WO2011012040A1

WO2011012040A1 - Method for encapsulating relay-medium access control protocol data unit (r-mac pdu) and method, system and device for transmitting r-mac pdu

Info

Publication number: WO2011012040A1
Application number: PCT/CN2010/074871
Authority: WO
Inventors: 杨瑾; 梁枫; 毕峰; 袁明; 吴栓栓
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-07-29
Filing date: 2010-06-30
Publication date: 2011-02-03
Also published as: CN101990304A; CN101990304B

Abstract

A method for encapsulating a Relay-Medium Access Control Protocol Data Unit (R-MAC PDU), and a method, system and device for transmitting the R-MAC PDU are provided. The R-MAC PDU includes a R-MAC PDU header and a R-MAC PDU payload. A sender encapsulates the MAC control element(s) (CEs) belonging to the relay node(s) (RNs) and/or the m Relay-User Equipment(s) (R-UEs) and the MAC Service Data Unit(s) (SDUs) belonging to the RN(s) and/or the k R-UE(s) in the R-MAC PDU payload, where m and k are integers and m,k≥1. An indicating information is encapsulated in the R-MAC PDU header, and indicates the RN(s) or the R-UE(s) which the MAC CE(s) and the MAC SDU(s) in the R-MAC PDU payload separately belong to. The present invention can improve the resource utilization ratio of a backhaul link and enables eNB to schedule and control a backhaul link and a access link effectively.

Description

R-MAC PDU encapsulation method, transmission method, system and device

Technical field

The present invention relates to the field of mobile communications, and in particular, to an R-MAC PDU encapsulation method, a transmission method, a system and a device in a mobile communication system including a relay station (RN: Relay Node).

Background technique

Currently, the development of mobile communications requires support for higher transmission rates, better signal coverage, and higher resource utilization. In order to achieve high transmission rates, communication systems will use higher frequency band transmission signals, but on the other hand, high frequencies will introduce large path losses, which in turn will affect network coverage. In order to effectively improve network coverage, improve network capacity and resource utilization, relay technology has become a hot research direction of mobile communication systems.

In a mobile communication system that introduces a relay station, a UE (User Equipment, user equipment or terminal) has two ways to communicate with an eNB (evolved Node B), and the other is a direct communication method in a traditional mobile network. One is to implement communication between the UE and the eNB through the relay service of the RN, as shown in FIG. The link between the eNB and the RN is called a Backhaul Link, and the link between the RN and the UE it serves is called an Access Link. The RN receives the service through the relay. The UE is called R-UE.

From the perspective of resource scheduling, the RN can be divided into two modes: distributed scheduling and centralized scheduling. The distributed scheduling is applicable to the RNs with the capability of the independent scheduling resources. The eNB allocates certain resources to the RN. The RN can independently schedule the resources to provide services for users in the RN coverage. In the centralized scheduling mode, The eNB uniformly allocates resources, and the RN itself has no authority to allocate resources, and can only perform relay services according to the scheduling of the eNB. In the actual system, distributed scheduling or centralized scheduling can be selected according to the selected RN function and network requirements.

In the MAC (Medium Access Control) layer of the LTE (Long Term Evolution) system, data between the eNB and the UE is related to the MAC layer in units of MAC SDU (Service Data Unit). CE (Control Element, Control Element) The PDUs are encapsulated into MAC PDUs (Protocol Data Units) according to certain rules, and then the MAC PDUs are passed to the lower layer for further processing and transmission.

The format of the MAC PDU of the LTE system is as shown in FIG. 2: The whole is divided into two parts: a MAC PDU header (header) and a MAC PDU payload (payload). In a MAC PDU, the header part is in front and then the payload is received. section. The MAC PDU header contains multiple MAC PDU subheaders (Subheaders). The payload part contains several MAC SDUs and MAC CEs. It may also include certain padding bytes introduced according to the length specification of the MAC PDU. MAC in the payload. The CE is in front, followed by the MAC SDU, and finally the possible Padding ("opt" in the figure means optional). Each MAC PDU subheader corresponds to one MAC SDU, MAC CE or Padding in the payload, indicating information about the corresponding MAC SDU or MAC CE, or indicating Padding. The order in which the MAC PDU subheaders are arranged in the MAC PDU header corresponds to the order in which the MAC CE, MAC SDU, and Padding are arranged in the payload.

The MAC PDU subheaders are divided into two categories, which are divided into subheaders for indicating the MAC SDU. The format is shown in Figure 3a and Figure 3b, and the subheaders used to indicate MAC CE or Padding are shown in Figure 4. The sub-header format shown in FIG. 3 and FIG. 4 is expressed in the form of a 1-byte line, and the sub-header for the MAC SDU can occupy 2 bytes or 3 bytes, and the sub-header for MAC CE or Padding occupies 1 byte. The meaning of each indicator is:

R - lbit, reserved, no indication meaning;

E - lbit, used to indicate that this subheader is followed by another MAC PDU subheader, or the beginning of a payload;

LCID - 5bit, indicating the related attributes of the MAC SDU or MAC CE corresponding to this subheader, or indicating Padding;

F - lbit, used to indicate that the length of the L area is 7 bits or 15 bits.

L - 7bit (as shown in Figure 3a) or 15bit (as shown in Figure 3b) is used to indicate the length of the corresponding MAC SDU.

The subheader for the MAC SDU can be represented as an R/R/E/LCID/F/L subheader, and the subheader for MAC CE or Padding can be represented as an R/R/E/LCID subheader. Since the length of the MAC CE information is fixed, the L area indicating the length is not required in the subhead corresponding to the MAC CE, and further need not be needed. An F indicator indicating the length of the L region.

The format of the foregoing MAC PDU is used in the LTE system for processing data between the eNB and the UE and related MAC layer control information at the MAC layer, and the eNB encapsulates the data of each UE and the related MAC control information into a MAC PDU, and transmits the data to the lower layer. After further processing, the UE sends the data to the eNB and the related MAC control information is encapsulated into a MAC PDU, which is further processed and sent to the eNB.

In a centralized scheduling relay system, the MAC PDU transmitted between the eNB and the RN on the Backhaul Link may include RN and N (N > 1 , N is an integer) R-UE data and respective MAC control information. . The existing MAC PDU format of LTE cannot fully adapt to the requirements of data and related control transmission between the eNB and the RN. On the one hand, the original MAC PDU is directed to the same UE's data and related control. All the information contained in one MAC PDU belongs to the same UE, and the transmission on the Backhaul Link may contain N R-UE data and corresponding The MAC CE, and the Backhaul Link data between the RN and the eNB and the corresponding MAC CE, the original MAC PDU format cannot simultaneously contain and distinguish information indicating the RN and the N R-UEs. On the other hand, if the data and MAC CE of multiple RNs under the RN and the data and MAC CE between the RN and the eNB are separately encapsulated and transmitted in the format of the MAC PDU on the Backhaul Link, the resources of the Backhaul Link cannot be obtained. Effective use, and can not be effectively scheduled transmission according to the data requirements of each UE or RN.

For a centralized scheduling relay system, the eNB not only needs to schedule and control the transmission related to the RN, but also needs to control the related transmission of its subordinate R-UE through the relay forwarding scheduling of the RN, that is, the transmission needs to be related to the RN on the Backhaul Link. The data and the corresponding MAC CE, as well as the R-UE related data and the corresponding MAC CE. Summary of the invention

The technical problem to be solved by the present invention is to provide an R-MAC PDU encapsulation method, a transmission method, a system and a device, improve resource utilization of a backhaul link, and implement effective scheduling control of the Backhaul Link and the Access Link by the eNB.

To solve the above technical problem, the present invention provides a method for encapsulating a medium access control MAC protocol data unit PDU for a backhaul link, where the MAC PDU for the backhaul link is below Referred to as R-MAC PDU, the method includes:

The R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the sender will belong to a MAC Control Element (CE) of the Relay Station (RN) and/or m Relay Subordinate Terminals (R-UEs), and A MAC Service Data Unit (SDU) belonging to the RN and/or k R-UEs is encapsulated in the payload of the R-MAC PDU, m, k > l and is an integer, and at least the indication information is encapsulated in the R-MAC PDU header. The indication information is used to indicate an RN or an R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload respectively belong.

To solve the above technical problem, the present invention further provides a method for sending an R-MAC PDU, where the method includes:

When the sender sends a MAC CE belonging to the RN and/or m R-UEs to the receiver on the backhaul link, and a MAC SDU belonging to the RN and/or k R-UEs, m, k > 1 and is an integer. Encapsulating the one or more MAC CEs and the one or more MAC SDUs into an R-MAC PDU, and sending the information to the receiver through the physical layer, where the sender carries the indication information in the R-MAC PDU, And indicating an RN or an R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU belong respectively.

To solve the above technical problem, the present invention further provides a method for receiving an R-MAC PDU, including:

The receiver receives the R-MAC PDU sent by the sender, the R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the receiver decapsulates a plurality of Rs from the R-MAC PDU header a MAC PDU subheader that decapsulates one or more MAC CEs and one or more MAC SDUs from the R-MAC PDU payload according to an indication of each R-MAC PDU subheader, and according to the R-MAC PDU The indication information carried in the header is learned by the RN or the R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload respectively belong.

To solve the above technical problem, the present invention also provides a transmission system of an R-MAC PDU, including a transmitting device and a receiving device, where:

The transmitting device is configured to: CEs belonging to the RN and/or m R-UEs, and belonging to the RN And/or the MAC SDUs of the k R-UEs are encapsulated in the R-MAC PDU payload, m, k > 1 and are integers, at least the indication information is encapsulated in the R-MAC PDU header, and the encapsulated R-MAC is to be encapsulated. Sending a PDU to the receiving device;

The receiving device is configured to: receive an R-MAC PDU sent by the sender, decapsulate the indication information from the R-MAC PDU header, and decapsulate the MAC CE and the MAC SDU from the R-MAC PDU payload, and according to the The indication information determines an RN or an R-UE to which the MAC CE and the MAC SDU belong respectively.

To solve the above technical problem, the present invention further provides an apparatus for transmitting an R-MAC PDU, including a packaging unit and a sending unit, where:

The encapsulation unit is configured to: encapsulate one or more MAC CEs belonging to the RN and/or m R-UEs, and one or more MAC SDUs belonging to the RN and/or k R-UEs in the R-MAC PDU In the payload, m, k > 1 and is an integer, and is used to encapsulate the indication information in the R-MAC PDU header;

The sending unit is configured to: send the encapsulated R-MAC PDU.

In order to solve the above technical problem, the present invention further provides an apparatus for receiving an R-MAC PDU, including a decapsulation unit and a node confirmation unit, where:

The decapsulation unit is configured to: decapsulate the indication information from the R-MAC PDU header; decapsulate one or more MAC CEs from the R-MAC PDU payload, and one or more MAC SDUs ;

The node confirming unit is configured to: determine node information of the RN or the R-UE to which the MAC CE and the MAC SDU belong respectively according to the decapsulation information decapsulated by the decapsulation unit.

