WO2019141013A1 - Procédé d'accès aléatoire, appareil, dispositif, puce, support de stockage, et produit programme d'ordinateur - Google Patents

Procédé d'accès aléatoire, appareil, dispositif, puce, support de stockage, et produit programme d'ordinateur Download PDF

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Publication number
WO2019141013A1
WO2019141013A1 PCT/CN2018/119624 CN2018119624W WO2019141013A1 WO 2019141013 A1 WO2019141013 A1 WO 2019141013A1 CN 2018119624 W CN2018119624 W CN 2018119624W WO 2019141013 A1 WO2019141013 A1 WO 2019141013A1
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Prior art keywords
random access
sequences
access sequence
sequence
time
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PCT/CN2018/119624
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English (en)
Chinese (zh)
Inventor
廖树日
丁梦颖
胡远洲
汪凡
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance

Definitions

  • the embodiments of the present application relate to communication technologies, and in particular, to a random access method, device, device, chip, storage medium, and program product.
  • the fifth generation (5G) communication system that can support multiple services has emerged.
  • the random access scenario of the 5G communication system requires that the number of users in the serving cell can reach the number of users in the serving cell under the LTE communication system.
  • the random access channel (RACH) is required to support more functions (for example, the uplink and downlink beams can be indicated), and the spectrum efficiency of the RACH is required to be four times higher than that of the 6 GHz scenario.
  • RACH spectral efficiency can be increased by 64 times in scenarios above 6 GHz.
  • the network device can generate a preamble set required for uplink random access for each cell by cyclically shifting different Zadoff-Chu (ZC) root sequences.
  • the preamble set of each cell may include 64 ZC sequences (sequences generated by cyclic shift of the ZC root sequence), and each ZC sequence corresponds to a preamble identity (ID).
  • ID preamble identity
  • the terminal device accesses a certain cell, the terminal device can randomly select a ZC sequence corresponding to a preamble ID as a random access sequence in the preamble set used by the terminal, and send the packet to the cell.
  • Network device to request access to the cell.
  • the random access scenario of the 5G communication system requires that the number of users in the serving cell can reach 10-100 times the number of users in the serving cell under the LTE communication system. Therefore, when a terminal device in a 5G communication system accesses a cell by using a random access method, if a random access sequence is generated in the LTE communication system, multiple terminal devices are likely to use the same random connection at the same time. When the incoming sequence requests to access the cell (that is, the random access collides), the multiple terminal devices fail to access the cell.
  • the embodiment of the present application provides a random access method, device, device, chip, storage medium, and program product, which can reduce the probability that multiple terminal devices use the same preamble sequence to request access to a cell at the same time (ie, reduce the random access collision probability). ), increase the RACH capacity of the cell.
  • an embodiment of the present application provides a random access method, where the method includes:
  • the terminal device acquires the first random access identifier
  • the terminal device selects a first random access sequence set corresponding to the first random access identifier in the random access sequence set group, where the random access sequence set group includes L random access sequence sets, each of the The random access sequence set includes J random access sequences, and the L and the J are both positive integers, and the J is greater than or equal to 2;
  • the terminal device sends X first random access sequences to the network device, where X is a positive integer.
  • the terminal device can obtain X numbers according to the first preamble sequence corresponding to the first preamble ID by using one preamble ID corresponding to the J preamble sequences in the preamble sequence set.
  • a preamble sequence is flexible and diverse. Therefore, when the terminal device generates the preamble sequence requesting access to the cell to be accessed in the foregoing manner, the probability that multiple terminal devices request the access to the cell by using the same preamble sequence at the same time (ie, reducing the probability of random access collision) may be reduced.
  • the RACH capacity of the cell can be increased.
  • each of the first random access sequences is a random access sequence obtained according to the first random access sequence set.
  • the X is equal to 1
  • the first random access sequence is: a random access sequence generated by adding J random access sequences in the first random access sequence set.
  • the terminal device may be configured to adopt J preambles of the first preamble sequence set corresponding to the first preamble ID.
  • the preamble sequence is generated by the sequence addition, the probability that a plurality of terminal devices use the same preamble sequence set to request access to the preamble sequence of the cell to be accessed may be reduced, that is, the multiple preamble sequences may be simultaneously used by multiple terminal devices. The probability of requesting access to the cell (ie, reducing the probability of random access collision), thereby increasing the RACH capacity of the cell.
  • the terminal device sends X first random access sequences to the network device, including:
  • the terminal device Transmitting, by the terminal device, the first random access sequence on the first time-frequency resource to the network device, where the first time-frequency resource includes: one that is allowed to send the first random access sequence A time domain resource and a frequency domain resource that allows the first random access sequence to be transmitted.
  • the first preamble sequence length can be sent by the terminal device of the LTE communication system by using the random access method provided by the possible design to generate the first preamble sequence by adding the J preamble sequences of the first preamble sequence set.
  • the length of the preamble sequence remains the same, so that the time-frequency resource size used by the terminal device to transmit the first preamble sequence remains the same as the time-frequency resource size used by the terminal device in the LTE communication system to transmit the preamble sequence.
  • the terminal device can send the first preamble sequence along the subcarrier interval used by the terminal device in the LTE communication system to transmit the preamble sequence, so that the first preamble sequence sent by the terminal device has better anti-delay extension performance and supports the cell radius. Big.
  • the J random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the X is equal to the J
  • each of the first random access sequences is: one random access sequence in the first random access sequence set.
  • the terminal device can associate each preamble sequence of the first preamble sequence set corresponding to the first preamble ID by using one preamble ID corresponding to the J preamble sequences in the preamble sequence set.
  • the probability that the preamble sequences generated by multiple terminal devices are the same may be reduced, that is, the probability that multiple terminal devices use the same preamble sequence to request access to the cell at the same time (ie, reduce the random access collision probability) may be reduced.
  • the RACH capacity of the cell can be increased.
  • the terminal device sends X first random access sequences to the network device, including:
  • the terminal device Transmitting, by the terminal device, the X first random access sequences on the second time-frequency resource to the network device, where the second time-frequency resource includes: The time domain resources of the sequence and X frequency domain resources that allow the first random access sequence to be transmitted.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes Y random access sequences, where the M and the Said Y is a positive integer;
  • Each of the first random access sequences is a random access sequence obtained according to a subset of random access sequences.
  • the X is equal to the M
  • each of the first random access sequences is: a random access sequence generated by adding Y random access sequences in a subset of random access sequences .
  • the probability that the preamble sequences generated by multiple terminal devices are the same may be reduced, that is, multiple terminal devices may be simultaneously reduced.
  • the probability of requesting access to the cell using the same preamble sequence ie, reducing the probability of random access collision
  • the terminal device sends X first random access sequences to the network device, including:
  • the third time-frequency resource includes: M allowed to send the first random access a time domain resource of the sequence and a frequency domain resource that allows the first random access sequence to be sent; or the third time-frequency resource includes: 1 time domain resource that allows the first random access sequence to be sent And M frequency domain resources that allow the first random access sequence to be transmitted.
  • the Y random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the X is equal to the product of the M and the Y, and each of the first random access sequences is: a random access sequence in a subset of random access sequences.
  • the probability that the preamble sequences generated by multiple terminal devices are the same may be reduced, that is, multiple terminal devices may be simultaneously reduced.
  • the probability of requesting access to the cell using the same preamble sequence ie, reducing the probability of random access collision
  • the method can increase the RACH sub-carrier spacing and has better anti-frequency offset performance.
  • the terminal device sends X first random access sequences to the network device, including:
  • the fourth time-frequency resource includes: M permission to send the first random access The time domain resources of the sequence and the Y frequency domain resources that allow the first random access sequence to be transmitted.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes K random access sequence groups, each of the The random access sequence group includes Q random access sequences, where the M, the K and the Q are positive integers;
  • Each of the first random access sequences is a random access sequence obtained according to a random access sequence group.
  • the probability that the preamble sequences generated by the plurality of terminal devices are the same may be reduced, that is, multiple terminals may be reduced.
  • the device simultaneously uses the same preamble sequence to request the probability of accessing the cell (ie, reduces the random access collision probability), thereby improving the RACH capacity of the cell.
  • the method can increase the RACH sub-carrier spacing and has better anti-frequency offset performance.
  • the X is a product of the M and the K, and each of the first random access sequences is: adding Q random access sequences in a random access sequence group. Generated random access sequence.
  • the terminal device sends X first random access sequences to the network device, including:
  • the terminal device Transmitting, by the terminal device, the X first random access sequences on the fifth time-frequency resource to the network device, where the fifth time-frequency resource includes: M permission to send the first random access The time domain resources of the sequence and the K frequency domain resources that are allowed to transmit the first random access sequence.
  • the Q random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the embodiment of the present application provides a random access method, where the method includes:
  • the network device broadcasts random access sequence set group configuration information, the random access sequence set group includes L random access sequence sets, and each of the random access sequence sets includes J random access sequences, where the L and The J is a positive integer, and the J is greater than or equal to 2;
  • the network device detects X first random access sequences sent by the terminal device, where X is a positive integer
  • the network device determines a random access identifier corresponding to the X first random access sequences.
  • each of the first random access sequences is a random access sequence obtained according to the first random access sequence set.
  • the X is equal to 1
  • the first random access sequence is: a random access sequence generated by adding J random access sequences in the first random access sequence set.
  • the network device detects X first random access sequences sent by the terminal device, including:
  • the network device detects the X first random access sequences on the first time-frequency resource, where the first time-frequency resource includes: 1 time domain resource that allows the first random access sequence to be sent, and 1 The frequency domain resources that are allowed to transmit the first random access sequence.
  • the network device detects the X first random access sequences on the first time-frequency resource, including:
  • the network device selects at least one second random access sequence set from the random access sequence set according to the X first random access sequences received on the first time-frequency resource;
  • the network device determines, according to the at least one second random access sequence set, the random access sequence set corresponding to the X first random sequences, including:
  • the network device combines the J random access sequences in each of the second random access sequence sets, and uses the second random access sequence set with the largest received power and greater than a preset threshold as the X
  • the first random sequence corresponds to a set of random access sequences.
  • the J random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the X is equal to the J
  • each of the first random access sequences is: one random access sequence in the first random access sequence set.
  • the network device detects X first random access sequences sent by the terminal device, including:
  • the network device detects the X first random access sequences on the second time-frequency resource, where the second time-frequency resource includes: 1 time domain resource and X that are allowed to send the first random access sequence The frequency domain resources that are allowed to transmit the first random access sequence.
  • the detecting, by the network device, the first random access sequence on the second time-frequency resource includes:
  • the network device selects at least one third random access sequence from the random access sequence set according to the X first random access sequences received on the X frequency domain resources. set;
  • the network device determines, according to the at least one third random access sequence set, the random access sequence set corresponding to the X first random sequences, including:
  • the network device combines the J random access sequences in each of the third random access sequence sets, and uses a third random access sequence set with the largest received power and greater than a preset threshold as the first A random access sequence corresponding to a random sequence.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes Y random access sequences, where the M and the Said Y is a positive integer;
  • Each of the first random access sequences is a random access sequence obtained according to a subset of random access sequences.
