WO2023138580A1 - Mac pdu发送方法、接收方法及通信设备 - Google Patents

Mac pdu发送方法、接收方法及通信设备 Download PDF

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Publication number
WO2023138580A1
WO2023138580A1 PCT/CN2023/072632 CN2023072632W WO2023138580A1 WO 2023138580 A1 WO2023138580 A1 WO 2023138580A1 CN 2023072632 W CN2023072632 W CN 2023072632W WO 2023138580 A1 WO2023138580 A1 WO 2023138580A1
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Prior art keywords
mac
bearer
field
mac pdu
pdu
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PCT/CN2023/072632
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English (en)
French (fr)
Inventor
孙军帅
王莹莹
李娜
赵芸
孙欣
张慧敏
刘光毅
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2023138580A1 publication Critical patent/WO2023138580A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22Parsing or analysis of headers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/11Allocation or use of connection identifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation

Definitions

  • the embodiments of the present disclosure relate to the technical field of wireless communication, and in particular, to a MAC PDU sending method, a receiving method, and a communication device.
  • a service-based architecture radio access network (Service Based Architecture Radio Access Network, SBA RAN) solution is proposed.
  • a user equipment User Equipment, UE
  • L3UP layer 3 user plane
  • L3UP service data adaptation protocol
  • SDAP Service Data Adaptation Protocol
  • Embodiments of the present disclosure 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.
  • an embodiment of the present disclosure 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 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.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field;
  • the MAC subhead of the MAC PDU includes the following fields: bearer ID field, length field and format field;
  • 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 MAC subheader of the MAC PDU includes the following fields: a first field and a second field;
  • the MAC subhead 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 to indicate whether the MAC PDU carries MAC CE or 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. 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 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.
  • 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.
  • the embodiment of the present disclosure 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, if parsing out that the MAC subheader of the MAC PDU contains a 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 allocated for all established bearers;
  • the MAC layer sends each MAC SDU to the upper layer according to the routing information of each MAC SDU.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field;
  • the MAC subhead of the MAC PDU includes the following fields: bearer ID field, length field and format field;
  • 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.
  • 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 MAC SDU 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 the routing information of each MAC SDU in 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 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.
  • the MAC subheader of the MAC PDU includes the following fields: a first field and a second field;
  • the MAC subhead 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 to indicate whether the MAC PDU carries MAC CE or 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. 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 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.
  • 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;
  • the MAC layer obtains the MAC SDU carried by the MAC PDU according to the third field in the MAC subheader, and obtains a bearer ID according to the second field in the MAC subheader;
  • 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 the routing information of each MAC SDU in 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 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.
  • 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.
  • an embodiment of the present disclosure provides a communication device, including:
  • a receiving module configured to receive MAC SDUs from each bearer connected to the MAC layer, wherein each bearer has a bearer ID uniformly allocated for all bearers established;
  • a building module configured to form a MAC PDU according to the bearer ID of each of the bearers and the corresponding MAC SDU;
  • a sending module configured to send the MAC PDU to the physical layer.
  • an embodiment of the present disclosure provides a communication device, including:
  • a receiving module configured to receive MAC PDUs from the physical layer
  • the parsing module is used 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 allocated 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.
  • an embodiment of the present disclosure provides a communication device, including: a processor, a memory, and a program stored on the memory and operable on the processor, when the program is executed by the processor, the steps of the MAC PDU sending method described in the first aspect above are implemented, or, when the program is executed by the processor, the steps of the MAC PDU receiving method described in the second aspect above are implemented.
  • an embodiment of the present disclosure 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 steps of the MAC PDU sending method described in the first aspect above are implemented, or, when the computer program is executed by the processor, the steps of the MAC PDU sending method described in the second aspect above are implemented.
  • the unified numbering of bearers is implemented at the MAC layer.
  • the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct protocol sublayer function body according to the unified numbering.
  • 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 in an embodiment of the present disclosure
  • 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 disclosure
  • FIG. 7-1, FIG. 7-2 and FIG. 7-3 are schematic structural diagrams of MAC PDUs according to another embodiment of the present disclosure.
  • FIG. 8 is a schematic flow diagram of a method for receiving a MAC PDU according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure.
  • Fig. 11 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure.
  • L3UP User Plane, UP
  • AS Access Stratum
  • RRC Radio Resource Control
  • the Packet Processing function of Layer 2 (L2) of the AS layer is redesigned.
  • the new L2 packet processing function is mainly to undertake the characteristics of the upper-layer business data, and combine the channel characteristics of the lower-layer air interface to form a Quality of Service (QoS) index and operation that takes into account both the air interface and business characteristics.
  • QoS Quality of Service
  • TCP Transmission Control Protocol
  • UDP User Datagram Protocol
  • NAS Non-Access Stratum
  • UPF User plane Function
  • MAC Media Access Control
  • PHY Port Physical Layer, which is the port physical layer
  • Uu is the wireless interface.
  • the user plane (User Plane, UP) of the L3 of the AS layer has the function of sending the Internet Protocol (Internet Protocol, IP) packet for the first time or more than once.
  • IP Internet Protocol
  • 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.
  • 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.
