CN109587813B - Random access method, communication device and terminal - Google Patents

Random access method, communication device and terminal Download PDF

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Publication number
CN109587813B
CN109587813B CN201710901714.3A CN201710901714A CN109587813B CN 109587813 B CN109587813 B CN 109587813B CN 201710901714 A CN201710901714 A CN 201710901714A CN 109587813 B CN109587813 B CN 109587813B
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China
Prior art keywords
random access
terminal
backoff
access preamble
configuration information
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CN201710901714.3A
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Chinese (zh)
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CN109587813A (en
Inventor
李宏
韩锋
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201710901714.3A priority Critical patent/CN109587813B/en
Priority to PCT/CN2018/104668 priority patent/WO2019062523A1/en
Publication of CN109587813A publication Critical patent/CN109587813A/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
    • 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

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

Abstract

The application provides a random access method, a communication device and a terminal, wherein the method comprises the following steps: the network equipment determines first configuration information; the first configuration information is sent to a first terminal, wherein the first configuration information comprises: a first backoff parameter. The method realizes that the backoff parameters obtained by a plurality of terminals are as different as possible, so that the probability of different backoff time of the terminals when the terminals send random access preambles next time is larger, and the probability of mutual interference between the terminals is greatly reduced.

Description

Random access method, communication device and terminal
Technical Field
The present application relates to the field of wireless communications, and in particular, to a random access method, a communication device, and a terminal.
Background
Random access is one of the most basic functions of cellular systems, which makes it possible for terminals to establish a connection with network devices. The initiation of random access and the resources adopted have randomness, and whether the access is successful or not has randomness. Specifically, the random access procedure mainly includes two ways: contention mode-based random access and non-contention mode-based random access. The random access based on the competition mode mainly comprises the following procedures: 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 back-off value in the random access response, if the terminal does not successfully receive the random access response, the terminal determines a back-off time according to the back-off value, and reinitiates the random access process after the back-off time is over.
However, in the prior art, the probability of mutual interference between terminals is still high because all terminals in the network determine the back-off time based on the same back-off value, and the probability of successful random access of the terminals is low.
Disclosure of Invention
The application provides a random access method, a communication device and a terminal, so as to improve the probability of successful random access of the terminal.
The first aspect of the present application provides a random access method, including:
the network equipment determines first configuration information;
the network device sends the first configuration information to a first terminal, wherein the first configuration information comprises: a first backoff parameter.
In one possible design, the first backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In this embodiment, the backoff parameter may be selected in various ways, so as to achieve that the backoff time determined by the terminal according to the backoff parameter and the backoff value is different from other terminals as much as possible.
In one possible design, the method further comprises:
the network equipment receives a first random access preamble sent by the first terminal;
the network device sends a response message to the first terminal, wherein the response message comprises: a backoff value.
In one possible design, the network device receives a 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: and P is an integer greater than 1.
In one possible design, the first configuration information further includes: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
In this embodiment, the first configuration information may indicate a plurality of backoff parameters, where each backoff parameter corresponds to a different random access preamble, so that when the terminal sends P random access preambles next time, the terminal determines backoff times by using the corresponding backoff parameters, so as to implement that the backoff times of the plurality of random access preambles are as different as possible.
In one possible design, the network device sending the first configuration information to the first terminal includes:
the network device sends the first configuration information to the first terminal through Radio Resource Control (RRC) signaling or system broadcast messages.
In one possible design, the method further comprises:
the network equipment determines second configuration information;
the network device sends the second configuration information to a second terminal, wherein the second configuration information comprises: and a second backoff parameter.
In one possible design, the second backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, the sending the second configuration information to the first terminal includes:
the network device sends the second configuration information to the second terminal through Radio Resource Control (RRC) signaling or system broadcast messages.
In one possible design, the method further comprises:
and the network equipment receives a fourth random access preamble sent by the first terminal according to the back-off value and the first back-off parameter.
In this embodiment, the terminal determines the backoff time by using the backoff value and the backoff parameter sent to itself, so that the backoff times adopted by the plurality of terminals are different as much as possible.
A second aspect of the present application provides a random access method, including:
the method comprises the steps that a first terminal receives first configuration information sent by network equipment, wherein the first configuration information comprises the following steps: a first backoff parameter;
The first terminal stores the first backoff parameter.
In one possible design, the first backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index. In this embodiment, the backoff parameter may be selected in various ways, so as to achieve that the backoff time determined by the terminal according to the backoff parameter and the backoff value is different from other terminals as much as possible.
In one possible design, the method further comprises:
the first terminal sends a first random access preamble to the network equipment;
the first terminal receives a response message sent by the network device, wherein the response message comprises: a backoff value.
In one possible design, the first terminal sending a first random access preamble to the network device includes:
the first terminal sends P random access preambles to the network device, wherein the P random access preambles comprise: and P is an integer greater than 1.
In one possible design, the first configuration information further includes: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
In this embodiment, the first configuration information may indicate a plurality of backoff parameters, where each backoff parameter corresponds to a different random access preamble, so that when the terminal sends P random access preambles next time, the terminal determines backoff times by using the corresponding backoff parameters, so as to implement that the backoff times of the plurality of random access preambles are as different as possible.
In one possible design, the method further comprises:
the first terminal determines a back-off time according to the first back-off parameter and the back-off value;
and the first terminal sends a fourth random access preamble to the network equipment by adopting the back-off time.
In this embodiment, the terminal determines the backoff time by using the backoff value and the backoff parameter sent to itself, so that the backoff times adopted by the plurality of terminals are different as much as possible.
In the random access method provided by the application, the network equipment determines the back-off parameters for each terminal in the network, and sends the back-off parameters to the corresponding terminal through the configuration information, so that the back-off parameters obtained by a plurality of terminals are different as much as possible, and further the probability that the back-off time is different when the terminal sends the random access preamble next time is larger, and the probability of mutual interference between the terminals is greatly reduced.
A third aspect of the present application provides a random access method, including:
the network equipment receives a first random access preamble sent by a first terminal and a second random access preamble sent by a second terminal;
the network device sends a response message to the first terminal and the second terminal, wherein the response message comprises: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a second back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the second random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the second back-off indication corresponds to the second random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In this embodiment, the backoff parameter may be selected in various ways, so as to achieve that the backoff time determined by the terminal according to the backoff parameter and the backoff value is different from other terminals as much as possible.
In one possible design, the network device receives a 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: and P is an integer greater than 1.
In one possible design, the n backoff indications further comprise: and a third backoff indication, the third backoff indication corresponding to the third random access preamble.
In this embodiment, the network device may receive multiple random access preambles sent by the same terminal, and determine backoff instructions corresponding to the random access preambles, so as to implement that backoff instructions corresponding to different random access preambles are as different as possible.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In this embodiment, when the n backoff indicators and the n random access preamble identifiers are arranged at intervals, the indicator bits may be reduced, and resources may be saved.
A fourth aspect of the present application provides a random access method, including:
the terminal sends a first random access preamble to the network equipment;
the terminal receives a response message sent by the network device, wherein the response message comprises: the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a second back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the second random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the second back-off indication corresponds to the second random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In this embodiment, the backoff parameter may be selected in various ways, so as to achieve that the backoff time determined by the terminal according to the backoff parameter and the backoff value is different from other terminals as much as possible.
In one possible design, the terminal sends a random access preamble to the network device, including:
The terminal sends P random access preambles to the network device, wherein the P random access preambles comprise: and P is an integer greater than 1.
