CN116506971A - MAC PDU transmitting method, receiving method and communication equipment - Google Patents

MAC PDU transmitting method, receiving method and communication equipment Download PDF

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Publication number
CN116506971A
CN116506971A CN202210056555.2A CN202210056555A CN116506971A CN 116506971 A CN116506971 A CN 116506971A CN 202210056555 A CN202210056555 A CN 202210056555A CN 116506971 A CN116506971 A CN 116506971A
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China
Prior art keywords
mac
bearer
domain
field
mac pdu
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CN202210056555.2A
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Chinese (zh)
Inventor
孙军帅
王莹莹
李娜
赵芸
孙欣
张慧敏
刘光毅
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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Priority to CN202210056555.2A priority Critical patent/CN116506971A/en
Priority to PCT/CN2023/072632 priority patent/WO2023138580A1/en
Publication of CN116506971A publication Critical patent/CN116506971A/en
Pending legal-status Critical Current

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    • 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 signalling, i.e. of overhead other than pilot signals
    • 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
    • H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
    • 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
    • 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
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation

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

Abstract

The invention provides a method for sending and receiving a MAC PDU (media access control) and communication equipment.

Description

MAC PDU transmitting method, receiving method and communication equipment
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a method for sending and receiving a MAC PDU and communication equipment.
Background
In 6G, an SBA RAN (Service Based Architecture Radio Access Network, radio access network of a servitization architecture) scheme is proposed. In the SBA RAN scheme, a UE (User Equipment) may have multiple L3UP (layer 3User Plane)/SDAP (Service Data Adaption Protocol, service data adaptation protocol)/PDCP (Packet Data Convergence Protocol )/RLC (Radio Link Control, radio link control) protocol functions at the same time, such as URLLC (Ultra-Reliable and Low Latency Communications, low latency high reliability connection) one L3UP/SDAP/PDCP/RLC protocol function, eMBB (Enhance Mobile Broadband, enhanced mobile bandwidth) one L3UP/SDAP/PDCP/RLC protocol function, etc. Therefore, how to send the data packet to the correct protocol sub-layer functional body at the AS (Access layer) layer is a technical problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a method for sending and receiving a MAC PDU and communication equipment, which are used for solving the problem of how to send a data packet to a correct protocol sub-layer function body.
In order to solve the technical problems, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for sending a MAC PDU, including:
the MAC layer receives MAC SDUs from each bearer connected with the MAC layer, wherein each bearer has a bearer ID uniformly distributed for all established bearers;
the MAC layer builds an MAC PDU according to the bearing ID of each bearing and the corresponding MAC SDU;
the MAC layer transmits the MAC PDU to a physical layer.
Optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, the type of the bearer ID includes: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
In a second aspect, an embodiment of the present invention provides a method for receiving a MAC PDU, including:
the MAC layer receives MAC PDUs from the physical layer;
the MAC layer analyzes the MAC PDU, and if the MAC sub-header of the MAC PDU is analyzed to contain a bearing ID, the routing information of each MAC SDU in the MAC PDU is determined according to the bearing ID; wherein, the bearer ID is an ID uniformly distributed for all established bearers;
and the MAC layer sends each MAC SDU to an upper layer according to the routing information of each MAC SDU.
Optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID includes:
the MAC layer obtains the bearing ID in the MAC sub-header of the MAC PDU and the MAC SDU carried in the MAC PDU;
the MAC layer determines the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the destination protocol sub-layer functional body of the target bearing according to the stored information of each bearing;
the MAC layer determines routing information of each MAC SDU in the MAC PDU according to the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the terminal protocol sub-layer functional body of the target bearing, wherein the routing information comprises: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
Optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID includes:
the MAC layer determines whether the MAC PDU carries an MAC CE or an MAC SDU according to the first domain in the MAC subheader of the MAC PDU;
if the first domain indicates that the MAC PDU carries a MAC SDU, the MAC layer obtains the MAC SDU carried by the MAC PDU according to the third domain in the MAC subheader, and obtains a bearer ID according to the second domain in the MAC subheader;
the MAC layer determines the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the destination protocol sub-layer functional body of the target bearing according to the stored information of each bearing;
the MAC layer determines routing information of each MAC SDU in the MAC PDU according to the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the terminal protocol sub-layer functional body of the target bearing, wherein the routing information comprises: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
Optionally, the type of the bearer ID includes: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
In a third aspect, an embodiment of the present invention provides a communication device, including:
a receiving module, configured to receive a MAC SDU from each bearer connected to a MAC layer, where each bearer has a bearer ID uniformly allocated to all established bearers;
the building module is used for building the MAC PDU according to the bearing ID of each bearing and the corresponding MAC SDU;
and the sending module is used for sending the MAC PDU to a physical layer.