  • all the links connected to the MAC protocol sublayer functions can be uniformly numbered, and then traversed to the location of the L3 protocol stack sublayer functions in turn, and all the protocol sublayer functions experienced and the connections between them 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 connected to the MAC protocol sublayer function body, such as 0-n links connected to the MAC identified in FIG. 2 .
  • a MAC PDU consists of one or more MAC sub-PDUs.
  • Each MAC sub-PDU consists of one of the following:
  • MAC sub-header and MAC media access control service data unit Media Access Control Service Data Unit (SDU);
  • MAC sub-header and media access control control unit Media Access Control Element, MAC CE
  • the size of the MAC SDU is different.
  • Each MAC subheader corresponds to MAC SDU, MAC CE or padding.
  • the MAC subheader consists of four header fields R/F/LCID/L.
  • the MAC subheader for MAC CE of fixed size, padding and MAC SDU containing UL CCCH consists of two header fields R/LCID.
  • the MAC CE is put together.
  • the downlink (Downlink, DL) MAC sub-PDU with MAC CE is placed before any MAC sub-PDU with MAC SDU and MAC sub-PDU with padding.
  • 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 Transport Block (TB).
  • LCID Logical channel ID domain identifier
  • ID is Identity, which is the identifier, corresponding to the logical channel instance of the MAC SDU or corresponding to the MAC CE or filling type.
  • 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-size 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 domain is represented by the F domain;
  • 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 for 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.
  • the embodiment of the present disclosure 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;
  • bearer ID Bearer ID
  • 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.
  • the following information can be configured for the bearer:
  • Bearer ID (Bearer ID);
  • Bearer type including signaling bearer (SB, signaling bearer for 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 connection or L3UP-MAC direct connection data bearer), a total of four types;
  • the QoS (Quality of Service) requirements (QoS parameters) that the data packets carried at the MAC layer are required to meet, 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), whether each data packet needs to be sent concurrently. / or whether it is allowed to be preempted, etc.
  • 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.
  • the flexible connection based on the end-to-end wireless link is implemented at the MAC layer
  • the unified number of the bearer when the MAC layer sends or receives the MAC PDU, sends the data packet to the correct protocol sublayer function body according to the unified number.
  • 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.
  • the format of the existing MAC PDU can be extended to bear the bearer ID, so as to be compatible with the relevant MAC PDU format.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field and reserved bit (R field).
  • bearer ID field is used to indicate the bearer ID of the corresponding bearer.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field, length field (L field), format field (F field) and reserved bit (R field);
  • 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 setting identifier) field is newly defined, and the bearer ID (Bearer ID) is used instead of the LCID.
  • 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), RRC-MAC directly connected bearer (SB), SDAP-MAC directly connected bearer or L3UP-MAP directly connected bearer (DB).
  • LC Logical Channel, logical channel
  • DRB Data Radio Bearer, data radio bearer
  • SRB Signaling radio bearer
  • RRC-MAC directly connected bearer SB
  • SDAP-MAC directly connected bearer or L3UP-MAP directly connected bearer (DB).
  • the bearer at this time is the existing bearer form of 5G, that is, LCH (logical channel)-RB (Radio Bearer, radio bearer), etc.
  • LCH logical channel
  • RB Radio Bearer, radio bearer
  • 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.
  • the format of the MAC PDU may be reconstructed to bear the bearer ID.
  • the MAC sub- The header includes the following fields: a first field (D/C field), a second field (bearer ID/MAC CE ID field) and a reserved bit (R field);
  • the first field is used to indicate whether the MAC PDU carries MAC CE or 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. If the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain.
  • 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), the third field (SDU Num field), the length field (L field) and the format field (F field);
  • the first domain (D/C domain) is used to indicate whether the MAC PDU carries MAC CE or 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. If the first domain indicates that the MAC PDU carries a MAC CE, the second domain is a MAC CE ID domain;
  • the third domain (SDU Num domain) is used to indicate the number of the MAC SDU; corresponding to the number of L domains;
  • the length domain (L domain) is used to indicate the length of the MAC SDU; each L domain 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.
  • the bearer ID type 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.
  • MAC CE ID identifies the type of MAC CE.
  • the embodiment of the present disclosure 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, if the MAC PDU is parsed
  • the MAC subheader includes a bearer ID, and the routing information of each MAC SDU in the MAC PDU is determined according to the bearer ID; wherein, the bearer ID is an ID uniformly allocated for 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.
  • Step 83 The MAC layer sends each MAC SDU to the upper layer according to the routing information of each MAC SDU.
  • the unified numbering of bearers is implemented at the MAC layer.
  • the MAC layer sends or receives the MAC PDU, the data packet is sent to the correct protocol sublayer function body according to the unified numbering.
  • 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.
  • the format of the existing MAC PDU can be extended to bear the bearer ID, so as to be compatible with the relevant MAC PDU format.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field;
  • the MAC subhead of the MAC PDU includes the following fields: bearer ID field, length field and format field;
  • 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 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.
  • 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 function of the target bearer according to the stored information of each bearer;
  • Step 82a3 The MAC layer determines the routing information of each MAC SDU in 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 destination protocol sublayer function of the target bearer.
