WO2008128460A1

WO2008128460A1 - A dual-mode relay station and network access method, mode conversion method and control site thereof

Info

Publication number: WO2008128460A1
Application number: PCT/CN2008/070696
Authority: WO
Inventors: Jingning Zhu; Zheng Shang; Jiang Li
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-04-20
Filing date: 2008-04-10
Publication date: 2008-10-30
Also published as: CN101291167B; CN101291167A

Abstract

A dual-mode relay station and a network access method, a mode conversion method and a control station thereof are provided. When it is accessing a network, the dual-mode relay station negotiates with its control station to determine whether accessing the network in a terminal mode, if it is selected that accessing the network at a terminal mode, after it accesses the network, a relay function of the dual-mode relay station can be activated based on service and network demand, and it is converted to be the relay mode and works. The dual-mode relay station and the control station both can initiate a request for activating the relay function of the dual-mode station. In the mode conversion process, firstly, the relay station and the base station negotiate to active the relay function of the dual-mode relay station, and negotiate a suitable path for activating the relay station. Then, the dual-mode relay station determines whether setting the work mode of the dual-mode relay station to the relay mode based on the negotiation result. The technical proposal realizes a flexible control of the relay station work mode, and there is dominance in the utilization of the non-fixed relay communication system, for example, nomadism and mobile, especially.

Description

Dual-mode relay station and its network access method, mode conversion method and control station The application is submitted to the Chinese Patent Office on April 20, 2007, and the application number is 200710098246. 7. The invention name is "a dual-mode relay station and its network access" The priority of the method, the mode conversion method and the control site of the Chinese Patent Application, the entire contents of which are hereby incorporated by reference. Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a dual mode relay station, a network access method thereof, a mode conversion method, and a control station. Background technique

In a wireless communication system, the base station is limited due to electromagnetic wave, particularly path attenuation caused by electromagnetic waves using a high-frequency carrier during transmission, and occlusion of electromagnetic waves by buildings.

The coverage of (Base Station, BS) makes the wireless communication signal strength of some areas low, and the communication quality of the mobile station (MS) as the terminal located in these areas becomes very poor. Therefore, in order to solve the problem of small coverage of the base station caused by electromagnetic wave attenuation, the industry began to study the introduction of a relay station (RS) in the wireless communication system to relay the wireless communication signal between the base station and the terminal, and compensate the attenuation of the signal. .

In a wireless communication system employing a relay technology, data information or signaling information is forwarded between a base station and a terminal through a relay station, which expands the coverage of the base station to a certain extent. In order to further expand the coverage of the base station, a technology of cascading multiple relay stations to implement multi-hop relay has emerged, so that the base station obtains a larger coverage.

Relay stations are first widely used in various types of broadband wireless access systems. In recent years, Broadband Wireless Access (BWA) technology has its unique advantages in initial investment, service carrying and service speed, and broad market application prospects. It is a hot spot for the development of the communication market in recent years. The Worldwide Interoperability for Microwave Access (WiMAX) system based on the IEEE 802.16 protocol is one of the most influential broadband wireless access technologies in the world. The industry subsequently enhanced the physical layer and Media Access Control (MAC) layer of the IEEE 802.16e 2005 Orthogonal Frequency Division Multiplexing Access (OFDMA) system to support relay station operation. The 802.16j protocol is generated by specifying the characteristics, functions, and interoperability of the relay, but without changing the terminal specifications to enhance the coverage, throughput, and/or system capacity of the 802.16 system.

In the 802.16e protocol, which is widely used in the non-relay broadband access network, a mechanism for accessing a wireless terminal is defined. As shown in Figure 1, in the 802.16e system, the access network consists of two parts: a wireless terminal and a base station. In the process of the wireless terminal accessing the network, the terminal first searches for the downlink prefix signal sent by the base station, selects the base station with good signal quality to perform downlink synchronization and uplink synchronization, and then, the wireless terminal sends an uplink ranging (RANGING) code, and the base station transmits the received terminal. After the RANGING code, the downlink response message RNG-RSP is sent to adjust the transmission power and time-frequency offset of the wireless terminal. Then, the wireless terminal sends an RNG-REQ message to report its Medium Access Control (MAC) version and other information, and the base station sends an RNG-RSP message to configure the identity of the wireless terminal. Then, the wireless terminal and the base station perform capability negotiation, authentication, registration, and the like to complete the wireless terminal accessing process.