The method, the transmission method, the system and the device for the R-MAC PDU of the backhaul link proposed by the invention realize the effective processing and packaging of the data and related control information on the Backhaul Link, thereby improving the utilization of the Backhaul Link resource and being flexible. Effective scheduling control transmission, more effectively meet the R-UE and RN requirements for data delay, data volume, etc., improve the fairness of system resource scheduling Sexual effects. DRAWINGS

1 is a schematic diagram of a structure of a relay network;

2 is a structural diagram of a MAC PDU of an LTE system;

3a and 3b are schematic diagrams showing a subheader structure corresponding to a MAC SDU in a MAC PDU transmitted between an eNB and a UE;

4 is a schematic diagram of a sub-header structure corresponding to MAC CE or Padding in a MAC PDU transmitted between an eNB and a UE;

Figure 5 is a schematic structural view of the system and apparatus of the present invention;

6 is a schematic structural diagram of an R-MAC PDU according to method 1 of the present invention;

7a and 7b are schematic diagrams showing the structure of a sub-header corresponding to a MAC SDU in an R-MAC PDU according to the method 1 of the present invention, wherein the Node ID occupies 16 bits;

8a and 8b are schematic diagrams showing the structure of a sub-header corresponding to a MAC SDU in an R-MAC PDU according to the method 1 of the present invention, wherein the Node ID occupies 8 bits;

9a and FIG. 9b are schematic diagrams of a sub-header corresponding to a MAC CE in an R-MAC PDU according to method 1 of the present invention, wherein a Node ID occupies 8 bits or 16 bits;

10 is a schematic structural diagram of an R-MAC PDU according to method 2 of the present invention;

11a and FIG. 1 ib are schematic diagrams of the structure of the S subheader in the R-MAC PDU of the method 2 of the present invention, where the Node ID area can occupy 8 bits or 16 bits;

12 is a schematic structural diagram of an R-MAC PDU according to method 3 of the present invention;

13a and FIG. 13b are schematic diagrams showing a sub-header structure corresponding to a MAC SDU in an R-MAC PDU according to method 3 of the present invention, wherein the Node ID occupies 16 bits;

14a and FIG. 14b are schematic diagrams showing a sub-header structure corresponding to a MAC SDU in an R-MAC PDU according to method 3 of the present invention, wherein the Node ID occupies 8 bits;

15a and FIG. 15b are schematic diagrams showing a sub-header structure corresponding to a MAC SDU in an R-MAC PDU according to method 3 of the present invention, which does not include a Node ID area; 16a and FIG. 16b are schematic diagrams showing the structure of a MAC CE subheader in an R-MAC PDU according to method 3 of the present invention, wherein the Node ID occupies 8 bits or 16 bits;

17 is a schematic diagram of a sub-head structure corresponding to a MAC CE in an R-MAC PDU according to method 3 of the present invention, and does not include a Node ID area;

18 is a structural diagram of an R-MAC PDU in Embodiment 1 of the present invention;

19 is a structural diagram of an R-MAC PDU in Embodiment 2 of the present invention;

20 is a structural diagram of an R-MAC PDU in Embodiment 3 of the present invention;

21 is a structural diagram of an R-MAC PDU in Embodiment 4 of the present invention;

Figure 22 is a structural diagram of an R-MAC PDU in Embodiment 5 of the present invention;

Figure 23 is a structural diagram of an R-MAC PDU in Embodiment 6 of the present invention. detailed description

In order to realize the data related to the RN and the corresponding MAC CE, and the data related to the R-UE (substation terminal) and the effective transmission of the corresponding MAC CE on the Backhaul Link, the present invention proposes an R-MAC PDU in the Backhaul Link. The method, the transmission method, the system and the device of the relay-MAC PDU are used to improve the utilization of the Backhaul Link resource, and provide flexible and effective scheduling control for the RN and the R-UE, and effectively satisfy the data delay of the R-UE and the RN. The demand for data volume and other aspects, to improve the fairness of system resource scheduling. A MAC Control Element (MAC CE) belonging to a Relay Station (RN) and/or m Relay Subordinate Terminals (R-UEs), and a MAC Service Data Unit (MAC) belonging to the RN and/or k R-UEs are transmitted to the receiver on the road. SDU), m, k > l and an integer, encapsulates the one or more MAC CEs, and one or more MAC SDUs into R-MAC PDUs, and sends them to the receiver through the physical layer, where the sender is The R-MAC PDU carries at least indication information, and is used to indicate an RN or an R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU belong respectively. Where m and k can be equal.

The method for the sender to encapsulate the R-MAC PDU includes: the R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the sender will belong to the RN and/or m R-UEs. The MAC CE, and the MAC SDUs belonging to the RN and/or k R-UEs are encapsulated in the payload of the R-MAC PDU, m, k > l and are integers, at least the indication information is encapsulated in the R-MAC PDU header. The indication information is used to indicate an RN or an R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload respectively belong. Where m and k can be equal.

The method for the receiver to receive the R-MAC PDU includes: receiving the sender sent by the sender

An R-MAC PDU, the R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the receiver decapsulates a plurality of R-MAC PDU subheaders from the R-MAC PDU header, according to each The indication of the R-MAC PDU sub-decapsulation decapsulates one or more MAC CEs and one or more MAC SDUs from the R-MAC PDU payload, and learns from the indication information carried in the R-MAC PDU header The RN or R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload respectively belong.

The system for transmitting MAC PDUs on the Backhaul Link is as shown in FIG. 5, including a transmitting device and a receiving device, where:

And a sending device, configured to encapsulate a MAC CE belonging to the RN and/or the m R-UEs, and a MAC SDU belonging to the RN and/or the k R-UEs in the R-MAC PDU payload, where m, k > 1 and In an integer, at least the indication information is encapsulated in the R-MAC PDU header, and the encapsulated R-MAC PDU is sent to the receiving device; wherein m and k may be equal.

a receiving device, configured to receive an R-MAC PDU sent by the sender, decapsulate the indication information from the R-MAC PDU header, and decapsulate the MAC CE and the MAC SDU from the R-MAC PDU payload, and according to the indication The information determines the RN or R-UE to which the MAC CE and the MAC SDU belong, respectively.

Further, the sending device includes a packaging unit and a sending unit, where:

The encapsulating unit is configured to encapsulate one or more MAC CEs, and one or more MAC SDUs in an R-MAC PDU payload, and to encapsulate the indication information in an R-MAC PDU header; The R-MAC PDU header can be encapsulated in any of three ways, as described in the following Method 1, Method 2 and Method 3.

The sending unit is configured to send the encapsulated R-MAC PDU.

Further, the receiving device includes a decapsulation unit and a node confirmation unit, where: Decapsulating unit, configured to decapsulate indication information from the R-MAC PDU header, decapsulate one or more MAC CEs from the R-MAC PDU payload, and one or more MAC SDUs ;

The node confirming unit is configured to determine, according to the decapsulation information decapsulated by the decapsulation unit, node information of the RN or the R-UE to which the MAC CE and the MAC SDU belong respectively.

The above sender or transmitting device is an eNB or an RN, and accordingly, the receiving or receiving device is an RN or an eNB.

The MAC CE associated with the RN is denoted as R-MAC CE (R stands for Relay), the MAC CE associated with the R-UE is denoted as U-MAC CE (U stands for UE), and the MAC SDU associated with the RN is denoted as R-MAC SDU The MAC SDU associated with the R-UE is represented as a U-MAC SDU.

The foregoing indication information may be a node identifier, where each sub-header in the R-MAC PDU header carries the node identifier, and the node identifier is used to indicate a node to which the MAC CE or the MAC SDU corresponding to each sub-header belongs;

The foregoing indication information may also be a newly added sub-header, and the corresponding MAC is carried in the sub-header.

The number information of the CE subheader and/or the MAC SDU subheader and the node identifier to indicate the node assignment of the corresponding MAC CE and/or MAC SDU.

The foregoing indication information may also be a continuous flag bit, or a continuous flag bit and a node identifier, and the continuation flag is carried in each sub-header of the R-MAC PDU header, and is used to indicate the MAC CE or MAC SDU corresponding to the current sub-header. Whether the MAC CE or MAC SDU corresponding to the previous sub-header belongs to the same node belongs to the RN or belongs to the same R-UE. When not belonging to the same node, the sub-header carries the node identifier to indicate the MAC corresponding to the current sub-header. The node to which the CE or MAC SDU belongs.

Depending on the encapsulation method used by the transmitting device, that is, the indication information is different, it is received by a different receiving device:

Receiving device one:

Decapsulating unit, configured to decapsulate a plurality of R-MAC PDU subheaders from the R-MAC PDU header, and decapsulate the MAC CE corresponding to the current subheader from each R-MAC PDU subheader or Attribute and/or length information of the MAC SDU, and a node identifier as the indication information, decapsulating one or more MAC CEs from the R-MAC PDU payload according to the obtained attribute and/or length information, and one or Multiple MAC SDUs;

The node confirming unit is configured to learn, according to the obtained node identifier, the device identifier of the node identifier:

Decapsulating unit, configured to decapsulate one or more S subheaders as indication information from a first subheader region of the R-MAC PDU header, from a second subheader of the R-MAC PDU header The area decapsulation encapsulates one or more MAC CE subheaders corresponding to the MAC CE, and one or more MAC SDU subheaders corresponding to the MAC SDU, and learns according to the indication in the subheader in the second subheader area. Attribute and/or length information of a MAC CE or a MAC SDU corresponding to the sub-header, decapsulating one or more MAC CEs from the R-MAC PDU payload according to the attribute and/or length information, and a Or a plurality of MAC SDUs; the decapsulating unit is further configured to decapsulate the sub-head number information n and the node identifier from the S sub-header, η > 1 and n is an integer;

The node confirming unit is configured to learn, according to the sub-head number information n and the node identifier

The MAC CE in the R-MAC PDU payload corresponding to the n consecutive sub-heads corresponding to the S sub-header and/or the RN or R-UE to which the MAC SDU belongs.

Receiving device three:

Decapsulating unit, configured to decapsulate a plurality of R-MAC PDU subheaders from the R-MAC PDU header, and decapsulate the MAC CE corresponding to the current subheader from each R-MAC PDU subheader or Attribute and/or length information of the MAC SDU, decapsulating one or more MAC CEs and one or more MAC SDUs from the R-MAC PDU payload according to the attributes and/or length information, the solution The encapsulating unit is further configured to decapsulate a continuous flag as the first indication information from each R-MAC PDU subheader, and decapsulate from the R-MAC PDU subheader according to the notification of the node acknowledgment unit. a node identifier indicating the information;

The node confirming unit is configured to learn, according to the continuous flag, whether the MAC CE or MAC SDU corresponding to the current R-MAC PDU subheader and the MAC CE or MAC SDU corresponding to the previous R-MAC PDU subhead belong to the RN or the same An R-UE, when consecutive flags indicate the current R-MAC PDU When the MAC CE or MAC SDU corresponding to the sub-header and the MAC- or MAC SDU corresponding to the previous R-MAC PDU sub-head do not belong to the RN or the same R-UE, the decapsulation unit is notified to decapsulate the node identifier, according to the Declaring, by the encapsulating unit, the node identifier decapsulated from the R-MAC PDU subheader, the RN or R-UE to which the MAC SDU or the MAC CE corresponding to the current R-MAC PDU subheader belongs.

The following is an example of different instructions.

method one:

eNB and IN hsacKiiaui Lir

When transmitting a MAC Control Element (MAC CE), the sender encapsulates the one or more MAC SDUs and one or more MAC CEs as MAC PDUs transmitted on the Backhaul Link, ie, R-MAC PDUs. And transmitting to the receiver after further processing by the physical layer, where the R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the R-MAC PDU payload is encapsulated with the RN and/or a MAC CE of the R-UE (substation terminal) and a MAC SDU of the RN and/or the R-UE, and the R-MAC PDU header is encapsulated with a plurality of R-MAC PDU subheaders, including one or more corresponding a MAC CE subheader of the MAC CE, and one or more MAC SDU subheaders corresponding to the MAC SDU, a MAC CE subheader in the R-MAC PDU header and a MAC CE in the R-MAC PDU payload - Correspondingly, the corresponding information is used to indicate the attribute and/or length information of the corresponding MAC CE or MAC SDU, and the associated node information.