  • 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 destination protocol sublayer function of the target bearer.
  • the format of the MAC PDU may be reconstructed to bear the bearer ID.
  • the MAC subheader of the MAC PDU includes the following fields: a first field and a second field;
  • the MAC subhead 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 to indicate whether the MAC PDU carries MAC CE or 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. 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 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.
  • 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 MAC SDU, and obtain the bearer ID according to the second field in the MAC subheader;
  • 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 function of the target bearer according to the stored information of each bearer;
  • Step 82b4 The MAC layer determines the routing information of each MAC SDU in 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 destination protocol sublayer function of the target bearer.
  • 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 destination protocol sublayer function of the target bearer.
  • an embodiment of the present disclosure also provides a communication device 90, including:
  • the receiving module 91 is configured to receive MAC SDUs from each bearer connected to the MAC layer, wherein each bearer has a bearer ID uniformly allocated for all established bearers;
  • a building module 92 configured to set up a MAC PDU according to the bearer ID of each of the bearers and the corresponding MAC SDU;
  • Sending module 93 is used for sending described MAC PDU to physical layer.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field;
  • the MAC subhead of the MAC PDU includes the following fields: bearer ID field, length field and format field;
  • 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 MAC subheader of the MAC PDU includes the following fields: a first field and a second field;
  • the MAC subhead 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 to indicate whether the MAC PDU carries MAC CE or MAC SDUs
  • 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. 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 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.
  • 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.
  • the embodiment of the present disclosure also provides a communication device 100, including:
  • Receiving module 101 for receiving MAC PDU from physical layer
  • the parsing module 102 is used to parse the MAC PDU. If the MAC subheader of the MAC PDU is parsed out to include 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 allocated for 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.
  • the MAC subheader of the MAC PDU includes the following fields: bearer ID field;
  • the MAC subhead of the MAC PDU includes the following fields: bearer ID field, length field and format field;
  • 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 parsing module includes:
  • the first obtaining submodule is used 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 corresponding bearer ID according to the stored information of each bearer.
  • the second determination submodule is used to determine the routing information of each MAC SDU in the MAC PDU according to 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 sublayer function body of the target bearer.
  • the MAC subheader of the MAC PDU includes the following fields: a first field and a second field;
