WO2008009228A1

WO2008009228A1 - A relay transmitting method, apparatus and system for connection of wide-band wireless signal

Info

Publication number: WO2008009228A1
Application number: PCT/CN2007/070258
Authority: WO
Inventors: Shulan Feng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-07-10
Filing date: 2007-07-09
Publication date: 2008-01-24
Also published as: CN100589633C; CN101106794A

Abstract

A relay transmitting method, apparatus and system for connection of wide-band wireless signal. The said method comprises the following steps: a base station distributes physical resources to the service linking of terminals controlled by the relay stations which are controlled by the base station (S502); The base station notifies the relay stations the location information of the physical resources which are assigned to the service linking of terminals controlled by the relay stations which are controlled by the base station through channel messages ( S504 ); the said relay stations analyze the channel messages and obtain the location information of the physical resources which are assigned to the service linking of controlled terminals (S506 ), and receive the downlink service of the controlled terminals send by the base station at corresponding locations; the said relay stations transmit the received downlink service to the controlled terminals, and transmit the uplink service from the controlled terminals to the base station.

Description

Relay forwarding method, device and system for broadband wireless access

[1] Technical field

[2] The present invention relates to the field of broadband wireless access, and in particular, to a relay forwarding method, apparatus and system for broadband wireless access.

[3] Background of the invention

[4] The prior art proposes a broadband wireless access method. Figure 1 shows a schematic diagram of a network topology structure to which the method is applied. In this method, wireless access is achieved through a Subscriber Station (SS) and a Base Station (BS). The terminal (SS) is responsible for initiating and generating a service request of the user, and receiving the service from the base station (BS), the base station receiving the service request from the terminal, and accessing the service request to the corresponding backbone network, and the peer will come from The service request of the backbone network is sent to the terminal. The base station can manage and control one or more terminals.

[5] Due to the complicated design and high cost of the base station, there is also a relay station with simple design and low price in the above broadband wireless access system (Relay)

Station, RS) to expand the coverage of the base station and increase the capacity of the base station. This kind of relay station (RS

A schematic diagram of the network topology can be seen in Figure 2.

[6] However, how to implement a relay station in a broadband wireless access system is still under discussion. In the design of the relay station, the first problem to be solved is the allocation of physical resources. At present, some physical resource allocation schemes have been proposed, which are allocated to each relay station in a certain area of the base station uplink or the base station downlink, and the divided area is responsible for forwarding the uplink and downlink services of the terminal controlled by the relay station. The areas allocated by different relay stations are at least different in time, frequency or space. This method of dividing a fixed different area for each relay station can effectively reduce interference, but may repeatedly allocate resources for the terminal, for example, a terminal in a macro diversity set or a terminal in which a multi-cell accesses a multicast broadcast service, therefore, the above The resource utilization of the method is low.

[7] FIG. 3 and FIG. 4 are diagrams showing the structure of two types of relay frames to which the above existing methods are applied. In the two frame structures, the base station allocates a certain area for each relay station, and each of the relay stations occupies different physical resources (for example, the frequency occupied by each relay station or the occupied gap is different), and each relay station forwards Industry The physical resources occupied by the service are also different.

[8] In the process of implementing the present invention, the inventors have found that in the existing method of using the above two frame structures, the terminal forwarded by the relay station cannot implement the macro diversity combining function. Moreover, since it is necessary to allocate services for terminals controlled by each relay station, for terminals controlled by multiple relay stations, resources need to be allocated to the terminals in each relay station, which greatly reduces the utilization of physical resources. In particular, for broadcast/multicast services, the base station needs to allocate broadcast/multicast service resources for each relay station, and each relay station uses different broadcast/multicast service resources to forward services to the terminal. On the one hand, the terminal cannot implement multiple Accessing macro-diversity of broadcast/multicast services of the base station and utilizing some unique advantages of the broadcast/multicast service of the multi-access base station. On the other hand, each relay station needs to receive with different broadcast/multicast service resources. Compared with forwarding the same service, the utilization of physical resources is greatly reduced.