In one possible design, the n backoff indications further comprise: and a third backoff indication, the third backoff indication corresponding to the third random access preamble.
In this embodiment, the network device may receive multiple random access preambles sent by the same terminal, and determine backoff instructions corresponding to the random access preambles, so as to implement that backoff instructions corresponding to different random access preambles are as different as possible.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In this embodiment, when the n backoff indicators and the n random access preamble identifiers are arranged at intervals, the indicator bits may be reduced, and resources may be saved.
In the random access method provided by the application, the network equipment receives the first random access preamble sent by the first terminal and the second random access preamble sent by the second terminal, and further sends response messages to the first terminal and the second terminal, wherein a plurality of back-off instructions are carried in one response message, and the plurality of terminals can receive the response message and then determine the corresponding back-off instructions according to the random access preamble sent by the network equipment. The probability that a plurality of terminals obtain different backoff instructions is increased, and further the probability that the backoff time is different when the terminals send random access preambles next time is larger, so that 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 equipment receives P random access preambles transmitted by a first terminal, wherein the P random access preambles comprise: the first random access preamble and the third random access preamble, P is an integer greater than 1;
the network device sends a response message to the first terminal, wherein the response message comprises: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a third back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In this embodiment, the backoff parameter may be selected in various ways, so as to achieve that the backoff time determined by the terminal according to the backoff parameter and the backoff value is different from other terminals as much as possible.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In this embodiment, when the n backoff indicators and the n random access preamble identifiers are arranged at intervals, the indicator bits may be reduced, and resources may be saved.
In one possible design, the network device receives P random access preambles sent by the first terminal, including:
the network equipment receives P random access preambles sent by the first terminal through P parameter information (numerology); or alternatively, the process may be performed,
The network device receives P random access preambles transmitted by the first terminal through P beams.
In one possible design, 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, wherein the P random access preambles comprise: the first random access preamble and the third random access preamble, P is an integer greater than 1;
the first terminal receives a response message sent by the network device, wherein the response message comprises: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a third back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In one possible design, 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 through P numerologies; or alternatively, the process may be performed,
and the first terminal sends P random access preambles to the network equipment through P wave beams.
In one possible design, the first back-off indication is determined by a traffic priority corresponding to the first random access preamble, and the third back-off indication is determined by a traffic priority corresponding to the third random access preamble.
In the random access method provided by the application, a terminal sends a plurality of random access preambles to a network device, the network device feeds back a response message to the terminal, and the response message comprises: the n backoff instructions and the n random access preamble identifiers are in one-to-one correspondence, so that when the terminal transmits a plurality of random access preambles next time, the backoff time is determined according to the backoff instruction corresponding to each random access preamble before, and therefore, the transmission time of the plurality of random access preambles may be different, and interference among the plurality of random access preambles is avoided as much as possible.
A seventh aspect of the present application provides a communication apparatus comprising:
the processing module is used for determining first configuration information;
the sending module is configured to send the first configuration information to a first terminal, where the first configuration information includes: a first backoff parameter.
In one possible design, the first backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, the apparatus further comprises: a receiving module;
the receiving module is used for receiving 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.
In one possible design, the receiving module is specifically configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: and P is an integer greater than 1.
In one possible design, the first configuration information further includes: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
In one possible design, the sending module is specifically configured to send the first configuration information to the first terminal through radio resource control RRC signaling or a system broadcast message.
In one possible design, the processing module is further configured to determine the second configuration information.
The sending module is further configured to send the second configuration information to a second terminal, where the second configuration information includes: and a second backoff parameter.
In one possible design, the second backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, the sending module is specifically configured to send the second configuration information to the second terminal through radio resource control RRC signaling or a system broadcast message.
In one possible design, 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.
An eighth aspect of the present application provides a terminal, comprising:
the receiving module is configured to receive first configuration information sent by a network device, where the first configuration information includes: a first backoff parameter;
and the storage module is used for storing the first back-off parameter.
In one possible design, the first backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, the terminal further comprises: a transmitting 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.
In one possible design, the sending module is specifically configured to send P random access preambles to the network device, where the P random access preambles include: and P is an integer greater than 1.
In one possible design, the first configuration information further includes: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
In one possible design, the terminal may further include: a processing module, configured to determine a back-off time according to the first back-off parameter and the back-off value;
the sending module is further configured to send a fourth random access preamble to the network device using the back-off time.
A ninth aspect of the present application provides a communication apparatus comprising:
and the receiving module is used for receiving the first random access preamble sent by the first terminal and the 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 back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a second back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the second random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the second back-off indication corresponds to the second random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, the receiving module is specifically configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: and P is an integer greater than 1.
In one possible design, the n backoff indications further comprise: and a third backoff indication, the third backoff indication corresponding to the third random access preamble.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
A tenth aspect of the present application provides a terminal, comprising:
a sending module, configured to send a first random access preamble to a 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 back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a second back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the second random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the second back-off indication corresponds to the second random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, the sending module is specifically configured to send P random access preambles to the network device, where the P random access preambles include: and P is an integer greater than 1.
In one possible design, the n backoff indications further comprise: and a third backoff indication, the third backoff indication corresponding to the third random access preamble.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
An eleventh aspect of the present application provides a communication apparatus comprising:
the receiving module 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, P is an integer greater than 1;
a sending module, configured to send a response message to the first terminal, where the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a third back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In one possible design, the receiving module is specifically configured to receive P random access preambles sent by the first terminal through P parameter information (numerology); or, receiving P random access preambles sent by the first terminal through P beams.
In one possible design, the apparatus further comprises: and the processing module is used for determining the first back-off instruction according to the service priority corresponding to the first random access preamble and determining the third back-off instruction according to the service priority corresponding to the third random access preamble.
A twelfth aspect of the present application provides a terminal, comprising:
a sending module, configured to send P random access preambles to a network device, 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;
a receiving module, configured to receive a response message sent by the network device, where the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a third back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
In one possible design, the backoff indication is a backoff value or a backoff parameter, which is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one possible design, n of the backoff indicators in the response message are arranged consecutively and the n random access preamble identifiers are arranged consecutively; or alternatively, the process may be performed,
The n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In one possible design, the sending module is specifically configured to send P random access preambles to the network device through P numerologies; or, transmitting P random access preambles to the network device through P beams.
In one possible design, the first back-off indication is determined by a traffic priority corresponding to the first random access preamble, and the third back-off indication is determined by a traffic priority corresponding to the third random access preamble.
A thirteenth aspect of the present application provides a communications device comprising a processor and a memory for storing a program, the processor invoking the program stored in the memory to perform the method provided in 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 being for storing a program, the processor invoking the program stored in the memory to perform the method provided in the second aspect of the present application.
A fifteenth aspect of the present application provides a communications apparatus comprising a processor and a memory for storing a program, the processor invoking the 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 being for storing a program, the processor invoking the program stored in the memory to perform the method provided in the fourth aspect of the present application.
A seventeenth aspect of the present application provides a communication device comprising a processor and a memory, the memory being for storing a program, the processor invoking the program stored in the memory to perform the method provided in the fifth aspect of the present application.
An eighteenth aspect of the present application provides a terminal, the apparatus comprising a processor and a memory, the memory being for storing a program, the processor invoking the program stored in the memory to perform the method provided in 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 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 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 application provides a communication device comprising at least one processing element (or chip) for performing the method of the above fifth aspect.
