CN114040516A - Information analysis method, transmission method, device, electronic device and storage medium - Google Patents

Information analysis method, transmission method, device, electronic device and storage medium Download PDF

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Publication number
CN114040516A
CN114040516A CN202111442833.XA CN202111442833A CN114040516A CN 114040516 A CN114040516 A CN 114040516A CN 202111442833 A CN202111442833 A CN 202111442833A CN 114040516 A CN114040516 A CN 114040516A
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mac
target indication
subheader
pdu
sub
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不公告发明人
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Shanghai Xingsi Semiconductor Co ltd
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Shanghai Xingsi Semiconductor Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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

Abstract

The application provides an information analysis method, an information transmission method, an information analysis device, an electronic device and a storage medium, and relates to the technical field of communication. The analysis method analyzes the target indication domain in the MAC sub-header of the MAC PDU by receiving the MAC PDU corresponding to the random access response so as to determine whether the MAC sub-header of the target indication domain has the corresponding MAC RAR, thus the terminal does not need to judge whether the MAC RAR corresponding to the MAC sub-header exists according to the comparison between the RAPID in the MAC PDU and the SI preamble index list configured by the RRC, but can judge whether the corresponding MAC RAR exists by analyzing the target indication domain, thereby reducing the complexity of terminal analysis, improving the analysis efficiency of the terminal and reducing the possible spread range when the terminal analyzes the error.

Description

Information analysis method, transmission method, device, electronic device and storage medium
Technical Field
The present application relates to the field of communications technologies, and in particular, to an information analysis method, a transmission method, an apparatus, an electronic device, and a storage medium.
Background
In a New Radio (NR) system, a terminal needs to establish a connection with a network, and this process is generally called a Random Access (RA) process. Through random access, the terminal device may establish uplink synchronization with the network and obtain a unique cell-Radio network temporary identifier (C-RNTI). The final purpose of random access is to establish synchronization, and only when uplink synchronization is obtained, the terminal device can perform uplink transmission.
In the Random Access process of the terminal, the base station may send a Random Access Response message to the terminal through a Medium Access Control (MAC) layer, where the message may carry a MAC payload for Random Access Response (MAC RAR). If the base station detects Random Access requests from multiple terminals on the same Physical Random Access Channel (PRACH) resource, the base station multiplexes Random Access response messages sent to the multiple terminals into the same MAC Protocol Data Unit (MAC PDU). The MAC PDU comprises a MAC subheader, and a MAC RAR may follow the MAC subheader. When the terminal analyzes the MAC PDU, the MAC subheaders therein are sequentially analyzed to find the MAC subheader containing the Information required by the terminal, and as for whether a MAC RAR exists behind the MAC subheader of the MAC PDU, the current terminal determines that the terminal compares a Random Access Preamble ID (RAPID) analyzed from the MAC PDU with a System Information Preamble index (SI Preamble index) list configured by Radio Resource Control (RRC), and if the RAPID is not in the list, the MAC subheader is considered to have the corresponding MAC RAR.
However, a plurality of RAPID may be included in one MAC PDU, so the terminals need to compare one by one, which increases the complexity of analyzing the MAC PDU by the terminals and reduces the efficiency of analyzing. In addition, when the SI preamble index list configured by RRC is in error, it may cause an error in the offset of the whole MAC PDU analysis, so that all the following analyses will be in error, and the range of possible fault spread is enlarged, and a problem of being unpredictable is caused.
Disclosure of Invention
An object of the embodiments of the present application is to provide an information parsing method, a sending method, an apparatus, an electronic device, and a storage medium, so as to solve the problems of the prior art that a terminal has a high complexity for parsing a MAC PDU and a low parsing efficiency.
In a first aspect, an embodiment of the present application provides an information parsing method, which is applied to a terminal, and the method includes:
receiving a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control subprotocol data unit (MAC sub PDU), the MAC sub PDU comprises an MAC subheader, the MAC subheader comprises a target indication domain, and the target indication domain is used for indicating whether the MAC subheader has a corresponding media access control load (MAC RAR) for the random access response;
and analyzing a target indication domain in the MAC subheader of the MAC PDU to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
In the implementation process, the target indication domain in the MAC subheader of the MAC PDU is analyzed by receiving the MAC PDU corresponding to the random access response to determine whether the MAC subheader of the target indication domain has the corresponding MAC RAR, so that the terminal does not need to compare the RAPID in the MAC PDU with the SI preamble index list configured by the RRC to determine whether the MAC RAR corresponding to the MAC subheader exists, but can determine whether the MAC subheader of the target indication domain has the corresponding MAC RAR by analyzing the target indication domain, thereby reducing the complexity of terminal analysis, improving the efficiency of terminal analysis, and reducing the range of possible miscarriages of terminal analysis.
Optionally, the target indication field is further configured to indicate a type of the MAC subheader, where the type includes at least one of: a subheader containing a backoff indicator BI, a subheader containing a random access preamble identifier RAPID, a subheader containing padding bits padding. Thus, by analyzing the target indication field, the type of the MAC subheader can be quickly determined.