The sender indicates the node information to which the MAC CE or MAC SDU corresponding to the R-MAC PDU subheader belongs by carrying the node identifier (Node ID) in the R-MAC PDU subheader. When the sub-header corresponds to the R-MAC CE or the R-MAC SDU, that is, when the MAC SDU or MAC CE corresponding to the sub-header belongs to the RN, the Node ID is the RN ID; when the sub-head corresponds to the U-MAC CE or U- In the MAC SDU, when the MAC SDU or MAC CE corresponding to the sub-header belongs to the R-UE, the Node ID is the R-UE ID. The R-UE ID may be a C-RNTI (Cell-Radio Network Temporary Identifier) of the R-UE, or may be another ID that can uniquely identify the R-UE between the eNB and the RN. . The following describes the format and method of the encapsulated R-MAC PDU (Relay-MAC PDU):

As shown in Figure 6, the R-MAC PDU consists of two parts: an R-MAC PDU header and an R-MAC PDU payload. In an R-MAC PDU, the header part precedes and then the payload part. The R-MAC PDU header includes multiple R-MAC PDU subheaders, and the payload part includes one or more MAC CEs, which may be a U-MAC CE belonging to an R-UE, or may be an R-MAC belonging to the RN. The CE, and one or more MAC SDUs, may be U-MAC SDUs belonging to an R-UE, or may be R-MAC SDUs belonging to the RN, and may also include certain Paddings introduced according to the length specification of the R-MAC PDUs. byte. The MAC CE is in front of the payload, followed by the MAC SDU and possibly Padding. Each R-MAC PDU subheader corresponds to a MAC CE or MAC SDU or Padding in the payload, indicating information about the corresponding MAC CE or MAC SDU, or indicating padding. The order in which the R-MAC PDU subheaders are arranged in the R-MAC PDU header corresponds to the order in which the MAC CE and MAC SDUs and possible Padding bytes are arranged in the payload.

The R-MAC PDU subheader is divided into: a subheader indicating a MAC SDU, a subheader indicating a MAC CE, and a subheader indicating Padding, where:

The subheader used to indicate the MAC SDU can occupy 3 or 4 or 5 bytes, and the structure is R/R/E/LCID/F/L/Node ID;

The subheader used to indicate the MAC CE can occupy 2 or 3 bytes, and the structure is R/R/E/LCID/Node.

ID;

The subheader used to indicate Padding occupies 1 byte and the structure is R/R/E/LCID.

among them:

R - lbit, reserved, no indication meaning;

E - lbit, used to indicate that this subheader is followed by another R-MAC PDU subheader, or the beginning of the payload;

LCID - 5bit, indicating the related attributes of the MAC SDU or MAC CE corresponding to this subheader, or indicating Padding; F - lbit, used to indicate that the length of the L area is 7 bits or 15 bits.

L - 7bit or 15bit, used to indicate the length of the information of the corresponding MAC SDU;

Node ID - 8bit or 16bit. When this subheader corresponds to an R-MAC CE or an R-MAC SDU, the Node ID indicates the RN ID. When this subheader corresponds to a U-MAC CE or a U-MAC SDU, the Node ID indicates R- UE ID. The R-UE ID may be the C-RNTI of the R-UE, or may be another ID capable of uniquely identifying the R-UE between the eNB and the RN.

The following is an example of the L and Node ID occupied bytes:

Referring to FIG. 7a, in the sub-header corresponding to the MAC SDU, L occupies 7 bits, and the Node ID occupies 16 bits. Referring to FIG. 7b, in the sub-header corresponding to the MAC SDU, L occupies 15 bits, and the Node ID occupies 16 bits.

Referring to FIG. 8a, in the sub-header corresponding to the MAC SDU, L occupies 7 bits, and the Node ID occupies 8 bits. Referring to FIG. 8b, in the sub-header corresponding to the MAC SDU, L occupies 15 bits, and the Node ID occupies 8 bits.

Referring to Figure 9a, in the sub-header corresponding to the MAC CE, the Node ID occupies 16 bits. Referring to Figure 9b, in the sub-header corresponding to the MAC CE, the Node ID occupies 8 bits.

The R-MAC PDU payload can include one or more MAC CEs. The types of MAC CE information are:

Cache Status Report—Buffer Status Report (BSR) MAC control element

Discontinuous transmission configuration indication --DRX Command MAC Control Element

Timing Advance Command MAC Control Element Power Control Indicator - Power Headroom MAC Control Element

The encapsulation order of each subheader in the R-MAC PDU header is: one or more subheaders corresponding to the MAC CE are preceded, followed by one or more subheaders corresponding to the MAC SDU, and finally there may be Padding related Child head. The MAC CE, the MAC SDU, and the encapsulation order of the Padding bytes that may be performed according to the R-MAC PDU length specification in the payload of the R-MAC PDU correspond to the corresponding sub-header order in the R-MAC PDU header. The Node ID information included in each sub-head indicates that the corresponding MAC CE, MAC SDU belongs to the RN or an R-UE. The R-MAC PDU payload may have one or more MAC CEs, and one or more MAC SDUs, which may belong to the RN or belong to different R-UEs respectively; MAC CEs belonging to the RN or the same R-UE There may be one or more MAC SDUs. The composition of the specific MAC CE and MAC SDU is consistent with that of the LTE system.

In addition, according to the R-MAC PDU length specification, after the R-MAC PDU header portion and the corresponding MAC CE and MAC SDU are sequentially encapsulated, if the length of the R-MAC PDU does not reach the corresponding specified value, then A certain Padding byte needs to be filled into the R-MAC PDU until the length of the R-MAC PDU is the specified length. The Padding portion is populated at the end of the R-MAC PDU payload, and Padding adds the corresponding indicator subheader to the R-MAC PDU header to become the last subheader in the R-MAC PDU header portion.

Method Two:

In this method, a sub-header type of an R-MAC PDU is added, and the sub-header does not correspond to information in the payload, but belongs to the RN or belongs to the same R-UE included in the R-MAC PDU. The number of subheaders and the corresponding node identifiers are uniformly indicated, which is called S-subheader (Subheader Number indication subheader).

When the eNB and the RN perform the transmission of the MAC SDU and the MAC CE on the Backhaul Link, the sender encapsulates the MAC SDU and the MAC CE into R-MAC PDUs, and further processes the physical layer to send to the receiver, the R - the MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, a MAC CE encapsulating the RN or R-UE, and a MAC SDU of the RN or R-UE in the R-MAC PDU payload, The R-MAC PDU header includes a first sub-header area and a second sub-header area, wherein the first sub-header area is encapsulated with one or more s sub-headers, and the second sub-header area is encapsulated with one or more corresponding to the MAC. a MAC CE subheader of the CE, and one or more MAC SDU subheaders corresponding to the MAC SDU, where the MAC CE subheader in the second subheader region corresponds to the MAC CE in the R-MAC PDU payload, The MAC SDU sub-header in the second sub-header region corresponds to the MAC SDU in the R-MAC PDU payload, and the MAC CE sub-header and the MAC SDU sub-header are used to indicate the corresponding MAC CE or MAC address. Attribute and/or length information of the SDU; the first sub-header area is located at the forefront of the R-MAC PDU header part, and each S sub-header in the first sub-header area and η in the second sub-header area ( > 1, and n is an integer) consecutive phase subheader Correspondingly, the MAC CE and/or the MAC SDU corresponding to the n consecutive sub-headers belong to the same node, that is, belong to the RN or belong to the same R-UE, and the sub-header information is encapsulated in the S sub-header. And the node information of the MAC CE and/or the MAC SDU corresponding to the n consecutive sub-headers, that is, the RN ID or the R-UE ID.

The R-MAC PDU header may further include a third sub-header area, where the third sub-header area includes a sub-head corresponding to Padding, and is used to indicate whether the R-MAC PDU is Padding-filled, the third sub-header The area is located after the second sub-header area and is also the end of the entire R-MAC PDU header.

The sender indicates n MAC CEs by carrying a node identifier (Node ID) in the S subheader.

Or when the MAC CE belongs to the RN, the Node ID in the S subheader is the RN ID; the MAC SDU or MAC CE corresponding to the n MAC CE subheads and/or the MAC SDU subheader of the S subheader belongs to the R-UE. The Node ID in the S subheader is the R-UE ID. The R-UE ID may be the C-RNTI of the R-UE, or may be another ID that can uniquely identify the R-UE between the eNB and the RN.

In the first sub-header area, when there is only one S sub-header, it indicates all R-MACs in the second sub-header area.

The PDU sub-headers belong to the same node, for example, both belong to the RN or belong to one R-UE. In this case, the sum of the number of MAC CEs and MAC SDUs included in the R-MAC PDU payload is carried in the S sub-header. The number of R-MAC PDU subheaders is the same.

When there are two or more S subheaders, the order of encapsulation of each S subheader in the first subheader region is the same as the order. For example, when there are two S _subheaders , it is _assumed that the quantity information indicated in the first S _subheader is _ηι , the quantity information indicated in the second S _subheader is n ₂ , and the first S _{subheader is} in the second _subheader front, the sub-header in the second region, MAC CE subheader and / or MAC SDU _ηι consecutive sub-header of the first sub-header corresponding to S in front, MAC CE consecutive sub-header corresponding to the second S subheader and / or The MAC SDU subheader is followed by the sum of the number of MAC CEs and MAC SDUs in the R-MAC PDU payload portion, _ηι + η ₂ . The order of encapsulation of more than three S subheaders is similar.

In the n consecutive subheaders in the second subheader region corresponding to a certain S subheader, the MAC CE subheader is in the front, the MAC SDU subheader is in the back, and correspondingly, in the R-MAC PDU payload, the S subs MAC CE and MAC SDU corresponding to the n consecutive subheads in the second subheader region corresponding to the header, MAC CE Previously, the MAC SDU was behind.

The following describes the encapsulated R-MAC PDU format and method:

As shown in FIG. 10, the R-MAC PDU is composed of an R-MAC PDU header and an R-MAC PDU payload. In an R-MAC PDU, the header portion precedes the payload portion. The R-MAC PDU header includes one or more R-MAC PDU subheaders, and the payload portion respectively includes one or more MAC SDUs, and one or more MAC CEs, and may also include according to the length specification of the R-MAC PDU. A certain padding byte Padding is introduced. Among the one or more MAC CEs and MAC SDUs belonging to the RN or belonging to the same R-UE in the payload, the MAC CE is first, followed by the MAC SDU, and the possible Padding is at the end of the R-MAC PDU payload portion.

The R-MAC PDU header includes two parts, a first sub-header area and a second sub-header area, wherein the first sub-header area is encapsulated with one or more S sub-headers, and the S sub-header does not correspond to the payload. The information is a unified indication of the number of sub-headers belonging to the RN or belonging to the same R-UE and the corresponding node identification information contained in the R-MAC PDU header. The second sub-header area is encapsulated with a MAC CE sub-header and a MAC SDU sub-header, respectively corresponding to the MAC SDU or MAC CE in the payload, indicating information about the corresponding MAC SDU or MAC CE. The order in which the MAC CE sub-header corresponding to the MAC CE and the MAC SDU sub-head corresponding to the MAC SDU are arranged in the second sub-header area corresponds to the order in which the MAC CE and the MAC SDU are arranged in the payload. When the payload is filled with Padding, the R-MAC PDU header finally includes a third sub-header region, which is encapsulated with a Padding sub-header for indicating that Padding is filled at the end of the R-MAC PDU payload.

The S subheader is used to indicate the number of subheaders belonging to the RN or belonging to the same R-UE and the corresponding ID information included in the R-MAC PDU, occupying 2 or 3 bytes, and the structure is R/R/E/S No. /Node ID.

