CN101534521A - Apparatus and method for admission control for service flow in broadband wireless access communication system using multi-hop relay scheme - Google Patents
Apparatus and method for admission control for service flow in broadband wireless access communication system using multi-hop relay scheme Download PDFInfo
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Abstract
An apparatus and method for an admission control for a service flow in a broadband wireless access communication system using a multi-hop relay scheme is provided. In a method for operating a relay station in a broadband wireless communication system using a multi-hope relay scheme, a request message requesting an admission control decision for a service flow is received from an upper node. It is determined whether a requested QoS parameter set included in the request message is supportable. If the requested QoS parameter set is supportable, the request message is forwarded to a subordinate relay station corresponding to a next hop in a data transmission path. If the requested QoS parameter set is unsupportable, a response message indicating the unsupportability of the requested QoS parameter set is transmitted to a base station.
Description
Priority
The application requires the rights and interests of the korean patent application that is assigned sequence number 10-2008-0024087 submitted to Korea S Department of Intellectual Property in the korean patent application that is assigned sequence number 10-2008-0022070 submitted to Korea S Department of Intellectual Property on March 10th, 2008 and on March 14th, 2008 according to 35 U.S.C. § 119 (a), merge the whole of the two by reference thus and disclose.
Technical field
The present invention relates to use broadband wireless access (BWA) communication system of multi-hop relay scheme.More specifically, the present invention relates to be used for equipment and the method for the signaling process of relay station (RS) and base station (BS) with admittance (admission) control of execution service flow.
Background technology
Carrying out big quantity research so that various service quality (QoS) feature of the data transfer rate with about 100Mbps to be provided in the 4th generation (4G) communication system.The 4G communication system just is being evolved to provides mobility, High Data Rate to transmit and high QoS in broadband wireless access (BWA) communication system of for example Local Area Network system and metropolitan area network (MAN) system.The example of BWA system comprises the system based on Institute of Electrical and Electric Engineers (IEEE) 802.16d and IEEE 802.16e standard, is called as IEEE802.16d and IEEE 802.16e system thereafter.
IEEE 802.16d and IEEE 802.16e system use OFDM (OFDM)/OFDM (OFDMA) scheme.
Fig. 1 is the block diagram of conventional I EEE 802.16e system.
With reference to figure 1, IEEE 802.16e system has many cell structures.IEEE 802.16e system comprises the BS 110 of sub-district 100, sub-district 150, management sub-district 100, BS 140 and a plurality of mobile radio station (MS) 111,113,130,151 and 153 of management sub-district 150.Use the OFDM/OFDMA scheme carry out BS 110 and 140 and MS111,113,130,151 and 153 between handshaking.The borderline region (that is, Zone switched) of MS 130 between sub-district 100 and 150.When MS 130 moved to the sub-district 150 of BS 140 when communicating by letter with BS 110 from the sub-district 100 of BS 110, the serving BS broadcasts of MS 130 was changed into BS 140 from BS 110.
Because as Fig. 1 is illustrated, carry out the fixedly signaling communication between the BS and MS, so IEEE 802.16e system can provide the reliable Radio Link between BS and the MS by direct link.Yet, because BS fixes, so IEEE 802.16e system has low flexibility when the structure wireless network.Therefore, in IEEE 802.16e system, be difficult in the frequent radio environment that changes of service distribution wherein or call demand effective communication service is provided.
In order to address this problem, can use fixedly RS, mobile RS or general MS, the multi-hop relay data transfer scheme is applied to for example cellular communication system of IEEE 802.16e system.The use of multi hop relay wireless communication system makes and may reconfigure network in response to the change of communication environment fast and more effectively operate whole wireless network.For example, but the multi hop relay wireless communication system Extended Cell area of coverage and increase power system capacity.When the bad channel conditions between BS and the MS, can between BS and MS, RS be installed, to set up multi-hop relay link therebetween, making thus to provide the radio channel with better channel condition to MS.In addition, use the multi-hop relay scheme in having the cell border areas of poor channel conditions, making thus to provide the high data rate channel and the Extended Cell area of coverage.