In a fourth aspect, an embodiment of the present invention provides a communication device, including:
a receiving module for receiving the MAC PDU from the physical layer;
the analyzing module is used for analyzing the MAC PDU, and if the MAC sub-header of the MAC PDU contains the bearer ID, determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, the bearer ID is an ID uniformly distributed for all established bearers;
and the sending module is used for sending each MAC SDU to an upper layer according to the routing information of each MAC SDU.
In a fifth aspect, an embodiment of the present invention provides a communication device, including: a processor, a memory, and a program stored in the memory and executable on the processor, the program implementing the steps of the method for transmitting a MAC PDU described in the first aspect when executed by the processor, or the program implementing the steps of the method for receiving a MAC PDU described in the second aspect when executed by the processor.
In a sixth aspect, an embodiment of the present invention provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements the steps of the method for sending a MAC PDU described in the first aspect, or where the computer program when executed by a processor implements the steps of the method for sending a MAC PDU described in the second aspect.
In the embodiment of the invention, based on flexible connection of an end-to-end wireless link, the unified number of the load is realized in the MAC layer, and when the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct protocol sub-layer functional body according to the unified number.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a functional diagram of an AS layer protocol stack of FIG. 6G;
FIG. 2 is a schematic diagram of a topology of an end-to-end wireless link;
FIG. 3-1 is a schematic diagram of a MAC sub-header having an R/F/LCID/L field with an L field of 8 bits;
FIG. 3-2 is a schematic diagram of a MAC sub-header having an R/F/LCID/L field with 16 bits of L field;
3-3 are diagrams of MAC subheader with R/LCID field;
fig. 4-1 is a diagram of DL mac pdu;
fig. 4-2 is a diagram of UL mac pdu;
fig. 5 is a flowchart of a method for transmitting a MAC PDU according to an embodiment of the present invention;
FIGS. 6-1, 6-2 and 6-3 are schematic diagrams illustrating the structure of a MAC PDU according to an embodiment of the present invention;
fig. 7-1, 7-2 and 7-3 are schematic diagrams illustrating the structure of a MAC PDU according to another embodiment of the present invention;
fig. 8 is a flowchart of a method for receiving a MAC PDU according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a communication device according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of a communication device according to still another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following first describes technical contents related to the embodiment of the present invention.
For the design goal of the very simple Network (Lite Network) of the next generation mobile communication, it is proposed to introduce a User Plane (UP) function into L3 (Layer 3) for data processing. An UP function (denoted AS L3 UP) is introduced in L3 (layer 3 protocol of the AS layer in a 5G system includes only RRC (Radio Resource Control, radio resource control) protocol sub-layer) of the AS (Access layer). In the 3G/4G/5G system, L3 at the AS layer (the terminal side, and the RRC protocol layer for the network side) has only a Control Plane (CP), i.e. only the RRC protocol layer (or sub-layer), and the RRC protocol layer completes the radio resource Control function.
The new L2 packet processing function is mainly characterized by receiving upper layer service data, and combining the channel features of the lower layer air interface to form QoS (Quality of Service ) index and operation which give consideration to both air interface and service features.
For L3 of the AS layer, an UP function of the newly added L3 processes a packet in addition to a conventional radio resource control (RRC, CP function of the L3). As shown in fig. 1.
The UP (User Plane) of L3 of the AS layer has a first or more than one transmission function of an IP (Internet Protocol ) packet. With the introduction of the UP function of L3, the existing data processing function of L2 needs to be redefined.
