CN101291167A - Bi-mode relay station, network access method, mode switching method and control station thereof - Google Patents
Bi-mode relay station, network access method, mode switching method and control station thereof Download PDFInfo
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- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
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Abstract
The invention discloses a double-mode relay station and a network access method, a mode conversion method and a control station thereof. While the double-mode relay station accesses the network, whether to access the network with a terminal mode is determined through negotiating with the control station thereof, if the terminal mode is selected for accessing the network, relay functions of the double-mode relay station can be started according to demands of business and the network after accessing, converting to a relay station operation mode. Both the double-mode relay station and the control station can request to start the relay functions of the double-mode relay station. In the mode conversion process, firstly, the relay station and a base station negotiate to start the relay functions of the double-mode relay station and negotiate a suitable path for starting the relay station; secondly, the double-mode relay station determines whether to set an operation mode of the double-mode relay station to be the relay station mode according to the negotiated results. The double-mode relay station and the network access method, the mode conversion method and the control station thereof realize flexible control to the relay station operation mode, especially having advantages in applications of non-fixed relay communication systems such as nomadic relay communication systems, mobile relay communication systems and so on.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a dual-mode relay station, a network access method, a mode conversion method and a control station thereof.
Background
In a wireless communication system, due to path attenuation of electromagnetic waves, particularly electromagnetic waves using high-frequency carriers, during transmission, and due to shielding of buildings from electromagnetic wave transmission, the coverage of a Base Station (BS) is limited, so that the wireless communication signal strength in some areas is low, and the communication quality of a Mobile Station (MS) as a terminal located in these areas will be poor. Therefore, in order to solve the problem of small coverage of the base Station due to electromagnetic wave attenuation, research is being conducted to introduce a Relay Station (RS) in the wireless communication system to Relay a wireless communication signal between the base Station and the terminal and compensate for the attenuation of the signal.
In a wireless communication system adopting a relay technology, data information or signaling information is forwarded between a base station and a terminal through a relay station, so that the coverage of the base station is expanded to a certain extent. In order to further expand the coverage of the base station, a technology for implementing multi-hop relay by cascading a plurality of relay stations appears, so that the base station obtains a larger coverage.
The relay station is first widely used in various broadband wireless access systems. In recent years, Broadband Wireless Access (BWA) technology has become a hot spot for communication market development in recent years by virtue of its unique advantages in terms of initial investment, service carrying and service speed providing, and broad market application prospects. The Worldwide Interoperability for Microwave Access (WiMAX) system based on the IEEE 802.16 protocol is one of the broadband wireless Access technologies with the greatest international impact. The industry then enhanced the physical layer and Media Access Control (MAC) layer of IEEE 802.16e 2005 Orthogonal Frequency Division Multiplexing Access (OFDMA) systems to support relay station operation, specify the features, functions, and interoperability of the relay station, but did not change the terminal specifications to enhance the coverage, throughput, and/or system capacity of the 802.16 system, resulting in the 802.16j protocol.
In the currently widely applied non-relay broadband access network 802.16e protocol, a mechanism for accessing a wireless terminal is defined. As shown in fig. 1, in the 802.16e system, an access network is composed of two parts, i.e., a wireless terminal and a base station. In the process of accessing the network of the wireless terminal, the terminal firstly searches a downlink prefix signal sent by a base station, selects the base station with good signal quality to carry out downlink synchronization and uplink synchronization, then the wireless terminal sends an uplink RANGING (RANGING) code, and the base station sends a downlink response message RNG-RSP to adjust the sending power and time-frequency offset of the wireless terminal after receiving the RANGING code sent by the terminal. And then, the wireless terminal sends an RNG-REQ message to report information such as a Medium Access Control (MAC) version and the like, and the base station sends an RNG-RSP message to configure the identity of the wireless terminal. And then the wireless terminal and the base station carry out the steps of capability negotiation, authentication, registration and the like, and the network access process of the wireless terminal is completed.
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 processes of relay station network access and starting functions need to be defined.
In the prior art, a method for a relay station to access a network exists, where the front end of the relay station to access the network has the same procedure as the terminal access process, but in the negotiation process between the relay station and the base station, the relay station informs the base station that the relay station has relay capability, and after the registration process of the relay station is completed, the relay station and the base station immediately perform path negotiation, relay station parameter configuration, and route establishment, thereby completing the complete relay station access and function configuration processes.
