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

Abstract

The present invention provides a MAC PDU sending method, receiving method and communication equipment. The method is based on the flexible connection of the end-to-end wireless link, and realizes the unified numbering of bearers at the MAC layer. When the MAC layer sends or receives the MAC PDU, according to the The above unified number is used to send the data packet to the correct protocol sublayer function body.

Description

MAC PDU sending method, receiving method and communication equipment

technical field

The embodiments of the present invention relate to the technical field of wireless communication, and in particular to a method for sending a MAC PDU, a method for receiving it, and a communication device.

Background technique

In 6G, the SBA RAN (Service Based Architecture Radio Access Network, Service Based Architecture Radio Access Network) solution is proposed. In the SBA RAN solution, a UE (User Equipment, user equipment) can have multiple L3UP (layer 3User Plane, layer 3 user plane)/SDAP (Service Data Adaption Protocol, business data adaptation protocol)/PDCP (Packet Data Convergence Protocol) at the same time , Packet Data Convergence Protocol)/RLC (Radio Link Control, Radio Link Control) protocol function body, such as URLLC (Ultra-Reliable and Low Latency Communications, low-latency high-reliability connection) a L3UP/SDAP/PDCP/RLC protocol function body , eMBB (Enhance Mobile Broadband, enhanced mobile bandwidth) a L3UP/SDAP/PDCP/RLC protocol function body, etc. Therefore, how to send the data packet to the correct protocol sublayer function body at the AS (Access Stratum, access layer) layer is a technical problem that needs to be solved.

Contents of the invention

Embodiments of the present invention provide a MAC PDU sending method, receiving method and communication equipment, which are used to solve the problem of how to send data packets to the correct protocol sublayer function body.

In order to solve the problems of the technologies described above, the present invention is achieved in that:

In the first aspect, the embodiment of the present invention provides a method for sending a MAC PDU, including:

The MAC layer receives a MAC SDU from each bearer connected to the MAC layer, wherein each bearer has a bearer ID uniformly assigned to all established bearers;

The MAC layer constructs a MAC PDU according to the bearer ID of each bearer and the corresponding MAC SDU;

The MAC layer sends the MAC PDU to the physical layer.

Optionally, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: bearer ID field;

and / or

For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field;

Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer;

The length field is used to indicate 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 field and a second field;

and / or

For a MAC PDU of an unfixed 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;

Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field;

The third field is used to indicate the number of the MAC SDU;

The length field is used to indicate 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: a combination of one or more of LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer.

In a second aspect, the embodiment of the present invention provides a method for receiving a MAC PDU, including:

The MAC layer receives the MAC PDU from the physical layer;

The MAC layer parses the MAC PDU, and if it is found that the MAC subheader of the MAC PDU contains a bearer ID, determine the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, the bearer ID It is the uniformly assigned ID for all established bearers;

The MAC layer sends each MAC SDU to the 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: bearer ID field;

and / or

For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field;

Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer;

The length field is used to indicate 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 bearer ID in the MAC subheader of the MAC PDU and the MACSDU carried in the MAC PDU;

The MAC layer determines the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer according to the stored information of each bearer;

The MAC layer determines each of the MAC PDUs according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer. Routing information of the MACSDU, the routing information including: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the identification ID of the terminal protocol sublayer function of the target bearer.

Optionally, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first field and a second field;

and / or

For a MAC PDU of an unfixed 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;

Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field;

The third field is used to indicate the number of the MAC SDU;

The length field is used to indicate 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 a MAC CE or a MAC SDU according to the first field in the MAC subheader of the MAC PDU;

If the first field 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 field in the MAC subheader, and obtains the MAC SDU according to the MAC subheader In the second field in , get the bearer ID;

The MAC layer determines the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer according to the stored information of each bearer;

The MAC layer determines each of the MAC PDUs according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer. Routing information of the MACSDU, the routing information including: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the identification ID of the terminal protocol sublayer function of the target bearer.

Optionally, the type of the bearer ID includes: a combination of one or more of LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer.