The introduction of L3UP brings new mode of AS layer data processing, and can realize seamless and lossless forward transfer of data when the user moves.
Fig. 2 shows a 6G flexible protocol stack scheme. In this scheme, there are various correspondence relationships between different protocol sublayers, and multiple functional bodies may exist in the same functional protocol sublayers at the same time. In the invention, all links connecting the MAC protocol sub-layer functional bodies can be numbered uniformly, and then the links are traversed to the positions of the protocol stack sub-layer functional bodies of L3 in sequence, and all protocol sub-layer functional bodies and the connections between the protocol stack sub-layer functional bodies are called an end-to-end wireless link. The end-to-end wireless link ID is the value of the unified number of the link connecting the MAC protocol sub-layer functions, such as 0 to n links connecting the MAC as identified in fig. 2.
The concept of MAC PDU according to the present invention will be described below.
One MAC PDU is composed of one or more MAC sub-PDUs. Each MAC sub-PDU consists of one of the following:
MAC sub-header only (including padding);
a MAC subheader and a MAC SDU (Media Access Control Service Data Unit, medium access control service data unit);
a MAC sub-header and a MAC CE (Media Access Control Control Element, media access control unit);
MAC subheader and padding.
Wherein the MAC SDUs are different in size.
Each MAC subheader corresponds to a MAC SDU, MAC CE, or padding.
Referring to fig. 3-1, 3-2 and 3-3, the MAC sub-header, excluding the MAC CE for the fixed size, padding and MAC SDUs including UL CCCH, is composed of four header fields R/F/LCID/L. The MAC subheader for a fixed size MAC CE, padding and MAC SDU containing UL CCCH consists of two header fields R/LCID.
The MAC CEs are put together. As shown in fig. 4-1, DL MAC sub-PDUs with MAC CEs are placed before any MAC sub-PDUs with MAC SDUs and MAC sub-PDUs with padding. As shown in fig. 4-2, the UL MAC sub-PDU with MAC CE is placed after all MAC sub-PDUs with MAC SDUs, before the MAC sub-PDU with padding. The size of the padding may be zero.
Each MAC entity can transmit at most one MAC PDU per TB (transport block).
The MAC subheader consists of the following domains:
LCID: the logical channel ID field identifies the logical channel instance corresponding to the MAC SDU or the type corresponding to the MAC CE or padding. Each MAC subheader has an LCID field. The LCID field size is 6 bits;
l: a length field indicating the length (bytes) of the corresponding MAC SDU or variable-size MAC CE. Each MAC subheader has one L-field, except for MAC subheaders corresponding to MAC CEs of fixed size, padding, and MAC SDUs containing UL CCCH. The size of the L domain is represented by the F domain;
f: format field, which indicates the size of the length field. Each MAC subheader has an F-field, except for MAC subheaders corresponding to MAC CEs of fixed size, padding, and MAC SDUs containing UL CCCH. The size of the F-field is 1 bit. The value 0 represents 8 bits of the length field. A value of 1 represents 16 bits of the length field;
r: the reserved bit is set to "0".
The MAC subheader is octal aligned.
In order to solve the problem of how to send a data packet to a correct protocol sublayer function, as shown in fig. 5, an embodiment of the present invention provides a method for sending a MAC PDU, including:
step 51: the MAC layer receives MAC SDUs from each Bearer connected to the MAC layer, wherein each of the bearers has a Bearer ID (Bearer ID) uniformly allocated for all the established bearers;
the bearers include signaling bearers and data bearers, i.e. signaling bearers and data bearers are uniformly numbered, and bearer IDs are uniformly allocated to the bearers when the bearers are established. For example, the bearer ID may be collectively noted as: bearer id=0, 1,2, ….