The subheader used to indicate the MAC SDU can occupy 2 or 3 bytes and the structure is R/R/E/LCID/F/L. The subheader used to indicate MAC CE or Padding occupies 1 byte and has the structure R/R/E/LCID. among them:

R - lbit, reserved, no indication meaning;

E - lbit, in the S subheader, used to indicate that this S subheader is followed by another S subheader, or other type of subheader; in other types of subheaders, used to indicate this subheader Next is Another subheader, or the beginning of the payload;

LCID - 5bit, indicating the related attributes of the MAC SDU or R-MAC CE corresponding to this subheader, or indicating Padding;

S No. - 5bit, indicating the number of subheaders belonging to the RN or belonging to the same R-UE included in the R-MAC PDU;

F - lbit, used to indicate that the length of the L area is 7 bits or 15 bits.

Node ID - 8bit or 16bit. When the S subheader corresponds to the RN, the Node ID indicates the RN ID. When the S subheader corresponds to the R-UE, the Node ID indicates the R-UE ID. The R-UE ID may be the C-RNTI of the R-UE, or may be another ID that uniquely identifies the R-UE.

The following is an example of the Node ID occupation byte:

Referring to Figure 11a, in the S sub-header of the MAC PDU, the Node ID occupies 16 bits; see Figure l ib. In the S sub-header of the MAC PDU, the Node ID occupies 8 bits. The R-MAC PDU payload can include one or more MAC CEs. The types of MAC CE information are:

Cache Status Report—Buffer Status Report (BSR) R-MAC control element Discontinuous Transmission Configuration Indicator --DRX Command R-MAC Control Element

Timing Advance Command R-MAC Control Element Power Control Indicator - Power Headroom R-MAC Control Element

The encapsulation order of each subheader in the R-MAC PDU header is as follows: First, one or more S subheaders are encapsulated in the first subheader region; then, in the order of the S subheaders, the RNs are sequentially encapsulated in the second subheader region. Or one or more sub-headers belonging to the same R-UE, where among the one or more sub-headers belonging to the RN or belonging to the same R-UE, the sub-header corresponding to the MAC CE is preceded, and the sub-header corresponding to the MAC SDU is behind Finally, the possible third sub-header is encapsulated with Padding-related subheaders. MAC CE, MAC SDU in R-MAC PDU payload and possible according to R-MAC PDU length specification The encapsulation order of the padding bytes Padding is performed corresponding to the corresponding sub-header order in the R-MAC PDU header. In the second sub-header area, MAC CEs and MAC SDUs belonging to the RN or belonging to the same R-UE are sequentially adjacent.

The MAC CE and the MAC SDU in the R-MAC PDU payload may have one or more, may belong to the RN, or may belong to different R-UEs respectively; the MAC CE and the MAC SDU belonging to the RN or the same R-UE may have one or more. The specific MAC CE and MAC SDU are in the same manner as the LTE system.

According to the R-MAC PDU length specification, after the R-MAC PDU header part and the corresponding MAC CE and MAC SDU are sequentially encapsulated, if the length of the R-MAC PDU does not reach the corresponding value, the R- The MAC PDU is filled with a certain number of Paddings until the length of the R-MAC PDU is within the specified length. The Padding part is padded at the end of the R-MAC PDU payload, and Padding adds the corresponding indicator subhead in the R-MAC PDU header to become the third sub-header area, which is located at the end of the R-MAC PDU header part.

Method three:

When the eNB and the RN perform the transmission of the MAC SDU and the MAC CE on the Backhaul Link, the sender encapsulates the MAC SDU and the MAC CE into R-MAC PDUs, and further processes the physical layer to send to the receiver, the R - the MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, a MAC CE encapsulating the RN or R-UE, and a MAC SDU of the RN or R-UE in the R-MAC PDU payload, The R-MAC PDU header is encapsulated with a plurality of R-MAC PDU subheaders, and the plurality of R-MAC PDU subheaders respectively correspond to the MAC CE and the MAC SDU in the R-MAC PDU payload, respectively, for indicating Attribute and/or length information of the corresponding MAC CE or MAC SDU, and indicating, by the continuity flag, the MAC CE or MAC SDU corresponding to the sub-header and the MAC CE or MAC SDU corresponding to the previous R-MAC PDU sub-header Whether they belong to the same node belongs to the RN or belongs to the same R-UE. When the MAC CE or the MAC SDU corresponding to the sub-header does not belong to the same node as the MAC CE or the MAC SDU corresponding to the previous sub-header, the sub-header further includes a node identifier, which is used to indicate the MAC corresponding to the sub-header. Node information to which the SDU or MAC CE belongs.

Encapsulating a plurality of R-MAC PDU subheaders in the R-MAC PDU header, including one or more a MAC CE subheader corresponding to the MAC CE, and one or more MAC SDU subheaders corresponding to the MAC SDU, the MAC CE subheader in the R-MAC PDU header and the MAC CE in the R-MAC PDU payload - Correspondingly, the MAC SDU subheader in the R-MAC PDU header corresponds to the MAC SDU in the R-MAC PDU payload.

The sender indicates the node by carrying a node identifier (Node ID) in the R-MAC PDU subheader.

Node information of the MAC CE or MAC SDU corresponding to the R-MAC PDU subheader. When the sub-head corresponds to the R-MAC CE or the R-MAC SDU, the Node ID is the RN ID; when the sub-head corresponds to the U-MAC CE or the U-MAC SDU, the Node ID is the R-UE ID. The R-UE ID may be the C-RNTI of the R-UE, or may be another ID that can uniquely identify the R-UE between the eNB and the RN.

When the MAC CE and the MAC SDU are encapsulated in the R-MAC PDU payload,

In the MAC CE and MAC SDU of the RN or the same R-UE, the MAC CE is encapsulated first and the MAC SDU is encapsulated later.

The following describes the encapsulated R-MAC PDU format and method:

As shown in Figure 12, the R-MAC PDU consists of two parts: the R-MAC PDU header and the R-MAC PDU payload, with the header part first and then the payload part. The R-MAC PDU header includes multiple R-MAC PDU subheaders, and the payload part includes one or more MAC CEs, which may be a U-MAC CE belonging to an R-UE, or may be an R-MAC belonging to the RN. The CE, and one or more MAC SDUs, may be U-MAC SDUs belonging to an R-UE, or may be R-MAC SDUs belonging to the RN, and may also include a certain padding introduced according to the length specification of the R-MAC PDU. Byte Padding. Among the one or more MAC CEs and MAC SDUs of the R-MAC PDU payload belonging to the RN or belonging to the same R-UE, the MAC CE is first, followed by the MAC SDU, and the possible Padding is in the R-MAC PDU payload part. At last. Each R-MAC PDU subheader corresponds to one MAC CE or MAC SDU or Padding in the payload, indicating information about the corresponding MAC CE or MAC SDU, or indicating padding. The order in which the R-MAC PDU subheaders are arranged in the R-MAC PDU header corresponds to the order in which the MAC CE and the MAC SDU and the possible Padding bytes are arranged in the payload.

The R-MAC PDU subheader is divided into: a subheader indicating a MAC SDU, indicating a subheader of the MAC CE, and a subheader indicating Padding, where:

The subheader used to indicate the MAC SDU can occupy 2 or 3 or 4 or 5 bytes, and the structure is R/D/E/LCID/F/L or R/D/E/LCID/F/L/Node ID, where the structure is 3 or 4 or 5 words when R/D/E/LCID/F/L The structure is R/D/E/LCID/F/L/Node ID, which occupies 2 or 3 bytes; it is used to indicate that the subheader belonging to the MAC CE can occupy 1 or 2 or 3 bytes, and the structure is R/D. /E/LCID or R/D/E/LCID/Node ID, where the structure takes 1 byte for R/D/E/LCID and 2 or 3 for R/D/E/LCID/Node ID byte;

among them:

R - lbit, reserved, no indication meaning;

D-lbit, indicating whether the MAC CE or the MAC SDU corresponding to the sub-header belongs to the same node as the MAC CE or the MAC SDU corresponding to the previous sub-header, that is, both belong to the RN or belong to the same R-UE, if with the previous one If the MAC CE or MAC SDU corresponding to the subheader belongs to the same node, and the subheader is the subheader of the MAC CE, the structure is R/D/E/LCID. When the subheader is the MAC SDU subheader, the structure is R/. D/E/LCID/F/L, that is, the corresponding Node ID is not indicated in the subheader; if it does not belong to the same node, and the subheader is a subheader of the MAC CE, the structure is R/D/E/LCID/ Node ID, when the subheader is a subheader of the MAC SDU, the structure is R/D/E/LCID/F/L/Node ID, and the ID of the node to which the MAC CE or MAC SDU corresponding to the subheader belongs is indicated in the Node ID field. Information

F - lbit, used to indicate that the length of the L area is 7 bits or 15 bits.

The following is an example of the L and Node ID occupied bytes:

Referring to FIG. 13a, in the sub-header corresponding to the MAC SDU, L occupies 7 bits, and the Node ID occupies 16 bits. Referring to FIG. 13b, in the sub-header corresponding to the MAC SDU, L occupies 15 bits, and the Node ID occupies 16 bits. Referring to FIG. 14a, in the sub-header corresponding to the MAC SDU, L occupies 7 bits, and the Node ID occupies 8 bits. Referring to FIG. 14b, in the sub-header corresponding to the MAC SDU, L occupies 15 bits, and the Node ID occupies 8 bits.

Referring to FIG. 15a, L corresponds to a sub-header of a MAC SDU that does not include a Node ID, and L occupies 7 bits. Referring to FIG. 15b, L corresponds to a sub-header of a MAC SDU that does not include a Node ID, and L occupies 15 bits.

Referring to Figure 16a, in the sub-header corresponding to the MAC CE, the Node ID occupies 8 bits. Referring to Figure 16b, in the sub-header corresponding to the MAC CE, the Node ID occupies 16 bits.

See Figure 17, which corresponds to the subheader of the MAC CE that does not contain the Node ID.

The encapsulation order of each sub-header in the R-MAC PDU header is: corresponding to one or more sub-headers belonging to the RN or belonging to the same R-UE, where one belongs to the RN or belongs to the same R-UE or Among the multiple subheaders, the subheader corresponding to the MAC CE is first, and the subheader corresponding to the MAC SDU is followed; among the one or more subheaders belonging to the RN or belonging to the same R-UE, the D indicator bit in the first subheader Indicates that the subheader is different from the node to which the previous subheader belongs, and the subheader structure is R/D/E/LCID/Node ID or R/D/E/LCID/F/L/Node ID, which is indicated in the Node ID area. ID information of the node to which it belongs; When there are multiple subheaders belonging to the same node, the D indicator bit from the second subheader indicates that the subheader is the same as the node to which the previous subheader belongs, and the subheader structure R/D is used. /E/LCID or R/D/E/LCID/F/L, no longer indicates the node ID information. One or more subheaders belonging to the same node in the R-MAC PDU header are sequentially encapsulated, followed by one or more subheaders of the other node, and finally a possible Padding-related subheader. The MAC CE, the MAC SDU in the payload of the R-MAC PDU, and the encapsulation order of padding Padding that may be performed according to the R-MAC PDU length specification correspond to the corresponding sub-header order in the R-MAC PDU header. MAC CEs and MAC SDUs belonging to the RN or belonging to the same R-UE are sequentially adjacent.

In addition, according to the R-MAC PDU length specification, after the R-MAC PDU header portion and the corresponding MAC CE and MAC SDU are sequentially encapsulated, if the length of the R-MAC PDU does not reach the corresponding specified value, then A certain number of Paddings need to be filled into the R-MAC PDU until the length of the R-MAC PDU is the specified length. The Padding portion is populated at the end of the R-MAC PDU payload, and Padding adds the corresponding indicator subheader to the R-MAC PDU header to become the last subheader in the R-MAC PDU header portion.