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 the MAC layer, wherein each bearer has a bearer ID uniformly assigned to all established bearers;

A constructing module, configured to construct a MAC PDU according to the bearer ID of each bearer and the corresponding MAC SDU;

A sending module, configured to send the MAC PDU to the physical layer.

In a fourth aspect, an embodiment of the present invention provides a communication device, including:

A receiving module, configured to receive MAC PDUs from the physical layer;

A parsing module, configured to parse the MAC PDU, if parsing out that the MAC subheader of the MAC PDU contains a bearer ID, determine the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, the bearer ID is the uniformly assigned ID for all established bearers;

The sending module is used to send each MAC SDU to the upper layer according to the routing information of each MAC SDU.

In the fifth aspect, the embodiment of the present invention provides a communication device, including: a processor, a memory, and a program stored in the memory and operable on the processor, when the program is executed by the processor Realize the steps of the MAC PDU sending method described in the first aspect above, or realize the steps of the MAC PDU receiving method described in the second aspect when the program is 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 on the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned MAC PDU described in the first aspect is implemented. The steps of the sending method, or, when the computer program is executed by the processor, realize the steps of the MAC PDU sending method described in the second aspect above.

In the embodiment of the present invention, based on the flexible connection of the end-to-end wireless link, the unified numbering of bearers is realized at the MAC layer, and when the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct number according to the unified numbering. Protocol sublayer function body.

Description of 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 embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Figure 1 is a functional schematic diagram of the 6G AS layer protocol stack;

FIG. 2 is a schematic diagram of a topological structure of an end-to-end wireless link;

Figure 3-1 is a schematic diagram of a MAC subheader with an R/F/LCID/L field and an 8-bit L field;

Figure 3-2 is a schematic diagram of a MAC subheader with an R/F/LCID/L field and a 16-bit L field;

Figure 3-3 is a schematic diagram of a MAC subheader with an R/LCID domain;

Figure 4-1 is a schematic diagram of DL MAC PDU;

Figure 4-2 is a schematic diagram of UL MAC PDU;

FIG. 5 is a schematic flow diagram of a method for sending a MAC PDU according to an embodiment of the present invention;

FIG. 6-1, FIG. 6-2 and FIG. 6-3 are schematic structural diagrams of a MAC PDU according to an embodiment of the present invention;

FIG. 7-1, FIG. 7-2 and FIG. 7-3 are schematic structural diagrams of MAC PDUs according to another embodiment of the present invention;

FIG. 8 is a schematic 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 another embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The technical content related to the embodiment of the present invention will be firstly described below.

For the design goal of a next-generation mobile communication Lite Network, it is proposed to introduce a user plane function (User Plane, UP) at L3 (Layer 3, Layer 3) for data processing. The UP function (referred to as L3UP) is introduced in the L3 of the AS (Access Stratum, access layer) (the layer 3 protocol of the AS layer in the 5G system only includes the RRC (Radio Resource Control, radio resource control) protocol sublayer). In the 3G/4G/5G system, L3 at the AS layer (terminal side, RRC protocol layer for the network side) has only the control plane (CP, Control Plane), that is, only the RRC protocol layer (or sublayer), and the RRC protocol layer Complete the radio resource control function.

Redesign the L2 packet processing (Packet Processing) function of the AS layer. The new L2 packet processing function is mainly to undertake the characteristics of the upper-layer service data, and combine the channel characteristics of the lower-layer air interface to form a QoS that takes both air interface and service characteristics into account. Quality of Service, service quality) indicators and operations.

For the L3 of the AS layer, in addition to the traditional radio resource control (RRC, L3 CP) function, a new L3 UP function is added to process data packets. As shown in Figure 1.

The UP (User Plane, user plane) of the L3 of the AS layer has a function of sending an IP (Internet Protocol, Internet Protocol) packet for the first time or more than once. With the introduction of the UP function of L3, the existing data processing functions of L2 need to be redefined.

The introduction of L3 UP brings a new method of data processing at the AS layer, which can realize seamless and lossless forwarding of data when the user is moving.