  • the MAC subhead 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 to indicate whether the MAC PDU carries MAC CE or 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. 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 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.
  • the parsing module includes:
  • the third determining submodule is used 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;
  • 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, 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 fifth determination submodule is used to determine the routing information of each MAC SDU in 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 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.
  • 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.
  • an embodiment of the present disclosure 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 When the computer program is executed by the processor 111, it realizes the above-mentioned processes of the MAC PDU sending method or the MAC PDU receiving method embodiment, and can achieve the same technical effect. In order to avoid repetition, details are not repeated here.
  • Embodiments of the present disclosure also provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned MAC PDU sending method or MAC PDU receiving method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
  • 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 computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), and includes several instructions to make a terminal (which can be a mobile phone, computer, server, air conditioner, or network equipment, etc.) execute the methods described in various embodiments of the present disclosure.

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Abstract

本公开提供一种MAC PDU发送方法、接收方法及通信设备,该方法包括:MAC层从连接MAC层的每个承载上接收MAC SDU,其中,每个承载具有为建立的所有承载统一分配的承载ID;MAC层根据各个承载的承载ID以及对应的MAC SDU,组建MAC PDU;MAC层将MAC PDU发送到物理层。

Description

MAC PDU发送方法、接收方法及通信设备
相关申请的交叉引用
本申请主张在2022年01月18日在中国提交的中国专利申请No.202210056555.2的优先权,其全部内容通过引用包含于此。
技术领域
本公开实施例涉及无线通信技术领域,尤其涉及一种MAC PDU发送方法、接收方法及通信设备。
背景技术
在第六代移动通信系统(6th Generation Mobile Communication Technology,6G)中,提出了服务化架构的无线接入网(Service Based Architecture Radio Access Network,SBA RAN)方案。在SBA RAN方案中,一个用户设备(User Equipment,UE)可以同时有多个层3用户面(layer 3 User Plane,L3UP)/业务数据适应协议(Service Data Adaption Protocol,SDAP)/分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)/无线链路控制(Radio Link Control,RLC)协议功能体,比如低时延高可靠连接(Ultra-Reliable and Low Latency Communications,URLLC)一个L3UP/SDAP/PDCP/RLC协议功能体,增强移动带宽(Enhance Mobile Broadband,eMBB)一个L3UP/SDAP/PDCP/RLC协议功能体等。因而,如何在接入层(Access Stratum,AS)层,将数据包发送到正确的协议子层功能体,是需要解决的技术问题。
发明内容
本公开实施例提供一种MAC PDU发送方法、接收方法及通信设备,用于解决如何将数据包发送到正确的协议子层功能体的问题。
为了解决上述技术问题,本公开是这样实现的:
第一方面,本公开实施例提供了一种MAC PDU的发送方法,包括:
MAC层从连接所述MAC层的每个承载上接收MAC SDU,其中,每个所述承载具有为建立的所有承载统一分配的承载ID;
所述MAC层根据各个所述承载的承载ID以及对应的MAC SDU,组建MAC PDU;
所述MAC层将所述MAC PDU发送到物理层。
可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
其中,所述承载ID域用于指示对应的承载的承载ID;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
所述第三域用于指示所述MAC SDU的个数;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,所述承载ID的类型包括:LC、DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
第二方面,本公开实施例提供了一种MAC PDU的接收方法,包括:
MAC层从物理层接收MAC PDU;
所述MAC层解析所述MAC PDU,若解析出所述MAC PDU的MAC子头中包含承载ID,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息;其中,承载ID是为建立的所有承载统一分配的ID;
所述MAC层根据每个MAC SDU的路由信息,将每个MAC SDU发送至上层。
可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
其中,所述承载ID域用于指示对应的承载的承载ID;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息包括:
