WO2020216010A1 - 一种随机接入方法、网络设备和终端设备 - Google Patents

一种随机接入方法、网络设备和终端设备 Download PDF

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Publication number
WO2020216010A1
WO2020216010A1 PCT/CN2020/082219 CN2020082219W WO2020216010A1 WO 2020216010 A1 WO2020216010 A1 WO 2020216010A1 CN 2020082219 W CN2020082219 W CN 2020082219W WO 2020216010 A1 WO2020216010 A1 WO 2020216010A1
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identifier
random access
access preamble
rnti
carrier
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PCT/CN2020/082219
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English (en)
French (fr)
Inventor
许斌
李秉肇
陈磊
王学龙
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • 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

Definitions

  • This application relates to the field of network communication technology, and in particular to a random access method, network equipment and terminal equipment.
  • the terminal equipment needs to obtain uplink synchronization with the network equipment through a random access process to facilitate subsequent communication.
  • the random access process within a random access response (RAR) receiving window (when the maximum length of the window is 10ms), the random access corresponding to each RAR-wireless network temporary identifier (random Access-radio network temporary identifier (RA-RNTI) is unique.
  • RAR random access response
  • RA-RNTI Random Access-radio network temporary identifier
  • the existing calculation method cannot guarantee that the calculated RA-RNTI is unique within the extended receiving window, which may cause multiple UEs Receiving the same RAR leads to confusion in the reception of random access responses, which affects wireless communication.
  • the embodiments of the present application provide a random access method, network equipment, and terminal equipment to ensure that the RA-RNTI is unique within the RAR receiving window, so that the RAR can be received correctly and random access can be successfully performed.
  • an embodiment of the present application provides a random access method, including: a terminal device sends a random access preamble to a network device; according to the first orthogonal frequency division multiplexing OFDM symbol of the sending random access preamble At least one of the identification of the random access preamble, the frequency domain identification of the random access preamble, the identification of the uplink carrier that sends the random access preamble, and the first identification determine the random access-radio network temporary identification RA-RNTI, where the first An identifier is determined according to at least one of the system frame number SFN for sending the random access preamble, the identifier of the time slot for sending the random access preamble, and a first value.
  • the first value is a positive integer; and finally the receiving network according to RA-RNTI Random access response RAR sent by the device.
  • the physical random access channel opportunity PRACH occurrence indicates the time-frequency position where the random access preamble can be sent, and the time-frequency position refers to the position in the time domain and the position in the frequency domain.
  • the RA-RNTI only the RA-RNTI is allocated to the periodically configured PRACH occasion, and the RA-RNTI is no longer allocated if the time unit of the PRACH occasion is not configured, which can reduce unnecessary resource waste.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window. Therefore, RAR can be received correctly and random access can be successfully performed.
  • the RA-RNTI calculation formula only the RA-RNTI is allocated for the periodically configured PRACH occasion, and the RA-RNTI is no longer allocated if the time unit of the PRACH occasion is not configured, which can reduce unnecessary waste of resources.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window.
  • RA-RNTI In this method, according to the situation that a system frame contains 80 time slots, through the RA-RNTI calculation formula, only the RA-RNTI is allocated for the periodically configured PRACH occasion, and the time unit without the PRACH occasion is no longer allocated. RA-RNTI, this can avoid allocating RA-RNTI to the time that is not configured with PRACH occasion to the greatest extent, which will cause the waste of RA-RNTI. In addition, the introduction of SFN can ensure that the calculated RA-RNTI is unique within a larger RAR receiving window.
  • the first value is the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the first value is set as the period value, and RA-RNTI can be dynamically allocated according to the period length of the PRACH occasion, which increases the flexibility of RA-RNTI calculation.
  • the value of the period of PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, to ensure that the network device can distinguish the received random access The PRACH occurrence corresponding to the incoming preamble.
  • the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the network device identifies the RA-RNTI used by the RAR and the terminal device receives the RA used by the RAR -If the RNTI is the same, the RAR can be received. Specifically, the network equipment uses the PDCCH to schedule the RAR, wherein the downlink control information (DCI) transmitted on the PDCCH is scrambled by the RA-RNTI. After receiving the DCI, the terminal device can decode the received RAR according to the RA-RNTI. Time-frequency position so that RAR can be received accordingly.
  • DCI downlink control information
  • the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay. Ensure that the terminal device can receive the RAR within the RAR receiving window.
  • the length of the RAR receiving window can be equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay plus a fixed time value, where the fixed time value can be based on The indication information in the RRC signaling sent by the network device is determined.
  • the length of the RAR receiving window needs to consider the propagation delay difference from different terminal equipment to the network device.
  • it needs to consider the flexibility of the scheduling timing of the network equipment (the configured fixed time value), so as to ensure that the terminal device can be in the RAR receiving window. RAR can be received within.
  • the embodiments of the present application provide a random access method, including: a terminal device sends a random access preamble to a network device; sending the random access preamble according to the identifier of the subframe where the random access preamble is sent
  • the identification of the frequency domain, the identification of the uplink carrier for sending the random access preamble, the system frame number SFN for sending the random access preamble, and the value of the period of the PRACH occasion of the physical random access channel opportunity for sending the random access preamble At least one of determines the random access-radio network temporary identifier RA-RNTI; finally, the random access response RAR sent by the network device is received according to the RA-RNTI.
  • the RA-RNTI When calculating the RA-RNTI, by changing the periodically configured PRACH occasion into a continuous PRACH occasion in the time domain, the RA-RNTI can be continuously allocated, and the RA-RNTI is no longer allocated within the unit time when the PRACH occasion is not configured. It is guaranteed that when the RAR receiving window is greater than 10ms, the calculated RA-RNTI is unique within the RAR receiving window. Therefore, RAR can be received correctly and random access can be successfully performed.
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 k ul_carrier_id+10 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where t_id is a subframe F_id is the frequency domain identifier, ul_carrier_id is the identifier of the uplink carrier, periodicity is the value of the period, the ceiling function represents the round up operation, mod represents the remainder operation, k is used to represent the subcarrier spacing parameter, and k is greater than or equal to An integer of 0, and y is the duration of the system frame.
  • the minimum time unit to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe, which ensures that no RA-RNTI will be allocated for more fine-grained time units. Avoid the waste of RA-RNTI.
  • SFN is introduced to distinguish subframes in different SFNs to ensure that when the RAR reception window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR reception window.
  • the meaning of y varies with the unit of perodicity.
  • the unit of periodicity is milliseconds
  • the unit of y is also milliseconds; and assuming that the unit of perodicity is subframe , Then the unit of y is also a subframe. At this time, since the system frame is 10 subframes, the value of y can be 10.
  • periodicity/y means that the length of a cycle involves several system frames, and it can also be understood that the length of a cycle spans several system frames. All expressions that embody this idea fall under the present invention. Within the scope of protection.
  • RA-RNTI 1+t_id+10 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFNmod Ceiling(periodicity/y)), where t_id is the identifier of the subframe, and f_id is the frequency
  • t_id is the identifier of the subframe
  • f_id is the frequency
  • ul_carrier_id is the identifier of the uplink carrier
  • periodicity is the value of the period
  • the ceiling function represents the round-up operation
  • mod represents the remainder operation
  • y is the duration of the system frame.
  • the minimum time unit that needs to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe, which can guarantee that it will not be RA-RNTI is allocated in more fine-grained time units, thereby avoiding the waste of RA-RNTI.
  • SFN is introduced to distinguish subframes in different SFNs to ensure that when the RAR reception window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR reception window.
  • the value of the period of PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, to ensure that the network device can distinguish the received random access The PRACH occurrence corresponding to the incoming preamble.
  • the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the network device identifies the RA-RNTI used by the RAR and the terminal device receives the RA used by the RAR -If the RNTI is the same, the RAR can be received. Specifically, the network equipment uses the PDCCH to schedule the RAR, wherein the downlink control information (DCI) transmitted on the PDCCH is scrambled by the RA-RNTI. After receiving the DCI, the terminal device can decode the received RAR according to the RA-RNTI. Time-frequency position so that RAR can be received accordingly.
  • DCI downlink control information
  • the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay. Ensure that the terminal device can receive the RAR within the RAR receiving window.
  • the length of the RAR receiving window can be equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay plus a fixed time value, where the fixed time value can be based on The indication information in the RRC signaling sent by the network device is determined.
  • the length of the RAR receiving window needs to consider the propagation delay difference from different terminal equipment to the network device.
  • it needs to consider the flexibility of the scheduling timing of the network equipment (the configured fixed time value), so as to ensure that the terminal device can be in the RAR receiving window. RAR can be received within.
  • an embodiment of the present application provides a random access method, including: a network device receives a random access preamble sent by a terminal device; according to the first orthogonal frequency division multiplexing of the random access preamble sent by the terminal device Use at least one of the identification of the OFDM symbol, the identification of the frequency domain where the terminal device sends the random access preamble, the identification of the uplink carrier where the terminal device sends the random access preamble, and the first identification to determine the random access-wireless network temporary identification RA-RNTI, where the first identifier is determined according to at least one of the system frame number SFN in which the terminal device sends the random access preamble, the identifier of the time slot in which the terminal device sends the random access preamble, and the first value, and the first value It is a positive integer; finally the random access response RAR is sent to the terminal device, and the RAR is identified by RA-RNTI.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window.
  • the RA-RNTI calculation formula only the RA-RNTI is allocated for the periodically configured PRACH occasion, and the RA-RNTI is no longer allocated if the time unit of the PRACH occasion is not configured, which can reduce unnecessary waste of resources.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window.
  • RA-RNTI In this method, according to the situation that a system frame contains 80 time slots, through the RA-RNTI calculation formula, only the RA-RNTI is allocated for the periodically configured PRACH occasion, and the time unit without the PRACH occasion is no longer allocated. RA-RNTI, this can avoid allocating RA-RNTI to the time that is not configured with PRACH occasion to the greatest extent, which will cause the waste of RA-RNTI.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window.
  • the first value is the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the value of the period of PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, to ensure that the network device can distinguish the received random access The PRACH occurrence corresponding to the incoming preamble.
  • the network device can broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, and can also send instruction information to the terminal device through RRC signaling, and the instruction information is used to notify the terminal device and the network
  • the maximum one-way propagation delay and the minimum one-way propagation delay between devices This allows the terminal device to determine the value of the period of PRACH occurrence according to the maximum one-way propagation delay and the minimum one-way propagation delay.
  • an embodiment of the present application provides a random access method, including: a network device receives a random access preamble sent by a terminal device; according to the identification of the subframe in which the terminal device sends the random access preamble, the terminal device sends The identification of the frequency domain of the random access preamble, the identification of the uplink carrier where the terminal device sends the random access preamble, the system frame number SFN of the terminal device sending the random access preamble, and the physical randomness of the terminal device sending the random access preamble. At least one of the value of the period of the access channel opportunity PRACH occasion determines the random access-radio network temporary identification RA-RNTI; finally, the random access response RAR is sent to the terminal device, and the RAR is identified by the RA-RNTI.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window.
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 k ul_carrier_id+10 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where t_id is the sub The identification of the frame, f_id is the identification of the frequency domain, ul_carrier_id is the identification of the uplink carrier, periodicity is the value of the period, the ceiling function represents the round-up operation, mod represents the remainder operation, k is used to represent the subcarrier spacing parameter, and k is greater than An integer equal to 0, y is the duration of the system frame.
  • the smallest time unit to be considered is a subframe, that is, at most one PRACH occasion can be configured in a subframe, which ensures that no RA-RNTI will be allocated for more fine-grained time units. Avoid the waste of RA-RNTI.