In the embodiment of the present invention, when each bearer is established, the following information may be configured for the bearer:
bearer ID (Bearer ID);
the types of bearers include signaling bearers (SB, RRC-MAC direct signaling bearers), SRBs (Signaling Radio Bearer, signaling radio bearers, SRBs 0/1/2/3, etc. for ensuring compatibility, existing signaling radio bearers for the system), DRBs (Data Radio Bearer, data radio bearers, existing data radio bearers for the system, DRBs 0/1, …,63, etc.), data bearers (DB, SDAP-MAC direct or L3UP-MAC direct data bearers), and total four types;
the protocol layer function which needs to be established is carried, and the protocol layer function comprises each protocol sub-layer function body and a final connected protocol sub-layer function body which are experienced in the path;
the QoS (quality of service) requirements (QoS parameters) that the carried data packets require to reach at the MAC layer, such as the number of retransmissions, the recommended MCS (Modulation and coding scheme ) level, whether transmission failures are allowed (over multiple retransmissions), whether each data packet requires concurrent multiprocessing transmission, HARQ employed per data packet (Hybrid Automatic Repeat reQuest ) or mode of HARQ process (synchronous or asynchronous) and/or whether preemption is allowed, etc.
In the embodiment of the present invention, the bearer may also be referred to as a link or a channel carrying MAC SDUs, etc.
Step 52: the MAC layer builds an MAC PDU according to the bearing ID of each bearing and the corresponding MAC SDU;
step 53: the MAC layer transmits the MAC PDU to a physical layer.
In the embodiment of the invention, based on flexible connection of an end-to-end wireless link, the unified number of the load is realized in the MAC layer, and when the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct protocol sub-layer functional body according to the unified number.
In the embodiment of the invention, the format of the MAC PDU needs to be defined so as to realize the multi-path data packet transmission according to the end-to-end wireless link.
In some embodiments of the present invention, the format of the existing MAC PDU may be extended to carry the bearer ID, so as to be compatible with the existing MAC PDU format.
Referring to fig. 6-1, for a fixed-size MAC PDU, a MAC subheader of the MAC PDU includes the following fields: a bearer ID field and reserved bits (R field). The bearer ID field is used to indicate the bearer ID of the corresponding bearer.
Fig. 6-2 and 6-3, for a MAC PDU of a non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field (L field), a format field (F field), and a reserved bit (R field);
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
The format of the MAC PDU is directly extended based on the format of the existing MAC PDU, the format of the existing MAC PDU is not changed, the overall format of the MAC PDU is unchanged, and only the LCID (area set identifier) field is newly defined, and a Bearer ID (Bearer ID) is used instead of the LCID.
In the embodiment of the present invention, optionally, the bearer ID includes: LC (Logical Channel), DRB (Data Radio Bearer ), SRB (Signaling Radio Bearer, signaling radio bearer), RRC-MAC direct bearer (SB), SDAP-MAC direct bearer, or L3UP-MAP Direct Bearer (DB).
When the type LC is the type LC, the Bearer at this time is indicated as a 5G existing Bearer format, that is, LCH (logical channel) -RB (Radio Bearer), or the like. When the type is SB, DB, it is the carrier of RRC-MAC direct connection or SDAP (Service Data Adaption Protocol, service data adaptation protocol) -MAC direct connection or L3UP-MAC direct connection.
In other embodiments of the present invention, the format of the MAC PDU may be reconstructed to be used to carry the bearer ID.
Referring to fig. 7-1, for a fixed-size MAC PDU, a MAC subheader of the MAC PDU includes the following fields: a first domain (D/C domain), a second domain (bearer ID/MAC CE ID domain), and reserved bits (R domain);
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain.
Referring to fig. 7-2 and 7-3, for a MAC PDU of a non-fixed size, a MAC subheader of the MAC PDU includes the following fields: a first domain (D/C domain), a second domain (bearer ID/MAC CE ID domain), a third domain (SDU Num domain), a length domain (L domain) and a format domain (F domain);
wherein the first field (D/C field) is used to indicate whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field (SDU Num field) is used for indicating the number of the MAC SDUs; corresponding to the number of L domains;
the length field (L field) is used to indicate the length of the MAC SDU; each L-domain pair uses the length of one MAC SDU;
the format field (F field) is used to indicate the size of the length field. A value of 0 or 1 indicates that two lengths of the L-domain take values, such as 8 bits and 16 bits; or 16 bits and 24 bits; or 16 bits and 32 bits, etc. The specific combination may be defined in terms of the length of the traffic data packet.