For a complex wireless communication system with a relay station, the original wireless terminal network access process cannot complete the relay station network access process, and the process of defining the relay station network access and startup functions needs to be defined.

In the prior art, there is a method for a relay station to access a network. The front end step of the relay station entering the network is the same as the terminal access network procedure. However, in the process of negotiating the relay station and the base station capability, the relay station informs the base station that it has the relay capability, after completing the relay station registration process. The relay station and the base station immediately perform path negotiation, relay station parameter configuration, and route establishment process, thereby completing a complete relay station network access and function configuration process.

The relay station has different application scenarios such as fixed, nomadic, mobile, etc., and the owner of the relay station can It is an operator or a user. For a relay station whose ownership belongs to the operator, its main function is to act as a relay. For nomadic, mobile relay stations or relay stations belonging to the user, it is not necessary to always enable the relay function. For example, a relay station is temporarily placed near the window of the office as needed, and the relay station provides relay service for other user terminals in the office, which can save battery consumption of other user terminals, and may also provide higher throughput for these users. .

In the prior art, there is no relay station capable of flexibly starting and terminating the relay function as needed. Similarly, there is no network access method for the corresponding relay station, and the existing network technology does not have the ability to perform flexible working mode control on the relay station. Summary of the invention

The embodiments of the present invention provide a dual-mode relay station, a network access method, a mode conversion method, and a control station, which are used to solve the problem that the flexible working mode control of the relay station cannot be performed in the prior art.

A dual mode relay station includes: a mode negotiation and control unit, a terminal unit, and a relay station unit;

The mode negotiation and control unit is configured to perform an operation mode negotiation with the control station, determine that the working mode is a terminal mode or a relay station mode, and control the terminal unit or the relay station unit according to the working mode negotiation result;

The terminal unit is configured to implement a wireless terminal function in a terminal mode according to the mode negotiation and control unit control;

The relay station unit is configured to implement a relay station function in a relay station mode according to the mode negotiation and control unit control.

A control station, comprising: a working mode negotiation unit and an operating mode configuration unit; the working mode negotiating unit is configured to negotiate with a dual mode relay station having a wireless terminal function and a relay station function, and determine that the working mode of the dual mode relay station is a terminal mode or a relay mode, and notifying the working mode configuration unit; The working mode configuration unit is configured to receive a terminal working mode notification sent by the working mode negotiating unit, perform message interaction with the dual mode relay station, and configure a terminal mode or a relay station mode of the dual mode relay station.

A dual mode relay station network access method, the dual mode relay station has a wireless terminal function and a relay station function, and the method includes:

The dual-mode relay station initiates a network access request to the control station to negotiate the working mode of the dual-mode relay station; if the negotiation result is that the dual-mode relay station enters the network in the terminal mode, the control station configures the working mode of the dual-mode relay station as the terminal mode;

If the result of the negotiation is that the dual mode relay station enters the network in the relay mode, the control station configures the working mode of the dual mode relay station as the relay mode.

A dual mode relay station working mode conversion method, the dual mode relay station has a wireless terminal function and a relay station function, and the method includes:

The dual mode relay station sends a working mode transition request to the network side control station; or the control station sends a working mode transition request to the dual mode relay station;

The dual mode relay station and the control station perform work mode conversion negotiation;

When the negotiation result is that the working mode is changed, the control station configures the converted working mode, and notifies the dual-mode relay station to perform the working mode conversion;

The dual mode relay station converts its operating mode from the current terminal mode to the relay mode, or from the current relay mode to the terminal mode.