  • the X is equal to the M
  • each of the first random access sequences is: a random access sequence generated by adding Y random access sequences in a subset of random access sequences .
  • the network device detects X first random access sequences sent by the terminal device, including:
  • the network device detects the X first random access sequences on a third time-frequency resource, where the third time-frequency resource includes: M time-domain resources that allow the first random access sequence to be sent, and a frequency domain resource that allows the first random access sequence to be sent; or the third time-frequency resource includes: one time domain resource that allows the first random access sequence to be sent, and M are allowed to send the The frequency domain resource of the first random access sequence.
  • the third time-frequency resource includes M time domain resources that allow the first random access sequence to be sent, and one frequency domain resource that allows the first random access sequence to be sent.
  • the network device selects at least X first random access sequences from the random access sequence set according to the X first random access sequences received on the X time domain resources. set;
  • the determining, by the network device, the at least one second random access sequence subset according to the at least one of the first random access sequence subsets on each of the time domain resources including:
  • the network device combines Y random access sequences in each of the first random access sequence subsets on each of the time domain resources, and the first received power is greater than a preset threshold
  • the subset of random access sequences is used as a subset of the second random access sequence.
  • the network device determines the random access corresponding to the X first random sequences according to the at least X second random access sequence subsets determined on the X time domain resources.
  • Sequence collection including:
  • the network device combines the at least X second random access sequence subsets according to the X time domain resources, and uses a random access sequence set with a maximum received power and a preset threshold value as the A set of random access sequences corresponding to the X first random sequences.
  • the Y random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the determining, by the network device, the random access identifier corresponding to the X first random access sequences including:
  • the network device uses, as the random access identifier corresponding to the X first random access sequences, the random access identifier of the random access sequence set corresponding to the X first random access sequences.
  • the X is equal to the product of the M and the Y, and each of the first random access sequences is: a random access sequence in a subset of random access sequences.
  • the network device detects X first random access sequences sent by the terminal device, including:
  • the network device detects the X first random access sequences on a fourth time-frequency resource, where the fourth time-frequency resource includes: M time-domain resources and Ys that are allowed to send the first random access sequence The frequency domain resources that are allowed to transmit the first random access sequence.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes K random access sequence groups, each of the The random access sequence group includes Q random access sequences, where the M, the K and the Q are positive integers;
  • Each of the first random access sequences is a random access sequence obtained according to a random access sequence group.
  • the X is a product of the M and the K, and each of the first random access sequences is: adding Q random access sequences in a random access sequence group. Generated random access sequence.
  • the network device detects X first random access sequences sent by the terminal device, including:
  • the network device detects the X first random access sequences on the fifth time-frequency resource, where the fifth time-frequency resource includes: M time-domain resources and K that are allowed to send the first random access sequence The frequency domain resources that are allowed to transmit the first random access sequence.
  • the Q random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the embodiment of the present application provides a terminal device, where the terminal device includes:
  • a processing module configured to acquire a first random access identifier, and select a first random access sequence set corresponding to the first random access identifier in the random access sequence set group, where the random access sequence set group includes L a random access sequence set, each of the random access sequence sets includes J random access sequences, the L and the J are both positive integers, and the J is greater than or equal to 2;
  • a sending module configured to send X first random access sequences to the network device, where X is a positive integer.
  • each of the first random access sequences is a random access sequence obtained according to the first random access sequence set.
  • the X is equal to 1
  • the first random access sequence is: a random access sequence generated by adding J random access sequences in the first random access sequence set.
  • the sending module is specifically configured to map the first random access sequence to the network device by using the first time-frequency resource, where the first time-frequency resource includes: A time domain resource allowing the first random access sequence to be transmitted and a frequency domain resource allowing the first random access sequence to be transmitted.
  • the J random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the X is equal to the J
  • each of the first random access sequences is: one random access sequence in the first random access sequence set.
  • the sending module is configured to map the X first random access sequences to the network device on a second time-frequency resource, where the second time-frequency resource includes : 1 time domain resource allowing transmission of the first random access sequence and X frequency domain resources allowing transmission of the first random access sequence.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes Y random access sequences, where the M and the Said Y is a positive integer;
  • Each of the first random access sequences is a random access sequence obtained according to a subset of random access sequences.
  • the X is equal to the M
  • each of the first random access sequences is: a random access sequence generated by adding Y random access sequences in a subset of random access sequences .
  • the sending module is configured to map the X first random access sequences to the network device on a third time-frequency resource, where the third time-frequency resource includes : M time domain resources that allow the first random access sequence to be transmitted and one frequency domain resource that allows the first random access sequence to be sent; or the third time frequency resource includes: one allowed to send The time domain resource of the first random access sequence and the M frequency domain resources that are allowed to send the first random access sequence.
  • the Y random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the X is equal to the product of the M and the Y, and each of the first random access sequences is: a random access sequence in a subset of random access sequences.
  • the sending module is specifically configured to map the X first random access sequences to the network device on a fourth time-frequency resource, where the fourth time-frequency resource includes : M time domain resources allowing transmission of the first random access sequence and Y frequency domain resources allowing transmission of the first random access sequence.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes K random access sequence groups, each of the The random access sequence group includes Q random access sequences, where the M, the K and the Q are positive integers;
  • Each of the first random access sequences is a random access sequence obtained according to a random access sequence group.
  • the X is a product of the M and the K, and each of the first random access sequences is: adding Q random access sequences in a random access sequence group. Generated random access sequence.
  • the sending module is specifically configured to map the X first random access sequences to the network device on a fifth time-frequency resource, where the fifth time-frequency resource includes : M time domain resources allowing transmission of the first random access sequence and K frequency domain resources allowing transmission of the first random access sequence.
  • the Q random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the beneficial effects of the terminal devices provided by the foregoing third and third possible aspects, the beneficial effects of the first aspect and the possible designs of the first aspect may be referred to, and no further details are provided herein.
  • the embodiment of the present application provides a network device, where the network device includes:
  • a sending module configured to broadcast random access sequence set group configuration information, where the random access sequence set group includes L random access sequence sets, each of the random access sequence sets includes J random access sequences, L and the J are both positive integers, and the J is greater than or equal to 2;
  • a receiving module configured to receive X first random access sequences sent by the terminal device
  • the processing module is configured to detect the X first random access sequences, and determine a random access identifier corresponding to the X first random access sequences, where the X is a positive integer.
  • each of the first random access sequences is a random access sequence obtained according to the first random access sequence set.
  • the X is equal to 1
  • the first random access sequence is: a random access sequence generated by adding J random access sequences in the first random access sequence set.
  • the processing module is configured to detect the X first random access sequences on the first time-frequency resource, where the first time-frequency resource includes: a time domain resource of the first random access sequence and a frequency domain resource allowing the first random access sequence to be transmitted.
  • the processing module is specifically configured to: according to the X first random access sequences received by the receiving module on the first time-frequency resource, from the random access And selecting at least one second random access sequence set in the sequence set group, and determining, according to the at least one second random access sequence set, the random access sequence set corresponding to the X first random sequences.
  • the processing module is specifically configured to combine the J random access sequences in each of the second random access sequence sets to maximize the received power and exceed a preset threshold.
  • the second set of random access sequences is used as a set of random access sequences corresponding to the X first random sequences.
  • the J random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the X is equal to the J
  • each of the first random access sequences is: one random access sequence in the first random access sequence set.
  • the processing module is specifically configured to detect the X first random access sequences on a second time-frequency resource, where the second time-frequency resource includes: a time domain resource of the first random access sequence and X frequency domain resources allowing the first random access sequence to be transmitted.
  • the processing module is specifically configured to: according to the X first random access sequences received by the receiving module on the X frequency domain resources, from the random At least one third random access sequence set is selected in the access sequence set, and the random access sequence set corresponding to the X first random sequences is determined according to the at least one third random access sequence set.
  • the processing module is configured to combine the J random access sequences in each of the third random access sequence sets to maximize the received power and exceed a preset threshold.
  • the third random access sequence set is used as the random access sequence set corresponding to the first random sequence.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes Y random access sequences, where the M and the Said Y is a positive integer;
  • Each of the first random access sequences is a random access sequence obtained according to a subset of random access sequences.
  • the X is equal to the M
  • each of the first random access sequences is: a random access sequence generated by adding Y random access sequences in a subset of random access sequences .
  • the processing module is configured to detect the X first random access sequences on a third time-frequency resource, where the third time-frequency resource includes: M a time domain resource of the first random access sequence and one frequency domain resource that is allowed to send the first random access sequence; or the third time frequency resource includes: one of the first random access allowed to be sent The time domain resources of the sequence and the M frequency domain resources that are allowed to transmit the first random access sequence.
  • the third time-frequency resource includes M time domain resources that allow the first random access sequence to be sent, and one frequency domain resource that allows the first random access sequence to be sent.
  • the processing module is specifically configured to: filter, according to the X first random access sequences received by the receiving module on the X time domain resources, from the random access sequence set At least X first random access sequence subsets; determining, on each of the time domain resources, at least one second random access sequence subset according to at least one of the first random access sequence subsets; And determining, by the at least X second random access sequence subsets on the X time domain resources, the set of random access sequences corresponding to the X first random sequences.
  • the processing module is specifically configured to combine Y random access sequences in each of the first random access sequence subsets on each of the time domain resources, and receive The first random access sequence subset having the largest power and greater than the preset threshold is used as the second random access sequence subset.
  • the processing module is configured to combine the at least X second random access sequence subsets according to the X time domain resources to maximize receiving power and greater than a preset.
  • a set of random access sequences of threshold values is used as a set of random access sequences corresponding to the X first random sequences.
  • the Y random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • the processing module is specifically configured to use, as the X first random access, a random access identifier of a random access sequence set corresponding to the X first random access sequences.
  • the random access identifier corresponding to the sequence.
  • the X is equal to the product of the M and the Y, and each of the first random access sequences is: a random access sequence in a subset of random access sequences.
  • the processing module is configured to detect the X first random access sequences on a fourth time-frequency resource, where the fourth time-frequency resource includes: M a time domain resource of the first random access sequence and Y frequency domain resources allowing the first random access sequence to be transmitted.
  • the first random access sequence set includes M random access sequence subsets, and each of the random access sequence subsets includes K random access sequence groups, each of the The random access sequence group includes Q random access sequences, where the M, the K and the Q are positive integers;
  • Each of the first random access sequences is a random access sequence obtained according to a random access sequence group.
  • the X is a product of the M and the K, and each of the first random access sequences is: adding Q random access sequences in a random access sequence group. Generated random access sequence.
  • the processing module is configured to detect the X first random access sequences on a fifth time-frequency resource, where the fifth time-frequency resource includes: M A time domain resource of the first random access sequence and K frequency domain resources allowing the first random access sequence to be transmitted.
  • the Q random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences.
  • an embodiment of the present application provides a terminal device, where the terminal device includes: a processor, a memory, and a transmitter; the transmitter is coupled to the processor, and the processor controls a sending action of the transmitter. ;
  • the memory is for storing computer executable program code, the program code comprising instructions; when the processor executes the instruction, the instruction causes the terminal device to perform the first aspect or the first aspect Random access methods provided by each possible design.