[9] Summary of the invention

[10] The technical problem to be solved by the present invention is to provide a relay forwarding method, apparatus and system for broadband wireless access to improve resource utilization in a broadband access method.

[11] The object of the present invention is achieved by the following technical solutions:

[12] A relay forwarding method for broadband wireless access, comprising:

[13] The base station allocates physical resources for each service link of the terminal controlled by each relay station controlled by the base station;

[14] The base station notifies the relay stations of the location information of the physical resources occupied by the service links of the terminals controlled by the allocated relay stations by signaling;

[15] Each of the relay stations extracts, from the received signaling, location information of physical resources occupied by all service links of the terminal controlled by the terminal, and receives the terminal controlled by the base station and sent by the base station at the corresponding location. Downstream business;

[16] The relay station forwards the received downlink service to the terminal it controls, and forwards the uplink service of the terminal controlled by the terminal to the base station.

[17] A base station comprising:

[18] A module for allocating physical resources for each service link of a terminal controlled by each relay station controlled by a base station

[19] A module for notifying the location of the physical resources occupied by each service link of the terminal controlled by the allocated relay stations by signaling. [20] A relay station, comprising:

[21] a module for extracting, from signaling sent by a base station, location information of physical resources occupied by all service links of terminals controlled by the base station;

[22] receiving the downlink service delivered by the base station and the uplink service sent by the terminal, and forwarding the downlink service to the terminal controlled by the terminal, at a corresponding location of the physical resource occupied by the service link of the terminal that is controlled by the terminal, Forwarding the uplink service to a module of a base station.

[23] A relay forwarding system for broadband wireless access, comprising:

[24] a base station, configured to allocate physical resources to each service link of a terminal controlled by each relay station controlled by the base station; and locating the physical occupied by each service link of the terminal controlled by the allocated relay station by signaling Notifying the relay stations of the location information of the resources;

[25] a relay station, configured to extract, from the signaling sent by the base station, location information of a physical resource occupied by all service links of the terminal controlled by the base station, and receive the control that is sent by the base station at the corresponding location The downlink service of the terminal forwards the received downlink service to the terminal controlled by the terminal; and forwards the uplink service of the terminal controlled by the terminal to the base station.

[26] The implementation of the present invention has the following beneficial effects:

[27] The base station only allocates physical resources once for each service link of each terminal, that is, the physical resources occupied by the services of the same terminal controlled by different relay stations are the same, the resource utilization is significantly improved, and Simple, low signaling overhead.

[28] BRIEF DESCRIPTION OF THE DRAWINGS

[29] FIG. 1 is a schematic diagram of a prior art network topology;

[30] FIG. 2 is a schematic diagram of a network topology structure of a conventional relay station;

[31] FIG. 3 and FIG. 4 are schematic diagrams of two existing relay frame structures;

[32] FIG. 5 is a main flowchart of a relay forwarding method for broadband wireless access according to the present invention;

6 is a flowchart of downlink resource allocation by a base station in FIG. 5 according to the present invention;

7 is a flowchart of uplink resource allocation by a base station in FIG. 5 according to the present invention;

[35] FIG. 8 is a schematic diagram of a network topology structure used in an embodiment of the present invention;

[36] FIG. 9 is a schematic structural diagram of a forwarding frame according to the present invention;

10 is a schematic structural diagram of another forwarding frame according to the present invention; 11 is a schematic structural diagram of another forwarding frame according to the present invention.

[39] Mode for carrying out the invention

[40] The present invention provides a relay forwarding method, apparatus and system for broadband wireless access. With this method, a base station only needs to allocate physical resources once for each terminal, that is, the same control of different relay stations. The physical resources occupied by the services of the terminal are the same, which can effectively improve resource utilization. In the same embodiment, as an effective embodiment, if the base station adjusts the engraving of each terminal to forward the terminal service, and synchronizes the received signals arriving at the terminal through different relay stations, the terminal macro diversity receiving downlink signal or the base station macro diversity receiving terminal may be implemented. The uplink signal further improves the quality of the received signal.

