WO2019062523A1 - Procédé d'accès aléatoire, dispositif de communication et terminal - Google Patents

Procédé d'accès aléatoire, dispositif de communication et terminal Download PDF

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Publication number
WO2019062523A1
WO2019062523A1 PCT/CN2018/104668 CN2018104668W WO2019062523A1 WO 2019062523 A1 WO2019062523 A1 WO 2019062523A1 CN 2018104668 W CN2018104668 W CN 2018104668W WO 2019062523 A1 WO2019062523 A1 WO 2019062523A1
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WO
WIPO (PCT)
Prior art keywords
backoff
random access
access preamble
terminal
network device
Prior art date
Application number
PCT/CN2018/104668
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English (en)
Chinese (zh)
Inventor
李宏
韩锋
Original Assignee
华为技术有限公司
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Publication date
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Publication of WO2019062523A1 publication Critical patent/WO2019062523A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—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 present application relates to the field of wireless communications, and in particular, to a random access method, a communication device, and a terminal.
  • Random access is one of the most basic functions of a cellular system, which makes it possible to establish a connection between a terminal and a network device.
  • the initiation of random access and the resources used are random, and the success of access is also random.
  • the random access procedure mainly includes two modes: random access based on the contention mode and random access based on the non-competitive mode.
  • the random access based on the contention mode mainly includes the following process: the terminal sends a random access preamble to the network device, and the network device sends a random access response to the terminal after receiving the random access preamble.
  • the network device carries a backoff value in the random access response. If the terminal does not successfully receive the random access response, the terminal determines a backoff time according to the backoff value, and re-initiates the random access procedure after the backoff time ends.
  • the present application provides a random access method, a communication device, and a terminal, so as to improve the probability that the terminal successfully performs random access.
  • the first aspect of the present application provides a random access method, including:
  • the network device determines the first configuration information
  • the network device sends the first configuration information to the first terminal, where the first configuration information includes: a first backoff parameter.
  • the first backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the backoff parameter may be selected in multiple ways, so that the backoff time determined by the terminal according to the backoff parameter and the backoff value is as different as possible from other terminals.
  • the method further includes:
  • the network device sends a response message to the first terminal, where the response message includes: a backoff value.
  • the network device receives the first random access preamble sent by the first terminal, including:
  • the network device receives P random access preambles sent by the first terminal, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is greater than 1. Integer.
  • the first configuration information further includes: a third backoff parameter
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble
  • the first configuration information may indicate multiple backoff parameters, and each backoff parameter corresponds to a different random access preamble, so that the terminal uses the corresponding backoff parameter to determine when the P random access preambles are sent next time.
  • the backoff time, the backoff time for implementing multiple random access preamble delays is as different as possible.
  • the sending, by the network device, the first configuration information to the first terminal includes:
  • the network device sends the first configuration information to the first terminal by using a radio resource control RRC signaling or a system broadcast message.
  • the method further includes:
  • the network device determines second configuration information
  • the network device sends the second configuration information to the second terminal, where the second configuration information includes: a second backoff parameter.
  • the second backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the sending the second configuration information to the first terminal includes:
  • the network device sends the second configuration information to the second terminal by using a radio resource control RRC signaling or a system broadcast message.
  • the method further includes:
  • the network device receives a fourth random access preamble sent by the first terminal according to the backoff value and the first backoff parameter.
  • the terminal determines the backoff time by using the backoff value and the backoff parameter sent to itself, and realizes that the backoff time adopted by multiple terminals is as different as possible.
  • a second aspect of the present application provides a random access method, including:
  • the first terminal receives the first configuration information that is sent by the network device, where the first configuration information includes: a first backoff parameter;
  • the first terminal stores the first backoff parameter.
  • the first backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the backoff parameter may be selected in multiple ways, so that the backoff time determined by the terminal according to the backoff parameter and the backoff value is as different as possible from other terminals.
  • the method further includes:
  • the first terminal receives a response message sent by the network device, where the response message includes: a backoff value.
  • the first terminal sends a first random access preamble to the network device, including:
  • the first terminal sends P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is an integer greater than 1. .
  • the first configuration information further includes: a third backoff parameter
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble
  • the first configuration information may indicate multiple backoff parameters, and each backoff parameter corresponds to a different random access preamble, so that the terminal uses the corresponding backoff parameter to determine when the P random access preambles are sent next time.
  • the backoff time, the backoff time for implementing multiple random access preamble delays is as different as possible.
  • the method further includes:
  • the first terminal sends a fourth random access preamble to the network device by using the backoff time.
  • the terminal determines the backoff time by using the backoff value and the backoff parameter sent to itself, and realizes that the backoff time adopted by multiple terminals is as different as possible.
  • the network device determines the backoff parameter for each terminal in the network, and sends the configuration information to the corresponding terminal, so that the backoff parameters obtained by the multiple terminals are as different as possible, and then the terminal is next time
  • the probability of different backoff time is greater, and the probability of mutual interference between terminals is greatly reduced.
  • a third aspect of the present application provides a random access method, including:
  • the network device sends a response message to the first terminal and the second terminal, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include the first a backoff indication and a second backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the second random access preamble identifier, the first backoff indication and the first random access identifier
  • the access preamble corresponds to
  • the second backoff indication corresponds to the second random access preamble
  • n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the backoff parameter may be selected in multiple ways, so that the backoff time determined by the terminal according to the backoff parameter and the backoff value is as different as possible from other terminals.
  • the network device receives the first random access preamble sent by the first terminal, including:
  • the network device receives P random access preambles sent by the first terminal, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is greater than 1. Integer.
  • the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the network device may receive multiple random access preambles sent by the same terminal, and determine the backoff indications corresponding to the random access preambles, so as to implement the different random access preamble corresponding backoff indications as different as possible.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the indication bits can be reduced, and resources are saved.
  • the fourth aspect of the present application provides a random access method, including:
  • the terminal sends a first random access preamble to the network device
  • the terminal receives the response message sent by the network device, where the response message includes: the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a second back-off indication, where the n random access preamble identifiers include the first random access preamble identifier and the second random access preamble identifier, the first backoff indication and the first random access preamble
  • the second backoff indication corresponds to the second random access preamble
  • n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the backoff parameter may be selected in multiple ways, so that the backoff time determined by the terminal according to the backoff parameter and the backoff value is as different as possible from other terminals.
  • the terminal sends a random access preamble to the network device, including:
  • the terminal sends P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access preamble, and P is an integer greater than 1.