  • an embodiment of the present application provides a network device, where the network device includes: a processor, a memory, a receiver, and a transmitter; the receiver is coupled to the processor, and the processor controls the transmitter Transmitting action, the processor controlling a receiving action of the receiver;
  • the memory is for storing computer executable program code, the program code comprising instructions; when the processor executes the instructions, the instructions cause the network device to perform the second aspect or the second aspect Random access methods provided by each possible design.
  • an embodiment of the present application provides a communication apparatus, including a unit, a module, or a circuit for performing the method provided by the above first aspect or the possible design of the first aspect.
  • the communication device may be a terminal device or a module applied to the terminal device, for example, may be a chip applied to the terminal device.
  • an embodiment of the present application provides a communication apparatus, including a unit, a module, or a circuit for performing the method provided by the foregoing second aspect or the possible design of the second aspect.
  • the communication device may be a network device or a module applied to the network device, for example, may be a chip applied to the network device.
  • an embodiment of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or the various possible designs of the first aspect.
  • embodiments of the present application provide a computer program product comprising instructions that, when run on a computer, cause the computer to perform the methods of the second aspect or the various possible designs of the second aspect.
  • an embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, when executed on a computer, causing the computer to perform the first aspect or the first aspect.
  • the computer readable storage medium stores instructions, when executed on a computer, causing the computer to perform the first aspect or the first aspect.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, when executed on a computer, causing the computer to perform the second aspect or the second aspect Various possible methods of design.
  • the random access method, device, device, chip, storage medium, and program product provided by the embodiments of the present application can make the terminal device according to the first preamble by assigning a preamble ID to J preamble sequences in a preamble sequence set.
  • the first preamble sequence set corresponding to the ID obtains X first preamble sequences that are flexible and diverse. Therefore, when the terminal device generates the preamble sequence requesting access to the cell to be accessed in the foregoing manner, the probability that multiple terminal devices request the access to the cell by using the same preamble sequence at the same time (ie, reducing the probability of random access collision) may be reduced.
  • the RACH capacity of the cell can be increased.
  • FIG. 1 is a schematic structural diagram of a mobile communication system to which an embodiment of the present application is applied;
  • FIG. 2 is a schematic flowchart of a random access method according to an embodiment of the present application.
  • FIG. 3A is a schematic structural diagram of a transmitter of a terminal device according to an embodiment of the present disclosure
  • FIG. 3B is a schematic flowchart of another random access method according to an embodiment of the present application.
  • 3C is a schematic structural diagram of a transmitter of another terminal device according to an embodiment of the present disclosure.
  • FIG. 3D is a schematic flowchart diagram of still another random access method according to an embodiment of the present application.
  • FIG. 4A is a schematic flowchart of still another random access method according to an embodiment of the present application.
  • 4B is a schematic structural diagram of a transmitter of another terminal device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another terminal device provided by the present application.
  • FIG. 8 is a schematic structural diagram of another network device according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic structural diagram of a mobile communication system according to an embodiment of the present application.
  • the mobile communication system may include a core network device 110, a radio access network device 120, and at least one terminal device (such as the terminal device 130 and the terminal device 140 in FIG. 1).
  • the terminal device is connected to the radio access network device 120 in a wireless manner, and the radio access network device 120 is connected to the core network device 110 by wireless or wired.
  • the core network device 110 and the radio access network device 120 may be independent physical devices, or may integrate the functions of the core network device 110 and the logical functions of the wireless access network device 120 on the same physical device.
  • the terminal device can be fixed or mobile.
  • FIG. 1 is only a schematic diagram.
  • the mobile communication system may further include other network devices, for example, a wireless relay device and a wireless backhaul device, and the like, which is not shown in FIG.
  • the number of the core network device 110, the radio access network device 120, and the terminal device included in the mobile communication system is not limited in this embodiment of the present application.
  • the radio access network device 120 is an access device that the terminal device accesses to the mobile communication system by using a wireless device, and may be a base station NodeB, an evolved base station eNodeB, a 5G mobile communication system, or a new radio (NR) communication.
  • the specific technology and the specific device configuration adopted by the radio access network device 120 are not limited in the embodiment of the present application.
  • the base station in the system, the base station in the future mobile communication system, and the access node in the WiFi system are not limited.
  • the radio access network device 120 is referred to as a network device. Unless otherwise specified, in the embodiment of the present application, the network device refers to the radio access network device 120.
  • the terms 5G and NR may be equivalent.
  • the terminal device may also be referred to as a terminal terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), and the like.
  • the terminal device can be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, industrial control (industrial control) Wireless terminal, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless in transport safety A terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • the radio access network device 120 and the terminal device can be deployed on land, including indoors or outdoors, handheld or on-board; or can be deployed on the surface of the water; and can also be deployed on aircraft, balloons, and satellites in the air.
  • the application scenarios of the radio access network device 120 and the terminal device are not limited in this embodiment.
  • the radio access network device 120 and the terminal device can communicate through a licensed spectrum, or through an unlicensed spectrum, or simultaneously through an authorized spectrum and an unlicensed spectrum.
  • the radio access network device 120 and the terminal device can communicate through a spectrum of 6 gigahertz (GHz) or less, or can communicate through a spectrum of 6 GHz or higher, and can simultaneously use a spectrum below 6 GHz and a spectrum above 6 GHz. Communicate.
  • GHz gigahertz
  • the spectrum resources used between the radio access network device 120 and the terminal device are not limited in this embodiment of the present application.
  • the random access procedure is a process in which the terminal device accesses the cell, and the purpose is to establish an uplink synchronization relationship with the network device to which the cell belongs, and the network device to which the cell belongs is allocated a user ID and a transmission resource for the terminal device to perform data transmission.
  • the random access scenario of the 5G communication system requires that the number of users in the serving cell can reach the number of users in the serving cell under the LTE communication system. 100 times, the random access channel (RACH) is required to support more functions (for example, the uplink and downlink beams can be indicated), and the spectrum efficiency of the RACH is required to be four times higher than that of the 6 GHz scenario.
  • RACH spectral efficiency can be increased by 64 times in scenarios above 6 GHz.
  • the network device can generate a preamble set required for uplink random access for each cell by cyclically shifting different ZC root sequences.
  • the preamble set of each cell may include 64 ZC sequences (sequences generated by cyclic shifting of the ZC root sequence), and each ZC sequence corresponds to one preamble ID in the preamble ID set.
  • the terminal device may generate a preamble set configured by the network device and a corresponding premable ID set according to the preamble set configuration information broadcast by the network device to which the cell belongs.
  • the configuration information may include a ZC root sequence used when generating the preamble set, and a cyclic shift value.
  • the terminal device may randomly select a preamble ID from the preamble ID set, and use the ZC sequence corresponding to the preamble ID in the preamble set as the random access sequence. And sending to the network device to which the cell belongs to request access to the cell. If the terminal device accesses the cell by means of non-contention random access, the terminal device may, after generating the preamble set configured by the network device, the preamble ID corresponding to the preamble ID according to the preamble ID indicated by the network device. The ZC sequence is sent to the network device to which the cell belongs as a random access sequence to request access to the cell.
  • the network device indicates the preamble ID can refer to the prior art, and details are not described herein again.
  • the foregoing random access sequence may be simply referred to as a preamble sequence. It will be appreciated that the random access sequence may still follow the terminology of the preamble sequence in the aforementioned communication system in a 5G mobile communication system.
  • the naming of the random access sequence in each communication system is not limited in this embodiment of the present application. The embodiment of the present application is described by taking a random access sequence as a preamble sequence as an example.
  • the random access scenario of the 5G communication system requires that the number of users in the serving cell can reach 10-100 times the number of users in the serving cell under the LTE communication system. Therefore, when the terminal device in the 5G communication system accesses the cell in a manner of contending random access, if the preamble sequence is still used in the LTE communication system, multiple terminal devices are likely to use the same preamble sequence request at the same time. In the case of the incoming cell (ie, the random access collides), the multiple terminal devices fail to access the cell.
  • the embodiment of the present application provides a random access method, which can reduce the probability that multiple terminal devices request to access a cell simultaneously using the same preamble sequence by using a preamble ID corresponding to multiple preamble sequences. That is, the probability of random access collision is reduced, and the RACH capacity of the cell is improved.
  • the random access method provided by the embodiment of the present application includes, but is not limited to, a random access scenario in a 5G communication system, including a random access scenario in which a cell is accessed by means of contention random access, and a non-contention randomization is adopted. Access mode accesses the random access scenario of the cell).
  • the method in this embodiment may be applied to a network device, and may also be applied to a chip in a network device. Accordingly, the method in this embodiment may be applied to a terminal device, and may also be applied to a terminal device. chip.
  • the technical solutions of the present application are described in detail by using some embodiments in the following. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.
  • FIG. 2 is a schematic flowchart diagram of a random access method according to an embodiment of the present disclosure.
  • the embodiment relates to a specific process of generating, by the terminal device, the X preamble sequences to the network device based on the J preamble sequences in the first preamble sequence set corresponding to the first random access identifier.
  • the method may include:
  • the network device broadcasts the preamble sequence set group configuration information.
  • the network device may generate a preamble sequence set group for each cell.
  • the preamble sequence set group may include L preamble sequence sets.
  • Each preamble sequence set may include J preamble sequences. There is at least one difference between the J preamble sequences included between each preamble sequence set.
  • L and J are positive integers, and J is greater than or equal to 2.
  • Each preamble sequence set in the preamble sequence set group corresponds to one random access identifier in the random access identifier set. That is to say, one random access identifier corresponds to J preamble sequences. It can be understood that the random access identifier mentioned above may still use the term of the preamble ID in the foregoing communication system in the 5G mobile communication system.
  • the naming of the random access identifier in each communication system is not limited in this embodiment of the present application.
  • the embodiment of the present application is described by taking a random access identifier as a preamble ID as an example.
  • each preamble sequence set in the preamble sequence set and the preamble ID in the preamble ID set can be, for example, as shown in Table 1:
  • Preamble ID collection Preamble sequence collection group Preamble sequence Preamble ID 1 Preamble sequence collection 1 J 1 preamble sequence Preamble ID 2 Preamble sequence collection 2 J 2 preamble sequences Preamble ID 3 Preamble sequence collection 3 J 3 preamble sequences Preamble ID 4 Preamble sequence collection 4 J 4 preamble sequences whil ising till Preamble ID L Preamble sequence set L J 1 preamble sequence
  • the network device may broadcast the configuration information of the preamble sequence set group configured by the network device for each cell in a manner that the network device broadcasts the configuration information in the LTE communication system.
  • the preamble sequence set group configuration information may include an identifier of the cell, a ZC root sequence used when generating the preamble sequence set group of the cell, a cyclic shift value, a value of L, a value of J, and the like.
  • the terminal device may generate the network device as the standby device according to the preamble sequence set group configuration information of the to-be-accessed cell broadcasted by the network device.
  • the terminal device acquires a first preamble ID.