所述MAC层获得所述MAC PDU的MAC子头中的承载ID以及所述MAC PDU中携带的MAC SDU;
所述MAC层根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
所述MAC层根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
所述第三域用于指示所述MAC SDU的个数;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息包括:
所述MAC层根据所述MAC PDU的MAC子头中的所述第一域,确定所述MAC PDU携带的是MAC CE还是MAC SDU;
若所述第一域指示所述MAC PDU携带的是MAC SDU,所述MAC层根据所述MAC子头中的所述第三域,得到所述MAC PDU携带的MAC SDU,并根据MAC子头中的所述第二域,得到承载ID;
所述MAC层根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
所述MAC层根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
可选的,所述承载ID的类型包括:LC、DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
第三方面,本公开实施例提供了一种通信设备,包括:
接收模块,用于从连接MAC层的每个承载上接收MAC SDU,其中,每个所述承载具有为建立的所有承载统一分配的承载ID;
组建模块,用于根据各个所述承载的承载ID以及对应的MAC SDU,组建MAC PDU;
发送模块,用于将所述MAC PDU发送到物理层。
第四方面,本公开实施例提供了一种通信设备,包括:
接收模块,用于从物理层接收MAC PDU;
解析模块,用于解析所述MAC PDU,若解析出所述MAC PDU的MAC子头中包含承载ID,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息;其中,承载ID是为建立的所有承载统一分配的ID;
发送模块,用于根据每个MAC SDU的路由信息,将每个MAC SDU发送至上层。
第五方面,本公开实施例提供了一种通信设备,包括:处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序,所述程序被所述处理器执行时实现上述第一方面所述的MAC PDU的发送方法的步骤,或者,所述程序被所述处理器执行时实现上述第二方面所述的MAC PDU的接收方法的步骤。
第六方面,本公开实施例提供了一种计算机可读存储介质,所述计算机可读存储介质上存储有计算机程序,所述计算机程序被处理器执行时实现上述第一方面所述的MAC PDU的发送方法的步骤,或者,所述计算机程序被处理器执行时实现上述第二方面所述的MAC PDU的发送方法的步骤。
在本公开实施例中,基于端到端无线链路的柔性连接,在MAC层实现承载的统一编号,MAC层在发送或者接收MAC PDU时,根据所述统一编号,将数据包发送给正确的协议子层功能体。
附图说明
通过阅读下文优选实施方式的详细描述,各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的, 而并不认为是对本公开的限制。而且在整个附图中,用相同的参考符号表示相同的部件。在附图中:
图1为6G的AS层协议栈功能示意图;
图2为端到端无线链路的拓扑结构示意图;
图3-1为具有R/F/LCID/L域、且L域为8比特的MAC子头的示意图;
图3-2为具有R/F/LCID/L域、且L域为16比特的MAC子头的示意图;
图3-3为具有R/LCID域的MAC子头的示意图;
图4-1为DL MACPDU的示意图;
图4-2为UL MACPDU的示意图;
图5为本公开实施例的MAC PDU的发送方法的流程示意图;
图6-1、图6-2和图6-3为本公开一实施例的MAC PDU的结构示意图;
图7-1、图7-2和图7-3为本公开另一实施例的MAC PDU的结构示意图;
图8为本公开实施例的MAC PDU的接收方法的流程示意图;
图9为本公开一实施例的通信设备的结构示意图;
图10为本公开另一实施例的通信设备的结构示意图;
图11为本公开又一实施例的通信设备的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本公开一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本公开保护的范围。
下面首先对本公开实施例相关的技术内容进行说明。
面向下一代移动通信的极简网络(Lite Network)的设计目标,提出了在层3(Layer 3,L3)引入用户面功能(User Plane,UP)进行数据处理。在接入层(Access Stratum,AS)的L3(5G系统中AS层的3层协议只包括无线资源控制(Radio Resource Control,RRC)协议子层)中引入UP功能(记为L3UP)。在3G/4G/5G系统中,处于AS层(终端侧,对于网络侧为RRC协议层)的L3只有控制面(Control Plane,CP),即只有RRC协议层(或者 子层),RRC协议层完成无线资源控制功能。
对于AS层的层2(Layer 2,L2)的包处理(Packet Processing)功能进行重新设计,新的L2的包处理功能主要是承接上层业务数据的特征,并结合低层空口的信道特长,形成兼顾空口和业务特征的服务质量(Quality of Service,QoS)指标和操作。
对于AS层的L3,除去传统的无线资源控制(RRC,L3的CP)功能外,新增L3的UP功能对数据包进行处理。如图1所示。其中,TCP即Transmission Control Protocol,为传输控制协议,UDP即User Datagram Protocol,为用户数据包协议,NAS即Non-Access Stratum,为非接入层,UPF即User plane Function,为用户面功能,MAC即Media Access Control,为媒体接入控制,PHY即Port Physical Layer,为端口物理层,Uu为无线接口。
AS层的L3的用户面(User Plane,UP)具有对互联网协议(Internet Protocol,IP)包的第一次或者多于一次的发送功能。随着L3的UP功能的引入,L2已有的数据处理功能需要进行重新定义。
L3 UP的引入,带来了AS层数据处理的新方式,可以在用户移动时,实现数据的无缝和无损的前转。
图2给出了6G柔性协议栈方案。在该方案中,不同协议子层之间的关系有多种对应关系,并且相同功能的协议子层可以同时存在多个功能体。本公开中,可以把所有连接MAC协议子层功能体的链接进行统一编号,然后依次遍历到L3的协议栈子层功能体位置,经历的所有协议子层功能体以及之间的连接称之为一条端到端无线链路。该端到端无线链路ID即为连接MAC协议子层功能体的链接的统一编号的取值,如图2所标识的0~n条连接MAC的链路。
下面对本公开涉及的MAC协议数据单元(Protocol Data Unit,PDU)的概念进行说明。
一个MAC PDU由一个或多个MAC子PDU组成。每个MAC子PDU由以下内容之一组成:
仅MAC子头(subheader)(包括填充(padding));
MAC子头和MAC媒体接入控制服务数据单元(Media Access Control  Service Data Unit,SDU);
MAC子头和媒体接入控制控制单元(Media Access Control Control Element,MAC CE);
MAC子头和填充。
其中,MAC SDU的大小不一。
每个MAC子头对应于MAC SDU、MAC CE或填充。
请参考图3-1、图3-2和图3-3,除用于固定大小的MAC CE、填充和包含上行(Uplink,UL)公共控制信道(Common Control Channel,CCCH)的MAC SDU之外的MAC子头由四个报头域R/F/LCID/L组成。用于固定大小的MAC CE、填充和包含UL CCCH的MAC SDU的MAC子头由两个报头域R/LCID组成。