The R-MAC PDU format of the above three Backhaul Links is used for the data processing of the N(N1) R-UEs between the eNB and the RN and the corresponding MAC CE, and the data of the RN and the corresponding MAC CE. Different R-MAC PDU formats are selected according to different system settings and requirements for packet and transmission of data and related control information. When the data and related control transmitted by the Backhaul Link belong to multiple nodes, and the number of MAC CEs and MAC SDUs of each node is not large, the R-MAC PDU format of the first method is suitable, and the indication can be flexibly and effectively; when R-MAC The multiple MAC CEs and MAC SDUs encapsulated in the PDU belong to a few nodes. When the number of MAC CEs and MAC SDUs of each node is large, the format of Method 2 and Method 3 is more applicable, and the R-MAC can be effectively indicated. The related content in the PDU is further reduced by the indication overhead.

The R-MAC PDU format for the backhaul link according to the present invention will be described below by way of a specific example. The first method uses the first method, the first method, the third method, the second method, the second method, the second method, and the third method.

Example 1:

The eNB belongs to the following four U-MAC SDUs and three U-MAC CEs of the R-UE, R-UE1 to R-UE3, and two U-MAC SDUs belonging to the R-UE2, and the RN. 1 R-MAC SDU and 1 R-MAC CE information are encapsulated into one R-MAC PDU and transmitted to the RN on the backhaul link. According to the R-MAC PDU format 1 proposed by the present invention, the R-MAC is obtained. The PDU is shown in Figure 18.

The header part of the R-MAC PDU is encapsulated in turn:

The four R/R/E/LCID/Node ID sub-headers corresponding to the MAC CE correspond to one R-MAC CE and three U-MAC CEs in the payload part respectively. The sub-header format is shown in Figure 9a.

The five R/R/E/LCID/F/L/Node ID subheaders corresponding to the MAC SDU correspond to 4 U-MAC SDUs of the payload and 1 R-MAC SDU transmitted by the eNB to the RN. The C-RNTI of the corresponding R-UE is used as the UE ID identifier, and the RN ID is also 16 bits. The subheader structure is as shown in FIG. 7.

Each MAC CE, MAC SDU in the R-MAC PDU payload corresponds to the corresponding sub-header sequence in the R-MAC PDU header. The Node ID information included in each subheader indicates that the corresponding MAC CE and MAC SDU belong to the RN or an R-UE.

At the same time, since the length of the R-MAC PDU after the encapsulation is completed is not required to be filled, the payload of the R-MAC PDU does not include the Padding byte, and the corresponding header portion does not include the subhead indicating Padding.

Example 2:

The RN will subordinate 4 R-UEs, 5 U-MAC SDUs of R-UE1 to R-UE4, 3 U-MAC CEs, and 1 R-MAC PDU and 1 R-transmitted to the eNB by itself. The MAC CE information is encapsulated into one R-MAC PDU for transmission to the eNB on the backhaul link, where R-UE 1 has 2 U-MAC SDUs, and other R-UEs each have one U-MAC SDU, according to the present invention. The R-MAC PDU format is one, and the R-MAC PDU is obtained as shown in FIG.

The header part of the R-MAC PDU is encapsulated in turn:

The four R/R/E/LCID/Node ID sub-headers corresponding to the MAC CE correspond to one R-MAC CE and three U-MAC CEs of the payload part, respectively, where the RN ID is 8 bits, for R The UE also uses other 8-bit UE IDs that can uniquely identify the R-UE between the eNB and the RN as the identifier. The sub-header format is as shown in FIG. 9b.

Six R/R/E/LCID/F/L/Node ID subheaders corresponding to the MAC SDU correspond to 5 U-MAC SDUs of the payload and 1 R-MAC SDU transmitted by the eNB to the RN, respectively. among them, The RN ID is 8 bits. The R-UE also uses other 8-bit UE IDs that can uniquely identify the R-UE between the eNB and the RN. The sub-head structure is as shown in FIG. 8.

At the same time, since the length of the R-MAC PDU after the completion of the encapsulation does not reach the corresponding specified length, the corresponding Padding byte is filled in the last of the payload in the R-MAC PDU, and is added at the end of the corresponding header portion to indicate Padding. The R/R/E/LCID subheader has a subheader format as shown in Figure 4.

Example 3:

The eNB encapsulates 5 U-MAC SDUs and 2 U-MAC CE information belonging to 2 R-UEs in the RN, and encapsulates 1 R-MAC SDU and 2 R-MAC CEs belonging to the RN into one R-MAC PDU. The RN is transmitted on the backhaul link, and there are two U-MAC SDUs belonging to the R-UE1, one U-MAC CE, three U-MAC SDUs belonging to the R-UE2, and one U-MAC CE. According to the R-MAC PDU format 2 proposed by the present invention, an R-MAC PDU is obtained as shown in FIG.

The header of the R-MAC PDU contains:

The three S subheaders located in the first sub-header are formatted as R/R/E/S No./Node ID, corresponding to RN, R-UE 1 and R-UE 2, respectively, and each S subheader respectively indicates The number of MAC SDUs and MAC CE subheaders of the RN, R-UE 1 and R-UE2 and corresponding ID information. That is, the number of subheaders belonging to the RN is 3 and indicates the RN ID. The S subheader of R-UE1 indicates that the number of subheaders belonging to R-UE1 is 3, and indicates the R-UE1 ID. The S subheader of R-UE2 indicates that the number of subheaders belonging to R-UE2 is 4, and indicates the R-UE2 ID. The indication of the node ID uses an 8-bit UE ID that can uniquely identify the R-UE between the eNB and the RN, and the RN ID also uses an 8-bit identifier, as shown in FIG.

In the second sub-header area, including:

The four R/R/E/LCID subheaders corresponding to the MAC CE correspond to the two U-MAC CEs and the two R-MAC CEs of the payload part respectively, and the sub-header format is as shown in FIG. 4;

6 R/R/E/LCID/F/L subheaders corresponding to the MAC SDU, corresponding to the payload portion The five U-MAC SDUs of R-UE 1 and R-UE 2, and one R-MAC SDU sub-header of the RN are divided into three sub-headers.

In the header part of the R-MAC PDU, three S subheaders are preceded, and the total 10 subheaders of the corresponding MAC CE and MAC SDU are sequentially adjacent to each other according to the node order corresponding to the S subheader. And the sub-header corresponding to the MAC CE is first, and the sub-header corresponding to the MAC SDU is after.

The encapsulation order of the MAC CE and the MAC SDU in the payload of the R-MAC PDU corresponds to the corresponding sub-header sequence in the R-MAC PDU header. The MAC CE and the MAC SDU belonging to the RN or belonging to the same R-UE are sequentially adjacent.

Example 4:

The RN encapsulates 6 MAC SDUs and 2 U-MAC CEs of the 2 R-UEs of the subordinate and 1 R-MAC CE of its own into one R-MAC PDU, and transmits the R-MAC PDU to the eNB on the backhaul link, where There are three MAC SDUs for R-UE 1, three MAC SDUs for R-UE 2, and two U-MAC CEs. According to the R-MAC PDU format 2 proposed by the present invention, an R-MAC PDU is obtained as shown in FIG. 21.

The header of the R-MAC PDU contains:

The three S subheaders located in the first subheader are in the format of R/R/E/S No./Node ID, respectively.

RN, R-UE 1 and R-UE 2, each S subheader respectively indicates the number of MAC SDUs and MAC CE subheaders belonging to RN, R-UE 1 and R-UE2 and corresponding ID information. That is, the number of subheaders belonging to the RN is 1 and indicates the RN ID in the S subheader of the RN. The number of subheaders belonging to the R-UE1 in the S subheader of the R-UE1 is 3, and indicates the R-UE1 ID. The number of subheaders belonging to R-UE 2 is 5 in the S subheader of R-UE2, and indicates the R-UE2 ID. The R-UE ID is indicated by the C-RNTI identifier. The RN ID also uses the 16-bit identifier, as shown in Figure 11a.

In the second sub-header area, including:

3 R/R/E/LCID subheaders corresponding to MAC CE, corresponding to the payload part respectively R-MAC CE and U-MAC CE, the sub-header format is shown in Figure 4;

Six R/R/E/LCID/F/L subheaders corresponding to the MAC SDU correspond to the U-MAC SDU of the payload portion, and the subheader format is as shown in Fig. 3.

In the header part of the R-MAC PDU, three S subheaders are preceded, and a total of nine subheaders of the corresponding MAC CE and MAC SDU are sequentially arranged according to the node order corresponding to the S subheader, and multiple subheaders belonging to the same node are sequentially adjacent. And the sub-header corresponding to the MAC CE is first, and the sub-header corresponding to the MAC SDU is after.

Example 5:

The eNB encapsulates 4 U-MAC SDUs belonging to 2 R-UEs, 1 U-MAC CE, and 1 R-MAC SDU and 2 R-MAC CE information belonging to the RN into one R-MAC PDU. The RN is transmitted on the backhaul link, wherein there are one U-MAC SDU belonging to the R-UE 1, three U-MAC SDUs belonging to the R-UE 2, and one U-MAC CE. According to the R-MAC PDU format 3 proposed by the present invention, an R-MAC PDU is obtained as shown in FIG.

The header of the R-MAC PDU contains:

Three subheaders corresponding to the MAC CE, in the format of R/D/E/LCID or R/D/E/LCID/Node ID. The U-MAC CE sub-header format of the R-UE2 is R/D/E/LCID/Node ID, and the C-RNTI is identified by the R-UE ID, as shown in FIG. 16b; the R-MAC CE belonging to the RN There are two sub-headers, and the RN ID is 16 bits. The first sub-header format is R/D/E/LCID/Node ID. As shown in Figure 16b, the second sub-header format is R/D/E/LCID. , as shown in Figure 17.

5 corresponding to the MAC SDU subheader, the format is R/D/E/LCID/F/L or R/D/E/LCID/F/L/Node ID, corresponding to the 4 U-MACs of the payload part respectively. SDU and 1 R-MAC SDU. The Node ID corresponding to the R-UE ID is the C-RNTI of the corresponding R-UE. The RN also uses the 16-bit ID to identify it, as shown in Figure 13.

The sub-header of the corresponding RN in the header part of the R-MAC PDU is preceded by two sub-headers corresponding to the R-MAC CE, and one sub-header corresponding to the R-MAC SDU, where the first one corresponds to the R-MAC CE The sub-header format is R/D/E/LCID/Node ID, the D indication bit is 1, indicating that the sub-header contains the Node ID indication information, the Node ID indicates the RN ID, and the second sub-header format corresponding to the R-MAC CE For R/D/E/LCID, the sub-header format of the corresponding R-MAC SDU is R/D/E/LCID/F/LD, and the D indicator bits in the two subheaders are 0, indicating the corresponding subheader. The node is the same as the previous subheader, and the subheader does not contain the Node ID;

Next is an R-MAC SDU sub-header corresponding to R-UE1. The sub-header format is R/D/E/LCID/F/L/Node ID, where the D indicator bit has a value of 1, indicating this subheader. Contains Node ID information, and the Node ID indicates the R-UE1 ID;

Finally, the sub-headers corresponding to the R-UE 2 are respectively a sub-header corresponding to the U-MAC CE, and three sub-headers corresponding to the U-MAC SDU, wherein the sub-header format corresponding to the U-MAC CE is R/ D/E/LCID/Node ID, D indicates that the bit is 1, indicating that the sub-header contains the Node ID indication information, the Node ID indicates the R-UE 2 ID, and the sub-header format of the three corresponding R-MAC SDUs is R/D/ E/LCID/F/LD, the D indicator bit in the subheader is 0, indicating that the node corresponding to this subheader is the same as the previous subheader, and the subheader does not contain the Node ID.

