的功率增加计数器的值加1。
  23. 根据权利要求22所述的终端设备，其特征在于，所述终端设备还包括：
    确定单元，用于在所述处理单元将所述随机接入前导的功率增加计数器的值加1之前，确定无需暂停所述的功率增加计数器。
  24. 根据权利要求22或23所述的终端设备，其特征在于，所述终端设备还包括：
    确定单元，用于若所述随机接入前导的第i次传输与第i-1次传输的使用相同的同步信号块，确定所述随机接入前导的第i次传输与第i-1次传输使用的波束相同。
  25. 根据权利要求22至24中任一项所述的终端设备，其特征在于，所述终端设备还包括：
    确定单元，用于在所述收发单元执行所述随机接入前导的第i次传输之前，在至少一个预设时频资源中确定第一预设时频资源，所述第一预设时频资源用于所述随机接入前导的第i次传输。
  26. 根据权利要求25所述的终端设备，其特征在于，所述确定单元具体用于：
    确定所述至少一个预设时频资源中的第二预设时频资源是否被占用；
    若所述第二预设时频资源未被占用，将所述第二预设时频资源确定为所述第一预设时频资源；或
    若所述第二预设时频资源被占用，确定所述至少一个预设时频资源中除 所述第二预设时频资源外的其它预设时频资源是否被占用。
  27. 根据权利要求25或26所述的终端设备，其特征在于，所述确定单元具体用于：
    确定所述第二预设时频资源承载的信号的能量值；
    若所述信号的能量值小于或者等于预设能量值，确定所述第二预设时频资源未被占用；或
    若所述信号的能量值大于预设能量值，确定所述第二预设时频资源未被占用。
  28. 根据权利要求22至27中任一项所述的终端设备，其特征在于，在所述随机接入前导的第i次传输后的所述功率增加计数器的值用于确定所述随机接入前导的第i+1次的传输功率。
  29. 根据权利要求22至28中任一项所述的终端设备，其特征在于，所述处理单元具体用于：
    在所述收发单元执行所述随机接入前导的第i次传输之后，若确定所述随机接入前导的第i次传输失败，将所述随机接入前导的传输次数计数器的值加1，所述传输次数计数器用于记录所述随机接入前导的传输次数。
  30. 根据权利要求29所述的终端设备，其特征在于，所述收发单元具体用于：
    在所述处理单元将所述随机接入前导的传输次数计数器的值加1之后，若所述传输次数计数器的值小于或者等于所述随机接入前导的传输次数最大值，执行所述随机接入前导的第i+1次传输；或
    若所述传输次数计数器的值大于所述传输次数最大值，确定随机接入过程失败。
  31. 根据权利要求30所述的终端设备，其特征在于，所述终端设备还包括：
    确定单元，用于在所述确定单元确定随机接入过程失败之后，确定所述随机接入前导的接收小区为主小区；
    所述收发单元具体用于：
    向所述主小区对应的网络设备发送无线资源控制RRC信令，所述RRC信令用于指示无线链路失败。
  32. 根据权利要求29至31中任一项所述的终端设备，其特征在于，所 述终端设备还包括：
    确定单元，用于确定用于传输所述随机接入前导的传输资源属于授权频段或非授权频段；
    所述处理单元具体用于：
    若所述传输资源属于授权频段，将所述随机接入前导的传输次数最大值设置为第一值；或
    若所述传输资源属于非授权频段，将所述传输次数最大值设置为第二值，所述第一值与所述第二值不同。
  33. 根据权利要求32所述的终端设备，其特征在于，所述第一值小于所述第二值。
  34. 根据权利要求32或33所述的终端设备，其特征在于，所述收发单元具体用于：
    接收网络设备发送的配置信息，所述配置信息包括所述第一值和/或第二值。
  35. 一种终端设备，其特征在于，包括：
    确定单元，用于确定用于传输随机接入前导的传输资源属于授权频段或非授权频段；
    处理单元，用于若所述传输资源属于授权频段，将所述随机接入前导的传输次数最大值设置为第一值；或
    所述处理单元还用于：若所述传输资源属于非授权频段，将所述传输次数最大值设置为第二值，所述第一值与所述第二值不同。
  36. 根据权利要求35所述的终端设备，其特征在于，所述第一值小于所述第二值。
  37. 根据权利要求35或36所述的终端设备，其特征在于，所述终端设备还包括：
    收发单元，用于接收网络设备发送的配置信息，所述配置信息包括所述第一值和/或第二值。
  38. 根据权利要求35至37中任一项所述的终端设备，其特征在于，所述处理单元具体用于：
    若所述随机接入前导的第i次传输失败，将所述随机接入前导的传输次数计数器的值加1，所述传输次数计数器用于记录所述随机接入前导的传输 次数，i为正整数。
  39. 根据权利要求38所述的终端设备，其特征在于，所述处理单元具体用于：
    在所述将所述随机接入前导的传输次数计数器的值加1之后，若所述传输次数计数器的值小于或者等于所述传输次数最大值，执行所述随机接入前导的第i+1次传输；或
    若所述传输次数计数器的值大于所述传输次数最大值，确定随机接入过程失败。
  40. 根据权利要求39所述的终端设备，其特征在于，所述确定单元具体用于：
    在所述确定随机接入过程失败之后，确定所述随机接入前导的接收小区为主小区；
    所述终端设备还包括：
    收发单元，用于向所述主小区对应的网络设备发送无线资源控制RRC信令，所述RRC信令用于指示无线链路失败。
  41. 根据权利要求38所述的终端设备，其特征在于，所述确定单元具体用于：
    确定所述传输资源中的第一资源是否被占用；
    若所述第一资源被占用，确定所述传输资源中除所述第一资源外的其他资源是否被占用；或
    若所述第一资源未被占用，使用所述第一资源执行所述随机接入前导的第i次传输。
  42. 根据权利要求41所述的终端设备，其特征在于，所述确定单元具体用于：
    在所述若所述第一资源被占用，确定所述传输资源中除所述第一资源外的其他资源是否被占用之后，若所述传输资源中不存在未被占用的资源，确定所述随机接入前导的第i次传输失败。
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CN111316743A (zh) 2020-06-19
CN114126078B (zh) 2023-04-07
AU2017444147B2 (en) 2023-04-06
EP3726916A1 (en) 2020-10-21
US11357058B2 (en) 2022-06-07

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