  • the terminal device may randomly select a preamble ID from the preamble ID set of the cell to be accessed as the first preamble ID. If the terminal device accesses the cell to be accessed by using the non-contention random access mode, the terminal device may use the preamble ID indicated by the network device as the first preamble ID. For example, how the network device indicates the preamble ID to the terminal device can refer to the prior art.
  • the terminal device selects, in the preamble sequence set, a first preamble sequence set corresponding to the first preamble ID.
  • the terminal device may search for the first preamble sequence set corresponding to the first preamble ID in the preamble sequence set group of the to-be-accessed cell according to the first preamble ID, that is, the J corresponding to the first preamble ID. Preamble sequence.
  • the terminal device sends X first preamble sequences to the network device.
  • the terminal device may request the network device to access the cell to be accessed by transmitting the X first preamble sequences to the network device.
  • X is a positive integer.
  • the terminal device can obtain the X first preamble sequences according to the first preamble sequence set corresponding to the first preamble ID by using one preamble ID corresponding to the J preamble sequences in the preamble sequence set.
  • the terminal device may add a plurality of preamble sequences in the first preamble sequence set to generate a first preamble sequence, or the terminal device may use a certain preamble sequence in the first preamble sequence set as a first preamble sequence, etc. .
  • the J preamble sequences included in each preamble sequence set are at least one different, and the manner in which the terminal device generates the X first preamble sequences is flexible. Therefore, when the terminal device generates the preamble sequence requesting access to the cell to be accessed in the foregoing manner, the probability that multiple terminal devices request the access to the cell by using the same preamble sequence at the same time (ie, reducing the probability of random access collision) may be reduced.
  • the RACH capacity of the cell can be increased.
  • the network device detects X first preamble sequences sent by the terminal device.
  • the network device may detect the X first preamble sequences sent by the terminal device by using the preamble sequence set group of the cell to be accessed, to identify the preamble sequence set corresponding to the X first preamble sequences.
  • the network device may determine, by using the X first preamble sequences sent by the terminal device, a timing advance (TA) of the terminal device.
  • TA timing advance
  • the network device can control the time alignment of the uplink signals sent by the terminal devices using the same time domain resource to reach the network device side, so that uplink synchronization can be ensured.
  • the network device determines a preamble ID corresponding to the X first preamble sequences.
  • the network device may use the preamble ID corresponding to the preamble sequence set as the preamble ID corresponding to the X first preamble sequences. After the network device determines the preamble ID corresponding to the X first preamble sequences and the TA of the terminal device, the preamble ID and the corresponding TA may be carried in a random access response (RAR) and sent to the terminal device.
  • RAR random access response
  • the terminal device determines, according to the preamble ID carried in the RAR, that the preamble ID is the first preamble ID used by the terminal device to generate the X first preamble sequences, and may be completed based on the TA corresponding to the preamble ID in the RAR.
  • the preamble ID is the first preamble ID used by the terminal device to generate the X first preamble sequences.
  • the following describes the process of obtaining the first preamble sequences according to the first preamble sequence set by the terminal device, and the process of detecting the X first preamble sequences by the network device, in combination with the specific structure of the preamble sequence set in the preamble sequence set group. And the description may specifically include the following structures:
  • each preamble sequence set in the preamble sequence set includes J preamble sequences, and the J preamble sequences included in each preamble sequence set are at least one different.
  • Each preamble sequence of the J preamble sequences included in each preamble sequence set is a ZC sequence. That is, each preamble sequence set includes J ZC sequences.
  • the J ZC sequences may be the same ZC sequence, or may have at least one different ZC sequence, or may be all different ZC sequences.
  • these different ZC sequences may be sequences generated by the same ZC root sequence. That is, different ZC sequences randomly selected from a set of cyclic shift sequences generated from a single ZC root sequence. In this implementation, any two of these different ZC sequences are orthogonal sequences.
  • these different ZC sequences may be sequences generated from multiple ZC root sequences. That is, different ZC sequences randomly selected from a set of cyclic shift sequences generated from a plurality of ZC root sequences. In this implementation, any two of the different ZC sequences are quasi-orthogonal sequences.
  • the manner in which the foregoing terminal device generates the first random access sequence includes the following two implementation manners:
  • FIG. 3A is a schematic structural diagram of a transmitter of a terminal device according to an embodiment of the present application.
  • the terminal device may pass the A first preamble sequence is generated by adding J preamble sequences in a first preamble sequence set corresponding to a preamble ID. That is, X in the above X first random access sequences is equal to 1.
  • the terminal device can generate the first preamble sequence by the following formula (1).
  • the terminal device may perform a subcarrier mapping, an inverse discrete Fourier transform, an insertion cyclic prefix, and the like on the first preamble sequence.
  • the first preamble sequence is a time domain sequence, a discrete Fourier transform needs to be performed before performing subcarrier mapping on the first preamble sequence.
  • the first preamble sequence is a frequency domain sequence, it is no longer necessary to perform a discrete Fourier transform before performing subcarrier mapping on the first preamble sequence.
  • the terminal device needs to perform the discrete pre-emble sequence on the first preamble sequence, according to the preamble sequence format. , repeating the first preamble sequence.
  • the terminal device performs the discrete Fourier transform, the subcarrier mapping, the inverse discrete Fourier transform, the repetitive processing, the insertion of the cyclic prefix, and the like on the first preamble sequence can be referred to the prior art, and details are not described herein again. .
  • the terminal device may map the first preamble sequence to the network device on the first time-frequency resource.
  • the first time-frequency resource mentioned herein may include, for example, one time domain resource that allows the first preamble sequence to be transmitted and one frequency domain resource that allows the first preamble sequence to be transmitted.
  • the terminal device may map the first preamble sequence on one RACH frequency domain resource to generate one preamble symbol (symbol). Then, the terminal device can transmit the one preamble symbol on one RACH time-frequency symbol.
  • the method of generating the preamble sequence set by using 64 ZC sequences in one cell in the LTE communication system is generated by the 64 ZC sequences.
  • the number of preamble sequence sets is greater than 64. Therefore, the probability that a plurality of terminal devices use the same preamble sequence set to generate a preamble sequence requesting access to the cell to be accessed may be reduced, that is, the probability that multiple terminal devices simultaneously use the same preamble sequence to request access to the cell may be reduced (ie, the randomization is reduced). Access collision probability), so that the RACH capacity of the cell can be increased.
  • the length of the first preamble sequence sent by the terminal device is the length of one ZC sequence
  • the length of the first preamble sequence can be kept the same as the length of the preamble sequence transmitted by the terminal device in the LTE communication system. That is, the preamble sequence set can be generated using the ZC sequence generated by the ZC root sequence having the same length as the ZC root sequence in the LTE communication system.
  • the time-frequency resource size used by the terminal device to transmit the first preamble sequence may be the same as the time-frequency resource used when the terminal device in the LTE communication system transmits the preamble sequence.
  • the terminal device may send the first preamble sequence along the subcarrier interval used by the terminal device in the LTE communication system to transmit the preamble sequence, so that the first preamble sequence sent by the terminal device has better anti-delay extension performance, and supports The radius of the cell is large.
  • FIG. 3B is a schematic flowchart diagram of another random access method according to an embodiment of the present application.
  • the terminal device when the terminal device sends a first preamble sequence generated by adding the J preamble sequences in the first preamble sequence set to the network device on the first time-frequency resource, the network device may be in the first time.
  • the first random access sequence sent by the terminal device is detected on the frequency resource.
  • the method includes:
  • the network device selects at least one second preamble sequence set from the preamble sequence set group according to the X first preamble sequences received on the first time-frequency resource.
  • the network device Because the location of the different terminal devices is different, when the other terminal device sends the first preamble sequence to the network device at the same time, the network device receives the first time sent by the other terminal device and the terminal device at the same time. The reception time of the preamble sequence is different. Therefore, the network device can distinguish the first preamble sequence sent by the foregoing terminal device by using the location of the TA.
  • the network device may perform a Fourier transform on the first preamble sequence to transform the first preamble sequence from the time domain to the frequency domain.
  • the network device also performs a Fourier transform on the preamble sequence in each preamble sequence set in the preamble sequence set.
  • the network device performs frequency domain correlation, inverse Fourier transform and power delay spectrum calculation on the first preamble sequence and the preamble sequence set in the preamble sequence set to obtain at least one second preamble sequence set.
  • the received power of each preamble sequence in the at least one second preamble sequence set may be greater than or equal to a preset first threshold.
  • the size of the first threshold may be determined according to the configuration of the network device.
  • the network device performs the frequency domain correlation, the inverse Fourier transform, and the power delay spectrum calculation on the preamble sequence set in the first preamble sequence group and the preamble sequence set group, and may use the prior art manner. This will not be repeated here.
  • the network device determines, according to the at least one second preamble sequence set, a set of preamble sequences corresponding to the X first random sequences.
  • the J preamble sequences in the at least one second preamble sequence set subjected to the frequency domain correlation may be coherently combined.
  • the network device may perform inverse Fourier transform and power delay spectrum calculation on each of the coherently combined second preamble sequence sets to obtain the received power of each second preamble sequence set.
  • the first preamble sequence generated by the terminal device using the J preamble sequences is sent on one frequency domain resource that is allowed to send the first preamble sequence, that is, the J preamble sequences that constitute the first preamble sequence.
  • the channel environment is the same. Therefore, the network device combines the J preamble sequences in each of the second preamble sequence sets after the Fourier transform by means of coherent combining, and the received power of each second preamble sequence set obtained is more accurate. .
  • the network device may use the second preamble sequence set with the maximum received power and greater than the preset second threshold as the preamble sequence set corresponding to the first random sequence.
  • the size of the second threshold may be determined according to the configuration of the network device.
  • the network device may use the preamble ID of the preamble sequence set corresponding to the first random sequence as the preamble ID corresponding to the first preamble sequence.
  • the preamble ID of the second preamble sequence set that is to receive the maximum power and is greater than the preset second threshold value is used as the preamble ID corresponding to the first preamble sequence.
  • step S106 For the processing procedure after the network device determines the preamble ID corresponding to the X first preamble sequences, refer to the description of step S106, and details are not described herein again.
  • FIG. 3C is a schematic structural diagram of a transmitter of another terminal device according to an embodiment of the present application.
  • the terminal device may correspond to the first preamble ID.
  • Each preamble sequence in a preamble sequence set serves as a first preamble sequence. That is, X in the above X first random access sequences is equal to J.
  • the length Nzc of each first preamble sequence is equal to the length of one preamble sequence (ie, the ZC sequence) in the preamble sequence set.
  • the same first preamble sequence may exist in the X first preamble sequences, or any two preamble sequences in the X first preamble sequences may be different, according to the J preamble sequences included in the first preamble sequence set. Is it the same?
  • the terminal device may separately perform subcarrier mapping on the J first preamble sequences. Then, the terminal device may perform a discrete Fourier transform, a cyclic prefix, and the like on the J first preamble sequences.
  • the terminal device may perform a discrete Fourier transform, a cyclic prefix, and the like on the J first preamble sequences.
