WO2010051775A1 - Method, device and system for data transmitting - Google Patents

Abstract

The invention discloses a method, device and system for data transmitting. Ingress Station packages or fragments the Service Data Units (SDUs) transmitted using the same Tunnel, encapsulates them into Relay Medium Access Control Packet Data Unit (MAC PDU) and sends the Relay MAC PDU to Egress Station, wherein the Relay MAC PDU includes a Tunnel-Connection Identifier (T-CID). The device includes package unpacking module, classification mapping module and ability negotiating module. The system includes base stations and relay stations. The invention reduces a number of packages of information in the data transfer process and saves system resources.

Description

 Method, device and system for data transmission

The present application claims the priority of the Chinese application filed on November 7, 2008, the application number is CN200810217410.6, entitled "A Method, Apparatus and System for Data Transmission", the entire contents of which are incorporated herein by reference. In the application. Technical field

 The present invention relates to communication technologies, and in particular, to a method, device and system for data transmission. Background technique

 The components of the mobile communication system include:

 BS (Base Station Base Station) and RS (Relay Station Relay Station) and terminals, including MS or SS (Mobile Station Mobile Terminal Subscriber Station User Terminal).

 In a mobile communication system, the transmission of data and signaling in an air interface is based on a connection, and each connection has its own CID (Connection Identifier Connection Identifier) as an identifier. The sender classifies the SDU (Service Data Unit) to be sent to each connection, and performs packetization or fragmentation to construct a MAC PDU (Medium Access Control Packet Data Unit). The CID is carried in the MAC header. If a fragment of an SDU is encapsulated in the MAC PDU, the FSH (Fragmentation Subheader sub-header) needs to be identified between the different SDUs. If the MAC PDU encapsulates multiple SDUs or fragments including different SDUs, the difference is different. The SDU needs to be identified by PSH (Packing Subheader). The MAC PDU further includes a CRC (Cyclic Redundancy Check) for verifying whether the data transmitted by the constructed MAC PDU in the communication line is successfully received.

 After the sender completes the construction of the MAC PDU, the RS forwards through the tunnel-based relay forwarding mode.

In this transmission mode, multiple MAC PDUs from different connections can be encapsulated into one Relay MAC PDU to be transmitted on one tunnel. Different tunnels are classified according to different QoS (Quality of Service). The Relay MAC PDU includes a Relay MAC header and an R-CRC (Relay-cyclic Redundancy Check). Carrying the connection identifier T-CID (Tunnel-Connection Identifier) for data transmission in the Relay MAC header or for transmitting management messages MT-CID (Management Tunnel-Connection Identifier). The Relay MAC PDU further includes: an FSH, which is used to identify a fragment of a TDU, and a PSH, which is used to identify different TDUs or fragments of different TDUs. The tunnel includes: a tunnel entrance occupying an Ingress Station, optionally, an Intermediate Station in the middle of the tunnel, and an Egress Station at the tunnel exit station. The Ingress Station is configured to encapsulate the MAC PDU into a Relay MAC PDU; the Intermediate Station forwards a Relay MAC PDU based on a T-CID or an MT-CID; and the Egress Station is responsible for restoring the Relay MAC PDU to a MAC PDU.

 In the prior art, the Relay MAC PDU includes the package information of the Relay MAC header, the R-CRC, and the like, and also includes the MAC header, PSH, FSH, and CRC in the original MAC PDU. Inspection) and other packaging information. When the number of users is large and the length of the service data packet is small, the encapsulated information carried in the Relay MAC PDU transmitted on the tunnel consumes a large system bandwidth, which causes the system throughput to decrease. Summary of the invention

 Embodiments of the present invention provide a data transmission method, apparatus, and system, which effectively reduce package information required for transmitting data.

On the one hand, a data transmission method is provided. The tunnel ingress station encapsulates or fragments a service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU. The MAC PDU includes a tunnel connection identifier T-CID, and the relay MAC PDU is sent to the tunnel egress station Egress Station. On the other hand, a relay station is provided, including a package module and a sending module, where the encapsulation module is used for the same The service data unit SDU transmitted by the tunnel tunnel is packaged or fragmented and encapsulated into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID, and the relay MAC PDU is sent to the The sending module is configured to send the Relay MAC PDU to the BS. In another aspect, a base station is provided, including a packaging module, a sending module, where the encapsulating module is used to transmit using the same tunnel tunnel. The service data unit SDU is packed or fragmented and encapsulated into a relay medium access control protocol data unit Relay MAC PDU, the Rel The ay MAC PDU includes a tunnel connection identifier T-CID, and the relay MAC PDU is sent to the sending module, and the sending module is configured to send the Relay MAC PDU to the relay station. On the other hand, a data transmission system is provided. , including BS and RS, the RS is used to The received MAC PDU is unpacked or unpacked and assembled into an SDU, and the service data unit SDU transmitted by using the same tunnel tunnel is packaged or fragmented and encapsulated into a relay medium access control protocol data unit Relay MAC PDU, the Relay MAC The PDU includes a tunnel connection identifier T-CID, and the relay MAC PDU is sent to the BS. The BS is used to unpack or unpack the received Relay MAC PDU into an SDU, according to the value of the T-CID. The SDU is mapped to the corresponding Data_path by CS packet classification.

 The ingress station of the ingress station encapsulates or shards the SDUs to be directly encapsulated into a Relay MAC PDU, instead of encapsulating the MAC PDU into a Relay MAC PDU, as in the prior art. The Relay MAC PDU does not include information such as MAC header CRC PSH FSH, so the bandwidth is reduced during data transmission, the throughput of the system is increased, and the transmission efficiency is greatly improved.

DRAWINGS

The drawings used in the examples or the description of the prior art are described in a single manner. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art do not pay Other drawings can also be obtained from these drawings on the premise of creative labor. 1 is a schematic diagram of a network architecture applied to an embodiment of the present invention; FIG. 2 is a schematic diagram of a data transmission method according to an embodiment of the present invention;

Intent ^ , - , ^

Schematic diagram of construction and transmission;

FIG. 6 is a schematic structural diagram of a Relay MAC PDU according to an embodiment of the present invention; FIG. 7 is a flowchart of a method for constructing and transmitting a Relay MAC PDU according to an embodiment of the present invention; FIG. 8 is a schematic structural diagram of a relay station according to an embodiment of the present invention; FIG. 9 is a schematic diagram of a base station according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention.

detailed description

 The embodiments of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments.