MAC CE被放在一起。如图4-1所示,将具有MAC CE的下行(Downlink,DL)MAC子PDU放置在具有MAC SDU的任何MAC子PDU和具有填充的MAC子PDU之前。如图4-2所示,带有MAC CE的UL MAC子PDU放置在带有MAC SDU的所有MAC子PDU之后,MAC PDU中带有填充的MAC子PDU之前。填充的大小可以为零。
每个MAC实体每传输块(Transport Block,TB)最多可传输一个MAC PDU。
MAC子头由以下域组成:
LCID:逻辑信道ID域标识,ID即Identity,为标识,对应MAC SDU的逻辑信道实例或对应MAC CE或填充的类型。每个MAC子头有一个LCID域。LCID域大小为6位;
L:长度域,表示相应MAC SDU或可变大小MAC CE的长度(字节)。每个MAC子头有一个L域,但与固定大小的MAC CE、填充和包含UL CCCH的MAC SDU相对应的MAC子头除外。L域的大小由F域表示;
F:格式域,表示长度域的大小。每个MAC子头都有一个F域,但与固定大小的MAC CE、填充和包含UL CCCH的MAC SDU相对应的MAC子头除外。F域的大小为1位。值0表示长度域的8位。值1表示长度域的16位;
R:保留位,设置为“0”。
MAC子头是八进制对齐的。
为解决如何将数据包发送到正确的协议子层功能体的问题,如图5所示,本公开实施例提供一种MAC PDU的发送方法,包括:
步骤51:MAC层从连接所述MAC层的每个承载上接收MAC SDU,其中,每个所述承载具有为建立的所有承载统一分配的承载ID(Bearer ID);
所述承载包括信令承载和数据承载,也即,信令承载和数据承载统一编号,在承载建立时为承载统一分配承载ID。例如,承载ID可以统一记为:Bearer ID=0,1,2,…。
本公开实施例中,每个承载建立时,可以为该承载配置以下信息:
承载ID(Bearer ID);
承载的类型,包括信令承载(SB,RRC-MAC直连的信令承载),SRB(Signaling Radio Bearer,信令无线承载,为了保证兼容性,为系统已有的信令无线承载,SRB0/1/2/3等),DRB(Data Radio Bearer,数据无线承载,为了保证兼容性,为系统已有的数据无线承载,DRB0/1,…,63等),数据承载(DB,SDAP-MAC直连或L3UP-MAC直连的数据承载),共计四种类型;
承载需要建立的协议层功能,包括路径中经历的每一个协议子层功能体、最终连接的协议子层功能体;
承载的数据包在MAC层要求达到的QoS(服务质量)要求(QoS参数),比如重传次数、建议MCS(Modulation and coding scheme,调制和编码方案)等级、是否允许发送失败(经过多次重传)、每个数据包是否需要并发多进程发送、每个数据包采用的HARQ(Hybrid Automatic Repeat reQuest,混合自动重传请求)或者HARQ进程的模式(同步或者异步)和/或是否允许被抢占等。
本公开实施例中,承载也可以称为链接或者链路或者承载MAC SDU的通道等。
步骤52:所述MAC层根据各个所述承载的承载ID以及对应的MAC SDU,组建MAC PDU;
步骤53:所述MAC层将所述MAC PDU发送到物理层。
在本公开实施例中,基于端到端无线链路的柔性连接,在MAC层实现 承载的统一编号,MAC层在发送或者接收MAC PDU时,根据所述统一编号,将数据包发送给正确的协议子层功能体。
本公开实施例中,需要对MAC PDU的格式进行定义,以实现按照端到端无线链路的多路径的数据包传输。
本公开的一些实施例中,可以对已有的MAC PDU的格式进行扩展,以用来承载承载ID,从而兼容相关的MAC PDU格式。
请参考图6-1,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域和保留位(R域)。其中,所述承载ID域用于指示对应的承载的承载ID。
图6-2和图6-3,对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域(L域)、格式域(F域)和保留位(R域);
其中,所述承载ID域用于指示对应的承载的承载ID;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
上述MAC PDU的格式是基于已有的MAC PDU的格式直接进行扩展,不更改已有MAC PDU的格式,MAC PDU的总体格式不变,只对LCID(区域设置标识符)域进行全新定义,使用承载ID(Bearer ID)取代LCID。
本公开实施例中,可选的,所述承载ID的类型包括:LC(Logical Channel,逻辑信道)、DRB(Data Radio Bearer,数据无线承载)、SRB(Signaling Radio Bearer,信令无线承载)、RRC-MAC直连的承载(SB)、SDAP-MAC直连的承载或L3UP-MAP直连的承载(DB)中的一个或多个的组合。
当类型LC时,表示此时的承载为5G已有的承载形式,即LCH(逻辑信道)-RB(Radio Bearer,无线承载)等。当类型为SB、DB时,为RRC-MAC直连或者SDAP(Service Data Adaption Protocol,业务数据适应协议)-MAC直连或者L3UP-MAC直连的承载。
本公开的另外一些实施例中,可以重构MAC PDU的格式,以用来承载承载ID。
请参考图7-1,对于固定大小的MAC PDU,所述MAC PDU的MAC子 头包括以下域:第一域(D/C域)、第二域(承载ID/MAC CE ID域)和保留位(R域);
其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域。
请参考图7-2和图7-3,对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域(D/C域)、第二域(承载ID/MAC CE ID域)、第三域(SDU Num域)、长度域(L域)和格式域(F域);
其中,所述第一域(D/C域)用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
所述第三域(SDU Num域)用于指示所述MAC SDU的个数;与L域的数量对应;
所述长度域(L域)用于指示所述MAC SDU的长度;每个L域对用一个MAC SDU的长度;
所述格式域(F域)用于指示所述长度域的大小。取值0或者1,指示L域的两个长度取值,比如8比特和16比特;或者16比特和24比特;或者16比特和32比特等。具体的组合可以根据业务数据包的长度定义。
本公开实施例中,可选的,所述承载ID的类型包括:LC、DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
MAC CE ID标识MAC CE的类型。
请参考图8,本公开实施例还提供一种MAC PDU的接收方法,包括:
步骤81:MAC层从物理层接收MAC PDU;
步骤82:所述MAC层解析所述MAC PDU,若解析出所述MAC PDU 的MAC子头中包含承载ID,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息;其中,承载ID是为建立的所有承载统一分配的ID;
所述承载包括信令承载和数据承载,也即,信令承载和数据承载统一编号,在承载建立时为承载统一分配承载ID。例如,承载ID可以统一记为:Bearer ID=0,1,2,…。
步骤83:所述MAC层根据每个MAC SDU的路由信息,将每个MAC SDU发送至上层。
在本公开实施例中,基于端到端无线链路的柔性连接,在MAC层实现承载的统一编号,MAC层在发送或者接收MAC PDU时,根据所述统一编号,将数据包发送给正确的协议子层功能体。
本公开实施例中,需要对MAC PDU的格式进行定义,以实现按照端到端无线链路的多路径的数据包传输。
本公开的一些实施例中,可以对已有的MAC PDU的格式进行扩展,以用来承载承载ID,从而兼容相关的MAC PDU格式。
可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