[41] As shown in FIG. 5, it is a processing flow diagram of a relay forwarding method for broadband wireless access proposed by the present invention, which includes the following steps:

[42] First, in step S502, the base station allocates physical resources for each service link of the terminal controlled by each relay station, and the relay stations are controlled by the base station, wherein the base station performs physical resources on the service links. The allocation includes the allocation of downlink resources and uplink resources. The specific processing flow for the base station to allocate downlink resources and uplink resources is as shown in FIG. 6 and FIG. 7 below.

[43] Step S504: The base station sends signaling (such as physical resource allocation signaling) to each relay station, and uses the signaling to notify the location information of the physical resources occupied by the service links of the terminals controlled by the relay stations.

[44] Step S506, after receiving the foregoing signaling, the relay station extracts location information of physical resources occupied by all service links (including broadcast and multicast services of multi-cell access) of the terminal controlled by itself, and correspondingly The location receives the downlink service of the terminal controlled by the base station delivered by the base station. After the reception is completed, it is ready to forward the received downlink service to the terminal.

[45] Step S508, the base station adjusts the engraving of each relay station to start forwarding the terminal service, so that the received signals transmitted to the terminal through different relay stations are synchronized, and the terminal can perform macro diversity on the data forwarded from the plurality of relay stations received by the same terminal. merge.

[46] In the same step, in step S510, the base station adjusts the relay station to receive the uplink signal from the terminal to synchronize the uplink reception. In step S510, the base station adjusts the time of the uplink signal from the terminal forwarded by the relay station, so as to be forwarded through different relay stations. The uplink signal arrives at the base station for synchronization, and the base station can perform macro diversity combining data received from multiple relay stations received by the peer.

[47] wherein the above steps S508 and S510 are optional steps. And steps S508 and S510 can be independent of.

[48] As shown in FIG. 6, the flowchart of the process for performing downlink resource allocation by the base station according to the present invention includes the following steps:

[49] Step S602: The base station allocates continuous physical resources for broadcast and multicast services accessed by multiple BSs.

[50] Step S604, the base station is a downlink service link of all terminals of the first relay station controlled by the relay station.

(In addition to broadcast and multicast services for multiple BS access) Allocate resources. In order to further simplify the receiver design, in a preferred embodiment of the present invention, after resource allocation, physical resources of different service links of the same terminal are consecutive, and physical resources of different terminals of the same relay station in the macro diversity set are continuous.

[51] Step S606: The base station allocates resources for all the downlink service links (except the broadcast and multicast services of the multiple BS access) of all the terminals of the relay station controlled by the base station, which are not previously allocated resources. Each allocation no longer allocates resources for broadcast and multicast services for multiple BS access, and no longer allocates resources for terminals that have already allocated resources. Until all relay station resources are allocated.

[52] Step S608: The base station allocates downlink resources to terminals directly controlled by the base station.

[53] In some other embodiments, the above step S608 can be placed before steps 602-606.

[54] As shown in FIG. 7, a flowchart of a process for performing uplink resource allocation by a base station according to the present invention includes the following steps:

[55] Step S702: The base station allocates an uplink resource to a terminal directly controlled by the base station.

[56] Step S704: The base station allocates resources for uplinks of all terminals of the first relay station controlled by the relay station. In order to further simplify the receiver design, in a preferred embodiment of the present invention, after resource allocation, the physical resources of different services of the same terminal are consecutive, and the physical resources of different terminals of the same relay station in the macro diversity set are continuous.

[57] Step 706: The base station allocates resources for all the uplinks of all the relay stations controlled by the base station in the terminal that have not been allocated resources before, and each allocation does not allocate resources for the terminals that have already allocated resources. Until all relay station resources are allocated.

In some other embodiments, the above step S702 may also be placed after steps 704-706.