Optionally, the parsing the target indication field in the MAC subheader of the MAC PDU includes:
if the target indication domain is analyzed to obtain a first preset value, representing that the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR;
if the target indication domain is analyzed to obtain a second preset value, the MAC sub-head where the analyzed target indication domain is located is represented as a sub-head containing BI;
if the target indication domain is analyzed to obtain a third preset value, the MAC sub-header where the analyzed target indication domain is located is represented as a sub-header containing an RAPID;
and if the target indication domain is analyzed to obtain a fourth preset value, representing that the MAC subheader of the analyzed target indication domain is a subheader containing padding.
In the implementation process, the type of the MAC subheader and whether the corresponding MAC RAR exists in the MAC subheader are indicated by the target indication field, and the terminal can directly obtain corresponding information according to the target indication field in the MAC subheader, so as to realize quick determination of whether the MAC RAR exists and the type of the MAC subheader, reduce the complexity of MAC PDU analysis, improve the analysis efficiency, and reduce the possible spread range when the analysis error occurs.
Optionally, if the MAC PDU includes a MAC subheader of a type including padding subheader, it is characterized that the MAC subheader is located at the last of the MAC PDU. This allows the meaning of the E field in the original MAC subheader to be replaced by the target indication field.
Optionally, the target indication field occupies a T field and an E field in the MAC subheader where the target indication field is located. Therefore, the length of the original MAC subheader does not need to be changed, and resources are saved.
Optionally, the target indication field occupies a newly added field in the MAC subheader where the target indication field is located. Therefore, whether the MAC subheader has the corresponding MAC RAR can be judged by analyzing the target indication domain in the MAC subheader, and the MAC PDU can be quickly analyzed.
In a second aspect, an embodiment of the present application provides an information sending method, which is applied to a base station, and the method includes:
generating a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control subprotocol data unit (MAC sub PDU), the MAC sub PDU comprises an MAC subheader, the MAC subheader comprises a target indication domain, and the target indication domain is used for indicating whether the MAC subheader has a corresponding media access control load (MAC RAR) for the random access response;
and transmitting the MAC PDU.
In the implementation process, whether the MAC RAR corresponding to the MAC subheader exists is indicated by using the target indication field in the MAC subheader, so that the terminal does not need to compare the RAPID in the MAC PDU with the SI preamble index list configured by the RRC to determine whether the MAC RAR corresponding to the MAC subheader exists, but can determine whether the MAC subheader where the target indication field exists has the corresponding MAC RAR by analyzing the target indication field, thereby reducing the complexity of terminal analysis, improving the terminal analysis efficiency, and reducing the range that the terminal may reach when an error occurs in terminal analysis.
In a third aspect, an embodiment of the present application provides an information analysis apparatus, which operates on a terminal, and includes:
the device comprises an information receiving module and a random access response processing module, wherein the information receiving module is used for receiving a media access control protocol data unit (MAC PDU) corresponding to the random access response, the MAC PDU comprises a media access control sub-protocol data unit (MAC sub-PDU), the MAC sub-PDU comprises an MAC sub-head, the MAC sub-head comprises a target indication domain, and the target indication domain is used for indicating whether the MAC sub-head has a corresponding media access control load (MAC RAR) for the random access response;
and the information analysis module is used for analyzing the target indication domain in the MAC subheader of the MAC PDU so as to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
In a fourth aspect, an embodiment of the present application provides an information sending apparatus, operating in a base station, where the apparatus includes:
the information generating module is used for generating a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control sub-protocol data unit (MAC sub-PDU), the MAC sub-PDU comprises an MAC sub-head, the MAC sub-head comprises a target indication domain, and the target indication domain is used for indicating whether the MAC sub-head has a corresponding media access control load (MAC RAR) used for the random access response;
and the information sending module is used for sending the MAC PDU.
In a fifth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, where the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the method of the first or second aspect is executed.
In a sixth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, performs the steps in the method as provided in the first or second aspect.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;
fig. 2 is a diagram illustrating a contention random access procedure in the prior art;
fig. 3 is a diagram illustrating a non-contention random access process in the prior art;
fig. 4 is a flowchart of an information parsing method according to an embodiment of the present application;
FIG. 5 is a diagram illustrating a MAC PDU format according to the prior art;
FIG. 6 is a diagram illustrating a MAC subheader format in the prior art;
fig. 7 is a schematic diagram illustrating a format of an improved MAC subheader according to an embodiment of the present application;
fig. 8 is a schematic diagram illustrating a format of an improved MAC PDU according to an embodiment of the present application;
fig. 9 is a schematic diagram of another modified MAC PDU format according to an embodiment of the present application;
fig. 10 is a flowchart of an information sending method according to an embodiment of the present application;
fig. 11 is a block diagram of an information analysis apparatus according to an embodiment of the present application;
fig. 12 is a block diagram of an information transmitting apparatus according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of an electronic device for executing an information analysis method or an information sending method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
It should be noted that the terms "system" and "network" in the embodiments of the present invention may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present invention. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.