  • the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the network device may receive multiple random access preambles sent by the same terminal, and determine the backoff indications corresponding to the random access preambles, so as to implement the different random access preamble corresponding backoff indications as different as possible.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the indication bits can be reduced, and resources are saved.
  • the network device receives the first random access preamble sent by the first terminal and the second random access preamble sent by the second terminal, and sends a response message to the first terminal and the second terminal, where
  • the multiple backoff indications are carried in a response message, and multiple terminals may receive the response message, and then determine a corresponding backoff indication according to the random access preamble sent by the terminal.
  • the probability that multiple terminals get different backoff indications is increased, and the probability that the terminal has different backoff times when transmitting the random access preamble next time is greater, and the probability of mutual interference between the terminals is greatly reduced.
  • a fifth aspect of the present application provides a random access method, including:
  • the network device receives P random access preambles sent by the first terminal, where the P random access preambles include: a first random access preamble and a third random access preamble, where P is an integer greater than one;
  • the network device sends a response message to the first terminal, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a third backoff Instructing, the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble, The third backoff indication corresponds to the third random access preamble, and n is an integer greater than one.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the backoff parameter may be selected in multiple ways, so that the backoff time determined by the terminal according to the backoff parameter and the backoff value is as different as possible from other terminals.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the indication bits can be reduced, and resources are saved.
  • the network device receives P random access preambles sent by the first terminal, including:
  • the network device receives P random access preambles sent by the first terminal through P beams.
  • the method before the network device sends the response message to the first terminal, the method further includes:
  • the network device determines the first backoff indication according to the service priority corresponding to the first random access preamble, and determines the third backoff indication according to the service priority corresponding to the third random access preamble.
  • a sixth aspect of the present application provides a random access method, including:
  • the first terminal sends P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is an integer greater than one;
  • the first terminal receives the response message sent by the network device, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a third a backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble, The third backoff indication corresponds to the third random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the first terminal sends P random access preambles to the network device, including:
  • the first terminal sends P random access preambles to the network device by using P beams.
  • the first backoff indication is determined by a service priority corresponding to the first random access preamble
  • the third backoff indication is determined by a service priority corresponding to the third random access preamble
  • the terminal sends multiple random access preambles to the network device, and the network device feeds back a response message to the terminal, where the response message includes: n backoff indications and n random access preamble identifiers, and backoff
  • the indication and the random access preamble are in one-to-one correspondence, so that when the terminal sends multiple random access preambles next time, the terminal determines the backoff time according to the backoff indication corresponding to each random access preamble, so that multiple random access preambles are used.
  • the transmission time may be different, avoiding interference between multiple random access preambles as much as possible.
  • a seventh aspect of the present application provides a communications apparatus, including:
  • a processing module configured to determine first configuration information
  • a sending module configured to send the first configuration information to the first terminal, where the first configuration information includes: a first backoff parameter.
  • the first backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the device further includes: a receiving module;
  • the receiving module is configured to receive a first random access preamble sent by the first terminal;
  • the sending module is further configured to send a response message to the first terminal, where the response message includes: a backoff value.
  • the receiving module is specifically configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: the first random access preamble and the first Three random access preambles, P is an integer greater than one.
  • the first configuration information further includes: a third backoff parameter
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble
  • the sending module is specifically configured to send the first configuration information to the first terminal by using a radio resource control RRC signaling or a system broadcast message.
  • the processing module is further configured to determine second configuration information.
  • the sending module is further configured to send the second configuration information to the second terminal, where the second configuration information includes: a second backoff parameter.
  • the second backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the sending module is specifically configured to send the second configuration information to the second terminal by using a radio resource control RRC signaling or a system broadcast message.
  • the receiving module is specifically configured to receive a fourth random access preamble sent by the first terminal according to the backoff value and the first backoff parameter.
  • the eighth aspect of the present application provides a terminal, including:
  • a receiving module configured to receive first configuration information that is sent by the network device, where the first configuration information includes: a first backoff parameter;
  • a storage module configured to store the first backoff parameter.
  • the first backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the terminal further includes: a sending module
  • the sending module is further configured to send a first random access preamble to the network device
  • the receiving module is further configured to receive a response message sent by the network device, where the response message includes: a backoff value.
  • the sending module is specifically configured to send P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access Access preamble, P is an integer greater than one.
  • the first configuration information further includes: a third backoff parameter
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble
  • the terminal may further include: a processing module, configured to determine a backoff time according to the first backoff parameter and the backoff value;
  • the sending module is further configured to send, by using the backoff time, a fourth random access preamble to the network device.
  • a ninth aspect of the present application provides a communication apparatus, including:
  • the receiving module is configured to receive a first random access preamble sent by the first terminal and a second random access preamble sent by the second terminal.
  • a sending module configured to send a response message to the first terminal and the second terminal, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a backoff indication and a second backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the second random access preamble identifier, the first backoff indication and the first The random access preamble corresponds to, the second backoff indication corresponds to the second random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the receiving module is specifically configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: the first random access preamble and the first Three random access preambles, P is an integer greater than one.
  • the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • a tenth aspect of the present application provides a terminal, including:
  • a sending module configured to send a first random access preamble to the network device
  • a receiving module configured to receive a response message sent by the network device, where the response message includes: the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff And the second random access preamble identifier includes the first random access preamble identifier and the second random access preamble identifier, the first backoff indication and the first random access Corresponding to the preamble, the second backoff indication corresponds to the second random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the sending module is specifically configured to send P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access Access preamble, P is an integer greater than one.
  • the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the eleventh aspect of the present application provides a communication apparatus, including:
  • a receiving module configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: a first random access preamble and a third random access preamble, where P is an integer greater than one;
  • a sending module configured to send a response message to the first terminal, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a third a backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble, The third backoff indication corresponds to the third random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the receiving module is configured to receive P random access preambles sent by the first terminal by using P parameter information (numerology); or receive the first terminal to pass P beams. P random access preambles sent.
  • the device further includes: a processing module, configured to determine, according to the service priority corresponding to the first random access preamble, the first backoff indication, according to the third random access preamble The business priority determines the third backoff as an indication.
  • a twelfth aspect of the present application provides a terminal, including:
  • a sending module configured to send P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is an integer greater than one;
  • a receiving module configured to receive a response message sent by the network device, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a third a backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble, The third backoff indication corresponds to the third random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the n backoff indications are consecutively arranged in the response message, and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the sending module is specifically configured to send P random access preambles to the network device by using P numerologies; or send P random access preambles to the network device by using P beams. .