The relay station has different application scenarios such as fixed, nomadic, mobile and the like, and the owner of the relay station can be an operator or a user. For a relay station belonging to an operator, its main role is to act as a relay. And the nomadic relay station, the mobile relay station or the relay station belonging to the user does not need to be always started. For example, a relay station is temporarily placed near a window of an office as needed, and provides relay service for other user terminals in the office, which can not only save battery consumption of other user terminals, but also provide higher throughput for the users.
In the prior art, there is no relay station that can flexibly start and stop a relay function as required at any time, and similarly, there is no network access method for the corresponding relay station, and the prior network technology has no capability of flexibly controlling a working mode of the relay station.
Disclosure of Invention
The embodiment of the invention provides a dual-mode relay station, a network access method, a mode conversion method and a control station thereof, which are used for solving the problem that the relay station cannot be flexibly controlled in a working mode in the prior art.
A dual mode relay station, comprising: a mode negotiation and control unit, a terminal unit and a relay station unit;
the mode negotiation and control unit is used for carrying out work mode negotiation with the control station and determining that the work mode is a terminal mode or a relay station mode; respectively controlling the terminal unit or the relay station unit according to the negotiation result of the working mode;
the terminal unit is used for realizing the wireless terminal function in the terminal mode according to the control of the mode negotiation and control unit;
and the relay station unit is used for realizing the function of the relay station in the relay station mode according to the control of the mode negotiation and control unit.
A control station, comprising: the device comprises a working mode negotiation unit and a working mode configuration unit;
the working mode negotiation unit is used for negotiating with a dual-mode relay station with a wireless terminal function and a relay station function, determining that the working mode of the dual-mode relay station is a terminal mode or a relay station mode, and notifying the working mode configuration unit;
and the working mode configuration unit is used for receiving the terminal working mode notification sent by the working mode negotiation unit, performing message interaction with the dual-mode relay station, and configuring a terminal mode or a relay station mode of the dual-mode relay station.
A network access method of a dual-mode relay station, wherein the dual-mode relay station has a wireless terminal function and a relay station function, the method comprises the following steps:
the dual-mode relay station initiates a network access request to the control station and negotiates the working mode of the dual-mode relay station;
if the negotiation result is that the dual-mode relay station accesses the network in a terminal mode, the control station configures the working mode of the dual-mode relay station into the terminal mode;
and if the negotiation result is that the dual-mode relay station accesses the network in the relay station mode, the control station configures the working mode of the dual-mode relay station into the relay station mode.
A method for converting an operating mode of a dual mode relay station, the dual mode relay station having a wireless terminal function and a relay station function, the method comprising:
the dual-mode relay station sends a work mode conversion request to a network side control station; or the control station sends a work mode conversion request to the dual-mode relay station;
the dual-mode relay station and the control station perform working mode conversion negotiation;
when the negotiation result is that the working mode is switched, the control station configures the switched working mode and informs the dual-mode relay station of switching the working mode;
the dual-mode relay station converts the working mode of the dual-mode relay station from the current terminal mode to the relay station mode or from the current relay station mode to the terminal mode.
The embodiment of the invention provides a dual-mode relay station with a terminal and relay dual mode, which can flexibly switch working modes according to requirements, aiming at a wireless relay system. The dual-mode relay station negotiates with a control station thereof to access the network in a terminal mode or a relay station mode when accessing the network, if the dual-mode relay station selects to access the network as the terminal mode, when the control station or the terminal starts a relay function according to service and network requirements, a network side control station or the dual-mode relay station initiates a path selection and relay function starting process, and the dual-mode relay station is switched to a proper path to be converted into the relay station mode to work. The embodiment of the invention realizes flexible control of the working mode of the relay station, flexible networking and solves the problem that the relay station has no flexible working mode control capability in the prior art, and has great application advantages especially in non-fixed relay communication systems using nomadic relay stations or mobile relay stations and the like.