  • SFN is introduced to distinguish subframes in different SFNs to ensure that the calculated RA-RNTI is unique within a larger RAR receiving window.
  • RA-RNTI 1+t_id+10 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFNmod Ceiling(periodicity/y)), where t_id is the identifier of the subframe, and f_id is the frequency
  • t_id is the identifier of the subframe
  • f_id is the frequency
  • ul_carrier_id is the identifier of the uplink carrier
  • periodicity is the value of the period
  • the ceiling function represents the round-up operation
  • mod represents the remainder operation
  • y is the duration of the system frame.
  • the minimum time unit that needs to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe, which can guarantee that it will not be RA-RNTI is allocated in more fine-grained time units, thereby avoiding the waste of RA-RNTI.
  • SFN is introduced to distinguish subframes in different SFNs to ensure that the calculated RA-RNTI is unique within a larger RAR receiving window.
  • the value of the period of PRACH occasion is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, to ensure that the network device can distinguish the received random access The PRACH occurrence corresponding to the incoming preamble.
  • the network device can broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, and can also send instruction information to the terminal device through RRC signaling, and the instruction information is used to notify the terminal device and the network
  • the maximum one-way propagation delay and the minimum one-way propagation delay between devices This allows the terminal device to determine the value of the period of PRACH occurrence according to the maximum one-way propagation delay and the minimum one-way propagation delay.
  • the embodiments of the present application provide a terminal device configured to implement the methods and functions performed by the terminal device in the first aspect and the second aspect described above.
  • the terminal device is implemented by hardware/software. Including modules corresponding to the above functions.
  • the embodiments of the present application provide a network device configured to implement the methods and functions performed by the network device in the third aspect and the fourth aspect.
  • the network device is implemented by hardware/software, and its hardware/software Including modules corresponding to the above functions.
  • the embodiments of the present application provide another terminal device, including: a processor, a memory, and a communication bus, where the communication bus is used to implement connection and communication between the processor and the memory, and the processor executes the program stored in the memory It is used to implement the steps in the random access method provided in the first aspect and the second aspect.
  • the terminal device provided in this application may include a module corresponding to the behavior of the terminal device in the above method design.
  • the module can be software and/or hardware.
  • the embodiments of the present application provide another network device, including: a processor, a memory, and a communication bus, where the communication bus is used to implement connection and communication between the processor and the memory, and the processor executes the program stored in the memory It is used to implement the steps in the random access method provided by the third aspect and the fourth aspect.
  • the network device provided in the present application may include modules corresponding to the behavior of the network device in the above method design.
  • the module can be software and/or hardware.
  • the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the methods of the above aspects.
  • this application provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the methods of the above-mentioned aspects.
  • an embodiment of the present application provides a communication system, which includes the terminal device described in the fifth aspect and the seventh aspect, and the network device described in the sixth aspect and the eighth aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a wireless access method provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of an NTN scenario provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the configuration of a PRACH occasion period provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another wireless access method provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another terminal device provided by an embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of another network device provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • the communication system 100 may include a network device 110 and terminal devices 101 to 106. It should be understood that the communication system 100 may include more or fewer network devices or terminal devices.
  • the network device or terminal device can be hardware, software that is functionally divided, or a combination of the two.
  • the terminal device 104 to the terminal device 106 may also form a communication system.
  • the terminal device 105 may send downlink data to the terminal device 104 or the terminal device 106.
  • Network equipment and terminal equipment can communicate with other equipment or network elements.
  • the network device 110 may send downlink data to the terminal device 101 to the terminal device 106, and may also receive uplink data sent by the terminal device 101 to the terminal device 106.
  • the terminal device 101 to the terminal device 106 may also send uplink data to the network device 110, and may also receive downlink data sent by the network device 110.
  • the terminal equipment 101 to the terminal equipment 106 may be user equipment (UE), cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radio devices, global positioning systems, and personal digital assistants (personal digital assistants, PDA) and/or any other suitable device for communicating on the wireless communication system 100, etc.
  • the network device 110 may be a device used to communicate with terminal devices, such as an access point, a relay node, a base transceiver station (BTS), a node B (NB), and an evolved node (evolved node B).
  • ENB base transceiver station
  • NB node B
  • evolved node B evolved node
  • ENB 5G base station
  • gNB 5G base station
  • the communication system 100 may adopt a public land mobile network (PLMN), a device-to-device (D2D) network, a machine-to-machine (M2M) network, and the Internet of Things (Internet of Things). things, IoT) or other networks.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT Internet of Things
  • the communication system 100 can be applied to the 5th generation (5G) new radio (NR) system, and can also be applied to non-ground communication networks, such as communication networks where base stations are on satellites or other flying equipment. , Or a communication network that uses satellites, flying equipment, etc. as relays. It can also be applied to scenarios where unlicensed spectrum is used for communication based on 5G architecture.
  • 5G 5th generation
  • NR new radio
  • the embodiment of this application relates to the random access process, and the random access process is introduced as follows:
  • the terminal device first sends a random access preamble (RAP) to the network device. After the terminal device sends the random access preamble, an RA-RNTI can be calculated. After the network device receives the random access preamble, it determines that the terminal device requests random access, and can estimate the transmission delay between the terminal device and the network device, or calculate an RA-RNTI, and then send the random access to the terminal device. Access response (random access response, RAR), and use RA-RNTI to identify RAR. The terminal device monitors the physical downlink control channel (PDCCH) in the RAR receiving window, uses the RA-RNTI calculated by itself to decode the DCI, and then receives the corresponding RAR.
  • PDCCH physical downlink control channel
  • the RAR can be received correctly. If the RAR cannot be received correctly, it means that the RAR sent by the network device has not been received within the RAR receiving window, and it is determined that the random access process has failed.
  • the value of RA-RNTI is determined by the time-frequency position of the physical random access channel occasion (PRACH occasion) of the random access preamble.
  • the time-frequency position refers to the position of the random access preamble in the time domain and the position in the frequency domain.
  • the RA-RNTI and the PRACH occasion have a one-to-one correspondence, and the terminal device determines in which PRACH occasion the random access preamble is sent, so an RA-RNTI can be calculated.
  • the network device After receiving the random access preamble, the network device can also calculate an identical RA-RNTI according to the time-frequency position of the PRACH occasion, and the RAR is identified by the RA-RNTI.
  • s_id represents the first positive of the random access preamble
  • the identification of the orthogonal frequency division multiplexing (OFDM) symbol (0 ⁇ s_id ⁇ 14)
  • t_id is the identification of the time slot for transmitting the random access preamble (0 ⁇ t_id ⁇ 80)
  • f_id is the transmission
  • the frequency domain identifier of the random access preamble (0 ⁇ f_id ⁇ 8)
  • ul_carrier_id sends the identifier (0 or 1) of the uplink carrier of the random access preamble.
  • the RA-RNTI calculated by the calculation formula can ensure that the RA-RNTI corresponding to each RAR received within a RAR receiving window (the maximum length is 10 ms) is unique. That is, within a 10ms RAR receiving window, the RAR received in each unit time corresponds to a unique RA-RNTI. If there are 100 unit times in the 10ms RAR receiving window, there are 100 RA-RNTIs. If the length of the RAR receiving window is extended to 20ms, there are 200 unit times. In this case, 100 RA-RNTIs cannot guarantee that each unit time has a unique RA-RNTI.
  • the RAR reception window needs to be extended to a length greater than 10 ms, or even tens of milliseconds.
  • Existing calculation methods cannot guarantee that the calculated RA-RNTI is unique within the extended receiving window. Therefore, multiple UEs may receive the same RAR, leading to confusion in random access response reception and affecting wireless communication.
  • the embodiments of the present application provide the following solutions.
  • FIG. 2 is a schematic flowchart of a wireless access method provided by an embodiment of the present application.
  • the steps in the implementation of this application include at least:
  • the terminal device sends a random access preamble to the network device, and the network device receives the random access preamble sent by the terminal device.
  • the terminal device sends the random access preamble according to the identifier of the first orthogonal frequency division multiplexing OFDM symbol that sends the random access preamble, and the identifier of the frequency domain for sending the random access preamble. At least one of the identifier of the uplink carrier and the first identifier determines the random access-radio network temporary identifier RA-RNTI, where the first identifier is based on the system frame number for sending the random access preamble. , SFN), at least one of the identification of the time slot for transmitting the random access preamble and the first value is determined, and the first value is a positive integer. Including the following options:
  • the f_id is an identifier of the frequency domain, and 0 ⁇ f_id ⁇ 8.
  • the t_id is the first identifier, 0 ⁇ t_id ⁇ 10 ⁇ 2 k
  • the slot_id is the identifier of the time slot, 0 ⁇ slot_id ⁇ 80.
  • the x is the first value, and the first value may be the periodicality of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble, or it may be a positive integer assigned to the first value.
  • the unit is a time slot.
  • the ceiling function represents a round-up operation, the mod represents a remainder operation, the k is used to represent a sub-carrier space parameter (sub-carrier space, SCS), and the k is an integer greater than or equal to 0.
  • SCS sub-carrier space
  • t_id ceiling((SFN ⁇ 80+slot_id)/x)mod(80).
  • the first value x may be the periodicality of the period of the PRACH occurrence of transmitting the random access preamble.
  • the embodiment of the present application also provides several RA-RNTI calculation formulas that are not related to k, including at least:
  • the ul_carrier_id is the identifier of the uplink carrier (0 or 1)
  • the t_id is the first identifier
  • the slot_id is the identifier of the time slot, 0 ⁇ slot_id ⁇ 80.
  • the x is the first value
  • the ceiling function represents a round-up operation
  • the mod represents a remainder operation.
  • the first value may be the period value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the value of the period of the PRACH occurrence period is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay to ensure that the network device can distinguish the PRACH corresponding to the received random access preamble occasion.
  • the network device can broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, or it can send instruction information to the terminal device through radio resource control (RRC) signaling, and the instruction information is used to notify the terminal The maximum one-way propagation delay and the minimum one-way propagation delay between the device and the network device.
  • the terminal device can determine the value of the period of the PRACH occasion according to the maximum one-way propagation delay and the minimum one-way propagation delay.
  • FIG. 4 is a schematic diagram of the configuration of a PRACH occasion period provided by an embodiment of the present application. If the value of the period of PRACH occasion is not less than (maximum one-way propagation delay-minimum one-way propagation delay)*2, and the value of the period of PRACH occasion is greater than or equal to the length of the receiving window for the base station to receive the random access preamble, Then the receiving window 1 and receiving window 2 of the base station to receive the random access preamble can be staggered.
  • the receiving window 2 The starting position needs to be moved forward, resulting in an overlapping area between receiving window 1 and receiving window 2. If the base station receives the random access preamble sent by the terminal device in the overlapping area, it cannot determine from which PRACH occasion the random access preamble was sent.
  • the network device may send the random access preamble according to the identification of the first orthogonal frequency division multiplexing OFDM symbol of the terminal device and send the random access preamble.
  • At least one of the frequency domain identifier of the incoming preamble, the identifier of the uplink carrier through which the terminal device sends the random access preamble, and the first identifier determine the random access-radio network temporary identifier RA-RNTI, where all The first identifier is determined according to at least one of the system frame number SFN for sending the random access preamble by the terminal device, the identifier of the time slot for sending the random access preamble by the terminal device, and a first value, The first value is a positive integer.
  • the specific method for the network device to calculate the RA-RNTI is the same as the method for the terminal device to calculate the RA-RNTI, and will not be repeated here.
  • the network equipment can identify the RAR through the calculated RA-RNTI, and then send the RAR identified through the RA-RNTI to the terminal equipment.