  • the first backoff indication is determined by a service priority corresponding to the first random access preamble
  • the third backoff indication is determined by a service priority corresponding to the third random access preamble
  • a thirteenth aspect of the present application provides a communication device, the device comprising a processor and a memory, the memory for storing a program, and the processor calling a program stored in the memory to perform the method provided by the first aspect of the present application.
  • a fourteenth aspect of the present application provides a terminal, the apparatus comprising a processor and a memory, the memory is for storing a program, and the processor calls a program stored in the memory to perform the method provided by the second aspect of the present application.
  • a fifteenth aspect of the present application provides a communication apparatus, the apparatus comprising a processor and a memory, the memory is for storing a program, and the processor calls a program stored in the memory to perform the method provided by the third aspect of the present application.
  • a sixteenth aspect of the present application provides a terminal, the apparatus comprising a processor and a memory, the memory is for storing a program, and the processor calls a program stored in the memory to perform the method provided by the fourth aspect of the present application.
  • a seventeenth aspect of the present application provides a communication apparatus, the apparatus comprising a processor and a memory, the memory is for storing a program, and the processor calls a program stored in the memory to perform the method provided by the fifth aspect of the present application.
  • the eighteenth aspect of the present application provides a terminal, the apparatus comprising a processor and a memory, the memory is for storing a program, and the processor calls a program stored in the memory to perform the method provided by the sixth aspect of the present application.
  • a nineteenth aspect of the present application provides a communication device comprising at least one processing element (or chip) for performing the method of the above first aspect.
  • a twentieth aspect of the present application provides a terminal comprising at least one processing element (or chip) for performing the method of the above second aspect.
  • a twenty-first aspect of the present application provides a communication device comprising at least one processing element (or chip) for performing the method of the above third aspect.
  • a twenty-second aspect of the present application provides a terminal comprising at least one processing element (or chip) for performing the method of the above fourth aspect.
  • a twenty-third aspect of the present application provides a communication apparatus comprising at least one processing element (or chip) for performing the method of the above fifth aspect.
  • a twenty-fourth aspect of the present application provides a terminal comprising at least one processing element (or chip) for performing the method of the above sixth aspect.
  • a twenty-fifth aspect of the present application provides a program for performing the method of the above first aspect.
  • a twenty-sixth aspect of the present application provides a computer storage medium comprising the program of the twenty-fifth aspect.
  • a twenty-seventh aspect of the present application provides a program for performing the method of the above second aspect.
  • a twenty-eighth aspect of the present application provides a computer storage medium comprising the program of the twenty-seventh aspect.
  • a twenty-ninth aspect of the present application provides a program for performing the method of the above third aspect.
  • a thirtieth aspect of the present application provides a computer storage medium comprising the program of the twenty-ninth aspect.
  • a thirty-first aspect of the present application provides a program for performing the method of the above fourth aspect.
  • a thirty-second aspect of the present application provides a computer storage medium comprising the program of the thirty-first aspect.
  • a thirty-third aspect of the present application provides a program for performing the method of the above fifth aspect.
  • a thirty-fourth aspect of the present application provides a computer storage medium comprising the program of the thirty-third aspect.
  • a thirty-fifth aspect of the present application provides a program for performing the method of the above sixth aspect.
  • a thirty-sixth aspect of the present application provides a computer storage medium comprising the program of the thirty-fifth aspect.
  • a thirty-seventh aspect of the present application provides a random access method, including:
  • the first terminal sends a fourth random access preamble to the network device, where the fourth random access preamble is determined according to the backoff value and the first backoff parameter.
  • a thirty-eighth aspect of the present application provides a random access method, including:
  • the first terminal determines the backoff time according to the first backoff parameter and the backoff value
  • the first terminal sends the fourth random access preamble to the network device by using the backoff time.
  • the terminal determines the backoff time according to the backoff parameter and the backoff value that belongs to the terminal, and then sends the fourth random access preamble according to the backoff time, so that the backoff time used by the terminals is different in the scenario of multiple terminals.
  • the probability is greatly improved to avoid interference between terminals in the random access process.
  • a thirty-ninth aspect of the present application provides a communication apparatus, the apparatus comprising means or means for performing the methods provided by the various implementations of the thirty-seventh aspect and the thirty-seventh aspect.
  • a fortieth aspect of the present application provides a terminal, the terminal comprising a module or means for performing the methods provided by the various implementations of the thirty-eighth aspect and the thirty-eighth aspect.
  • a forty-first aspect of the present application provides a communication apparatus, the apparatus comprising a processor and a memory, the memory is for storing a program, and the processor calls a program stored in the memory to perform the method provided in the thirty-seventh aspect of the present application.
  • a forty-second aspect of the present application provides a terminal, the terminal comprising a processor and a memory, wherein the memory is used to store a program, and the processor calls a program stored in the memory to perform the method provided in the thirty-eighth aspect of the present application.
  • a forty-third aspect of the present application provides a communication apparatus comprising at least one processing element (or chip) for performing the method of the above thirty-seventh aspect.
  • the forty-fourth aspect of the present application provides a terminal comprising at least one processing element (or chip) for performing the method of the above 38th aspect.
  • the forty-fifth aspect of the present application provides a program for performing the method of the thirty-seventh aspect above.
  • the forty-sixth aspect of the present application provides a computer storage medium comprising the program of the forty-fifth aspect.
  • the forty-seventh aspect of the present application provides a program for performing the method of the thirty-eighth aspect above.
  • a forty-eighth aspect of the present invention provides a computer storage medium comprising the program of the forty-seventh aspect.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a random access method according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of a random access method according to another embodiment of the present disclosure.
  • FIG. 7 is a schematic flowchart of a random access method according to another embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a random access device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a random access apparatus according to another embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a random access apparatus according to still another embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • the embodiments of the present application can be applied to a wireless communication system.
  • the wireless communication system mentioned in the embodiments of the present application includes but is not limited to: Narrow Band-Internet of Things (NB-IoT), global mobile Global System for Mobile Communications (GSM), Enhanced Data Rate for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA) 2000 System (Code Division Multiple Access, CDMA2000), Time Division-Synchronization Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), and Next Generation 5G Mobile Communication System
  • eMBB Enhanced Mobile Broad Band
  • URLLC Massive Machine-Type Communications
  • mMTC Massive Machine-Type Communications
  • the terminal device includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset), and a portable device.