Drawings
Fig. 1 is a schematic diagram of a terminal network access process in the prior art;
fig. 2 is a schematic diagram of a networking structure of a dual-mode relay station according to an embodiment of the present invention;
fig. 3 is a functional structure diagram of a dual-mode relay station according to an embodiment of the present invention;
fig. 4 is a functional structure diagram of a control station according to an embodiment of the present invention;
fig. 5 is a functional structure diagram of a control station according to a preferred embodiment of the present invention;
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 flow chart of a dual mode relay mode switching process provided by an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating a dual-mode relay station network access and mode switching process according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a dual-mode relay station network access and mode switching process according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a network access and mode switching process of a triple-mode relay station according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention realizes the flexible selection of starting the relay function of the dual-mode relay station according to the requirement and realizes the remote control and path selection scheme of the working state of the dual-mode relay station by introducing the dual-mode relay station with the dual working modes of the terminal and the relay station and the network side control station corresponding to the dual working modes into the wireless communication system. The dual-mode relay station provided by the embodiment of the invention negotiates with a control station thereof to determine whether to access the network in a terminal mode when accessing the network, and if the dual-mode relay station is selected as the terminal mode, the relay function of the dual-mode relay station can be started according to the service and the network requirement after accessing the network, and the dual-mode relay station is converted into the relay station mode to work. Both the dual-mode relay station and the control station may initiate a relay function start request to start the dual-mode relay station. Firstly, the dual-mode relay station and the base station negotiate to start the relay function and negotiate to determine a proper access path. And then the dual-mode relay station determines whether to switch to the determined access path according to the negotiation result, and converts the working mode of the dual-mode relay station into a relay mode.
The wireless network referred by the embodiment of the invention is defined by protocol standards such as IEEE 802.16, IEEE 802.16e, IEEE 802.16j and the like, and can also be any other wireless network applied to a wireless relay station. Correspondingly, in the embodiment of the present invention, all the interactive messages between the dual-mode relay station and the control station, the interactive messages between the control station and other stations, the interactive messages between the dual-mode relay station and other stations, and the messages generated by the control station may have different implementation forms according to different wireless network systems.
The main implementation principle, the specific implementation mode and the corresponding beneficial effects of the technical scheme of the invention are explained in detail in the following with the help of various drawings.
As shown in fig. 2, which is a schematic diagram of a networking structure of a dual-mode relay station provided in the embodiment of the present invention, a relay station RS1 and a relay station RS2 access a base station MR-BS supporting relaying, a relay station RS3 accesses a relay station RS2, and the MR-BS, the RS2 and the RS3 form a dual-hop relay network. The radio terminal MS1 accesses the relay station RS1, and the radio terminal MS2 accesses the relay station RS 3. The dual-mode relay station RS0 provided by the embodiment of the invention is accessed to the relay station RS 1. Here, the relay stations RS1, RS2, and RS3 may be normal relay stations, or may be control relay stations having a partial base station control function. When the RS1 is a common relay station, the RS0 performs related signaling and data interaction with the base station MR-BS through the RS 1; when the RS1 is a control relay station, the RS0 may complete related interactive messages directly with the RS 1.
In particular, fig. 2 shows only one embodiment of the dual-mode relay station networking structure, and in practical applications, the dual-mode relay station RS0 may directly access the base station MR-BS, and may also access other relay stations or access the base station MR-BS through other relay stations.
Fig. 3 is a functional structure diagram 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, wherein,
the mode negotiation and control unit 10 is configured to perform mode negotiation with a control station during a network access or mode conversion process of the dual-mode relay station, determine that an operating mode is a terminal mode or a relay station mode according to a result of the mode negotiation, and output terminal function on/off information to the terminal unit 20 or output relay station function on/off information 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 of relay parameters and route management, and outputs relay parameter configuration information and route management information to the relay station unit 30.
And a terminal unit 20 for starting/closing the wireless terminal function according to the received terminal function start/close information.
The relay station unit 30 is configured to start/close the relay station function according to the received relay station function start/close information, and complete configuration and routing management of relevant relay parameters according to the received relay parameter configuration information and routing management information during the start of the relay station function.
Correspondingly, an embodiment of the present invention further provides a control station, and as shown in fig. 4, the control station is a functional structure schematic diagram provided in the embodiment of the present invention. The control site includes: an operating mode negotiation unit 40 and an operating mode configuration unit 50, wherein,
a working mode negotiation unit 40, configured to perform mode negotiation with the dual-mode relay station when the dual-mode relay station accesses the network or performs mode conversion, determine that the working mode of the dual-mode relay station is a terminal mode or a relay station mode, and output working mode configuration information to the working mode configuration unit 50;
and an operation mode configuration unit 50, configured to execute a path and/or parameter configuration corresponding to a terminal mode or a relay station mode of the dual-mode relay station according to the operation mode configuration information when the dual-mode relay station accesses a network or changes modes.