  • the first preamble sequence is a time domain sequence, a discrete Fourier transform needs to be performed before performing subcarrier mapping on each first preamble sequence. If the first preamble sequence is a frequency domain sequence, it is no longer necessary to perform a discrete Fourier transform before performing subcarrier mapping for each first preamble sequence.
  • the terminal device needs to perform the discrete pre-emble sequence on the first preamble sequence, according to the preamble sequence format. , repeating the X first preamble sequences. It should be noted that how the terminal device performs the discrete Fourier transform, the subcarrier mapping, the inverse discrete Fourier transform, the repetitive processing, the insertion of the cyclic prefix, and the like on the first preamble sequence can be referred to the prior art, and details are not described herein again. .
  • the terminal device may map the J first preamble sequences to the second time-frequency resource and send the information to the network device.
  • the second time-frequency resource referred to herein may include: one time domain resource that allows the first preamble sequence to be transmitted and X frequency domain resources that allow the first preamble sequence to be transmitted.
  • the terminal device may map the J first preamble sequences to the J RACH frequency domain resources respectively, and generate one preamble symbol (symbol). Then, the terminal device can transmit the one preamble symbol on one RACH time-frequency symbol.
  • the terminal device can reduce the probability that the preamble sequences generated by the multiple terminal devices are the same by using each preamble sequence of the first preamble sequence set corresponding to the first preamble ID as a first preamble sequence, that is, the probability can be reduced.
  • the terminal device simultaneously uses the same preamble sequence to request the probability of accessing the cell (ie, reduces the probability of random access collision), thereby improving the RACH capacity of the cell.
  • the network device when generating the preamble sequence set, may use a ZC root sequence whose length is equal to one-sixth of the ZC root sequence length in the LTE communication system, so that the terminal device corresponds to the first preamble ID.
  • the length of each of the first preamble sequences generated by the first preamble sequence set is one of J points of the preamble sequence in the LTE communication system.
  • the terminal device can transmit X first preamble sequences along the subcarrier interval used by the terminal device in the LTE communication system to transmit the preamble sequence, so that the first preamble sequence sent by the terminal device has better anti-delay extension performance and supports The radius of the cell is large.
  • FIG. 3D is a schematic flowchart diagram of still another random access method according to an embodiment of the present application.
  • the network device may detect, on the second time-frequency resource, the J first random connections sent by the terminal device. Into the sequence.
  • the method includes:
  • the network device selects at least one third preamble sequence set from the preamble sequence set group according to the J first preamble sequences received on the J frequency domain resources.
  • the network device Since the location of the different terminal devices is different, when the other terminal devices send the J first preamble sequences to the network device at the same time, the network device receives the other terminal devices and sends the same time at the same time. The reception time of the J first preamble sequences is different. Therefore, the network device can distinguish the J first preamble sequences sent by the foregoing terminal device by using the location of the TA.
  • the network device may perform Fourier transform on the J first preamble sequences to remove the J first preamble sequences from the first preamble sequence.
  • the time domain is transformed into the frequency domain.
  • the network device may perform subcarrier inverse mapping processing on the J Fourier-transformed first preamble sequences to separate the J Fourier-transformed first preamble sequences.
  • the network device also performs a Fourier transform on the preamble sequence in each preamble sequence set in the preamble sequence set.
  • the network device may perform frequency domain correlation, inverse Fourier transform, and power delay spectrum calculation on each of the first preamble sequence and the preamble sequence set in the preamble sequence set in order to obtain at least A collection of third preamble sequences.
  • the received power of each of the at least one third preamble sequence set is greater than or equal to a preset first threshold.
  • the network device performs subcarrier inverse mapping processing on the J Fourier-transformed first preamble sequences to separate the J first Fourier transformed first preamble sequences, and The network device performs the frequency domain correlation, the inverse Fourier transform and the power delay spectrum calculation on the preamble sequence set in the first preamble sequence and the preamble sequence set in the frequency domain, and can follow the prior art manner. I won't go into details here.
  • the network device determines, according to the at least one third preamble sequence set, a set of preamble sequences corresponding to the J first random sequences.
  • the network device may perform inverse Fourier transform, power delay spectrum calculation, and non-sequence on the at least one third preamble sequence set after performing frequency domain correlation. Coherently combining to obtain the received power of each third preamble sequence set.
  • the J first preamble sequences generated by the terminal device using the J preamble sequences are sent on the J frequency domain resources that allow the first preamble sequence to be sent, that is, the channel environments of the J preamble sequences are not. the same.
  • the network device adopts a non-coherent combining manner to perform non-coherent combining on the J preamble sequences in each third preamble sequence set after the power delay spectrum calculation, and the subsequent reception of each third preamble sequence set obtained.
  • the power is more accurate.
  • the network device may use the third preamble sequence set with the maximum received power and greater than the preset second threshold as the preamble sequence set corresponding to the first random sequence. Then, the network device may use the preamble ID of the preamble sequence set corresponding to the first random sequence as the preamble ID corresponding to the first preamble sequence.
  • the preamble ID of the third preamble sequence set that is to receive the maximum power and is greater than the preset second threshold value is used as the preamble ID corresponding to the first preamble sequence.
  • step S106 For the processing procedure after the network device determines the preamble ID corresponding to the J first preamble sequences, refer to the description of step S106, and details are not described herein again.
  • the process of detecting the J first preamble sequences by the network device shown in FIG. 3D is similar to the process of detecting the J first preamble sequences by the network device shown in FIG. 3B, and the only difference is that the network device in FIG. 3B The J first preamble sequences are detected in the code domain, and the network device in FIG. 3D detects the J first preamble sequences in the frequency domain.
  • each preamble sequence set in the preamble sequence set includes M preamble sequence subsets, each preamble sequence subset includes Y preamble sequences, and both M and Y are positive integers.
  • the subset of M preamble sequences included in a preamble sequence set may be the same or different. That is, the first preamble sequence set includes M preamble sequence subsets, and each preamble sequence subset includes Y preamble sequences.
  • each first preamble sequence is a preamble sequence obtained according to a preamble sequence subset in the first preamble sequence set.
  • the first preamble sequence set can be, for example, as shown in Table 2:
  • the foregoing network device broadcast preamble sequence set group configuration information may further include a value of M and a value of Y.
  • Each preamble sequence of the Y preamble sequences included in each preamble sequence subset is a ZC sequence. That is, each preamble sequence subset includes Y ZC sequences.
  • the Y ZC sequences may be the same ZC sequence, or may have at least one different ZC sequence, or may be all different ZC sequences.
  • these different ZC sequences may be sequences generated by the same ZC root sequence. That is, different ZC sequences randomly selected from a subset of cyclic shift sequences generated from a single ZC root sequence. In this implementation, any two of these different ZC sequences are orthogonal sequences.
  • these different ZC sequences may be sequences generated from multiple ZC root sequences. That is, different ZC sequences randomly selected from a subset of cyclic shift sequences generated from a plurality of ZC root sequences. In this implementation, any two of the different ZC sequences are quasi-orthogonal sequences.
  • the manner in which the foregoing terminal device generates the first random access sequence includes the following two implementation manners:
  • the terminal device may generate a first preamble sequence by adding the Y preamble sequences in each subset of the preamble sequence in the first preamble sequence set corresponding to the first preamble ID. . That is, X in the above X first random access sequences may be equal to M. In this implementation, the same first preamble sequence may exist in the M first preamble sequences, or any two preamble sequences in the M first preamble sequences may be different, and may be specifically configured according to the first preamble sequence set. Whether the subset of M preamble sequences included is identically determined. In a specific implementation, the terminal device may generate the first preamble sequence by adding the Y preamble sequences in the manner shown in the foregoing formula (1), and details are not described herein again.
  • the terminal device may perform processing such as subcarrier mapping, inverse discrete Fourier transform, and insertion of a cyclic prefix on the M first preamble sequences.
  • processing such as subcarrier mapping, inverse discrete Fourier transform, and insertion of a cyclic prefix on the M first preamble sequences.
  • the first preamble sequence is a time domain sequence
  • the discrete Fourier transform needs to be performed separately for each first preamble sequence before performing subcarrier mapping on the M first preamble sequences.
  • the first preamble sequence is a frequency domain sequence, it is not necessary to perform a discrete Fourier transform on each of the first preamble sequences before performing subcarrier mapping on the M first preamble sequences.
  • the terminal device needs to perform the discrete Fourier transform on the M first preamble sequences according to the preamble.
  • the sequence format repeats the processing of the M first preamble sequences. It should be noted that how the terminal device performs the discrete Fourier transform, the subcarrier mapping, the inverse discrete Fourier transform, the repetitive processing, the insertion of the cyclic prefix, and the like on the first preamble sequence can be referred to the prior art, and details are not described herein again. .
  • the terminal device may map the M first preamble sequences to the third time-frequency resource and send the information to the network device.
  • the third time-frequency resource referred to herein includes: M time domain resources that allow transmission of the first preamble sequence and one frequency domain resource that allows transmission of the first preamble sequence.
  • the terminal device may map the M first preamble sequences on one RACH frequency domain resource to generate M preamble symbols. Then, the terminal device may send the M preamble symbols on the M RACH time-frequency symbols.
  • the preamble sequence set generated by the 64 ZC sequences is used even if one cell in the LTE communication system uses 64 ZC sequences to generate a preamble sequence set.
  • the number is greater than 64. Therefore, the probability that a plurality of terminal devices use the same preamble sequence set to generate a preamble sequence requesting access to the cell to be accessed may be reduced, that is, the probability that multiple terminal devices simultaneously use the same preamble sequence to request access to the cell may be reduced (ie, the randomization is reduced). Access collision probability), so that the RACH capacity of the cell can be increased.
  • the terminal device since the terminal device needs to occupy M time domain resources to send M first preamble sequences, when the length of the M first preamble sequences is the same as the length of the preamble sequence transmitted by the terminal device in the LTE communication system, compared to LTE.
  • the sub-carrier spacing used by the terminal device to transmit the preamble sequence is increased.
  • the terminal device needs to increase the sub-carrier spacing used when transmitting the first preamble sequence, that is, reduce the length of the first preamble sequence. For example, the length of each first preamble sequence is one-third of the preamble sequence in the LTE communication system.
  • the network device when generating the preamble sequence set, may use a ZC root sequence whose length is equal to one-M of the ZC root sequence length in the LTE communication system, so that the terminal device is based on the first preamble ID.
  • the length of each of the first preamble sequences generated by the corresponding first preamble sequence set is one-third of the preamble sequence in the LTE communication system. In this way, the M first preamble sequences transmitted by the terminal device can be made to have better frequency offset performance.
  • FIG. 4A is a schematic flowchart diagram of still another random access method according to an embodiment of the present application.
  • the terminal device sends, to the network device, the first preamble sequence generated by adding the Y preamble sequences in a subset of the preamble sequence in the first preamble sequence set on the third time-frequency resource, the network device may be in the third time.
  • the first random access sequence sent by the terminal device is detected on the frequency resource.
  • the method includes:
  • the network device selects at least X first preamble sequence subsets from the preamble sequence set group according to the X first preamble sequences received on the X time domain resources.