  • the terminal can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the terminal can be a mobile phone (or "cellular" phone), a computer with wireless communication function.
  • the terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device or device.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • the communication system 100 includes a network device 101 and a plurality of terminals 102.
  • the network device 101 can also be connected to the core network.
  • Network device 101 may also be in communication with an Internet Protocol (IP) network 200, such as the Internet, a private IP network, or other data network.
  • IP Internet Protocol
  • Network devices provide services to terminals within coverage.
  • network device 101 provides wireless access to one or more terminals within the coverage of network device 101.
  • network devices can also communicate with each other.
  • Network device 101 may be a device for communicating with a terminal.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • Evolved Node B, eNB evolved base station
  • the network device may also be a relay station, an access point, an in-vehicle device, or the like.
  • D2D Device to Device
  • the network device may also be a terminal functioning as a base station.
  • the terminal may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem, and various forms of user equipment (UE), mobile stations (mobile) Station, MS), etc.
  • the method provided by the present application is applicable not only to scenes with a small number of terminals, but also to scenes including a large number of terminals, such as massive Internet of Thing (mIoT), massive machine type communication (mMTC), and the like. . Interference conflicts in the random access process between terminals can be avoided as much as possible.
  • massive Internet of Thing mIoT
  • massive machine type communication mMTC
  • FIG. 2 is a schematic flowchart of a random access method according to an embodiment of the present disclosure, and the method may be applied to the wireless network shown in FIG. 1.
  • the wireless network may include a network device and m terminals.
  • the first terminal and the second terminal in the m terminals are used as an example.
  • the first terminal and the second terminal may be in the m terminals. Any two terminals.
  • the method includes:
  • the first terminal sends a first random access preamble (Preamble) to the network device, where the second terminal sends a second random access preamble to the network device.
  • Preamble a first random access preamble
  • the network device receives the first random access preamble (Preamble) sent by the first terminal and the second random access preamble sent by the second terminal.
  • Preamble the first random access preamble
  • the network device sends a response message to the first terminal and the second terminal.
  • the first terminal and the second terminal receive the response message.
  • the response message includes: n backoff indications, and n random access preamble identifiers (RAPIDs).
  • the n backoff indications include: a first backoff indication and a second backoff indication.
  • the n random access preamble identifiers include a first random access preamble identifier and a second random access preamble identifier.
  • the first backoff indication corresponds to the first random access preamble
  • the second backoff indication corresponds to the second random access preamble.
  • n is an integer greater than one. In one possible design, n is less than or equal to m. m is an integer greater than zero.
  • the terminal After receiving the response message, the terminal stores the backoff indication in the response message. Specifically, the n backoff indications may be stored, and the related backoff indication may be stored.
  • the first terminal may store the first random access preamble. Corresponding first backoff indication.
  • the terminal uses the stored backoff indication to determine the backoff value, and then randomly selects a value between the 0 and the backoff value as the backoff time, and sends the random access preamble after delaying the backoff time.
  • the response message may include n random access preamble identifiers, that is, the random access preamble identifier may be in one-to-one correspondence with the n backoff indications.
  • the backoff indications obtained by multiple terminals may be different. The probability that the backoff time is different when the random access preamble is transmitted next time is greater, and the probability of mutual interference between the terminals is greatly reduced.
  • the response message may further include n Media Access Control (MAC) random access response (RAR), and the n random access preambles may also be combined with n MAC RARs.
  • the MAC RAR is used to reply to the corresponding random access preamble, and may specifically include: a Timing Advance Command, an uplink grant (UL Grant), a temporary (Cell Radio Network Temporary Identity, C-RNTI), and the like.
  • the uplink authorization indicates the resources used by the terminal for the uplink transmission information 3 (MSG3), including time-frequency location, whether frequency hopping, power control, and the like.
  • the network device receives the first random access preamble sent by the first terminal and the second random access preamble sent by the second terminal, and then sends a response message to the first terminal and the second terminal, where multiple backoffs are sent.
  • the indication is carried in a response message, and multiple terminals can receive the response message, and then determine a corresponding backoff indication according to the random access preamble sent by the terminal.
  • the probability that multiple terminals get different backoff indications is increased, and the probability that the terminal has different backoff times when transmitting the random access preamble next time is greater, and the probability of mutual interference between the terminals is greatly reduced.
  • the backoff indication is a backoff value or a backoff parameter.
  • the response message directly carries n backoff values. Since different random access preambles may correspond to different backoff values, after receiving the response message, the terminal may identify the random access preamble sent by itself, and then You can get your own backoff value and store the backoff value. Next, when transmitting the random access preamble, a value is selected from 0 to the backoff value as the backoff time.
  • the network device may send a default backoff value to the terminal through other messages in advance.
  • the default backoff value is sent to the terminal by, for example, RRC signaling or a system broadcast message.
  • the response message carries n backoff parameters.
  • the terminal can directly obtain its own backoff parameter according to the mapping relationship between the random access preamble and the backoff parameter, and store the backoff parameter.
  • the backoff time is determined according to the backoff parameter. It should be noted that if the terminal does not receive the backoff value sent by the network device after receiving the backoff parameter, the terminal may use a default value as the default backoff value, such as 0, or a preset value, which is not used here. limit.
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the backoff coefficient is multiplied by the default backoff value, and the obtained result is taken as the backoff time.
  • the value of the backoff coefficient can be [0, 1], but not limited to this.
  • the value of the backoff offset value may be [-L, L], and L is an integer greater than 0.
  • the default backoff value is added or subtracted from the backoff offset value, if the obtained result is greater than or equal to 0, it is directly used as the backoff time. If it is less than 0, 0 is taken as the backoff time.
  • each backing interval index corresponds to a value interval, as shown in Table 1.
  • the terminal sends the random access preamble next time, acquires a value interval according to the corresponding backoff interval index, and randomly determines a value in the value interval as the backoff time.
  • the value ranges corresponding to different backoff interval indexes are different, and the probability that the backoff times determined by multiple terminals are the same is also greatly reduced.
  • the terminal obtains the value interval "60-70” when sending the random access preamble next time, and in this value interval "60-70" A value is randomly determined as the backoff time.
  • the terminal may support multiple antennas, or support multiple antennas on one antenna, and the terminal may initiate multiple random accesses through different beams or antennas, that is, the network may be The device sends multiple random access preambles.
  • the terminal can also support multiple parameter information, and the parameter information can be numerology, and the terminal can send multiple random access preambles to the network device by using different numerologies.