Preferably, as shown in fig. 5, a functional structure diagram of a preferred embodiment of the control station provided in the embodiment of the present invention is shown, wherein the control station further includes a path negotiation unit 60, configured to perform path negotiation with the dual-mode relay station when the operating mode of the dual-mode relay station is switched from the terminal mode to the relay station mode, and notify the dual-mode relay station of access path information after the path negotiation.
Based on the above dual-mode relay station and the control station, an 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 network access method for a dual-mode relay station provided in an embodiment of the present invention, wherein,
103, the dual-mode relay station or the control station judges whether to configure the dual-mode relay station into a relay station mode, if so, configures the dual-mode relay station into the relay station mode, and executes step 104; otherwise, step 107 is performed.
And step 104, the control station configures relay station related parameters for the dual-mode relay station.
And 105, configuring relevant routing management information for the dual-mode relay station by the control station.
Based on the above dual-mode relay station and the control station, an embodiment of the present invention provides a mode switching method for a dual-mode relay station, and an implementation method of the embodiment of the present invention is described below by taking an example that a dual-mode relay station shown in fig. 7 is switched from a terminal mode to a relay station mode.
Fig. 7 is a flowchart of a dual-mode relay station mode switching method according to an embodiment of the present invention, wherein,
In particular, the process of scanning for neighboring control stations is initiated by the dual mode relay station or by the control station. The scanning information is reported to the control station through a single message, or is carried in a mode conversion request message/a mode conversion response message sent by the dual-mode relay station.
Particularly, the dual-mode relay station starts the relay mode, which can be initiated by the control station according to the network requirement, or initiated by the dual-mode relay station according to the self setting.
And step 204, negotiating paths and parameters between the control station and the dual-mode relay station, and determining that the relay function of the dual-mode relay station starts an access route. It is determined whether the access route is the current path, that is, it is determined whether the relay function is started in the current path, if yes, step 205 is executed, otherwise, step 209 is executed.
Particularly, if the control station or the relay station receiving the start request message refuses the dual-mode relay station to start the relay function, the control station or the relay station sends a message to the opposite side to indicate that the start of the relay function is refused, and at this moment, the start process of the relay function is finished and the start of the relay function fails.
And step 206, configuring corresponding relay station parameters for the dual-mode relay station by the control station according to the path negotiation result, and sending the parameters to the dual-mode relay station through an independent message. The control station may also carry the path parameter configuration information in the sent relay function start response message. And the dual-mode relay station adjusts the self setting according to the received path configuration parameter information of the control station to complete the preparation of starting the relay function.
And step 207, the control station performs routing management on the dual-mode relay station.
And step 208, the dual-mode relay station starts a relay function.
In 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 direct the dual-mode relay station to serve as other nodes of the network to start the relay function through other paths according to the neighboring cell interference and the network requirement. When the path negotiation result is that the relay function is not started in the current path, it needs to continuously determine whether the dual-mode relay station or the control station starts the relay function in the new path, if so, step 210 is executed, otherwise, step 213 is executed.
In step 210, the control station includes a suggested path, that is, an identifier of a suggested new control station or a superior relay station, in a relay start request message or a response message sent to the dual-mode relay station, that is, access routing information included in a mode negotiation result.
And step 211, the dual-mode relay station switches to a new control station or a superior relay station according to the received identifier of the new control station or the superior relay station.
In particular, the handover may be initiated by the control station or by the dual mode relay station.
In step 213, the dual-mode relay station may decide to abandon the initiation of the relay function or abandon the switching to a new path to initiate the relay function according to the obtained network service and wireless environment information and its own capability.
And step 214, after the dual-mode relay station abandons the starting of the relay function, continuing to access the network in a common terminal mode, and waiting for starting the relay function when appropriate.
Particularly, after the relay function of the dual-mode relay station is enabled, the control station needs to perform routing management and update on each relay station of its subordinate.