Fig. 2 is to use the multi-hop relay scheme to expand the block diagram of the traditional B WA communication system of the BS area of coverage.
With reference to figure 2, this multi-hop relay BWA communication system has many cell structures.This multi-hop relay BWA communication system comprises sub-district 200, sub-district 240, the BS 210 of management sub-district 200, the BS 250 of management sub-district 240, be positioned at a plurality of MS 211 and 213 of sub-district 200, be arranged in zone 230 outside the sub-district 200 of BS 210 and a plurality of MS 221 and 223 that communicate by letter with BS 210, the RS 220 of the multi hop relay path between BS 210 and the MS 221 and 223 in zone 230 is provided, be arranged in a plurality of MS 251 of sub-district 240,253 and 255, be arranged in zone 270 outside the sub-district 240 of BS 250 and a plurality of MS 261 and 263 that communicate by letter with BS 250, and the RS 260 that the multi hop relay path between BS 250 and the MS 261 and 263 in zone 270 is provided.Use the OFDM/OFDMA scheme be used for BS 210 and 250, RS 220 and 260 and MS 211,213,221,223,251,253,255,261 and 263 between communication.
Although be arranged in sub-district 200 MS 211 and 213 and RS 220 can with BS 210 direct communications, be arranged in zone 230 MS 221 and 223 can not with BS 210 direct communications.So RS 220 these zones 230 of service are with repeating signal between BS 210 and MS 221 and 223.That is, MS 221 can communicate by letter with BS 210 by RS 220 with 223.In addition, RS 260 can directly communicate by letter with BS 250 with 255 with the MS 251,253 that is arranged in sub-district 240, be arranged in zone 270 MS 261 and 263 can not with BS 250 direct communications.So RS 260 these zones 270 of service are with repeating signal between BS 250 and MS 261 and 263.That is, MS 261 can communicate by letter with BS 250 by RS 260 with 263.
Fig. 3 is to use the multi-hop relay scheme to increase the block diagram of the traditional B WA communication system of power system capacity.
With reference to figure 3, this multi-hop relay BWA communication system comprises BS 310, a plurality of MS 311,313,321,323,331 and 333 and RS 320 and 330 that the multihop path between BS 310 and MS 311,313,321,323,331 and 333 is provided.BS 310, MS 311,313,321,323,331 and 333 and RS 320 and 330 use the OFDM/OFDMA schemes to communicate with one another.BS 310 management sub-districts 300.RS 320 with 330 and sub-district 300 in MS 311,313,321,323,331 directly communicate by letter with 333 with BS 310.
When some MS 321,323,331 and 333 were in the borderline region of sub-district 300, the signal to noise ratio (snr) of the direct link between BS 310 and MS 321,323,331 and 333 can be low.In this case, RS 320 junction traffic between BS 310 and MS 321 and 323.MS 321 and 323 is via RS 320 and BS business transferring.In addition, RS 330 junction traffic between BS 310 and MS 331 and 333.MS 331 and 333 is via RS 330 and BS business transferring.RS 320 and 330 provides the high data rate path to MS321,323,331 and 333, increases the effective transmission rate of MS 321,323,331 and 333 and the capacity of multi-hop relay BWA communication system thus.
In the multi-hop relay BWA communication system of Fig. 2 and 3, one or more among the RS 220,260,320 and 330 can be to be installed and by the substructure RS of BS 210,250 and 310 management, perhaps can be the client computer RS as subscriber station (SS), MS or RS operation by the service provider.In addition, one or more among the RS 220,260,320 and 330 can be fixed RS, nomadic (nomadic) RS (for example, notebook) or have similar ambulant mobile RS to MS.
In multi-hop relay BWA communication system, if when MS directly communicates by letter with BS or communicates by letter with BS by RS, created the new service flow of MS or changed the qos parameter that the current service of MS flows, then BS and RS must be able to support the parameter of new service flow or the new qos parameter that current service flows.