Figure 2 shows the 6G flexible protocol stack solution. In this solution, there are multiple corresponding relationships among different protocol sublayers, and multiple functional bodies can exist in the protocol sublayer with the same function at the same time. In the present invention, all the links connected to the MAC protocol sublayer function body can be uniformly numbered, and then traverse to the position of the L3 protocol stack sublayer function body, and all the protocol sublayer function bodies experienced and the connection between them are called A point-to-point wireless link. The end-to-end wireless link ID is the value of the unified number of the link connected to the MAC protocol sublayer function body, such as 0-n links connected to the MAC identified in FIG. 2 .

The concept of the MAC PDU involved in the present invention will be described below.

A MAC PDU consists of one or more MAC sub-PDUs. Each MAC sub-PDU consists of one of the following:

MAC subheader only (including padding);

MAC sub-header and MAC SDU (Media Access Control Service Data Unit, Media Access Control Service Data Unit);

MAC sub-header and MAC CE (Media Access Control Control Element, Media Access Control Control Unit);

MAC subheader and padding.

Among them, the size of the MAC SDU is different.

Each MAC subheader corresponds to MAC SDU, MAC CE or padding.

Please refer to Figure 3-1, Figure 3-2 and Figure 3-3, the MAC sub-header except for MAC CE of fixed size, padding and MAC SDU containing UL CCCH consists of four header fields R/F/LCID /L composition. The MAC subheader for MAC CE of fixed size, padding and MAC SDU containing UL CCCH consists of two header fields R/LCID.

MAC CEs are put together. As shown in Figure 4-1, place the DL MAC sub-PDU with MAC CE before any MAC sub-PDU with MAC SDU and MAC sub-PDU with padding. As shown in Figure 4-2, the UL MAC sub-PDU with MAC CE is placed after all MAC sub-PDUs with MAC SDUs, and before the MAC sub-PDUs with padding in the MAC PDU. The size of padding can be zero.

Each MAC entity can transmit at most one MAC PDU per TB (transport block).

The MAC subheader consists of the following fields:

LCID: logical channel ID field identifier, corresponding to the logical channel instance of the MAC SDU or corresponding to the type of MAC CE or padding. Each MAC subheader has an LCID field. LCID field size is 6 bits;

L: length field, indicating the length (bytes) of the corresponding MAC SDU or variable-sized MAC CE. Each MAC subheader has an L field, except for MAC subheaders corresponding to fixed-size MAC CEs, padding, and MAC SDUs containing UL CCCH. The size of the L field is represented by the F field;

F: format field, indicating the size of the length field. Each MAC subheader has an F field, except for MAC subheaders corresponding to fixed-size MAC CEs, padding, and MAC SDUs containing UL CCCH. The size of the F field is 1 bit. A value of 0 represents 8 bits of the Length field. A value of 1 indicates 16 bits of the length field;

R: Reserved bit, set to "0".

The MAC subheader is octal aligned.

In order to solve the problem of how to send the data packet to the correct protocol sublayer function body, as shown in Figure 5, the embodiment of the present invention provides a method for sending a MAC PDU, including:

Step 51: The MAC layer receives a MAC SDU from each bearer connected to the MAC layer, wherein each bearer has a bearer ID (Bearer ID) uniformly assigned to all established bearers;

The bearer includes a signaling bearer and a data bearer, that is, the signaling bearer and the data bearer are numbered uniformly, and a bearer ID is uniformly assigned to the bearer when the bearer is established. For example, the bearer ID may be uniformly recorded as: Bearer ID=0, 1, 2, . . .