The embodiment of the present invention provides a dual-mode relay station with a dual mode of terminal and relay, which can flexibly switch the working mode according to requirements. When the dual-mode relay station enters the network and negotiates with its control station to enter the network in the terminal mode or the relay mode, if the dual-mode relay station selects to enter the network as the terminal mode first, when the control station or the terminal starts the relay function according to the service and the network, the network side The control station or the dual-mode relay station initiates the path selection and relay function startup process, and the dual-mode relay station switches to the appropriate path to convert to the relay mode mode. The embodiment of the invention realizes flexible control of the working mode of the relay station, and the flexible networking solves the problem in the prior art. There is a problem of flexible working mode control capability for the relay station, especially in non-fixed relay communication systems such as nomadic relay stations or mobile relay stations. DRAWINGS

1 is a schematic diagram of a terminal network access process in the prior art;

2 is a schematic structural diagram of a dual-mode relay station according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a dual-mode relay station according to an embodiment of the present invention;

4 is a schematic structural diagram of a function of a control station according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a preferred embodiment of a control station according to an embodiment of the present invention; FIG.

FIG. 6 is a flowchart of a network access process of a dual mode relay station according to an embodiment of the present invention;

FIG. 7 is a flowchart of a mode conversion process of a dual mode relay station according to an embodiment of the present invention;

8 is a schematic diagram of a process of network switching and mode switching of a dual mode relay station according to an embodiment of the present invention; FIG. 9 is a schematic diagram of a process of network switching and mode switching of a dual mode relay station according to an embodiment of the present invention; FIG. 10 is a schematic diagram of a network and mode of a dual mode relay station according to an embodiment of the present invention; Schematic diagram of the conversion process. detailed description

The embodiment of the present invention introduces a dual-mode relay station having a dual working mode of a terminal and a relay station and a network-side control station corresponding thereto in the wireless communication system, thereby flexibly selecting a dual-mode relay station relay function according to requirements, and implementing a dual-mode relay station. Remote control and path selection scheme for working status. The dual-mode relay station provided in the embodiment of the present invention negotiates with its control station to determine whether to enter the network in the terminal mode. If the network is selected as the terminal mode, after the network is connected, the relay function of the dual-mode relay station can be started according to the service and network requirements. , converted to relay mode mode work. Both the dual mode relay station and the control station can initiate a relay function start request to start the dual mode relay station. First, the dual-mode relay station and the base station negotiate to start the relay function, and negotiate to determine an appropriate access path. The dual mode relay station then determines whether to switch to the determined access path according to the negotiation result. The working mode of the dual mode relay station is converted into a relay mode.

The wireless network referred to in the embodiment of the present invention is a wireless network defined by a protocol standard such as IEEE 802.16, IEEE 802.16e, or IEEE 802.16j, and may be any other wireless network applied by a wireless relay station. Correspondingly, the interaction message of all the dual-mode relay stations and the control station in the embodiment of the present invention, the interaction message between the control station and other stations, the interaction message between the dual-mode relay station and other stations, and the control station itself may be Different wireless network systems have different implementations.

The specific embodiments and advantageous effects of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 2, a schematic diagram of a networking structure of a dual mode relay station according to an embodiment of the present invention, wherein a relay station RS1 and a relay station RS2 access a base station MR-BS supporting a relay, and a relay station RS3 access a relay station RS2, MR- BS, RS2 and RS3 together form a two-hop relay network. The wireless terminal MS1 accesses the relay station RS1, and the wireless terminal MS2 accesses the relay station RS3. The dual mode relay station RS0 provided by the embodiment of the present invention accesses the relay station RS1. Here, the relay stations RS1, RS2, and RS3 may be ordinary relay stations or control relay stations having partial base station control functions. When RS1 is a normal relay station, RS0 performs related signaling and data interaction with the base station MR-BS through RS1; when RS1 is a control relay station, RS0 can directly complete the related interactive message with RS1.

In particular, FIG. 2 shows only one embodiment of a dual-mode relay station networking structure. In practical applications, the dual-mode relay station RS0 can directly access the base station MR-BS, or can access other relay stations or access the base station through other relay stations. MR-BS.