  • the network device Since the location of the different terminal devices is different, when the other terminal devices send the M first preamble sequences to the network device at the same time, the network device receives the other terminal devices and sends the same time at the same time. The reception times of the M first preamble sequences are different. Therefore, the network device can distinguish the M first preamble sequences sent by the foregoing terminal device by using the location of the TA.
  • the network device may perform Fourier transform on each first preamble sequence to transform the first preamble sequence from the time domain. To the frequency domain.
  • the network device also performs a Fourier transform on the preamble sequence in each preamble sequence set in the preamble sequence set.
  • the network device may perform frequency domain correlation, inverse Fourier transform and power delay spectrum calculation on each of the preamble sequence subsets in each of the first preamble sequence and the preamble sequence set in the preamble sequence set group in the frequency domain. And obtaining at least one first preamble sequence subset corresponding to each first preamble sequence.
  • At least X first preamble sequence subsets corresponding to the M first preamble sequences may be greater than or equal to a preset first threshold.
  • the size of the first threshold may be determined according to the configuration of the network device.
  • the network device performs frequency domain correlation, inverse Fourier transform, and power delay spectrum calculation on each preamble sequence subset in the first preamble sequence and the preamble sequence set in the preamble sequence set group in the frequency domain.
  • the manner of the prior art can be followed, and will not be described again.
  • the network device determines, according to the at least one first preamble sequence subset, the at least one second preamble sequence subset on each time domain resource.
  • the network device After filtering the at least M first preamble sequence subsets from the preamble sequence set group, the network device combines the Y preamble sequences in each first preamble sequence subset on each time domain resource to maximize the received power. And the first preamble sequence subset greater than the second threshold value is used as the second preamble sequence subset. That is, the network device determines at least M preamble sequence subsets corresponding to the M first random sequences, and the at least M preamble sequence subsets may form at least one preamble sequence set.
  • the network device determines, according to the at least X second preamble sequence subsets determined on the X time domain resources, the preamble sequence set corresponding to the X first random sequences.
  • the at least M second preamble sequence subsets determined on the M time domain resources may be combined to maximize the received power.
  • the preamble sequence set that is greater than the third threshold value is used as the preamble sequence set corresponding to the X first random sequences.
  • the size of the third threshold may be determined according to the configuration of the network device.
  • the M first preamble sequences generated by the terminal device using the preamble sequence subset are sent on the M time domain resources that are allowed to send the first preamble sequence, that is, the channels of the M first preamble sequences.
  • the environment is different. Therefore, the network device adopts a non-coherent combining manner to perform non-coherent combining on the second preamble sequence subset after the power delay spectrum calculation, and the received power of each of the obtained preamble sequence sets is more accurate.
  • the network device may use the preamble ID of the preamble sequence set corresponding to the first random sequence as the preamble ID corresponding to the first preamble sequence.
  • the preamble ID of the preamble sequence set that is to receive the maximum power and is greater than the preset third threshold is used as the preamble ID corresponding to the first preamble sequence.
  • step S106 For the processing procedure after the network device determines the preamble ID corresponding to the X first preamble sequences, refer to the description of step S106, and details are not described herein again.
  • FIG. 4B is a schematic structural diagram of a transmitter of another terminal device according to an embodiment of the present application.
  • the terminal device may generate M first random access sequences, and the manner of generating the M first random access sequences may refer to the description of the first manner in the structure. This will not be repeated here.
  • the terminal device may separately perform subcarrier mapping on the M first preamble sequences. Then, the terminal device may perform a discrete Fourier transform, a cyclic prefix, and the like on the M first preamble sequences.
  • the terminal device may perform a discrete Fourier transform, a cyclic prefix, and the like on the M first preamble sequences.
  • the first preamble sequence is a time domain sequence
  • the discrete Fourier transform needs to be performed separately for each first preamble sequence before performing subcarrier mapping on the M first preamble sequences.
  • the first preamble sequence is a frequency domain sequence, it is not necessary to perform a discrete Fourier transform on each of the first preamble sequences before performing subcarrier mapping on the M first preamble sequences.
  • the terminal device needs to perform the discrete Fourier transform on the M first preamble sequences according to the preamble.
  • the sequence format repeats the M first preamble sequences. It should be noted that how the terminal device performs the discrete Fourier transform, the subcarrier mapping, the inverse discrete Fourier transform, the repetitive processing, the insertion of the cyclic prefix, and the like on the first preamble sequence can be referred to the prior art, and details are not described herein again. .
  • the terminal device may map the M first preamble sequences to the third time-frequency resource and send the information to the network device.
  • the third time-frequency resource mentioned here is different from the third time-frequency resource mentioned in the first mode.
  • the third time-frequency resource may include: M frequency domain resources that allow the first preamble sequence to be sent, and one time domain resource that allows the first preamble sequence to be sent.
  • the terminal device may map the M first preamble sequences on the M RACH frequency domain resources to generate one preamble symbol (symbol). Then, the terminal device can transmit the one preamble symbol on one RACH time-frequency symbol.
  • the preamble sequence set generated by the 64 ZC sequences is used even if one cell in the LTE communication system uses 64 ZC sequences to generate a preamble sequence set.
  • the number is greater than 64. Therefore, the probability that a plurality of terminal devices use the same preamble sequence set to access the preamble sequence of the cell to be accessed may be reduced, that is, the probability that multiple terminal devices simultaneously use the same preamble sequence to request access to the cell may be reduced (ie, reduced) Random access collision probability), so that the RACH capacity of the cell can be increased.
  • the network device when generating the preamble sequence set, may use a ZC root sequence whose length is equal to one-M of the ZC root sequence length in the LTE communication system, so that the terminal device corresponds to the first preamble ID.
  • the length of each of the first preamble sequences generated by the first preamble sequence set is one of the preamble sequences in the LTE communication system.
  • the terminal device can send the M first preamble sequences along the subcarrier interval used by the terminal device in the LTE communication system to transmit the preamble sequence, so that the M first preamble sequences sent by the terminal device have better anti-delay extension performance. , support the radius of the community is large.
  • the network device may detect, on the third time-frequency resource, the M first random accesses sent by the terminal device. sequence. For example, the network device may detect at least one preamble sequence subset corresponding to the first preamble sequence received in each frequency domain in the manner shown in FIG. 3B.
  • the network device may perform non-coherent combining on the at least M preamble sequence subsets corresponding to the M first preamble sequences to obtain the received power of the at least one preamble sequence set corresponding to the M first preamble sequences, and obtain the received power.
  • the preamble sequence set that is greater than the preset third threshold value is used as the preamble sequence set corresponding to the first random sequence.
  • the network device may use the preamble ID of the preamble sequence set corresponding to the first random sequence as the preamble ID corresponding to the first preamble sequence.
  • the preamble ID of the preamble sequence set that is to receive the maximum power and is greater than the preset third threshold is used as the preamble ID corresponding to the first preamble sequence.
  • step S106 For the processing procedure after the network device determines the preamble ID corresponding to the X first preamble sequences, refer to the description of step S106, and details are not described herein again.
  • the terminal device may use each preamble sequence in each preamble sequence set in the first preamble sequence set corresponding to the first preamble ID as a first preamble sequence. That is, X in the above X first random access sequences may be equal to the product of M and Y. In this implementation, the same first preamble sequence may exist in the X first preamble sequences, or any two preamble sequences in the X first preamble sequences may be different, according to the first preamble sequence set. Whether the subset of M preamble sequences included is identically determined.
  • the terminal device may perform subcarrier mapping on the first preamble sequence generated by using the preamble sequence in the same preamble sequence subset in the X first preamble sequences. Then, the terminal device may perform inverse discrete Fourier transform, insert cyclic prefix, and the like on the X first preamble sequences.
  • the terminal device may perform inverse discrete Fourier transform, insert cyclic prefix, and the like on the X first preamble sequences.
  • the first preamble sequence is a time domain sequence, performing discrete Fourier on each first preamble sequence before performing subcarrier mapping on the first preamble sequence generated by the preamble sequence in the same preamble sequence subset Leaf transformation.
  • the discrete Fourier transform is not required to be performed on each of the first preamble sequences before subcarrier mapping is performed on the first preamble sequence generated by the preamble sequence in the same preamble sequence subset.
  • the terminal device needs to perform the discrete Fourier transform on the X first preamble sequences, according to the preamble.
  • the sequence format repeats the processing of the X first preamble sequences.
  • the terminal device performs the discrete Fourier transform, the subcarrier mapping, the inverse discrete Fourier transform, the repetitive processing, the insertion of the cyclic prefix, and the like on the first preamble sequence can be referred to the prior art, and details are not described herein again. .
  • the terminal device may map the X first preamble sequences on the fourth time-frequency resource and send the information to the network device.
  • the fourth time-frequency resource referred to herein includes: M time domain resources that allow transmission of the first preamble sequence and Y frequency domain resources that allow transmission of the first preamble sequence.
  • the first preamble sequence generated by using the preamble sequence in the same preamble sequence subset is mapped on different frequency domain resources of the same time domain resource.
  • the terminal device may map the first preamble sequence generated by using the preamble sequence in the same preamble sequence subset to the Y RACH frequency domain resources, and generate M preamble symbols. Then, the terminal device may send the M preamble symbols on the M RACH time-frequency symbols.
  • the preamble sequence set generated by the 64 ZC sequences is used even if one cell in the LTE communication system uses 64 ZC sequences to generate a preamble sequence set.
  • the number is greater than 64. Therefore, the probability that a plurality of terminal devices use the same preamble sequence set to access the preamble sequence of the to-be-accessed cell is reduced by using one preamble ID corresponding to the Y preamble sequences, that is, the multiple terminal devices can be reduced in the same time.
  • the preamble sequence requests the probability of accessing the cell (ie, reduces the random access collision probability), thereby increasing the RACH capacity of the cell.
  • the terminal device since the terminal device needs to occupy M time domain resources to send X first preamble sequences, when the lengths of the M time domain resources are the same as the lengths of the time domain resources in which the terminal device sends the preamble sequence in the LTE communication system.
  • the terminal device needs to increase the subcarrier spacing used when transmitting the first preamble sequence, that is, reduce the length of the first preamble sequence, in comparison with the subcarrier spacing used by the terminal device in the LTE communication system to transmit the preamble sequence. .
  • the length of each first preamble sequence is one-third of the preamble sequence in the LTE communication system.
  • the network device when generating the preamble sequence set, may use a ZC root sequence whose length is equal to one-M of the ZC root sequence length in the LTE communication system, so that the terminal device is based on the first preamble ID.
  • the length of each of the first preamble sequences generated by the corresponding first preamble sequence set is one-third of the preamble sequence in the LTE communication system. In this way, the M first preamble sequences transmitted by the terminal device can be made to have better frequency offset performance.
  • the network device may detect the X first random access sequences sent by the terminal device on the fourth time-frequency resource. For example, the network device may detect at least one preamble sequence corresponding to the first preamble sequence received in each frequency domain of each time domain in the manner shown in FIG. 3D.