In the embodiment of the present invention, when each bearer is established, the following information can be configured for the bearer:

bearer ID (Bearer ID);

The type of bearer, including signaling bearer (SB, signaling bearer of RRC-MAC direct connection), SRB (Signaling Radio Bearer, signaling radio bearer, in order to ensure compatibility, it is the existing signaling radio bearer of the system, SRB0/1 /2/3, etc.), DRB (Data Radio Bearer, data radio bearer, in order to ensure compatibility, it is the existing data radio bearer of the system, DRB0/1,...,63, etc.), data bearer (DB, SDAP-MAC direct Connected or L3UP-MAC directly connected data bearer), a total of four types;

Carry the protocol layer functions that need to be established, including each protocol sublayer function body experienced in the path, and the protocol sublayer function body of the final connection;

The QoS (Quality of Service) requirements (QoS parameters) that the carried data packets are required to meet at the MAC layer, such as the number of retransmissions, the recommended MCS (Modulation and coding scheme, modulation and coding scheme) level, whether to allow transmission failure (after multiple retransmissions) transmission), whether each data packet needs to be sent concurrently by multiple processes, the HARQ (Hybrid Automatic Repeat reQuest, Hybrid Automatic Repeat Request) or HARQ process mode (synchronous or asynchronous) used by each data packet, and/or whether it is allowed to be preempted, etc. .

In this embodiment of the present invention, a bearer may also be referred to as a link or a link, or a channel carrying a MAC SDU.

Step 52: The MAC layer constructs a MAC PDU according to the bearer ID of each bearer and the corresponding MAC SDU;

Step 53: the MAC layer sends the MAC PDU to the physical layer.

In the embodiment of the present invention, based on the flexible connection of the end-to-end wireless link, the unified numbering of bearers is realized at the MAC layer, and when the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct number according to the unified numbering. Protocol sublayer function body.

In the embodiment of the present invention, the format of the MAC PDU needs to be defined, so as to realize 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 can be extended to bear the bearer ID, so as to be compatible with the format of the existing MAC PDU.

Referring to Figure 6-1, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: bearer ID field and reserved bit (R field). Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer.

As shown in Figure 6-2 and Figure 6-3, for a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field (L field), format field (F field) and reserved bits (R domain);

Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer;

The length field is used to indicate the length of the MAC SDU;

The format field is used to indicate the size of the length field.

The format of the above 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 remains unchanged. Only the LCID (locale identifier) field is newly defined. ID (Bearer ID) replaces LCID.

In this embodiment of the present invention, optionally, the type of the bearer ID includes: LC (Logical Channel, logical channel), DRB (Data Radio Bearer, data radio bearer), SRB (Signaling Radio Bearer, signaling radio bearer), A combination of one or more of RRC-MAC directly connected bearer (SB), SDAP-MAC directly connected bearer or L3UP-MAP directly connected bearer (DB).

When the type is LC, it means that the bearer at this time is an existing bearer form of 5G, that is, LCH (logical channel)-RB (Radio Bearer, radio bearer) and so on. When the type is SB or DB, it is the bearer of RRC-MAC direct connection or SDAP (Service Data Adaptation 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 can be reconstructed to bear the bearer ID.

Please refer to Figure 7-1. For a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: the first field (D/C field), the second field (bearer ID/MAC CE ID field) and reserved bit(R field);

Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field.

Please refer to Figure 7-2 and Figure 7-3, for a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: the first field (D/C field), the second field (bearer ID/MAC CE ID domain), third domain (SDU Num domain), length domain (L domain) and format domain (F domain);

Wherein, the first field (D/C field) is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field;

The third field (SDU Num field) is used to indicate the number of the MAC SDU; corresponding to the number of L fields;

The length field (L field) is used to indicate the length of the MAC SDU; each L field pair uses the length of a MAC SDU;

The format field (F field) is used to indicate the size of the length field. A value of 0 or 1 indicates two length values of the L field, such as 8 bits and 16 bits; or 16 bits and 24 bits; or 16 bits and 32 bits, etc. The specific combination can be defined according to the length of the service data packet.

In this embodiment of the present invention, optionally, the type of the bearer ID includes: one of LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer or a combination of more.

The MAC CE ID identifies the type of MAC CE.