[59] A method for realizing synchronization of each relay station in the above steps S508 to 512 is given below. Defining the start of each downlink station to forward the downlink service is the frame header of each relay station, so that the offset of the physical resources occupied by each service forwarded by each relay station with respect to the downlink frame header position of each relay station is opposite to the service delivered by the base station. The positional offset of the base station frame header is the same, or the difference between the two is constant. Then, the base station can adjust the engraving of each relay station to start the downlink forwarding, and synchronize the engraving, so that the data forwarded by different relay stations can reach the same time in the terminal, and the terminal can receive the data forwarded by the multiple relay stations to realize macro diversity. merge. Correspondingly, the offset of the physical resource occupied by each service forwarded by the relay station relative to the downlink frame header position of the relay station is the same as the position offset of the base station receiving the service engraving relative to the base station frame header, and the base station adjusts each relay station by signaling. The engraving of the uplink forwarding makes the engraving synchronization, so that the data forwarded by different relay stations arrives at the same time in the base station, so that the base station can macro-separate the data forwarded from the plurality of relay stations received by the peer. If the uplink of the relay station starts to be forwarded and the location of the downlink frame header of the relay station is fixed, the base station only needs to adjust the frame header synchronization of each relay station to implement the relay station forwarding service synchronization, thereby further saving signaling overhead.

The method of the present invention will now be described by way of specific examples in order to provide a further detailed description of the invention. As shown in Fig. 8, a network topology in which the present invention is applied is shown. In this topology, there are two relay stations RS1 and RS2 controlled by the base station BS1, the relay station RSI controls the terminals SSI, SS 2 and SS3, and the relay station RS2 controls the terminals SS2, SS3, SS4, SS5 and SS6.

[61] First consider the macro diversity set in the same base station. It is assumed that the corresponding forwarding frame structure used by the relay station is as shown in FIG. The uplink and downlink in the forwarding frame structure shown in FIG. 9 are both in a split-duplex (TDD) mode, and the forwarding frame structure used by the relay station of the present invention is not limited to the split-duplex mode, and may also use, for example, a frequency. Modes such as duplex (FDD) and half-frequency division duplex (H-FDD).

[62] BS1

First, physical resources are allocated to terminals SS1~SS3 controlled by RS1. Since SS2 and SS3 are controlled by RS2, the resource allocation of SS2 and SS3 is continuous; then resources are allocated for terminals SS2~SS4 and SS6 controlled by RS2, because SS2 and SS3 have already been allocated, so BS1 only needs to allocate resources for SS4 and SS6. The RS1 receives the signaling from the BS1, searches for the downlink service address of the terminals SS1, SS2, and SS3 controlled by itself from the received signaling, and receives the downlink service at the corresponding location. The peer RS2 receives the signaling from BS1, searches for the downlink service address of the terminals SS2, SS3, SS4, and SS6 controlled by itself, and receives the downlink service at the corresponding location. After receiving the corresponding downlink signals, the relay stations RS1 and RS2 are ready to forward the corresponding downlink services to the terminals controlled by them. The base station controls the RS1 and the RS2 to start the forwarding by signaling, so that the SS2 and SS3 downlink services sent by the RS1 are synchronized with the SS2 and SS3 downlink services sent by the RS2. In this way, RS1 and R The downlink traffic forwarded by S2 arrives at the same time as SS2 and SS3. SS2 can macro-separate the signals from RS1 and RS2, and SS3 can macro-separate the signals from RS1 and RS2.

[63] In the uplink, after the uplink services of the terminals SS2 and SS3 arrive at the relay stations RS1 and RS2 and are received by the RS1 and the RS2, the base station BS1 adjusts the time when each relay station starts to forward the uplink service, so that RS1 and RS2 start the uplink synchronization. Therefore, the SS2 and SS3 uplink services forwarded by RS1 and RS2 arrive at the base station, and the base station can implement the uplink macro diversity set.

[64] Secondly, consider the macro-division set between different base stations. Considering the terminal SS6 in the above topology, it is possible to receive the signal forwarded by the BS1 and controlled by the RS2, or the signal transmitted by the base station BS2 and controlled by the relay station RS3. The SS6 macro diversity set can be implemented by adjusting the uplink and downlink resource allocations of the base stations BS1, BS2 and the start forwarding engraving of the relay stations RS2 and RS3. Its forwarding frame structure is shown in Figure 10.