  • multiple random access preambles sent by the terminal may be different, and the network device may configure different backoff indications according to different random access preambles.
  • the network device receives the first random access preamble sent by the first terminal, where the network device receives the P random access preambles sent by the first terminal.
  • the P random access preambles include: the first random access preamble and the third random access preamble, and P is an integer greater than 1.
  • the response message sent by the network device includes a first backoff indication corresponding to the first random access preamble, and a third backoff indication corresponding to the third access random preamble. That is, the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the physical characteristics or service types of the different antennas/beams/numerology are different, and the physical characteristics may include at least one of the following: a supported resource type, a subcarrier spacing, a transmission time interval (TTI), Cyclic prefix (CP), etc.
  • the service types may include: Enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low-Latency Communication (URLLC), machine type communication (MTC), and the like.
  • the network device may determine the backoff indication according to the antenna/beam/numerology that receives the random access preamble. For example, the network device receives the random access preamble sent by the first terminal by using multiple numerologies, and the service priority corresponding to the multiple numerologies is different, so when the network device determines the backoff indication, the service with high priority has a shorter backoff time and priority. The low-level service backoff time can be longer, and the backoff indication is determined separately. In this way, when the terminal uses the multiple numerologies to send the random access preamble next time, the backoff time determined according to the backoff indication is different, and the probability of interference can also be reduced.
  • the first backoff indication is determined by the service priority corresponding to the first random access preamble.
  • the third backoff indication is determined by the service priority corresponding to the third random access preamble.
  • the terminal determines the backoff time according to the backoff indication corresponding to each random access preamble, so that the transmission times of the P random access preambles may be different, and multiple random connections are avoided as much as possible. Interference between the preambles.
  • a correspondence between the random access preamble and the antenna/beam/numerology may exist.
  • the terminal may determine each backoff in the n backoff indications according to the random access preamble identifier in the response message. Indicate the corresponding "antenna/beam/numerology".
  • each backoff indication may correspond to each antenna/beam/numerology.
  • different antennas/beams/numerology have different physical characteristics or service types.
  • the first random access preamble sent by the first terminal on the first beam the first backoff indication is obtained from the response message.
  • the first backoff time is determined according to the first backoff indication, and the random access preamble is sent on the first beam after delaying the first backoff time.
  • the first first terminal uses the first random access preamble sent by the first numerology, and obtains the first backoff indication from the response message.
  • the first backoff time is determined according to the first backoff indication, and the random access preamble is sent on the first numerology after delaying the first backoff time.
  • FIG. 3 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present invention. As shown in FIG. 3, n backoff indications are consecutively arranged in the response message, and n random access preamble identifiers are consecutively arranged.
  • n backoff indications (denoted as BI, Backoff Indicator) and n RAPIDs are located in the MAC header.
  • the first n blocks respectively include n BIs (denoted as BI1 to BIn), and each block further includes: an extension field (E), a type field (T), and a reserved bit (R), an extended field.
  • E is used to indicate that the MAC header further includes other fields, for example, E occupies 1 bit. When the value of "E" is 1, it indicates that there are other domains, for example, indicating that there is also a domain containing the RAPID; "E" When the value is 0, the indication is followed by MAC RAR, padding, and so on.
  • T is used to indicate whether the box contains a RAPID or a BI indication. For example, T is set to “0", indicating that the BI value is included, and if it is "1", it indicates that the RAPID is included.
  • each subheader includes an extension field (E) and a type field (T), which are the same as the foregoing, and will not be described again.
  • E extension field
  • T type field
  • the MAC header may also include n MAC RARs afterwards, as well as padding that may exist for byte alignment.
  • FIG. 4 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present invention. As shown in FIG. 4, n backoff indications are consecutively arranged in the response message, and n random access preamble identifiers are consecutively arranged.
  • n random access preamble identifiers can be exchanged before the n backoff indications, that is, consecutive n backoff indications and consecutive n random access preambles.
  • E-T-R-R-BI 1 can mean that "E”, “T”, and “R” each occupy 1 bit, and “BI” occupies 4 bits.
  • E-T-RAPID can mean that "E” and “T” each occupy 1 bit, and "RAPID” occupies 6 bits.
  • FIG. 5 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present disclosure. As shown in FIG. 5, n backoff indications and n random access preamble identifiers are arranged in intervals in the response message, where n A random access preamble identifier in the backoff indication is adjacent to one of the n random access preamble identifiers.
  • a BI is followed by a RAPID
  • the RAPID can be followed by a corresponding MAC RAR.
  • the order of BI and RAPID can also be exchanged, for example, a RAPID followed by a corresponding BI, followed by a corresponding MAC RAR.
  • the box containing BI also contains “T” and "R”
  • the box containing the RAPID may also contain "T” and "R”.
  • the above response message may be a protocol data unit (PDU), but is not limited thereto.
  • the response message can be carried in message 2 (MSG2).
  • FIG. 6 is a schematic flowchart of a random access method according to another embodiment of the present disclosure. As shown in FIG. 6, the method includes:
  • the network device determines first configuration information.
  • the first configuration information includes: a first backoff parameter.
  • the network device sends the first configuration information to the first terminal by using RRC signaling or a system broadcast message.
  • a list may be sent, and multiple configuration information is included in the list, and each configuration information corresponds to a different terminal, or corresponds to a different random access preamble, and is not limited herein.
  • the network device sends the first configuration information to the first terminal.
  • the first terminal After receiving the first configuration information, the first terminal stores the first backoff parameter indicated in the first configuration information.
  • the backoff time is determined according to the first backoff parameter, and the random access preamble is sent after the backoff time is delayed.
  • the network device determines the backoff parameter for each terminal in the network, and sends the configuration information to the corresponding terminal, so that the backoff parameters obtained by the multiple terminals are as different as possible, and then the terminal sends the random access preamble next time.
  • the probability that the backoff time is different is greater, and the probability of mutual interference between the terminals is greatly reduced.
  • the first backoff parameter may be any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the first backoff parameter may also be a first backoff value, that is, the network device allocates different backoff values for each terminal, and then the probability that multiple terminals in the network determine different backoff times according to different backoff values is improved. The probability of interference between each other is greatly reduced.
  • the method further includes: receiving, by the network device, the first random access preamble sent by the first terminal.
  • the network device sends a response message to the first terminal, where the response message includes a backoff value.
  • This embodiment is similar to the embodiment shown in FIG. 2, and the network device can uniformly reply response messages to multiple terminals.