Example 6:

The RN encapsulates 4 U-MAC SDUs, 2 U-MAC CEs, and 2 R-MAC CE information of the 2 R-UEs of the subordinate into one R-MAC PDU for transmission to the eNB on the backhaul link. , wherein there are 2 U-MAC SDUs belonging to R-UE 1, and 1 U-MAC CE, belonging to There are two U-MAC SDUs for R-UE 2 and one for U-MAC CE. According to the R-MAC PDU format 3 proposed by the present invention, an R-MAC PDU is obtained as shown in FIG.

The header of the R-MAC PDU contains:

The four subheaders corresponding to the MAC CE are in the format of R/D/E/LCID or R/D/E/LCID/Node ID. The U-MAC CE sub-header format of the R-UE 1 and the R-UE 2 is an R/D/E/LCID/Node ID, and the 8-bit UE ID that can uniquely identify the R-UE between the eNB and the RN is used as the identifier. As shown in Figure 16a, there are two sub-headers of the R-MAC CE belonging to the RN. The first sub-header format is R/D/E/LCID/Node ID, and the RN ID is also identified by an 8-bit identifier, as shown in Figure 16a. As shown, the second subheader header format is R/D/E/LCID, as shown in Figure 17.

Four correspond to the MAC SDU subheaders, and the format is R/D/E/LCID/F/L, which corresponds to the four U-MAC SDUs of the payload portion. The Node ID corresponding to the R-UE ID is identified by an 8-bit UE ID that can uniquely identify the R-UE between the eNB and the RN, as shown in FIG.

The first part of the R-MAC PDU is the sub-header corresponding to the R-UE 2, which is a sub-header corresponding to the U-MAC CE, and two sub-headers corresponding to the U-MAC SDU, where the corresponding U-MAC The sub-header format of the CE is R/D/E/LCID/Node ID, and the D indicator bit is 1, indicating that the sub-header contains Node ID indication information, the Node ID indicates the R-UE 2 ID, and the two corresponding R-MAC SDUs. The subheader format is R/D/E/LCID/F/LD, and the D indicator bit in the subheader is 0, indicating that the node corresponding to this subheader is the same as the previous subheader, and the subheader does not contain the Node ID;

Next, the sub-headers of the two corresponding R-MAC CEs corresponding to the RN, wherein the first sub-header format corresponding to the R-MAC CE is R/D/E/LCID/Node ID, and the D indication bit is 1, indicating The sub-header contains the Node ID indication information, the Node ID indicates the RN ID, the sub-header format of the second corresponding R-MAC CE is R/D/E/LCID, and the D indication bit is 0, indicating the node corresponding to the sub-header. Same as the previous subheader, the subhead does not contain the Node ID;

Finally, the sub-headers corresponding to the R-UE 1 are respectively a sub-header corresponding to the U-MAC CE, and two sub-headers corresponding to the U-MAC SDU, wherein the sub-header format corresponding to the U-MAC CE is R/ D/E/LCID/Node ID, D indicates that the bit is 1, indicating that the sub-header contains the Node ID indication information, the Node ID indicates the R-UE 1 ID, and the sub-header format of the two corresponding R-MAC SDUs is R/D/ E/LCID/F/LD, the D indicator bit in the subheader is 0, indicating that the node corresponding to this subheader is the same as the previous subheader, and the subheader does not contain the Node ID. The encapsulation order of the MAC CE and MAC SDU in the R-MAC PDU payload corresponds to the corresponding sub-header order in the R-MAC PDU header. MAC CEs and MAC SDUs belonging to the RN or belonging to the same R-UE are sequentially adjacent.

At the same time, since the length of the R-MAC PDU after the completion of the encapsulation does not reach the corresponding specified length, the last Padding byte of the payload in the R-MAC PDU is filled with the corresponding Padding byte and added at the end of the corresponding header portion for indication. The R/R/E/LCID subheader of Padding, the subheader format is shown in Figure 4.

The above application examples are only for further explanation of the hybrid relay method of the present invention, and the application scenarios and scope of the present invention are not limited to the above examples. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial applicability

The method, the transmission method, the system and the device for the R-MAC PDU of the backhaul link proposed by the invention realize the effective processing and packaging of the data and related control information on the Backhaul Link, thereby improving the utilization of the Backhaul Link resource and being flexible. Effective scheduling control transmission, more effectively meet the R-UE and RN requirements for data delay, data volume, etc., and improve the fairness of system resource scheduling.

Claims

Claim

A method for encapsulating a medium access control (MAC) protocol data unit (PDU) for a backhaul link, wherein the MAC PDU for a backhaul link is hereinafter referred to as an R-MAC PDU, and the method includes:

The R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the sender will belong to a MAC Control Element (CE) of the Relay Station (RN) and/or m Relay Subordinate Terminals (R-UEs), and A MAC Service Data Unit (SDU) belonging to the RN and/or k R-UEs is encapsulated in the payload of the R-MAC PDU, m, k > 1 and is an integer, and at least the indication information is encapsulated in the R-MAC PDU header. The indication information is used to indicate an RN or an R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload respectively belong.

2. The method according to claim 1, wherein the indication information is a node identifier, and the step of encapsulating the indication information in the R-MAC PDU header is:

Transmitting, by the sender, a plurality of R-MAC PDU subheaders in the R-MAC PDU header, MAC CE and MAC SDU attributes in the multiple R-MAC PDU subheaders and R-MAC PDU payloads and/or And the length information, and the indication information, where the indication information is the node information of the RN or the R-UE to which the MAC CE or the MAC SDU corresponding to the R-MAC PDU subheader belongs.

3. The method of claim 2, wherein

The R-MAC PDU header includes one or more MAC CE subheaders corresponding to the MAC CE, and one or more MAC SDU subheaders corresponding to the MAC SDU, where:

The R-MAC PDU subheader corresponding to the MAC SDU occupies 3 or 4 or 5 bytes, and the structure is R/R/E/LCID/F/L/Node ID;

The R-MAC PDU sub-header corresponding to the MAC CE occupies 2 or 3 bytes, and the structure is R/R/E/LCID/Node ID;

Where R is lbit, which is reserved; E is lbit, indicating that the subhead is followed by another

R-MAC PDU subheader, or the start of the payload; LCID occupies 5 bits, indicating the related attributes of the MAC CE or MAC SDU corresponding to the subheader; F occupies lbit, indicating the length of the L area; L occupies 7 bits Or 15 bits, indicating the length of the information of the MAC SDU corresponding to the sub-header; the Node ID is 8 bits or 16 bits, and is used to indicate the node identifier of the RN or the R-UE to which the MAC CE or the MAC SDU corresponding to the sub-header belongs.

4. The method according to claim 2, wherein the sender encapsulates a MAC CE belonging to the RN and/or m R-UEs, and a MAC SDU belonging to the RN and/or k R-UEs in the R- MAC

The steps in the payload of the PDU include:

The MAC CE is encapsulated first, and the MAC SDU is encapsulated.

The method according to claim 1, wherein the R-MAC PDU header includes a first sub-header area and a second sub-header area, and a sub-header in the first sub-header area serves as the indication information. The step of encapsulating at least the indication information in the R-MAC PDU header includes:

Transmitting, in the R-MAC PDU payload, a MAC CE of the RN and/or m R-UEs, and a MAC SDU of the RN and/or k R-UEs, in the R-MAC PDU header The first sub-header region encapsulates one or more S subheaders as indication information, and encapsulates one or more MAC CE subheaders corresponding to the MAC CE in the second subheader region of the R-MAC PDU header, and one Or a plurality of MAC SDU sub-headers corresponding to the MAC SDU, where the sub-headers in the second sub-header region correspond to the MAC CE and the MAC SDU in the R-MAC PDU payload, where the second sub-header area is The subheader is used to indicate the attribute and/or length information of the MAC CE or MAC SDU corresponding thereto; each of the S subheaders in the first subheader region and the n consecutive subtrees in the second subheader region Corresponding to the header, η > 1 and n is an integer, and the MAC CE and/or the MAC SDU in the R-MAC PDU payload corresponding to the n consecutive sub-headers in the second sub-header region belong to the RN or the same R - UE, the S subheader includes sub-head number information n, and MAC CE and / in the R-MAC PDU payload corresponding to n consecutive sub-headers in the second sub-header area MAC SDU belongs RN node information or the R-UE.

6. The method of claim 5, wherein

The S subheader occupies 2 or 3 bytes, and the structure is R/R/E/S No./Node ID;

R occupies lbit, is reserved; E occupies lbit, indicating that the subheader is followed by another R-MAC PDU subheader, or the beginning of the payload; S No. occupies 5 bits, indicating that it belongs to RN or the same R- UE The sub-head number information n; the Node ID is 8 bits or 16 bits, and is used to indicate that the MAC CE and/or the MAC SDU corresponding to the n sub-headers in the second sub-header indicated by the S sub-header belong to the RN or the R-UE. Node ID.

7. The method of claim 5, wherein in the second sub-header region:

The MAC SDU subheader corresponding to the MAC SDU occupies 2 or 3 bytes, and the structure is

R/R/E/LCID/F/L;

The MAC CE subheader corresponding to the MAC CE occupies 1 byte, and the structure is R/R/E/LCID.

R occupies lbit, is reserved; E occupies lbit, indicating that the subheader is followed by another R-MAC PDU subheader, or the beginning of the payload; LCID occupies 5 bits, indicating the MAC CE of the subheader or The related attribute of the MAC SDU; F occupies lbit, indicating the length of the L area; L occupies 7 bits or 15 bits, and is used to indicate the information length of the MAC SDU corresponding to the sub-header.

8. The method of claim 5, wherein

When the MAC CE and/or the MAC SDU corresponding to the n sub-headers in the second sub-header area of the S sub-header belong to the RN, the Node ID in the S sub-header is the identifier of the RN; when the S sub-head corresponds to When the MAC CE and/or the MAC SDU corresponding to the n sub-headers in the second sub-header belong to the R-UE, the Node ID in the S sub-header is the identifier of the R-UE.

9. The method of claim 5, wherein

When there are two or more S subheaders, the order of encapsulation of each S subheader in the first subheader is the same.

10. The method of claim 5, wherein

Among the n consecutive subheaders in the second subheader region corresponding to the S subheader, the MAC CE subheader is in front and the MAC SDU subheader is in the back.

11. The method of claim 5, further comprising:

The sender performs Padding padding in the R-MAC PDU payload,

The R-MAC PDU header further includes a third sub-header region, where the sender encapsulates in the third sub-header region Corresponding to the sub-head of Padding, it is used to indicate that this R-MAC PDU is Padding filled.

The method according to claim 1, wherein the indication information is a continuous flag bit, or a continuous flag bit and a node identifier, and the step of encapsulating the indication information in the R-MAC PDU header includes:

Transmitting, by the sender, a plurality of R-MAC PDU subheaders in the R-MAC PDU header, where the multiple R-MAC PDU subheaders correspond to MAC CE and MAC SDU in the R-MAC PDU payload And the sender encapsulates at least the attribute and/or length information of the MAC CE or the MAC SDU corresponding to the R-MAC PDU subheader in the current R-MAC PDU subheader, and the continuous flag, where the continuous flag is used for Indicates whether the MAC CE or MAC SDU corresponding to the current R-MAC PDU sub-header and the MAC- or MAC SDU corresponding to the previous R-MAC PDU sub-head belong to the RN or the same R-UE, and do not belong to the RN or the same R. In the case of the UE, the current R-MAC PDU sub-header further includes a node identifier, where the node identifier is used to indicate the node information of the RN or the R-UE to which the MAC SDU or the MAC CE corresponding to the current R-MAC PDU subheader belongs.