  • the RA-RNTI identification of the RAR may be that the network device uses the PDCCH to schedule the RAR, where the DCI transmitted on the PDCCH is scrambled by the RA-RNTI.
  • S203 The network device sends a random access response RAR to the terminal device, and the terminal device receives the random access response RAR sent by the network device according to the RA-RNTI.
  • the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the RA-RNTI used by the network device identifier RAR is the same as the RA-RNTI used by the terminal device to receive the RAR, then RAR can be received. Specifically, the network equipment uses the PDCCH to schedule RARs, where the DCI transmitted on the PDCCH is scrambled using RA-RNTI. After receiving the DCI, the terminal equipment can decode the time-frequency position of the received RAR according to the RA-RNTI, so that it can receive accordingly RAR.
  • the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, or it can be greater than or equal to the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay Two times the value plus a fixed time value, where the fixed time value can be determined according to the indication information in the RRC signaling sent by the network device.
  • the first time difference between the time when the UE sends the random access preamble and the time when the UE receives the RAR can be greater than or equal to the one-way propagation delay*2, and the fixed time value can be the time from when the base station receives the random access preamble to when the base station sends the RAR.
  • Time difference the fixed time value is greater than or equal to 0.
  • the maximum difference in the first time difference between different UEs is the maximum one-way propagation delay minus the minimum one-way propagation delay Twice the difference.
  • the RAR receiving window time of the UE should be greater than or equal to the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay Double plus a fixed time value.
  • the RAR receiving window time of the UE should be greater than or equal to the maximum one-way propagation delay minus the minimum one-way propagation time The delay is twice the difference. If the length of the RAR receiving window is less than twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, the RAR receiving window has been closed during the RAR propagation process, resulting in failure to receive RAR.
  • the introduction of SFN can ensure that when the RAR receiving window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR receiving window, and the number of RA-RNTIs does not increase, so that the RAR can be received correctly and random access can be successfully performed.
  • FIG. 5 is a schematic flowchart of another wireless access method provided by an embodiment of the present application.
  • the steps in the implementation of this application include at least:
  • S501 The terminal device sends a random access preamble to the network device, and the network device receives the random access preamble sent by the terminal device.
  • the terminal device transmits the identifier of the uplink carrier transmitting the random access preamble according to the identifier of the subframe where the random access preamble is transmitted, the identifier of the frequency domain where the random access preamble is transmitted, and the identifier of the uplink carrier transmitting the random access preamble.
  • At least one of the system frame number SFN of the random access preamble and the value of the period of the physical random access channel opportunity PRACH occurrence for transmitting the random access preamble determines the random access-radio network temporary identifier RA-RNTI. Including the following options:
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 k ul_carrier_id+10 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), wherein the t_id is The identifier of the subframe, 0 ⁇ t_id ⁇ 10.
  • the f_id is an identifier of the frequency domain, and 0 ⁇ f_id ⁇ 8.
  • the ul_carrier_id is the identifier of the uplink carrier, and ul_carrier_id is equal to 0 or 1.
  • the periodicity is the value of the period, and the unit is a subframe.
  • the ceiling function represents the round-up operation
  • the mod represents the remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0
  • the y is the duration of the system frame, and the unit is ms, for example, y can be 10.
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 4 ⁇ ul_carrier_id+40 ⁇ 2 ⁇ (SFNmod Ceiling(periodicity/y)).
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 ⁇ ul_carrier_id+20 ⁇ 2 ⁇ (SFNmod Ceiling(periodicity/y)).
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ ul_carrier_id+10 ⁇ 2 ⁇ (SFNmod Ceiling(periodicity/y)).
  • the embodiment of the present application also provides several RA-RNTI calculation formulas that are independent of k, including at least:
  • RA-RNTI 1+t_id+10 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the identifier of the subframe, 0 ⁇ t_id ⁇ 10.
  • the f_id is an identifier of the frequency domain, and 0 ⁇ f_id ⁇ 8.
  • the ul_carrier_id is the identifier of the uplink carrier, ul_carrier_id is equal to 0 or 1, and the periodicity is the value of the period.
  • the ceiling function represents a round-up operation, the mod represents a remainder operation, and the y is the duration of the system frame in ms. For example, y may be 10.
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 4 ⁇ ul_carrier_id+40 ⁇ 2 ⁇ (SFNmod Ceiling(periodicity/y)).
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 ⁇ ul_carrier_id+20 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)).
  • RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ ul_carrier_id+10 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)).
  • the period of PRACH occurrence cannot be configured in the time domain to a time granularity such as a symbol or even a time slot. It is very likely that only one PRACH can be configured in a subframe. Occasionally, therefore, when calculating RA-RNTI, it is not necessary to reflect the parameters representing the symbol and the time slot, but only to reflect the subframe granularity. In the embodiment of this application, the RA-RNTI is calculated on the subframe granularity.
  • the value of the period of the PRACH occurrence period is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay to ensure that the network device can distinguish the PRACH corresponding to the received random access preamble occasion.
  • the network device can broadcast the maximum one-way propagation delay and the minimum one-way propagation delay, and can also send instruction information to the terminal device through RRC signaling.
  • the instruction information is used to notify the terminal device of the maximum transmission delay between the network device and the network device. Propagation delay and minimum one-way propagation delay.
  • the terminal device can determine the value of the period of the PRACH occasion according to the maximum one-way propagation delay and the minimum one-way propagation delay.
  • the receiving window 1 and receiving window 2 of the PRACH occasion of the base station receiving the random access preamble can be staggered, if the value of the period of the PRACH occasion is less than (maximum one-way propagation delay-minimum one-way propagation time Extension*2, the starting position of the receiving window 2 needs to be moved forward, resulting in an overlapping area between the receiving window 1 and the receiving window 2.
  • the base station If the base station receives the random access preamble sent by the terminal device in the overlapping area, it cannot determine from which PRACH occasion the random access preamble was sent. Therefore, only if periodicity is not less than (maximum one-way propagation delay-minimum one-way propagation delay)*2, and the value of the period of PRACH occurrence is greater than or equal to the length of the receiving window of the base station to receive the random access preamble, It can be guaranteed that only one random access preamble is received in each random access preamble receiving window.
  • the network device After the network device receives the random access preamble, it can be based on the identification of the subframe in which the terminal device sends the random access preamble, the identification of the frequency domain in which the terminal device sends the random access preamble, and the The identifier of the uplink carrier for the terminal device to send the random access preamble, the system frame number SFN for the terminal device to send the random access preamble, and the physical randomness for the terminal device to send the random access preamble. At least one of the value of the period of the access channel opportunity PRACH occasion determines the random access-radio network temporary identification RA-RNTI.
  • the specific method for the network device to calculate the RA-RNTI is the same as the method for the terminal device to calculate the RA-RNTI, and will not be repeated here.
  • the network equipment can identify the RAR through the calculated RA-RNTI, and then send the RAR identified through the RA-RNTI to the terminal equipment.
  • the RA-RNTI identification of the RAR may be that the network device uses the PDCCH to schedule the RAR, where the DCI transmitted on the PDCCH is scrambled by the RA-RNTI.
  • the network device sends a random access response RAR to the terminal device, and the terminal device receives the random access response RAR sent by the network device according to the RA-RNTI.
  • the terminal device can receive the RAR sent by the network device according to the calculated RA-RNTI in the RAR receiving window. If the RA-RNTI used by the network device identifier RAR is the same as the RA-RNTI used by the terminal device to receive the RAR, then RAR can be received. Specifically, the network equipment uses the PDCCH to schedule RARs, where the DCI transmitted on the PDCCH is scrambled using RA-RNTI. After receiving the DCI, the terminal equipment can decode the time-frequency position of the received RAR according to the RA-RNTI, so that it can receive accordingly RAR.
  • the length of the RAR receiving window is greater than or equal to twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, or it can be greater than or equal to the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay Two times the value plus a fixed time value, where the fixed time value can be determined according to the indication information in the RRC signaling sent by the network device.
  • the first time difference between the time when the UE sends the random access preamble and the time when the UE receives the RAR can be greater than or equal to the one-way propagation delay*2, and the fixed time value can be the time from when the base station receives the random access preamble to when the base station sends the RAR.
  • Time difference the fixed time value is greater than or equal to 0.
  • the maximum difference in the first time difference between different UEs is the maximum one-way propagation delay minus the minimum one-way propagation delay Twice the difference.
  • the time of the UE’s RAR reception window should be greater than or equal to the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay Double plus a fixed time value.
  • the RAR receiving window time of the UE should be greater than or equal to the maximum one-way propagation delay minus the minimum one-way propagation time The delay is twice the difference. If the length of the RAR receiving window is less than twice the difference between the maximum one-way propagation delay minus the minimum one-way propagation delay, the RAR receiving window has been closed during the RAR propagation process, resulting in failure to receive RAR.
  • the minimum time unit that needs to be considered is a subframe, that is, only one PRACH Occasion can be configured in a subframe, which can ensure that it will not be a more fine-grained time.
  • the unit allocates RA-RNTI, thereby avoiding the waste of RA-RNTI.
  • SFN is introduced to distinguish subframes in different SFNs to ensure that when the RAR reception window is greater than 10 ms, the calculated RA-RNTI is unique within the RAR reception window. Therefore, RAR can be received correctly and random access can be successfully performed.
  • Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device may include a sending module 601, a processing module 602, and a receiving module 603.
  • the detailed description of each module is as follows.
  • the sending module 601 is used to send a random access preamble to a network device.
  • the processing module 602 is configured to send the random access preamble according to the identifier of the first orthogonal frequency division multiplexing OFDM symbol for sending the random access preamble, and the identifier of the frequency domain for sending the random access preamble. At least one of the identifier of the uplink carrier of the preamble and the first identifier determines the random access-radio network temporary identifier RA-RNTI, where the first identifier is based on the system frame number SFN, which sends the random access preamble, At least one of the identifier of the time slot in which the random access preamble is sent and the first value are determined, and the first value is a positive integer.
  • the receiving module 603 is configured to receive, according to the RA-RNTI, a random access response RAR sent by the network device.
  • the RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 10 ⁇ 2 k ⁇ f_id+14 ⁇ 10 ⁇ 2 k ⁇ 8 ⁇ ul_carrier_id
  • t_id ceiling((SFN ⁇ 10 ⁇ 2 k +slot_id) / x) mod (10 ⁇ 2 k)
  • said first identifying the s_id is one OFDM symbol, which is identified as f_id the frequency domain
  • the ul_carrier_id the uplink carrier is identified
  • the The t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents the round-up operation
  • the mod represents the remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0.
  • the s_id is the identifier of the first OFDM symbol
  • the f_id is the identifier of the frequency domain
  • the ul_carrier_id is the identifier of the uplink carrier
  • the t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents a round-up operation
  • the mod represents a remainder operation.
  • the first value is the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the sending module 601 is used to send a random access preamble to a network device
  • the processing module 602 is configured to send the random access preamble according to the identifier of the subframe in which the random access preamble is sent, the identifier of the frequency domain for sending the random access preamble, and the identifier of the uplink carrier for sending the random access preamble. At least one of the system frame number SFN of the random access preamble and the value of the period of the physical random access channel opportunity PRACH occurrence for transmitting the random access preamble determines the random access-radio network temporary identification RA-RNTI ;
  • the receiving module 603 is configured to receive, according to the RA-RNTI, a random access response RAR sent by the network device.
  • the RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 k ul_carrier_id+10 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the subframe
  • the f_id is the frequency domain identifier
  • the ul_carrier_id is the uplink carrier identifier
  • the periodicity is the value of the period
  • the ceiling function represents the round-up operation
  • the mod represents the calculation For remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0
  • the y is the duration of the system frame.