The information analysis method and the information transmission method in the embodiment of the application can be applied to a 5G New Radio (NR), a 6G system and various subsequent evolved communication systems.
As shown in fig. 1, the information analysis method or the information transmission method in the present application can be applied to the communication system 100 shown in fig. 1. The communication system 100 comprises a base station 10 and a terminal 20, and the base station 10 may provide communication coverage for an area and may communicate with the terminal 20 located in the area. In some embodiments, the base station 10 may be a base station in a 5G NR system, a 6G system, and various subsequent evolved communication systems.
Terminal 20 may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal in a 5G network or a terminal in a future evolved PLMN, a 6G system, and various subsequent evolved communication systems, etc.
To facilitate an understanding of the concepts of the present application, a brief introduction will be made below to some concepts involved in the present application.
1. And (3) competing random access: generally, the method is used for a terminal for which a base station has not established a connection with a terminal or needs to reestablish a connection, the terminal selects a random access resource by itself at this time, and when a plurality of terminals select the same resource, a collision occurs, so that a collision resolution mechanism is needed to ensure the success of random access.
The contention access process is shown in fig. 2, and the process is as follows:
(1) the terminal transmits a random access preamble signal to the base station. The random access preamble signal is used for identifying a terminal initiating a random access request, and is used as a basis for the base station to perform uplink transmission delay measurement, and the preamble signal is marked by a unique identifier RAPID.
(2) And the base station sends a random access response (including sending MAC PDU corresponding to the random access response, wherein the MAC PDU may carry the MAC RAR) to the terminal. After the terminal transmits the random access preamble signal, a Physical Downlink Control Channel (PDCCH) is monitored in a Transmission Time Interval (TTI) window to obtain a MAC RAR, and once it is monitored that Downlink Control Information (DCI) of the PDCCH has a RA-Radio Network Temporary Identifier (RA-RNTI) which is selected in the step of transmitting the random access preamble signal, the MAC PDU is received.
The MAC PDU may contain response information of a plurality of random access preamble signals, and the MAC PDU is actually multicast information, and all terminals that select the same time-frequency resource to transmit the preamble signal may receive the message. Therefore, the terminal also needs to detect whether the message contains a matching RAPID after receiving the MAC PDU.
If the MAC PDU message received by the terminal does not have a RAPID matching the terminal, the terminal performs backoff according to a Backoff Indicator (BI) value in the MAC PDU message, and reselects the preamble sequence when transmitting the preamble signal again.
And if the MAC PDU message received by the terminal has the RAPID matched with the terminal, the terminal considers that the MAC PDU is successfully received. If the MAC subheader including the RAPID is followed by the MAC RAR, the terminal can obtain Timing Advance (TA) information for uplink synchronization by analyzing the MAC RAR message, obtain uplink resources allocated by the base station for subsequent data transmission, and extract the temporary cell identifier.
(3) And after the terminal successfully receives the MAC PDU message, the terminal sends first data in the uplink authorization appointed by the MAC PDU message after finishing uplink synchronization. For the initial access scenario, the terminal sends a connection establishment request message of the RRC layer on the uplink grant.
(4) The base station transmits a message of contention resolution to the terminal.
2. Non-contention random access: the method is used for the terminal which establishes connection with the base station, and the terminal can assign random access resources to the terminal through the message of the RRC layer, so that the terminal is prevented from colliding with other terminals due to the fact that the same resources are selected, and the success probability of random access is improved.
The procedure of non-contention access is shown in fig. 3, and the procedure is as follows:
(1) the base station transmits a random access preamble sequence allocation message to the terminal.
(2) The terminal sends a random access preamble signal assigned by the base station to the base station.
(3) The base station sends a random access response to the terminal at the MAC layer.
The embodiment of the application provides an information analysis method, which is applied to a terminal, and analyzes a target indication domain in an MAC sub-header of an MAC PDU by receiving the MAC PDU corresponding to a random access response to determine whether the MAC sub-header where the target indication domain is located has a corresponding MAC RAR, so that the terminal does not need to compare the RAPID in the MAC PDU with an SI preamble index list configured by RRC to determine whether the MAC RAR corresponding to the MAC sub-header exists, but can determine whether the MAC sub-header where the target indication domain is located has the corresponding MAC RAR by analyzing the target indication domain, thereby reducing the complexity of terminal analysis, improving the terminal analysis efficiency, and reducing the range of possible miscarriages of terminal analysis.
Referring to fig. 4, fig. 4 is a flowchart of an information parsing method according to an embodiment of the present application, where the method includes the following steps:
step S210: and receiving the MAC PDU corresponding to the random access response.
The application scenario of the information analysis method of the application may be the above-mentioned contention random access or non-contention random access scenario, and no matter which random access is, the terminal needs to send a random access preamble RAPID to the base station in the access process, and the random access preamble may be assigned by the base station or selected by the terminal itself, and after receiving the RAPID sent by the terminal, the base station first generates a MAC PDU corresponding to a random access response sent to the terminal, that is, the MAC PDU carries related information and feeds back to the terminal, so that the terminal can receive the MAC PDU sent by the base station.