Accordingly, the principle and process of the dual-mode relay station converting from the relay station mode to the terminal mode provided by the embodiment of the present invention are similar to the principle and process of the dual-mode relay station converting from the terminal mode to the relay station mode, and are not described herein again.
In the following, a few specific embodiments of the dual-mode relay station in the wireless metropolitan area network defined by the IEEE 802.16j protocol provided in the embodiment of the present invention are taken as examples, and further detailed descriptions are provided for specific embodiments of the technical solution of the present invention and corresponding beneficial effects that can be achieved.
In the first embodiment of the present invention, a dual-mode relay station operating in a terminal mode initiates a relay function start request to apply for conversion into a relay station mode. The sending of the messages such as the measurement report, the proposed path, the handover request, etc. may be initiated by the control station or the dual-mode relay station, and the messages such as the measurement report, the proposed path, the handover request, etc. may have different message implementation forms.
Fig. 8 is a schematic diagram illustrating a network entry and mode switching process of a dual-mode relay station according to a first embodiment of the present invention, wherein,
step 301, the dual-mode relay station RS0 applies for network access, and synchronizes under a control station RS or BS, and particularly, if the wireless network is a multi-hop network structure, various interactive messages between the dual-mode relay station and the control station are forwarded through relay stations of intermediate stages.
The RS0 negotiates with the RS or the BS that the RS0 operates in the terminal mode or the relay station mode. The negotiation process may be performed at the capability negotiation or registration of the RS0 network entry process. If the RS0 negotiates with the RS or BS to select the RS0 to operate first in terminal mode, the relay function may be activated when needed.
Step 302, before RS0 prepares to initiate a relay start request, it sends a scanning request message MOB-SCN-REQ, requesting the control station RS or BS to approve it to perform scanning measurement on the channel quality of each neighboring cell.
Step 303, the control station RS or BS responds to the scan response message MOB-SCN-RSP, and allocates resources for the RS0 to scan and measure the signal quality of each neighboring cell.
Step 304, RS0 sends a relay activation request message REL _ ACTIVATE _ REQ. The request message may include a relay parameter negotiation and a scanning measurement result of the neighboring cell.
Specifically, the scan measurement result of the neighboring cell may also be sent to the control station RS or BS through a scan report message MOB-SCN-REP reported by the RS 0.
Step 305, controlling the path and parameter negotiation between the station RS or BS and the RS 0. If the RS or the BS agrees that the RS0 is reserved at the topological position and agrees to start the relay function, the RS or the BS sends a response message REL _ ACTIVATE _ RSP to the RS0, identifies the corresponding state as accepting the start of the relay function, configures relevant parameters and completes the start of the relay function. The RS or the BS may configure the parameters for the RS0 through an independent configuration message, or may carry the relevant configuration parameters through a relay initiation function response message.
If the RS or the BS rejects the RS0 to start the relay function, the corresponding status is identified as rejection of the relay function start in the response message REL _ ACTIVATE _ RSP sent to the RS 0.
If the RS or BS considers that the RS0 is suitable to work as a relay station in another topological location, the corresponding state is identified as a handover in the REL _ ACTIVATE _ RSP message and a proposed relay initiation path is given, i.e. an identification of a proposed new BS or RS.
Step 306, after receiving the response message REL _ ACTIVATE _ RSP, the RS0 starts or stops starting the relay mode according to the corresponding status flag therein. The RS0 may also decide to forego the relay function based on the obtained network traffic and radio environment information and its own capabilities.
In particular, if the RS or BS indicates RS0 to handover in the reply message REL _ ACTIVATE _ RSP, the TS0 may send a MOB-MSHO-REQ to initiate the handover.
After the RS0 is switched to the new RS or BS, the relay function start application may be sent again, and the new RS or BS configures the corresponding parameters for the application.
Specifically, after the relay function is enabled, the control station RS or BS performs routing management and update on each relay station under its own.
In the second embodiment of the present invention, the control station determines to start the relay function of a dual-mode relay station operating in a terminal mode according to the network condition, and the control station initiates a relay function start request. The message sending of the measurement report, the proposed path, the handover request and the like can be initiated by the control station or the dual-mode relay station, and the measurement report, the proposed path, the handover request and the like can have different message implementation forms.