  • the RA-RNTI 1+t_id+10 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the identifier of the subframe, and the f_id is The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is The duration of the system frame.
  • each module can also correspond to the corresponding description of the method embodiments shown in Figs. 2 and 5 to execute the methods and functions performed by the terminal device in the foregoing embodiments.
  • FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device may include a receiving module 701, a processing module 702, and a sending module 703.
  • the detailed description of each module is as follows.
  • the receiving module 701 is configured to receive a random access preamble sent by a terminal device
  • the processing module 702 is configured to send the random access preamble by the terminal device according to the identification of the first orthogonal frequency division multiplexing OFDM symbol and the frequency domain of the random access preamble by the terminal device. At least one of the identifier of the uplink carrier on which the terminal device sends the random access preamble and the first identifier determines the random access-radio network temporary identifier RA-RNTI, wherein the first identifier is based on the At least one of the system frame number SFN in which the terminal device sends the random access preamble, the identifier of the time slot in which the terminal device sends the random access preamble, and a first value is determined, and the first value is positive Integer
  • the sending module 703 is configured to send a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI.
  • the RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 10 ⁇ 2 k ⁇ f_id+14 ⁇ 10 ⁇ 2 k ⁇ 8 ⁇ ul_carrier_id
  • t_id ceiling((SFN ⁇ 10 ⁇ 2 k +slot_id) / x) mod (10 ⁇ 2 k)
  • said first identifying the s_id is one OFDM symbol, which is identified as f_id the frequency domain
  • the ul_carrier_id the uplink carrier is identified
  • the The t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents the round-up operation
  • the mod represents the remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0.
  • the s_id is the identifier of the first OFDM symbol
  • the f_id is the identifier of the frequency domain
  • the ul_carrier_id is the identifier of the uplink carrier
  • the t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents a round-up operation
  • the mod represents a remainder operation.
  • the first value is the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the receiving module 701 is configured to receive a random access preamble sent by a terminal device
  • the processing module 702 is configured to send the random access preamble according to the identification of the subframe of the terminal device, the frequency domain identification of the random access preamble, and the terminal device to send the The identifier of the uplink carrier of the random access preamble, the system frame number SFN for the terminal device to send the random access preamble, and the physical random access channel opportunity PRACH occasion for the terminal device to send the random access preamble At least one of the values of the period determines the random access-radio network temporary identification RA-RNTI;
  • the sending module 703 is configured to send a random access response RAR to the terminal device, where the RAR is identified by the RA-RNTI.
  • the RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 k ul_carrier_id+10 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the subframe
  • the f_id is the frequency domain identifier
  • the ul_carrier_id is the uplink carrier identifier
  • the periodicity is the value of the period
  • the ceiling function represents the round-up operation
  • the mod represents the calculation For remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0
  • the y is the duration of the system frame.
  • the RA-RNTI 1+t_id+10 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the identifier of the subframe, and the f_id is The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is The duration of the system frame.
  • each module can also refer to the corresponding description of the method embodiment shown in FIG. 2 and FIG. 5 to execute the method and function performed by the network device in the foregoing embodiment.
  • the terminal device may include: at least one processor 801, at least one communication interface 802, at least one memory 803, and at least one communication bus 804.
  • the processor 801 may be a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the communication bus 804 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into address bus, data bus, control bus, etc.
  • the communication bus 804 is used to implement connection and communication between these components.
  • the communication interface 802 of the device in the embodiment of the present application is used for signaling or data communication with other node devices.
  • the memory 803 may include volatile memory, such as nonvolatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive random access memory (magetoresistive RAM, MRAM), etc., can also include non-volatile memory, such as at least one disk storage device, electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), flash memory devices, such as reverse or flash memory (NOR flash memory) or NAND flash memory (NAND flash memory), semiconductor devices, such as solid state disks (SSD), etc.
  • the memory 803 may also be at least one storage device located far away from the foregoing processor 801.
  • the memory 803 may also store a set of program codes, and the processor 801 may optionally also execute programs executed in the memory 803.
  • the identifier of the first orthogonal frequency division multiplexing OFDM symbol for sending the random access preamble the identifier of the frequency domain for sending the random access preamble, and the uplink carrier for sending the random access preamble
  • At least one of the identifier and the first identifier determines the random access-radio network temporary identifier RA-RNTI, where the first identifier sends the random access preamble according to the system frame number SFN for sending the random access preamble.
  • At least one of the identification of the time slot of the preamble and the first value is determined, and the first value is a positive integer;
  • the random access response RAR sent by the network device is received according to the RA-RNTI through the communication interface 802.
  • the RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 8 ⁇ 2 k ⁇ f_id+14 ⁇ 8 ⁇ 2 k ⁇ 8 ⁇ ul_carrier_id
  • t_id ceiling((SFN ⁇ 8 ⁇ 2 k +slot_id) / x) mod (8 ⁇ 2 k)
  • said first identifying the s_id is one OFDM symbol, which is identified as f_id the frequency domain
  • the ul_carrier_id the uplink carrier is identified
  • the The t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents the round-up operation
  • the mod represents the remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0.
  • the s_id is the identifier of the first OFDM symbol
  • the f_id is the identifier of the frequency domain
  • the ul_carrier_id is the identifier of the uplink carrier
  • the t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents a round-up operation
  • the mod represents a remainder operation.
  • the first value is the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the random access preamble is sent At least one of the system frame number SFN of the code and the value of the period of the physical random access channel opportunity PRACH occurrence for transmitting the random access preamble determines the random access-radio network temporary identifier RA-RNTI;
  • the random access response RAR sent by the network device is received according to the RA-RNTI through the communication interface 802.
  • the RA-RNTI 1 + t_id + 8 ⁇ f_id + 8 ⁇ 2 k ul_carrier_id + 8 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling (periodicity / y)), wherein, the subframe is the t_id
  • the f_id is the frequency domain identifier
  • the ul_carrier_id is the uplink carrier identifier
  • the periodicity is the value of the period
  • the ceiling function represents the round-up operation
  • the mod represents the calculation For remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0
  • the y is the duration of the system frame.
  • the RA-RNTI 1+t_id+8 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the identifier of the subframe, and the f_id is The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is The duration of the system frame.
  • the processor may also cooperate with the memory and the communication interface to perform the operation of the terminal device in the above application embodiment.
  • FIG. 9 is a schematic structural diagram of another network device proposed in an embodiment of the present application.
  • the network device may include: at least one processor 901, at least one communication interface 902, at least one memory 903, and at least one communication bus 904.
  • the processor 901 may be various types of processors mentioned above.
  • the communication bus 904 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the communication bus 904 is used to implement connection and communication between these components. Among them, the communication interface 902 of the device in the embodiment of the present application is used for signaling or data communication with other node devices.
  • the memory 903 may be various types of memories mentioned above. Optionally, the memory 903 may also be at least one storage device located far away from the foregoing processor 901.
  • the memory 903 stores a set of program codes, and the processor 901 executes the programs executed by the above-mentioned OAM in the memory 903.
  • the terminal device According to the identification of the first orthogonal frequency division multiplexing OFDM symbol in which the terminal device sends the random access preamble, the identification of the frequency domain in which the terminal device sends the random access preamble, the terminal device At least one of the identifier of the uplink carrier that sends the random access preamble and the first identifier determines the random access-radio network temporary identifier RA-RNTI, where the first identifier is based on the terminal device sending the random At least one of the system frame number SFN of the access preamble, the identifier of the time slot where the terminal device sends the random access preamble, and a first value is determined, and the first value is a positive integer;
  • a random access response RAR is sent to the terminal device through the communication interface 902, where the RAR is identified by the RA-RNTI.
  • the RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 10 ⁇ 2 k ⁇ f_id+14 ⁇ 10 ⁇ 2 k ⁇ 8 ⁇ ul_carrier_id
  • t_id ceiling((SFN ⁇ 10 ⁇ 2 k +slot_id) / x) mod (10 ⁇ 2 k)
  • said first identifying the s_id is one OFDM symbol, which is identified as f_id the frequency domain
  • the ul_carrier_id the uplink carrier is identified
  • the The t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents the round-up operation
  • the mod represents the remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0.
  • the s_id is the identifier of the first OFDM symbol
  • the f_id is the identifier of the frequency domain
  • the ul_carrier_id is the identifier of the uplink carrier
  • the t_id is the first identifier
  • the slot_id is the identifier of the time slot
  • the x is the first value
  • the ceiling function represents a round-up operation
  • the mod represents a remainder operation.
  • the first value is the value of the period of the physical random access channel opportunity PRACH occasion for transmitting the random access preamble.
  • the identifier of the subframe where the terminal device sends the random access preamble the identifier of the frequency domain where the terminal device sends the random access preamble, and the terminal device sends the random access preamble.
  • a random access response RAR is sent to the terminal device through the communication interface 902, where the RAR is identified by the RA-RNTI.
  • the RA-RNTI 1+t_id+10 ⁇ f_id+10 ⁇ 2 k ul_carrier_id+10 ⁇ 2 k ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the subframe
  • the f_id is the frequency domain identifier
  • the ul_carrier_id is the uplink carrier identifier
  • the periodicity is the value of the period
  • the ceiling function represents the round-up operation
  • the mod represents the calculation For remainder operation
  • the k is used to represent the subcarrier spacing parameter
  • the k is an integer greater than or equal to 0
  • the y is the duration of the system frame.
  • the RA-RNTI 1+t_id+10 ⁇ f_id+80ul_carrier_id+80 ⁇ 2 ⁇ (SFN mod ceiling(periodicity/y)), where the t_id is the identifier of the subframe, and the f_id is The identifier of the frequency domain, the ul_carrier_id is the identifier of the uplink carrier, the periodicity is the value of the period, the ceiling function represents the round-up operation, the mod represents the remainder operation, and the y is The duration of the system frame.
  • processor may also cooperate with the memory and the communication interface to perform the operation of the network device in the above application embodiment.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • An embodiment of the present application also provides a communication system, which includes: the aforementioned terminal device, and/or, the aforementioned network device.