 It can be understood that the embodiment of the present invention can be applied to the IEEE 802.16j standard, and is also applicable to other situations in which the relay technology is used for transmission and the RS can relay data using the tunnel-based forwarding mode. The following is IEEE 802.16j or WiMAX. The description by way of example does not limit the invention.

 The tunnel site in the embodiment of the present invention includes a tunnel entrance station Ingress Station and a tunnel exit station Egress Station. Further, the intermediate station may also be included. The Ingress Station in the embodiment of the present invention is a 13⁄4 way tunnel entry station, which refers to a station where a data packet enters a tunnel; an Egress station is a tunnel exit station, which refers to a station where a data packet exits a tunnel; and an intermediate station refers to an ingress at a tunnel entrance station. The station between the station and the egress station of the tunnel egress station; the access RS refers to a relay station that directly provides a connection to the network for the terminal SS/MS.

 The data transmission between the base station and the terminal SS/MS in the embodiment of the present invention may be classified into downlink data transmission, for example, data transmission from the BS to the terminal SS/MS; uplink data transmission, for example, from the terminal SS/MS Data transfer to the BS.

 The network architecture to which the embodiment of the present invention is applied will be described below with reference to FIG.

 BS: A device that provides connectivity, management, and control for relay stations and terminals.

 RS (Relay Station), including RS1 and RS2 in the figure, a device that relies on the BS to provide connectivity for other RSs or terminals. Some RSs can also provide management and control for subordinate RSs or terminals. The air interface between the RS and the terminal SS/MS is the same as the air interface between the BS and the terminal SS/MS. As shown in the figure, RS2 directly provides the terminal SS/MS with a connection to the network, which is called access RS.

 Terminal SS/MS (Mobile Station, Subscriber Station): The user accesses the network using the terminal SS/MS.

In Figure 1, the data transmission from the BS through RS1 to RS2 to the terminal SS/MS is downlink data transmission; the data transmission by the terminal SS/MS through RS2 to RS1 to the BS is uplink data transmission. The RS1 and RS2 do not limit the number and order of RSs. For example, in FIG. 1, if a tunnel can be used to transmit data between the base station BS and the RS2, in the uplink data transmission, RS2 is the tunnel entry station Ingress Station, and BS is the tunnel exit station Egress Station. , RSI is stated In the downlink data transmission, the BS is the tunnel entry station Ingress Station, RS2 is the tunnel exit station Egress Station, and the RSI is the Intermediate Statiori.

 The data transmission method provided by the embodiment of the present invention is described below with reference to FIG. 2 .

 The tunnel entry station Ingress Station packs or fragments the service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID, which will The Relay MAC PDU is sent to the tunnel egress station Egress Station. The Relay MAC PDU further includes a Relay MAC Header, PSH, FSH, and R-CRC, and the Relay MAC Header further includes a tunnel connection identifier T-CID. In the figure, SDU1, SDU2, SDU3, and SDU4 are SDUs that use the same tunnel, and SDU41 and SDU42 are two shards of the SDU4.

 The data transmission is performed according to the method in the second embodiment of the present invention. The transmitted Relay MAC PDU no longer contains the encapsulation information such as the PSH, FSH, and CRC originally included in the MAC Header and the MAC PDU, and only includes the Relay MAC Header, R- The CRC and the PSH or FSH that identify different SDUs reduce the resources occupied in the tunnel transmission and save system resources.

 The above data transmission may be an uplink data transmission or a downlink data transmission. The following data transmission is taken as an example for detailed description. The construction and transmission process of the uplink data relay MAC PDU provided by the embodiment of the present invention is described below with reference to FIG. 3 . . The specific steps are as follows:

 Step 301: The terminal SS/MS sends the SDU that needs to be transmitted, and is packaged or fragmented into a MAC PDU suitable for transmission according to the actual condition of the network, and the MAC PDU is sent to the access RS. The access RS may be an Ingress Station. Optionally, if the access RS does not use a tunnel for data transmission, the MAC PDU is sent to the Ingress Station.

 Step 302: After receiving the MAC PDU, the Ingress Station unpacks or unpacks the MAC PDU into an SDU. The MAC PDUs can come from different terminals.

 Step 303: The Ingress Station uses the SDUs transmitted by the same tunnel to be packaged or fragmented according to the current network condition, and is encapsulated into a Relay MAC PDU suitable for network transmission, and sent to the superior RS. The superior RS may be an Intermediate Station or an Egress Station. The Relay MAC PDU is identified by the tunnel connection identifier T-CID in the Relay MAC Header. The T-CID is allocated in the DSA or DSC negotiation between the BS and the Ingress Station.

Optionally, in step 304, the Relay MAC PDU sent by the Intermediate Station ^i'J Ingress Station or the Intermediate Station is unpacked or unpacked into SDUs. The status packet or fragment is encapsulated into a Relay MAC PDU, and the Relay MAC PDU is sent to the Egress Station.

 Step 306: The Egress station, if it is a BS, receives the Relay MAC PDU, performs unpacking or unsharding into an SDU, and performs the CS packet classification mapping on the SDU to be mapped to the corresponding Data Path. Optionally, the Egress station may also be an RS, and the RS may unpack or unpack the received Relay MAC PDU into an SDU, and then package or package the Relay MAC PDU according to the current network status. The MAC PDU is sent to the BS, and the BS unpacks or defragmentes the MAC PDU into an SDU, and maps the SDU classification to the corresponding Data Path.

Preferably, the construction and transmission process of the extended sub-header such as the bandwidth request sub-header is included in the uplink MAC PDU. ; ' , ' , ^N ' ,

 Step 401: After receiving the MAC PDU, the Ingress Station, if it finds that the MAC PDU includes an extended subheader Extend Subheader, unpacks the MAC PDU into three parts: an SDU, a MAC Header, and an Extend. The unpacked SDUs are transmitted according to the method described in Embodiment 3; the MAC headers and Extends of the same MAC PDU are combined.

 Step 402: The Ingress Station packages the MAC Header and Extend that are transmitted by using the same tunnel according to the current network status, and encapsulates the management message Relay MAC PDU suitable for network transmission, and sends the message to the upper-level RS. The upper-level RS may be an Intermediate Station or an Egress. The MAC Header and Extend in the different MAC PDUs use the PSH as an identifier, and use the PSH to identify MAC Headers and Extends from different MAC PDUs.

 Optionally, in step 403, the intermediate station receives the management message Relay MAC PDU described in step 402, and then unpacks and restores it to MAC Header and Extend.

 Optionally, in step 404, the Intermediate Station is packaged according to the current network condition, and is encapsulated into a management message Relay MAC PDU suitable for network transmission, and sent to the Egress Station.

