WO2009109076A1

WO2009109076A1 - Methods of selecting communication paths for a mobile station in a wireless relay network and the equipments thereof

Info

Publication number: WO2009109076A1
Application number: PCT/CN2008/001959
Authority: WO
Inventors: 沈钢; 刘继民; 金珊
Original assignee: 阿尔卡特朗讯
Priority date: 2008-03-06
Filing date: 2008-12-02
Publication date: 2009-09-11
Also published as: CN101527947A; CN101527947B

Abstract

A method of selecting communication paths for a mobile station in a wireless relay network and the equipments thereof are provided by the present invention. A base station selects a better communication path for a mobile station according to the acquired link quality information of links in one communication path or more communication paths. In the present invention, the mobile station itself or a relay station is also able to collect the link quality information of every link, and select a better communication path for the mobile station according to the link quality information of every link. Compared to the transparent relay and the un-transparent relay in the current technology, the scheme provided by the present invention integrates the advantages of the two relay operation modes, and also discards their respective disadvantages simultaneously. The base station/relay station/mobile station may select an uplink communication path or a downlink communication path for the mobile station according to the acquired link quality information of links in one communication path or more communication paths, wherein the uplink communication path and the downlink communication path may be the same path and may also be different paths.

Description

Wireless relay network for mobile terminals

Method and apparatus for selecting a communication path

The present invention relates to a wireless relay network, and more particularly to a mobile terminal, a relay station, and a base station in a wireless relay network. Background technique

In IEEEE 802.16j, two multi-hop relay modes of operation and their respective frame structures are defined: transparent relay and opaque relay. However, due to backward capacity limitations, they cannot be directly used for 802.16m multi-hop relay support. 802.16m mobile stations support an enhanced multi-hop relay protocol.

For the two multi-hop relay modes defined in IEEEE 802.16j, the relay station can only work in one mode at the same time. The trunk mode of operation should be set when the network is deployed, or when the trunk joins the network.

The transparent relay mode and its corresponding frame structure were proposed by Alcatel-Lucent. The program has been accepted and incorporated into the standard. In the transparent relay working mode, the mobile terminal associated with the relay station is within the coverage of the base station, and the preamble symbol and mapping table sent by the base station can be directly sent to the mobile terminal without relaying the relay station. The relay station does not pass the leading symbols and mapping tables. All mobile terminals and base stations in the same multi-hop cell are synchronized by the preamble symbol and the multi-hop base station, and acquire an uplink/downlink communication path mapping table. The data service is relayed according to the resource allocation in the mapping table. Transparent relay is used to increase throughput, and the mobile terminal is within the coverage of the base station broadcast information. The frame structure of the transparent relay reduces the transmission delay of the downlink control signaling, and also simplifies the design of the relay station and reduces the complexity of the relay station. Since all mobile terminals under one base station cell are synchronized to the same preamble, it also eliminates frequent intra-station handovers. Moreover, the frame structure of the transparent relay has less overhead than the opaque relay. Its shortcoming is that it cannot support the expansion of coverage. The reason is that the mobile terminals must be within the coverage of the base station to receive broadcast control information directly from the base station.

In contrast, in the opaque relay mode, the relay station is responsible for the downlink subframe. The leading symbols and mapping tables are issued. Thus, the mobile terminal regards it as a base station. All data and control signaling between the multi-hop base station and the mobile terminal are relayed, and the opaque relay mode can support coverage expansion to provide services for mobile terminals beyond the base station range. However, since all control signaling must be subject to multi-hop relay with data traffic, there is a delay in control signaling. Additional relay maps and preamble symbols, etc. increase overhead. Each relay station must specify a field to occupy, which is not flexible and efficient.

For transparent and non-transparent relays, they each have their own advantages and their corresponding application scenarios. Transparent relays are preferred when the mobile terminal is under base station coverage. For the purpose of expanding coverage, only non-transparent relays can be used. Therefore, these two multi-hop relay modes coexist in 802.16j. Thus two different relay frame structures must be defined in a standard that considers backward capacity. This makes it difficult to coexist with two types of relay stations in one base station cell. Moreover, when the mobile terminal is within the coverage of the base station and the relay station at the same time, determining the optimal relay mode becomes a difficulty.

At the same time, when determining the relay mode adopted by the mobile terminal, the base station generally measures the uplink ranging signal communication quality through the ranging channel, and determines the uplink channel shield amount of the mobile terminal to the base station according to the uplink ranging signal communication quality. However, the downlink channel quality of the base station to the mobile terminal is also determined according to the uplink signal quality. This decision strategy is not very accurate because the uplink and downlink relay path performance may not be equal. The prior art can only perform transparent relay or opaque relay for uplink and downlink and their respective four-way communication such as signaling and data, and cannot separate the uplink and downlink and their respective control signaling and data communication. Unable to get optimal relay performance. Summary of the invention

In order to solve the above disadvantages in the prior art, the present invention proposes a method and apparatus for selecting a communication path for a mobile terminal in a wireless multi-hop relay network. The base station selects a preferred communication path for the mobile terminal according to the link quality information of the link in the one or more communication paths that have been acquired. Specifically, for the case where the base station selects an uplink communication path for the mobile terminal, the base station and the relay station respectively obtain measurement results indicating the quality of each uplink by monitoring the uplink signals, and summarize the measurement results to the base station, and then the Base station according to each The link quality condition of the uplink communication link is for the mobile terminal to select the uplink communication path, and further, the uplink communication path selects the selection of the communication path including the uplink control signal and the communication path selection of the uplink data signal; When the downlink communication path is selected, the base station and the relay station respectively send the coverage identification information to the mobile terminal, and the mobile terminal can determine the chain of the downlink communication link between the base station and the relay station to the mobile terminal according to the received coverage identification information. The quality of the road is provided by the mobile terminal to the base station, and the base station selects the downlink communication path for the mobile terminal according to the link quality of each downlink communication link. Further, the selection of the downlink communication path includes the downlink control signal. Selection of the communication path and selection of the communication path of the downlink data signal. Of course, in the present invention, the link quality information of each link may be summarized by the mobile terminal itself or the relay station, and the preferred communication path is selected for the mobile terminal according to the link quality information of each link.

According to a first aspect of the present invention, a method for selecting a communication path for a mobile terminal in a base station of a wireless multi-hop relay network is provided, wherein the method includes the following steps: a. acquiring the base station and the mobile station Link quality information of links in one or more communication paths between terminals; b. link quality information of links in one or more communication paths acquired, based on predetermined rules, from A preferred communication path is selected for the mobile terminal in one or more communication paths.

According to a second aspect of the present invention, a method for assisting in selecting a communication path for a mobile terminal in a mobile terminal of a wireless relay network is provided, wherein the communication path includes a downlink communication path, including the following Steps: I. Receive coverage identifier information from other network devices, where the coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the other network device, and to assist the mobile terminal. Determining link quality information of the downlink communication link of the other network device to the mobile terminal; and determining, according to the coverage identifier information, link quality information of the downlink communication link of the network device to the mobile terminal; The method further includes the following steps: X. determining downlink communication path related information of the mobile terminal according to the determined link quality information of the link in one or more downlink communication paths; Y. correlating the determined downlink communication path The information is provided to the base station to which the mobile terminal belongs. According to a third aspect of the present invention, a method for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, wherein the method includes the following steps: i. acquiring the present relay station and the mobile station The link quality information of the link in one or more communication paths between the terminals; ii. determining the relay communication path related information of the relay station according to the link quality information of the links in the acquired one or more communication paths Iii. Providing the determined relay communication path related information of the present relay station to the base station.

According to a fourth aspect of the present invention, a method for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, wherein the communication path includes a downlink communication path includes the following steps: A. Send coverage identification information.

According to a fifth aspect of the present invention, a method for selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network is provided, comprising the steps of: S. acquiring a piece related to the mobile terminal Or link shield information of the links in the plurality of communication paths; T. based on the link quality information of the links in the one or more communication paths that have been acquired, from the one or more communication paths based on a predetermined rule A preferred communication path is selected for the mobile terminal.

According to a sixth aspect of the present invention, a base station selection apparatus for selecting a communication path for a mobile terminal in a base station of a wireless multi-hop relay network, includes: first acquiring means, configured to acquire the base station and The link quality information of the link in the one or more communication paths between the mobile terminals; the first selecting means, configured to use link quality information of the links in the one or more communication paths that have been acquired, A preferred communication path is selected for the mobile terminal from the one or more communication paths based on a predetermined rule.

According to a seventh aspect of the present invention, there is provided a first auxiliary selecting apparatus for assisting in selecting a communication path for a mobile terminal in a mobile terminal of a wireless relay network, wherein the communication path includes downlink communication The path includes: a fifth receiving device, configured to receive coverage identifier information from another network device, where the coverage identifier information is used to assist the mobile terminal to learn whether it is in the coverage of the other network device, And the link quality information for assisting the mobile terminal to determine the downlink communication link of the other network device to the mobile terminal; the second determining means, configured to determine the network device to the mobile based on the coverage identifier information Downlink communication link of the terminal The link quality information, wherein the third determining means is configured to determine, according to the determined link quality information of the link in the one or more downlink communication paths, the downlink communication path related information of the mobile terminal; And a providing apparatus, configured to provide the determined downlink communication path related information to the base station to which the mobile terminal belongs.

According to an eighth aspect of the present invention, a second auxiliary selection device for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, includes: a second acquisition device, configured to: Obtaining link quality information of a link in one or more communication paths between the relay station and the mobile terminal; and fourth determining means, configured to: according to the link quality of the link in the one or more communication paths that have been acquired The information is used to determine the relay communication path related information of the relay station; the second providing means is configured to provide the determined relay communication path related information of the present relay station to the base station.

According to a ninth aspect of the present invention, a third auxiliary selecting apparatus for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, wherein the communication path includes a downlink communication path, The method includes: a third sending device, configured to send coverage identifier information.

According to a tenth aspect of the present invention, a relay station selection apparatus for selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, includes: a third acquisition apparatus, configured to acquire The path quality information of the one or more communication paths related to the mobile terminal; the second selecting means, configured to: according to the path quality information of the one or more communication paths that have been acquired, from the one or more pieces based on a predetermined rule A preferred communication path is selected for the mobile terminal in the communication path.

In the present invention, the base station selects a preferred communication path for the mobile terminal according to the link quality information of the link in the one or more communication paths that have been acquired. Specifically, for the case where the base station selects an uplink communication path for the mobile terminal, the base station and the relay station respectively obtain measurement results indicating the quality of each uplink by monitoring the uplink signals, and summarize the measurement results to the base station, and then the The base station selects an uplink communication path for the mobile terminal according to the link quality condition of each uplink communication link; and when the base station selects a downlink communication path for the mobile terminal, the base station and the relay station respectively send the coverage identifier information to the mobile terminal. The mobile terminal can determine the base according to the received coverage identification information. The link quality of the downlink communication link between the station and the relay station to the mobile terminal, the mobile terminal provides each link quality to the base station, and the base station selects the downlink communication path for the mobile terminal according to the link quality of each downlink communication link. . Of course, in the present invention, the link quality information of each link may be summarized by the mobile terminal itself or the relay station, and the preferred communication path is selected for the mobile terminal according to the link quality information of each link.