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Abstract

本申请实施例公开了一种随机接入方法、网络设备和终端设备，包括：终端设备向网络设备发送随机接入前导码；根据发送随机接入前导码的第一个正交频分复用OFDM符号的标识、发送随机接入前导码的频域的标识、发送随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，第一标识根据发送随机接入前导码的系统帧号SFN、发送随机接入前导码的时隙的标识以及第一数值中的至少一个确定，第一数值为正整数；根据RA-RNTI接收网络设备发送的随机接入响应RAR。采用本申请实施例，保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的，从而实现随机接入。

Description

一种随机接入方法、网络设备和终端设备
本申请要求于2019年04月26日提交中国专利局、申请号为201910359433.9、申请名称为“一种随机接入方法、网络设备和终端设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及网络通信技术领域，尤其涉及一种随机接入方法、网络设备和终端设备。
背景技术
在无线通信过程中，终端设备需要与网络设备通过随机接入过程获得上行同步，以便后续进行通信。在随机接入过程中，在一个随机接入响应(random access response，RAR)接收窗内(窗的最大长度为10ms时)，接收到每个RAR对应的随机接入-无线网络临时标识(random access-radio network temporary identifier，RA-RNTI)都是唯一的。但是，当RAR接收窗需要扩展到大于10ms，甚至几十毫秒的长度时，现有的计算方法无法保证计算出的RA-RNTI在扩展后的接收窗内是唯一的，因此可能造成多个UE接收同一个RAR，导致随机接入响应的接收出现混乱，影响无线通信。
发明内容
本申请实施例提供一种随机接入方法、网络设备和终端设备，保证RA-RNTI在RAR接收窗内是唯一的，从而可以正确接收RAR，成功进行随机接入。
第一方面，本申请实施例提供了一种随机接入方法，包括：终端设备向网络设备发送随机接入前导码；根据发送随机接入前导码的第一个正交频分复用OFDM符号的标识、发送随机接入前导码的频域的标识、发送随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，第一标识根据发送随机接入前导码的系统帧号SFN、发送随机接入前导码的时隙的标识以及第一数值中的至少一个确定，第一数值为正整数；最后根据RA-RNTI接收网络设备发送的随机接入响应RAR。其中，物理随机接入信道机会PRACH occasion表示可以发送随机接入前导码的时频位置，时频位置是指在时域上的位置和频域上的位置。在计算RA-RNTI时，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以减少不必要的资源浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。从而可以正确接收RAR，成功进行随机接入。
在一种可选方式中，RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，s_id为第一个OFDM符号的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，t_id为第一标识，slot_id为时隙的标识，x为第一数值，ceiling函数表示向上取整运算，mod表示求余 运算，k用于表示子载波间隔参数，k为大于等于0的整数。通过RA-RNTI的计算公式，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以减少不必要的资源浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。
在另一种可选方式中，RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，s_id为第一个OFDM符号的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，t_id为第一标识，slot_id为时隙的标识，x为第一数值，ceiling函数表示向上取整运算，mod表示求余运算。本方式中，按照一个系统帧包含80个时隙的情况，通过RA-RNTI的计算公式，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以最大限度的避免为没有配置PRACH occasion的时间单分配RA-RNTI从而造成RA-RNTI的浪费。另外SFN的引入可以保障计算出的RA-RNTI在更大的RAR接收窗内是唯一的。
在另一种可选方式中，第一数值为发送随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。采第一数值设置为周期值，可以根据PRACH occasion的周期长度动态分配RA-RNTI，增加RA-RNTI计算的灵活性。
在另一种可选方式中，PRACH occasion的周期的值periodicity大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，保证网络设备能够区分出接收到的随机接入前导码所对应的PRACH occasion。
在另一种可选方式中，终端设备可以在RAR接收窗根据计算出的RA-RNTI对网络设备发送的RAR进行接收，如果网络设备标识RAR使用的RA-RNTI与终端设备接收RAR使用的RA-RNTI相同，则可以接收到RAR。具体的，网络设备利用PDCCH对RAR进行调度，其中PDCCH上传输的下行控制信息(downlink control information，DCI)利用RA-RNTI加扰，终端设备接收到DCI之后可以根据RA-RNTI解出接收RAR的时频位置，从而可以相应地接收RAR。
在另一种可选方式中，RAR接收窗的长度大于等于最大单向传播时延减去最小单向传播时延的差值的两倍。保障终端设备可以在RAR接收窗内可以接收到RAR。
在另一种可选方式中，RAR接收窗的长度可以等于最大单向传播时延减去最小单向传播时延的差值的两倍加上一个固定时间值，其中，该固定时间值可以根据网络设备发送的RRC信令中的指示信息确定。一方面RAR接收窗长度需要考虑不同终端设备到网络设备的传播时延差，另一方面需要考虑网络设备的调度时机的灵活性(配置的固定时间值)，从而保障终端设备可以在RAR接收窗内可以接收到RAR。
第二方面，本申请实施例提供了一种随机接入方法，包括：终端设备向网络设备发送随机接入前导码；根据发送随机接入前导码的子帧的标识、发送随机接入前导码的频域的标识、发送随机接入前导码的上行载波的标识、发送随机接入前导码的系统帧号SFN以及发送随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；最后根据RA-RNTI接收网络设备发送的随机接入响应RAR。在计算RA-RNTI时，通过将周期性配置的PRACH occasion变成时 域上连续的PRACH occasion，这样可以连续分配RA-RNTI，而没有配置PRACH occasion的单位时间内就不再分配RA-RNTI，保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。从而可以正确接收RAR，成功进行随机接入。
在一种可选方式中，RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，t_id为子帧的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，periodicity为周期的值，ceiling函数表示向上取整运算，mod表示求余运算，k用于表示子载波间隔参数，k为大于等于0的整数，y为系统帧的时长。通过RA-RNTI的计算公式，假设最小需要考虑的时间单位是子帧，即一个子帧内最多只可能配置一个PRACH Occasion，这样可以保证不会为更细粒度的时间单位分配RA-RNTI，从而避免了RA-RNTI的浪费。同时引入SFN对不同SFN内的子帧进行区分，保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。另外需要说明的是，本发明的ceiling(periodicity/y)中，y的含义随着periodicity的单位而变，假设periodicity的单位是毫秒，则y的单位也是毫秒；而假设periodicity的单位是子帧，则y的单位也是子帧，此时，由于系统帧为10个子帧，所以y的数值可以为10。总体来说，periodicity/y表示的含义是一个周期的长度涉及到了几个系统帧，也可以理解为一个周期的长度跨了几个系统帧，所有体现该思想的表达方式都落在本发明的保护范围之内。
在另一种可选方式中，RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，t_id为子帧的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，periodicity为周期的值，ceiling函数表示向上取整运算，mod表示求余运算，y为系统帧的时长。按照一个系统帧包含80个时隙的情况，通过RA-RNTI的计算公式，假设最小需要考虑的时间单位是子帧，即一个子帧内最多只可能配置一个PRACH Occasion，这样可以保证不会为更细粒度的时间单位分配RA-RNTI，从而避免了RA-RNTI的浪费。同时引入SFN对不同SFN内的子帧进行区分，保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。
在另一种可选方式中，PRACH occasion的周期的值periodicity大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，保证网络设备能够区分出接收到的随机接入前导码所对应的PRACH occasion。
在另一种可选方式中，终端设备可以在RAR接收窗根据计算出的RA-RNTI对网络设备发送的RAR进行接收，如果网络设备标识RAR使用的RA-RNTI与终端设备接收RAR使用的RA-RNTI相同，则可以接收到RAR。具体的，网络设备利用PDCCH对RAR进行调度，其中PDCCH上传输的下行控制信息(downlink control information，DCI)利用RA-RNTI加扰，终端设备接收到DCI以后可以根据RA-RNTI解出接收RAR的时频位置，从而可以相应地接收RAR。
在另一种可选方式中，RAR接收窗的长度大于等于最大单向传播时延减去最小单向传播时延的差值的两倍。保障终端设备可以在RAR接收窗内可以接收到RAR。
在另一种可选方式中，RAR接收窗的长度可以等于最大单向传播时延减去最小单向传播时延的差值的两倍加上一个固定时间值，其中，该固定时间值可以根据网络设备发送的RRC信令中的指示信息确定。一方面RAR接收窗长度需要考虑不同终端设备到网络 设备的传播时延差，另一方面需要考虑网络设备的调度时机的灵活性(配置的固定时间值)，从而保障终端设备可以在RAR接收窗内可以接收到RAR。
第三方面，本申请实施例提供了一种随机接入方法，包括：网络设备接收终端设备发送的随机接入前导码；根据终端设备发送随机接入前导码的第一个正交频分复用OFDM符号的标识、终端设备发送随机接入前导码的频域的标识、终端设备发送随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，第一标识根据终端设备发送随机接入前导码的系统帧号SFN、终端设备发送随机接入前导码的时隙的标识以及第一数值中的至少一个确定，第一数值为正整数；最后向终端设备发送随机接入响应RAR，RAR通过RA-RNTI标识。在计算RA-RNTI时，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以减少不必要的资源浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。
在一种可选方式中，RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，s_id为第一个OFDM符号的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，t_id为第一标识，slot_id为时隙的标识，x为第一数值，ceiling函数表示向上取整运算，mod表示求余运算，k用于表示子载波间隔参数，k为大于等于0的整数。通过RA-RNTI的计算公式，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以减少不必要的资源浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。
在另一种可选方式中，RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，s_id为第一个OFDM符号的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，t_id为第一标识，slot_id为时隙的标识，x为第一数值，ceiling函数表示向上取整运算，mod表示求余运算。本方式中，按照一个系统帧包含80个时隙的情况，通过RA-RNTI的计算公式，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以最大限度的避免为没有配置PRACH occasion的时间单分配RA-RNTI从而造成RA-RNTI的浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。
在另一种可选方式中，第一数值为发送随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。减少计算RA-RNTI的复杂度。
在另一种可选方式中，PRACH occasion的周期的值periodicity大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，保证网络设备能够区分出接收到的随机接入前导码所对应的PRACH occasion。
在另一种可选方式中，网络设备可以广播最大单向传播时延和最小单向传播时延，也可以通过RRC信令向终端设备发送指示信息，该指示信息用于通知终端设备与网络设备之间的最大单向传播时延和最小单向传播时延。使得终端设备可以根据最大单向传播时延和最小单向传播时延确定PRACH occasion的周期的值periodicity。
第四方面，本申请实施例提供了一种随机接入方法，包括：网络设备接收终端设备发送的随机接入前导码；根据终端设备发送随机接入前导码的子帧的标识、终端设备发送随机接入前导码的频域的标识、终端设备发送随机接入前导码的上行载波的标识、终端设备发送随机接入前导码的系统帧号SFN以及终端设备发送随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；最后向终端设备发送随机接入响应RAR，RAR通过RA-RNTI标识。在计算RA-RNTI时，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以减少不必要的资源浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。
在另一种可选方式中，RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，t_id为子帧的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，periodicity为周期的值，ceiling函数表示向上取整运算，mod表示求余运算，k用于表示子载波间隔参数，k为大于等于0的整数，y为系统帧的时长。通过RA-RNTI的计算公式，假设最小需要考虑的时间单位是子帧，即一个子帧内最多只可能配置一个PRACH occasion，这样可以保证不会为更细粒度的时间单位分配RA-RNTI，从而避免了RA-RNTI的浪费。同时引入SFN对不同SFN内的子帧进行区分，保障计算出的RA-RNTI在更大的RAR接收窗内是唯一的。
在另一种可选方式中，RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，t_id为子帧的标识，f_id为频域的标识，ul_carrier_id为上行载波的标识，periodicity为周期的值，ceiling函数表示向上取整运算，mod表示求余运算，y为系统帧的时长。按照一个系统帧包含80个时隙的情况，通过RA-RNTI的计算公式，假设最小需要考虑的时间单位是子帧，即一个子帧内最多只可能配置一个PRACH Occasion，这样可以保证不会为更细粒度的时间单位分配RA-RNTI，从而避免了RA-RNTI的浪费。同时引入SFN对不同SFN内的子帧进行区分，保障计算出的RA-RNTI在更大的RAR接收窗内是唯一的。