The structure of the MAC PDU may be as shown in fig. 5, where the MAC PDU includes a media access control sub-protocol data unit (MAC sub-PDU), that is, a MAC subPDU, where the MAC subPDU includes a MAC subheader, and the MAC subheader may have a corresponding MAC RAR, and if the MAC subheader does not have a corresponding MAC RAR, the MAC subheader independently forms a MAC subPDU, and all MAC subheaders are sequentially arranged. When the MAC PDU includes two MAC subpdus, the two MAC subpdus are sequentially arranged, which may enable the base station to quickly respond to random access requests from a plurality of terminals.
The MAC subheader may be of three types, such as: a MAC subheader including a BI, a MAC subheader including a RAPID, and a RAR. The MAC subheader carrying the BI does not have a corresponding MAC RAR, and the format of the existing MAC subheader is shown in fig. 6, for example, the MAC subheader containing the BI includes an E domain, a T domain, an R domain, and the BI, and the MAC subheader containing the RAPID includes an E domain, a T domain, and a RAPID.
And the E field is used for indicating whether other sub heads exist behind the current sub head or not, occupies 1bit, takes 0 to indicate that the current sub head is the last sub head, and is 1 to indicate that the sub head exists behind the current sub head. The T field represents a type field, occupies 1bit, is 1 to represent that the current subheader is the MAC subheader containing RAPID, and is 0 to represent that the current subheader is the MAC subheader containing BI. The R field is a reserved field.
However, since the original MAC subheader does not have a domain for indicating whether the MAC subheader has a corresponding MAC RAR, the structure of the original MAC subheader is improved in the present application, specifically, the MAC subheader includes a target indication domain for indicating whether the MAC subheader has a corresponding MAC RAR.
Step S220: and analyzing a target indication domain in the MAC subheader of the MAC PDU to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
After receiving the MAC PDU, the terminal compares the RAPID in the MAC PDU with the RAPID sent to the base station, and then determines whether there is a MAC RAR behind the MAC subheader, and the analysis result includes the following conditions:
case 1: and if the RAPID in the MAC PDU is consistent with the RAPID sent to the base station and the MAC RAR exists behind the MAC subheader, analyzing the MAC RAR and acquiring related information from the MAC RAR.
Case 2: and if the RAPID in the MAC PDU is consistent with the RAPID sent to the base station and no MAC RAR exists behind the MAC subheader, ending the analysis.
Case 3: and if the RAPID in the MAC PDU is inconsistent with the RAPID sent to the base station and an MAC RAR exists behind the MAC subheader, skipping the MAC RAR and continuously analyzing the next MAC subheader.
Case 4: and if the RAPID in the MAC PDU is inconsistent with the RAPID sent to the base station and no MAC RAR exists behind the MAC subheader, continuously analyzing the next MAC subheader.
That is to say, determining whether there is a MAC RAR behind the MAC sub-header relates to the analysis efficiency of the terminal, and since the MAC PDU may include multiple RAPID, the terminal in the prior art needs to sequentially compare the RAPID with the SI preamble index list configured by the current RRC to determine whether there is a MAC RAR behind the MAC sub-header, so that the analysis efficiency of the terminal is low. In order to enable the terminal to judge whether corresponding MAC RARs exist without comparing the RAPID in the MAC PDU with the SI preamble index list configured by the current RRC, so that the judging efficiency of whether the corresponding MAC RARs exist behind the MAC subheader is improved, and further the analysis efficiency of the terminal is improved.
In some embodiments, a Byte (Byte) may be added to the MAC subheader including the RAPID for filling in the new field (for example, the new field is K field, which may be located between the T field and the RAPID), and whether the MAC subheader has a corresponding MAC RAR is indicated by the K field, that is, the target indication field occupies the new field in the MAC subheader. When the base station generates the MAC PDU, the base station may fill related information in the K domain, for example, fill 1 indicates that the MAC subheader has a corresponding MAC RAR, fill 0 indicates that the MAC subheader does not have a corresponding MAC RAR, so that when the terminal performs parsing, the terminal may parse a value of the K domain in the MAC subheader including the RAPID, and thus may determine whether the current MAC subheader has a corresponding MAC RAR according to the value of the K domain.
It can be understood that, if the MAC PDU received by the terminal includes multiple MAC subpdus, that is, multiple MAC subheaders, when the terminal parses a certain MAC subheader, the terminal may parse a target indication field in the MAC subheader to determine whether the MAC subheader has a corresponding MAC RAR according to the target indication field in the MAC subheader.