Step 405: The Egress station, if it is a BS, receives the management message Relay MAC PDU, and then unpacks and restores it to MAC Header and Extend, and performs corresponding control according to the MAC Header and Extend. Optionally, if the Egress station is an RS, the RS unpacks the received management message Relay MAC PDU into a MAC Header and an Extend, and then packages the MAC PDU to be sent to the BS, where the BS pair It is unpacked and restored to MAC Header and Extend, and corresponding control according to the MAC Header and Extend. In the embodiment, the Ingress Station may be a base station, and the Egress Station may be an access RS or other RSs.

 Step 501: The BS receives the SDU from the upper layer network.

 Step 502: The BS, that is, the Ingress Station, packs or fragments the SDUs that are transmitted by using the same tunnel, and encapsulates them into a Relay MAC PDU and transmits the SDUs to the subordinate RS. The Relay MAC PDU is identified in the Relay MAC Header using the T-CID. The T-CID is allocated in the DSA or DSC negotiation between the BS and the Egress Station. Optionally, if the BS is not an Ingress Station, the BS packs or fragments the received SDU into a MAC PDU and forwards the data to the Ingress Station through the RS, where the Ingress Station packages or divides the SDUs that are transmitted by using the same tunnel. The chip is encapsulated into a Relay MAC PDU and transmitted to the lower level RS. The lower level RS may be an Egress Station, and may alternatively be an Intermediate Station.

 Optionally, in step 503, after receiving the Relay MAC PDU described in step 502, the intermediate station unpacks or de-shards into an SDU. The actual situation is packaged or fragmented, encapsulated into a Relay MAC PDU suitable for network transmission, and sent to the Egress Station.

 Step 505: After receiving the Relay MAC PDU, the Egress Station unpacks or unpacks the SDU into an SDU.

 Step 506: The Egress station maps the SDU classification described in step 505 to the corresponding connection of the corresponding terminal according to the classification mapping information sent by the BS, and the classification mapping information is sent by the BS to the DSA/DSC message. RS.

In step 507, the Egress station encapsulates the mapped SDU into a MAC PDU and sends it to the corresponding terminal SS/MS. Optionally, if the Egress station is not an access RS, the Egress station may send the MAC PDU to an access RS, where the access RS sends the MAC PDU to a corresponding terminal SS/MS. In the embodiment of the present invention, the Relay MAC PDU is constructed by packing or fragmenting an SDU. The uplink transmission data is the same as the Relay MAC PDU structure in the downlink transmission data. Place Transmission of data; The Relay MAC PDU 603 is used for transmission with an extended sub-header management message, and the extension sub-header is included in an uplink MAC PDU.

 The specific structure of the Relay MAC PDU 601 includes:

 The Relay MAC header, which includes a connection identifier T-CID for identifying data transmission in the tunnel transmission mode.

 PSH, used to identify different SDUs or fragments of different SDUs.

 R-CRC, used to verify the integrity of the data transmitted by the constructed Relay MAC PDU in the communication line.

 The Relay MAC PDU 602 includes a slice of an SDU, and its specific structure includes: a Relay MAC header, which includes a connection identifier T-CID for identifying data transmission in the tunnel.

 FSH, used to identify a slice of the one SDU. SDU11 in the figure is a slice of SDU1.

 R-CRC, used to verify the integrity of the data transmitted by the constructed Relay MAC PDU in the communication line.

 The specific structure of the Relay MAC PDU 603 includes:

 The Relay MAC header, which includes a connection identifier T-CID for identifying the management message transmission in the tunnel transmission mode.

 PSH, an extended subheader used to identify different MAC PDUs.

 MAC header, which includes the CID used to identify different connections.

 Extend, an extended subheader, can include a wideband request subheader. The extended subheader is included in the uplink MAC PDU.

 R-CRC, used to verify the integrity of the data transmitted by the constructed Relay MAC PDU in the communication line.

 The Relay MAC PDU constructed in the embodiment of the present invention does not include the PSH, FSH, CRC and other encapsulation information originally included in the MAC Header and the MAC PDU, and only includes the Relay MAC Header, the R-CRC, and the SDU for identifying different SDUs. PSH or FSH saves system resources.

The specific implementation flow of the Relay MAC PDU construction and transmission method provided by the embodiment of the present invention is described below with reference to FIG. 7. In this embodiment, the BS and the access RS are used as the tunnel entrance station Ingress Station and the tunnel egress station Egress Station as an example. For details, that is, when uplinking, the access RS is used as the tunnel entrance station Ingress Station, and the BS is the tunnel exit station Egress Station. In the downlink, the BS is the tunnel entrance station Ingress Station, and the access RS is the tunnel exit station Egress Station. Step 701: When the RS is connected to the network, the BS performs capability negotiation with the RS, and determines that the RS has the capability to construct and transmit the Relay MAC PDU provided by using the embodiment of the present invention.

 Preferably, in the embodiment of the present invention, before data transmission, the BS and the RS may perform capability negotiation first, for example, by adding a corresponding Bit flag in the REG-REQ/RSP message to negotiate to determine that the RS has the capability described. Preferably, the Bit flag may be a bit #3 in the RS MAC feature support TLV in the REG-REQ/RSP message, and the Bit #3: unpacking and unfragment MAC PDU to SDU is defined. Bit #3 in the RS MAC feature support TLV and the ability to transmit in Bit #1 in the BS and RS MAC feature support TLV in the REG-REQ/RSP message. The process of the capability negotiation is as follows: the ingress station and the egress station are included, and the tunnel station of the intermediate station also sends a REG-REQ message to the base station BS to perform capability negotiation, where the message carries the indication that the tunnel site is constructed and transmitted. The bit flag of the capability of the Relay MAC PDU, the tunnel station receiving a REG-RSP message from the BS, the message carrying a bit flag indicating the ability of the BS to construct and transmit the Relay MAC PDU. In an embodiment, the REG-REQ may be a first request message, and the tunnel site performs a network access operation, where the tunnel site includes an Ingress Station and an Egress Station, and the tunnel station sends the first to the base station BS during the network access operation. A request message carries the capability negotiation, where the first request message carries a flag indicating that the tunnel station is capable of constructing and transmitting the Relay MAC PDU; the tunnel station receives a first response message from the BS, where The first response message carries a flag indicating that the BS constructs and transmits the Relay MAC PDU, and the first response message may be a REG-RSP message.

 Step 702: The QoS parameter negotiation and the classification mapping information are sent on the tunnel before the BS is connected to the terminal.