13. The method of claim 12, wherein

The R-MAC PDU header includes one or more MAC SDU subheaders corresponding to a MAC SDU, the MAC SDU subheader occupies 3 or 4 or 5 bytes, and its structure is R/D/E/LCID/F/ L/Node ID;

R occupies lbit, is reserved; D occupies lbit, indicating that the MAC corresponding to the R-MAC PDU sub-head is the same R-UE; E occupies lbit, indicating that the sub-header is followed by another R-MAC PDU sub-header , or the start of the payload; the LCID occupies 5 bits, indicating the related attributes of the MAC SDU corresponding to the subheader; F occupies lbit, indicating the length of the L area; L occupies 7 bits or 15 bits, and is used to indicate the MAC corresponding to the subheader The information length of the SDU; the Node ID is 8 bits or 16 bits, and is used to indicate the node identifier of the RN or R-UE to which the MAC SDU corresponding to the R-MAC PDU subheader belongs;

Or, the R-MAC PDU subheader of the corresponding MAC SDU occupies 2 or 3 bytes, and the structure is R/D/E/LCID/F/L, where: R occupies lbit, is reserved; D occupies lbit, indicates The MAC SDU corresponding to the R-MAC PDU subheader and the MAC CE or MAC SDU corresponding to the previous R-MAC PDU subheader belong to the RN or the same R-UE; E occupies 1 bit, indicating that the subheader is followed by another One R-MAC PDU subheader, or the start of the payload; LCID occupies 5 bits, indicating the relevant attributes of the MAC SDU corresponding to the subheader; F occupies 1 bit, indicating the length of the L area; L occupies 7 bits or 15 bits, used to indicate the The length of the information of the MAC SDU corresponding to the subheader.

14. The method of claim 12, wherein

The R-MAC PDU header includes one or more MAC CE subheaders corresponding to the MAC CE, and the MAC CE subheader occupies 2 or 3 bytes, and the structure is R/D/E/LCID/Node ID;

R occupies 1 bit and is reserved. D occupies 1 bit, indicating that the MAC CE corresponding to the R-MAC PDU sub-header and the MAC CE or MAC SDU corresponding to the previous R-MAC PDU sub-head do not belong to the RN or the same R-UE. E occupies lbit, indicating that the subheader is followed by another R-MAC PDU subheader, or the beginning of the payload; LCID occupies 5 bits, indicating the relevant attributes of the MAC CE corresponding to the subheader; Node ID occupies 8 bits Or 16 bits, used to indicate the node identifier of the RN or the R-UE to which the MAC CE corresponding to the sub-header belongs;

Or the corresponding MAC CE subheader occupies 1 byte, and the structure is R/D/E/LCID, where: R occupies 1 bit, is reserved; D occupies 1 bit, indicating MAC corresponding to the R-MAC PDU subheader The MAC CE or MAC SDU corresponding to the previous R-MAC PDU sub-header belongs to the RN or the same R-UE; E occupies 1 bit, indicating that the sub-header is followed by another R-MAC PDU sub-header, or is valid. The start of the load; the LCID occupies 5 bits, indicating the relevant attributes of the MAC CE corresponding to the subheader.

15. The method according to claim 12, wherein the sender encapsulates a MAC CE belonging to the RN and/or m R-UEs, and a MAC SDU belonging to the RN and/or k R-UEs in the R- The steps in the payload of the MAC PDU include:

For MAC CEs and MAC SDUs that belong to the RN or belong to the same R-UE, the MAC CE is encapsulated first and the MAC SDU is encapsulated later.

16. The method of claim 2 or 12, further comprising:

The sender encapsulates a padding pad Padding at the end of the R-MAC PDU payload, and a sub-header corresponding to Padding at the end of the R-MAC PDU header.

17. The method of claim 2 or 12, wherein

When the MAC SDU or MAC CE corresponding to the R-MAC PDU subheader belongs to the RN, When it belongs to the R-UE, the node identifier is an identifier of the R-UE.

18. The method of claim 1 or 2 or 5 or 12, wherein

When the sender is an evolved Node B (eNB), the receiver is an RN; and when the sender is an RN, the receiver is an eNB.

A method for transmitting a media access control (MAC) protocol data unit PDU for a backhaul link, wherein the MAC PDU for a backhaul link is hereinafter referred to as an R-MAC PDU, and the method includes:

The sender transmits a MAC Control Element (CE) belonging to the Relay Station (RN) and/or m Relay Subordinate Terminals (R-UE) to the receiver on the backhaul link, and a MAC belonging to the RN and/or k R-UEs The service data unit (SDU), m, k > 1 and an integer, encapsulates the one or more MAC CEs, and one or more MAC SDUs into R-MAC PDUs, and sends them to the receiver through the physical layer. The sender carries at least the indication information in the R-MAC PDU, and is used to indicate that the RN or the R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU belong respectively.

20. The method of claim 19, wherein the encapsulating the one or more MAC CEs and one or more MAC SDUs as R-MAC PDUs are sent to a receiver via a physical layer, the transmitting The step of the party carrying at least the indication information in the R-MAC PDU includes:

The sender carries a MAC CE of the RN and/or m R-UEs, and a MAC SDU of the RN and/or k R-UEs in the R-MAC PDU payload, in the R-MAC PDU header And carrying a plurality of R-MAC PDU subheaders, where the plurality of R-MAC PDU subheaders correspond to a MAC CE and a MAC SDU in the R-MAC PDU payload, where the sender is in each R-MAC The PDU sub-header carries the attribute and/or length information of the MAC CE or the MAC SDU corresponding to the sub-header, and the indication information, where the indication information is the MAC CE or the MAC SDU corresponding to the R-MAC PDU sub-header. Node information of the RN or R-UE.

The method according to claim 19, wherein the encapsulating the one or more MAC CEs and one or more MAC SDUs as R-MAC PDUs are sent to a receiver via a physical layer, and the sending The step of the party carrying at least the indication information in the R-MAC PDU includes: The sender carries a MAC CE of the RN and/or m R-UEs, and a MAC SDU of the RN and/or k R-UEs in the R-MAC PDU payload, in the R-MAC PDU header Carrying a plurality of R-MAC PDU subheaders, where the R-MAC PDU header includes a first sub-header region and a second sub-header region, and the sender is encapsulated in a first sub-header region of the R-MAC PDU header One or more S subheaders as indication information, encapsulating one or more MAC CE subheaders corresponding to the MAC CE in the second subheader area of the R-MAC PDU header, and one or more corresponding to the MAC SDU a MAC SDU subheader, the subheader in the second subheader region corresponds to a MAC CE and a MAC SDU in the R-MAC PDU payload, and the subheader in the second subheader region is used to indicate Attribute and/or length information of the corresponding MAC CE or MAC SDU; each S subheader in the first subheader region corresponds to n consecutive subheaders in the second subheader region, η > 1 And n is an integer, the MAC CE and/or the MAC SDU in the R-MAC PDU payload corresponding to the n consecutive sub-headers in the second sub-header area belong to the RN or the same R-UE, and the sender is The sub-header information η is carried in the S subheader, And the node information of the RN or the R-UE to which the MAC CE and/or the MAC SDU belong to the R-MAC PDU payload corresponding to the n consecutive sub-headers in the second sub-header.

22. The method of claim 19, wherein the encapsulating the one or more MAC CEs and one or more MAC SDUs as R-MAC PDUs are sent to a receiver via a physical layer, the transmitting The step of the party carrying at least the indication information in the R-MAC PDU includes:

The sender carries a MAC CE of the RN and/or m R-UEs, and a MAC SDU of the RN and/or k R-UEs in the R-MAC PDU payload, in the R-MAC PDU header And carrying a plurality of R-MAC PDU subheaders, where the plurality of R-MAC PDU subheaders correspond to MAC CE and MAC SDU in the R-MAC PDU payload, and the sender is in the current R-MAC PDU. And/or length information, and a continuous flag as the first indication information, the continuous flag is used to indicate a MAC corresponding to the current R-MAC PDU subheader and a MAC corresponding to the previous R-MAC PDU subheader Whether the CE or the MAC SDU belongs to the RN or the same R-UE, and when not belonging to the RN or the same R-UE, the current R-MAC PDU subheader further includes a node identifier as the second indication information, where the node identifier is Node information indicating the MAC SDU or the RN or R-UE to which the MAC RDU corresponding to the current R-MAC PDU subheader belongs.

23. A method according to any of claims 19-22, wherein When the sender is an evolved Node B (eNB), the receiver is an RN; and when the sender is an RN, the receiver is an eNB.

24. A method for receiving a medium access control (MAC) protocol data unit (PDU) for a backhaul link, wherein the MAC PDU for a backhaul link is hereinafter referred to as an R-MAC PDU, and the method includes:

The receiver receives the R-MAC PDU sent by the sender, the R-MAC PDU includes an R-MAC PDU header and an R-MAC PDU payload, and the receiver decapsulates a plurality of Rs from the R-MAC PDU header a MAC PDU subheader that decapsulates one or more MAC Control Elements (CEs) and one or more MAC Service Data Units from the R-MAC PDU payload according to an indication of each R-MAC PDU subheader ( SDU), and according to the indication information carried in the R-MAC PDU header, the relay station (RN) or the relay station subordinate terminal (R-UE) to which the MAC CE and the MAC SDU in the R-MAC PDU payload belong respectively are known.

25. The method of claim 24, wherein the decapsulating one or more MAC CEs from the R-MAC PDU payload according to an indication of each R-MAC PDU subheader, and one or more The step of obtaining, by the MAC SDU, the RN or the R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload belong respectively according to the indication information carried in the R-MAC PDU header includes:

Determining, by the receiving end, the attribute and/or length information of the MAC CE or MAC SDU corresponding to the current subheader from each R-MAC PDU subheader, and the node identifier as the indication information, according to the obtained attribute and/or The length information decapsulates one or more MAC CEs from the R-MAC PDU payload, and one or more MAC SDUs, based on the obtained RN or R-UE.

26. The method of claim 24, wherein the receiver decapsulates a plurality of R-MAC PDU subheaders from an R-MAC PDU header, from the indication according to each R-MAC PDU subheader

Decapsulating one or more MAC CEs and one or more MAC SDUs in the payload of the R-MAC PDU, and obtaining the MAC CE in the R-MAC PDU payload according to the indication information carried in the R-MAC PDU header The steps of the RN or the R-UE to which the MAC SDU belongs respectively include: The receiving side decapsulates one or more S subheaders as indication information from the first subheader area of the R-MAC PDU header, and obtains the subheader quantity information n and the node identifier from the S subheader, n > 1 and n is an integer, decapsulating n consecutive MAC CE subheaders and/or MAC SDU subheaders from the second subheader region of the R-MAC PDU header according to the n, according to the node Identifying the node information of the RN or R-UE to which the MAC CE and/or the MAC SDU belong to the above, and the consecutive sub-headers in the second sub-header area and the MAC CE and MAC in the R-MAC PDU payload The SDUs are in a one-to-one correspondence, and the receiving party learns the attribute and/or length information of the MAC CE or the MAC SDU corresponding to the sub-head according to the indication in the sub-header in the second sub-head area, according to the attribute and / or length information decapsulates one or more MAC CEs, and one or more MAC SDUs from the R-MAC PDU payload.