After the terminal equipment analyzes the target indication domain, a corresponding analysis result can be obtained. For example, when the terminal analyzes that the value of K field in a MAC subheader containing RAPID is 1, it is determined that the MAC subheader has a corresponding MAC RAR, at this time, if the RAPID is consistent with the RAPID sent by the terminal to the base station, it indicates that the MAC RAR is the terminal, the terminal can continue analyzing the MAC RAR to obtain corresponding access information without analyzing subsequent content, and if the RAPID is inconsistent with the RAPID sent by the terminal to the base station, it indicates that the MAC RAR is not the terminal, and the terminal can skip the MAC RAR to continue analyzing the next MAC subheader. And when the terminal analyzes that the value of the K field in the MAC sub-header containing the RAPID is 0, determining that the MAC sub-header has no corresponding MAC RAR, and if the RAPID is not consistent with the RAPID sent to the base station by the terminal, the terminal can continue to analyze the following MAC sub-header so as to continue to analyze and judge whether the corresponding MAC RAR exists. When the terminal analyzes that the value of the K field in the MAC sub-header containing the RAPID is 0, the MAC sub-header is determined to have no corresponding MAC RAR, and at the moment, if the RAPID is consistent with the RAPID sent to the base station by the terminal, the analysis is finished, and the subsequent MAC sub-header is not analyzed any more.
In practical applications, in the MAC PDU structure, the MAC subheader precedes the MAC RAR, or the MAC subheader precedes and is immediately adjacent to the MAC RAR, so as to meet the requirements of the 5G system.
In the implementation process, the target indication domain in the MAC subheader of the MAC PDU is analyzed by receiving the MAC PDU corresponding to the random access response to determine whether the MAC subheader of the target indication domain has the corresponding MAC RAR, so that the terminal does not need to compare the RAPID in the MAC PDU with the SI preamble index list configured by the RRC to determine whether the MAC RAR corresponding to the MAC subheader exists, but can determine whether the MAC subheader of the target indication domain has the corresponding MAC RAR by analyzing the target indication domain, thereby reducing the complexity of terminal analysis, improving the efficiency of terminal analysis, and reducing the range of possible miscarriages.
In other embodiments, the target indication field may occupy a T field and an E field in the MAC subheader, and may be referred to as a T field (but the T field at this time has a different meaning from the original T field), and the present application improves the structure of the MAC subheader described in fig. 6, as shown in fig. 7 (three types of MAC subheaders are shown in fig. 7, namely, a MAC subheader containing a BI, a MAC subheader containing a RAPID, and a MAC subheader containing a padding). In the application, the E field and the T field in the MAC subheader are merged into a target indication field (denoted by T in the figure), and the indication meaning of the target indication field is redefined. The target indication field may occupy 2 bits in each MAC subheader for indicating whether there is a MAC RAR corresponding to its MAC subheader.
The meaning indicated by the target indication domain in the application is different from the meaning indicated by the original T domain (although the T domain is called, the original T domain occupies 1bit), and the target indication domain occupies 2 bits, so that whether the MAC subheader has the corresponding MAC RAR can be indicated through the value of the target indication domain, and if the value of the target indication domain is 1, the MAC subheader has the corresponding MAC RAR.
That is, the base station and the terminal may agree in advance that when the target indication field takes a preset value, it is determined that the MAC subheader has a corresponding MAC RAR, so that after the terminal analyzes the MAC subheader, if the target indication field is analyzed to obtain the first preset value, it represents that the MAC subheader where the analyzed target indication field is located has a corresponding MAC RAR.
The first preset value may be a value preset and negotiated by the base station and the terminal, for example, 1 or 2, and a specific value thereof may be flexibly set according to an actual requirement.
In the implementation process, the terminal can directly judge whether the MAC subhead has the corresponding MAC RAR according to the target indication domain in the MAC subhead by modifying the corresponding field in the MAC subhead, so that the judgment efficiency is improved, the complexity of MAC PDU analysis is reduced, and the analysis efficiency is improved.
On the basis of the above embodiment, in order to not change the length of the MAC subheader and save resources, and in addition, if the target indication field in the present application occupies 2 bits, different values may also be taken for the target indication field to represent different types of the MAC subheader, that is, the target indication field is also used to indicate the type of the MAC subheader where the target indication field is located, where the type includes at least one of the following types: a subheader containing the BI, a subheader containing the RAPID, a subheader containing the padding bits padding.
Thus, after the terminal analyzes the target indication field in the MAC subheader, if the target indication field is analyzed to obtain the second preset value, the MAC subheader where the analyzed target indication field is located is characterized as the subheader containing BI, if the target indication field is analyzed to obtain the third preset value, the MAC subheader where the analyzed target indication field is located is characterized as the subheader containing RAPID, and if the target indication field is analyzed to obtain the fourth preset value, the MAC subheader where the analyzed target indication field is located is characterized as the subheader containing padding.
The first preset value, the second preset value, the third preset value and the fourth preset value are different and can be set according to actual conditions, if the first preset value is 2, it indicates that when the value of the target indication field is 2, the current MAC subheader includes RAPID and has a corresponding MAC RAR; the second preset value is 3, which means that when the value of the target indication field is 3, the current MAC subheader contains BI; the third preset value is 1, which means that when the value of the target indication field is 1, the current MAC subheader only contains RAPID and does not have corresponding MAC RAR; the fourth preset value is 0, which means that when the value of the target indication field is 0, the current MAC subheader contains padding.