 After the BS establishes a tunnel connection with the access RS, when there is data to be transmitted, it is necessary to establish a connection between the BS and the terminal. Before the connection with the terminal is established, the BS negotiates with the access RS to perform DSA or DSC, and modifies the QoS parameters of the corresponding tunnel to meet the QoS requirements of all connections on the tunnel. At the same time, the BS sends the classified mapping information of the connection to the access RS in the DSA/DSC message, so that the access RS maps the received data classification to the connection of each terminal. The process of performing QoS negotiation on a DSA or DSC message is:

The ingress station or the egress station receives the DSA/DSC Req message from the BS, where the DSA/DSC Req message carries the tunnel QoS parameter, and is carried according to the DSA/DSC Req message. The QoS parameter and the QoS parameter of the band determine the QoS parameter of the tunnel, and generate a DSA/DSC Rsp message, where the DSA/DSC Rsp message carries the determined tunnel QoS parameter, and sends the DSA/DSC Rsp message to the BS. In an embodiment, the DSA/DSC Req message may be a second request message, and the DSA/DSC Rsp may be a second response message, where the tunnel entry station Ingress Station packages the service data unit SDU transmitted by using the same tunnel tunnel or Before the fragmentation, the ingress station or the egress station receives the second request message from the base station BS, where the second request message carries the first tunnel quality of service QoS parameter; according to the QoS parameter and the carried in the second request message The capability of the ingress station or the egress station determines the QoS parameter of the tunnel, and generates a second response message, where the second response message carries the determined tunnel QoS parameter; and sends the second response message to the base station BS So that the base station modifies the QoS parameters on the tunnel to meet the QoS requirements of the connection on the tunnel. In the downlink data transmission, the second request message further carries the classification mapping information; after receiving the Relay MAC PDU from the Ingress Station, the Egress Station unpacks or de-shards the Relay MAC PDU. Forming an SDU; mapping the SDU classification to a corresponding connection according to the classification mapping information; packaging or fragmenting the SDU into a MAC PDU, and transmitting the MAC PDU from the connection to the terminal.

 Step 703, data transmission. The specific encapsulation and transmission method of the uplink data in the tunnel is as described in Embodiment 3 or 6 of the present invention. The specific encapsulation and transmission method of the downlink data in the tunnel is as described in Embodiment 5 or 6 of the present invention.

 A relay station provided by an embodiment of the present invention is described below with reference to FIG. The relay station includes a package module 800 and a sending module 801.

 The encapsulating module 800 is configured to package or fragment a service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID. And sending the Relay MAC PDU to the sending module 801, where the sending module 801 is configured to send the Relay MAC PDU to the BS.

 The relay station further includes a receiving module 803 and a decapsulation module 804.

 The receiving module 803 is configured to receive a MAC PDU from the terminal, and send the MAC PDU to the decapsulation module 804, where the decapsulation module 804 is configured to unpack or unpack the MAC PDU. The SDU is sent to the encapsulation module 800.

The decapsulation module 804 is further configured to: if the MAC PDU includes an extended subheader, The MAC PDU is unpacked or unpacked, and the MAC header and the extended sub-hair in the MAC PDU are sent to the encapsulating module 800, and the encapsulating module 800 is configured to package and encapsulate the MAC header and the extended sub-head into management. a relay MAC PDU, the management relay MAC PDU includes a management tunnel connection identifier MT-CID, and the management relay MAC PDU is sent to the sending module, and the relay station further includes a capability negotiation module 805, ', , ' The negotiation module 805 is configured to generate a REG-REQ message, where the message carries a bit flag indicating that the relay station constructs and transmits the Relay MAC PDU, and sends the REG-REQ message to the sending module 801. The sending module 801 is further configured to send the REG-REQ message to the BS, where the receiving module 803 is further configured to receive a REG-RSP message from the BS, and send the REG-RSP message to the capability. The negotiation module 805 is further configured to analyze the REG-RSP message, and determine that the BS has the capability of constructing and transmitting the Relay MAC PDU.

 The relay station also includes a tunnel QoS determination module 806,

 The receiving module 803 is further configured to receive a DSA/DSC Req message from the BS, where the DSA/DSC Req message carries a tunnel QoS parameter, and the DSA/DSC Req message is transmitted to the tunnel QoS determining module 806, where the tunnel QoS The determining module 806 determines the QoS parameter of the tunnel according to the QoS parameter and the QoS parameter carried in the DSA/DSC Req message, and generates a DSA/DSC Rsp message, where the DSA/DSC Rsp message carries the determined tunnel QoS parameter, where The sending module 801 is further configured to send the DSA/DSC Rsp message to the BS.

 The relay station further includes a classification mapping module 802,

 The tunnel QoS determining module 806 is further configured to: if the DSA/DSC Req message further carries the classification mapping information, send the classification mapping information to the classification mapping module 802, where the receiving module 803 further uses Receiving the Relay MAC PDU from the BS, and sending the Relay MAC PDU to the decapsulation module 804, where the decapsulation module 804 is further configured to unpack or unpack the Relay MAC PDU into an SDU, The SDU is sent to the classification mapping module 802, and the classification mapping module 802 is configured to map the SDU classification to a corresponding connection according to the classification mapping information, and send the SDU after the classification mapping to The encapsulating module 800 is further configured to package the SDU into a MAC PDU, and send the MAC PDU to the sending module 801, where the sending module 801 is further used to The MAC PDU is sent from the connection to the terminal.

The decapsulation module 804 is further configured to: resolve the MAC PDU or the Relay MAC PDU The SDUs that are assembled or unpacked are subjected to integrity judgment. If the SDUs assembled after unpacking or unfragmentation are incomplete, the incomplete SDUs are discarded.

 A base station according to an embodiment of the present invention is described below with reference to FIG. 9. The base station includes a package module 900 and a sending module 901.

 The encapsulation module 900 is configured to package or fragment a service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID. , , send the Relay MAC PDU to

The base station further includes a receiving module 903, a decapsulation module 904, and a classification mapping module 902. The receiving module 903 is further configured to receive a Relay MAC PDU from the relay station, and send the Relay MAC PDU to the decapsulation module 904. The de-encapsulation module 904 is further configured to de-packet or de-slice the Relay MAC PDU into an SDU, and send the SDU to the classification mapping module 902, where the classification mapping module 902 is configured to take the T-CID according to the T-CID. The mapping between the value and the corresponding Data_path maps the SDU to the corresponding Data_path, and sends the SDU to the sending module 901. The sending module 901 is further configured to map the classified information. The SDU is sent to the upper layer network through the Data_path.