3 is a schematic diagram showing the functional structure of a dual mode relay station according to an embodiment of the present invention. As shown in FIG. 3, the dual mode relay station includes a mode negotiation and control unit 10, a terminal unit 20, and a relay station unit 30, where

The mode negotiation and control unit 10 is configured to perform mode negotiation with the control station during the network access or mode transition of the dual mode relay station, and determine the working mode as the terminal mode according to the result of the mode negotiation. Or the relay station mode, the terminal function activation/deactivation information is output to the terminal unit 20, or the relay station function activation/deactivation information is output to the relay station unit 30. In the process of starting the relay station function, the mode negotiation and control unit 10 also performs configuration and routing management of the relay parameters, and outputs the relay parameter configuration information and the route management information to the relay station unit 30.

The terminal unit 20 is configured to enable/disable the wireless terminal function according to the received terminal function start/stop information.

The relay station unit 30 is configured to start/close the relay station function according to the received relay station function start/stop information, and complete the relevant relay parameter according to the received relay parameter configuration information and the route management information during the startup of the relay station function. Configuration and routing management.

Correspondingly, the embodiment of the present invention further provides a control station, as shown in FIG. 4, which is a schematic structural diagram of a control station provided by an embodiment of the present invention. The control site includes: a working mode negotiation unit 40 and a working mode configuration unit 50, wherein

The working mode negotiation unit 40 is configured to perform mode negotiation with the dual mode relay station when the dual mode relay station enters the network or mode transition, determine that the working mode of the dual mode relay station is the terminal mode or the relay mode, and output the working mode to the working mode configuration unit 50. Configuration information;

The working mode configuration unit 50 is configured to perform terminal mode or relay station mode corresponding path and/or parameter configuration for the dual mode relay station according to the working mode configuration information when the dual mode relay station enters the network or mode transition.

Preferably, as shown in FIG. 5, a functional structure diagram of a preferred embodiment of a control station according to an embodiment of the present invention, wherein the control station further includes a path negotiation unit 60 for dual mode When the working mode of the relay station is changed from the terminal mode to the relay mode, the path negotiation is performed with the dual mode relay station, and the access path information after the path negotiation is notified to the dual mode relay station.

Based on the dual-mode relay station and the control station, the embodiment of the present invention provides a network access method for a dual-mode relay station, as shown in FIG. 6 , which is a flowchart of a method for accessing a dual-mode relay station according to an embodiment of the present invention, where Step 101: The dual mode relay station applies to join a wireless network and synchronizes under the corresponding control station. In particular, if the wireless network has a multi-hop network structure, various types of messages exchanged between the dual-mode relay station and the control station are forwarded through the relay stations at the intermediate levels.

Step 102: The dual-mode relay station negotiates its working mode with the control station, and determines that the dual-mode relay station works in the terminal mode or the relay mode. In particular, the process of negotiating the working mode can also be performed during the registration of the dual mode relay station.

Step 103: The dual mode relay station or the control station determines whether the dual mode relay station is configured as the relay station mode. If yes, configure the dual mode relay station to the relay station mode, and perform step 104; otherwise, execute step 107.

Step 104: The control station configures a relay station related parameter for the dual mode relay station.

Step 105: The control station configures related routing management information for the dual mode relay station.

Step 106: The dual-mode relay station starts the relay function, and waits for the terminal function to be activated when necessary. At this time, the dual-mode relay station works in the relay mode and works in the same way as the normal relay station.

Step 107: The control station configures the dual-mode relay station to the terminal mode, and waits for the relay function to be activated when necessary. At this time, the dual-mode relay station works in the terminal mode and works in the same way as the ordinary terminal.

Based on the dual mode relay station and the control station, the embodiment of the present invention provides a mode conversion method of the dual mode relay station. The following is an example of the dual mode relay station shown in FIG. Implementation method.

FIG. 7 is a flow chart of a dual mode relay station mode conversion method according to an embodiment of the present invention, where

Step 201: After the dual mode relay station joins a wireless network in the terminal mode, the dual mode relay station operates in the normal terminal mode and waits to start the relay mode.