[65] Next, consider a service, that is, a multi-cell access multicast broadcast service, in which multiple base stations can simultaneously transmit broadcast and multicast services to multiple terminals, which can be implemented by the method of the present invention. Multi-cell access to the multicast broadcast service at the relay station. As shown in Figure 11 below, the multicast and broadcast services received by all the terminals received by the two hops are synchronized, and the macro diversity set can be conveniently implemented and roamed in the multicast broadcast service area accessed by the same multi-cell.

[66] In summary, in the method provided by the present invention, the base station allocates only one physical resource for each service link of each terminal, that is, the physics occupied by the services of the same terminal controlled by different relay stations. The resources are the same, and the resource utilization rate is significantly improved. In addition, the present invention has the advantages of simple implementation and low signaling overhead.

[67] The base station synchronizes the relaying of the terminal services by each relay station, synchronizes the downlink signals arriving at the terminals through different relay stations, and synchronizes the uplink signals of different relay stations to the base station, so as to implement terminal macro diversity reception downlink signals or base station macro diversity reception from the terminal. The uplink signal can improve the quality of the received signal.

[68] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of within the technical scope disclosed by the present invention. Changes or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

[1] 1. A relay forwarding method for broadband wireless access, comprising:

The base station allocates physical resources to each service link of the terminal controlled by each relay station controlled by the base station; the base station notifies the location information of the physical resources occupied by the service links of the terminal controlled by the allocated relay stations by signaling Each relay station;

Each of the relay stations extracts, from the received signaling, the location information of the physical resources occupied by all the service links of the terminal controlled by the terminal, and receives the downlink service of the terminal controlled by the base station delivered by the base station;

The relay station forwards the received downlink service to the terminal it controls, and forwards the uplink service of the terminal controlled by the terminal to the base station.

[2] 2. The relay forwarding method for broadband wireless access according to claim 1, wherein the base station allocates physical resources to each service link of the terminal controlled by each relay station controlled by the base station. The process specifically includes:

The base station allocates continuous physical resources for the broadcast and multicast services accessed by the multiple base stations; the base station is the downlink service chain of all the terminals controlled by the relay station except the broadcast and multicast services accessed by the multiple base stations of the first relay station. Allocation of resources;

The base station sequentially allocates resources for the downlink service links of all the terminals of the relay station controlled by the base station except for the broadcast and multicast services accessed by the multiple base stations.

[3] The relay forwarding method for broadband wireless access according to claim 2, wherein the base station allocates physical resources to each service link of the terminal controlled by each relay station controlled by the base station. The process also includes:

The base station allocates downlink resources for terminals directly controlled by the base station.

[4] 4. The relay forwarding method for broadband wireless access according to claim 2 or 3, characterized in that

And the process of allocating resources of the downlink service link of the terminal controlled by the relay station of the first relay station except the broadcast and multicast services of the first base station, and further comprising: the base station is different from the same terminal The service link allocates contiguous physical resources to allocate contiguous physical resources to different terminals in the macro diversity set that have the same relay station.

[5] 5. The relay forwarding method for broadband wireless access according to claim 1, wherein: The process for the base station to allocate physical resources to the service links of the terminals controlled by the relay stations controlled by the base station includes:

The base station allocates resources for the uplink of all terminals of the first relay station controlled by the relay station; the base station sequentially allocates resources for all uplinks of all terminals of the relay station controlled by the base station that have not yet been allocated resources.

[6] 6. The relay forwarding method for broadband wireless access according to claim 5, wherein the base station allocates physical resources to each service link of the terminal controlled by each relay station controlled by the base station. , Also includes:

The base station allocates uplink resources for terminals directly controlled by the base station.

[7] 7. The relay forwarding method for broadband wireless access according to claim 5 or 6, wherein

And the process of allocating resources to the uplink of all terminals of the first relay station controlled by the relay station, and the method further includes:

The base station allocates continuous physical resources for different service links of the same terminal, and allocates continuous physical resources for different terminals in the macro diversity set having the same relay station.