 The base station further includes a capability negotiation module 905,

 The receiving module 903 is further configured to receive a REG-REQ message from the RS, and send the REG-REQ message to the capability negotiation module 905, where the capability negotiation module 905 is configured to analyze and process the REG-REQ message, and generate The REG-RSP message carrying the bit flag indicating the capability of the BS to construct and transmit the Relay MAC PDU is sent to the sending module 901, where the sending module 901 is further configured to use the REG - An RSP message is sent to the RS.

 The base station also includes a tunnel QoS determination module 906,

 The tunnel QoS determining module 906 is configured to generate a DSA/DSC Req message, where the DSA/DSC Req message carries a tunnel QoS parameter and classification mapping information, and the sending module 901 is further configured to use the DSA/DSC Req message. Sending to the relay station, the receiving module 903 is further configured to receive a DSA/DSC Rsp message from the relay station and send it to the tunnel QoS determining module 906, where the tunnel QoS determining module 906 is further configured to perform The DSA/DSC Rsp message determines the tunnel QoS parameters.

 A data transmission system according to an embodiment of the present invention is described below with reference to FIG. The data transmission system includes a BS and an RS.

The RS is used for unpacking or unsharding the received MAC PDU into an SDU, which will enable The service data unit SDU transmitted by the same tunnel tunnel is packaged or fragmented and encapsulated into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID, and the Relay MAC PDU is sent. To the BS, the BS is used to depacketize or de-sliced the received Relay MAC PDU into an SDU, and maps the SDU to the corresponding Data_path according to the value of the T-CID.

 The RS is further configured to: if the MAC PDU includes an extended sub-head, depacket or de-shard the MAC PDU, and package the MAC header and the extended sub-head in the MAC PDU into a Manage Relay MAC PDU. The management relay MAC PDU includes a management tunnel connection identifier MT-CID, and the management relay MAC PDU is sent to the BS.

 The RS is further configured to generate a REG-REQ message, the message carrying a bit flag indicating the ability of the relay station to construct and transmit the Relay MAC PDU, and sending the REG-REQ message to the BS. The MRBS is further configured to analyze and process the REG-REQ message, generate a REG-RSP message carrying a bit flag bit indicating that the BS constructs and transmits the Relay MAC PDU, and send the REG-RSP message to The RS.

 The BS is further configured to generate a DSA/DSC Req message, where the DSA/DSC Req message carries a tunnel QoS parameter and classification mapping information, and sends the DSA/DSC Req message to the RS, where the RS is further used. Determining a QoS parameter of the tunnel according to the QoS parameter and the QoS parameter carried in the DSA/DSC Req message, and generating a DSA/DSC Rsp message, where the DSA/DSC Rsp message carries the determined tunnel QoS parameter, and the DSA/ A DSC Rsp message is sent to the BS.

 The BS is further configured to package or fragment the SDUs that are received by the same tunnel from the upper layer network into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T- a CID, the relay MAC PDU is sent to the RS, and the RS is further used for unpacking or de-slicing the received Relay MAC PDU into a new SDU, and the new The SDU is mapped to the corresponding connection, and the SDU is packaged or fragmented into a MAC PDU, and the MAC PDU is sent to the terminal.

 A network node according to an embodiment of the present invention is described below with reference to FIG. 11, and the network node includes: a package module and a sending module.

 The encapsulating module is configured to package or fragment a service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID ;

 The sending module is configured to send the Relay MAC PDU to a second network node.

The network node is a relay station, and the network node further includes a receiving module and a decapsulation module. The receiving module is configured to receive a MAC PDU from the terminal, and send the MAC PDU to the decapsulation module;

 The decapsulation module is configured to depacket or defragment the MAC PDU into an SDU, and send the SDU to the encapsulation module.

 The network node is a relay station, and the second network node is a base station BS, and the decapsulation module is further configured to: if the MAC PDU includes an extended subheader, unpack or unpack the MAC PDU, The MAC header and the extended sub-hair in the MAC PDU are sent to the encapsulating module; the encapsulating module is further configured to package and encapsulate the MAC header and the extended sub-head into a management Relay MAC PDU, where the Relay MAC PDU is managed. The management tunnel connection identifier MT-CID is included, and the management relay MAC PDU is sent to the sending module;

 The sending module is further configured to send the management Relay MAC PDU to the second network node. The network node is a relay station, the second node is a base station BS, and the network node further includes a capability negotiation module, where the capability negotiation module is configured to generate a first request message, where the first request message carries the a flag of the capability of the relay station to construct and transmit the Relay MAC PDU, the first request message is sent to the sending module, and the sending module is further configured to send the first request message to the second The receiving module is further configured to receive a first response message from the second network node, and send the first response message to the capability negotiation module;

 The capability negotiation module is further configured to analyze the first response message, and determine that the second network node has the capability of constructing and transmitting the Relay MAC PDU.

The network node is a relay station, the second network node is a base station BS, the network node further includes a tunnel QoS determining module, and the receiving module is further configured to receive a second request message from the second network node, The second request message carries a tunnel QoS parameter, and the second request message is transmitted to the tunnel QoS determining module; The tunnel QoS determining module is configured to determine a QoS parameter of the tunnel according to the QoS parameter and the capability of the second request message, and generate a second response message, where the second response message carries the determined tunnel QoS parameters;

 The sending module is further configured to send the second response message to the second network node, so that the second network node modifies a QoS parameter on the tunnel to meet a QoS of the connection on the tunnel. demand.

 The network node is a relay station, the second network node is a base station BS, and the network node further includes a classification mapping module, and the tunnel QoS determining module is further configured to: if the second request message further carries a classification mapping The information is sent to the classification mapping module, and the receiving module is further configured to receive a Relay MAC PDU from the second network node, and send the Relay MAC PDU to the decapsulation The de-encapsulation module is further configured to: de-packet or de-sliced the Relay MAC PDU into an SDU, and send the SDU to the classification mapping module; The classification mapping information is used to map the SDU classification to a corresponding connection, and the SDU is sent to the encapsulation module. The encapsulation module is further configured to package or encapsulate the SDU into Sending, by the MAC PDU, the MAC PDU to the sending module;

 The sending module is further configured to send the MAC PDU from the connection to the terminal. The decapsulation module is further configured to perform integrity judgment on an SDU in which the MAC PDU or the Relay MAC PDU is depacketized or unfragmented, and the SDU that is assembled after being unpacked or unfragmented is incomplete. , the incomplete SDU is discarded.