Fig. 9 is a schematic diagram of a dual-mode relay station network entry and mode switching process in the second embodiment of the present invention. Wherein,
step 401, the dual-mode relay station RS0 applies for network access, and synchronizes under a control station RS or BS, and particularly, if the wireless network is a multi-hop network structure, various interactive messages between the dual-mode relay station and the control station are forwarded through relay stations of intermediate stages.
The RS0 negotiates with the RS or the BS that the RS0 operates in the terminal mode or the relay station mode. The negotiation process may be performed at the capability negotiation or registration of the RS0 network entry process. If the RS0 negotiates with the RS or BS to select the RS0 to operate first in terminal mode, the relay function may be activated when needed.
Step 402, the RS or BS sends a scanning request message MOB-SCN-REQ, and resources are allocated to the RS0 to measure the signal quality of each adjacent cell.
In step 403, the RS0 reports the measurement result of the channel quality of the neighboring cell through the scan report message MOB-SCN-REP.
Step 404, the RS or the BS transmits a relay activation request message REL _ ACTIVATE _ REQ. The request message may have associated configured relay parameters.
Path and parameter negotiation is carried out between the RS or the BS and the RS 0. The RS or BS does not have the proposed path for the relay function to start in the start request message if the RS0 is agreed to remain in this topological location to start the relay function.
If the RS or BS thinks that the RS0 is suitable for operating as a relay station in another topological location, the proposed path, i.e. the identity of the proposed RS or BS, is carried in a relay initiation application message REL _ ACTIVATE _ REQ sent to the RS 0.
Step 405, RS0 sends a response message REL _ ACTIVATE _ RSP, where the status identifier of the corresponding status identifier is to accept the start, which indicates that the relay start is accepted, and completes configuration parameters, thereby completing the relay function start.
In particular, the RS0 may also indicate in the reply REL ACTIVATE RSP message that the relay function is to be aborted.
In step 406, if the RS0 agrees to start the relay function, the RS or BS may transmit the MOB-BSHO-REQ to the RS0 to cause handover as a terminal mode. After the RS0 is switched to the new RS or BS, the new RS or BS may send a relay function start application again, and configure relevant relay parameters for the RS 0.
Accordingly, after the RS0 relay function is activated, the RS or BS performs routing management and update on each relay station under the RS or BS.
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 started according to the service and the network requirement, and the dual-mode relay station is set to the relay station mode. And then the dual-mode relay station and the control station perform path negotiation again, and the dual-mode relay station determines whether to switch to a new path according to the path negotiation result. The path negotiation and switching are completed by the dual-mode relay station in the relay station mode.
Fig. 10 is a schematic diagram of a dual-mode relay station network entry and mode switching process in the third embodiment of the present invention. Wherein,
step 501, the dual-mode relay station RS0 applies for network access, and synchronizes under a control station RS or BS, and particularly, if the wireless network is a multi-hop network structure, various interactive messages between the dual-mode relay station and the control station are forwarded through relay stations of intermediate stages.
The RS0 negotiates with the RS or the BS that the RS0 operates in the terminal mode or the relay station mode. The negotiation process may be performed at the capability negotiation or registration of the RS0 network entry process. If the RS0 negotiates with the RS or BS to select the RS0 to operate first in terminal mode, the relay function may be activated when needed.
Step 502, the RS0 or the control RS or the BS initiates a relay function start request, and performs path parameter negotiation, and the relay station path and function parameters are decided by the RS or the BS. Here, the relay function request message REL _ ACTIVATE _ REQ is transmitted by the RS or the BS.
Step 503, RS0 sends a response message REL _ ACTIVATE _ RSP, and the status identifier of the corresponding status identifier is to accept the start, which indicates that the relay start is accepted, and completes the configuration parameters, and completes the relay function start.
In particular, the RS0 may also indicate in the reply REL ACTIVATE RSP message that the relay function is to be aborted.
Step 504, RS or BS initiates path negotiation with RS 0. Since the location where the RS0 is initially accessed is not necessarily the optimal node as a relay, the RS or BS may initiate a procedure to direct the RS0 to switch to other nodes of the network depending on the neighbor interference and the network needs.
Step 505, the process of scanning for neighboring RSs or BSs is initiated by the RS0, or the process of scanning for neighboring RSs or BSs is initiated by the RS or BS. RS0 scans the neighboring RS or BS channel environment and measures the signal quality of each cell.