Compared with the transparent relay and the non-transparent relay in the prior art, the technical solution proposed by the present invention combines the advantages of the two relay working modes, and also discards their respective shortcomings. The base station/relay station/mobile terminal may select an uplink communication path and a downlink communication path for the mobile terminal according to the link quality information of the link in the one or more communication paths that have been acquired, and the uplink communication link and the downlink communication link may be The same path may be a different path, where the uplink/downlink communication path includes an uplink/downlink control signal communication path and an uplink/downlink data signal communication path, and the uplink control signal communication path may be different from the uplink data signal communication path, and the downlink The control signal communication path can be different from the downstream data signal communication path.

DRAWINGS

Other features, objects, and advantages of the present invention will become more apparent from the detailed description of the accompanying drawings.

1 shows a schematic diagram of a network topology in which a mobile terminal 1 is in coverage of both a relay station 2 and a base station 3 in a wireless multi-hop relay network according to an embodiment of the present invention;

2 is a flow chart showing a system method for a base station to select a preferred downlink communication path for a mobile terminal according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing the network topology of the mobile terminal 1 in the coverage of the relay station 2a, the relay station 2b and the base station 3 in the wireless multi-hop relay network according to an embodiment of the present invention;

4 shows a network extension of a relay terminal 2b relaying signals from a relay station 2a in a wireless multi-hop relay network in which the mobile terminal 1 is in coverage of both the relay station 2a and the base station 3, in accordance with an embodiment of the present invention. Schematic diagram of the structure of Park; Figure 5 shows a specific embodiment of the present invention. In a wireless multi-hop relay network, the mobile terminal 1 is within the coverage of the relay stations 2a, 2b and 2d, and the signals of the relay stations 2a and 2b are again used by the relay station 2c. A schematic diagram of a network topology structure relayed to the base station 3;

6 shows a flow chart of a system method for a mobile terminal to select a preferred downlink communication path for itself according to an embodiment of the present invention;

7 is a block diagram showing the structure of each device in a system in which a base station selects a preferred downlink communication path for a mobile terminal according to an embodiment of the present invention;

Figure 8 is a block diagram showing the structure of various devices in a system in which a mobile terminal selects a preferred downlink communication path for itself according to an embodiment of the present invention.

In the figures, the same or similar reference numerals denote the same or similar components. detailed description

The invention is described in detail below with reference to the accompanying drawings:

First embodiment

1 shows a schematic diagram of a network topology in which the mobile terminal 1 is in the coverage of both the relay station 2 and the base station 3 in a wireless multi-hop relay network according to a specific embodiment of the present invention. Fig. 1 shows a mobile terminal 1, a relay station 2, and a base station 3. The downlink communication link between the base station 3 and the mobile terminal 1 is L1, the downlink communication link between the relay station 2 and the mobile terminal 1 is L2, and the uplink communication link of the mobile terminal 1 to the base station 3 is L3, and the mobile terminal 1 The uplink communication link to the relay station 2 is L4, the downlink communication link from the base station 3 to the relay station 2 is L5, and the uplink communication link from the relay station 2 to the base station 3 is L6. Although only one relay station is shown in FIG. 1, a plurality of relay stations may be included in the wireless multi-hop relay station network in a specific application, which should be understood by those skilled in the art, and details are not described herein.

Further, the following description will be respectively made for the case where the base station 3 performs the selection of the downlink communication path for the mobile terminal 1 and the selection of the uplink communication path for the mobile terminal 1.

I) base station 3 selects the downlink communication path for the mobile terminal 1

2 is a flow chart of a system method for a base station to select a preferred downlink communication path for a mobile terminal according to an embodiment of the present invention. A scenario in which the base station selects a preferred downlink communication path for the mobile terminal in the technical solution of the present invention will be described in detail below with reference to FIG. 1 and FIG.

Specifically, the base station 3 and the relay station 2 first transmit the broadcast control information to the mobile terminal 1 at the same time. Further, the broadcast control information includes a preamble symbol, where the preamble symbol is used for synchronization, when the mobile terminal 1 enters the wireless multi-hop. Following the network, a reference point is found for the mobile terminal 1.

Preferably, the broadcast control information may further include an address for indicating the start of the BS mapping table, to notify the start address of the mobile terminal IBS mapping table, and an address for indicating the start of the RS mapping table, to notify the mobile terminal 1RS mapping The starting address of the table. The BS mapping table is used to indicate the resource allocation of the base station (BS) and the relay station (RS) below it, and the RS mapping table is used to indicate the resource allocation of the relay station (RS) and the mobile terminal (MS) below it.

Then, in step S1, the base station 3 transmits the first coverage identification information to the mobile terminal 1, where the first coverage identification information is used to assist the mobile terminal 1 to know whether it is within the coverage of the base station 3.

Preferably, the first coverage identifier information may include an address for indicating the start of the BS mapping table to inform the mobile terminal of the start address of the IBS mapping table.

In step S2, the relay station 2 transmits the second coverage identification information to the mobile terminal 1, wherein the second coverage identification information is used to assist the mobile terminal 1 to know whether it is within the coverage of the relay station 2.

Preferably, the second coverage area identification information may include an address for indicating the start of the RS mapping table to inform the mobile terminal of the start address of the 1RS mapping table.

It should be noted that the base station 3 and the relay station 2 can respectively transmit the first coverage identifier information and the second coverage identifier information in the following two manners.

The first mode: the base station 3 and the relay station 2 respectively occupy different time-frequency resources and send the first coverage identifier information and the second coverage identifier information to the mobile terminal.

Specifically, when the base station 3 transmits the first coverage identification information to the mobile terminal 1, the relay station 2 remains silent, and when the relay station 2 transmits the second coverage identification information to the mobile terminal 1, the base station 3 remains silent. For the first case, the first coverage identifier information and the second coverage identifier information may be the same identifier information, or may be different identifier information.

When the two are different coverage identification information, preferably, the first coverage identification information includes identity identification information for identifying the base station 3, and the second coverage identification information includes identity identification information for identifying the relay station 2.

The second mode: the base station 3 and the relay station 2 simultaneously send the first coverage identifier information and the second coverage identifier information to the mobile terminal 1

Specifically, the first coverage identifier information and the second coverage identifier information are simultaneously transmitted. Therefore, in order to facilitate the mobile terminal 1 to distinguish the first coverage identifier information and the second coverage identifier information, Different codes, preferably, CDMA codes can be employed.

For the second case, the first coverage identification information and the second coverage identification information must be different identification information.

Preferably, the first coverage area identification information includes identity identification information for identifying the base station 3, and the second coverage area identification information includes identity identification information for identifying the relay station 2.

For convenience of description, in the present embodiment, we exemplify in the first manner described above. Subsequently, in step S3, the mobile terminal 1 receives the first coverage identification information from the base station 3 and determines the link quality information of the downlink communication link L1 according to the identification information, and receives the second coverage identification information from the relay station 2. And determining the link quality information of the downlink communication link L2 according to the identification information.

Specifically, after receiving the first coverage identifier information from the base station 3, the mobile terminal 1 determines the link quality information of the downlink communication link L1 according to the power size, the delay size, and the like of the received identifier information.

Similarly, after receiving the second coverage identification information from the relay station 2, the mobile terminal 1 determines the link shield information of the downlink communication link L2 according to the power magnitude of the received identification information, the size of the delay, and the like.

Then, proceeding to step S4, the mobile terminal 1 provides the determined link quality information of the downlink communication link L1 and the link quality information of the downlink communication link L2 to the base station 3.

Further, the mobile terminal 1 can directly connect the downlink communication link L1 and the downlink communication link. The link quality information of L2 is transmitted to the base station 3, or may be forwarded to the base station 3 via the relay station 2. Further, when the wireless multi-hop relay network includes a plurality of relay stations, that is, when the mobile terminal 1 is covered by a plurality of relay stations, the mobile terminal 1 provides link quality information of the plurality of downlink communication links. At the same time as the base station 3, the identity identification information of each relay station corresponding to each downlink communication link is also provided to the base station 3, so that the base station 3 identifies each link quality information.

Finally, in step S5, the base station 3 moves from the downlink communication link L1 and the downlink communication link L2 based on the received link quality information of the downlink communication link L1 and the downlink communication link L2 based on a predetermined rule. Terminal 1 determines a preferred downlink communication path.

Preferably, the base station 3 combines the received link quality information of the downlink communication link L2 with the link quality information of the downlink L5 of the base station 3 to the relay station 2, and with the received downlink communication link L1. The link quality information is compared to determine a preferred downlink communication path for the mobile terminal 1.

Further, the base station 3 can select the communication path of the downlink control signal and the communication path of the downlink data signal for the mobile terminal 1, respectively.

Specifically, the predetermined rule may include the magnitude of the signal power, the length of the signal delay, or a combination of these factors for consideration. Of course, other predetermined rules may also be included, which should be understood by those skilled in the art. This will not be repeated.

II) Base station 3 selects the uplink communication path for the mobile terminal 1

First, the mobile terminal 1 transmits an uplink signal to the relay station 2 and the base station 3 through the universal ranging subchannel.

Further, the uplink signal may include a ranging signal, or uplink data.

Then, after monitoring the uplink signal through the universal ranging subchannel, the relay station 2 estimates the distance between the mobile terminal 1 and the present relay station 2 according to the signal size of the uplink signal, to determine the uplink communication chain of the mobile terminal 1 to the relay station 2. The link quality information of the path L4, and the determined link quality information is transmitted to the base station 3.

Similarly, after detecting the uplink signal by using the universal ranging subchannel, the base station 3 estimates the distance between the mobile terminal 1 and the local base station 3 according to the signal size of the uplink signal, to determine the shift. Link quality information of the uplink communication link L3 from the mobile terminal 1 to the base station 3.

Preferably, the relay station 2 and the base station 3 simultaneously monitor the universal ranging subchannel. Subsequently, the base station 3 is based on the received link quality information of the uplink communication link L4 from the relay station 2 and the determined link quality information of the uplink communication link L3 of the mobile terminal 1 to the base station 3, based on a predetermined rule, A preferred uplink communication path is determined for the mobile terminal 1.

Preferably, the base station 3 considers the received link quality information of the uplink communication link L4 and the link quality information of the uplink station 6 of the relay station 2 to the base station 3 in combination with the determined mobile terminal 1 to the base station. The link quality information of the uplink communication link L3 of 3 is compared to determine a preferred uplink communication path for the mobile terminal 1.

Further, the base station 3 can select the communication path of the uplink control signal and the communication path of the uplink data signal for the mobile terminal 1, respectively.

In summary, the base station 3 will select the following four communication paths for the mobile terminal 1 respectively: a communication path of the uplink control signal, a communication path of the uplink data signal, a communication path of the downlink control signal, and a communication path of the downlink data signal. Referring to the network topology structure of FIG. 1, the selection mode in which the base station 3 performs the communication path for the mobile terminal 1 includes but is not limited to the following five types:

> All four communication paths are not relayed;

> The communication path of the downlink control signal is relayed, and the other three communication paths are not relayed; > The communication path of the uplink and downlink control signals is not relayed, and the communication paths of the uplink and downlink data signals are relayed;

> All four communication paths are relayed;

> The communication path of the uplink control signal and the uplink data signal is not relayed, and the communication path of the downlink control signal and the downlink data signal is relayed.

The above first embodiment details the case where the mobile terminal 1 is within the coverage of both the relay station 2 and the base station 3. Those skilled in the art should understand that the technical solution of the present invention is not limited to the network topology shown in FIG. 1. Fig. 3 is a modification of the above-described first embodiment. As shown in Fig. 3, the mobile terminal 1 is simultaneously within the coverage of the relay station 2a, the relay station 2b, and the base station 3.