The service flow parameters of MS can be determined by the qos policy server in the network.In order to determine service flow parameters, the qos policy server obtains supported parameter information from BS and RS.Here, supported parameter information is to obtain by the admittance control of corresponding node (that is, BS and RS).
So need a kind of signaling process, by this signaling process, when having created the new service flow of MS or changed the parameter of current service stream of MS in multihop relay system BWA communication system, the corresponding node in the data transfer path of MS can be carried out and admit control.
Summary of the invention
One aspect of the present invention is to solve at least the problems referred to above and/or shortcoming and following at least advantage is provided.Therefore, one aspect of the present invention provides a kind of signaling equipment and method that is used for carrying out in multi-hop relay BWA communication system the admittance control of service flow.
Another aspect of the present invention provides a kind of being used in signaling equipment and the method for multi-hop relay BWA communication system by the admittance control of the service flow of the execution of the node in the data transfer path of MS MS.
According to an aspect of the present invention, provide a kind of method that is used at the wireless communication system operation relay station that uses the multi-hop relay scheme.This method comprises: the request message that receives the acceptance controlling decision of request service flow from a last node, determine whether the qos parameter set of being asked that comprises in this request message is supported, if the qos parameter set of being asked is supported, then this request message is forwarded to data transfer path in next jump corresponding subordinate relay, if and the qos parameter set of being asked can not be supported, what then will indicate the qos parameter set of being asked can not supportive response message be sent to the base station.
According to a further aspect in the invention, provide a kind of acceptance controlling method that is used in the service flow of the wireless communication system that uses the multi-hop relay scheme.This method comprises: if asked the service flow of mobile radio station to change, then the relay station from the data transfer path of base station between base station and mobile radio station transmits the request message of request acceptance controlling decision, relay station is carried out based on the qos parameter set of being asked that comprises in this request message and is admitted control, if with the qos parameter of being asked be supported, then from this relay station to data transfer path next jump corresponding subordinate relay and transmit this request message.
According to a further aspect in the invention, provide a kind of equipment that is used at the relay station of the wireless communication system that uses the multi-hop relay scheme.This equipment comprises: receiver is used for from the request message of the acceptance controlling decision of last node reception request service flow; Controller is used for determining whether the qos parameter set of being asked that this request message comprises is supported; And transmitter, if the qos parameter set that is used for being asked is supported, then this request message is sent to data transfer path in next jump corresponding subordinate relay, if and the qos parameter set that is used for being asked can not support, what then will indicate the qos parameter set of being asked can not supportive response message be sent to the base station.
According to a further aspect in the invention, provide a kind of method that is used in the wireless communication system operation base station of using the multi-hop relay scheme.This method comprises: if asked the service flow of mobile radio station to change, then the relay station in the data transfer path between base station and mobile radio station transmits the request message of request acceptance controlling decision, receive the response message of this request message from relay station, carry out the admittance control of service flow and transmit the message that comprises the service flow of being admitted to mobile radio station based on the information that comprises in this request message.
According to the following detailed description that discloses example embodiment of the present invention in conjunction with the accompanying drawings, it is clear that other aspects of the present invention, advantage and prominent features will become to those skilled in the art.
Description of drawings
According to the following description of carrying out in conjunction with the accompanying drawings, above and other aspect, the feature and advantage of some example embodiment of the present invention will be clearer, wherein:
Fig. 1 is the block diagram of conventional electrical and 802.16e system of Electronic Engineering Association (IEEE);
Fig. 2 is to use the multi-hop relay scheme to come the block diagram of traditional broadband wireless access (BWA) communication system of extended base station (BS) area of coverage;
Fig. 3 is to use the multi-hop relay scheme to increase the block diagram of the traditional B WA communication system of power system capacity;
Fig. 4 is the flow chart of the signal flow of the service flow that illustrates the execution MS in the multi-hop relay BWA communication system of the example embodiment according to the present invention admittance control of adding request;
Fig. 5 is the flow chart that illustrates the admittance control and treatment that the service flow that is used for the tunnel in the multi-hop relay BWA communication system of the example embodiment according to the present invention changes;
Fig. 6 is the flow chart that illustrates the operation of the BS in the multi-hop relay BWA communication system of the example embodiment according to the present invention;
Fig. 7 is the flow chart that illustrates the operation of the relay station (RS) in the multi-hop relay BWA communication system of the example embodiment according to the present invention;
Fig. 8 is the block diagram of the BS (or RS) of the example embodiment according to the present invention; With
Fig. 9 is the flow chart of the signal flow of the service flow that illustrates the execution MS in the multi-hop relay BWA communication system of another example embodiment according to the present invention admittance control of adding request.