In this way, R can still be a reserved field, and when the resource is sufficient, there is padding, and an example of a format of MAC PDU can be as shown in fig. 8.
In the implementation process, the type of the MAC subheader and whether the corresponding MAC RAR exists in the MAC subheader are indicated by the target indication field, and the terminal can directly obtain corresponding information according to the target indication field in the MAC subheader, so as to realize quick judgment of whether RAR exists and the type of the MAC subheader, reduce the complexity of MAC PDU analysis, improve the analysis efficiency, and reduce the possible spread range when the analysis error occurs.
On the basis of the foregoing embodiment, although the target indication field occupies the original E field, the content indicated by the original E field may be indicated by the target indication field, for example, when the length of the data corresponding to each MAC subheader is fixed, and when the target indication field is resolved to 0, it indicates that the current MAC subheader contains padding, and there is no MAC subheader to be resolved continuously in the following, which is equivalent to a function of replacing the E field in the existing MAC subheader with the target indication field.
That is, if the MAC PDU includes a MAC subheader of a type including padding, the MAC subheader is located at the end of the MAC PDU, so that when the terminal resolves to the target indication field of 0, the MAC subheader includes padding, which means that the MAC PDU has no MAC subheader, and thus the terminal does not need to continue resolving.
However, when the resource is not sufficient, there may be no padding in the MAC PDU, and the format is as shown in fig. 9, in this case, the terminal cannot determine whether the current MAC subheader is the last subheader, and can determine whether there is content in the following according to the total length of the MAC PDU, and whether the terminal needs to continue parsing, which is equivalent to completing the function of the E domain in the original MAC subheader according to the total length of the MAC PDU.
Based on the same inventive concept as the above embodiment, an embodiment of the present application further provides an information sending method, as shown in fig. 10, where the method is applied to a base station, and includes the following steps:
step S310: and generating the MAC PDU corresponding to the random access response.
After receiving the random access preamble signal sent by the terminal, the base station sends a random access response to the terminal through the MAC PDU, and the base station can carry corresponding response information in the MAC PDU. The MAC sub-PDU comprises an MAC sub-head, the MAC sub-head comprises a target indication domain, and the target indication domain is used for indicating whether the MAC sub-head has a corresponding media access control load (MAC RAR) for random access response.
It can be understood that, for the specific representation method of the target indication domain, reference may be made to the contents of the foregoing embodiments, and for convenience and brevity of description, repeated descriptions are not repeated here.
Step S320: and transmitting the MAC PDU.
The terminal is used for analyzing a target indication domain in the MAC subheader of the MAC PDU so as to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
It can be understood that, for convenience and simplicity of description, it is clear to those skilled in the art that, for the specific working process of the terminal parsing the target indication field and determining whether there is a MAC RAR corresponding to its MAC subheader according to the parsing result, reference may be made to the corresponding process in the foregoing method embodiment, and a description thereof is not repeated here.
Optionally, the target indication field is further configured to indicate a type of the MAC subheader, where the type includes at least one of: a subheader containing a backoff indicator BI, a subheader containing a random access preamble identifier RAPID, a subheader containing padding bits padding. Thus, by analyzing the target indication field, the type of the MAC subheader can be quickly determined.
Optionally, if the target indication domain is analyzed to obtain a first preset value, a corresponding MAC RAR is represented at an MAC subheader where the analyzed target indication domain is located;
if the target indication domain is analyzed to obtain a second preset value, the MAC sub-head where the analyzed target indication domain is located is represented as a sub-head containing BI;
if the target indication domain is analyzed to obtain a third preset value, the MAC sub-header where the analyzed target indication domain is located is represented as a sub-header containing an RAPID;
and if the target indication domain is analyzed to obtain a fourth preset value, representing that the MAC subheader of the analyzed target indication domain is a subheader containing padding.
Optionally, if the MAC PDU includes a MAC subheader of a type including padding subheader, it is characterized that the MAC subheader is located at the last of the MAC PDU.
Optionally, the target indication field occupies a T field and an E field in the MAC subheader where the target indication field is located.
Optionally, the target indication field occupies a newly added field in the MAC subheader where the target indication field is located.
In the implementation process, whether the RAR corresponding to the MAC subheader exists is indicated by using the target indication field in the MAC subheader, so that the terminal does not need to compare the RAPID in the MAC PDU with the SI preamble index list configured by the RRC to determine whether the MAC RAR corresponding to the MAC subheader exists, but can determine whether the MAC subheader where the target indication field exists has the corresponding MAC RAR by analyzing the target indication field, thereby reducing the complexity of terminal analysis, improving the terminal analysis efficiency, and reducing the range of possible coverage when the terminal analyzes an error.
Referring to fig. 11, fig. 11 is a block diagram of an information analysis apparatus 400 according to an embodiment of the present disclosure, where the apparatus 400 operates on a terminal, and the apparatus 400 may be a module, a program segment, or a code on the terminal. It should be understood that the apparatus 400 corresponds to the above-mentioned embodiment of the method of fig. 6, and can perform various steps related to the embodiment of the method of fig. 6, and the specific functions of the apparatus 400 can be referred to the above description, and the detailed description is appropriately omitted here to avoid redundancy.