The mobile terminal 1, the relay station 2a, the relay station 2b, and the base station 3 are shown in FIG. The downlink communication link between the base station 3 and the mobile terminal 1 is L1, the downlink communication link between the relay station 2a and the mobile terminal 1 is L2, and the uplink communication link of the mobile terminal 1 to the base station 3 is L3. The uplink communication link of the mobile terminal 1 to the relay station 2a is L4, the downlink communication link of the base station 3 to the relay station 2a is L5, the uplink communication link of the relay station 2a to the base station 3 is L6, and the relay station 2b to the mobile terminal 1 The downlink communication link is L7, the uplink communication link of the mobile terminal 1 to the relay station 2b is L8, the downlink communication link of the base station 3 to the relay station 2b is 9, and the uplink communication link of the relay station 2b to the base station 3 is L10. '.

Specifically, for the case where the base station 3 determines the downlink communication link for the mobile terminal 1, the base station 3 is based on the link quality information of the downlink communication link L1', the downlink communication link L2, and the downlink communication link L7, and is based on the reservation. The rule determines a preferred downlink communication path for the mobile terminal 1.

Preferably, the base station 3 combines the downlink communication link L2 with the downlink communication link L5, and combines the downlink communication link L7 with the downlink communication link L9, and compares it with the downlink communication link L1. A preferred downlink communication path is determined for the mobile terminal 1.

For the case where the base station 3 determines the uplink communication path for the mobile terminal 1, the base station 3 determines the link quality information according to the uplink communication link L3, the uplink communication link L4, and the uplink communication link L8, and based on the predetermined rule, The mobile terminal 1 determines a preferred uplink communication path.

Preferably, the base station 3 combines the uplink communication link L4 with the uplink communication link L6, and combines the uplink communication link L8 with the uplink communication link L10, and compares it with the uplink communication link L3. A preferred uplink communication path is determined for the mobile terminal 1.

For the specific determination steps described above, refer to the above description of FIG. 1 and FIG. 2. For the sake of brevity, no further details are provided herein.

4 is another variation of the above-described first embodiment. As shown in FIG. 4, the mobile terminal 1 is within the coverage of the relay station 2a and the base station 3, and the mobile terminal 1 is not within the coverage of the relay station 2b, and the relay station 2b Used to relay signals from the relay station 2a to the base station 3.

The mobile terminal 1, the relay station 2a, the relay station 2b, and the base station 3 are shown in FIG. among them, The downlink communication link of the base station 3 to the mobile terminal 1 is L1", the downlink communication link of the relay station 2a to the mobile terminal 1 is L2", the downlink communication link of the relay station 2b to the relay station 2a is L5", and the base station 3 to the relay station 2b The downlink communication link is L7", the uplink communication link of the mobile terminal 1 to the base station 3 is L3", the uplink communication link of the mobile terminal 1 to the relay station 2a is L4", and the uplink communication link of the relay station 2a to the relay station 2b is L6 "The uplink communication link from the relay station 2b to the base station 3 is L8", the downlink communication link from the base station 3 to the relay station 2a is L9", and the uplink communication link from the relay station 2a to the base station 3 is L10".

Specifically, for the case where the base station 3 determines the downlink communication path for the mobile terminal 1, the mobile terminal 1 first determines the link quality information of the downlink communication link L1" and the link quality information of the downlink communication link L2", and provides it. To the base station 3.

The relay station 2b provides the link quality information of the downlink communication link L5" to the base station 3. The base station 3 transmits the link quality information of the downlink communication link L2, the link quality information of the downlink communication link L5", and the downlink communication chain. Considering the link quality information of the path L7", considering the link quality information of the downlink communication link L2" and the link quality information of the downlink communication link L9", and the link quality of the downlink communication link L1" The information is compared, and a preferred downlink communication path is selected for the mobile terminal 1 based on predetermined rules.

For the case where the base station 3 determines the uplink communication path for the mobile terminal 1, the relay station 2a determines the link quality information of the uplink communication link L4" and supplies it to the base station 3.

The relay station 2b provides the link quality information of the uplink communication link L6" to the base station 3. The base station 3 will link the link quality information of the uplink communication link L4, the link quality information of the uplink communication link L6", and the uplink communication chain. Considering the link quality information of the path L8", considering the link quality information of the uplink communication link L4" and the link quality information of the uplink communication link L10", and the link quality of the uplink communication link L3" The information is compared, and a preferred uplink communication path is selected for the mobile terminal 1 based on predetermined rules.

In each of the above cases, the base station 3 summarizes the link quality information of the links in all the communication paths between the mobile terminal 1 and the own base station 3, and selects the preferred uplink communication path and the downlink communication path from all the paths. In a modified embodiment, after obtaining the link quality information of the link in the communication path between the relay station and the mobile terminal, the relay station may first select a communication path with better quality, and the local communication channel is better. Link quality of the link Information is provided to the base station. The base station further determines a path for communication between the base station and the mobile terminal according to link quality information of the link in the local preferred communication path and link quality information of the link in other communication paths that may exist. This method of pre-selection by the relay station can effectively reduce the amount of information reported by the relay station to the base station and reduce the computational load of the base station for path selection. Therefore, there are the following variations.

Figure 5 shows that the mobile terminal 1 is within the coverage of the relay stations 2a, 2b and 2d, the signals of the relay stations 2a and 2b are again relayed by the relay station 2c to the base station 3, and the mobile terminal 1 is not in accordance with an embodiment of the present invention. A schematic diagram within the coverage of the relay station 2c and the base station 3. Referring to Fig. 5, the case where the relay station selects a local preferred communication path for the mobile terminal and provides the selection result to the base station, and the base station makes the final selection of the preferred communication path will be described in detail in the technical solution of the present invention.

a) the relay station 2c selects the locally preferred downlink communication path for the mobile terminal 1. Specifically, the relay stations 2a, 2b and 2d first transmit the broadcast control information to the mobile terminal 1 at the same time. Further, the broadcast control information includes a preamble symbol, wherein The preamble symbol is used for synchronization. When the mobile terminal 1 enters the wireless multi-hop relay network, a reference point is found for the mobile terminal 1.

Preferably, the broadcast control information may further include an address for indicating the start of the BS mapping table, to inform the mobile terminal of the start address of the IBS mapping table, and an address for indicating the start of the RS mapping table, to notify the mobile terminal of the 1RS mapping. The starting address of the table.

For convenience of description, in the following, we use the relay station 2a, the relay station 2b, and the relay station 2d to respectively transmit different coverage information of the time-frequency resources to the mobile terminal 1 for example.

Then, the relay station 2a first transmits the first coverage identification information to the mobile terminal 1, and secondly, the relay station 2b transmits the second coverage identification information to the mobile terminal 1, and again, the relay station 2d transmits the third coverage identification information to the mobile terminal 1.

Of course, the relay station 2c and the base station 3 also transmit the coverage identification information, but the coverage range identification information from the relay station 2c and the base station 3 cannot be received because the mobile terminal is not within its coverage.

Subsequently, the mobile terminal 1 receives the first coverage identification information from the relay station 2a and determines the link quality information of the downlink communication link La according to the identification information, and receives the relay from the relay. The second coverage identifier information of the station 2b determines the link shield information of the downlink communication link Lb according to the identifier information, and receives the third coverage identifier information from the relay station 2d and determines the downlink communication link Le according to the identifier information. Link quality information.

Then, the mobile terminal 1 supplies the link quality information of the downlink communication link La and the downlink communication link Lb to the relay station 2c, and supplies the link quality information of the downlink communication link Le to the base station 3. Specifically, the mobile terminal 1 transmits the determined link quality information of the downlink communication link La to the relay station 2a, and the relay station 2a transmits the link quality information to the relay station 2c; the mobile terminal 1 sets the determined downlink communication link. The link quality information of Lb is transmitted to the relay station 2b, and the relay station 2b transmits the quality information to the relay station 2c.

Then, the relay station 2c determines a preferred downlink communication path of the relay station 2c to the mobile terminal 1 for the mobile terminal 1 based on the predetermined rule based on the received link quality information of the downlink communication link La and the downlink communication link Lb.

Preferably, the relay station 2c combines the link quality information of the received downlink communication link La with the link quality information of the downlink communication link La of the relay station 2c to the relay station 2a, and considers the received downlink communication link Lb. The link quality information is combined with the link quality information of the relay station 2c to the downlink communication link Lb of the relay station 2b to determine the preferred downlink communication path of the relay station 2c to the mobile terminal 1 for the mobile terminal 1.

Finally, the relay station 2c transmits the link quality information of the determined relay station 2c to the link in the preferred downlink communication path of the mobile terminal 1 to the base station 3, so that the base station 3 is better according to the relay station 2c to the mobile terminal 1. The link quality information of the link in the downlink communication path and the link quality information of the received downlink communication link Le are selected as the preferred downlink communication path for the mobile terminal 1.

b) The relay station 2c selects the locally preferred uplink communication path for the mobile terminal 1. Specifically, first, the mobile terminal 1 transmits an uplink signal to the relay station 2a, the relay station 2b, and the relay station 2d through the universal ranging subchannel.

Further, the uplink signal may include a ranging signal, or uplink data. Then, after the relay station 2a monitors the uplink signal through the universal ranging subchannel, estimating the distance between the mobile terminal 1 and the present relay station 2a according to the signal size of the uplink signal, to determine the uplink communication chain of the mobile terminal 1 to the relay station 2a. Link Lc's link quality information. Then, the relay station 2a transmits the uplink communication link Lc quality information to the relay station 2c.

After the relay station 2b monitors the uplink signal through the universal ranging subchannel, estimating the distance between the mobile terminal 1 and the present relay station 2b according to the signal size of the uplink signal, to determine the uplink communication link Ld of the mobile terminal 1 to the present relay station 2b. Link quality information. Then, the relay station 2b transmits the link quality information of the uplink communication link Ld to the relay station 2c.

After the relay station 2d monitors the uplink signal through the universal ranging subchannel, estimating the distance between the mobile terminal 1 and the present relay station 2d according to the signal size of the uplink signal, to determine the uplink communication link Lf of the mobile terminal 1 to the present relay station 2d. Link quality information. Then, the relay station 2b transmits the link quality information of the uplink communication link Lf to the base station 3.

Preferably, the relay station 2a, the relay station 2b, and the relay station 2d simultaneously monitor the universal ranging subchannel.

Subsequently, the relay station 2c is based on the received link quality information of the uplink communication link Lc from the relay station 2a and the received link quality information of the uplink communication link Ld from the relay station 2b, based on a predetermined rule, for the mobile terminal 1 A preferred upstream communication path of the mobile terminal 1 to the relay station 2c is determined.

Preferably, the relay station 2c considers the link quality information of the received uplink communication link Lc and the link quality information of the relay station 2a to the uplink Lc of the relay station 2c in combination, and the received uplink communication link Ld is considered. The link quality information and the link shield information of the relay station 2b to the uplink Ld of the relay station 2c are considered together, and the mobile terminal 1 determines the uplink communication path superior to the mobile terminal 1 to the relay station 2c based on predetermined rules.