Please refer to FIG. 8, the embodiment of the present invention also provides a method for receiving a MAC PDU, including:

Step 81: The MAC layer receives the MAC PDU from the physical layer;

Step 82: The MAC layer parses the MAC PDU, and if it is found that the MAC subheader of the MAC PDU contains a bearer ID, determine the routing information of each MAC SDU in the MAC PDU according to the bearer ID; , the bearer ID is an ID uniformly assigned to all established bearers;

The bearer includes a signaling bearer and a data bearer, that is, the signaling bearer and the data bearer are numbered uniformly, and a bearer ID is uniformly assigned to the bearer when the bearer is established. For example, the bearer ID may be uniformly recorded as: Bearer ID=0, 1, 2, . . .

Step 83: The MAC layer sends each MAC SDU to the upper layer according to the routing information of each MAC SDU.

In the embodiment of the present invention, based on the flexible connection of the end-to-end wireless link, the unified numbering of bearers is realized at the MAC layer, and when the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct number according to the unified numbering. Protocol sublayer function body.

In the embodiment of the present invention, the format of the MAC PDU needs to be defined, so as to realize 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 can be extended to bear the bearer ID, so as to be compatible with the format of the existing MAC PDU.

Optionally, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: bearer ID field;

and / or

For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field;

Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer;

The length field is used to indicate 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: a combination of one or more of LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer.

Based on the format of the above 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 bearer ID in the MAC subheader of the MAC PDU and the MAC SDU carried in the MAC PDU;

Step 82a2: The MAC layer determines the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer of the target bearer according to the stored information of each bearer function body;

Step 82a3: The MAC layer determines the MAC PDU according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer The routing information of each MAC SDU in the MAC SDU, the routing information includes: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the ID of the terminal protocol sublayer function of the target bearer Identification ID.

In other embodiments of the present invention, the format of the MAC PDU can be reconstructed to bear the bearer ID.

Optionally, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first field and a second field;

and / or

For a MAC PDU of an unfixed 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;

Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field;

The third field is used to indicate the number of the MAC SDU;

The length field is used to indicate 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 above 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 MAC CE or MAC SDU according to the first field in the MAC subheader of the MAC PDU;

Step 82b2: If the first field 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 field in the MAC subheader, and according to The second field in the MAC subheader obtains the bearer ID;

Step 82b3: The MAC layer determines the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer of the target bearer according to the stored information of each bearer function body;

Step 82b4: The MAC layer determines the MAC PDU according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer The routing information of each MAC SDU in the MAC SDU, the routing information includes: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the ID of the terminal protocol sublayer function of the target bearer Identification ID.

Please refer to FIG. 9, the embodiment of the present invention also provides a communication device 90, including:

The receiving module 91 is configured to receive a MAC SDU from each bearer connected to the MAC layer, wherein each bearer has a bearer ID uniformly allocated for all established bearers;

A constructing module 92, configured to construct a MAC PDU according to the bearer ID of each bearer and the corresponding MAC SDU;

A sending module 93, configured to send the MAC PDU to the physical layer.

In some embodiments, optionally, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: bearer ID field;

and / or

For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field;

Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer;

The length field is used to indicate 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 field and a second field;

and / or

For a MAC PDU of an unfixed 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;

Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field;

The third field is used to indicate the number of the MAC SDU;

The length field is used to indicate 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: a combination of one or more of LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer.

Please refer to FIG. 10 , the embodiment of the present invention also 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, if parsing out that the MAC subheader of the MAC PDU contains a bearer ID, determine the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, The bearer ID is an ID uniformly assigned to all established bearers;

The sending module 103 is configured to send each MAC SDU to the 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: bearer ID field;

and / or

For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field;

Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer;

The length field is used to indicate 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 the bearer ID in the MAC subheader of the MAC PDU and the MAC SDU carried in the MAC PDU;

The first determination submodule is configured to determine the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function body experienced by the target bearer, and the terminal protocol subclass of the target bearer according to the stored information of each bearer Layer function body;

The second determining submodule is configured to determine the MAC according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer The routing information of each MAC SDU in the PDU, the routing information includes: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer The identification ID of .