Optionally, the apparatus 400 comprises:
an information receiving module 410, configured to receive a MAC PDU corresponding to a random access response, where the MAC PDU includes a MAC subPDU, the MAC subPDU includes a MAC subheader, and the MAC subheader includes a target indication field, and the target indication field is used to indicate whether the MAC subheader has a corresponding MAC RAR for random access response;
an information parsing module 420, configured to parse a target indication field in a MAC subheader of the MAC PDU, so as to determine whether a MAC subheader where the parsed target indication field is located has a corresponding MAC RAR.
Optionally, the target indication field is further configured to indicate a type of the MAC subheader, where the type includes at least one of: a subheader containing a backoff indicator BI, a subheader containing a random access preamble identifier RAPID, a subheader containing padding bits padding.
Optionally, if the information analysis module 420 analyzes to obtain the first preset value, it represents that the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR; if the information analysis module 420 analyzes to obtain the second preset value, the MAC subheader where the analyzed target indication domain is located is represented as a subheader containing BI; if the information analysis module 420 analyzes to obtain a third preset value, the MAC subheader where the analyzed target indication domain is located is represented as a subheader containing RAPID; if the information analyzing module 420 analyzes to obtain the fourth preset value, it represents that the MAC subheader where the analyzed target indication field is located is a subheader containing padding.
Optionally, if the MAC PDU includes a MAC subheader of a type including padding subheader, it is characterized that the MAC subheader is located at the last of the MAC PDU.
Optionally, the target indication field occupies a T field and an E field in the MAC subheader where the target indication field is located.
Optionally, the target indication field occupies a newly added field in the MAC subheader where the target indication field is located.
Referring to fig. 12, fig. 12 is a block diagram of an information sending apparatus 500 according to an embodiment of the present application, where the apparatus 500 operates in a base station, and the apparatus 500 may be a module, a program segment, or a code on the base station. It should be understood that the apparatus 500 corresponds to the above-mentioned embodiment of the method of fig. 10, and can perform various steps related to the embodiment of the method of fig. 10, and the specific functions of the apparatus 500 can be referred to the above description, and the detailed description is appropriately omitted here to avoid redundancy.
Optionally, the apparatus 500 comprises:
an information generating module 510, configured to generate a MAC PDU corresponding to a random access response, where the MAC PDU includes a MAC subPDU, the MAC subPDU includes a MAC subheader, and the MAC subheader includes a target indication field, and the target indication field is used to indicate whether a corresponding MAC subheader has a corresponding MAC RAR for random access response;
an information sending module 520, configured to send the MAC PDU. The terminal is used for analyzing a target indication domain in the MAC subheader of the MAC PDU so as to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
Optionally, the target indication field is further configured to indicate a type of the MAC subheader, where the type includes at least one of: a subheader containing a backoff indicator BI, a subheader containing a random access preamble identifier RAPID, a subheader containing padding bits padding.
Optionally, if the target indication domain is analyzed to obtain a first preset value, a corresponding MAC RAR is represented at an MAC subheader where the analyzed target indication domain is located; if the target indication domain is analyzed to obtain a second preset value, the MAC sub-head where the analyzed target indication domain is located is represented as a sub-head containing BI; if the target indication domain is analyzed to obtain a third preset value, the MAC sub-header where the analyzed target indication domain is located is represented as a sub-header containing an RAPID; and if the target indication domain is analyzed to obtain a fourth preset value, representing that the MAC subheader of the analyzed target indication domain is a subheader containing padding.
Optionally, if the MAC PDU includes a MAC subheader of a type including padding subheader, it is characterized that the MAC subheader is located at the last of the MAC PDU.
Optionally, the target indication field occupies a T field and an E field in the MAC subheader where the target indication field is located.
Optionally, the target indication field occupies a newly added field in the MAC subheader where the target indication field is located.
It should be noted that, for the convenience and brevity of description, the specific working procedure of the above-described apparatus may refer to the corresponding procedure in the foregoing method embodiment, and the description is not repeated herein.
Referring to fig. 13, fig. 13 is a schematic structural diagram of an electronic device for executing an information analysis method or an information sending method according to an embodiment of the present application, where the electronic device may include: at least one processor 610, such as a CPU, at least one communication interface 620, at least one memory 630, and at least one communication bus 640. Wherein communication bus 640 is used to enable direct, coupled communication of these components. The communication interface 620 of the device in the embodiment of the present application is used for performing signaling or data communication with other node devices. The memory 630 may be a high-speed RAM memory or a non-volatile memory (e.g., at least one disk memory). The memory 630 may optionally be at least one memory device located remotely from the aforementioned processor. The memory 630 stores computer readable instructions, and when the computer readable instructions are executed by the processor 610, the electronic device executes the method process shown in fig. 4 or fig. 10.
It will be appreciated that the configuration shown in fig. 13 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 13 or have a different configuration than shown in fig. 13. The components shown in fig. 13 may be implemented in hardware, software, or a combination thereof.
Embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the method processes performed by an electronic device in the method embodiments shown in fig. 4 or fig. 10.
The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments, for example, comprising: receiving a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control subprotocol data unit (MAC sub PDU), the MAC sub PDU comprises an MAC subheader, the MAC subheader comprises a target indication domain, and the target indication domain is used for indicating whether the MAC subheader has a corresponding media access control load (MAC RAR) for the random access response; and analyzing a target indication domain in the MAC subheader of the MAC PDU to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
To sum up, embodiments of the present application provide an information parsing method, a transmitting method, an apparatus, an electronic device, and a storage medium, where a MAC PDU corresponding to a random access response is received, and a target indication field in an MAC subheader of the MAC PDU is parsed to determine whether a corresponding MAC RAR exists in the MAC subheader of the target indication field, so that a terminal does not need to compare a RAPID in the MAC PDU with an SI preamble index list configured by an RRC to determine whether a MAC RAR corresponding to the MAC subheader exists, but can determine whether a corresponding MAC RAR exists in the MAC subheader of the target indication field by parsing the target indication field, thereby reducing complexity of terminal parsing, improving terminal parsing efficiency, and reducing a range that may be affected when the terminal parses an error.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. An information analysis method is applied to a terminal, and the method comprises the following steps:
receiving a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control subprotocol data unit (MAC sub PDU), the MAC sub PDU comprises an MAC subheader, the MAC subheader comprises a target indication domain, and the target indication domain is used for indicating whether the MAC subheader has a corresponding media access control load (MAC RAR) for the random access response;
and analyzing a target indication domain in the MAC subheader of the MAC PDU to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
2. The method of claim 1, wherein the target indication field is further configured to indicate a type of the MAC subheader, and wherein the type includes at least one of: a subheader containing a backoff indicator BI, a subheader containing a random access preamble identifier RAPID, a subheader containing padding bits padding.
3. The method of claim 2, wherein the parsing the target indication field in the MAC subheader of the MAC PDU comprises:
if the target indication domain is analyzed to obtain a first preset value, representing that the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR;
if the target indication domain is analyzed to obtain a second preset value, the MAC sub-head where the analyzed target indication domain is located is represented as a sub-head containing BI;
if the target indication domain is analyzed to obtain a third preset value, the MAC sub-header where the analyzed target indication domain is located is represented as a sub-header containing an RAPID;
and if the target indication domain is analyzed to obtain a fourth preset value, representing that the MAC subheader of the analyzed target indication domain is a subheader containing padding.
4. The method of claim 2 wherein if the MAC PDU includes a MAC subheader of a type including padding subheader, then characterizing that the MAC subheader is located at the end of the MAC PDU.
5. The method of claim 1, wherein the target indication field occupies a T field and an E field in the MAC subheader, or wherein the target indication field occupies a newly added field in the MAC subheader.
6. An information sending method, applied to a base station, the method comprising:
generating a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control subprotocol data unit (MAC sub PDU), the MAC sub PDU comprises an MAC subheader, the MAC subheader comprises a target indication domain, and the target indication domain is used for indicating whether the MAC subheader has a corresponding media access control load (MAC RAR) for the random access response;
and transmitting the MAC PDU.
7. An information analysis device, operating in a terminal, the device comprising:
the device comprises an information receiving module and a random access response processing module, wherein the information receiving module is used for receiving a media access control protocol data unit (MAC PDU) corresponding to the random access response, the MAC PDU comprises a media access control sub-protocol data unit (MAC sub-PDU), the MAC sub-PDU comprises an MAC sub-head, the MAC sub-head comprises a target indication domain, and the target indication domain is used for indicating whether the MAC sub-head has a corresponding media access control load (MAC RAR) for the random access response;
and the information analysis module is used for analyzing the target indication domain in the MAC subheader of the MAC PDU so as to determine whether the MAC subheader of the analyzed target indication domain has a corresponding MAC RAR.
8. An information transmission apparatus, operable in a base station, the apparatus comprising:
the information generating module is used for generating a media access control protocol data unit (MAC PDU) corresponding to a random access response, wherein the MAC PDU comprises a media access control sub-protocol data unit (MAC sub-PDU), the MAC sub-PDU comprises an MAC sub-head, the MAC sub-head comprises a target indication domain, and the target indication domain is used for indicating whether the MAC sub-head has a corresponding media access control load (MAC RAR) used for the random access response;
and the information sending module is used for sending the MAC PDU.
9. An electronic device comprising a processor and a memory, wherein the memory stores computer readable instructions, and the computer readable instructions, when executed by the processor, execute the information parsing method according to any one of claims 1-5 or the information transmission method according to claim 6.
10. A computer-readable storage medium on which a computer program is stored, the computer program being characterized in that it runs the information parsing method according to any one of claims 1 to 5 or the information transmission method according to claim 6 when executed by a processor.
CN202111442833.XA 2021-11-30 2021-11-30 Information analysis method, transmission method, device, electronic device and storage medium Pending CN114040516A (en)

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