In the embodiment of the present invention, optionally, the bearer ID includes: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
The MAC CE ID identifies the type of MAC CE.
Referring to fig. 8, an embodiment of the present invention further provides a method for receiving a MAC PDU, including:
step 81: the MAC layer receives MAC PDUs from the physical layer;
step 82: the MAC layer analyzes the MAC PDU, and if the MAC sub-header of the MAC PDU is analyzed to contain a bearing ID, the routing information of each MAC SDU in the MAC PDU is determined according to the bearing ID; wherein, the bearer ID is an ID uniformly distributed for all established bearers;
the bearers include signaling bearers and data bearers, i.e. signaling bearers and data bearers are uniformly numbered, and bearer IDs are uniformly allocated to the bearers when the bearers are established. For example, the bearer ID may be collectively noted as: bearer id=0, 1,2, ….
Step 83: and the MAC layer sends each MAC SDU to an upper layer according to the routing information of each MAC SDU.
In the embodiment of the invention, based on flexible connection of an end-to-end wireless link, the unified number of the load is realized in the MAC layer, and when the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct protocol sub-layer functional body according to the unified number.
In the embodiment of the invention, the format of the MAC PDU needs to be defined so as to realize the multi-path data packet transmission according to the end-to-end wireless link.
In some embodiments of the present invention, the format of the existing MAC PDU may be extended to carry the bearer ID, so as to be compatible with the existing MAC PDU format.
Optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, the type of the bearer ID includes: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
Based on the format of the MAC PDU, determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID includes:
step 82a1: the MAC layer obtains the bearing ID in the MAC sub-header of the MAC PDU and the MAC SDU carried in the MAC PDU;
step 82a2: the MAC layer determines the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the destination protocol sub-layer functional body of the target bearing according to the stored information of each bearing;
step 82a3: the MAC layer determines routing information of each MAC SDU in the MAC PDU according to the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the terminal protocol sub-layer functional body of the target bearing, wherein the routing information comprises: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
In other embodiments of the present invention, the format of the MAC PDU may be reconstructed to be used to carry the bearer ID.
Optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Based on the format of the MAC PDU, determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID includes:
step 82b1: the MAC layer determines whether the MAC PDU carries an MAC CE or an MAC SDU according to the first domain in the MAC subheader of the MAC PDU;
step 82b2: if the first domain indicates that the MAC PDU carries a MAC SDU, the MAC layer obtains the MAC SDU carried by the MAC PDU according to the third domain in the MAC subheader, and obtains a bearer ID according to the second domain in the MAC subheader;
step 82b3: the MAC layer determines the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the destination protocol sub-layer functional body of the target bearing according to the stored information of each bearing;
step 82b4: the MAC layer determines routing information of each MAC SDU in the MAC PDU according to the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the terminal protocol sub-layer functional body of the target bearing, wherein the routing information comprises: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
Referring to fig. 9, an embodiment of the present invention further provides a communication device 90, including:
a receiving module 91, configured to receive a MAC SDU from each bearer connected to the MAC layer, where each of the bearers has a bearer ID uniformly allocated for all the established bearers;
a constructing module 92, configured to construct a MAC PDU according to the bearer IDs of the bearers and the corresponding MAC SDUs;
a sending module 93, configured to send the MAC PDU to a physical layer.
In some embodiments, optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
In some other embodiments, optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, the type of the bearer ID includes: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
Referring to fig. 10, an embodiment of the present invention further provides a communication device 100, including:
a receiving module 101, configured to receive a MAC PDU from a physical layer;
the parsing module 102 is configured to parse the MAC PDU, and determine routing information of each MAC SDU in the MAC PDU according to the bearer ID if the MAC sub-header of the MAC PDU includes the bearer ID; wherein, the bearer ID is an ID uniformly distributed for all established bearers;
a sending module 103, configured to send each MAC SDU to an upper layer according to the routing information of each MAC SDU.