Step 202: Before the dual-mode relay station starts the relay function, the channel environment of the neighboring station needs to be scanned, and the signal quality of each cell is measured, and the scan information is reported to the control station through the message, thereby helping the control station to determine the optimal startup mode of the relay mode. path. In particular, the process of scanning adjacent control stations is initiated by a dual mode relay station or initiated by a control station. The scan information is carried by a separate message reporting control station or in a mode conversion request message/mode conversion response message sent by the dual mode relay station.

Step 203: The dual mode relay station or the control control station initiates a relay function start request. The relay function initiation request initiated by the dual-mode relay station may include information of the relay capability level and the relay performance parameter that it has.

In particular, the dual-mode relay station initiates the relay mode, which can be initiated by the control station according to the network needs, or can be initiated by the dual-mode relay station according to its own settings.

Step 204: Perform path and parameter negotiation between the control station and the dual-mode relay station, and determine that the relay function of the dual-mode relay station starts the access route. It is determined whether the access route is the current path, that is, whether the relay function is started on the current path. If yes, go to step 205; otherwise, go to step 209.

Step 205: If the dual-mode relay station or the control station agrees to start the relay function on the current path of the dual-mode relay station, the user agrees to initiate the relay function information interaction, and the response agrees to start the relay function.

In particular, if the control station or the relay station that receives the start request message rejects the dual mode relay station to initiate the relay function, it sends a message to the other party indicating that the relay function is disabled, and the relay function startup process ends, and the relay function fails to start. .

Step 206: The control station configures the corresponding relay station parameter for the dual-mode relay station according to the path negotiation result, and sends the parameter to the dual-mode relay station through an independent message. The control station may also carry path parameter configuration information in the transmitted relay function start response message. The dual-mode relay station adjusts its own settings according to the path configuration parameter information of the received control station, and completes the preparation of the relay function.

Step 207: The control station performs route management on the dual mode relay station.

Step 208: The dual mode relay station starts the relay function.

Step 209: Since the path of the dual-mode relay station initially accessing the network is not necessarily the optimal path as the relay station, the control station may guide the dual-mode relay station as another node of the network to initiate the relay function through other paths according to the neighboring area interference and the network requirement. When the result of the path negotiation is not present When the path starts the relay function, it is necessary to continue to determine whether the dual-mode relay station or the control station starts the relay function on the new path. If yes, go to step 210, otherwise go to step 213.

Step 210: The control station includes the suggested path in the relay initiation request message or the response message sent to the dual mode relay station, that is, the identifier of the proposed new control station or the upper relay station, that is, the access route included in the mode negotiation result. information.

Step 211: The dual mode relay station switches to a new control station or an upper relay station according to the identifier of the new control station or the superior relay station.

In particular, the handover can be initiated by the control station or by a dual mode relay.

Step 212: After the dual mode relay station is switched to the new control station or the upper relay station, the new control station or the dual mode relay station may initiate the start relay function, and then go to step 206 to configure the relay station parameters for the dual mode relay station.

Step 213: The dual-mode relay station may decide to abandon the startup relay function or abandon the handover to the new path to start the relay function according to the obtained network service and the wireless environment information and its own capability.

dagger.

Step 214: After the dual-mode relay station abandons the startup relay function, it continues to access the network in the normal terminal mode, and waits for the relay function to be activated when appropriate.

In particular, after the relay function of the dual-mode relay station is enabled, the control and control station needs to perform route management and update for each of the lower-level relay stations.

Correspondingly, the principle and process of converting the relay mode to the terminal mode of the dual mode relay station provided by the embodiment of the present invention are similar to the principle and process of converting the terminal mode to the relay mode, and details are not described herein.

The following is a specific implementation of the dual-mode relay station in the wireless metropolitan area network defined by the IEEE 802.16j protocol provided by the embodiment of the present invention, and further details the specific implementation manner of the technical solution of the present invention and the corresponding beneficial effects thereof. Elaboration.