The network node is a base station BS, and the second network node is a relay station, and the network node further includes: a second receiving module, a second decapsulation module, and a second classification mapping module, where the second receiving module is further used Receiving the Relay MAC PDU from the second network node, and sending the Relay MAC PDU to the second decapsulation module; the second decapsulation module is further configured to unpack the Relay MAC PDU or The fragmentation is assembled into an SDU, and the SDU is sent to the second classification mapping module; The second classification mapping module is configured to map the SDU to the corresponding Data_path according to the mapping relationship between the value of the T-CID and the corresponding Data_path, and send the SDU after the classification mapping to the SDU. Transmitting module;

 The sending module is further configured to send the SDU after the classification mapping to the upper layer network by using the Data_path. The network node is a base station BS, the second network node is a relay station, the network node further includes a second capability negotiation module, and the second receiving module is further configured to receive the first from the second network node. a request message, the first request message is sent to the second capability negotiation module, and the second capability negotiation module is configured to analyze and process the first request message, and generate a bearer to indicate that the network node is constructed and transmitted. a first response message of the flag of the capability of the Relay MAC PDU, sending the first response message to the sending module;

 The sending module is further configured to send the first response message to the second network node. The network node is a base station BS, the second network node is a relay station, the network node further includes a second tunnel QoS determining module, and the second tunnel QoS determining module is configured to generate a second request message, where the The second request message is configured to carry the tunnel QoS parameter and the classification mapping information, where the sending module is further configured to send the second request message to the second network node, where the second receiving module is further configured to receive the source information Decoding a second response message of the second network node and sending the second response message to the second tunnel QoS determining module;

 The second tunnel QoS determining module is further configured to determine a tunnel QoS parameter according to the second response message.

 Those skilled in the art will appreciate that the system can be a system of multiple devices or a single device.

 The term "subordinate station" in the above embodiment can be understood as the next hop of data transmission, and is not limited to uplink data transmission or downlink data transmission.

The term "receiving" in the above embodiments may be understood as actively acquiring information from other modules or receiving information transmitted by other modules. The above modules can be distributed in one device or distributed For multiple devices. The above modules can be combined into one module, or can be further split into multiple sub-modules.

 The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

 The solution described in the claims is also the scope of protection of the embodiments of the present invention.

 One of ordinary skill in the art will appreciate that all or part of the processing of the above-described embodiments can be accomplished by a program that instructs related hardware, which can be stored in a computer readable storage medium.