[8] 8. The relay forwarding method for broadband wireless access according to claim 1, wherein the relay station forwards the received downlink service to a terminal controlled by the relay station, and controls the same The process of forwarding the uplink service of the terminal to the base station includes:

The base station adjusts each relay station to start forwarding the downlink terminal service from the base station, so that the received signals that are forwarded by different relay stations and arrive at the same terminal are synchronized;

The base station adjusts the engraving of each relay station to forward the uplink signal from the terminal, so that the uplink signal forwarded by different relay stations arrives at the base station for synchronization.

[9] 9. The relay forwarding method for broadband wireless access according to claim 8, wherein the base station adjusts each relay station to start forwarding the downlink terminal service from the base station, so as to pass through different relay stations. The synchronization of the received signals that are forwarded to the same terminal includes: the terminal receives macro-diversity or selective combining of data forwarded from the plurality of relay stations;

The base station adjusts the engraving of each relay station to forward the uplink signal from the terminal, so that the inter-time synchronization of the uplink signal forwarded by the different relay stations to the base station includes: the base station performs macro diversity or selective combining on the data received from the multiple relay stations.

[10] The relay forwarding method for broadband wireless access according to claim 8 or 9, wherein the base station adjusts each relay station to start forwarding the downlink terminal service from the base station, so as to pass The process of synchronizing the received signals of different relay stations and reaching the same terminal, specifically includes:

Defining the frame header of the relay station that starts to forward the downlink service, and the offset of the physical resource occupied by each service forwarded by the relay station relative to the downlink frame header position of the relay station and the base station frame header of the service sent by the base station The position offset is the same, or the difference between the two is constant; the base station adjusts the engraving of each relay station to start forwarding the downlink service by signaling, so that each relay station starts to forward the synchronization of the downlink service.

[11] The relay forwarding method for broadband wireless access according to claim 8 or 9, wherein the base station adjusts each relay station to forward an uplink signal from the terminal, so that the relay station passes through different relay stations. The process of the inter-time synchronization of the forwarded uplink signal to the base station includes: the offset of the physical resource occupied by each service forwarded by the relay station relative to the downlink frame header position of the relay station, and the base station receiving the service engraving relative to the base station frame header The position offset is the same or the difference between the two is a fixed value;

The base station adjusts the engraving of each relay station to start forwarding the uplink service by signaling, so that each relay station starts to forward the synchronization of the uplink service.

[12] 12. A base station, comprising:

a module for allocating physical resources for each service link of a terminal controlled by each relay station controlled by the base station;

And a module for notifying the location of each physical station by using location information of physical resources occupied by each service link of the terminal controlled by each of the allocated relay stations by signaling.

[13] The base station according to claim 12, wherein the module for allocating physical resources for each service link of a terminal controlled by each relay station controlled by the base station comprises: a module for allocating contiguous physical resources for accessing broadcast and multicast services; a downlink service link for all terminals controlled by the relay station other than the broadcast and multicast services of the first relay station except for multiple base stations a module for allocating resources;

Broadcast and multicast services for access by multiple base stations for other relay stations controlled by the base station in turn A module that allocates resources to all downlink service links of terminals that are not yet allocated resources.

[14] The base station according to claim 13, wherein the module for allocating physical resources for each service link of the terminal controlled by each relay station controlled by the base station further includes: A module that allocates downlink resources to a terminal directly controlled by the base station.

[15] The base station according to claim 13 or 14, wherein the all of the broadcast and multicast services for the first relay station except the multi-base station access are controlled by the relay station. The module for allocating resources of the downlink service link of the terminal further includes:

a module for allocating contiguous physical resources for different service links of the same terminal; a module for allocating contiguous physical resources for different terminals having the same relay station in the macro diversity set

[16] The base station according to claim 12, wherein the module for allocating physical resources for each service link of a terminal controlled by each relay station controlled by the base station comprises: a module of all the relay stations of the relay station that allocate resources to the uplink of the terminal controlled by the relay station;

A module for allocating resources to all uplinks of all terminals that are not yet allocated resources for all other relay stations controlled by the base station.

[17] The base station according to claim 16, wherein the module for allocating physical resources for each service link of a terminal controlled by each relay station controlled by the base station further includes: A module that allocates uplink resources by a terminal directly controlled by the base station.