In some other embodiments, optionally, for a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first field and a second field;

and / or

For a MAC PDU of an unfixed 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;

Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU;

The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the The MAC PDU carries a MAC CE, and the second field is a MAC CE ID field;

The third field is used to indicate the number of the MAC SDU;

The length field is used to indicate 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 MAC CE or MAC SDU according to the first field in the MAC subheader of the MAC PDU;

The second obtaining submodule is configured to obtain the MAC SDU carried by the MAC PDU according to the third field in the MAC subheader if the first field indicates that the MAC PDU carries a MAC SDU, and Obtain a bearer ID according to the second field in the MAC subheader;

The fourth determining submodule is configured to determine the bearer type of the target bearer corresponding to the bearer ID, the function bodies of each protocol sublayer experienced by the target bearer, and the terminal protocol sub-layer of the target bearer according to the stored information of each bearer. Layer function body;

The fifth determining submodule is configured to determine the MAC according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer The routing information of each MAC SDU in the PDU, the routing information includes: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer The identification ID of .

Optionally, the type of the bearer ID includes: a combination of one or more of LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer.

Please refer to FIG. 11 , an embodiment of the present invention also provides a communication device 110, including a processor 111, a memory 112, and a computer program stored in the memory 112 and operable on the processor 111. The computer program is executed by the processor 111 implements each process of the above MAC PDU sending method or MAC PDU receiving method embodiment during execution, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned embodiment of the MAC PDU sending method or the MAC PDU receiving method is realized Each process, and can achieve the same technical effect, in order to avoid repetition, will not repeat them here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The scheme in the foregoing embodiments has the following advantages:

1. It breaks through the limitation that the middle layers of the 5G protocol stack cannot be flexibly selected, and realizes the flexible expansion and contraction of the protocol stack functions;

2. Through the combination of RRC signaling configuration and road portability, on the basis of ensuring flexibility, the overhead is almost 0 (Router ID must be carried in the PDU);

3. Through the unified formation of MAC PDUs with routing functions at the MAC layer, zero impact on the physical layer is realized;

4. Created a protocol stack solution for SBA RAN;

5. Lay the foundation for the definition of wireless slices --- through this protocol stack solution, different slices serving the same UE can have the same or different protocol stack functions;

6. Lay the foundation for customizing AS layer protocol stack functions according to different business needs in 6G;

7. Provide a protocol stack function solution for the configuration of the AI model or algorithm of the endogenous AI, and the interaction of the data required in the model training.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in various embodiments of the present invention.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, without departing from the gist of the present invention and the protection scope of the claims, many forms can also be made, all of which belong to the protection of the present invention.

Claims (14)