A twenty-fourth aspect of the 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 executing the method of the above first aspect.
A twenty-sixth aspect of the present application provides a computer storage medium including the program of the twenty-fifth aspect.
A twenty-seventh aspect of the present application provides a program for executing the method of the above second aspect.
A twenty-eighth aspect of the present application provides a computer storage medium including the program of the twenty-seventh aspect.
A twenty-ninth aspect of the present application provides a program for executing the method of the above third aspect.
A thirty-third 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 executing 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 executing 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 executing 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, comprising:
the first terminal sends a fourth random access preamble to the network device, the fourth random access preamble being determined from 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 a back-off time according to the first back-off parameter and the back-off value;
The first terminal sends a fourth random access preamble to the network device using the back-off time.
In this embodiment, the terminal determines the backoff time according to the backoff parameter and the backoff value of the terminal, and then sends the fourth random access preamble according to the backoff time, so that the probability of different backoff times used between terminals is greatly improved in the scenario of multiple terminals, and interference between terminals in the random access process is avoided.
A thirty-ninth aspect of the present application provides a communications apparatus comprising means for performing the method of the thirty-seventh aspect described above and various implementations of the thirty-seventh aspect.
A fortieth aspect of the present application provides a terminal comprising means for performing the methods provided by the above-described thirty-eighth aspect and various implementations of the thirty-eighth aspect.
A fortieth aspect of the present application provides a communication device comprising a processor and a memory for storing a program, the processor invoking the program stored in the memory to perform the method provided by the thirty-seventh aspect of the present application.
A fortieth aspect of the present application provides a terminal comprising a processor and a memory for storing a program, the processor invoking the program stored in the memory to perform the method provided in the thirty-eighth aspect of the present application.
A fortieth aspect of the present application provides a communication device comprising at least one processing element (or chip) for performing the method of the thirty-seventh aspect above.
A fortieth aspect of the present application provides a terminal comprising at least one processing element (or chip) for performing the method of the thirty-eighth aspect above.
A forty-fifth aspect of the present application provides a program for executing the method of the thirty-seventh aspect above.
A forty-sixth aspect of the present application provides a computer storage medium including the program of the forty-fifth aspect.
A forty-seventh aspect of the present application provides a program for executing the method of the thirty-eighth aspect above.
A forty-eighth aspect of the present application provides a computer storage medium including the program of the forty-seventh aspect.
Drawings
Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application;
fig. 2 is a schematic flow chart 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 application;
fig. 4 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present application;
fig. 6 is a schematic flow chart of a random access method according to another embodiment of the present application;
fig. 7 is a schematic flow chart of a random access method according to another embodiment of the present application;
fig. 8 is a schematic structural diagram of a random access device according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a random access device according to another embodiment of the present application;
fig. 10 is a schematic structural diagram of a random access device according to another embodiment of the present application;
fig. 11 is a schematic structural diagram of a random access device according to another embodiment of the present application;
fig. 12 is a schematic structural diagram of a random access device according to another embodiment of the present application;
fig. 13 is a schematic structural diagram of a random access device according to 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 application;
fig. 15 is a schematic structural diagram of a random access device according to another embodiment of the present application;
fig. 16 is a schematic structural diagram of a random access device according to another embodiment of the present application;
fig. 17 is a schematic structural diagram of a random access device according to another embodiment of the present application.
Detailed Description
The embodiment of the application can be applied to a wireless communication system, and it should be noted that the wireless communication system mentioned in the embodiment of the application includes but is not limited to: narrowband internet of things (Narrow Band-Internet of Things, NB-IoT), global system for mobile communications (Global System for Mobile Communications, GSM), enhanced data rates for GSM evolution (Enhanced Data rate for GSM Evolution, EDGE), wideband code Division multiple access (Wideband Code Division Multiple Access, WCDMA), code Division multiple access 2000 (Code Division Multiple Access, CDMA 2000), time Division synchronous code Division multiple access (Time Division-Synchronization Code Division Multiple Access, TD-SCDMA), long term evolution (Long Term Evolution, LTE) and next generation 5G mobile communication systems.
In an embodiment of the present application, a Terminal (Terminal device) includes, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Terminal), a handset (handset), a portable device (portable equipment), and the like, and the Terminal may communicate with one or more core networks via a radio access network (RAN, radio Access Network), for example, the Terminal may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the like, and the Terminal may also be a portable, pocket, hand-held, computer-built-in, or vehicle-mounted Mobile device or equipment.
Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application.
As shown in fig. 1, a communication system 100 includes a network device 101 and a plurality of terminals 102. When the communication system 01 comprises a core network, the network device 101 may also be connected to the core network. The network device 101 may also be in communication with an internet protocol (Internet Protocol, IP) network 200, such as the internet, a private IP network, or other data network, among others. The network device provides services for terminals within the coverage area. For example, referring to fig. 1, a network device 101 provides wireless access to one or more terminals within the coverage area of the network device 101. In addition, the network devices can also communicate with each other.
The network device 101 may be a device for communicating with a terminal. For example, the base station (Base Transceiver Station, BTS) in the GSM system or the CDMA system, the base station (NodeB, NB) in the WCDMA system, the Evolved Node B (eNB or eNodeB) in the LTE system, or the network-side device in the future 5G network may be used. Or the network device may also be a relay station, an access point, an in-vehicle device, etc. In a terminal-to-Device (D2D) communication system, the network Device may also be a terminal functioning as a base station. The terminals may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), mobile Stations (MS), etc. with wireless communication capabilities.
The method provided by the application is not only suitable for scenes with a small number of terminals, but also suitable for scenes with more terminals, such as mass Internet of things (massive Internet of Thing, mIoT), mass machine type communication (massive Machine Type Communication, mMTC) and the like. Interference collision in the random access procedure between terminals can be avoided as much as possible.
Fig. 2 is a schematic flow chart of a random access method according to an embodiment of the present application, and the method can be applied to the wireless network shown in fig. 1. The wireless network may include one network device and m terminals, and in the following embodiments, a first terminal and a second terminal of the m terminals are described as an example, and the first terminal and the second terminal may be any two terminals of the m terminals.
As shown in fig. 2, the method includes:
s201, a first terminal sends a first random access Preamble (Preamble) to a network device, and a second terminal sends a second random access Preamble to the network device.
Accordingly, the network device receives a first random access Preamble (Preamble) transmitted by the first terminal and a second random access Preamble transmitted by the second terminal.
S202, the network equipment sends response messages to the first terminal and the second terminal. The first terminal and the second terminal receive the response message.
The response message includes: n back-off indications, and n random access preamble identities (Random Access Preamble Identifier, RAPID). 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.
Wherein the first backoff indication corresponds to a first random access preamble and the second backoff indication corresponds to a second random access preamble. n is an integer greater than 1. In one possible design, n is less than or equal to m. m is an integer greater than 0.
In one embodiment, there are 64 random access preambles, which may be numbered 0-63, and the rapid may be an index number of the random access preamble.
After receiving the response message, the terminal stores the backoff indication in the response message, specifically, n backoff indications may be stored, or the terminal may store the backoff indication related to itself, for example, the first terminal may store the first backoff indication corresponding to the first random access preamble. When the terminal transmits the random access preamble next time, the terminal determines a back-off value by adopting the stored back-off instruction, and then randomly selects a value between 0 and the back-off value as back-off time, and transmits the random access preamble after delaying the back-off time.