在另一种可选方式中，PRACH occasion的周期的值periodicity大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，保证网络设备能够区分出接收到的随机接入前导码所对应的PRACH occasion。
在另一种可选方式中，网络设备可以广播最大单向传播时延和最小单向传播时延，也可以通过RRC信令向终端设备发送指示信息，该指示信息用于通知终端设备与网络设备之间的最大单向传播时延和最小单向传播时延。使得终端设备可以根据最大单向传播时延和最小单向传播时延确定PRACH occasion的周期的值periodicity。
第五方面，本申请实施例提供了一种终端设备，该终端设备被配置为实现上述第一方面和第二方面中终端设备所执行的方法和功能，由硬件/软件实现，其硬件/软件包括与上述功能相应的模块。
第六方面，本申请实施例提供了一种网络设备，该网络设备被配置为实现上述第三方面和第四方面中网络设备所执行的方法和功能，由硬件/软件实现，其硬件/软件包括与 上述功能相应的模块。
第七方面，本申请实施例提供了另一种终端设备，包括：处理器、存储器和通信总线，其中，通信总线用于实现处理器和存储器之间连接通信，处理器执行存储器中存储的程序用于实现上述第一方面和第二方面提供的一种随机接入方法中的步骤。
在一个可能的设计中，本申请提供的终端设备可以包含用于执行上述方法设计中终端设备的行为相对应的模块。模块可以是软件和/或是硬件。
第八方面，本申请实施例提供了另一种网络设备，包括：处理器、存储器和通信总线，其中，通信总线用于实现处理器和存储器之间连接通信，处理器执行存储器中存储的程序用于实现上述第三方面和第四方面提供的一种随机接入方法中的步骤。
在一个可能的设计中，本申请提供的网络设备可以包含用于执行上述方法设计中网络设备的行为相对应的模块。模块可以是软件和/或是硬件。
第九方面，本申请提供了一种计算机可读存储介质，计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面的方法。
第十方面，本申请提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面的方法。
第十一方面，本申请实施例提供了一种通信系统，该通信系统包括上述第五方面以及第七方面所述的终端设备、和第六方面以及第八方面所述的网络设备。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1是本申请实施例提供的一种通信系统的架构示意图；
图2是本申请实施例提供的一种无线接入方法的流程示意图；
图3是本申请实施例提供的一种NTN场景的示意图；
图4是本申请实施例提供的一种PRACH occasion的周期的配置示意图；
图5是本申请实施例提供的另一种无线接入方法的流程示意图；
图6是本申请实施例提供的一种终端设备的结构示意图；
图7是本申请实施例提供的一种网络设备的结构示意图；
图8是本申请实施例提供的另一种终端设备的结构示意图；
图9是本申请实施例提供的另一种网络设备的结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
如图1所示，图1是本申请实施例提供的一种通信系统的架构示意图。该通信系统100可以包括网络设备110和终端设备101～终端设备106。应理解，该通信系统100中可以包括更多或更少的网络设备或终端设备。网络设备或终端设备可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。此外，终端设备104～终端设备106也可以组成一个通信系统，例如终端设备105可以发送下行数据给终端设备104或终端设备106。网 络设备与终端设备之间可以通过其他设备或网元通信。网络设备110可以向终端设备101～终端设备106发送下行数据，也可以接收终端设备101～终端设备106发送的上行数据。当然，终端设备101～终端设备106也可以向网络设备110发送上行数据，也可以接收网络设备110发送的下行数据。终端设备101～终端设备106可以是用户设备(user equipment，UE)、蜂窝电话、智能电话、便携式电脑、手持通信设备、手持计算设备、卫星无线电装置、全球定位系统、掌上电脑(personal digital assistant，PDA)和/或用于在无线通信系统100上通信的任意其它适合设备等等。网络设备110可以是用于与终端设备通信的设备，可以为接入点、中继节点、基站收发台(base transceiver station，BTS)、节点B(nodeB，NB)、演进型节点(evolved node B，eNB)或5G基站(gNB)，指在空中接口上通过一个或多个扇区与终端设备进行通信的接入网络中的设备。
该通信系统100可以采用公共陆地移动网络(public land mobile network，PLMN)、设备到设备(device-to-device，D2D)网络、机器到机器(machine to machine，M2M)网络、物联网(internet of things，IoT)或者其他网络。该通信系统100可以应用于第五代移动通信技术(5th generation，5G)新无线(new radio，NR)系统，也可以应用于非地面通信网络，例如基站在卫星或者其他飞行设备上的通信网络，或者以卫星、飞行设备等作为中继转发的通信网络。也可以应用于基于5G架构的、利用非授权频谱进行通信的场景。
本申请实施例涉及随机接入过程，以下对随机接入过程进行介绍：
终端设备首先向网络设备发送随机接入前导码(random access preamble，RAP)，终端设备发送随机接入前导码之后，可以计算一个RA-RNTI。网络设备接收到随机接入前导码之后，确定终端设备请求随机接入，并且可以估计出终端设备与网络设备之间的传输时延，也可以计算出一个RA-RNTI，然后向终端设备发送随机接入响应(random access response，RAR)，并使用RA-RNTI对RAR进行标识。终端设备在RAR接收窗内监听物理下行控制信道(physical downlink control channel，PDCCH)，使用自己计算出的RA-RNTI对DCI进行解码，然后去接收相应的RAR。如果网络设备标识RAR使用的RA-RNTI与终端设备接收RAR使用的RA-RNTI相同，则可以正确接收RAR。如果无法正确接收RAR，则说明在此RAR接收窗内没有接收到网络设备发送的RAR，确定此次随机接入过程失败。
在随机接入过程中，RA-RNTI的值是由随机接入前导码的物理随机接入信道机会(physical random access channel occasion，PRACH occasion)的时频位置决定的。其中，时频位置是指随机接入前导码在时域上的位置和频域上的位置。终端设备发送随机接入前导码之后，可以根据发送随机接入前导码的时频位置等信息计算出一个RA-RNTI，然后在RAR时间窗内根据该RA-RNTI接收对应的RAR。其中，RA-RNTI与PRACH occasion一一对应，终端设备确定在哪个PRACH occasion发送的随机接入前导码，因此可以计算出一个RA-RNTI。网络设备接收到随机接入前导码之后，也可以根据该PRACH occasion的时频位置计算得出一个相同的RA-RNTI，RAR通过该RA-RNTI标识。
其中，RA-RNTI的计算公式如下：RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，s_id表示随机接入前导码的第一个正交频分复用(orthogonal  frequency division multiplexing，OFDM)符号的标识(0≤s_id<14)，t_id为发送所述随机接入前导码的时隙的标识(0≤t_id<80)，f_id为发送随机接入前导码的频域的标识(0≤f_id<8)，ul_carrier_id发送所述随机接入前导码的上行载波的标识(0或者1)。
通过计算公式计算出的RA-RNTI，可以保证在一个RAR接收窗内(最大长度为10ms)接收到的每个RAR对应的RA-RNTI都是唯一的。也即在一个10ms的RAR接收窗内，每个单位时间内接收到的RAR对应唯一的RA-RNTI。如果10ms的RAR接收窗内有100个单位时间，就有100个RA-RNTI。如果RAR接收窗的长度扩展到20ms，就有200个单位时间，在这种情况下，100个RA-RNTI就无法保证每个单位时间都有唯一的RA-RNTI。在一些通信场景中，例如非授权频谱通信场景或者非陆地网络(non-terrestrial networks，NTN)场景，RAR接收窗需要扩展到大于10ms，甚至几十毫秒的长度。现有的计算方法无法保证计算出的RA-RNTI在扩展后的接收窗内是唯一的，因此可能造成多个UE接收同一个RAR，导致随机接入响应的接收出现混乱，影响无线通信。为了解决上述技术问题，本申请实施例提供了如下解决方案。
如图2所示，图2是本申请实施例提供的一种无线接入方法的流程示意图。本申请实施路中的步骤至少包括：
S201，终端设备向网络设备发送随机接入前导码，网络设备接收终端设备发送的随机接入前导码。
S202，终端设备根据发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据发送所述随机接入前导码的系统帧号(system frame number，SFN)、发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数。包括以下几种可选方式：
在一种可选方式中，RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，0≤s_id<14。所述f_id为所述频域的标识，0≤f_id<8。所述ul_carrier_id为所述上行载波的标识，ul_carrier_id＝0或者1。所述t_id为所述第一标识，0≤t_id<10×2 k，，所述slot_id为所述时隙的标识，0≤slot_id<80。所述x为所述第一数值，第一数值可以为发送随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值periodicity，也可以为赋值的一个正整数，该第一数值的单位为时隙。所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数(sub-carrier space，SCS)，所述k为大于等于0的整数。当k＝0时，表示SCS＝15×2 0＝15kHz，当k＝1时，表示SCS＝15×2 1＝30kHz，以此类推。
对于上述计算公式，在系统帧包含80个时隙的情况下，也即k＝3时，RA-RNTI＝1+s_id+14×t_id+14×10×8×f_id+14×80×8×ul_carrier_id，t_id＝ceiling((SFN×80+slot_id)/x)mod(80)。进一步的，第一数值x可以为发送随机接入前导码的PRACH occasion的周期的值periodicity，在PRACH occasion的周期的值配置最短的情况下，也即x＝2时， RA-RNTI＝1+s_id+14×t_id+14×10×8×f_id+14×80×8×ul_carrier_id，t_id＝ceiling((SFN×80+slot_id)/2)mod(80)。应注意，当x＝1时，t_id＝ceiling(SFN×80+slot_id)mod(80)＝slot_id，代入上述计算公式得到：RA-RNTI＝1+s_id+14×slot_id+14×10×8×f_id+14×80×8×ul_carrier_id，与前面给出的在RAR接收窗的长度不大于10ms时的RA-RNTI的计算公式相同。因此本申请实施例计算出的RA-RNTI可以同时满足RAR接收窗的长度不大于10ms的情况和RAR接收窗的长度大于10ms的情况。
本申请实施例也给出了其他几种情况，包括：
当k＝2时，RA-RNTI＝1+s_id+14×t_id+14×10×4×f_id+14×40×8×ul_carrier_id，t_id＝ceiling((SFN×40+slot_id)/x)mod(40)。
当k＝1时，RA-RNTI＝1+s_id+14×t_id+14×20×f_id+14×20×8×ul_carrier_id，t_id＝ceiling((SFN×20+slot_id)/x)mod(20)。
当k＝0时，RA-RNTI＝1+s_id+14×t_id+14×10×f_id+14×10×8×ul_carrier_id，t_id＝ceiling((SFN×10+slot_id)/x)mod(10)。
在另一种可选方式中，本申请实施例也提供了几种与k无关的RA-RNTI的计算公式，至少包括：
RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，0≤s_id<14。所述f_id为所述频域的标识，0≤f_id<8。所述ul_carrier_id为所述上行载波的标识(0或者1)，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，0≤slot_id<80。所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
RA-RNTI＝1+s_id+14×t_id+14×10×4×f_id+14×40×8×ul_carrier_id，其中，t_id＝ceiling((SFN×40+slot_id)/x)mod(40)。
RA-RNTI＝1+s_id+14×t_id+14×20×f_id+14×20×8×ul_carrier_id，其中，t_id＝ceiling((SFN×20+slot_id)/x)mod(20)。
RA-RNTI＝1+s_id+14×t_id+14×10×f_id+14×10×8×ul_carrier_id，其中，t_id＝ceiling((SFN×10+slot_id)/x)mod(10)。
可选的，第一数值可以为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值periodicity。其中，PRACH occasion的周期的值periodicity大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，保证网络设备能够区分出接收到的随机接入前导码所对应的PRACH occasion。具体的，网络设备可以广播最大单向传播时延和最小单向传播时延，也可以通过无线资源控制(radio resource control，RRC)信令向终端设备发送指示信息，该指示信息用于通知终端设备与网络设备之间的最大单向传播时延和最小单向传播时延。终端设备可以根据最大单向传播时延和最小单向传播时延确定PRACH occasion的周期的值periodicity。
例如，如图3所示，在NTN场景下，由于基站与不同UE之间的距离差很大，在同一个小区内，不同UE到基站的传播时延可能差别很大，因此随机接入前导码的PRACH occasion的时频位置和RAR接收窗都需要考虑在同一个基站的信号覆盖范围内的所有不 同位置的UE。在实际应用中，可以只考虑距离基站最远的UE和距离基站最近的UE，根据最远的UE与基站之间的距离确定单向传播最大时延，根据最近的UE与基站之间的距离确定单向传播最小时延。其他UE都包含在此范围内。
又如图4所示，图4是本申请实施例提供的一种PRACH occasion的周期的配置示意图。如果PRACH occasion的周期的值periodicity不小于(最大单向传播时延-最小单向传播时延)*2，并且PRACH occasion的周期的值大于等于基站接收随机接入前导码的接收窗的长度，那么基站接收随机接入前导码的接收窗1和接收窗2可以错开，如果PRACH occasion的周期的值小于(最大单向传播时延-最小单向传播时延)*2，则接收窗2的起始位置需要前移，导致接收窗1和接收窗2之间出现重叠区域。如果基站在重叠区域接收到终端设备发送的随机接入前导码，就无法确定该随机接入前导码是从哪个PRACH occasion上发送的。因此，只有在periodicity不小于(最大单向传播时延-最小单向传播时延)*2，并且PRACH occasion的周期的值大于等于基站接收随机接入前导码的接收窗的长度的情况下，可以保障在每个随机接入前导码接收窗只接收到一个随机接入前导码。
网络设备在接收到随机接入前导码之后，可以根据所述终端设备发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据所述终端设备发送所述随机接入前导码的系统帧号SFN、所述终端设备发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数。网络设备计算RA-RNTI的具体方法与终端设备计算RA-RNTI的方法相同，此处不再赘述。网络设备可以通过计算出的RA-RNTI对RAR进行标识，然后向终端设备发送通过RA-RNTI标识的RAR。具体的，RAR通过RA-RNTI标识可以是网络设备利用PDCCH对RAR进行调度，其中PDCCH上传输的DCI利用RA-RNTI加扰。
S203，网络设备向终端设备发送随机接入响应RAR，终端设备根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