In the first embodiment of the present invention, a dual function relay station working in the terminal mode initiates a relay function start request, and the application is converted into a relay station mode. Information such as measurement report, suggested path, switching request, etc. The transmission can be initiated by the control station or the dual-mode relay station, measurement reports, suggested paths, handover requests, etc. - the chord can be different;

FIG. 8 is a schematic diagram of a process of entering a network and a mode transition of a dual mode relay station according to Embodiment 1 of the present invention, where

Step 301: The dual-mode relay station RS0 applies for accessing the network, and is synchronized under a control station RS or BS. In particular, if the wireless network has a multi-hop network structure, various types of messages exchanged between the dual-mode relay station and the control station pass through each of the messages. Level relay station forwarding.

RS0 negotiates with RS or BS. RS0 works in terminal mode or relay mode. This negotiation process can be performed during the negotiation or registration of the RS0 network access process. If RS0 negotiates with RS or BS to select RS0 to work in terminal mode first, the trunk function can be activated when needed.

Step 302: Before the RS0 is ready to initiate the relay initiation request, send a scan request message MOB-SCN-REQ, requesting the control station RS or BS to agree to scan the channel quality of the adjacent cells.

Step 303: The control station RS or the BS responds to the scan response message MOB-SCN-RSP, allocates resources for RS0 to scan and measure the signal quality of neighboring cells.

Step 304: RS0 sends a relay start request message REL_ACTIVATE_REQ. The request message may be accompanied by a relay parameter negotiation or a scan measurement result of a neighboring cell.

In particular, the scan measurement result of the neighboring cell can also be sent to the control station RS or BS through the scan report message MOB-SCN-REP reported by RS0.

Step 305: Control the station RS or BS and RS0 to perform path and parameter negotiation. If the RS or BS agrees that RS0 is reserved in this topology and agrees to start the relay function, it sends a response message REL_ACTIVATE_RSP to RS0, identifies the corresponding status as accepting the relay function, and configures related parameters to complete the relay function. . The RS or BS can configure parameters for RS0 through independent configuration messages, or can carry related configuration parameters through the relay initiation function response message.

If the RS or BS rejects the RS0 start relay function, the response message is sent to RS0.

In REL_ACTIVATE_RSP, the corresponding status is identified as the deny relay function startup. If the RS or the BS considers that the RSO is suitable to operate as a relay station in another topology location, the corresponding status is identified as a handover in the REL_ACTIVATE_RSP message and a suggested relay initiation path is given, ie the proposed new BS or RS identity. .

Step 306: After receiving the response message REL_ACTIVATE_RSP, RS0 starts or stops the startup relay mode according to the corresponding status identifier. RS0 can also decide to abandon the start relay function based on the obtained network service and wireless environment information and its own capabilities.

In particular, if the RS or BS instructs RS0 to switch in the response message REL_ACTIVATE_RSP, TS0 may send a MOB-MSHO-REQ to initiate the handover.

After RS0 is switched to the new RS or BS, the relay function start request can be sent again, and the new RS or BS configures the corresponding parameters for it.

In particular, after the relay function is enabled, the control station RS or BS performs route management and update for each of the lower relay stations.

In the second embodiment of the present invention, the control station determines the relay function of the dual mode relay station operating in the terminal mode according to the network condition, and the control station initiates the relay function start request. The measurement of the 4 report, the suggested path, the handover request, etc. can be initiated by the control station or the dual mode relay station, and the measurement report, the suggested path, the handover request, etc. can have different message implementation forms.

As shown in FIG. 9, FIG. 9 is a schematic diagram of a process of entering a network and a mode transition of a dual mode relay station according to Embodiment 2 of the present invention. among them,

Step 401: The dual-mode relay station RS0 applies for accessing the network, and is synchronized under a control station RS or BS. In particular, if the wireless network has a multi-hop network structure, various types of messages exchanged between the dual-mode relay station and the control station pass through each of the messages. Level relay station forwarding.

Step 402: The RS or the BS sends a scan request message MOB-SCN-REQ, and allocates resources for RS0. The signal quality of adjacent cells is measured.

Step 403: The RS0 reports the measurement result of the channel quality of the neighboring cell by using the scan report message MOB-SCN-REP.