  • the network device may perform non-coherent combining on at least Y preamble sequences corresponding to the first preamble sequence in the Y frequency domains in the same time domain to maximize the received power and the preamble sequence that is greater than the preset second threshold value.
  • the set is a subset of at least one preamble sequence corresponding to the Y first preamble sequences on the time domain.
  • the network device may perform non-coherent combining on the at least M preamble sequence subsets in the M time domains to use the preamble sequence set with the maximum received power and greater than the preset third threshold as the preamble corresponding to the first random sequence. Sequence collection. Then, the network device may use the preamble ID of the preamble sequence set corresponding to the first random sequence as the preamble ID corresponding to the first preamble sequence. The preamble ID of the preamble sequence set that is to receive the maximum power and is greater than the preset third threshold is used as the preamble ID corresponding to the first preamble sequence.
  • step S106 For the processing procedure after the network device determines the preamble ID corresponding to the X first preamble sequences, refer to the description of step S106, and details are not described herein again.
  • each preamble sequence set in the preamble sequence set includes M preamble sequence subsets, each preamble sequence subset includes K preamble sequence groups, and each preamble sequence group includes Q preamble sequences, M, Both K and Q are positive integers.
  • the subset of M preamble sequences included in a preamble sequence set may be the same or different.
  • the K preamble sequence sets included in each preamble sequence subset may be the same or different. That is, the first preamble sequence set includes M preamble sequence subsets, each preamble sequence subset includes K preamble sequence groups, and each preamble sequence group includes Q preamble sequences.
  • each first preamble sequence is a preamble sequence obtained from a preamble sequence group.
  • the first preamble sequence set can be, for example, as shown in Table 3:
  • the network device broadcast preamble sequence set group configuration information may further include a value of M, a value of K, and a value of Q.
  • Each preamble sequence of the Q preamble sequences included in each preamble sequence group is a ZC sequence. That is, each preamble sequence set includes Q ZC sequences.
  • the Q ZC sequences may be the same ZC sequence, or may have at least one different ZC sequence, or may be all different ZC sequences.
  • these different ZC sequences may be sequences generated by the same ZC root sequence. That is, different ZC sequences randomly selected from the group of cyclic shift sequences generated from a single ZC root sequence. In this implementation, any two of these different ZC sequences are orthogonal sequences.
  • these different ZC sequences may be sequences generated from multiple ZC root sequences. That is, different ZC sequences randomly selected from the group of cyclic shift sequences generated from a plurality of ZC root sequences. In this implementation, any two of the different ZC sequences are quasi-orthogonal sequences.
  • the terminal device may generate a first preamble sequence by adding the Q preamble sequences in each of the preamble sequence groups in the first preamble sequence set. That is, X in the above X first random access sequences may be equal to the product of M and K. In this implementation, the same first preamble sequence may exist in the X first preamble sequences, or any two preamble sequences in the X first preamble sequences may be different, according to the first preamble sequence set. Whether the K sets of sets included in the M preamble sequence sets are identically determined.
  • the terminal device may separately perform subcarrier mapping on the first preamble sequence generated by using the preamble sequence in the preamble sequence group in the same preamble sequence set in the X first preamble sequences. Then, the terminal device may perform inverse discrete Fourier transform, insert cyclic prefix, and the like on the X first preamble sequences.
  • the terminal device may perform inverse discrete Fourier transform, insert cyclic prefix, and the like on the X first preamble sequences.
  • the first preamble sequence is a time domain sequence
  • each first preamble sequence needs to be separately Perform a discrete Fourier transform.
  • the first preamble sequence is a frequency domain sequence, it is not necessary to perform discrete Fourier on each first preamble sequence before subcarrier mapping is performed on the first preamble sequence generated by the K preamble sequence groups in the same preamble sequence subset. Leaf transformation.
  • the terminal device needs to perform the discrete Fourier transform on the X first preamble sequences, according to the preamble. The sequence format repeats the processing of the X first preamble sequences.
  • the terminal device performs the discrete Fourier transform, the subcarrier mapping, the inverse discrete Fourier transform, the repetitive processing, the insertion of the cyclic prefix, and the like on the first preamble sequence can be referred to the prior art, and details are not described herein again. .
  • the terminal device may map the X first preamble sequences to the fifth time-frequency resource and send the information to the network device.
  • the fifth time-frequency resource referred to herein includes: M time domain resources that allow transmission of the first preamble sequence and K frequency domain resources that allow transmission of the first preamble sequence.
  • the first preamble sequence generated by using the preamble sequence group in the same preamble sequence subset is mapped on different frequency domain resources of the same time domain resource.
  • the terminal device may map the first preamble sequence generated by using the preamble sequence group in the same preamble sequence subset to the K RACH frequency domain resources, and generate M preamble symbols. Then, the terminal device may send the M preamble symbols on the M RACH time-frequency symbols.
  • the preamble sequence set generated by the 64 ZC sequences is used even if one cell in the LTE communication system uses 64 ZC sequences to generate a preamble sequence set.
  • the number is greater than 64. Therefore, by multiplying 1 preamble ID by K by the number of preamble sequences, the probability that multiple terminal devices use the same preamble sequence set to request access to the preamble sequence of the cell to be accessed is greatly reduced, that is, multiple terminals can be reduced.
  • the device simultaneously uses the same preamble sequence to request the probability of accessing the cell (ie, reduces the random access collision probability), thereby improving the RACH capacity of the cell.
  • the terminal device since the terminal device needs to occupy M time domain resources to send X first preamble sequences, when the lengths of the M time domain resources are the same as the lengths of the time domain resources in which the terminal device sends the preamble sequence in the LTE communication system.
  • the terminal device needs to increase the subcarrier spacing used when transmitting the first preamble sequence, that is, reduce the length of the first preamble sequence, in comparison with the subcarrier spacing used by the terminal device in the LTE communication system to transmit the preamble sequence. .
  • the length of each first preamble sequence is one-third of the preamble sequence in the LTE communication system.
  • the network device when generating the preamble sequence set, may use a ZC root sequence whose length is equal to one-M of the ZC root sequence length in the LTE communication system, so that the terminal device is based on the first preamble ID.
  • the length of each of the first preamble sequences generated by the corresponding first preamble sequence set is one-third of the preamble sequence in the LTE communication system. In this way, the M first preamble sequences transmitted by the terminal device can be made to have better frequency offset performance.
  • the network device may detect the X first random access sequences sent by the terminal device on the fifth time-frequency resource. For example, the network device may detect at least one preamble sequence group corresponding to the first preamble sequence received in each frequency domain of each time domain in the manner shown in FIG. 3D.
  • the network device may perform non-coherent combining on the at least Y preamble sequence groups corresponding to the first preamble sequence in the Y frequency domains in the same time domain, to obtain the preamble sequence with the maximum receiving power and greater than the preset second threshold value.
  • the subset is used as a subset of at least one preamble sequence corresponding to the Y first preamble sequences on the time domain.
  • the network device may perform non-coherent combining on the at least M preamble sequence subsets in the M time domains to use the preamble sequence set with the maximum received power and greater than the preset third threshold as the preamble corresponding to the first random sequence. Sequence collection. Then, the network device may use the preamble ID of the preamble sequence set corresponding to the first random sequence as the preamble ID corresponding to the first preamble sequence. The preamble ID of the preamble sequence set that is to receive the maximum power and is greater than the preset third threshold is used as the preamble ID corresponding to the first preamble sequence.
  • step S106 For the processing procedure after the network device determines the preamble ID corresponding to the X first preamble sequences, refer to the description of step S106, and details are not described herein again.
  • the terminal device can obtain the X number of the first preamble sequence corresponding to the first preamble ID by using a preamble ID corresponding to the J preamble sequences in the preamble sequence set.
  • a preamble sequence is flexible and diverse. Therefore, when the terminal device generates the preamble sequence requesting access to the cell to be accessed in the foregoing manner, the probability that multiple terminal devices request the access to the cell by using the same preamble sequence at the same time (ie, reducing the probability of random access collision) may be reduced.
  • the RACH capacity of the cell can be increased.
  • FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure. As shown in FIG. 5, the terminal device may include: a processing module 11 and a sending module 12. among them,
  • the processing module 11 is configured to obtain a first random access identifier, and select a first random access sequence set corresponding to the first random access identifier in the random access sequence set group, where the random access sequence set group includes L random numbers Access sequence set, each random access sequence set includes J random access sequences, L and J are both positive integers, and J is greater than or equal to 2;
  • the sending module 12 is configured to send X first random access sequences to the network device, where X is a positive integer.
  • Each of the first random access sequences mentioned above is a random access sequence obtained according to the first random access sequence set.
  • X is equal to 1
  • the first random access sequence is: a random access sequence generated by adding J random access sequences in the first random access sequence set.
  • the J random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences, and the transmission powers of the J random access sequences may be the same.
  • the sending module 12 is specifically configured to: map the first random access sequence to the network device on the first time-frequency resource, where the first time-frequency resource includes: one that allows the first random access sequence to be sent. The time domain resource and one frequency domain resource that allows the first random access sequence to be transmitted.
  • X is equal to J
  • each first random access sequence is: a random access sequence in the first random access sequence set.
  • the sending module is configured to map the X first random access sequences on the second time-frequency resource to the network device, where the second time-frequency resource includes: a time domain resource that allows the first random access sequence to be sent X frequency domain resources that allow the first random access sequence to be transmitted.
  • the first random access sequence set includes M random access sequence subsets, each random access sequence subset includes Y random access sequences, and M and Y are positive integers;
  • the first random access sequence is a random access sequence obtained according to a subset of random access sequences.
  • X may be equal to M
  • each first random access sequence is: a random access sequence generated by adding Y random access sequences in a subset of random access sequences.
  • the Y random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences, and the transmission powers of the Y random access sequences may be the same.
  • the sending module 12 is configured to: map the first data sequence to the third time-frequency resource and send the data to the network device, where the third time-frequency resource includes: M time-domain resources that allow the first random access sequence to be sent.
  • a frequency domain resource that allows the first random access sequence to be sent; or the third time-frequency resource includes: one time domain resource that allows the first random access sequence to be sent, and M that allows the first random access sequence to be sent.
  • X may be equal to the product of Y and M, and each first random access sequence is: a random access sequence in a subset of random access sequences.
  • the sending module 12 is configured to: map the first data sequence to the fourth time-frequency resource and send the data to the network device, where the fourth time-frequency resource includes: M time-domain resources that allow the first random access sequence to be sent. And Y frequency domain resources that allow the first random access sequence to be transmitted.
  • the first random access sequence set includes M random access sequence subsets, and each random access sequence subset includes K random access sequence groups, and each random access sequence group includes Q random access sequences, wherein M, K and Q are positive integers; each first random access sequence is a random access sequence obtained according to a random access sequence group.
  • X may be equal to the product of M and K
  • each first random access sequence is: a random access sequence generated by adding Q random access sequences in a random access sequence group.
  • the Q random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences, and the transmission powers of the Q random access sequences may be the same.