In some embodiments, optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, the parsing module includes:
a first obtaining submodule, configured to obtain a bearer ID in a MAC subheader of the MAC PDU and a MAC SDU carried in the MAC PDU;
the first determining submodule is used for determining the bearing type of the target bearing corresponding to the bearing ID, each protocol sublayer functional body experienced by the target bearing and the terminal protocol sublayer functional body of the target bearing according to the stored information of each bearing;
a second determining submodule, configured to determine routing information of each MAC SDU in the MAC PDU according to a bearer type of a target bearer corresponding to the bearer ID, each protocol sublayer function undergone by the target bearer, and an end point protocol sublayer function of the target bearer, where the routing information includes: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
In some other embodiments, optionally, for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
Optionally, the parsing module includes:
a third determining submodule, configured to determine whether the MAC PDU carries a MAC CE or a MAC SDU according to the first field in the MAC subheader of the MAC PDU;
a second obtaining sub-module, configured to obtain, if the first field indicates that the MAC PDU carries a MAC SDU, a MAC SDU carried by the MAC PDU according to the third field in the MAC subheader, and obtain a bearer ID according to the second field in the MAC subheader;
a fourth determining submodule, configured to determine, according to the stored information of each bearer, a bearer type of a target bearer corresponding to the bearer ID, each protocol sublayer function body experienced by the target bearer, and an endpoint protocol sublayer function body of the target bearer;
a fifth determining submodule, configured to determine routing information of each MAC SDU in the MAC PDU according to a bearer type of a target bearer corresponding to the bearer ID, each protocol sublayer function undergone by the target bearer, and an end point protocol sublayer function of the target bearer, where the routing information includes: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
Optionally, the type of the bearer ID includes: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
Referring to fig. 11, an embodiment of the present invention further provides a communication device 110, including a processor 111, a memory 112, and a computer program stored in the memory 112 and capable of running on the processor 111, where the computer program when executed by the processor 111 implements each process of the above embodiment of the method for sending MAC PDUs or the method for receiving MAC PDUs, and can achieve the same technical effects, so that repetition is avoided and redundant description is omitted herein.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above-mentioned method for sending MAC PDUs or method for receiving MAC PDUs, and the same technical effects can be achieved, so that repetition is avoided, and details are not repeated here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
The solution in the above embodiment has the following advantages:
1. breaks through the limitation that the layers in the 5G protocol stack cannot be flexibly selected, and realizes flexible expansion of the protocol stack function;
2. by combining RRC signaling configuration and channel carrying, the overhead is almost 0 (Router ID is carried in PDU) on the basis of ensuring flexibility;
3. the MAC PDU with the routing function is built through the unification of the MAC layer, so that zero influence on the physical layer is realized;
4. a protocol stack scheme is set up for the SBA RAN;
5. the wireless slice definition is based on the protocol stack scheme, so that different slices serving the same UE have the same or different protocol stack functions;
6. the foundation is laid for customizing AS layer protocol stack functions according to different service demands in 6G;
7. a protocol stack functional solution is provided for the interaction of data required in the configuration of an AI model or algorithm of an endophytic AI in model training.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims (14)

1. A method for transmitting a media access control protocol data unit MAC PDU, comprising:
the MAC layer receives a media access control service unit (MAC SDU) from each bearer connected with the MAC layer, wherein each bearer has a bearer ID uniformly distributed for all established bearers;
the MAC layer builds an MAC PDU according to the bearing ID of each bearing and the corresponding MAC SDU;
the MAC layer transmits the MAC PDU to a physical layer.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
3. The method of claim 1, wherein the step of determining the position of the substrate comprises,
for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a media access control unit (MAC CE) or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
4. The method of claim 1, wherein the type of bearer ID comprises: a combination of one or more of a logical channel LC, a data radio bearer DRB, a signaling radio bearer SRB, a radio resource control-media access control RRC-MAC direct bearer, a traffic data adaptation protocol-media access control SDAP-MAC direct bearer, and a layer 3user plane-media access control L3UP-MAC direct bearer.
5. A method for receiving a MAC PDU, comprising:
the MAC layer receives MAC PDUs from the physical layer;
the MAC layer analyzes the MAC PDU, and if the MAC sub-header of the MAC PDU is analyzed to contain a bearing ID, the routing information of each MAC SDU in the MAC PDU is determined according to the bearing ID; wherein, the bearer ID is an ID uniformly distributed for all established bearers;
and the MAC layer sends each MAC SDU to an upper layer according to the routing information of each MAC SDU.