Specifically, the response message may include n random access preamble identifiers, that is, the random access preamble identifiers may correspond to n backoff indicators one to one. The backoff indication obtained by the plurality of terminals may be different, and the probability of the backoff time being different in the next transmission of the random access preamble is greater, so that the probability of mutual interference between the terminals is greatly reduced.
Optionally, the response message may further include n medium access control (Media Access Control, MAC) random access responses (random access response, RAR), where the n random access preambles may also correspond to the n MAC RARs one-to-one. The MAC RAR may be configured to reply to the corresponding random access preamble, and may specifically include: a time advance command field (Timing Advance Command), an uplink Grant (UL Grant), a temporary (cell radio network temporary identity, C-RNTI), etc. The uplink grant indicates that the terminal is used for uplink transmission of the resource of the information 3 (MSG 3), including parameters such as time-frequency position, frequency hopping, power control, etc.
In this embodiment, the network device receives a first random access preamble sent by the first terminal and a second random access preamble sent by the second terminal, and further sends response messages to the first terminal and the second terminal, where multiple backoff instructions are carried in one response message, and the multiple terminals may receive the response message and determine corresponding backoff instructions according to the random access preamble sent by the network device. The probability that a plurality of terminals obtain different backoff instructions is increased, and further the probability that the backoff time is different when the terminals send random access preambles next time is larger, so that the probability of mutual interference between the terminals is greatly reduced.
Optionally, the backoff indication is a backoff value or a backoff parameter.
In one embodiment, the response message directly carries n backoff values, and since different random access preambles may correspond to different backoff values, after receiving the response message, the terminal may identify the random access preamble that has been sent by itself, and further may acquire its backoff value and store the backoff value. A value is selected from 0 to a back-off value as a back-off time next time when the random access preamble is transmitted.
In another embodiment, the network device may send a default backoff value to the terminal in advance via other messages. The default back-off value is sent to the terminal, for example, by RRC signaling or a system broadcast message, etc.
The response message carries n backoff parameters. The terminal can directly obtain its own back-off parameter according to the mapping relation between the random access preamble and the back-off parameter, and store the back-off parameter. When the random access preamble is transmitted next time, the back-off time of the random access preamble is determined according to the back-off 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, such as 0, or a preset value, which is not limited herein.
Optionally, the backoff parameter is any of the following: back-off coefficient, back-off offset value, back-off interval index.
After obtaining the backoff coefficient, the terminal multiplies the default backoff value by the backoff coefficient when transmitting the random access preamble next time, and the obtained result is used as the backoff time. The value range of the back-off coefficient may be [0,1], but is not limited thereto.
After obtaining the backoff offset value, the terminal adds or subtracts the backoff offset value to or from a default backoff value when transmitting the random access preamble next time, and the obtained result is used as a backoff time. The range of the backoff offset value may be [ -L, L ], L being an integer greater than 0.
The result obtained by adding or subtracting the backoff offset value to or from the default backoff value is directly used as the backoff time if the result is greater than or equal to 0, and if the result is less than 0, 0 is used as the backoff time.
When the backoff indication is a backoff interval index, each backoff interval index corresponds to a value interval, as shown in table 1. When the terminal sends the random access preamble next time, a value interval is obtained according to the corresponding back-off interval index, and a value is randomly determined in the value interval to be used as the back-off time. The probability that the back-off time determined by a plurality of terminals is the same is greatly reduced because the value intervals corresponding to different back-off interval indexes are different.
TABLE 1
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For example, the terminal obtains the value interval "60-70" when transmitting the random access preamble next time in the value interval "60-70" corresponding to the back-off interval index "5", and randomly determines a value in the value interval "60-70" as the back-off time.
Alternatively, in one embodiment, the terminal may support multiple antennas, or include multiple beams (beams) on one antenna, and then the terminal may initiate multiple random accesses through different beams or antennas, i.e., may send multiple random access preambles to the network device. It is also possible that the terminal supports multiple parameter information, and the parameter information may be numerology, and then the terminal may send multiple random access preambles to the network device using different numerologies.
In this embodiment, the plurality of random access preambles transmitted by the terminal may be different, and the network device may configure different backoff indicators according to the different random access preambles.
Taking the first terminal as an example, the network device may receive the first random access preambles sent by the first terminal, where the network device may receive P random access preambles sent by the first terminal. The P random access preambles include: and P is an integer greater than 1.
The response message sent by the network device has a first backoff indication corresponding to the first random access preamble and also has a third backoff indication corresponding to the third random access preamble. I.e. the n backoff indications further comprise: and a third backoff instruction corresponding to the third random access preamble.
Specifically, the physical characteristics or service types corresponding to different antennas/beams/numerologies are different, wherein the physical characteristics may include at least one of the following: supported resource types, subcarrier spacing, transmission time interval (transmission time interval, TTI), cyclic Prefix (CP), etc. The traffic types may include: enhanced mobile bandwidth (Enhanced Mobile Broadband, emmbb), very high reliability very Low latency scenarios (URLLC), machine-type communications (machine type communication, MTC), and the like.
The network device may determine the backoff indication based on the antenna/beam/numerology receiving the random access preamble. For example, when the network device receives the random access preamble sent by the first terminal by adopting a plurality of numerologies, and the priorities of the services corresponding to the plurality of numerologies are different, the network device determines the backoff indication, considering that the service backoff time with high priority is shorter and the service backoff time with low priority can be longer, respectively determining the backoff indication. Therefore, when the terminal sends the random access preamble by adopting the plurality of numerologies next time, the probability of interference can be reduced because the back-off time determined according to the back-off instruction is different.
In this embodiment, the first backoff indication is determined by the traffic priority corresponding to the first random access preamble. The third backoff indication is determined by a traffic priority corresponding to the third random access preamble.
When the terminal sends P random access preambles next time, the terminal determines the back-off time according to the back-off indication corresponding to each previous random access preamble, so that the sending time of the P random access preambles may be different, and interference among the plurality of random access preambles is avoided as much as possible.
Optionally, there may be a correspondence between the random access preamble and the antenna/beam/numerology, and after receiving the response message, the terminal may determine "antenna/beam/numerology" corresponding to each backoff instruction in the n backoff instructions according to the random access preamble identifier in the response message.
Alternatively, each back-off indication may correspond to each antenna/beam/numerology. As in the previous embodiments, the physical characteristics or traffic types corresponding to different antennas/beams/numerologies are different.
For example: the first backoff indication is obtained from the response message for the first random access preamble transmitted by the first terminal on the first beam the previous time. The next time the first terminal transmits a random access preamble on the first beam, determining a first back-off time according to the first back-off instruction, and transmitting the random access preamble on the first beam after delaying the first back-off time.
Similarly, the first terminal acquires the first backoff indication from the response message using the first random access preamble transmitted by the first numerology the previous time. And when the first terminal adopts the first numerology to send the random access preamble next time, determining a first back-off time according to the first back-off instruction, and sending the random access preamble on the first numerology after delaying the first back-off time.
Fig. 3 is a schematic structural diagram of a response message in a random access method according to an embodiment of the present application, where, as shown in fig. 3, n backoff indicators in the response message are arranged continuously and n random access preamble identifiers are arranged continuously.