Finally, the relay station 2c transmits the determined link quality information of the link in the preferred uplink communication path of the mobile terminal 1 to the relay station 2c to the base station 3, so that the base station 3 is better according to the mobile terminal 1 to the relay station 2c. Link quality information of the link in the uplink communication path and the received The link quality information of the received uplink communication link Lf selects a preferred uplink communication path for the mobile terminal 1. The above details the case where the base station selects a preferred uplink and downlink communication path for the mobile terminal from one or more communication paths according to a predetermined rule. In the mobile communication system, not only the base station can select, but the mobile terminal can also select a better communication link for itself according to the link quality information of the communication link obtained by the mobile terminal. This method of selection by the mobile terminal can reduce the computational load of the base station and the relay station for path selection. This case will be described in detail in the second embodiment below. Second embodiment

6 is a flow chart of a system method for a mobile terminal to select a preferred downlink communication path for itself, in accordance with an embodiment of the present invention.

The case where the mobile terminal itself selects a preferred communication path in the technical solution of the present invention will be described in detail below with reference to FIG. 1 and FIG.

Only the case where the mobile terminal 1 determines the downlink communication path for itself is considered below.

For convenience of description, the following is an example of the base station 3, the relay station 2 occupies different time-frequency resources to transmit coverage identifier information, that is, the base station 3 first sends the first coverage identifier information to the mobile terminal 1, and the relay station 2 remains silent, and then The relay station 2 transmits the second coverage identification information to the mobile terminal 1, and the base station 3 remains silent.

Then, in step S1, the base station 3 transmits the first coverage identifier information to the mobile terminal 1, where the first coverage identifier information is used to assist the mobile terminal 1 to learn that it is Whether it is within the coverage of the base station 3.

Subsequently, in step S3, the mobile terminal 1 receives the first coverage identification information from the base station 3 and determines the link quality information of the downlink communication link L1 according to the identification information, and receives the second coverage identifier from the relay station 2. The information determines the link quality information of the downlink communication link L2 based on the identification information.

Similarly, after receiving the second coverage identification information from the relay station 2, the mobile terminal 1 determines the link shield information of the downlink communication link L2 according to the power size, the delay size, and the like of the received identification information.

Then, proceeding to step S4, the mobile terminal 1 determines a preferred downlink communication for itself based on the determined link quality information of the downlink communication link L1 and the link shield information of the downlink communication link L2 based on a predetermined rule. path.

Preferably, the mobile terminal 1 combines the downlink communication link L2 with the downlink communication link L5 and compares it with the downlink communication link L1 to select a preferred downlink communication path for itself based on predetermined rules.

Finally, in step S5, the mobile terminal 1 notifies the base station 3 of the selection result for the base station 3 to allocate resources for it. The above details the case where the mobile terminal can select a preferred downlink communication path for itself according to the communication link information obtained by the mobile terminal. In the wireless multi-hop relay system, the relay station can also select a better downlink communication path and an uplink communication path for the mobile terminal according to the communication link information obtained by the relay station, and reduce the calculation load of the base station for path selection. This case will be described in detail in the following third embodiment. Third embodiment

The following will be described separately for the case where the relay station 2 performs the selection of the downlink communication path for the mobile terminal 1 and the selection of the uplink communication path for the mobile terminal 1.

i) The relay station 2 selects the downlink communication path for the mobile terminal 1

The following will be described in detail with reference to FIG. 3, in which the relay station selects a preferred downlink communication path for the mobile terminal in the technical solution of the present invention.

Here, it is assumed that the relay station 2a selects a preferred downlink communication path for the mobile terminal 1. Of course, in the specific application, the relay station 2b can also select a preferred downlink communication path for the mobile terminal 1, which should be understood by those skilled in the art, and details are not described herein.

Specifically, the base station 3, the relay station 2a, and the relay station 2b first transmit the broadcast control information to the mobile terminal 1 at the same time. Further, the broadcast control information includes a preamble symbol, wherein the preamble symbol is used for synchronization, when the mobile terminal 1 enters the When the wireless multi-hop relay network is used, a reference point is found for the mobile terminal 1.

For convenience of description, in the following, we use the base station 3, the relay stations 2a and 2b to respectively occupy different time-frequency resources to send coverage identification information to the mobile terminal 1 for example.

Further, the base station 3 first transmits the first coverage identifier information to the mobile terminal 1, wherein the first coverage identifier information is used to assist the mobile terminal 1 to know whether it is within the coverage of the base station 3.

Next, the relay station 2a transmits the second coverage identification information to the mobile terminal 1, wherein the second coverage identification information is used to assist the mobile terminal 1 to know whether it is within the coverage of the relay station 2a.

Again, the relay station 2b transmits the third coverage identification information to the mobile terminal 1, wherein the third coverage identification information is used to assist the mobile terminal 1 to know if it is within the coverage of the relay station 2b.

Subsequently, the mobile terminal 1 receives the first coverage identification information from the base station 3 and determines the link quality information of the downlink communication link L1 according to the identification information, from the relay station 2a. The second coverage identification information is determined according to the identification information, the link quality information of the downlink communication link L2, and the third coverage identification information from the relay station 2b, and the chain of the downlink communication link L7' is determined according to the identification information. Road quality information.

Specifically, after receiving the first coverage identifier information from the base station 3, the mobile terminal 1 determines the link shield information of the downlink communication link L1' according to the power size, the delay size, and the like of the received identifier information. .

Similarly, after receiving the second coverage identifier information from the relay station 2a, the mobile terminal 1 determines the link quality of the downlink communication link L2 according to the power magnitude, delay magnitude, and the like of the received identifier information. information.

After receiving the third coverage identifier information from the relay station 2b, the mobile terminal 1 determines the link quality information of the downlink communication link L7 according to the power size of the received message, the magnitude of the delay, and the like.

Then, the mobile terminal 1 supplies the link quality information of the determined downlink communication link L1, downlink communication link L2, and downlink communication link L7 to the relay station 2a.

Further, the mobile terminal 1 may directly transmit the link quality information of the downlink communication link L7 to the relay station 2a, or may also forward it to the relay station 2a via the relay station 2b.

Finally, the relay station 2a determines a preferred downlink communication path for the mobile terminal 1 based on the link quality information of the received downlink communication link L1, the downlink communication link L2, and the downlink communication link L7 based on predetermined rules. .

Preferably, the relay station 2a combines the link quality information of the received downlink communication link L2 with the link quality information of the downlink L5 of the base station 3 to the relay station 2a, and considers the received downlink communication link. The link quality information of L7, combined with the link quality information of the base station 3 to the downlink L9 of the relay station 2b, and the link shield of the downlink communication link L1 of the received base station 3 to the mobile terminal 1 The amount information is compared to determine a preferred downlink communication path for the mobile terminal 1.

Further, the relay station 2a can select the communication path of the downlink control signal and the communication path of the downlink data signal for the mobile terminal 1, respectively.

Specifically, the predetermined rule may include the magnitude of the received signal power, the length of the signal delay, or combine these factors for consideration. Of course, other predetermined The predetermined rules, which should be understood by those skilled in the art, are not described herein. ϋ) The relay station 2a selects the uplink communication path for the mobile terminal 1

The following will be described in detail with reference to FIG. 3, in which the relay station selects a preferred uplink communication path for the mobile terminal in the technical solution of the present invention.

Here, it is assumed that the relay station 2a selects a preferred uplink communication path for the mobile terminal 1. Of course, in the specific application, the relay station 2b can also select a preferred uplink communication path for the mobile terminal 1, which should be understood by those skilled in the art, and details are not described herein.

First, the mobile terminal 1 transmits an uplink signal to the relay station 2a, the relay station 2b, and the base station 3 through the universal ranging subchannel.

Further, the uplink signal may include a ranging signal, or uplink data.

Then, after the relay station 2a monitors the uplink signal through the universal ranging subchannel, estimating the distance between the mobile terminal 1 and the present relay station 2a according to the signal size of the uplink signal, to determine the uplink communication chain of the mobile terminal 1 to the relay station 2a. Road L4, the link shield information.

After the relay station 2b monitors the uplink signal through the universal ranging subchannel, estimating the distance between the mobile terminal 1 and the present relay station 2b according to the signal size of the uplink signal, to determine the uplink communication link L8 of the mobile terminal 1 to the present relay station 2b. , link quality information, and send it to the relay station 2a.

Similarly, after detecting the uplink signal by using the universal ranging subchannel, the base station 3 estimates the distance between the mobile terminal 1 and the local base station 3 according to the signal size of the uplink signal, to determine the uplink communication of the mobile terminal 1 to the base station 3. Link quality information of link L3.

Preferably, the relay station 2a, the relay station 2b, and the base station 3 simultaneously monitor the universal ranging subchannel.

Subsequently, the relay station 2a determines the link quality information of the uplink communication link L4' of the mobile terminal 1 to the present relay station 2a and the acquired information based on the received link quality information of the uplink communication link L8 from the relay station 2b. The link shield information of the uplink communication link L3 of the mobile terminal 1 to the base station 3 determines a preferred uplink communication path corresponding to the relay station 2a for the mobile terminal 1 based on a predetermined rule.

Preferably, the relay station 2a will link the link quality information of the received uplink communication link L8. The link quality information of the uplink L10 of the station 2b to the base station 3 is considered together, and the link quality information of the determined uplink communication link L4 and the uplink L6 of the present relay station 2a to the base station 3 are considered. The link quality information is considered in combination, and compared with the link quality information of the uplink communication link L3 of the mobile terminal 1 to the base station 3 acquired, and the optimal uplink communication is determined for the mobile terminal 1 based on a predetermined rule. path.

Further, the relay station 2a can select the communication path of the uplink control signal and the communication path of the uplink data signal for the mobile terminal 1, respectively.

As a variant embodiment of the above third embodiment, after the relay station 2a receives the link quality information from the relay station 2a of the mobile terminal 1 to the downlink communication link L2 of the mobile terminal 1, if the quality reaches a certain standard ( For example, if it is greater than a predetermined threshold, the relay station 2a directly selects the downlink communication link L2 and the downlink communication link L5 as the downlink communication path of the base station 3 to the mobile terminal 1; the relay station 2a measures the mobile terminal 1 to the relay station. After the link quality information of the uplink communication link L4 of 2a, if the quality reaches a certain standard (for example, greater than a predetermined threshold), the relay station 2a directly selects the uplink communication link L4' and the uplink communication link L6'. It is the uplink communication path from the base station 3 to the mobile terminal 1, regardless of the link quality condition of other links. Fourth embodiment

FIG. 1 shows a specific embodiment of the present invention. In a wireless multi-hop relay network, the mobile terminal 1 is in a network topology structure within the coverage of both the relay station 2 and the base station 3. FIG. 1 shows a mobile terminal 1, a relay station 2, and a base station 3. The downlink communication link between the base station 3 and the mobile terminal 1 is L1, the downlink communication link between the relay station 2 and the mobile terminal 1 is L2, and the uplink communication link of the mobile terminal 1 to the base station 3 is L3, and the mobile terminal 1 The uplink communication link to the relay station 2 is L4, the downlink communication link from the base station 3 to the relay station 2 is L5, and the uplink communication link from the relay station 2 to the base station 3 is L6. Although only one relay station is shown in FIG. 1, in the specific application, the wireless multi-hop relay station network may include multiple relays. Stations, which should be understood by those skilled in the art, are not described herein.