6. The method of claim 5, wherein the step of determining the position of the probe is performed,
for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a bearer ID field, a length field, and a format field;
the bearer ID field is configured to indicate a bearer ID of a corresponding bearer;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
7. The method of claim 6 wherein determining routing information for each MAC SDU in the MAC PDU based on the bearer ID comprises:
the MAC layer obtains the bearing ID in the MAC sub-header of the MAC PDU and the MAC SDU carried in the MAC PDU;
the MAC layer determines the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the destination protocol sub-layer functional body of the target bearing according to the stored information of each bearing;
the MAC layer determines routing information of each MAC SDU in the MAC PDU according to the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the terminal protocol sub-layer functional body of the target bearing, wherein the routing information comprises: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
8. The method of claim 5, wherein the step of determining the position of the probe is performed,
for a fixed size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first domain and a second domain;
and/or
For MAC PDUs of non-fixed size, the MAC subheader of the MAC PDU includes the following fields: a first field, a second field, a third field, a length field, and a format field;
the first field is used for indicating whether the MAC PDU carries a MAC CE or a MAC SDU;
the second domain is a bearer ID domain or a MAC CE ID domain, if the first domain indicates that the MAC PDU carries a MAC SDU, the second domain is a bearer ID domain, and if the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
the third field is configured to indicate the number of MAC SDUs;
the length field is used for indicating the length of the MAC SDU;
the format field is used to indicate the size of the length field.
9. The method of claim 8 wherein determining routing information for each MAC SDU in the MAC PDU based on the bearer ID comprises:
the MAC layer determines whether the MAC PDU carries an MAC CE or an MAC SDU according to the first domain in the MAC subheader of the MAC PDU;
if the first domain indicates that the MAC PDU carries a MAC SDU, the MAC layer obtains the MAC SDU carried by the MAC PDU according to the third domain in the MAC subheader, and obtains a bearer ID according to the second domain in the MAC subheader;
the MAC layer determines the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the destination protocol sub-layer functional body of the target bearing according to the stored information of each bearing;
the MAC layer determines routing information of each MAC SDU in the MAC PDU according to the bearing type of the target bearing corresponding to the bearing ID, each protocol sub-layer functional body experienced by the target bearing and the terminal protocol sub-layer functional body of the target bearing, wherein the routing information comprises: the method comprises the steps of bearing type of a target bearing, identification IDs of all protocol sub-layer functional bodies experienced by the target bearing and identification IDs of terminal protocol sub-layer functional bodies of the target bearing.
10. The method of claim 5, wherein the type of bearer ID comprises: LC, DRB, SRB, RRC-MAC-directly connected bearers, SDAP-MAC-directly connected bearers, and L3 UP-MAC-directly connected bearers.
11. A communication device, comprising:
a receiving module, configured to receive a MAC SDU from each bearer connected to a MAC layer, where each bearer has a bearer ID uniformly allocated to all established bearers;
the building module is used for building the MAC PDU according to the bearing ID of each bearing and the corresponding MAC SDU;
and the sending module is used for sending the MAC PDU to a physical layer.
12. A communication device, comprising:
a receiving module for receiving the MAC PDU from the physical layer;
the analyzing module is used for analyzing the MAC PDU, and if the MAC sub-header of the MAC PDU contains the bearer ID, determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, the bearer ID is an ID uniformly distributed for all established bearers;
and the sending module is used for sending each MAC SDU to an upper layer according to the routing information of each MAC SDU.
13. A communication device, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, the program implementing the steps of the method for transmitting a MAC PDU as claimed in any one of claims 1 to 4 when executed by the processor, or the program implementing the steps of the method for receiving a MAC PDU as claimed in any one of claims 5 to 10 when executed by the processor.
14. A computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the transmission method of MAC PDUs according to any one of claims 1 to 4, or which when executed by a processor implements the steps of the transmission method of MAC PDUs according to any one of claims 5 to 10.
CN202210056555.2A 2022-01-18 2022-01-18 MAC PDU transmitting method, receiving method and communication equipment Pending CN116506971A (en)

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