  • the sending module 12 is configured to map the X first random access sequences to the network device on the fifth time-frequency resource, where the fifth time-frequency resource includes: M time-domain resources that allow the first random access sequence to be sent. And K frequency domain resources that allow the first random access sequence to be transmitted.
  • the terminal device provided by the embodiment of the present application may perform the action on the terminal device side in the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • the network device may include: a sending module 21, a receiving module 22, and a processing module 23. among them,
  • the sending module 21 is configured to broadcast random access sequence set group configuration information, where the random access sequence set group includes L random access sequence sets, and each random access sequence set includes J random access sequences, L and J Is a positive integer, and J is greater than or equal to 2;
  • the receiving module 22 is configured to receive X first random access sequences sent by the terminal device;
  • the processing module 23 is configured to detect X first random access sequences, and determine a random access identifier corresponding to the X first random access sequences, where X is a positive integer.
  • Each of the first random access sequences mentioned above is a random access sequence obtained according to the first random access sequence set.
  • X is equal to 1
  • the first random access sequence is: a random access sequence generated by adding J random access sequences in the first random access sequence set.
  • the J random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences, and the transmission powers of the J random access sequences may be the same.
  • the processing module 23 is specifically configured to detect X first random access sequences on the first time-frequency resource, where the first time-frequency resource includes: a time domain that allows the first random access sequence to be sent. The resource and a frequency domain resource that allows the first random access sequence to be transmitted.
  • the processing module 23 is specifically configured to: according to the X first random access sequences received by the receiving module 22 on the first time-frequency resource, select at least one second random access sequence from the random access sequence set. And collecting, according to the at least one second random access sequence set, determining a random access sequence set corresponding to the X first random sequences.
  • the processing module 23 is configured to combine the J random access sequences in each second random access sequence set to obtain a second random access sequence with a maximum received power and greater than a preset threshold.
  • the set is a set of random access sequences corresponding to the X first random sequences.
  • X is equal to J
  • each first random access sequence is: a random access sequence in the first set of random access sequences.
  • the processing module 23 is specifically configured to detect X first random access sequences on the second time-frequency resource, where the second time-frequency resource includes: a time domain that allows the first random access sequence to be sent. Resources and X frequency domain resources that are allowed to transmit the first random access sequence.
  • the processing module 23 is specifically configured to: according to the X first random access sequences received by the receiving module 22 on the X frequency domain resources, select at least one third random access sequence from the random access sequence set group. And collecting, according to the at least one third random access sequence set, determining a set of random access sequences corresponding to the X first random sequences.
  • the processing module 23 is specifically configured to combine the J random access sequences in each third random access sequence set to obtain a third random access sequence with a maximum received power and greater than a preset threshold.
  • the set is a set of random access sequences corresponding to the first random sequence.
  • the first random access sequence set includes M random access sequence subsets, each random access sequence subset includes Y random access sequences, and M and Y are positive integers;
  • the first random access sequence is a random access sequence obtained according to a subset of random access sequences.
  • X may be equal to M
  • each first random access sequence is: a random access sequence generated by adding Y random access sequences in a subset of random access sequences.
  • the Y random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences, and the transmission powers of the Y random access sequences may be the same.
  • the processing module 23 is configured to detect X first random access sequences on the third time-frequency resource, where the third time-frequency resource includes: M time domain resources that allow the first random access sequence to be sent, and one allowed to send The frequency domain resource of the first random access sequence; or the third time-frequency resource includes: one time domain resource that allows the first random access sequence to be transmitted, and M frequency domain resources that allow the first random access sequence to be sent.
  • the processing module 23 is specifically configured to receive the module according to the receiving module. Determining at least X first random access sequence subsets from the random access sequence set group by using the X first random access sequences received on the X time domain resources; Determining at least one second random access sequence subset to determine at least one second random access sequence subset; determining X first randoms according to at least X second random access sequence subsets determined on the X time domain resources A set of random access sequences corresponding to the sequence.
  • the processing module 23 is configured to combine the Y random access sequences in each of the first random access sequence subsets on each time domain resource to maximize the received power and exceed the preset threshold.
  • the first random access sequence subset is used as a second random access sequence subset.
  • the processing module 23 is configured to combine the at least X second random access sequence subsets according to the X time domain resources, and set the random access sequence set with the maximum received power and greater than the preset threshold as A set of random access sequences corresponding to the X first random sequences.
  • X is equal to the product of Y and M
  • each first random access sequence is: a random access sequence in a subset of random access sequences.
  • the processing module 23 is specifically configured to detect X first random access sequences on the fourth time-frequency resource, where the fourth time-frequency resource includes: M time-domain resources and Y allowed to send the first random access sequence.
  • the frequency domain resource of the first random access sequence is specifically configured to detect X first random access sequences on the fourth time-frequency resource, where the fourth time-frequency resource includes: M time-domain resources and Y allowed to send the first random access sequence.
  • the frequency domain resource of the first random access sequence is specifically configured to detect X first random access sequences on the fourth time-frequency resource, where the fourth time-frequency resource includes: M time-domain resources and Y allowed to send the first random access sequence.
  • the first random access sequence set includes M random access sequence subsets, and each random access sequence subset includes K random access sequence groups, and each random access sequence group includes Q random access sequences, wherein M, K and Q are positive integers; each first random access sequence is a random access sequence obtained according to a random access sequence group.
  • X is equal to the product of M and K
  • each first random access sequence is: a random access sequence generated by adding Q random access sequences in a random access sequence group.
  • the Q random access sequences are orthogonal ZC sequences or quasi-orthogonal ZC sequences, and the transmission powers of the Q random access sequences may be the same.
  • the processing module 23 is specifically configured to detect X first random access sequences on the fifth time-frequency resource, where the fifth time-frequency resource includes: M time-domain resources that allow the first random access sequence to be sent, and K allowed to send The frequency domain resource of the first random access sequence.
  • the processing module 23 is configured to use, as the X first random access sequences, the random access identifiers of the random access sequence sets corresponding to the X first random access sequences. Corresponding random access identifier.
  • the network device provided by the embodiment of the present application may perform the action on the network device side in the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the above implementation module may be a transmitter when the actual implementation is implemented, and may be a receiver when the receiving module is actually implemented.
  • the processing module can be implemented in software in the form of processing component calls; it can also be implemented in hardware.
  • the processing module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above processing module.
  • all or part of these modules can be integrated or implemented independently.
  • the processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
  • the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASICs), or one or more microprocessors (digital) Signal processor, DSP), or one or more field programmable gate arrays (FPGAs).
  • ASICs application specific integrated circuits
  • DSP digital signal processor
  • FPGAs field programmable gate arrays
  • the processing component can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program code.
  • these modules can be integrated and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 7 is a schematic structural diagram of another terminal device provided by the present application.
  • the terminal device may include: a processor 31 (for example, a CPU), a memory 32, and a transmitter 34; a transmitter 34 is coupled to the processor 31, and the processor 31 controls a transmitting action of the transmitter 34; the memory 32 may A high-speed random access memory (RAM) may be included, and a non-volatile memory (NVM) may also be included, such as at least one disk memory.
  • RAM random access memory
  • NVM non-volatile memory
  • Various instructions may be stored in the memory 32 for use.
  • the terminal device involved in the present application may further include: a receiver 33, a power source 35, a communication bus 36, and a communication port 37.
  • the receiver 33 and the transmitter 34 may be integrated in the transceiver of the terminal device or may be an independent transceiver antenna on the terminal device.
  • Communication bus 36 is used to implement a communication connection between components.
  • the communication port 37 is used to implement connection communication between the terminal device and other peripheral devices.
  • the memory 32 is used to store computer executable program code, and the program code includes instructions.
  • the instruction causes the processor 31 of the terminal device to perform processing of the terminal device in the foregoing method embodiment.
  • the action is such that the receiver 33 performs the receiving action of the terminal device in the foregoing method embodiment, so that the transmitter 34 performs the sending action of the terminal device in the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of another network device according to an embodiment of the present disclosure.
  • the network device may include a processor 41 (for example, a CPU), a memory 42, a receiver 43, and a transmitter 44.
  • the receiver 43 and the transmitter 44 are both coupled to the processor 41, and the processor 41 controls reception.
  • the receiving operation of the processor 43, the processor 41 controls the transmitting operation of the transmitter 44;
  • the memory 42 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored. , for performing various processing functions and implementing the method steps of the present application.
  • the network device involved in the present application may further include: a power source 45, a communication bus 46, and a communication port 47.
  • the receiver 43 and the transmitter 44 may be integrated in the transceiver of the network device or may be an independent transceiver antenna on the network device.
  • Communication bus 46 is used to implement a communication connection between components.
  • the communication port 47 is used to implement connection communication between the network device and other peripheral devices.
  • the memory 42 is used to store computer executable program code, and the program code includes instructions.
  • the instruction causes the processor 41 of the network device to perform the processing action of the network device in the foregoing method embodiment.
  • the receiver 43 is configured to perform the receiving action of the network device in the foregoing method embodiment, so that the transmitter 44 performs the sending operation of the network device in the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • a computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, computer instructions can be wired from a website site, computer, server or data center (eg Coax, fiber, digital subscriber line (DSL) or wireless (eg, infrared, wireless, microwave, etc.) is transmitted to another website, computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • Useful media can be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)).
  • plural refers to two or more.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character “/” in this article generally indicates that the contextual object is an “or” relationship; in the formula, the character “/” indicates that the contextual object is a "divide” relationship.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé d'accès aléatoire, un appareil, un dispositif, une puce, un support d'enregistrement, et un produit programme d'ordinateur. Le procédé comprend les étapes suivantes : un dispositif terminal acquiert un premier identifiant d'accès aléatoire; le dispositif terminal sélectionne, à partir d'un groupe d'ensembles de séquences d'accès aléatoire, un premier ensemble de séquences d'accès aléatoire correspondant au premier identifiant d'accès aléatoire, le groupe d'ensembles de séquences d'accès aléatoire comprenant L ensembles de séquences d'accès aléatoire, chacun des ensembles de séquences d'accès aléatoire comprenant J séquences d'accès aléatoire, L et J étant des entiers positifs, J étant supérieur ou égal à 2; et le dispositif terminal envoie, à un dispositif de réseau, X premières séquences d'accès aléatoire, X étant un nombre entier positif. Le procédé d'accès aléatoire, l'appareil, le dispositif, la puce, le support de stockage, et le produit programme d'ordinateur fournis par les modes de réalisation de la présente invention peuvent réduire la probabilité qu'une pluralité de dispositifs terminaux utilisent simultanément la même séquence d'accès aléatoire pour demander l'accès à une cellule (réduisant donc la probabilité d'une collision d'accès aléatoire), ce qui améliore la capacité RACH de la cellule.
PCT/CN2018/119624 2018-01-19 2018-12-06 Procédé d'accès aléatoire, appareil, dispositif, puce, support de stockage, et produit programme d'ordinateur WO2019141013A1 (fr)

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PCT/CN2019/072373 WO2019141244A1 (fr) 2018-01-19 2019-01-18 Procédé, appareil et dispositif d'accès aléatoire, puce, support de stockage, et produit programme d'ordinateur

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