In step 506, the RS0 reports the scan measurement result of the neighboring cell to the RS or BS through a message.
In step 507, the RS or BS decides the RS0 to start a suitable path for the relay function, and sends the suggested path to the RS0 through a message.
Step 508, if the path negotiation result requires RS0 to switch to a new RS or BS, the RS or BS may send a handover request, or RS0 may initiate a handover request to update the path.
Accordingly, after the RS0 updates the path, the RS or BS performs route management and update for each relay station under its own.
Preferably, the foregoing embodiments are only a few implementations of the dual-mode relay station provided in the embodiments of the present invention in the wireless metropolitan area network defined by the 802.16j protocol. The dual-mode relay station, the network access method and the mode conversion method thereof provided by the embodiment of the invention can be applied to any application environment of the wireless relay station and can have various application schemes and application methods.
In summary, the embodiments of the present invention provide a dual-mode relay station having dual working modes of a terminal and a relay for a wireless relay system, so as to implement flexible control of a relay station working mode and flexible networking, and solve the problem in the prior art that there is no flexible working mode control capability for the relay station, and particularly have great application advantages in using a nomadic relay station or a mobile relay station and other non-fixed relay communication systems.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (14)
1. A dual mode relay station, comprising: a mode negotiation and control unit, a terminal unit and a relay station unit;
the mode negotiation and control unit is used for carrying out work mode negotiation with the control station and determining that the work mode is a terminal mode or a relay station mode; respectively controlling the terminal unit or the relay station unit according to the negotiation result of the working mode;
the terminal unit is used for realizing the wireless terminal function in the terminal mode according to the control of the mode negotiation and control unit;
and the relay station unit is used for realizing the function of the relay station in the relay station mode according to the control of the mode negotiation and control unit.
2. The dual-mode relay station of claim 1, wherein the control station is a control base station or a control relay station.
3. A control station, comprising: the device comprises a working mode negotiation unit and a working mode configuration unit;
the working mode negotiation unit is used for negotiating with a dual-mode relay station with a wireless terminal function and a relay station function, determining that the working mode of the dual-mode relay station is a terminal mode or a relay station mode, and notifying the working mode configuration unit;
and the working mode configuration unit is used for receiving the terminal working mode notification sent by the working mode negotiation unit, performing message interaction with the dual-mode relay station, and configuring a terminal mode or a relay station mode of the dual-mode relay station.
4. The control station of claim 3, further comprising:
and the path negotiation unit is used for carrying out path negotiation with the dual-mode relay station when the working mode of the dual-mode relay station is converted from the terminal mode to the relay station mode, and notifying the access path information after the path negotiation to the dual-mode relay station.
5. A network access method of a dual-mode relay station is characterized in that the dual-mode relay station has a wireless terminal function and a relay station function, and the method comprises the following steps:
the dual-mode relay station initiates a network access request to the control station and negotiates the working mode of the dual-mode relay station;
if the negotiation result is that the dual-mode relay station accesses the network in a terminal mode, the control station configures the working mode of the dual-mode relay station into the terminal mode;
and if the negotiation result is that the dual-mode relay station accesses the network in the relay station mode, the control station configures the working mode of the dual-mode relay station into the relay station mode.
6. The method of claim 5, wherein the network entry request initiated by the dual mode relay station to the control station comprises: the dual-mode relay station has the information of the relay capability level and the relay performance parameter;
the operation mode of the negotiation dual-mode relay station comprises the following steps: and the control station negotiates with the dual-mode relay station in a working mode according to the relay capability level and the relay performance parameter information of the dual-mode relay station.
7. The method of claim 6, wherein the negotiation of the operating mode with the dual mode relay station is performed during a procedure of the dual mode relay station for network entry registration; or
And the registration is carried out before the network access registration of the dual-mode relay station.
8. The method of claim 5, wherein the dual mode relay station accesses the control station through one or more normal relay stations.
9. A method for converting the working mode of a dual-mode relay station, wherein the dual-mode relay station has a wireless terminal function and a relay station function, the method comprises:
the dual-mode relay station sends a working mode conversion request to a control station; or the control station sends a work mode conversion request to the dual-mode relay station;
the dual-mode relay station and the control station perform working mode conversion negotiation;
when the negotiation result is that the working mode is switched, the control station configures the switched working mode and informs the dual-mode relay station of switching the working mode;
the dual-mode relay station converts the working mode of the dual-mode relay station from the current terminal mode to the relay station mode or from the current relay station mode to the terminal mode.