1. A sending method of a medium access control protocol data unit MAC PDU, characterized in that, comprising: The MAC layer receives a medium access control service unit MAC SDU from each bearer connected to the MAC layer, wherein each bearer has a bearer ID uniformly allocated for all established bearers; The MAC layer constructs a MAC PDU according to the bearer ID of each bearer and the corresponding MAC SDU; The MAC layer sends the MAC PDU to the physical layer. 2. The method of claim 1, wherein, For a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: bearer ID field; and / or For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field; Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer; The length field is used to indicate 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, For a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first field and a second field; and / or For a MAC PDU of an unfixed 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; Wherein, the first field is used to indicate whether the MAC PDU carries a medium access control control element MAC CE or a MAC SDU; The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the What the MAC PDU carries is a MAC CE, and the second field is a MAC CE ID field; The third field is used to indicate the number of the MAC SDU; The length field is used to indicate the length of the MAC SDU; The format field is used to indicate the size of the length field. 4. The method according to claim 1, wherein the type of the bearer ID includes: logical channel LC, data radio bearer DRB, signaling radio bearer SRB, radio resource control-media access control RRC-MAC direct A combination of one or more of the bearer of the connection, the bearer of the service data adaptation protocol-media access control SDAP-MAC direct connection, and the bearer of the layer 3 user plane-media access control L3UP-MAC direct connection. 5. A method for receiving a MAC PDU, comprising: The MAC layer receives the MAC PDU from the physical layer; The MAC layer parses the MAC PDU, and if it is found that the MAC subheader of the MAC PDU contains a bearer ID, determine the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, the bearer ID It is the uniformly assigned ID for all established bearers; The MAC layer sends each MAC SDU to the upper layer according to the routing information of each MAC SDU. 6. The method of claim 5, wherein, For a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: bearer ID field; and / or For a MAC PDU with an unfixed size, the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field and format field; Wherein, the bearer ID field is used to indicate the bearer ID of the corresponding bearer; The length field is used to indicate the length of the MAC SDU; The format field is used to indicate the size of the length field. 7. The method according to claim 6, wherein determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID comprises: The MAC layer obtains the bearer ID in the MAC subheader of the MAC PDU and the MACSDU carried in the MAC PDU; The MAC layer determines the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer according to the stored information of each bearer; The MAC layer determines each of the MAC PDUs according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer. The routing information of the MAC SDU, the routing information includes: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the identification ID of the terminal protocol sublayer function of the target bearer . 8. The method of claim 5, wherein, For a fixed-size MAC PDU, the MAC subheader of the MAC PDU includes the following fields: a first field and a second field; and / or For a MAC PDU of an unfixed 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; Wherein, the first field is used to indicate whether the MAC PDU carries MAC CE or MAC SDU; The second field is a bearer ID field or a MAC CE ID field. If the first field indicates that the MAC PDU carries a MAC SDU, the second field is a bearer ID field. If the first field indicates that the What the MAC PDU carries is a MAC CE, and the second field is a MAC CE ID field; The third field is used to indicate the number of the MAC SDU; The length field is used to indicate the length of the MAC SDU; The format field is used to indicate the size of the length field. 9. The method according to claim 8, wherein determining the routing information of each MAC SDU in the MAC PDU according to the bearer ID comprises: The MAC layer determines 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; If the first field 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 field in the MAC subheader, and obtains the MAC SDU according to the MAC subheader In the second field in , get the bearer ID; The MAC layer determines the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer according to the stored information of each bearer; The MAC layer determines each of the MAC PDUs according to the bearer type of the target bearer corresponding to the bearer ID, each protocol sublayer function experienced by the target bearer, and the terminal protocol sublayer function of the target bearer. The routing information of the MAC SDU, the routing information includes: the bearer type of the target bearer, the identification ID of each protocol sublayer function experienced by the target bearer, and the identification ID of the terminal protocol sublayer function of the target bearer . 10. The method according to claim 5, wherein the type of the bearer ID includes: LC, DRB, SRB, RRC-MAC directly connected bearer, SDAP-MAC directly connected bearer, and L3UP-MAC directly connected bearer A combination of one or more of the bearers. 11. A communication device, characterized in that it comprises: A receiving module, configured to receive a MAC SDU from each bearer connected to the MAC layer, wherein each bearer has a bearer ID uniformly assigned to all established bearers; A constructing module, configured to construct a MAC PDU according to the bearer ID of each bearer and the corresponding MAC SDU; A sending module, configured to send the MAC PDU to the physical layer. 12. A communication device, characterized in that it comprises: A receiving module, configured to receive MAC PDUs from the physical layer; A parsing module, configured to parse the MAC PDU, if parsing out that the MAC subheader of the MAC PDU contains a bearer ID, determine the routing information of each MAC SDU in the MAC PDU according to the bearer ID; wherein, the bearer ID is the uniformly assigned ID for all established bearers; The sending module is used to send each MAC SDU to the upper layer according to the routing information of each MAC SDU. 13. A communication device, characterized in that it comprises: a processor, a memory, and a program stored on the memory and operable on the processor, when the program is executed by the processor, it realizes the The steps of the method for sending the MAC PDU described in any one of claims 1 to 4, or, when the program is executed by the processor, realize the method for receiving the MAC PDU described in any one of claims 5 to 10 step. 14. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is realized. The steps of the method for sending the MAC PDU, or, when the computer program is executed by the processor, the steps of the method for sending the MAC PDU according to any one of claims 5 to 10 are realized.