其中,所述承载ID域用于指示对应的承载的承载ID;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,所述承载ID的类型包括:LC、DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
基于上述MAC PDU的格式,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息包括:
步骤82a1:所述MAC层获得所述MAC PDU的MAC子头中的承载ID以及所述MAC PDU中携带的MAC SDU;
步骤82a2:所述MAC层根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
步骤82a3:所述MAC层根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
本公开的另外一些实施例中,可以重构MAC PDU的格式,以用来承载承载ID。
可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
所述第三域用于指示所述MAC SDU的个数;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
基于上述MAC PDU的格式,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息包括:
步骤82b1:所述MAC层根据所述MAC PDU的MAC子头中的所述第一域,确定所述MAC PDU携带的是MAC CE还是MAC SDU;
步骤82b2:若所述第一域指示所述MAC PDU携带的是MAC SDU,所述MAC层根据所述MAC子头中的所述第三域,得到所述MAC PDU携带的 MAC SDU,并根据MAC子头中的所述第二域,得到承载ID;
步骤82b3:所述MAC层根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
步骤82b4:所述MAC层根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
请参考图9,本公开实施例还提供一种通信设备90,包括:
接收模块91,用于从连接MAC层的每个承载上接收MAC SDU,其中,每个所述承载具有为建立的所有承载统一分配的承载ID;
组建模块92,用于根据各个所述承载的承载ID以及对应的MAC SDU,组建MAC PDU;
发送模块93,用于将所述MAC PDU发送到物理层。
一些实施例中,可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
其中,所述承载ID域用于指示对应的承载的承载ID;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
另外一些实施例中,可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC  SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
所述第三域用于指示所述MAC SDU的个数;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,所述承载ID的类型包括:LC、DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
请参考图10,本公开实施例还提供一种通信设备100,包括:
接收模块101,用于从物理层接收MAC PDU;
解析模块102,用于解析所述MAC PDU,若解析出所述MAC PDU的MAC子头中包含承载ID,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息;其中,承载ID是为建立的所有承载统一分配的ID;
发送模块103,用于根据每个MAC SDU的路由信息,将每个MAC SDU发送至上层。
一些实施例中,可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
其中,所述承载ID域用于指示对应的承载的承载ID;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,所述解析模块包括:
第一获得子模块,用于获得所述MAC PDU的MAC子头中的承载ID以及所述MAC PDU中携带的MAC SDU;
第一确定子模块,用于根据存储的各承载的信息,确定所述承载ID对应 的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
第二确定子模块,用于根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
另外一些实施例中,可选的,对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
和/或
对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
所述第三域用于指示所述MAC SDU的个数;
所述长度域用于指示所述MAC SDU的长度;
所述格式域用于指示所述长度域的大小。
可选的,所述解析模块包括:
第三确定子模块,用于根据所述MAC PDU的MAC子头中的所述第一域,确定所述MAC PDU携带的是MAC CE还是MAC SDU;
第二获得子模块,用于若所述第一域指示所述MAC PDU携带的是MAC SDU,根据所述MAC子头中的所述第三域,得到所述MAC PDU携带的MAC SDU,并根据MAC子头中的所述第二域,得到承载ID;
第四确定子模块,用于根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
第五确定子模块,用于根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
可选的,所述承载ID的类型包括:LC、DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
请参考图11,本公开实施例还提供一种通信设备110,包括处理器111,存储器112,存储在存储器112上并可在所述处理器111上运行的计算机程序,该计算机程序被处理器111执行时实现上述MAC PDU的发送方法或MAC PDU的接收方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。
本公开实施例还提供一种计算机可读存储介质,所述计算机可读存储介质上存储计算机程序,所述计算机程序被处理器执行时实现上述MAC PDU的发送方法或MAC PDU的接收方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。其中,所述的计算机可读存储介质,如只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等。
上述实施例中的方案具有以下优点:
1、突破了5G协议栈中层间无法灵活选择局限,实现了协议栈功能的柔性伸缩;
2、通过RRC信令配置和随路携带相结合,在保证了柔性灵活性的基础上,开销几乎为0(PDU中要携带Router ID);
3、通过MAC层的统一组建路由功能的MAC PDU,实现了对物理层的零影响;
4、为SBA RAN打下了协议栈方案;
5、为无线切片的定义打下了基础---通过该协议栈方案,可以使服务于同一个UE的不同切片具有相同或者不同的协议栈功能;
6、为6G中根据不同的业务需求定制化AS层协议栈功能打下了基础;
7、为内生AI的AI模型或者算法的配置、模型训练中所需数据的交互提供了协议栈功能的解决方案。
需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中,包括若干指令用以使得一台终端(可以是手机,计算机,服务器,空调器,或者网络设备等)执行本公开各个实施例所述的方法。