10. The method of claim 9, wherein when the operation mode switch request transmitted by the dual mode relay station or the control station is a request for switching from a terminal mode to a relay station mode, the performing operation mode switch negotiation further comprises: the control station and the dual-mode relay station carry out path negotiation;
the control station informs the dual-mode relay station of switching the working modes, and the method further comprises the following steps: notifying the dual-mode relay station of the access path information after the path negotiation;
and when the dual-mode relay station is switched from the current terminal mode to the relay station mode, the switching to the relay station mode is completed under the access path.
11. The method of claim 9, wherein when the operation mode switch request transmitted by the dual mode relay station or the control station is a request for switching from a terminal mode to a relay station mode, the performing operation mode switch negotiation further comprises: the control station and the dual-mode relay station carry out path negotiation and judge whether an access path after the path negotiation is the same as the current path of the dual-mode relay station or not;
when the access path after the path negotiation is different from the current path of the dual-mode relay station, the control station informs the dual-mode relay station of performing working mode conversion, and the method further comprises the following steps: notifying the dual-mode relay station of the access path information after the path negotiation;
and when the dual-mode relay station is switched from the current terminal mode to the relay station mode, the switching to the relay station mode is completed under the access path.
12. The method according to claim 10 or 11, wherein the notifying the dual-mode relay station of the access path information after the path negotiation specifically includes:
sending the control station to the dual-mode relay station through an independent message; or
And after receiving the working mode conversion request initiated by the dual-mode relay station, the control station starts response message carrying through the returned relay function.
13. The method of claim 11, wherein before the dual mode relay station switches from the current terminal mode to the relay station mode, further comprising: and the dual-mode relay station switches to the notified access path.
14. The method of claim 13, wherein the handover of the dual mode relay station to the access path is initiated by the dual mode relay station or the handover is initiated by the control station.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200710098246 CN101291167B (en) | 2007-04-20 | 2007-04-20 | Bi-mode relay station, network access method, mode switching method and control station thereof |
| PCT/CN2008/070696 WO2008128460A1 (en) | 2007-04-20 | 2008-04-10 | A dual-mode relay station and network access method, mode conversion method and control site thereof |
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| CN 200710098246 CN101291167B (en) | 2007-04-20 | 2007-04-20 | Bi-mode relay station, network access method, mode switching method and control station thereof |
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| WO2010048836A1 (en) * | 2008-10-31 | 2010-05-06 | 中兴通讯股份有限公司 | Method and base station for switching between half-duplex and multicast cooperating relay modes |
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| WO2011103719A1 (en) * | 2010-02-26 | 2011-09-01 | Nokia Corporation | Base station aided mobile-relay candidate pre-selection and pre-deployment |
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| CN102984708B (en) * | 2011-09-07 | 2017-09-26 | 中兴通讯股份有限公司 | The method for pre-configuration and system of a kind of back haul link |
| CN103428835A (en) * | 2013-08-30 | 2013-12-04 | 西安电子科技大学 | Method for dynamically opening and closing site relay function in wireless local area network |
| CN110557185A (en) * | 2018-05-31 | 2019-12-10 | 成都鼎桥通信技术有限公司 | method and device for determining operation mode of relay equipment |
| CN110557185B (en) * | 2018-05-31 | 2022-08-19 | 成都鼎桥通信技术有限公司 | Method and device for determining operation mode of relay equipment |
| WO2023284513A1 (en) * | 2021-07-16 | 2023-01-19 | 大唐移动通信设备有限公司 | Relay state management method and apparatus, and terminal |
| WO2023016258A1 (en) * | 2021-08-10 | 2023-02-16 | 大唐移动通信设备有限公司 | Terminal access method and apparatus, terminal, and storage medium |
| CN118555636A (en) * | 2024-07-30 | 2024-08-27 | 北京智芯半导体科技有限公司 | Communication method, device and system of dual-mode communication repeater |
Also Published As
| Publication number | Publication date |
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| CN101291167B (en) | 2013-02-27 |
| WO2008128460A1 (en) | 2008-10-30 |
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