  • the terminal After receiving the backoff value, the terminal stores it. Before the next time the random access preamble is sent, the backoff value and the corresponding backoff parameter are used to determine the backoff time. For example, the first terminal determines the backoff time according to the first backoff parameter and the backoff value before sending the random access preamble next time.
  • the fourth random access preamble is sent in the following manner.
  • the fourth random access preamble may be the same as or different from the previously sent random access preamble, and is not limited in this application.
  • the first terminal determines the backoff time according to the first backoff parameter and the backoff value, and the first terminal uses the backoff time to send the fourth random access preamble to the network device. Specifically, after determining that the fourth random access preamble is sent, the first terminal delays the backoff time and sends a fourth random access preamble.
  • the backoff coefficient when the random access preamble is transmitted next time, the backoff coefficient is multiplied by the backoff value, and the obtained result is taken as the backoff time.
  • the value of the backoff coefficient can be [0, 1], but not limited to this.
  • the backoff value when the random access preamble is transmitted next time, the backoff value is added or subtracted by the backoff value, and the obtained result is used as the backoff time.
  • the value of the backoff offset value can be [-L, L], and L is an integer greater than 0. It should be noted that if the backoff value is added or subtracted from the backoff offset value, if the obtained result is greater than or equal to 0, it is directly used as the backoff time. If it is less than 0, 0 is taken as the backoff time.
  • each backing interval index corresponds to a value interval, as shown in Table 1.
  • the terminal sends the random access preamble next time, acquires a value interval according to the corresponding backoff interval index, and randomly determines a value in the value interval as the backoff time.
  • the value ranges corresponding to different backoff interval indexes are different, and the probability that the backoff times determined by multiple terminals are the same is also greatly reduced.
  • the network device may further determine the second configuration information, and send the second configuration information to the second terminal, where the configuration information includes the second backoff parameter.
  • the second backoff parameter may be different from the first backoff parameter, that is, the network device configures different backoff parameters for multiple terminals in the network.
  • the second backoff parameter includes any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the manner in which the second terminal determines the backoff time according to the second backoff parameter and the backoff value is the same as that of the first terminal, and details are not described herein again.
  • the network device sends the second configuration information to the second terminal by using RRC signaling or a system broadcast message.
  • the network device receives the first random access preamble sent by the first terminal, where the network device receives the P random access preambles sent by the first terminal, and the P random access preambles.
  • the method includes: the first random access preamble and a third random access preamble, where P is an integer greater than 1.
  • the terminal may support multiple antennas, or support multiple antennas on one antenna, and the terminal may initiate multiple random accesses through different beams or antennas, that is, multiple transmissions may be sent to the network device. Random access preamble. It is also possible that the terminal supports multiple numerologies, and the terminal can send multiple random access preambles to the network device on the numerology.
  • the first terminal sends P random access preambles to the network device, where the first terminal sends P random access preambles to the network device through P numerologies. Or the first terminal sends P random access preambles to the network device by using P beams.
  • the service priority of the multiple random access preambles sent by the same terminal may be different.
  • the network device may determine the backoff parameters corresponding to the random access preambles according to the service priority corresponding to the random access preamble.
  • the first configuration information sent by the network device may include multiple backoff parameters, and each backoff parameter corresponds to a different random access preamble.
  • the first configuration information further includes: a third backoff parameter.
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble.
  • the first backoff indication is determined by a service priority corresponding to the first random access preamble.
  • the third backoff indication is determined by the service priority corresponding to the third random access preamble.
  • the terminal determines the backoff time according to the backoff parameters corresponding to each random access preamble, so that the transmission times of the P random access preambles may be different, and multiple random connections are avoided as much as possible. Interference between the preambles.
  • each backoff parameter may correspond to each antenna/beam/numerology.
  • different antennas/beams/numerology have different physical characteristics or service types.
  • the terminal may determine the mapping relationship between the backoff parameter and the antenna/beam/numerology in advance, and use the corresponding backoff parameter when sending a random access preamble on different antennas/beams/numerology.
  • the first backoff time is determined according to the first backoff parameter and the backoff value, and the random access preamble is sent on the first beam after delaying the first backoff time.
  • the first backoff time is determined according to the first backoff parameter and the backoff value, and the first numerology is used to send the random access preamble after delaying the first backoff time.
  • FIG. 7 is a schematic flowchart of a random access method according to another embodiment of the present disclosure. As shown in FIG. 7, the method includes:
  • the first terminal sends P random access preambles to the network device.
  • the P random access preambles include: a first random access preamble and a third random access preamble, and P is an integer greater than 1.
  • the first terminal may be any terminal in the network, which is not limited herein.
  • one terminal may send multiple random access preambles to the network device.
  • the network device sends a response message to the first terminal.
  • the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a third backoff indication.
  • the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble, where the The three backoff indication corresponds to the third random access preamble, and n is an integer greater than one.
  • the first terminal stores n backoff indications.
  • the terminal when the terminal sends the P random access preambles, the terminal determines the backoff time according to the backoff indication corresponding to each random access preamble, so that the transmission times of the P random access preambles may be different. It is possible to avoid interference between multiple random access preambles.
  • each terminal is processed in the same manner as the first terminal, and is not exemplified.
  • the terminal sends multiple random access preambles to the network device, and the network device feeds back a response message to the terminal, where the response message includes: n backoff indications and n random access preamble identifiers, backoff indication, and random access.
  • the one-to-one correspondence of the preambles enables the terminal to determine the backoff time according to the backoff indication corresponding to each random access preamble when the multiple random access preambles are sent next time, so that the transmission times of multiple random access preambles may be different. Avoid interference between multiple random access preambles as much as possible.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the response message directly carries the n backoff values, and the first terminal obtains the backoff value corresponding to each random access preamble according to the mapping relationship between the random access preamble and the backoff value, and stores the backoff values.
  • a value is selected from 0 to the backoff value as the backoff time.
  • the network device may send a default backoff value to the terminal through other messages in advance.
  • the response message carries n backoff parameters.
  • the terminal may obtain the backoff parameters corresponding to each random access preamble according to the mapping relationship between the random access preamble and the backoff parameters, and store the backoff parameters.
  • the backoff time of each random access preamble is determined according to the backoff parameter.
  • the backoff parameter is the backoff coefficient
  • the backoff coefficient is multiplied by the backoff value, and the obtained result is used as the backoff time.
  • the value of the backoff coefficient can be [0, 1], but not limited to this.
  • the backoff parameter is the backoff offset value
  • the backoff value is added or subtracted by the backoff value, and the obtained result is used as the backoff time.