Figure 7 is a block diagram showing the structure of various devices in a system in which a base station selects a preferred downlink communication path for a mobile terminal according to an embodiment of the present invention. The first auxiliary selecting means 10 included in the mobile terminal 1 includes a fifth receiving means 101, a second determining means 102 and a first providing means 103. The third auxiliary control device 20 included in the relay station 2 includes a third transmitting device 201. The base station selecting means 30 included in the base station 3 includes a first transmitting means 301 and a first selecting means 302.

The following is a detailed description of the case where the base station selects a preferred downlink communication path for the mobile terminal in the technical solution of the present invention with reference to FIG. 1 and FIG.

Then, the first sending device 301 of the base station selecting device 30 included in the base station 3 transmits the first coverage identifier information to the mobile terminal 1, where the first coverage identifier information is used to assist the mobile terminal 1 to know whether it is in the base station 3. Within the coverage.

Subsequently, the third transmitting device of the third auxiliary control device 20 included in the relay station 2 The second coverage area identification information is sent to the mobile terminal 1, wherein the second coverage area identification information is used to assist the mobile terminal 1 to know whether it is within the coverage of the relay station 2.

Specifically, when the first transmitting device 301 in the base station selecting device 30 included in the base station 3 transmits the first coverage identification information to the mobile terminal 1, the relay station 2 remains silent, and when the relay station 2 includes the third auxiliary selecting device When the third transmitting device 201 in 20 transmits the second coverage identification information to the mobile terminal 1, the base station 3 remains silent.

For the first case, the first coverage identifier information and the second coverage identifier information may be the same identifier information, or may be different identifier information.

For convenience of description, in the present embodiment, we exemplify in the first manner described above. Subsequently, the fifth receiving device 101 of the first auxiliary selecting device 10 included in the mobile terminal 1 receives the first coverage identification information from the base station 3 and the second coverage identification information from the relay station 2, respectively, and then, the mobile terminal 1 The second determining device 102 of the first auxiliary selecting device 10 includes determining the link quality information of the downlink communication link L1 and the downlink communication link L2 according to the first coverage range identification information and the second coverage range identification information, respectively. Link quality information.

Specifically, after the fifth receiving apparatus 101 receives the first coverage identifier information from the base station 3, the second determining apparatus 102 of the first auxiliary selecting apparatus 10 included in the mobile terminal 1 is based on the power level of the received identification information. The case of the delay size and the like to determine the link quality information of the downlink communication link L1.

Similarly, after the fifth receiving device 101 receives the second coverage identifier information from the relay station 2, the second determining device 102 determines the downlink communication link L2 according to the power magnitude, the delay size, and the like of the received identifier information. Link quality information.

Then, the first providing device 103 of the first auxiliary selecting device 10 included in the mobile terminal 1 provides the determined link quality information of the downlink communication link L1 and the link quality information of the downlink communication link L2 to the base station 3. .

Further, the first providing device 103 may directly transmit the link quality information of the downlink communication link L1 and the downlink communication link L2 to the base station 3, or may also forward the link quality information to the base station 3 via the relay station 2.

Further, when the wireless multi-hop relay network includes a plurality of relay stations, that is, when the mobile terminal 1 is covered in the range of the plurality of relay stations, the first providing device 103 connects the link quality of the plurality of downlink communication links. While the information is provided to the base station 3, the identity identification information of each relay station corresponding to each downlink communication link is also provided to the base station 3, so that the base station 3 identifies each link quality information.

Finally, the first selection means 302 of the base station selection means 30 included in the base station 3, based on the received link shield information of the downlink communication link L1 and the downlink communication link L2, is based on a predetermined rule from the downlink communication link. A preferred downlink communication path is determined for the mobile terminal 1 in L1 and the downlink communication link L2.

Preferably, the first selection means 302 will measure the link quality of the received downlink communication link L2. The information is considered in combination with the link quality information of the downlink L5 of the base station 3 to the relay station 2, and is compared with the received link quality information of the downlink communication link L1 to determine a better downlink communication for the mobile terminal 1. path.

Further, the first selecting means 302 can select the communication path of the downlink control signal and the communication path of the downlink data signal for the mobile terminal 1, respectively.

First, the mobile terminal 1 transmits an uplink signal to the relay station 2 and the base station 3.

Further, the uplink signal may include a ranging signal, or uplink data.

Preferably, when the uplink signal is a ranging signal, the mobile terminal 1 transmits the ranging signal to the relay station 2 and the base station 3 through the universal ranging sub-channel.

Then, after the eighth receiving device of the second auxiliary selecting device included in the relay station 2 monitors the uplink signal, the fifth determining device of the second auxiliary selecting device included in the relay station 2 estimates the signal size according to the uplink signal. The distance between the mobile terminal 1 and the present relay station 2 determines the link quality information of the uplink communication link L4 of the mobile terminal 1 to the present relay station 2, and transmits the determined link quality information to the base station 3.

Similarly, after the third receiving device in the base station selecting device 30 included in the base station 3 monitors the uplink signal, the first determining device in the base station selecting device 30 included in the base station 3 estimates the mobile terminal according to the signal size of the uplink signal. 1 The distance from the base station 3 to determine the link quality information of the uplink communication link L3 of the mobile terminal 1 to the base station 3.

Preferably, the relay station 2 and the base station 3 simultaneously monitor the universal ranging subchannel. Subsequently, the first selection means 302 in the base station 3 is based on the received link quality information of the uplink communication link L4 from the relay station 2 and the determined link quality of the uplink communication link L3 of the mobile terminal 1 to the base station 3 The information, based on predetermined rules, determines a preferred uplink communication path for the mobile terminal 1.

Preferably, the first selection means 302 in the base station 3 will receive the received uplink communication link L4 The link quality information is considered in combination with the link quality information of the uplink L6 of the relay station 2 to the base station 3, and is compared with the determined link quality information of the uplink communication link L3 of the mobile terminal 1 to the base station 3, To determine a better uplink communication path for the mobile terminal 1.

Further, the first selecting means 302 in the base station 3 can select the communication path of the uplink control signal and the communication path of the uplink data signal for the mobile terminal 1, respectively.

In summary, the first selection device 302 in the base station 3 will select the following four communication paths for the mobile terminal 1 respectively: communication path of the uplink control signal, communication path of the uplink data signal, communication path of the downlink control signal, and communication of the downlink data signal path. Referring to the network topology of FIG. 1, the first selection means 302 in the base station 3 selects a communication path for the mobile terminal 1 including but not limited to the following five types:

> All four communication paths are not relayed;

> All four communication paths are relayed;

The above fourth embodiment details the case where the mobile terminal 1 is within the coverage of both the relay station 2 and the base station 3. Those skilled in the art should understand that the technical solution of the present invention is not limited to the network topology shown in FIG.

Fig. 3 is a modification of the above fourth embodiment. As shown in Fig. 3, the mobile terminal 1 is simultaneously within the coverage of the relay station 2a, the relay station 2b, and the base station 3.

The mobile terminal 1, the relay station 2a, the relay station 2b, and the base station 3 are shown in FIG. The downlink communication link between the base station 3 and the mobile terminal 1 is L1, the downlink communication link between the relay station 2a and the mobile terminal 1 is L2, and the uplink communication link of the mobile terminal 1 to the base station 3 is L3%. The uplink communication link of the mobile terminal 1 to the relay station 2a is L4, and the base station 3 to the relay station The downlink communication link of 2a is L5, the uplink communication link of relay station 2a to base station 3 is L6, the downlink communication link of relay station 2b to mobile terminal 1 is L7, and the uplink communication link of mobile terminal 1 to relay station 2b For L8, the downlink communication link from the base station 3 to the relay station 2b is 9, and the uplink communication link from the relay station 2b to the base station 3 is L10.

Specifically, for the case where the base station 3 determines the downlink communication link for the mobile terminal 1, the first selection means 302 in the base station 3 is based on the chain of the downlink communication link L1, the downlink communication link L2, and the downlink communication link L7. The road quality information, and based on predetermined rules, determines a preferred downlink communication path for the mobile terminal 1.

Preferably, the first selecting means 302 in the base station 3 combines the downlink communication link L2 with the downlink communication link L5, and combines the downlink communication link L7 with the downlink communication link L9, and communicates with the downlink. The link U, for comparison, determines a preferred downlink communication path for the mobile terminal 1.

For the case where the base station 3 determines the uplink communication link for the mobile terminal 1, the first selection means 302 in the base station 3 according to the uplink communication link L3, the uplink communication link L4, and the link quality information of the uplink communication link L8' And determining a preferred uplink communication path for the mobile terminal 1 based on predetermined rules.

Preferably, the first selection device 302 in the base station 3 combines the uplink communication link L4 with the uplink communication link L6, and considers the uplink communication link L8 and the uplink communication link L10, and uplinks. The communication link L3, for comparison, determines a preferred uplink communication path for the mobile terminal 1.

4 is another variation of the above-described fourth embodiment. As shown in FIG. 4, the mobile terminal 1 is within the coverage of the relay station 2a and the base station 3, and the mobile terminal 1 is not within the coverage of the relay station 2b, and the relay station 2b Used to relay signals from the relay station 2a to the base station 3.

The mobile terminal 1, the relay station 2a, the relay station 2b, and the base station 3 are shown in FIG. The downlink communication link of the base station 3 to the mobile terminal 1 is L1", the downlink communication link of the relay station 2a to the mobile terminal 1 is L2", and the downlink communication link of the relay station 2b to the relay station 2a is L5", the base station 3 to the relay station The downlink communication link of 2b is L7", the uplink of mobile terminal 1 to base station 3 The communication link is L3", the uplink communication link of the mobile terminal 1 to the relay station 2a is L4", the uplink communication link of the relay station 2a to the relay station 2b is L6", and the uplink communication link of the relay station 2b to the base station 3 is L8", The downlink communication link from the base station 3 to the relay station 2a is L9", and the uplink communication link from the relay station 2a to the base station 3 is L10".

Specifically, for the case where the base station 3 determines the downlink communication link for the mobile terminal 1, the second determining device 102 of the first auxiliary selecting device 10 included in the mobile terminal 1 first determines the link quality information of the downlink communication link L1" And the link quality information of the downlink communication link L2", and then the first providing means 103 in the first auxiliary selecting means 10 supplies it to the base station 3.

The relay station 2b provides the link quality information of the downlink communication link L5" to the base station 3. The first selection means 302 in the base station 3 sets the link quality information of the downlink communication link L2", the chain of the downlink communication link L5" The road quality information and the link quality information of the downlink communication link L7" are considered together, and the link quality information of the downlink communication link L2" and the link quality information of the downlink communication link L9" are considered together, and the downlink communication link is considered. The link quality information of the path L1, is compared, and a preferred downlink communication path is selected for the mobile terminal 1 based on a predetermined rule.

For the case where the base station 3 determines the uplink communication link for the mobile terminal 1, the relay station 2a determines the link quality information of the uplink communication link L4" and supplies it to the base station 3.

The relay station 2b provides the link shield information of the uplink communication link L6" to the base station 3. The base station 3 transmits the link quality information of the uplink communication link L4", the link quality information of the uplink communication link L6", and the uplink communication. Considering the link quality information of the link L8", considering the link quality information of the uplink communication link L4" and the link quality information of the uplink communication link L10", and the link with the uplink communication link L3" The quality information is compared, and a preferred uplink communication path is selected for the mobile terminal 1 based on predetermined rules.