[18] 18. The base station according to claim 16 or 17, wherein the module for allocating resources for all uplinks of terminals of the first relay station controlled by the relay station further comprises: A module for allocating contiguous physical resources for different service links of the same terminal; a module for allocating contiguous physical resources for different terminals having the same relay station in the macro diversity set

[19] The base station according to claim 12, wherein the base station further comprises:

For adjusting the timing of each relay station to start forwarding the downlink terminal service from the base station, synchronizing the received signals arriving at the same terminal through different relay stations; and adjusting the relaying of each uplink station to forward the uplink signal from the terminal, so that the different relay stations are passed through The forwarded uplink signal arrives at the base station A module that synchronizes between days.

[20] 20. The base station according to claim 12, wherein the base station further comprises:

A module for macrodiversity or selective merging of data forwarded by a plurality of relay stations received by a peer.

[21] The base station according to claim 19, wherein the determining is used to adjust the time when each relay station starts to forward the downlink terminal service from the base station, so that the received signal arrives at the same terminal through different relay stations. Synchronizing; and adjusting, for each relay station, the engraving of the uplink signal from the terminal, so that the module that transmits the uplink signal forwarded by the different relay station to the inter-base synchronization of the base station includes a frame header for defining the relay station to start forwarding the downlink service, which is a relay station. The offset between the physical resource occupied by each service forwarded by the relay station and the downlink frame header position of the relay station is the same as the position offset of the service relative to the base station frame header sent by the base station, or the difference between the two is constant, and then passed The signaling adjusts the moment when each relay station starts to forward the downlink service, so that each relay station starts to forward the synchronization of the downlink service.

[22] 22. The base station according to claim 19, wherein the adjusting for each relay station to start forwarding the downlink terminal service from the base station, so that the receiving signal is forwarded to the same terminal by different relay stations Synchronizing; and adjusting the moment when each relay station forwards the uplink signal from the terminal, so that the uplink signal that is forwarded by different relay stations arrives at the base station is further:

The offset of the physical resource occupied by each service for forwarding the relay with respect to the downlink frame header position of the relay station is the same as the position offset of the base station receiving the service engraving relative to the base station frame header, or the difference between the two is a fixed value, and then By relaying, each relay station starts to forward the uplink service, so that each relay station starts to forward the module of the uplink synchronization of the uplink service.

[23] 23. A relay station, comprising:

a module for extracting, from signaling sent by a base station, location information of physical resources occupied by all service links of terminals controlled by the base station;

Receiving, by the base station, the downlink service sent by the base station and the uplink service sent by the terminal, and forwarding the downlink service to the controlled end of the physical resource occupied by the service link of the terminal that is controlled by the terminal The terminal that forwards the uplink service to the module of the base station.

[24] 24. The relay station according to claim 23, wherein the relay station further comprises: an engraving for receiving a base station adjustment to start forwarding a downlink terminal service from the base station, and a start forwarding of the receiving base station adjustment comes from The engraved module of the uplink signal of the terminal.

[25] 25. A relay forwarding system for broadband wireless access, comprising:

a base station, configured to allocate physical resources to each service link of a terminal controlled by each relay station controlled by the base station; and to locate a physical resource occupied by each service link of the terminal controlled by the allocated relay station by signaling Information notifying each of the relay stations;

a relay station, configured to extract location information of physical resources occupied by all service links of the terminal controlled by the base station, and receive, at the corresponding location, the terminal controlled by the base station The downlink service forwards the received downlink service to the terminal controlled by the terminal, and forwards the uplink service of the terminal controlled by the terminal to the base station.

[26] The relaying and forwarding system for broadband wireless access according to claim 25, wherein the base station specifically includes:

[27] 27. The relay forwarding system for broadband wireless access according to claim 25 or 26, wherein the relay station specifically comprises:

Receiving, by the base station, the downlink service sent by the base station and the uplink service sent by the terminal, and forwarding the downlink service to the terminal controlled by the terminal, where the physical resource occupied by the service link of the terminal controlled by the terminal is received, The module that forwards the uplink service to the base station.