Specifically, referring to fig. 3, n backoff indicators (denoted BI, backoff Indicator) and n RAPID are located at a MAC header (header). The first n boxes include n BIs (noted as BI 1-BIn), respectively, and each box further includes: an extended field (E), a type field (T), and a reserved bit (R), the extended field "E" being used to indicate that the MAC header also includes other fields, e.g., E occupies 1 bit (bit), and when the value of "E" is 1, indicates that there are other fields, e.g., indicates that there are fields containing RAPID; when the value of "E" is 0, this indicates that MAC RAR, padding, and the like follow. The type field "T" is used to indicate whether RAPID or BI is contained within this box, e.g., T is set to "0" indicating that BI value is contained, and if "1" indicates that RAPID is contained.
n BI are followed by n subheaders containing RAPID, and each subheader contains an extension field (E) and a type field (T), which are the same as the above, and are not repeated. Where the value of "E" is 1, it means that there are other fields, for example, fields containing BI.
The MAC header may also be followed by n MAC RARs and padding bits (padding) that may be present 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 application, where, as shown in fig. 4, n backoff indicators in the response message are arranged continuously and n random access preamble identifiers are arranged continuously.
Referring to fig. 4, the structure shown in fig. 3 is different in that n random access preamble ids precede n backoff indicators, i.e., consecutive n backoff indicators and consecutive n random access preambles may exchange order.
The specific content is the same as that of fig. 3, and will not be described again.
"E-T-R-R-BI 1" in FIGS. 3 and 4 may mean "E", "T", "R" each occupy 1bit, and "BI" occupies 4 bits. "E-T-RAPID" may mean "E", "T" each occupy 1bit, 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 application, as shown in fig. 5, n backoff indicators and n random access preamble identifiers are arranged at intervals in the response message, where one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
In this way, the indication of the extension domain (E) is not needed, and resources can be saved. The specific parameters may refer to the descriptions of fig. 3 and fig. 4, and are not described herein.
Specifically, as shown in fig. 5, a BI may be followed by a RAPID, which may also be followed by a corresponding MAC RAR. However, the order of BI and RAPID may also be exchanged, for example, one RAPID followed by a corresponding BI followed by a corresponding MAC RAR.
Wherein the boxes containing BI also contain "T" and "R", and similarly, the boxes containing RAPID may also contain "T" and "R".
The response message may be a protocol data unit (protocol data unit, PDU), but is not limited thereto. The response message may be carried in information 2 (MSG 2).
Fig. 6 is a schematic flow chart of a random access method according to another embodiment of the present application, as shown in fig. 6, the method includes:
s601, the network equipment determines first configuration information.
Wherein the first configuration information includes: a first backoff parameter.
Optionally, the network device sends the first configuration information to the first terminal through RRC signaling or a system broadcast message.
Specifically, when the system broadcasts the message, a list may be sent, where the list includes a plurality of configuration information, and each configuration information corresponds to a different terminal or a different random access preamble, which is not limited herein.
S602, the network equipment sends first configuration information to the first terminal.
S603, after receiving the first configuration information, the first terminal stores a first back-off parameter indicated in the first configuration information.
When the first terminal performs random access next time, determining a back-off time according to the first back-off parameter, and sending out a random access preamble after delaying the back-off time.
In this embodiment, the network device determines the backoff parameters for each terminal in the network, and sends the backoff parameters to the corresponding terminal through the configuration information, so that the backoff parameters obtained by the plurality of terminals are different as much as possible, and further the probability that the backoff time is different when the terminal sends the random access preamble next time is greater, and then the probability of mutual interference between the terminals is greatly reduced.
Alternatively, the first backoff parameter may be any of the following: back-off coefficient, back-off offset value, back-off interval index.
In one embodiment, the first backoff parameter may be a first backoff value, that is, the network device allocates different backoff values to each terminal, so that the probability that a plurality of terminals in the network determine different backoff times according to the different backoff values increases, and the probability that interference occurs between the terminals is greatly reduced.
In yet another embodiment, the method further comprises: the network device receives a first random access preamble sent by a first terminal. The network device sends a response message to the first terminal, the response message including the backoff value.
The embodiment is similar to the embodiment shown in fig. 2, and the network device may uniformly reply to the response message to the plurality of terminals. The terminal stores the back-off value after receiving the back-off value, and determines the back-off time by using the back-off value and the corresponding back-off parameter before transmitting the random access preamble next time. For example, the first terminal determines a back-off time from the first back-off parameter and this back-off value before the next transmission of the random access preamble.
Taking the next transmission of a fourth random access preamble as an example, the fourth random access preamble may be the same as or different from the previously transmitted random access preamble, and the present application is not limited. And the first terminal determines the back-off time according to the first back-off parameter and the back-off value, and further the first terminal adopts the back-off time to send a fourth random access preamble to the network equipment. Specifically, the first terminal delays the back-off time to transmit the fourth random access preamble after determining to transmit the fourth random access preamble.
When the first backoff parameter is a backoff coefficient, the backoff coefficient is multiplied by the backoff value at the next time of transmitting the random access preamble, and the result is obtained as a backoff time. The value range of the back-off coefficient may be [0,1], but is not limited thereto.
When the first backoff parameter is a backoff offset value, the backoff offset value is added or subtracted to the next time the random access preamble is transmitted, and the result is obtained as a backoff time. The range of the backoff offset value may be [ -L, L ], L being an integer greater than 0. The result obtained by adding or subtracting the backoff offset value to or from the backoff value is directly used as the backoff time if the result is greater than or equal to 0, and if the result is less than 0, 0 is used as the backoff time.
When the first backoff parameter is a backoff interval index, each backoff interval index corresponds to a value interval, as shown in table 1. When the terminal sends the random access preamble next time, a value interval is obtained according to the corresponding back-off interval index, and a value is randomly determined in the value interval to be used as the back-off time. The probability that the back-off time determined by a plurality of terminals is the same is greatly reduced because the value intervals corresponding to different back-off interval indexes are different.
In this embodiment, the network device may further determine second configuration information, and send the second configuration information to the second terminal, where the configuration information includes a second backoff parameter.
The second backoff parameter may be different from the first backoff parameter, i.e., the network device configures the plurality of terminals in the network with different backoff parameters.
Similarly, the second backoff parameter comprises any of the following: back-off coefficient, back-off offset value, back-off 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 will not be described again here.
The network device transmits the second configuration information to the second terminal through RRC signaling or a system broadcast message.
In another embodiment, the network device receives a first random access preamble sent by a first terminal, which may be: the network equipment receives P random access preambles sent by the first terminal, wherein the P random access preambles comprise: and P is an integer greater than 1.
As in the previous embodiments, the terminal may support multiple antennas or may support multiple beams (beams) on one antenna, and then the terminal may initiate multiple random accesses through different beams or antennas, i.e., may send multiple random access preambles to the network device. It may also be that the terminal supports multiple numerologies, and then the terminal may send multiple random access preambles to the network device on the numerologies.
That is, the first terminal may send P random access preambles to the network device: 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 through P beams.
The service priorities corresponding to the plurality of random access preambles transmitted by the same terminal may be different, and the network device may determine the backoff parameters corresponding to the random access preambles according to the service priorities corresponding to the random access preambles. The first configuration information sent by the network device may include a plurality of backoff parameters, where each backoff parameter corresponds to a different random access preamble.
Correspondingly, the first configuration information further includes: and a third backoff parameter. The first back-off parameter corresponds to a first random access preamble and the third back-off parameter corresponds to a third random access preamble. Wherein the first backoff indication is determined by a traffic priority corresponding to the first random access preamble. The third backoff indication is determined by a traffic priority corresponding to the third random access preamble.