In each of the above cases, the base station 3 summarizes the link quality information of the links in all the communication paths between the mobile terminal 1 and the own base station 3, and selects the preferred uplink communication path and the downlink communication path from all the paths. In a modified embodiment, after obtaining the link quality information of the link in the communication path between the relay station and the mobile terminal, the relay station may first select a communication path with better quality, and the local communication channel is better. The link quality information of the link is provided to the base station. The base station according to the link quality of the link in the locally preferred communication path Information, and link quality information of links in other paths that may exist, further determine a path for communication between the base station and the mobile terminal. This method of pre-selection by the relay station can effectively reduce the amount of information reported by the relay station to the base station and reduce the computational load of the base station for path selection. Therefore, there are the following variations.

Figure 5 shows that the mobile terminal 1 is within the coverage of the relay stations 2a, 2b and 2d, the signals of the relay stations 2a and 2b are again relayed by the relay station 2c to the base station 3, and the mobile terminal 1 is not in accordance with an embodiment of the present invention. A schematic diagram within the coverage of the relay station 2c and the base station 3. Referring to FIG. ₅ , a detailed description will be given of a scenario in which the relay station selects a local preferred communication path for the mobile terminal and provides the selection result to the base station, and the base station makes the final selection of the preferred communication path.

Preferably, the broadcast control information may further include an address for indicating the start of the BS mapping table, to notify the start address of the mobile terminal IBS mapping table, and an address for indicating the start of the RS mapping table, to notify the mobile terminal 1RS mapping The starting address of the table.

Then, the second transmitting device of the second auxiliary control device included in the relay station 2a first transmits the first coverage identification information to the mobile terminal 1, and secondly, the second transmitting device of the second auxiliary control device included in the relay station 2b transmits The second coverage area identifies the information to the mobile terminal 1. Again, the second one of the second auxiliary control devices included in the relay station 2d transmits the third coverage identification information to the mobile terminal 1.

Subsequently, the fifth receiving device 101 in the mobile terminal 1 receives the slave relay station 2a, respectively. First coverage identification information, second coverage identification information from the relay station 2b, and third coverage identification information from the relay station 2d, and then the second determining means 102 respectively according to the first coverage identification information, the second coverage The range identification information, and the third coverage identification information determine the link shield information of the downlink communication link La, the link quality information of the downlink communication link Lb, and the link quality information of the downlink communication link Le.

Then, the first providing means 103 in the mobile terminal 1 supplies the link quality information of the downlink communication link La and the downlink communication link Lb to the relay station 2c, and supplies the link quality information of the downlink communication link Le to the base station 3. . Specifically, the first providing device 103 of the mobile terminal 1 transmits the determined link quality information of the downlink communication link La to the relay station 2a, and the relay station 2a transmits the link quality information to the relay station 2c; A providing means 103 transmits the link quality information of the determined downlink communication link Lb to the relay station 2b, and the relay station 2b transmits the quality information to the relay station 2c.

Then, the fourth determining device of the second auxiliary selecting device included in the relay station 2c is based on the received link quality information of the downlink communication link La and the downlink communication link Lb, based on a predetermined rule, is the mobile terminal 1 A preferred downlink communication path of the relay station 2c to the mobile terminal 1 is determined.

Preferably, the fourth determining means in the relay station 2c combines the link quality information of the received downlink communication link La with the link quality information of the downlink communication link La of the relay station 2c to the relay station 2a, and will receive The link quality information of the downlink communication link Lb and the link quality information of the downlink communication link Lb of the relay station 2c to the relay station 2b are considered together to determine the preferred downlink of the relay station 2c to the mobile terminal 1 for the mobile terminal 1. Communication path.

Specifically, the predetermined rule may include the magnitude of the signal power, the length of the signal delay, or combine these factors for consideration. Of course, other predetermined rules may be included, which should be understood by those skilled in the art. I will not repeat them here.

Finally, the second providing device of the second auxiliary selecting device included in the relay station 2c transmits the link quality information of the determined relay station 2c to the link in the preferred downlink communication path of the mobile terminal 1 to the base station 3, so as to The first selection means 302 in the base station 3 is based on the link quality information of the link in the preferred downlink communication path of the relay station 2c to the mobile terminal 1 and the link quality information of the received downlink communication link Le. Mobile terminal 1 selects a better downlink Communication path.

b) The relay station 2c selects the locally preferred uplink communication path for the mobile terminal 1. Specifically, first, the mobile terminal 1 transmits an uplink signal to the relay station 2a, the relay station 2b, and the relay station 2d.

Further, the uplink signal may include a ranging signal, or uplink data.

Preferably, when the upper signal is a ranging signal, the mobile terminal 1 transmits the ranging signal to the relay station 2a, the relay station 2b, and the relay station 2d through the universal ranging sub-channel.

Then, after the eighth receiving device of the second auxiliary selecting device included in the relay station 2a detects the uplink signal, the fifth determining device of the second auxiliary selecting device included in the relay station 2a determines the signal size of the uplink signal. The distance between the mobile terminal 1 and the present relay station 2a is estimated to determine link quality information of the uplink communication link Lc of the mobile terminal 1 to the present relay station 2a. Then, the relay station 2a transmits the uplink communication link Lc quality information to the relay station 2c.

After the eighth receiving device of the second auxiliary selecting device included in the relay station 2b monitors the uplink signal, the fifth determining device of the second auxiliary selecting device included in the relay station 2b estimates the mobile according to the signal size of the uplink signal. The distance between the terminal 1 and the present relay station 2b determines the link quality information of the uplink communication link Ld of the mobile terminal 1 to the present relay station 2b. Then, the relay station 2b transmits the link shield amount information of the uplink communication link Ld to the relay station 2c.

After the eighth receiving device included in the second auxiliary selecting device included in the relay station 2d monitors the uplink signal, the fifth determining device included in the second auxiliary selecting device included in the relay station 2d estimates the mobile according to the signal size of the uplink signal. The distance between the terminal 1 and the present relay station 2d determines the link quality information of the uplink communication link Lf of the mobile terminal 1 to the present relay station 2d. Then, the relay station 2b transmits the link quality information of the uplink communication link Lf to the base station 3.

Subsequently, the fourth determining means of the second auxiliary selecting means included in the relay station 2c is based on the received link quality information of the uplink communication link Lc from the relay station 2a and the received uplink communication link Ld from the relay station 2b. The link quality information determines a preferred uplink communication path of the mobile terminal 1 to the relay station 2c for the mobile terminal 1 based on predetermined rules.

Preferably, the fourth determining means in the relay station 2c will receive the received uplink communication link Lc The link quality information and the link quality information of the relay station 2a to the uplink Lc of the relay station 2c are considered together, and the link shield information of the received uplink communication link Ld and the uplink of the relay station 2b to the relay station 2c are considered. The link quality information of Ld, in combination, is considered to determine a preferred uplink communication path of the mobile terminal 1 to the relay station 2c for the mobile terminal 1 based on predetermined rules.

Finally, the second providing device of the second auxiliary selecting device included in the relay station 2c transmits the determined link quality information of the preferred uplink communication link of the mobile terminal 1 to the relay station 2c to the base station 3, so that the base station 3 is facilitated. The mobile terminal 1 is selected for a preferred uplink communication path based on the link quality information of the preferred uplink communication link of the mobile terminal 1 to the relay station 2c and the received link quality information of the uplink communication link Lf.

The above details the case where the base station selects a preferred uplink and downlink communication path for the mobile terminal from one or more communication paths according to a predetermined rule. In the mobile communication system, not only the base station can make a selection, but the mobile terminal can also select a better communication path for itself according to the link quality information of the link in the obtained communication path. This method of selection by the mobile terminal can reduce the computational load of the base station and the relay station for path selection. This case will be described in detail in the following fifth embodiment. Fifth embodiment

Figure 8 is a block diagram showing the structure of various devices in a system in which a mobile terminal selects a preferred downlink communication path for itself according to an embodiment of the present invention. The first auxiliary selecting device 10 includes a fifth receiving device 10A, a second determining device 102, and a first providing device 103. The third auxiliary control device 20 included in the relay station 2 includes a third transmitting device 201. The base station selecting means 30 included in the base station 3 includes a first transmitting means 301.

Specifically, the base station 3 and the relay station 2 first transmit the broadcast control information to the mobile terminal at the same time. End 1, further, the broadcast control information includes a preamble symbol, wherein the preamble symbol is used for synchronization, and when the mobile terminal 1 enters the wireless multi-hop relay network, a reference point is found for the mobile terminal 1.

Then, the base station selection device 30 included in the base station 3, the first transmission device 301, transmits the first coverage identifier information to the mobile terminal 1, where the first coverage identifier information is used to assist the mobile terminal 1 to know whether it is in the Within the coverage of base station 3.

Then, the third sending device 201 of the third auxiliary control device 20 included in the relay station 2 transmits the second coverage identifier information to the mobile terminal 1, wherein the second coverage identifier information is used to assist the mobile terminal 1 to learn. Whether it is within the coverage of relay station 2.

Subsequently, the fifth receiving device 101 of the first auxiliary selecting device 10 included in the mobile terminal 1 receives the first coverage identification information from the base station 3 and the second coverage identification information from the relay station 2, respectively, and then moves The second determining device 102 of the first auxiliary selecting device 10 included in the terminal 1 determines the link quality information and the downlink communication of the downlink communication link L1 according to the first coverage identifier information and the second coverage identifier information, respectively. Link quality information of link L2.

Specifically, the fifth receiving device 101 receives the first coverage identifier information from the base station 3, and the second determining device 102 included in the first auxiliary selecting device 10 included in the mobile terminal 1 is configured according to the received identifier information. The power quality, the delay size, and the like, to determine the link quality information of the downlink communication link L1.

Similarly, after receiving the second coverage identifier information from the relay station 2, the fifth determining apparatus 102, according to the power magnitude of the received identifier information, delay The size and the like determine the link quality information of the downlink communication link L2.

Then, the third determining device of the first auxiliary selecting device 10 included in the mobile terminal 1 is based on the determined link quality information of the downlink communication link L1 and the link quality information of the downlink communication link L2, based on the predetermined The rule determines the preferred downstream communication path for itself.

Preferably, the third determining device in the mobile terminal 1 considers the downlink communication link L2 in combination with the downlink communication link L5, and compares it with the downlink communication link L1, and selects a preferred downlink for itself according to a predetermined rule. Communication path.

Finally, the first providing means 103 in the mobile terminal 1. notifies the base station 3 of the result of the selection for the base station 3 to allocate resources for it.

The above details the case where the mobile terminal can select a preferred downlink communication path for itself based on the communication link information obtained by the mobile terminal. In the wireless multi-hop relay system, the relay station can also select a better downlink communication path and an uplink communication path for the mobile terminal according to the communication link information obtained by the relay station, and reduce the calculation load of the base station for path selection. This case will be described in detail in the sixth embodiment below. Sixth embodiment

Preferably, the broadcast control information may further include, in order to indicate the start of the BS mapping table. The address, to inform the start address of the mobile terminal IBS mapping table, and an address for indicating the start of the RS mapping table to inform the mobile terminal of the start address of the 1RS mapping table.

Further, the first sending device 301 of the base station selecting device 30 included in the base station 3 first transmits the first coverage identifier information to the mobile terminal 1, where the first coverage identifier information is used to assist the mobile terminal 1 to know whether it is in the Within the coverage of base station 3.

Next, the second one of the second auxiliary selection devices included in the relay station 2a transmits the second coverage identification information to the mobile terminal 1, wherein the second coverage identification information is used to assist the mobile terminal 1 to know whether it is in the relay station. Within the coverage of 2a.