  • the value of the backoff offset value may be [-L, L], and L is an integer greater than 0. It should be noted that if the backoff value is added or subtracted from the backoff offset value, if the obtained result is greater than or equal to 0, it is directly used as the backoff time. If it is less than 0, 0 is taken as the backoff time.
  • each backing interval index corresponds to a value interval, as shown in Table 1.
  • the terminal sends the random access preamble next time, acquires a value interval according to the corresponding backoff interval index, and randomly determines a value in the value interval as the backoff time.
  • the value ranges corresponding to different backoff interval indexes are different, and the probability that the backoff times determined by multiple terminals are the same is also greatly reduced.
  • the terminal may support multiple antennas, or support multiple antennas on one antenna, and the terminal may initiate multiple random accesses through different beams or antennas, that is, multiple random random transmissions may be sent to the network device. Access the preamble. It is also possible that the terminal supports multiple numerologies, and the terminal can send multiple random access preambles to the network device by using different numerologies.
  • the network device receives the P random access preambles sent by the first terminal, where the network device receives the P random access preambles sent by the first terminal by using the P numerologies; or
  • the network device receives P random access preambles sent by the first terminal through P beams.
  • multiple random access preambles sent by the first terminal may be different, and the network device may configure different backoff indications according to different random access preambles.
  • the network device before the network device sends the response message to the first terminal, the network device further includes: determining, by the network device, the first backoff indication according to the service priority corresponding to the first random access preamble, according to the third random access preamble The service priority determines a third backoff indication.
  • a correspondence between the random access preamble and the antenna/beam/numerology may exist.
  • the terminal may determine, according to the random access preamble identifier in the response message, corresponding to each backoff indication in the n backoff indications. Antenna/beam/numerology".
  • each backoff indication may correspond to each antenna/beam/numerology.
  • different antennas/beams/numerology have different physical characteristics or service types.
  • the first random access preamble sent by the first terminal on the first beam the first backoff indication is obtained from the response message.
  • the first backoff time is determined according to the first backoff indication, and the random access preamble is sent on the first beam after delaying the first backoff time.
  • the previous first terminal sends the first random access preamble by using the first numerology, and obtains the first backoff indication from the response message.
  • the first terminal uses the first numerology to send the random access preamble
  • the first backoff time is determined according to the first backoff indication
  • the first numerology is used to send the random access preamble after delaying the first backoff time.
  • the n backoff indications are consecutively arranged and the n random access preamble identifiers are consecutively arranged; or, the n backoff indications and the n random access preamble identifiers are arranged in intervals in the response message, where And a random access preamble identifier of the n backoff indications is adjacent to one of the n random access preamble identifiers.
  • the above response message may be a protocol data unit (PDU), but is not limited thereto.
  • the response message can be carried in message 2 (MSG2).
  • FIG. 3 and FIG. 4 show two manners of n consecutive retraction indication consecutive arrangements and consecutive arrangement of the n random access preamble identifiers.
  • 5 shows, in a response message, n backoff indications and n random access preamble identifier interval arrangements, wherein one of the n backoff indications and one of the n random access preamble identifiers Adjacent. I will not repeat them here.
  • the terminal after receiving the random access preamble, the terminal monitors whether a response message is received in the monitoring window (preset time period), and if not received, adds 1 to the monitoring variable (PREAMBLE_TRANSMISSION_COUNTER). And determining whether the value of the monitored variable reaches a preset threshold. If the preset threshold is reached, the random access fails to be reported to the upper layer. If the preset threshold is not reached, the backoff time is determined, and the random access procedure is initiated again after the backoff time. That is, the random access preamble is sent to the network device again, and the random access preamble sent again may be the same as or different from the access preamble sent last time.
  • the method in the foregoing embodiment mainly involves the terminal determining the backoff time according to the backoff value, and the backoff time determined by the plurality of terminals in the network is as different as possible.
  • FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure, where the device may be integrated into the network device.
  • the apparatus includes: a processing module 801 and a transmitting module 802, wherein:
  • the processing module 801 is configured to determine first configuration information.
  • the sending module 802 is configured to send the first configuration information to the first terminal, where the first configuration information includes: a first backoff parameter.
  • the first backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • FIG. 9 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application. As shown in FIG. 9, the apparatus may further include: a receiving module 901, configured to receive, by using the first terminal, A random access preamble.
  • a receiving module 901 configured to receive, by using the first terminal, A random access preamble.
  • the sending module 802 is further configured to send a response message to the first terminal, where the response message includes: a backoff value.
  • the receiving module 901 is specifically configured to receive a fourth random access preamble that is sent by the first terminal according to the backoff value and the first backoff parameter.
  • the receiving module 901 is specifically configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: the first random access The preamble and the third random access preamble, P is an integer greater than one.
  • the first configuration information further includes: a third backoff parameter.
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble
  • the sending module 802 is specifically configured to send the first configuration information to the first terminal by using a radio resource control RRC signaling or a system broadcast message.
  • processing module 801 is further configured to determine second configuration information.
  • the sending module 802 is further configured to send the second configuration information to the second terminal, where the second configuration information includes: a second backoff parameter.
  • the second backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the sending module 802 is specifically configured to send the second configuration information to the second terminal by using a radio resource control RRC signaling or a system broadcast message.
  • FIG. 10 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure. As shown in FIG. 10, the device includes: a receiving module 110 and a storage module 111, wherein:
  • the receiving module 110 is configured to receive first configuration information that is sent by the network device, where the first configuration information includes: a first backoff parameter.
  • the storage module 111 is configured to store the first backoff parameter.
  • the first backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • FIG. 11 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure. As shown in FIG. 11, the terminal further includes: a sending module 112.
  • the sending module 112 is further configured to send the first random access preamble to the network device.
  • the receiving module 110 is further configured to receive a response message sent by the network device, where the response message includes: a backoff value.
  • the sending module 112 is configured to send, to the network device, P random access preambles, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is greater than 1. The integer.
  • the first configuration information further includes: a third backoff parameter.
  • the first backoff parameter corresponds to the first random access preamble
  • the third backoff parameter corresponds to the third random access preamble
  • the terminal may further include a processing module 113, configured to determine a backoff time according to the first backoff parameter and the backoff value.
  • the sending module 112 is further configured to send the fourth random access preamble to the network device by using the backoff time.
  • FIG. 12 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure.
  • the device may be integrated into a network device.