When the terminal sends P random access preambles next time, the terminal determines the back-off time according to the back-off parameter corresponding to each previous random access preamble, so that the sending time of the P random access preambles may be different, and interference among the plurality of random access preambles is avoided as much as possible.
Alternatively, each back-off parameter may correspond to each antenna/beam/numerology. As in the previous embodiments, the physical characteristics or traffic types corresponding to different antennas/beams/numerologies are different. The terminal may determine a mapping relationship between the backoff parameters and the antenna/beam/numerology in advance, and use the corresponding backoff parameters when different "antenna/beam/numerology" issues the random access preamble.
For example: when the first terminal transmits the random access preamble on the first beam, the first back-off time is determined according to the first back-off parameter and the back-off value, and the random access preamble is transmitted on the first beam after delaying the first back-off time.
Similarly, when the first terminal adopts the first random access preamble sent by the first numerology, the first back-off time is determined according to the first back-off parameter and the back-off value, and after the first back-off time is delayed, the random access preamble is sent by the first numerology.
Fig. 7 is a schematic flow chart of a random access method according to another embodiment of the present application, as shown in fig. 7, the method includes:
s701, the first terminal sends P random access preambles to the network device.
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 first terminal may be any terminal in the network, and is not limited herein. In this embodiment, one terminal may transmit a plurality of random access preambles to the network device.
S702, the network equipment sends a response message to the first terminal.
Wherein the response message includes: n back-off indications and n random access preamble identifications, the n back-off indications including a first back-off indication and a third back-off indication. The n random access preamble identifiers comprise a first random access preamble identifier and a third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
S703, the first terminal stores n backoff instructions.
Similar to the foregoing embodiment, the terminal determines the backoff time according to the backoff indication corresponding to each previous random access preamble when transmitting P random access preambles next time, so that the transmission times of the P random access preambles may be different, and interference between the plurality of random access preambles is avoided as much as possible.
It should be noted that, if there are multiple terminals in the network, the processing manner of each terminal is the same as that of the first terminal, and no example is given.
In this embodiment, the terminal sends a plurality of random access preambles to the network device, and the network device feeds back a response message to the terminal, where the response message includes: the n backoff instructions and the n random access preamble identifiers are in one-to-one correspondence, so that when the terminal transmits a plurality of random access preambles next time, the backoff time is determined according to the backoff instruction corresponding to each random access preamble before, and therefore, the transmission time of the plurality of random access preambles may be different, and interference among the plurality of random access preambles is avoided as much as possible.
Optionally, the backoff indication is a backoff value or a backoff parameter, and the backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
In one embodiment, the response message directly carries 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 a back-off value as a back-off time next time when the random access preamble is transmitted.
In another embodiment, the network device may send a default backoff value to the terminal in advance via other messages. The response message carries n backoff parameters. The terminal can obtain the backoff parameters corresponding to each random access preamble and store the backoff parameters according to the mapping relation between the random access preamble and the backoff parameters. When random access preambles are transmitted next time, the back-off time of each random access preamble is determined according to the back-off parameters.
When the backoff parameter is a backoff coefficient, the backoff coefficient is multiplied by the backoff value at the next time of transmitting the random access preamble, and the result is obtained as a backoff time. The value range of the back-off coefficient may be [0,1], but is not limited thereto.
When the backoff parameter is a backoff offset value, the backoff offset value is added or subtracted to the backoff value at the next time of transmitting the random access preamble, and the result is obtained as a backoff time. The range of the backoff offset value may be [ -L, L ], L being an integer greater than 0. The result obtained by adding or subtracting the backoff offset value to or from the backoff value is directly used as the backoff time if the result is greater than or equal to 0, and if the result is less than 0, 0 is used as the backoff time.
When the back-off parameter is a back-off interval index, each back-off interval index corresponds to a value interval, as shown in table 1. When the terminal sends the random access preamble next time, a value interval is obtained according to the corresponding back-off interval index, and a value is randomly determined in the value interval to be used as the back-off time. The probability that the back-off time determined by a plurality of terminals is the same is greatly reduced because the value intervals corresponding to different back-off interval indexes are different.
It should be noted that, the terminal may support multiple antennas or support multiple beams (beams) on one antenna, and then the terminal may initiate multiple random accesses through different beams or antennas, that is, may send multiple random access preambles to the network device. It may also be that the terminal supports multiple numerologies, and then the terminal may send multiple random access preambles to the network device using different numerologies.
Optionally, the network device receives P random access preambles sent by the first terminal, which may be: the network equipment receives P random access preambles sent by the first terminal through P numerologies; or alternatively, the process may be performed,
the network device receives P random access preambles transmitted by the first terminal through P beams.
In this embodiment, the plurality of random access preambles transmitted by the first terminal may all be different, and the network device may configure different backoff indicators according to the different random access preambles.
In one embodiment, before the network device sends the response message to the first terminal, the method further includes: the network device determines a first back-off indication according to the service priority corresponding to the first random access preamble, and determines a third back-off indication according to the service priority corresponding to the third random access preamble.
There may be a correspondence between the random access preamble and the antenna/beam/numerology, and after receiving the response message, the terminal may determine "antenna/beam/numerology" corresponding to each backoff instruction in the n backoff instructions according to the random access preamble identifier in the response message.
Alternatively, each back-off indication may correspond to each antenna/beam/numerology. As in the previous embodiments, the physical characteristics or traffic types corresponding to different antennas/beams/numerologies are different.
For example: the first backoff indication is obtained from the response message for the first random access preamble transmitted by the first terminal on the first beam the previous time. The next time the first terminal transmits a random access preamble on the first beam, determining a first back-off time according to the first back-off instruction, and transmitting the random access preamble on the first beam after delaying the first back-off time.
Similarly, the first terminal uses the first numerology to send the first random access preamble the previous time, and obtains the first backoff indication from the response message. And when the first terminal adopts the first numerology to send the random access preamble next time, determining a first back-off time according to the first back-off instruction, and adopting the first numerology to send the random access preamble after delaying the first back-off time.
Optionally, n backoff instructions in the response message are arranged continuously and n random access preamble identifiers are arranged continuously; or n back-off instructions and n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n back-off instructions is adjacent to one of the n random access preamble identifiers.
The response message may be a protocol data unit (protocol data unit, PDU), but is not limited thereto. The response message may be carried in information 2 (MSG 2).
Fig. 3 to fig. 5 may be specifically referred to, where fig. 3 and fig. 4 show two ways of consecutively arranging n backoff instructions and consecutively arranging n random access preambles. Fig. 5 shows that n backoff indicators and n random access preamble identifiers are arranged at intervals in the response message, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers. And will not be described in detail herein.
On the basis of the above embodiment, after each time the terminal sends the random access PREAMBLE, it monitors whether a response message is received in a monitoring window (preset time period), if not, adds 1 to a monitoring variable (preamble_transmission_counter), and determines whether the value of the monitoring variable reaches a preset threshold, if the value reaches the preset threshold, reports the random access failure to the upper layer, if the value does not reach the preset threshold, determines a back-off time, and after the back-off time, initiates a random access procedure again, that is, sends the random access PREAMBLE again to the network device, where 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 embodiments mainly involves the terminal determining the back-off time according to the back-off value, in order to achieve that the back-off times determined by the plurality of terminals in the network are as different as possible.
Fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the device may be integrated in the network apparatus. As shown in fig. 8, the apparatus includes: a processing module 801 and a transmitting module 802, wherein:
a processing module 801 is configured to determine first configuration information.
A sending module 802, configured to send the first configuration information to a first terminal, where the first configuration information includes: a first backoff parameter.
Further, the first backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
Fig. 9 is a schematic structural diagram of a communication device according to another embodiment of the present application, as shown in fig. 9, where on the basis of fig. 8, the device may further include: a receiving module 901, configured to receive a first random access preamble sent by the first terminal.
Correspondingly, the sending module 802 is further configured to send a response message to the first terminal, where the response message includes: a backoff value.
In an embodiment, the receiving module 901 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.
Optionally, in another embodiment, 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: and P is an integer greater than 1.
Optionally, the first configuration information further includes: and a third backoff parameter.
Wherein a first back-off parameter corresponds to the first random access preamble and a third back-off parameter corresponds to the third random access preamble.
In one embodiment, the sending module 802 is specifically configured to send the first configuration information to the first terminal through radio resource control RRC signaling or a system broadcast message.
Further, the 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 a second terminal, where the second configuration information includes: and a second backoff parameter.
Optionally, the second backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
Correspondingly, the sending module 802 is specifically configured to send the second configuration information to the second terminal through a radio resource control RRC signaling or a system broadcast message.
Fig. 10 is a schematic diagram of a terminal structure according to another embodiment of the present application. As shown in fig. 10, the apparatus includes: a receiving module 110 and a storage module 111, wherein:
a receiving module 110, configured to receive first configuration information sent by a network device, where the first configuration information includes: a first backoff parameter.
A storage module 111, configured to store the first backoff parameter.
Optionally, the first backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
Fig. 11 is a schematic structural diagram of a terminal according to another embodiment of the present application, as shown in fig. 11, on the basis of fig. 10, the terminal further includes: a transmitting module 112.
The sending module 112 is further configured to send a first random access preamble to the network device.
Correspondingly, 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 specifically configured to send P random access preambles to the network device, where the P random access preambles include: and P is an integer greater than 1.
Optionally, the first configuration information further includes: and a third backoff parameter.
The first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
Referring to fig. 11, the terminal may further comprise a processing module 113 for determining a back-off time based on said first back-off parameter and said back-off value. Correspondingly, the sending module 112 is further configured to send a fourth random access preamble to the network device using the back-off time.
Fig. 12 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application, where the apparatus may be integrated in a network device, as shown in fig. 12, and the apparatus includes: a receiving module 120 and a transmitting module 121, wherein:
the receiving module 120 is configured to receive a first random access preamble sent by a first terminal and a second random access preamble sent by a second terminal.
And a sending module 121, configured to send response messages to the first terminal and the second terminal.
Wherein the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a second back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the second random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the second back-off indication corresponds to the second random access preamble, and n is an integer greater than 1.
Optionally, the backoff indication is a backoff value or a backoff parameter, and the backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
The receiving module 120 is specifically configured to receive P random access preambles sent by the first terminal, where the P random access preambles include: and P is an integer greater than 1.
Optionally, the n backoff instructions further comprise: and a third backoff indication, the third backoff indication corresponding to the third random access preamble.
Optionally, n backoff instructions in the response message are arranged continuously and n random access preamble identifiers are arranged continuously; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
Fig. 13 is a schematic structural diagram of a terminal according to still another embodiment of the present application, as shown in fig. 13, the terminal includes: a transmitting module 131 and a receiving module 132, wherein:
a sending module 131, configured to send the first random access preamble to a network device.
A receiving module 132, configured to receive a response message sent by the network device, where the response message includes: the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a second back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the second random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the second back-off indication corresponds to the second random access preamble, and n is an integer greater than 1.
Optionally, the backoff indication is a backoff value or a backoff parameter, and the backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
Further, the sending module 131 is specifically configured to send P random access preambles to the network device, where the P random access preambles include: and P is an integer greater than 1.
Optionally, the n backoff instructions further comprise: and a third backoff indication, the third backoff indication corresponding to the third random access preamble.
Optionally, n backoff instructions in the response message are arranged continuously and n random access preamble identifiers are arranged continuously; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
Fig. 14 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application, where the apparatus may be integrated in a network device, as shown in fig. 14, and the apparatus includes: a receiving module 141 and a transmitting module 142, wherein:
A receiving module 141, 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, P is an integer greater than 1.
A sending module 142, configured to send a response message to the first terminal, where the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a third back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
Optionally, the backoff indication is a backoff value or a backoff parameter, and the backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
Optionally, n backoff instructions in the response message are arranged continuously and n random access preamble identifiers are arranged continuously; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
Optionally, a receiving module 141 is specifically configured to receive P random access preambles sent by the first terminal through P parameter information (numerology); or, receiving P random access preambles sent by the first terminal through P beams.
Fig. 15 is a schematic structural diagram of a communication device according to another embodiment of the present application, as shown in fig. 15, on the basis of fig. 14, the device further includes: the processing module 151 is configured to determine the first backoff indication according to the service priority corresponding to the first random access preamble, and determine the third backoff indication according to the service priority corresponding to the third random access preamble.
Fig. 16 is a schematic view of a terminal structure according to another embodiment of the present application, as shown in fig. 16, where the apparatus includes: a transmitting module 161 and a receiving module 162, wherein:
a sending module 161, configured to send P random access preambles to a network device, where the P random access preambles include: and P is an integer greater than 1.
A receiving module 162, configured to receive a response message sent by the network device, where the response message includes: n back-off indications and n random access preamble identifiers, wherein the n back-off indications comprise a first back-off indication and a third back-off indication, the n random access preamble identifiers comprise the first random access preamble identifier and the third random access preamble identifier, the first back-off indication corresponds to the first random access preamble, the third back-off indication corresponds to the third random access preamble, and n is an integer greater than 1.
Optionally, the backoff indication is a backoff value or a backoff parameter, and the backoff parameter is any one of the following: back-off coefficient, back-off offset value, back-off interval index.
Optionally, n backoff instructions in the response message are arranged continuously and n random access preamble identifiers are arranged continuously; or alternatively, the process may be performed,
the n backoff indicators and the n random access preamble identifiers in the response message are arranged at intervals, wherein one of the n backoff indicators is adjacent to one of the n random access preamble identifiers.
Further, the foregoing sending module 161 is specifically configured to send P random access preambles to the network device through P numerologies; or, transmitting P random access preambles to the network device through P beams.
Optionally, the first backoff indication is determined by a traffic priority corresponding to the first random access preamble, and the third backoff indication is determined by a traffic priority corresponding to the third random access preamble.
The above device may be used to execute the method provided by the above method embodiment, and the specific implementation manner and technical effects are similar, and are not repeated here.
It should be noted that, it should be understood that the division of the modules of the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules. For example, the processing module may be a processing element that is set up separately, may be implemented in a chip of the above-mentioned apparatus, or may be stored in a memory of the above-mentioned apparatus in the form of program codes, and the functions of the above-mentioned processing module may be called and executed by a processing element of the above-mentioned apparatus. The implementation of the other modules is similar. In addition, all or part of the modules can be integrated together or can be independently implemented. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in a software form.
For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), or the like. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Fig. 17 is a schematic structural diagram of a random access apparatus according to another embodiment of the present application, where the apparatus may be integrated in the foregoing network device or terminal, as shown in fig. 17, and the apparatus includes: a memory 10 and a processor 11.