Again, the second one of the second auxiliary selection devices 20 included in the relay station 2b transmits the third coverage identification information to the mobile terminal 1, wherein the third coverage identification information is used to assist the mobile terminal 1 to know whether it is in the Within the coverage of the relay station 2b.

Subsequently, the fifth receiving device 101 of the first auxiliary selecting device 10 included in the mobile terminal 1 respectively receives the first coverage identification information from the base station 3, the second coverage identification information from the relay station 2a, and the relay station 2b. The third coverage identifier information, and then the second determining device 102 of the first auxiliary selecting device 10 included in the mobile terminal 1 respectively according to the identifier information, the first coverage identifier information, the second coverage identifier information, and the third overlay. The range identification information determines the link quality information of the downlink communication link L1, the link quality information of the downlink communication link L2', and the link quality information of the downlink communication link L7.

Specifically, after the fifth receiving device 101 receives the first coverage identifier information from the base station 3, the second determining device 102 determines the downlink communication link L1 according to the power size, the delay size, and the like of the received identifier information. , link quality information.

Similarly, after receiving the second coverage identifier information from the relay station 2a, the fifth receiving apparatus 101 determines the link quality of the downlink communication link L2' according to the power size, the delay size, and the like of the received identification information. information.

After receiving the third coverage identifier information from the relay station 2b, the second determining device 102 determines the downlink communication chain according to the power of the received message, the size of the delay, and the like. Link L7' link quality information.

Then, the first providing device 103 of the first auxiliary selecting device 10 included in the mobile terminal 1 will determine the link quality information of the downlink communication link L1, the downlink communication link L2, and the downlink communication link L7. Provided to the relay station 2a.

Further, the first providing means 103 may directly transmit the link quality information of the downlink communication link L7 to the relay station 2a, or may also forward it to the relay station 2a via the relay station 2b.

Finally, the fourth determining means of the second auxiliary selecting means included in the relay station 2a is based on the received link quality information of the downlink communication link L1, the downlink communication link L2, and the downlink communication link L7, based on the predetermined The rule determines a preferred downlink communication path for the mobile terminal 1.

Preferably, the fourth determining means in the relay station 2a combines the link quality information of the received downlink communication link L2 with the link quality information of the downlink L5 of the base station 3 to the relay station 2a, The link quality information of the received downlink communication link L7, and the link shield information of the downlink L9 of the base station 3 to the relay station 2b are considered together, and the downlink communication chain of the received base station 3 to the mobile terminal 1 is considered. The link quality information of the path L1 is compared to determine a preferred downlink communication path for the mobile terminal 1.

Specifically, the predetermined rule may include the magnitude of the received signal power, the length of the signal delay, or combine these factors for consideration. Of course, other predetermined rules may also be included, which should be understood by those skilled in the art. I will not repeat them here. Ii) The relay station 2a selects the uplink communication path for the mobile terminal 1

First, the mobile terminal 1 transmits an uplink signal to the relay station 2a, the relay station 2b, and the base station 3. Further, the uplink signal may include a ranging signal, or uplink data. Preferably, when the uplink signal is a ranging signal, the mobile terminal 1 transmits the ranging signal to the relay station 2 and the base station 3 through the universal ranging subchannel.

Then, after the eighth receiving device included in the second auxiliary selecting device included in the relay station 2a detects the uplink signal, the fifth determining device included in the second auxiliary selecting device included in the relay station 2a estimates the mobile according to the signal size of the uplink signal. The distance between the terminal 1 and the present relay station 2a is determined to determine the eighth receiving device of the second auxiliary selecting device included in the link shield relay station 2b of the uplink communication link L4 of the mobile terminal 1 to the present relay station 2a. After the uplink signal, the fifth determining device of the second auxiliary selecting device included in the relay station 2b estimates the distance between the mobile terminal 1 and the present relay station 2b according to the signal size of the uplink signal to determine the mobile terminal 1 to the present relay station. The link shield information of the uplink communication link L8 of 2b is transmitted to the relay station 2a.

Similarly, after the third receiving device in the base station selecting device 30 included in the base station 3 detects the uplink signal, the first determining device in the base station selecting device 30 included in the base station 3 estimates the mobile terminal according to the signal size of the uplink signal. 1 The distance from the base station 3 to determine the link quality information of the uplink communication link L3 of the mobile terminal 1 to the base station 3.

Subsequently, the fourth determining means of the second auxiliary selecting means included in the relay station 2a determines the uplink of the mobile terminal 1 to the present relay station 2a based on the received link quality information of the uplink communication link L8 from the relay station 2b. The link quality information of the communication link L4, and the obtained link quality information of the uplink communication link L3 of the mobile terminal 1 to the base station 3, based on a predetermined rule, determine the preferred one for the mobile terminal 1 corresponding to the relay station 2a. Uplink communication path.

Preferably, the fourth determining means in the relay station 2a combines the link quality information of the received uplink communication link L8 with the link quality information of the uplink L10 of the relay station 2b to the base station 3, and determines the determined The link quality information of the uplink communication link L4, and the link quality information of the uplink L6 of the present relay station 2a to the base station 3 are considered together, and the uplink communication link of the acquired mobile terminal 1 to the base station 3 is considered. The link quality information of L3 is compared, and a preferred uplink communication path is determined for the mobile terminal 1 based on a predetermined rule. Further, the fourth determining means in the relay station 2a may select the communication path of the uplink control signal and the communication path of the uplink data signal for the mobile terminal 1, respectively.

As a variant embodiment of the above sixth embodiment, after the relay station 2a receives the link quality information from the relay station 2a of the mobile terminal 1 to the downlink communication link L2' of the mobile terminal 1, if the quality reaches a certain standard ( For example, if it is greater than a predetermined threshold, the relay station 2a directly selects the downlink communication link L2 and the downlink communication link L5 as the downlink communication path of the base station 3 to the mobile terminal 1; the relay station 2a measures the mobile terminal 1 to the relay station. After the link quality information of the uplink communication link L4 of 2a, if the quality reaches a certain standard (for example, greater than a predetermined threshold), the relay station 2a directly selects the uplink communication link L4' and the uplink communication link L6'. It is defined as the uplink communication path from the base station 3 to the mobile terminal 1, regardless of the link quality condition of the links in other paths. The present invention has been described with respect to the specific embodiments thereof, and it is understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications and changes within the scope of the appended claims.

Claims

A method for selecting a communication path for a mobile terminal in a base station of a wireless multi-hop relay network, comprising the steps of:

a. acquiring link quality information of a link in one or more communication paths between the base station and the mobile terminal;

b. selecting a preferred communication path for the mobile terminal from the one or more communication paths based on the link quality information of the links in the one or more communication paths that have been acquired.

2. The method according to claim 1, wherein the communication path comprises a downlink communication path, and the step a comprises the following steps:

Transmitting a coverage identifier, where the coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the base station, and is used to assist the mobile terminal to determine a downlink communication link between the base station and the mobile terminal. Link quality information; a2. Receive link quality information from the mobile terminal corresponding to the downlink communication link of the base station to the mobile terminal.

The method according to claim 1 or 2, wherein the communication path comprises a downlink communication path, and the step a further comprises the following steps:

0. Receive link quality information from one or more relay stations corresponding to links in the respective downlink communication paths of the one or more relay stations to the mobile terminal.

The method according to claim 1, wherein the communication path comprises an uplink communication path, and the step a comprises the following steps:

Receiving an uplink signal from the mobile terminal;

A2. Determine, according to the uplink signal, link quality information of the uplink of the mobile terminal to the base station.

The method according to claim 4, wherein the uplink signal comprises a ranging signal or uplink data.

The method according to claim 1 or 4, wherein the communication path comprises an uplink communication path, and the step a further comprises the following steps:

0. Receive link quality information from one or more relay stations corresponding to links in the respective uplink communication paths of the mobile terminal to the one or more relay stations.

A method for assisting in selecting a communication path for a mobile terminal in a mobile terminal of a wireless relay network, wherein the communication path includes a downlink communication path, including the following steps:

1. Receiving coverage identification information from other network devices, where the coverage identification information is used to assist the mobile terminal to know whether it is within the coverage of the other network device, and to assist the mobile terminal to determine Link quality information of a downlink communication link of another network device to the mobile terminal;

And determining, according to the coverage identifier information, link quality information of a downlink communication link of the network device to the mobile terminal;

Among them, the following steps are also included,

Determining, according to the determined link quality information of the link in the one or more downlink communication paths, the downlink communication path related information of the mobile terminal;

Y. The downlink communication path related information determined by the 提供 is provided to the base station to which the mobile terminal belongs.

The method according to claim 7, wherein the downlink communication path related information includes the link quality information of the link in the determined one or more downlink communication paths, and the step Y further includes: The link quality information of the link in the one or more downlink communication paths that have been determined is provided to the base station or the relay station to which the mobile terminal belongs.

The method according to claim 8, wherein the downlink communication path related information further includes coverage identifier information of the network device corresponding to each downlink communication link, and the step Y further includes: The link quality information of the links in the one or more downlink communication paths and the coverage identifier information of the respective corresponding network devices are provided to the base station or the relay station to which the mobile terminal belongs.

The method according to claim 7, wherein the downlink communication path related information includes path information of a preferred downlink communication path, and the step X further includes:

According to the determined link quality information of the link in one or more downlink communication paths, Determining a preferred downlink communication path for the mobile terminal from the one or more downlink communication paths based on a predetermined rule;

The step Y further includes:

The path information of the determined better downlink communication path is provided to the base station or the relay station to which the mobile terminal belongs.

The method according to any one of claims 7 to 10, characterized in that the other network device comprises a base station or a relay station to which the mobile terminal belongs.

12. A method for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, comprising the steps of:

L acquiring link quality information of a link in one or more communication paths between the relay station and the mobile terminal;

Ii. determining the relay communication path related information of the relay station according to the link quality information of the link in the one or more communication paths that have been acquired;

Iii. Providing the determined relay communication path related information of the present relay station to the base station.

The method according to claim 12, wherein the communication path comprises a downlink communication path, and the step i comprises the following steps:

11. The coverage identifier information is sent, where the coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the relay station, and is used to assist the mobile terminal to determine the downlink of the relay station to the mobile terminal. Link quality information of the communication link;

12. Receiving link quality information from the mobile terminal corresponding to a downlink communication link of the relay station to the mobile terminal.

The method according to claim 12 or 13, wherein the communication path comprises a downlink communication path, and the step i further comprises the following steps:

e. receiving link quality information from links of other one or more relay stations corresponding to the one or more relay stations to the respective downlink communication paths of the mobile terminal.

The method according to claim 12, wherein the communication path comprises an uplink communication path, and the step i comprises the following steps: Il, receiving an uplink signal from the mobile terminal;

Ϊ determining, according to the uplink signal, link quality information of an uplink of the mobile terminal to the relay station;

16. The method according to claim 15, wherein the uplink signal comprises a ranging signal or uplink data.

The method according to claim 12 or 15, wherein the communication path comprises an uplink communication path, and the step i further comprises the following steps:

g. receiving link quality information from the other one or more relay stations corresponding to the links in the respective uplink communication paths of the mobile terminal to the one or more relay stations.

The method according to any one of claims 12 to 17, wherein the relay communication path related information of the present relay station includes link quality information of a link in one or more acquired paths, The step iii further includes: providing link quality information of the link in the determined one or more paths to the base station.