具体实现中，终端设备可以在RAR接收窗根据计算出的RA-RNTI对网络设备发送的RAR进行接收，如果网络设备标识RAR使用的RA-RNTI与终端设备接收RAR使用的RA-RNTI相同，则可以接收到RAR。具体的，网络设备利用PDCCH对RAR进行调度，其中PDCCH上传输的DCI利用RA-RNTI加扰，终端设备接收到DCI之后可以根据RA-RNTI解出接收RAR的时频位置，从而可以相应地接收RAR。其中，RAR接收窗的长度大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，也可以大于等于最大单向传播时延减去最小单向传播时延的差值的两倍加上一个固定时间值，其中，该固定时间值可以根据网络设备发送的RRC信令中的指示信息确定。UE发送随机接入前导码的时间到UE接收RAR的时间的第一时间差可以大于等于单向传播时延*2，该固定时间值可以为基站接收随机接入前导码的时间到基站发送RAR的时间差值，该固定时间值大于等于0。对于小区内的不同UE来说，由于与基站之间的单向传播时延存在差异，所以不同UE间的第一时间差的最大差异为最大单向传播时延减去最小单向传播时延的差值的两倍。将与基站距离最近的UE的最小单向传播时延的二倍作为补偿值，则UE的RAR 接收窗的时间应该大于等于最大单向传播时延减去最小单向传播时延的差值的两倍加上一个固定时间值。将与基站距离最近的UE的最小单向传播时延的二倍加上该固定时间值作为补偿值，则UE的RAR接收窗的时间应该大于等于最大单向传播时延减去最小单向传播时延的差值的两倍。如果RAR接收窗的长度小于最大单向传播时延减去最小单向传播时延的差值的两倍，则在RAR传播过程中RAR接收窗就已经关闭，导致无法接收到RAR。
在本申请实施例中，在计算RA-RNTI时，仅仅为周期性配置的PRACH occasion分配了RA-RNTI，而没有配置PRACH occasion的时间单位就不再分配RA-RNTI，这样可以减少不必要的资源浪费。另外SFN的引入可以保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的，并且RA-RNTI个数没有增加，从而可以正确接收RAR，成功进行随机接入。
如图5所示，图5是本申请实施例提供的另一种无线接入方法的流程示意图。本申请实施路中的步骤至少包括：
S501，终端设备向网络设备发送随机接入前导码，网络设备接收终端设备发送的随机接入前导码。
S502，终端设备根据发送所述随机接入前导码的子帧的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识、发送所述随机接入前导码的系统帧号SFN以及发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI。包括以下几种可选方式：
在一种可选方式中，RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，0≤t_id<10。所述f_id为所述频域的标识，0≤f_id<8。所述ul_carrier_id为所述上行载波的标识，ul_carrier_id等于0或1。所述periodicity为所述周期的值，单位为子帧(subframe)。所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长，单位为ms，例如y可以为10。当k＝0时，表示SCS＝15×2 0＝15kHz，当k＝1时，表示SCS＝15×2 1＝30kHz，以此类推。
对于上述计算公式，在系统帧包含80个时隙的情况下，也即k＝3时，RA-RNTI＝1+t_id+10×f_id+10×8×ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))。本申请实施例也给出了其他几种情况，包括：
当k＝2时，RA-RNTI＝1+t_id+10×f_id+10×4×ul_carrier_id+40×2×(SFN mod ceiling(periodicity/y))。
当k＝1时，RA-RNTI＝1+t_id+10×f_id+10×2×ul_carrier_id+20×2×(SFN mod ceiling(periodicity/y))。
当k＝0时，RA-RNTI＝1+t_id+10×f_id+10×ul_carrier_id+10×2×(SFN mod ceiling(periodicity/y))。
在另一种可选方式中，本申请实施例也提供了几种与k无关的RA-RNTI的计算公式， 至少包括：
RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，0≤t_id<10。所述f_id为所述频域的标识，0≤f_id<8。所述ul_carrier_id为所述上行载波的标识，ul_carrier_id等于0或1，所述periodicity为所述周期的值。所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长，单位为ms，例如y可以为10。
RA-RNTI＝1+t_id+10×f_id+10×4×ul_carrier_id+40×2×(SFN mod ceiling(periodicity/y))。
RA-RNTI＝1+t_id+10×f_id+10×2×ul_carrier_id+20×2×(SFN mod ceiling(periodicity/y))。
RA-RNTI＝1+t_id+10×f_id+10×ul_carrier_id+10×2×(SFN mod ceiling(periodicity/y))。
需要说明的是，在某些场景(例如NTN场景)下，PRACH occasion的周期在时域上无法配置到符号甚至时隙这么短的时间粒度，很可能在一个子帧上最多只能配置一个PRACH occasion，因此在计算RA-RNTI时无需体现代表符号和时隙的参数，只需体现到子帧粒度即可。本申请实施例在子帧粒度上对RA-RNTI进行计算。
其中，PRACH occasion的周期的值periodicity大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，保证网络设备能够区分出接收到的随机接入前导码所对应的PRACH occasion。具体的，网络设备可以广播最大单向传播时延和最小单向传播时延，也可以通过RRC信令向终端设备发送指示信息，该指示信息用于通知终端设备与网络设备之间的最大单向传播时延和最小单向传播时延。终端设备可以根据最大单向传播时延和最小单向传播时延确定PRACH occasion的周期的值periodicity。
例如，如图3所示，在NTN场景下，由于基站与不同UE之间的距离差很大，在同一个小区内，不同UE到基站的传播时延可能差别很大，因此随机接入前导码的PRACH occasion的时频位置和RAR接收窗都需要考虑在同一个基站的信号覆盖范围内的所有的不同位置的UE。在实际应用中，可以只考虑距离基站最远的UE和距离基站最近的UE，根据最远的UE与基站之间的距离确定单向传播最大时延，根据最近的UE与基站之间的距离确定单向传播最小时延。其他UE都包含在此范围内。
又如图4所示，如果PRACH occasion的周期的值periodicity不小于(最大单向传播时延-最小单向传播时延)*2，并且PRACH occasion的周期的值大于等于基站接收随机接入前导码的接收窗的长度，那么基站接收随机接入前导码的PRACH occasion的接收窗1和接收窗2可以错开，如果PRACH occasion的周期的值小于(最大单向传播时延-最小单向传播时延)*2，则接收窗2的起始位置需要前移，导致接收窗1和接收窗2之间出现重叠区域。如果基站在重叠区域接收到终端设备发送的随机接入前导码，就无法确定该随机接入前导码是从哪个PRACH occasion上发送的。因此，只有在periodicity不小于(最大单向传播时延-最小单向传播时延)*2，并且PRACH occasion的周期的值大于等于基站接收随机接入前导码的接收窗的长度的情况下，可以保障在每个随机接入前导码接收窗只接收到一个随机接入前导码。
网络设备接收到随机接入前导码之后，可以根据所述终端设备发送所述随机接入前导码的子帧的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识、所述终端设备发送所述随机接入前导码的系统帧号SFN以及所述终端设备发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI。网络设备计算RA-RNTI的具体方法与终端设备计算RA-RNTI的方法相同，此处不再赘述。网络设备可以通过计算出的RA-RNTI对RAR进行标识，然后向终端设备发送通过RA-RNTI标识的RAR。具体的，RAR通过RA-RNTI标识可以是网络设备利用PDCCH对RAR进行调度，其中PDCCH上传输的DCI利用RA-RNTI加扰。
S503，网络设备向终端设备发送随机接入响应RAR，终端设备根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
具体实现中，终端设备可以在RAR接收窗根据计算出的RA-RNTI对网络设备发送的RAR进行接收，如果网络设备标识RAR使用的RA-RNTI与终端设备接收RAR使用的RA-RNTI相同，则可以接收到RAR。具体的，网络设备利用PDCCH对RAR进行调度，其中PDCCH上传输的DCI利用RA-RNTI加扰，终端设备接收到DCI之后可以根据RA-RNTI解出接收RAR的时频位置，从而可以相应地接收RAR。其中，RAR接收窗的长度大于等于最大单向传播时延减去最小单向传播时延的差值的两倍，也可以大于等于最大单向传播时延减去最小单向传播时延的差值的两倍加上一个固定时间值，其中，该固定时间值可以根据网络设备发送的RRC信令中的指示信息确定。UE发送随机接入前导码的时间到UE接收RAR的时间的第一时间差可以大于等于单向传播时延*2，该固定时间值可以为基站接收随机接入前导码的时间到基站发送RAR的时间差值，该固定时间值大于等于0。对于小区内的不同UE来说，由于与基站之间的单向传播时延存在差异，所以不同UE间的第一时间差的最大差异为最大单向传播时延减去最小单向传播时延的差值的两倍。将与基站距离最近的UE的最小单向传播时延的二倍作为补偿值，则UE的RAR接收窗的时间应该大于等于最大单向传播时延减去最小单向传播时延的差值的两倍加上一个固定时间值。将与基站距离最近的UE的最小单向传播时延的二倍加上该固定时间值作为补偿值，则UE的RAR接收窗的时间应该大于等于最大单向传播时延减去最小单向传播时延的差值的两倍。如果RAR接收窗的长度小于最大单向传播时延减去最小单向传播时延的差值的两倍，则在RAR传播过程中RAR接收窗就已经关闭，导致无法接收到RAR。
在本申请实施例中，通过RA-RNTI的计算公式，假设最小需要考虑的时间单位是子帧，即一个子帧内最多只可能配置一个PRACH Occasion，这样可以保证不会为更细粒度的时间单位分配RA-RNTI，从而避免了RA-RNTI的浪费。同时引入SFN对不同SFN内的子帧进行区分，保证在RAR接收窗大于10ms时，计算出的RA-RNTI在RAR接收窗内是唯一的。从而可以正确接收RAR，成功进行随机接入。
上述详细阐述了本申请实施例的方法，下面提供了本申请实施例的装置。
请参见图6，图6是本申请实施例提供的一种终端设备的结构示意图，该终端设备可 以包括发送模块601、处理模块602以及接收模块603，其中，各个模块的详细描述如下。
发送模块601，用于向网络设备发送随机接入前导码。
处理模块602，用于根据发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据发送所述随机接入前导码的系统帧号SFN、发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数。
接收模块603，用于根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
其中，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
在另一个实施例中：
发送模块601，用于向网络设备发送随机接入前导码；
处理模块602，用于根据发送所述随机接入前导码的子帧的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识、发送所述随机接入前导码的系统帧号SFN以及发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
接收模块603，用于根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
其中，所述RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
其中，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
需要说明的是，各个模块的实现还可以对应参照图2和图5所示的方法实施例的相应 描述，执行上述实施例中终端设备所执行的方法和功能。
请参见图7，图7是本申请实施例提供的一种网络设备的结构示意图，该网络设备可以包括接收模块701、处理模块702以及发送模块703，其中，各个模块的详细描述如下。
接收模块701，用于接收终端设备发送的随机接入前导码；
处理模块702，用于根据所述终端设备发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据所述终端设备发送所述随机接入前导码的系统帧号SFN、所述终端设备发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
发送模块703，用于向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
其中，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
在另一个实施例中：
接收模块701，用于接收终端设备发送的随机接入前导码；
处理模块702，用于根据所述终端设备发送所述随机接入前导码的子帧的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识、所述终端设备发送所述随机接入前导码的系统帧号SFN以及所述终端设备发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
发送模块703，用于向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
其中，所述RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述 ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
其中，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
需要说明的是，各个模块的实现还可以对应参照图2和图5所示的方法实施例的相应描述，执行上述实施例中网络设备所执行的方法和功能。
请继续参考图8，图8是本申请实施例提出的另一种终端设备的结构示意图。如图8所示，该终端设备可以包括：至少一个处理器801，至少一个通信接口802，至少一个存储器803和至少一个通信总线804。
其中，处理器801可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。通信总线804可以是外设部件互连标准PCI总线或扩展工业标准结构EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图8中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。通信总线804用于实现这些组件之间的连接通信。其中，本申请实施例中设备的通信接口802用于与其他节点设备进行信令或数据的通信。存储器803可以包括易失性存储器，例如非挥发性动态随机存取内存(nonvolatile random access memory，NVRAM)、相变化随机存取内存(phase change RAM，PRAM)、磁阻式随机存取内存(magetoresistive RAM，MRAM)等，还可以包括非易失性存储器，例如至少一个磁盘存储器件、电子可擦除可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、闪存器件，例如反或闪存(NOR flash memory)或是反及闪存(NAND flash memory)、半导体器件，例如固态硬盘(solid state disk，SSD)等。存储器803可选的还可以是至少一个位于远离前述处理器801的存储装置。存储器803中可选的还可以存储一组程序代码，且处理器801可选的还可以执行存储器803中所执行的程序。
通过通信接口802向网络设备发送随机接入前导码；
根据发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据发送所述随机接入前导码的系统帧号SFN、发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