The memory 10 may be a separate physical unit and may be connected to the processor 11 via a bus. The memory 10 and the processor 11 may be integrated, realized by hardware, or the like.
The memory 10 is used to store a program implementing the above method embodiment, or the respective modules of the embodiments shown in fig. 8 to 16, and the processor 11 invokes the program to perform the operations of the above method embodiment.
For example, in one embodiment, the processor 11 determines the first configuration information; the first configuration information is sent to a first terminal, wherein the first configuration information comprises: a first backoff parameter.
Accordingly, in another embodiment, the processor 11 receives first configuration information sent by the network device, where the first configuration information includes: a first backoff parameter; and storing the first back-off parameter.
Alternatively, when part or all of the random access methods of the above embodiments are implemented by software, the random access apparatus may include only the processor. The memory for storing the program is located outside the random access device, and the processor is connected with the memory through a circuit/wire for reading and executing the program stored in the memory.
The processor may be a central processor (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP.
The processor may further comprise a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), general-purpose array logic (generic array logic, GAL), or any combination thereof.
The memory may include volatile memory (RAM), such as random-access memory (RAM); the memory may also include a nonvolatile memory (non-volatile memory), such as a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); the memory may also comprise a combination of the above types of memories.
The embodiment of the application also provides a computer storage medium which stores a computer program for executing the random access method provided by the embodiment.
The embodiment of the application also provides a computer program product containing instructions, which when run on a computer, cause the computer to execute the random access method provided by the embodiment.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims (32)

1. A random access method, comprising:
the network equipment distributes different configuration information for a plurality of terminal equipment, and the backoff parameters in the configuration information corresponding to each terminal are different;
the network equipment determines first configuration information corresponding to a first terminal;
the network device sends the first configuration information to a first terminal, wherein the first configuration information comprises: a first backoff parameter.
2. The method of claim 1, wherein the first backoff parameter is any one of: back-off coefficient, back-off offset value, back-off interval index.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
the network equipment receives a first random access preamble sent by the first terminal;
The network device sends a response message to the first terminal, wherein the response message comprises: a backoff value.
4. A method according to claim 3, wherein the network device receiving the first random access preamble transmitted by the first terminal comprises:
the network device receives P random access preambles sent by the first terminal, where the P random access preambles include: and P is an integer greater than 1.
5. The method of claim 4, wherein the first configuration information further comprises: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
6. The method of claim 1, wherein the network device sending the first configuration information to the first terminal comprises:
the network device sends the first configuration information to the first terminal through Radio Resource Control (RRC) signaling or system broadcast messages.
7. A method according to claim 3, characterized in that the method further comprises:
The network device receives a fourth random access preamble sent by the first terminal, wherein the fourth random access preamble is determined according to the back-off value and the first back-off parameter.
8. A random access method, comprising:
the method comprises the steps that a first terminal receives first configuration information sent by network equipment, wherein the first configuration information comprises the following steps: the first back-off parameters are the configuration information corresponding to the first terminal, which is determined by the network equipment in a plurality of configuration information, wherein the plurality of configuration information is distributed to a plurality of terminals by the network equipment, and the back-off parameters in the configuration information corresponding to each terminal are different;
the first terminal stores the first backoff parameter.
9. The method of claim 8, wherein the first backoff parameter is any one of: back-off coefficient, back-off offset value, back-off interval index.
10. The method according to claim 8 or 9, characterized in that the method further comprises:
the first terminal sends a first random access preamble to the network equipment;
the first terminal receives a response message sent by the network device, wherein the response message comprises: a backoff value.
11. The method of claim 10, wherein the first terminal transmitting a first random access preamble to the network device comprises:
the first terminal sends P random access preambles to the network device, wherein the P random access preambles comprise: and P is an integer greater than 1.
12. The method of claim 11, wherein the first configuration information further comprises: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
13. The method according to claim 10, wherein the method further comprises:
the first terminal determines a back-off time according to the first back-off parameter and the back-off value;
and the first terminal sends a fourth random access preamble to the network equipment by adopting the back-off time.
14. A communication apparatus, the communication apparatus being a network device, comprising:
the processing module is used for distributing different configuration information to a plurality of terminal devices by the network device, and the back-off parameters in the configuration information corresponding to each terminal are different;
The processing module is further used for determining first configuration information corresponding to the first terminal equipment;
the sending module is configured to send the first configuration information to a first terminal, where the first configuration information includes: a first backoff parameter.
15. The apparatus of claim 14, wherein the first backoff parameter is any one of: back-off coefficient, back-off offset value, back-off interval index.
16. The apparatus according to claim 14 or 15, further comprising: a receiving module;
the receiving module is used for receiving a first random access preamble sent by the first terminal;
the sending module is configured to send a response message to the first terminal, where the response message includes: a backoff value.
17. The apparatus according to claim 16, wherein the receiving module is configured to receive P random access preambles transmitted by the first terminal, the P random access preambles comprising: and P is an integer greater than 1.
18. The apparatus of claim 17, wherein the first configuration information further comprises: a third backoff parameter;
The first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
19. The apparatus according to claim 14, wherein the sending module is configured to send the first configuration information to the first terminal through radio resource control, RRC, signaling or a system broadcast message.
20. The apparatus according to claim 16, wherein the receiving module is configured to receive a fourth random access preamble sent by the first terminal according to the back-off value and the first back-off parameter.
21. A communication apparatus, the communication apparatus being a terminal, comprising:
the receiving module is configured to receive first configuration information sent by a network device, where the first configuration information includes: the first back-off parameters are the configuration information corresponding to the first terminal, which is determined by the network equipment in a plurality of configuration information, wherein the plurality of configuration information is distributed to a plurality of terminals by the network equipment, and the back-off parameters in the configuration information corresponding to each terminal are different;
and the storage module is used for storing the first back-off parameter.
22. The apparatus of claim 21, wherein the first backoff parameter is any of: back-off coefficient, back-off offset value, back-off interval index.
23. The apparatus according to claim 21 or 22, further comprising: a transmitting module;
the sending module is used for sending a first random access preamble to the network equipment;
the receiving module is further configured to receive a response message sent by the network device, where the response message includes: a backoff value.
24. The apparatus according to claim 23, wherein the transmitting module is configured to specifically transmit P random access preambles to the network device, the P random access preambles comprising: and P is an integer greater than 1.
25. The apparatus of claim 24, wherein the first configuration information further comprises: a third backoff parameter;
the first back-off parameter corresponds to the first random access preamble, and the third back-off parameter corresponds to the third random access preamble.
26. The apparatus as recited in claim 23, further comprising:
A processing module, configured to determine a back-off time according to the first back-off parameter and the back-off value;
the sending module is further configured to send a fourth random access preamble to the network device using the back-off time.
27. A communication device comprising a processor and a memory for storing a program, the processor invoking the program stored in the memory to perform the method of any of claims 1-7.
28. A communication device comprising a processor and a memory for storing a program, the processor invoking the program stored in the memory to perform the method of any of claims 8-13.
29. A communication device comprising at least one processing element or chip for performing the method of any of claims 1-7.
30. A communication device comprising at least one processing element or chip for performing the method of any of claims 8-13.
31. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program or instructions which, when executed by an apparatus, implement the method of any of claims 1-7.
32. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program or instructions which, when executed by an apparatus, implement the method of any of claims 8-13.
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