Step 404: The RS or BS sends a relay start request message REL_ACTIVATE_REQ. The request message can have a relay parameter with the relevant configuration.

Route and parameter negotiation between RS or BS and RS0. If the RS or BS agrees that RS0 reserves the ability to activate the trunk function at this topology, the recommended path for the trunk function is not initiated in the start request message.

If the RS or the BS considers that RS0 is suitable to operate as a relay station in another topology, the proposed route, that is, the identifier of the proposed RS or BS, is carried in the relay initiation request message REL_ACTIVATE_REQ sent to RS0.

Step 405: RS0 sends a response message REL_ACTIVATE_RSP, and the status identifier of the corresponding status identifier is accepted to start, indicating that the relay is started, and the configuration parameters are completed, and the relay function is started.

In particular, RS0 can also indicate that the trunking function is abandoned in the REL_ACTIVATE_RSP message.

Step 406: If RS0 agrees to start the relay function, the RS or BS may send the MOB-BSHO-REQ to RS0 to switch as the terminal mode. After RS0 is switched to the new RS or BS, the new RS or BS can send the relay function start request again and configure the relevant relay parameters for RS0.

Correspondingly, after the RS0 trunk function is enabled, the RS or BS performs route management and update for each of the lower relay stations.

In the third embodiment of the present invention, after the dual-mode relay station first enters the network as the terminal mode, the relay function is activated according to the service and network requirements, and is set to the relay station mode. After that, the dual-mode relay station and the control station perform path negotiation again, and the dual-mode relay station decides whether to switch to the new path according to the result of the path negotiation. The dual mode relay station is completed in the relay mode when the path is negotiated and switched.

As shown in FIG. 10, it is a schematic diagram of a network access mode and a mode switching process of a dual mode relay station according to Embodiment 3 of the present invention. among them, Step 501: The dual-mode relay station RSO applies for accessing the network, and is synchronized under a control station RS or BS. In particular, if the wireless network has a multi-hop network structure, various types of messages exchanged between the dual-mode relay station and the control station pass through each of the messages. Level relay station forwarding.

Step 502: The relay function start request is initiated by the RS0 or the control RS or the BS, and the path parameter negotiation is performed, and the relay station path and the function parameter are determined by the RS or the BS. Here, the relay function request message REL_ACTIVATE_REQ is sent by the RS or BS.

Step 503: RS0 sends a response message REL_ACTIVATE_RSP, and the status identifier of the corresponding status identifier is accepted to start, indicating that the relay is started, and the configuration parameters are completed, and the relay function is started.

In particular, RS0 can also indicate to abort the start relay function in the REL_ACTIVATE_RSP message of the response.

Step 504, RS or BS and RS0 start path negotiation. Since the location where RS0 is initially accessed is not necessarily the optimal node for the relay station, the RS or BS can initiate the process of guiding RS0 to other nodes of the network according to neighbor interference and network needs.

Step 505: A process of scanning a neighboring RS or BS by RS0, or a process of scanning an adjacent RS or BS by an RS or a BS. RS0 scans the adjacent RS or BS channel environment and measures the signal quality of each cell.

Step 506: The RS0 reports the scan measurement result of the neighboring cell to the RS or the BS by using a message. Step 507: The RS or the BS determines that the RS0 initiates a suitable path of the relay function, and sends the recommended path to the RS0 through the message.

Step 508: If the path negotiation result requires RS0 to switch to a new RS or BS, the handover request may be sent by the RS or the BS, or the handover request may be initiated by the RS0, and the path is updated.

Correspondingly, after RS0 updates the path, the RS or BS performs route management on each of the lower relay stations. Update.

Preferably, the foregoing specific embodiments are only a few implementations of the dual mode relay station provided by the embodiment of the present invention in the wireless metropolitan area network defined by the 802.16j protocol. The dual mode relay station and its network access method and mode conversion method provided by the embodiments of the present invention can be applied to an application environment of any wireless relay station, and can have various application schemes and application methods.