 The above description is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim A data transmission method, comprising: a tunnel entry station Ingress Station packs or fragments a service data unit SDU transmitted by using the same tunnel tunnel, and encapsulates it into a relay medium access control protocol data unit Relay MAC PDU, The Relay MAC PDU includes a tunnel connection identifier T-CID; and the Relay MAC PDU is sent to the tunnel exit station Egress Station. The method of claim 1, wherein the sending the Relay MAC PDU to the tunnel egress station includes: the Ingress Station sending the Relay MAC PDU to an intermediate station of the tunnel intermediate station; The Intermediate Station unpacks or de-shards the Relay MAC PDU into SDUs, and then packs or fragments according to network conditions, and encapsulates them into new Relay MAC PDUs; and sends the new Relay MAC PDUs to the Egress. Station. The method according to claim 1 or 2, wherein the Relay MAC PDU further includes a packing sub-header PSH, and the PSH is used to identify different SDUs or different SDUs encapsulated in the Relay MAC PDU. And the Relay MAC PDU further includes a slice sub-header FSH, where the FSH is used to identify a slice of the SDU encapsulated in the Relay MAC PDU. The method according to any one of claims 1 to 3, characterized in that, before the tunnel entry station Ingress Station packages or slices the service data unit SDU transmitted using the same tunnel tunnel, the method further comprises: The site performs the network access operation, and the tunnel site includes an ingress station and an egress station, and the tunneling station performs the network access operation, where the tunneling station sends the first request message to the base station BS to perform capability negotiation during the network access operation. The first request message carries a flag indicating that the tunnel station is capable of constructing and transmitting the Relay MAC PDU; The tunnel site receives a first response message from the BS, and the first response message carries a flag bit indicating a capability of the BS to construct and transmit the Relay MAC PDU. The method according to any one of claims 1-4, wherein before the tunnel entry station Ingress Station packages or fragments the service data unit SDU transmitted by using the same tunnel, the method further includes: The Ingress Station or the Egress Station receives the second request message from the base station BS, where the second request message carries the first tunnel quality of service QoS parameter; and the QoS parameter carried in the second request message and the Ingress Station or The capability of the Egress station determines the QoS parameter of the tunnel, and generates a second response message, where the second response message carries the determined tunnel QoS parameter; and sends the second response message to the base station BS, so that The base station modifies the QoS parameters on the tunnel to meet the QoS requirements of the connection on the tunnel. The method of claim 5, wherein in the downlink data transmission, the second request message further carries the classification mapping information; then the method further comprises: the Egress station receiving the After the Relay MAC PDU of the Ingress Station, the Relay MAC PDU is depacketized or de-sliced to form an SDU; the SDU classification is mapped to the corresponding connection according to the classification mapping information; and the SDU is packaged or sliced. Encapsulating into a MAC PDU, transmitting the MAC PDU from the connection to the terminal. The method according to claim 1 or 2, wherein, in the uplink data transmission, the tunnel entry station Ingress Station packages or fragments the service data unit SDU transmitted by using the same tunnel tunnel, the method The method further includes: the tunnel entry station Ingress Station receives a medium access control protocol data unit MAC PDU from the terminal; unpacks or de-shards the MAC PDU, and assembles the SDU into an SDU; The tunnel entry station Ingress Station packages or fragments the SDUs in the SDU that are decapsulated or unpacked and encapsulated into the same tunnel using the same tunnel. The method of claim 7, wherein, if the MAC PDU further includes an extended sub-header, after the ingress station unpacks or de-shards the MAC PDU, the method further includes: The MAC header and the extended sub-header in the MAC PDU are packaged and encapsulated into a management Relay MAC PDU, where the management Relay MAC PDU includes a management tunnel connection identifier MT-CID, and the management Relay MAC PDU is sent to the tunnel exit station. Egress Station. The method according to claim 8, wherein the management Relay MAC PDU further comprises a packing sub-header PSH, the PSH is used to identify an extension from different MAC PDUs encapsulated in the management Relay MAC PDU. Child head. The method according to claim 1, wherein in the uplink data transmission, the Ingress Station is an access RS, and the Egress Station is a BS; the method further includes: the BS will receive the received The relay MAC PDU of the access RS is unpacked or unsegmented into an SDU; the BS performs CS packet classification mapping on the SDU, and maps the SDU classification to a corresponding one according to the value of the T-CID. Data channel on Data_path. The method of claim 10, wherein the mapping between the value of the T-CID and the corresponding data channel Data_path is stored in the BS when the tunnel is established. The method according to claim 2 or 6 or 7 or 10, wherein, when the MAC PDU or the Relay MAC PDU is depacketized or de-sliced into an SDU, if the assembled SDU is determined If it is incomplete, the incomplete SDU is discarded. 13. A relay station, wherein the relay station comprises a package module and a sending module, The encapsulating module is configured to package or fragment a service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID And sending the Relay MAC PDU to the sending module, where the sending module is configured to send the Relay MAC PDU to the base station BS. The relay station according to claim 13, wherein the relay station further includes a receiving module and a decapsulation module, and the receiving module is configured to receive a MAC PDU from the terminal, and send the MAC PDU to the solution. The encapsulation module is configured to depacket or de-shard the MAC PDU into an SDU, and send the SDU to the encapsulation module. The relay station according to claim 14, wherein the decapsulating module is further configured to: if the MAC PDU includes an extended subheader, depacket or defragment the MAC PDU, The MAC header and the extended sub-hair in the MAC PDU are sent to the encapsulating module. The encapsulating module is further configured to package the MAC header and the extended sub-header into a management Relay MAC PDU, where the management Relay MAC PDU is included. Managing a tunnel connection identifier MT-CID, and sending the management Relay MAC PDU to the sending module; The relay station according to claim 14, wherein the relay station further includes a capability negotiation module, the capability negotiation module is configured to generate a first request message, where the first request message carries a representation of the relay station And sending, by the flag bit of the capability of transmitting the Relay MAC PDU, the first request message to the sending module; the sending module is further configured to send the first request message to the base station BS; The module is further configured to receive a first response message from the BS, and cancel the first response And the capability negotiation module is further configured to analyze the first response message, and determine that the BS has the capability of constructing and transmitting the Relay MAC PDU. The relay station according to claim 14, wherein the relay station further includes a tunnel QoS determining module, and the receiving module is further configured to receive a second request message from the BS, where the second request message is Carrying the tunnel QoS parameter, and transmitting the second request message to the tunnel QoS determining module; the tunnel QoS determining module, configured to determine a QoS parameter of the tunnel according to the QoS parameter and the self-capability carried in the second request message And generating a second response message, where the second response message carries the determined tunnel QoS parameter; the sending module is further configured to send the second response message to the BS, so that the base station Modify the QoS parameters on the tunnel to meet the QoS requirements of the connection on the tunnel. The relay station according to claim 17, wherein the relay station further includes a classification mapping module, and the tunnel QoS determining module is further configured to: if the second request message further carries classification mapping information, Transmitting the classification mapping information to the classification mapping module; the receiving module is further configured to receive a Relay MAC PDU from the BS, and send the Relay MAC PDU to the decapsulation module; The module is further configured to: de-packet or de-sliced the Relay MAC PDU into an SDU, and send the SDU to the classification mapping module; the classification mapping module is configured to: according to the classification mapping information The SDU classification is mapped to the corresponding connection, and the SDU is sent to the encapsulating module; the encapsulating module is further configured to package or fragment the SDU into a MAC PDU, and Sending the MAC PDU to the sending module; the sending module is further configured to send the MAC PDU from the connection to the terminal. The relay station according to any one of claims 14 to 18, wherein the decapsulation module is further configured to complete the SDU that is unpacked or unpacked by the MAC PDU or the Relay MAC PDU. Sexually judging, if the SDU assembled after unpacking or unfragmenting is incomplete, the incomplete SDU is discarded. A base station, the base station includes a package module and a sending module, and the encapsulating module is configured to package or slice a service data unit SDU that is transmitted by using the same tunnel tunnel, and encapsulate the packet into a relay medium. The control protocol data unit Relay MAC PDU, the Relay MAC PDU includes a tunnel connection identifier T-CID, and the relay MAC PDU is sent to the sending module, and the sending module is configured to send the Relay MAC PDU to the relay station. The base station according to claim 20, wherein the base station further includes a receiving module, a decapsulation module, and a classification mapping module, where the receiving module is configured to receive a Relay MAC PDU from the relay station, The Relay MAC PDU is sent to the de-encapsulation module; the de-encapsulation module is further configured to de-packet or de-slice the Relay MAC PDU into an SDU, and send the SDU to the classification mapping module; The classification mapping module is configured to map the SDU to the corresponding Data_path according to the mapping relationship between the value of the T-CID and the corresponding Data_path, and send the classified SDU to the sending module. The sending module is further configured to send the SDU after the classification mapping to the upper layer network by using the Data_path. The base station according to claim 20 or 21, wherein the base station further includes a capability negotiation module, the receiving module is further configured to receive a first request message from the relay station, and the first request is The message is sent to the capability negotiation module, where the capability negotiation