27. The method of claim 24, wherein the decapsulating one or more MAC CEs from the R-MAC PDU payload according to an indication of each R-MAC PDU subheader, and one or more The step of obtaining, by the MAC SDU, the RN or the R-UE to which the MAC CE and the MAC SDU in the R-MAC PDU payload belong respectively according to the indication information carried in the R-MAC PDU header includes:

Determining, by the receiving party, the attribute and/or length information of the MAC CE or MAC SDU corresponding to the current sub-head from each R-MAC PDU sub-header, according to the attribute and/or length information, from the R-MAC Decapsulating one or more MAC CEs and one or more MAC SDUs in the PDU payload, the receiver also decapsulating a continuous flag as the first indication information from each R-MAC PDU subheader, The receiving party learns, according to the continuous flag, whether the MAC CE or MAC SDU corresponding to the current R-MAC PDU subheader and the MAC CE or MAC SDU corresponding to the previous R-MAC PDU subhead belong to the RN or the same R-UE. The continuous flag indicates that the MAC CE or the MAC SDU corresponding to the current R-MAC PDU sub-head does not belong to the RN or the same R-UE, and the receiver is from the MAC or MAC SDU corresponding to the previous R-MAC PDU sub-header. The R-MAC PDU sub-header decapsulates the node identifier as the second indication information, and the receiver learns, according to the node identifier, the MAC SDU corresponding to the current R-MAC PDU sub-header or the RN to which the MAC CE belongs. Or R-UE.

28. The method of any of claims 24-27, wherein The receiver is an evolved Node B (eNB) or an RN.

29. A medium access control (MAC) protocol data unit (PDU) transmission system for a backhaul link, wherein the MAC PDU for a backhaul link is hereinafter referred to as an R-MAC PDU, and the system includes a transmitting device and Receiving device

The transmitting device is configured to: belong to a relay station (RN) and/or m relay station subordinate terminals

The MAC Control Element (CE) of (R-UE), and the MAC Service Data Unit (SDU) belonging to the RN and/or k R-UEs are encapsulated in the R-MAC PDU payload, m, k > 1 and an integer Decapsulating at least the indication information in the R-MAC PDU header, and sending the encapsulated R-MAC PDU to the receiving device;

30. The system of claim 29, wherein the transmitting device comprises a packaging unit and a transmitting unit;

The sending unit is configured to: send the encapsulated R-MAC PDU;

The encapsulating unit is configured to: encapsulate one or more MAC CEs, and one or more MAC SDUs in an R-MAC PDU payload, and encapsulate the indication information in an R-MAC PDU header;

The encapsulating unit is configured to encapsulate the R-MAC PDU header by one of the following methods: encapsulating a plurality of R-MAC PDU subheaders in the R-MAC PDU header, the multiple R-MAC PDUs The subheader corresponds to the MAC CE and the MAC SDU in the R-MAC PDU payload, and encapsulates the attributes of the MAC CE or MAC SDU corresponding to the R-MAC PDU subheader in the R-MAC PDU subheader. And the length information, and the indication information, where the indication information is the node information of the RN or the R-UE to which the MAC CE or the MAC SDU corresponding to the R-MAC PDU subheader belongs;

Encapsulating one or more S as indication information in a first sub-header region of the R-MAC PDU header a sub-header, in the second sub-header area of the R-MAC PDU header, encapsulating one or more MAC CE sub-headers corresponding to the MAC CE, and one or more MAC SDU sub-heads corresponding to the MAC SDU, encapsulated in the The sub-header in the second sub-header area corresponds to the MAC CE and the MAC SDU in the R-MAC PDU payload, and is used to indicate the attribute and/or length information of the MAC CE or MAC SDU corresponding to the sub-header; Each S subheader encapsulated in the first subheader region corresponds to n consecutive subheaders in the second subheader region, η > 1 and n is an integer, and the second subheader region is n The MAC CE and/or the MAC SDU in the R-MAC PDU payload corresponding to the consecutive sub-headers belong to the RN or the same R-UE, and the sub-head number information n is encapsulated in the S sub-header, and Node information of the RN or R-UE to which the MAC CE and/or the MAC SDU belong to the R-MAC PDU payload corresponding to the n consecutive sub-headers in the second sub-header;

Encapsulating a plurality of R-MAC PDU subheaders in the R-MAC PDU header, the plurality of R-MAC PDU subheaders corresponding to MAC CE and MAC SDU in the R-MAC PDU payload, at or MAC The attribute and/or length information of the SDU, and the continuous flag, the continuous flag is used to indicate the MAC CE or MAC SDU corresponding to the current R-MAC PDU subheader and the MAC CE or MAC corresponding to the previous R-MAC PDU subheader Whether the SDU belongs to the RN or the same R-UE. When not belonging to the RN or the same R-UE, the current R-MAC PDU subheader further includes a node identifier, where the node identifier is used to indicate the current R-MAC PDU subheader. The node information of the RN or R-UE to which the corresponding MAC SDU or MAC CE belongs.

31. The system of claim 29, wherein the receiving device comprises a decapsulation unit and a node validation unit;

The decapsulation unit is configured to: decapsulate the indication information from the R-MAC PDU header, decapsulate one or more MAC CEs from the R-MAC PDU payload, and one or more MAC SDUs ;

32. The system of claim 31, wherein

The decapsulation unit is configured to: decapsulate multiple from the R-MAC PDU header The R-MAC PDU sub-header decapsulates the attribute and/or length information of the MAC CE or MAC SDU corresponding to the current sub-header from each R-MAC PDU sub-header, and the node identifier as the indication information, according to the obtained attribute And/or length information decapsulating one or more MAC CEs from the R-MAC PDU payload, and one or more MAC SDUs;

The node acknowledgment unit is configured to: learn, according to the obtained node identifier, an RN or an R-UE to which the MAC CE or the MAC SDU corresponding to the R-MAC PDU subhead corresponding to the node identifier is located.

33. The system of claim 31, wherein

The decapsulation unit is configured to: decapsulate one or more S subheaders as indication information from a first subheader region of the R-MAC PDU header, from a second subhead of the R-MAC PDU header The header area decapsulates one or more MAC CE subheaders corresponding to the MAC CE, and one or more MAC SDU subheaders corresponding to the MAC SDU, according to the indication in the subheader in the second subheader area Attribute and/or length information of the MAC CE or MAC SDU corresponding to the sub-header, decapsulating one or more MAC CEs from the R-MAC PDU payload according to the attribute and/or length information, and One or more MAC SDUs; and decapsulating sub-head number information n and node identifiers from the S sub-headers, η > 1 and n being an integer;

The node confirming unit is configured to: learn, according to the sub-head number information n and the node identifier, an R-MAC PDU payload corresponding to n consecutive sub-heads in the second sub-head area corresponding to the S sub-header The RN or R-UE to which the MAC CE and/or MAC SDU belong.

34. The system of claim 31, wherein

The decapsulating unit is configured to: decapsulate a plurality of R-MAC PDU subheaders from the R-MAC PDU header, and decapsulate the MAC CE corresponding to the current subheader from each R-MAC PDU subheader Or attribute and/or length information of the MAC SDU, decapsulating one or more MAC CEs, and one or more MAC SDUs from the R-MAC PDU payload according to the attribute and/or length information, Decapsulating a continuous flag as the first indication information in the R-MAC PDU sub-header, and decapsulating the node identifier as the second indication information from the R-MAC PDU sub-head according to the notification of the node acknowledgment unit; The node confirming unit is configured to: learn the current R-MAC PDU according to the continuous flag Whether the MAC CE or MAC SDU corresponding to the sub-header and the MAC- or MAC SDU corresponding to the previous R-MAC PDU sub-head belong to the RN or the same R-UE, and the continuous flag indicates that the current R-MAC PDU sub-header corresponds to When the MAC CE or the MAC SDU corresponding to the previous R-MAC PDU sub-head does not belong to the RN or the same R-UE, the decapsulation unit is notified to decapsulate the node identifier, according to the decapsulation unit. The RN or R-UE decapsulated in the R-MAC PDU subheader.

35. A device for transmitting media access control (MAC) protocol data units (PDUs) for a backhaul link, wherein the MAC PDU for a backhaul link is hereinafter referred to as an R-MAC PDU, The transmitting device includes a packaging unit and a transmitting unit;

The encapsulation unit is configured to: one or more MAC Control Elements (CEs) belonging to a Relay Station (RN) and/or m Relay Subordinate Terminals (R-UEs), and RNs and/or k R-UEs One or more MAC Service Data Units (SDUs) are encapsulated in the R-MAC PDU payload, m, k > l and are integers, and are used to encapsulate the indication information in the R-MAC PDU header;

The sending unit is configured to: send the encapsulated R-MAC PDU.

The transmitting device according to claim 35, wherein

Encapsulating one or more S subheaders as indication information in a first subheader region of the R-MAC PDU header, and encapsulating one or more corresponding to a MAC CE in a second subheader region of the R-MAC PDU header MAC CE subheader, and one or more MAC SDU subheaders corresponding to the MAC SDU, the subheaders encapsulated in the second subheader region and the MAC CE and MAC SDU in the R-MAC PDU payload - Corresponding to, indicating the genus of the MAC CE or MAC SDU corresponding to the subheader And/or length information; each S subheader encapsulated in the first subheader region corresponds to n consecutive subheaders in the second subheader region, η > 1 and n is an integer, the The MAC CE and/or the MAC SDU in the R-MAC PDU payload corresponding to the n consecutive sub-headers in the two sub-headers belong to the RN or the same R-UE, and the sub-header is encapsulated in the S sub-header The quantity information n, and the node information of the RN or the R-UE to which the MAC CE and/or the MAC SDU belong to the R-MAC PDU payload corresponding to the n consecutive sub-headers in the second sub-header area;

37. A receiving device for a MAC protocol data unit PDU for a backhaul link, wherein the MAC PDU for a backhaul link is hereinafter referred to as an R-MAC PDU, and the receiving device comprises a decapsulation unit and a node confirming unit;

The decapsulation unit is configured to: decapsulate the indication information from the R-MAC PDU header; decapsulate one or more MAC Control Elements (MAC CE) from the R-MAC PDU payload, and a Or multiple MAC Service Data Units (MAC SDUs);

38. The receiving device according to claim 37, wherein

The decapsulation unit is configured to: decapsulate multiple from the R-MAC PDU header

The R-MAC PDU sub-header decapsulates the attribute and/or length information of the MAC CE or MAC SDU corresponding to the current sub-header from each R-MAC PDU sub-header, and the node identifier as the indication information, according to the obtained attribute And/or length information is decapsulated from the R-MAC PDU payload Or multiple MAC CEs, and one or more MAC SDUs;

39. The receiving device of claim 37, wherein

40. The receiving device according to claim 37, wherein

The decapsulating unit is configured to: decapsulate a plurality of R-MAC PDU subheaders from the R-MAC PDU header, and decapsulate the MAC CE corresponding to the current subheader from each R-MAC PDU subheader Or attribute and/or length information of the MAC SDU, decapsulating one or more MAC CEs, and one or more MAC SDUs from the R-MAC PDU payload according to the attribute and/or length information, Decapsulating a continuous flag as the first indication information in the R-MAC PDU sub-header, and decapsulating the node identifier as the second indication information from the R-MAC PDU sub-head according to the notification of the node acknowledgment unit; The node confirming unit is configured to: determine, according to the continuous flag, whether a MAC CE or a MAC SDU corresponding to a current R-MAC PDU subheader and a MAC CE or a MAC SDU corresponding to a previous R-MAC PDU subhead belong to an RN or The same R-UE, when the consecutive flag indicates that the MAC CE or MAC SDU corresponding to the current R-MAC PDU subhead corresponds to the previous R-MAC PDU subheader When the MAC CE or the MAC SDU does not belong to the RN or the same R-UE, the decapsulating unit is notified to decapsulate the node identifier, and the RN or R is decapsulated from the R-MAC PDU subhead according to the decapsulation unit. -UE.