In summary, the embodiment of the present invention provides a flexible dual-mode relay station with a terminal and a relay dual working mode, and implements a flexible control relay station working mode and a flexible networking, which solves the prior art. There is no problem with the flexible working mode control capability of the relay station, especially in the non-fixed relay communication system using a nomadic relay station or a mobile relay station. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Claim

A dual mode relay station, comprising: a mode negotiation and control unit, a terminal unit, and a relay station unit;

2. The dual mode relay station according to claim 1, wherein the control station is a control base station or a control relay station.

3. A control station, comprising: a working mode negotiation unit and a working mode configuration unit;

The working mode negotiating unit is configured to negotiate with a dual mode relay station having a wireless terminal function and a relay station function, determine that the working mode of the dual mode relay station is a terminal mode or a relay station mode, and notify the working mode configuration unit;

The working mode configuration unit is configured to receive a terminal working mode notification sent by the working mode negotiating unit, perform message interaction with the dual mode relay station, and configure a terminal mode or a relay station mode of the dual mode relay station.

4. The control station of claim 3, further comprising:

a path negotiation unit, configured to perform path negotiation with the dual mode relay station when the working mode of the dual mode relay station is changed from the terminal mode to the relay mode, and notify the dual mode by the path information after the path negotiation checkpoint.

5. A dual mode relay station network access method, characterized in that: the dual mode relay station has a wireless terminal function and a relay station function, and the method comprises: The dual-mode relay station initiates a network access request to the control station to negotiate the working mode of the dual-mode relay station; if the negotiation result is that the dual-mode relay station enters the network in the terminal mode, the control station configures the working mode of the dual-mode relay station as the terminal mode;

The method according to claim 5, wherein the network access request initiated by the dual-mode relay station to the control station comprises: information about a relay capability level and a relay performance parameter that the dual-mode relay station has ;

The working mode of the negotiated dual mode relay station comprises: the control station negotiating with the dual mode relay station according to the information of the relay capability level and the relay performance parameter of the dual mode relay station.

7. The method according to claim 6, wherein the working mode negotiation with the dual mode relay station is performed in a process of registering the dual mode relay station network access; or before the dual mode relay station network registration.

8. The method of claim 5, wherein the dual mode relay station accesses the control station via one or more normal relay stations.

A dual mode relay station working mode conversion method, characterized in that the dual mode relay station has a wireless terminal function and a relay station function, and the method comprises:

The dual mode relay station sends a working mode transition request to the control station; or the control station sends a working mode transition request to the dual mode relay station;

10. The method of claim 9, wherein when the dual mode relay station or control When the working mode conversion request sent by the system is requested to be converted from the terminal mode to the relay mode, the working mode conversion negotiation is performed, and the method further includes: the control station performing path negotiation with the dual mode relay station;

And the controlling station notifying the dual mode relay station to perform the mode switching, further comprising: notifying the path information after the path negotiation to the dual mode relay station;

When the dual mode relay station transitions from the current terminal mode to the relay station mode, the conversion to the relay station mode is completed under the access path.

The method according to claim 9, wherein when the working mode conversion request sent by the dual mode relay station or the control station is to request to switch from the terminal mode to the relay mode, the working mode conversion negotiation is performed. The method includes: the control station performs path negotiation with the dual mode relay station, and determines whether the access path after the path negotiation is the same as the current path of the dual mode relay station; when the access path after the path negotiation is different from the current path of the dual mode relay station And the controlling station notifying the dual mode relay station to perform the mode switching, further comprising: notifying the path information after the path negotiation to the dual mode relay station;

The method according to claim 10 or 11, wherein the notifying the access path information after the path negotiation to the dual mode relay station comprises:

Sending to the dual mode relay station by the control station through an independent message; or

After receiving the working mode conversion request initiated by the dual mode relay station, the control station initiates a response message carrying by the returned relay function.

The method according to claim 11, wherein before the converting from the current terminal mode to the relay mode, the dual mode relay station further comprises: the dual mode relay station switching to the notified access path.

14. The method of claim 13, wherein the dual mode relay station switches to the access path, the handover is initiated by the dual mode relay station or initiated by the control station.