module is configured to analyze and process the first request message, and generate a first response message that carries a flag indicating that the base station constructs and transmits the Relay MAC PDU. Will be described The first response message is sent to the sending module, and the sending module is further configured to send the first response message to the relay station. The base station according to any one of claims 20 to 22, wherein the base station further includes a tunnel QoS determining module, where the tunnel QoS determining module is configured to generate a second request message, the second request message And carrying the tunnel QoS parameter and the classification mapping information; the sending module is further configured to send the second request message to the relay station; the receiving module is further configured to receive a second response message from the relay station, and And sending the tunnel QoS determining module to the tunnel QoS determining module, where the tunnel QoS determining module is further configured to determine a tunnel QoS parameter according to the second response message. A data transmission system, comprising a base station BS and a relay station RS, wherein the RS is used to depacket or de-shard the received MAC PDU into an SDU, and the service data unit to be transmitted using the same tunnel tunnel The SDU is packaged or fragmented and encapsulated into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID, and the Relay MAC PDU is sent to the BS; The received Relay MAC PDU is unpacked or unpacked and assembled into an SDU, and the SDU is subjected to CS Packet classification mapping to the corresponding Data_path according to the value of the T-CID. The system according to claim 24, wherein the RS is further configured to: if the MAC PDU includes an extended sub-head, depacket or de-shard the MAC PDU, and the MAC PDU is The MAC header and the extended subheader are packaged and packaged to manage a Relay MAC PDU, where the management Relay MAC PDU includes a management tunnel connection identifier MT-CID, and the management Relay MAC PDU is sent to the BS. The system according to claim 24, wherein the RS is further configured to generate a first request message, where the message carrying indicates that the relay station is constructed and transmitted. Transmitting, by the flag of the capability of the Relay MAC PDU, the first message to the BS; the BS is further configured to analyze and process the first request message, and generate a bearer to indicate that the BS constructs and transmits the The first response message of the flag of the capability of the Relay MAC PDU, the first response message is sent to the RS. The system according to claim 24, wherein the BS is further configured to generate a second request message, where the second request message carries a tunnel QoS parameter and classification mapping information, and the second request message is used. Sending to the RS; the RS is further configured to determine a QoS parameter of the tunnel according to the QoS parameter and the self-capability carried in the second request message, and generate a second response message, where the second response message carries the determined The tunnel QoS parameter sends the second response message to the BS, so that the base station modifies the QoS parameter on the tunnel to meet the QoS requirement of the connection on the tunnel. The system according to claim 27, wherein the BS is further configured to package or fragment the SDUs received from the upper layer network using the same tunnel to be encapsulated into a relay medium access control protocol data unit. a Relay MAC PDU, the Relay MAC PDU includes a tunnel connection identifier T-CID, and the Relay MAC PDU is sent to the RS;  The RS is further configured to unpack or unsegment the received Relay MAC PDU into a new SDU, and map the new SDU classification to a corresponding connection according to the classification information, and the The SDU is packaged or fragmented into a MAC PDU, and the MAC PDU is sent to the terminal.  A network node, wherein the network node comprises: a packaging module and a sending module,  The encapsulating module is configured to package or fragment a service data unit SDU transmitted by using the same tunnel tunnel into a relay medium access control protocol data unit Relay MAC PDU, where the Relay MAC PDU includes a tunnel connection identifier T-CID ;  The sending module is configured to send the Relay MAC PDU to a second network node.  The network node according to claim 29, wherein the network node is a relay station, and the network node further includes a receiving module and a decapsulation module,  The receiving module is configured to receive a MAC PDU from the terminal, and send the MAC PDU to the decapsulation module; Decapsulating module, configured to depacket or unshard the MAC PDU into an SDU, The SDU is sent to the encapsulation module.  The network node according to claim 29 or 30, wherein the network node is a relay station, the second network node is a base station BS, and the decapsulation module is further configured to: if the MAC PDU is included Expanding the sub-header, depacking or de-sharding the MAC PDU, and sending the MAC header and the extended sub-hair in the MAC PDU to the encapsulating module; the encapsulating module is further configured to use the MAC header And the extended subheader is packaged and configured to manage a Relay MAC PDU, where the management Relay MAC PDU includes a management tunnel connection identifier MT-CID, and the management Relay MAC PDU is sent to the sending module;  The sending module is further configured to send the management Relay MAC PDU to the second network node. The network node according to any one of claims 29 to 31, wherein the network node is a relay station, the second node is a base station BS, and the network node further includes a capability negotiation module, and the capability negotiation a module, configured to generate a first request message, where the first request message carries a flag indicating that the relay station constructs and transmits the Relay MAC PDU, and sends the first request message to the sending module; The sending module is further configured to send the first request message to the second network node; the receiving module is further configured to receive a first response message from the second network node, where the first response is Transmitting a message to the capability negotiation module;  The capability negotiation module is further configured to analyze the first response message, and determine that the second network node has the capability of constructing and transmitting the Relay MAC PDU. The network node according to any one of claims 29 to 32, wherein the network node is a relay station, the second network node is a base station BS, and the network node further includes a tunnel QoS determining module, The receiving module is further configured to receive a second request message from the second network node, where the second request message carries a tunnel QoS parameter, and the second request message is sent to the tunnel QoS determining module; a QoS determining module, configured to determine a QoS parameter of the tunnel according to the QoS parameter and the self-capability carried in the second request message, and generate a second response message, where the second response message carries Taking the determined tunnel QoS parameters;  The sending module is further configured to send the second response message to the second network node, so that the second network node modifies QoS parameters on the tunnel to meet the QoS of the connection on the tunnel. demand.  The network node according to claim 33, wherein the network node is a relay station, the second network node is a base station BS, the network node further includes a classification mapping module, and the tunnel QoS determining module, And if the second request message further carries the classification mapping information, the classification mapping information is sent to the classification mapping module; the receiving module is further configured to receive the second network node from the second network node. a relay MAC PDU, the relay MAC PDU is sent to the decapsulation module, and the decapsulation module is further configured to unpack or unpack the Relay MAC PDU into an SDU, and send the SDU to the The classification mapping module is configured to: map the SDU classification to the corresponding connection according to the classification mapping information, and send the classified SDU to the encapsulation module; The encapsulating module is further configured to package the SDU into a MAC PDU, and send the MAC PDU to the sending module.  The sending module is further configured to send the MAC PDU from the connection to the terminal.  35. The network node of claim 30 or 34, wherein  The decapsulation module is further configured to perform integrity judgment on an SDU in which the MAC PDU or the Relay MAC PDU is depacketized or unfragmented, and the SDU assembled after being unpacked or unfragmented is incomplete. , the incomplete SDU is discarded. The network node according to claim 29, wherein the network node is a base station BS, the second network node is a relay station, and the network node further comprises: a second receiving module, a second decapsulation module And a second classification mapping module, the second receiving module, configured to receive a Relay MAC PDU from the second network node, and send the Relay MAC PDU to the second decapsulation module; The encapsulating module is further configured to depacket or de-slice the Relay MAC PDU into an SDU, and send the SDU to the second classification mapping module; The second classification mapping module is configured to map the SDU to the corresponding Data_path according to the mapping relationship between the value of the T-CID and the corresponding Data_path, and send the SDU after the classification mapping to the SDU. Transmitting module;  The sending module is further configured to send the SDU after the classification mapping to the upper layer network by using the Data_path. The network node according to claim 29 or claim 36, wherein the network node is a base station BS, the second network node is a relay station, and the network node further includes a second capability negotiation module, where the The second receiving module is further configured to receive the first request message from the second network node, and send the first request message to the second capability negotiation module, where the second capability negotiation module is configured to analyze Processing the first request message, generating a first response message carrying a flag indicating that the network node constructs and transmits the Relay MAC PDU, and sending the first response message to the sending module;  The sending module is further configured to send the first response message to the second network node. The network node according to claim 29 or 36 or 37, wherein the network node is a base station BS, the second network node is a relay station, and the network node further includes a second tunnel QoS determining module. a second tunnel QoS determining module, configured to generate a second request message, where the second request message carries a tunnel QoS parameter and classification mapping information; the sending module is further configured to send the second request message to the a second network node; the second receiving module is further configured to receive a second response message from the second network node and send the second response message to the second tunnel QoS determining module;  The second tunnel QoS determining module is further configured to determine a tunnel QoS parameter according to the second response message.