The method according to any one of claims 12 to 17, wherein the relay communication path related information of the present relay station includes path information corresponding to a preferred communication path of the relay station, the step Ii also includes:

Determining, according to a predetermined rule, a preferred communication path corresponding to the relay station from the one or more communication paths based on the link quality information of the link in the one or more communication paths that have been acquired;

The step iii further includes:

The determined path information corresponding to the preferred communication path of the present relay station is supplied to the base station.

20. A method for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, wherein the communication path includes a downlink communication path, including the following steps:

A. Send coverage identification information.

A method for selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, comprising the steps of:

S. acquiring a chain of links in one or more communication paths associated with the mobile terminal Road quality information;

T. selecting a preferred communication path for the mobile terminal from the one or more communication paths based on the link quality information of the links in the one or more communication paths that have been acquired.

22. A base station selection apparatus for selecting a communication path for a mobile terminal in a base station of a wireless multi-hop relay network, wherein:

a first acquiring device, configured to acquire link quality information of a link in one or more communication paths between the base station and the mobile terminal;

a first selecting means, configured to select, according to a predetermined rule, the mobile terminal from the one or more communication paths based on the link shield information of the links in the one or more communication paths that have been acquired Communication path.

The base station selection device according to claim 22, wherein the communication path includes a downlink communication path, and the first acquiring device includes:

a first sending device, configured to send a coverage identifier, where the coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the base station, and is used to assist the mobile terminal to determine the base station to the mobile terminal Link quality information of the downlink communication link;

And a first receiving device, configured to receive link quality information from the mobile terminal corresponding to a downlink communication link of the base station to the mobile terminal.

The base station selection device according to claim 22 or 23, wherein the communication path includes a downlink communication path, and the first acquiring device further includes:

And a second receiving device, configured to receive link quality information of a link in each of the downlink communication paths corresponding to the one or more relay stations to the mobile terminal from one or more relay stations.

The base station selection device according to claim 22, wherein the communication path comprises an uplink communication path, and the first acquiring device comprises:

And a third receiving device, configured to receive an uplink signal from the mobile terminal, where the first determining device is configured to determine uplink link shield information of the uplink of the mobile terminal to the base station according to the uplink signal.

The base station selection device according to claim 25, wherein the uplink signal comprises a ranging signal or uplink data.

The base station selection device according to claim 22 or 25, wherein the communication path includes an uplink communication path, and the first acquiring device further includes:

And a fourth receiving device, configured to receive link quality information from one or more relay stations corresponding to the links in the uplink communication paths of the mobile terminal to the one or more relay stations.

A first auxiliary selection device for assisting in selecting a communication path for a mobile terminal in a mobile terminal of a wireless relay network, wherein the communication path includes a downlink communication path, including:

a fifth receiving device, configured to receive coverage identifier information from another network device, where the coverage identifier information is used to assist the mobile terminal to learn whether it is within the coverage of the other network device, and to assist The mobile terminal determines link quality information of the downlink communication link of the other network device to the mobile terminal;

a second determining means, configured to determine link quality information of the downlink communication link of the network device to the mobile terminal based on the coverage identifier information;

Among them, including

a third determining means, configured to determine downlink communication path related information of the mobile terminal according to the determined link quality information of the link in the one or more downlink communication paths;

The first providing device is configured to provide the determined downlink communication path related information to the base station to which the mobile terminal belongs.

The first auxiliary selection device according to claim 28, wherein the downlink communication path related information includes link quality information of a link in one or more downlink communication paths that have been determined, the first The providing device is further configured to provide link quality information of the link in the determined one or more downlink communication paths to the base station or the relay station to which the mobile terminal belongs.

The first auxiliary selection device according to claim 29, wherein the downlink communication path related information further includes coverage identification information of a network device corresponding to each downlink communication link, and the first providing device Also used to determine a piece or The link quality information of the links in the plurality of downlink communication paths and the coverage identifier information of the corresponding network devices are provided to the base station or the relay station to which the mobile terminal belongs.

The first auxiliary selection device according to claim 28, wherein the downlink communication path related information includes path information of a preferred downlink communication path, and the third determining device is further configured to use the determined one or And determining, according to a predetermined rule, a preferred downlink communication path for the mobile terminal from the one or more downlink communication paths, according to a predetermined rule;

The first providing device is further configured to provide the determined path information of the preferred downlink communication path to the base station or the relay station to which the mobile terminal belongs.

The first auxiliary selection device according to any one of claims 28 to 31, wherein the other network device comprises a base station or a relay station to which the mobile terminal belongs.

33. A second auxiliary selection device for assisting in selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, wherein:

a second acquiring device, configured to acquire link quality information of a link in one or more communication paths between the relay station and the mobile terminal;

a fourth determining means, configured to determine, according to the link quality information of the link in the one or more communication paths that have been acquired, the relay communication path related information of the relay station;

And a second providing means, configured to provide the determined relay communication path related information of the present relay station to the base station.

The second auxiliary selection device according to claim 33, wherein the communication path comprises a downlink communication path, and the second obtaining device comprises:

a second sending device, configured to send coverage identifier information, where the coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the relay station, and to assist the mobile terminal to determine the relay station to the location Link quality information of a downlink communication link of the mobile terminal;

And a sixth receiving device, configured to receive link quality information from the mobile terminal corresponding to a downlink communication link of the relay station to the mobile terminal.

35. A second auxiliary selection device according to claim 33 or 34, characterized in that The second communication device further includes: a seventh receiving device, configured to receive, from the other one or more relay stations, the one or more relay stations to the mobile terminal Link quality information of links in each downlink communication path.

The second auxiliary selection device according to claim 33, wherein the communication path comprises an uplink communication path, and the second obtaining device comprises:

An eighth receiving device, configured to receive an uplink signal from the mobile terminal, and a fifth determining device, configured to determine uplink link quality information of the mobile terminal to the relay station according to the uplink signal;

The second auxiliary selection device according to claim 36, wherein the uplink signal comprises a ranging signal or uplink data.

The second auxiliary selection device according to claim 33 or claim 36, wherein the communication path comprises an uplink communication path, and the second obtaining device further comprises: a ninth receiving device, configured to receive from another one Link quality information of the links of the plurality of relay stations corresponding to the uplink communication paths of the mobile terminal to the one or more relay stations.

The second auxiliary selection device according to any one of claims 33 to 38, wherein the relay communication path related information of the present relay station includes a chain of links in one or more paths that have been acquired. The second quality providing device is further configured to provide link quality information of the link in the determined one or more paths to the base station.

The second auxiliary selection device according to any one of claims 33 to 38, wherein the relay communication path related information of the present relay station includes path information corresponding to a preferred communication path of the present relay station. The fourth determining device is further configured to determine, according to a predetermined rule, the mobile terminal from the one or more communication paths according to the link quality information of the link in the one or more communication paths that have been acquired. a preferred communication path of the relay station;

The second providing means is further configured to provide the determined path information corresponding to the preferred communication path of the relay station to the base station.

41. A relay station in a wireless multi-hop relay network for assisting a mobile terminal Selecting a third auxiliary selection device of the communication path, where the communication path includes a downlink communication path, including:

The third sending device is configured to send coverage identifier information.

42. A relay station selection device for selecting a communication path for a mobile terminal in a relay station of a wireless multi-hop relay network, wherein:

a third acquiring device, configured to acquire path quality information of one or more communication paths related to the mobile terminal;

And a second selecting means, configured to select a preferred communication path for the mobile terminal from the one or more communication paths based on the path quality information of the one or more communication paths that have been acquired.

43. A method for selecting a communication path for a mobile terminal in a wireless multi-hop relay network, wherein the communication path comprises a downlink communication path, comprising the steps of:

Gl. The base station and the relay station simultaneously transmit broadcast control information to the mobile terminal, wherein the broadcast control information includes a preamble symbol.

G2. The base station sends the first coverage identifier information, and the relay station sends the second coverage identifier information, where the first coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the base station, and is used for The auxiliary mobile terminal determines the link quality information of the downlink communication link of the base station to the mobile terminal, where the second coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the relay station, and Determining, by the auxiliary mobile terminal, link quality information of a downlink communication link of the relay station to the mobile terminal;

G3. The mobile terminal determines, according to the first coverage identifier information, first link quality information of the downlink communication link of the base station to the mobile terminal, and the mobile terminal determines, according to the second coverage identifier information, Determining second link quality information of the downlink communication link of the relay station to the mobile terminal;

G4. The mobile terminal provides the first link quality information and the second link quality information to the base station, respectively.

G5. The base station according to the received first link quality information and the second link quality information And selecting a preferred downlink communication path for the mobile terminal according to a predetermined rule.

44. The method according to claim 43, wherein the step g2 further comprises the following steps:

G21. The base station sends the first coverage identifier information, where the first coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the base station, and is used to assist the mobile terminal to determine the base station to the mobile Link quality information of the downlink communication link of the terminal;

G22. The relay station sends the second coverage identifier information, where the second coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the relay station, and is used to assist the mobile terminal to determine the relay station to the mobile terminal. Link quality information of the downlink communication link,

The first coverage identifier information and the second coverage identifier information are sent by using different time-frequency resources.

The method according to claim 43, wherein the step g2 further includes the following steps: the base station and the relay station simultaneously send the first coverage identifier information and the second coverage identifier information to the mobile terminal, where The first coverage identifier information is used to assist the mobile terminal to learn whether it is within the coverage of the base station, and is used to assist the mobile terminal in determining link quality information of the downlink communication link of the base station to the mobile terminal, where The second coverage identifier information is used to assist the mobile terminal to know whether it is within the coverage of the relay station, and is used for assisting the mobile terminal to determine link quality information of the downlink communication link of the relay station to the mobile terminal, where The first coverage identifier information and the second coverage identifier information are sent by using different codes.

The method according to any one of claims 43 to 45, wherein the first coverage identifier information includes identifier information for identifying the base station, and the second coverage identifier information includes For identifying the identity information of the relay station.

47. A method for selecting a communication path for a mobile terminal in a wireless multi-hop relay network, wherein the communication path comprises an uplink communication path, comprising the steps of:

G1. The mobile terminal sends an uplink signal to the relay station and the base station, where the uplink signal The number includes a ranging signal or uplink data;

G2. The relay station and the base station simultaneously receive the uplink signal from the mobile terminal;

G3. The relay station determines first link quality information of the uplink communication link of the mobile terminal to the relay station according to the received uplink signal, and sends the first link quality information to the base station, and the base station determines the mobile according to the received uplink signal. Second link quality information of the uplink of the terminal to the base station;

G4. The base station selects a preferred uplink communication path for the mobile terminal based on the received first link quality information from the relay station and the determined second link quality information based on a predetermined rule.

The method according to claim 47, wherein the uplink signal comprises a ranging signal, and the step G1 further comprises: the mobile terminal transmitting the ranging signal to the relay station and the base station through the universal ranging subchannel.

The method according to any one of claims 42 to 48, wherein the uplink communication path and the downlink communication path are the same communication path, or the uplink communication path and the downlink communication path are Different communication paths.

The method according to claim 49, wherein the uplink communication path comprises an uplink control signal communication path and an uplink data signal communication path, and the downlink communication path comprises a downlink control signal communication path and a downlink data signal communication path. The uplink control signal communication path and the uplink data signal communication path are the same communication path, or are different communication paths, and the downlink control signal communication path and the downlink data signal communication path are the same communication path, or For different communication paths.