通过通信接口802根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×8×2 k×f_id+14×8×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×8×2 k+slot_id)/x)mod(8×2 k)，其中，所述s_id为所述 第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
其中，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
在另一个实施例中：
通过通信接口802向网络设备发送随机接入前导码；
根据发送所述随机接入前导码的子帧的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识、发送所述随机接入前导码的系统帧号SFN以及发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
通过通信接口802根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
其中，所述RA-RNTI＝1+t_id+8×f_id+8×2 k ul_carrier_id+8×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
其中，所述RA-RNTI＝1+t_id+8×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
进一步的，处理器还可以与存储器和通信接口相配合，执行上述申请实施例中终端设备的操作。
请继续参考图9，图9是本申请实施例提出的另一种网络设备的结构示意图。如图所示，该网络设备可以包括：至少一个处理器901，至少一个通信接口902，至少一个存储器903和至少一个通信总线904。
其中，处理器901可以是前文提及的各种类型的处理器。通信总线904可以是外设部件互连标准PCI总线或扩展工业标准结构EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图9中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。通信总线904用于实现这些组件之间的连接通信。其中，本申请实施例中设备的通信接口902用于与其他节点设备进行信令或数据的通信。存储器903可以是 前文提及的各种类型的存储器。存储器903可选的还可以是至少一个位于远离前述处理器901的存储装置。存储器903中存储一组程序代码，且处理器901执行存储器903中上述OAM所执行的程序。
通过通信接口902接收终端设备发送的随机接入前导码；
根据所述终端设备发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据所述终端设备发送所述随机接入前导码的系统帧号SFN、所述终端设备发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
通过通信接口902向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
其中，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
其中，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
在另一个实施例中：
通过通信接口902收终端设备发送的随机接入前导码；
根据所述终端设备发送所述随机接入前导码的子帧的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识、所述终端设备发送所述随机接入前导码的系统帧号SFN以及所述终端设备发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
通过通信接口902向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
其中，所述RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参 数，所述k为大于等于0的整数，所述y为系统帧的时长。
其中，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
进一步的，处理器还可以与存储器和通信接口相配合，执行上述申请实施例中网络设备的操作。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk(SSD))等。
本申请实施例还提供了一种通信系统，该通信系统包括：上述终端设备，和/或，上述网络设备。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (33)

  1. 一种随机接入方法，其特征在于，包括：
    终端设备向网络设备发送随机接入前导码；
    所述终端设备根据发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据发送所述随机接入前导码的系统帧号SFN、发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
    所述终端设备根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
  2. 如权利要求1所述的方法，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
  3. 如权利要求1所述的方法，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
  4. 如权利要求1-3任一项所述的方法，其特征在于，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
  5. 一种随机接入方法，其特征在于，包括：
    终端设备向网络设备发送随机接入前导码；
    所述终端设备根据发送所述随机接入前导码的子帧的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识、发送所述随机接入前导码的系统帧号SFN以及发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
    所述终端设备根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
  6. 如权利要求5所述的方法，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+10×2 k ul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
  7. 如权利要求5所述的方法，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
  8. 一种随机接入方法，其特征在于，包括：
    网络设备接收终端设备发送的随机接入前导码；
    所述网络设备根据所述终端设备发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据所述终端设备发送所述随机接入前导码的系统帧号SFN、所述终端设备发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
    所述网络设备向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
  9. 如权利要求8所述的方法，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
  10. 如权利要求8所述的方法，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
  11. 如权利要求8-10任一项所述的方法，其特征在于，所述第一数值为发送所述随 机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
  12. 一种随机接入方法，其特征在于，包括：
    网络设备接收终端设备发送的随机接入前导码；
    所述网络设备根据所述终端设备发送所述随机接入前导码的子帧的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识、所述终端设备发送所述随机接入前导码的系统帧号SFN以及所述终端设备发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
    所述网络设备向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
  13. 如权利要求12所述的方法，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+10×2 kul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
  14. 如权利要求12所述的方法，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
  15. 一种终端设备，其特征在于，包括：
    发送模块，用于向网络设备发送随机接入前导码；
    处理模块，用于根据发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据发送所述随机接入前导码的系统帧号SFN、发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
    接收模块，用于根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
  16. 如权利要求15所述的终端设备，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述 slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
  17. 如权利要求15所述的终端设备，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
  18. 如权利要求15-17任一项所述的终端设备，其特征在于，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
  19. 一种终端设备，其特征在于，包括：
    发送模块，用于向网络设备发送随机接入前导码；
    处理模块，用于根据发送所述随机接入前导码的子帧的标识、发送所述随机接入前导码的频域的标识、发送所述随机接入前导码的上行载波的标识、发送所述随机接入前导码的系统帧号SFN以及发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
    接收模块，用于根据所述RA-RNTI接收所述网络设备发送的随机接入响应RAR。
  20. 如权利要求19所述的终端设备，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+10×2 kul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
  21. 如权利要求19所述的终端设备，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
  22. 一种网络设备，其特征在于，包括：
    接收模块，用于接收终端设备发送的随机接入前导码；
    处理模块，用于根据所述终端设备发送所述随机接入前导码的第一个正交频分复用OFDM符号的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设 备发送所述随机接入前导码的上行载波的标识和第一标识中的至少一个确定随机接入-无线网络临时标识RA-RNTI，其中，所述第一标识根据所述终端设备发送所述随机接入前导码的系统帧号SFN、所述终端设备发送所述随机接入前导码的时隙的标识以及第一数值中的至少一个确定，所述第一数值为正整数；
    发送模块，用于向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
  23. 如权利要求22所述的网络设备，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×10×2 k×f_id+14×10×2 k×8×ul_carrier_id，t_id＝ceiling((SFN×10×2 k+slot_id)/x)mod(10×2 k)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数。
  24. 如权利要求22所述的网络设备，其特征在于，所述RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id，其中，t_id＝ceiling((SFN_id×80+slot_id)/x)mod(80)，其中，所述s_id为所述第一个OFDM符号的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述t_id为所述第一标识，所述slot_id为所述时隙的标识，所述x为所述第一数值，所述ceiling函数表示向上取整运算，所述mod表示求余运算。
  25. 如权利要求22-24任一项所述的网络设备，其特征在于，所述第一数值为发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值。
  26. 一种网络设备，其特征在于，包括：
    接收模块，用于接收终端设备发送的随机接入前导码；
    处理模块，用于根据所述终端设备发送所述随机接入前导码的子帧的标识、所述终端设备发送所述随机接入前导码的频域的标识、所述终端设备发送所述随机接入前导码的上行载波的标识、所述终端设备发送所述随机接入前导码的系统帧号SFN以及所述终端设备发送所述随机接入前导码的物理随机接入信道机会PRACH occasion的周期的值中的至少一个确定随机接入-无线网络临时标识RA-RNTI；
    发送模块，用于向所述终端设备发送随机接入响应RAR，所述RAR通过所述RA-RNTI标识。
  27. 如权利要求26所述的网络设备，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+10×2 kul_carrier_id+10×2 k×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求 余运算，所述k用于表示子载波间隔参数，所述k为大于等于0的整数，所述y为系统帧的时长。
  28. 如权利要求26所述的网络设备，其特征在于，所述RA-RNTI＝1+t_id+10×f_id+80ul_carrier_id+80×2×(SFN mod ceiling(periodicity/y))，其中，所述t_id为所述子帧的标识，所述f_id为所述频域的标识，所述ul_carrier_id为所述上行载波的标识，所述periodicity为所述周期的值，所述ceiling函数表示向上取整运算，所述mod表示求余运算，所述y为系统帧的时长。
  29. 一种终端设备，其特征在于，包括：存储器、通信总线以及处理器，其中，所述存储器用于存储程序代码，所述处理器用于调用所述程序代码，用于执行权利要求1-7任一项所述的方法。
  30. 一种网络设备，其特征在于，包括：存储器、通信总线以及处理器，其中，所述存储器用于存储程序代码，所述处理器用于调用所述程序代码，用于执行权利要求8-14任一项所述的方法。
  31. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行权利要求1-14任一项所述的方法。
  32. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得计算机执行权利要求1-14任一项所述的方法。
  33. 一种通信系统，其特征在于，包括网络设备和终端设备，所述网络设备为如权利要求22至28任意一项或30所述的网络设备，所述终端设备为如权利要求15至21任意一项或29所述的终端设备。
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CN112312582B (zh) * 2020-11-04 2022-10-25 中国科学院上海微系统与信息技术研究所 卫星通信的随机接入方法、系统、介质及装置
CN114698139A (zh) * 2020-12-31 2022-07-01 展讯通信（上海）有限公司 数据传输方法、装置和设备
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