  • the device includes: a receiving module 120 and a sending module 121, where:
  • the receiving module 120 is configured to receive a first random access preamble sent by the first terminal and a second random access preamble sent by the second terminal.
  • the sending module 121 is configured to send a response message to the first terminal and the second terminal.
  • the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a second backoff indication, where the n random access preamble identifiers include the a first random access preamble identifier and the second random access preamble identifier, where the first backoff indication corresponds to the first random access preamble, the second backoff indication and the second random access preamble
  • n is an integer greater than one.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the receiving module 120 is configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is An integer greater than one.
  • the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the n backoff indications are consecutively arranged and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • FIG. 13 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure. As shown in FIG. 13, the terminal includes: a sending module 131 and a receiving module 132, where:
  • the sending module 131 is configured to send a first random access preamble to the network device.
  • the receiving module 132 is configured to receive a response message sent by the network device, where the response message includes: the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include the first a backoff indication and a second backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the second random access preamble identifier, the first backoff indication and the first random access identifier
  • the access preamble corresponds to
  • the second backoff indication corresponds to the second random access preamble
  • n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the sending module 131 is specifically configured to send, to the network device, P random access preambles, where the P random access preambles include: the first random access preamble and the third random access preamble, P Is an integer greater than 1.
  • the n backoff indications further include: a third backoff indication, where the third backoff indication corresponds to the third random access preamble.
  • the n backoff indications are consecutively arranged and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • FIG. 14 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure.
  • the device may be integrated into a network device.
  • the device includes: a receiving module 141 and a sending module 142, where:
  • the receiving module 141 is configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: a first random access preamble and a third random access preamble, where P is an integer greater than 1.
  • the sending module 142 is configured to send a response message to the first terminal, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a a third backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble
  • the third backoff indication corresponds to the third random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the n backoff indications are consecutively arranged and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the receiving module 141 is specifically configured to receive P random access preambles sent by the first terminal by using P parameter information (numerology); or, receive P pieces sent by the first terminal by using P beams. Random access preamble.
  • FIG. 15 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure.
  • the device further includes: a processing module 151, configured to respond according to the first random access preamble, as shown in FIG.
  • the service priority determines the first backoff indication, and determines the third backoff indication according to the service priority corresponding to the third random access preamble.
  • FIG. 16 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure. As shown in FIG. 16, the device includes: a sending module 161 and a receiving module 162, where:
  • the sending module 161 is configured to send P random access preambles to the network device, where the P random access preambles include: the first random access preamble and the third random access preamble, where P is an integer greater than 1.
  • the receiving module 162 is configured to receive a response message sent by the network device, where the response message includes: n backoff indications and n random access preamble identifiers, where the n backoff indications include a first backoff indication and a a third backoff indication, where the n random access preamble identifiers include the first random access preamble identifier and the third random access preamble identifier, where the first backoff indication corresponds to the first random access preamble
  • the third backoff indication corresponds to the third random access preamble, and n is an integer greater than 1.
  • the backoff indication is a backoff value or a backoff parameter
  • the backoff parameter is any one of the following: a backoff coefficient, a backoff offset value, and a backoff interval index.
  • the n backoff indications are consecutively arranged and the n random access preamble identifiers are consecutively arranged;
  • the n backoff indications and the n random access preamble identifiers are arranged in an interval, wherein the random access preamble identifier and the n random access preamble identifiers in the n backoff indications One of the backoff indications is adjacent.
  • the sending module 161 is specifically configured to send P random access preambles to the network device by using P numerologies; or send P random access preambles to the network device by using P beams.
  • the first backoff indication is determined by a service priority corresponding to the first random access preamble
  • the third backoff indication is determined by a service priority corresponding to the third random access preamble.
  • the foregoing device may be used to perform the method provided in the foregoing method embodiment, and the specific implementation manner and the technical effect are similar, and details are not described herein again.
  • each module of the above device is only a division of a logical function, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated.
  • these modules can all be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by 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.
  • the implementation of other modules is similar.
  • all or part of these modules can be integrated or implemented independently.
  • the processing elements described herein can be an integrated circuit that has 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 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. 17 is a schematic structural diagram of a random access device according to another embodiment of the present disclosure.
  • the device may be integrated into the foregoing network device or terminal. As shown in FIG. 17, the device includes: a memory 10 and a processor 11.
  • the memory 10 can be a separate physical unit and can be connected to the processor 11 via a bus.
  • the memory 10 and the processor 11 can also be integrated together, implemented by hardware or the like.
  • the memory 10 is used to store a program for implementing the above method embodiments, or the modules of the embodiment shown in FIG. 8 to FIG. 16, and the processor 11 calls the program to perform the operations of the above method embodiments.
  • the processor 11 determines the first configuration information, and sends the first configuration information to the first terminal, where the first configuration information includes: a first backoff parameter.
  • the processor 11 receives the first configuration information that is sent by the network device, where the first configuration information includes: a first backoff parameter; and the first backoff parameter is stored.
  • the random access device may also include only the processor.
  • the memory for storing the program is located outside the random access device, and the processor is connected to the memory through the circuit/wire for reading and executing the program stored in the memory.
  • the processor can be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP.
  • CPU central processing unit
  • NP network processor
  • the processor may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
  • the memory may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory.
  • RAM random-access memory
  • non-volatile memory such as a flash memory.
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory may also include a combination of the above types of memories.
  • the embodiment of the present application further provides a computer storage medium, which is stored with a computer program, which is used to execute the random access method provided by the foregoing embodiment.
  • the embodiment of the present application further provides a computer program product comprising instructions, which when executed on a computer, causes the computer to execute the random access method provided by the foregoing embodiment.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

L'invention concerne un procédé d'accès aléatoire, un dispositif de communication et un terminal, le procédé comprenant les étapes suivantes : un dispositif de réseau détermine des premières informations de configuration ; envoyer les premières informations de configuration à un premier terminal, les premières informations de configuration comprenant : un premier paramètre de temporisation. Grâce à la présente invention, des paramètres de temporisation obtenus par de multiples terminaux peuvent être aussi différents que possible, et il y a une probabilité plus grande qu'une durée de temporisation soit différente lorsque le terminal transmet un préambule d'accès aléatoire dans la durée suivante, de telle sorte que la probabilité de brouillage mutuel entre des terminaux est fortement réduite.
PCT/CN2018/104668 2017-09-28 2018-09-07 Procédé d'accès aléatoire, dispositif de communication et terminal WO2019062523A1 (fr)

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