上面结合附图对本公开的实施例进行了描述,但是本公开并不局限于上述的具体实施方式,上述的具体实施方式仅仅是示意性的,而不是限制性的,本领域的普通技术人员在本公开的启示下,在不脱离本公开宗旨和权利要求所保护的范围情况下,还可做出很多形式,均属于本公开的保护之内。

Claims (14)

  1. 一种媒体接入控制协议数据单元MAC PDU的发送方法,包括:
    MAC层从连接所述MAC层的每个承载上接收媒体接入控制服务单元MAC SDU,其中,每个所述承载具有为建立的所有承载统一分配的承载ID;
    所述MAC层根据各个所述承载的承载ID以及对应的MAC SDU,组建MAC PDU;
    所述MAC层将所述MAC PDU发送到物理层。
  2. 根据权利要求1所述的方法,其中,
    对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
    和/或
    对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
    其中,所述承载ID域用于指示对应的承载的承载ID;
    所述长度域用于指示所述MAC SDU的长度;
    所述格式域用于指示所述长度域的大小。
  3. 根据权利要求1所述的方法,其中,
    对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
    和/或
    对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
    其中,所述第一域用于指示所述MAC PDU携带的是媒体接入控制控制单元MAC CE还是MAC SDU;
    所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
    所述第三域用于指示所述MAC SDU的个数;
    所述长度域用于指示所述MAC SDU的长度;
    所述格式域用于指示所述长度域的大小。
  4. 根据权利要求1所述的方法,其中,所述承载ID的类型包括:数据无线承载DRB、信令无线承载SRB、无线资源控制-媒体接入控制RRC-MAC直连的承载、业务数据适应协议-媒体接入控制SDAP-MAC直连的承载和层3用户面-媒体接入控制L3UP-MAC直连的承载中的一个或多个的组合。
  5. 一种MAC PDU的接收方法,包括:
    MAC层从物理层接收MAC PDU;
    所述MAC层解析所述MAC PDU,若解析出所述MAC PDU的MAC子头中包含承载ID,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息;其中,承载ID是为建立的所有承载统一分配的ID;
    所述MAC层根据每个MAC SDU的路由信息,将每个MAC SDU发送至上层。
  6. 根据权利要求5所述的方法,其中,
    对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域;
    和/或
    对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:承载ID域、长度域和格式域;
    其中,所述承载ID域用于指示对应的承载的承载ID;
    所述长度域用于指示所述MAC SDU的长度;
    所述格式域用于指示所述长度域的大小。
  7. 根据权利要求6所述的方法,其中,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息包括:
    所述MAC层获得所述MAC PDU的MAC子头中的承载ID以及所述MAC PDU中携带的MAC SDU;
    所述MAC层根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
    所述MAC层根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
  8. 根据权利要求5所述的方法,其中,
    对于固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域和第二域;
    和/或
    对于不固定大小的MAC PDU,所述MAC PDU的MAC子头包括以下域:第一域、第二域、第三域、长度域和格式域;
    其中,所述第一域用于指示所述MAC PDU携带的是MAC CE还是MAC SDU;
    所述第二域为承载ID域或MAC CE ID域,若所述第一域指示所述MAC PDU携带的是MAC SDU,所述第二域为承载ID域,若所述第一域指示所述MAC PDU携带的是MAC CE,所述第二域为MAC CE ID域;
    所述第三域用于指示所述MAC SDU的个数;
    所述长度域用于指示所述MAC SDU的长度;
    所述格式域用于指示所述长度域的大小。
  9. 根据权利要求8所述的方法,其中,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息包括:
    所述MAC层根据所述MAC PDU的MAC子头中的所述第一域,确定所述MAC PDU携带的是MAC CE还是MAC SDU;
    若所述第一域指示所述MAC PDU携带的是MAC SDU,所述MAC层根据所述MAC子头中的所述第三域,得到所述MAC PDU携带的MAC SDU,并根据MAC子头中的所述第二域,得到承载ID;
    所述MAC层根据存储的各承载的信息,确定所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体;
    所述MAC层根据所述承载ID对应的目标承载的承载类型、所述目标承载经历的各个协议子层功能体、所述目标承载的终点协议子层功能体,确定所述MAC PDU中的各个MAC SDU的路由信息,所述路由信息包括:目标承载的承载类型、所述目标承载经历的各个协议子层功能体的身份识别ID、所述目标承载的终点协议子层功能体的身份识别ID。
  10. 根据权利要求5所述的方法,其中,所述承载ID的类型包括:DRB、SRB、RRC-MAC直连的承载、SDAP-MAC直连的承载和L3UP-MAC直连的承载中的一个或多个的组合。
  11. 一种通信设备,包括:
    接收模块,用于从连接MAC层的每个承载上接收MAC SDU,其中,每个所述承载具有为建立的所有承载统一分配的承载ID;
    组建模块,用于根据各个所述承载的承载ID以及对应的MAC SDU,组建MAC PDU;
    发送模块,用于将所述MAC PDU发送到物理层。
  12. 一种通信设备,包括:
    接收模块,用于从物理层接收MAC PDU;
    解析模块,用于解析所述MAC PDU,若解析出所述MAC PDU的MAC子头中包含承载ID,根据所述承载ID确定所述MAC PDU中的每个MAC SDU的路由信息;其中,承载ID是为建立的所有承载统一分配的ID;
    发送模块,用于根据每个MAC SDU的路由信息,将每个MAC SDU发送至上层。
  13. 一种通信设备,包括:处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序,所述程序被所述处理器执行时实现如权利要求1至4中任一项所述的MAC PDU的发送方法的步骤,或者,所述程序被所述处理器执行时实现如权利要求5至10中任一项所述的MAC PDU的接收方法的步骤。
  14. 一种计算机可读存储介质,所述计算机可读存储介质上存储有计算机程序,所述计算机程序被处理器执行时实现如权利要求1至4中任一项所述的MAC PDU的发送方法的步骤,或者,所述计算机程序被处理器执行时 实现如权利要求5至10中任一项所述的MAC PDU的发送方法的步骤。
PCT/CN2023/072632 2022-01-18 2023-01-17 Mac pdu发送方法、接收方法及通信设备 WO2023138580A1 (zh)

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