It should be noted that in all figure identical Reference numeral is used to describe identical or similar elements, feature and structure all the time.
Embodiment
Provide following description with reference to the accompanying drawings, with the example embodiment of the present invention that helps complete understanding to limit by claim and equivalent thereof.It comprises the various specific detail that help understanding, and is exemplary but these details only will be counted as.Therefore, persons of ordinary skill in the art will recognize that various changes and the modification that to carry out the embodiments described herein, and do not depart from the scope of the present invention and spirit.In addition, for clarity and conciseness, and the description of having omitted known function and structure.
Below term and the word that uses in description and the claim is not limited to literal (bibliographical) meaning, but only used so that can understand and as one man understand the present invention by the inventor.Therefore, should it is evident that to those skilled in the art, provide the following description of example embodiment of the present invention only to be used for illustrative purposes, rather than limit the invention to as claims and purpose that equivalent limited thereof.
It should be understood that singulative " ", " one " and " being somebody's turn to do " comprise that plural number refers to, unless context is otherwise clearly stipulated.Thus, for example, mentioning that " assembly surface " comprises mentions one or more such surfaces.
Example embodiment of the present invention is intended to be provided in multi hop relay broadband wireless access (BWA) communication system base station (BS) of admittance control of the service flow of carrying out MS and the scheme of the signaling process between the relay station (RS).
For example, multi-hop relay BWA communication system is used OFDM (OFDM) scheme or OFDM (OFDMA) scheme.Thus, multi-hop relay BWA communication system can use a plurality of subcarriers to transmit physical channel signal, enables high data rate thus and transmits.In addition, multi-hop relay BWA communication system can provide many cell structures, supports the mobility of MS thus.
In the following description, multi-hop relay BWA communication system as example example embodiment of the present invention is described.Yet the present invention also may be used on using any other cellular communication system of multi-hop relay scheme.
Fig. 4 is the flow chart of the signal flow of the service flow that illustrates the execution MS in the multi-hop relay BWA communication system of the example embodiment according to the present invention admittance control of adding request.
With reference to figure 4, in step 401, MS 460 transmits dynamic Service interpolation-request (DSA-REQ) message to BS 400, so that create the new A of connection.Here, DSA-REQ message can comprise the parameter information (for example, service quality (QoS) parameter set and QoS configuration file (profile) identifier) that is used for service flow.
In step 403, BS 400 transmits the DSA-REQ message that comprising of receiving is used to connect the service flow parameters of A from MS 460 to RS1 440.DSA-REQ message is planned for all RS uses of the data transfer path that is arranged in MS 460, and DSA-REQ message is for the inquiry of whether admitting the service flow parameters that is used to connect A.
In step 405, RS1 440 admits control by using the service flow parameters that comprises in the DSA-REQ message to carry out.That is, RS1 440 determines whether to support the qos parameter set of being asked.Here, suppose to admit service flow parameters.If the admittance service flow parameters, then in step 407, RS1 440 to the data transfer path of MS460 in next jump the corresponding RS2 of subordinate 450 forwarding DSA-REQ message.
In step 409, RS2 450 admits control by using the institute's requested service stream parameter that comprises in the DSA-REQ message to carry out.Here, suppose not admit service flow parameters.If the parameter set of being asked can not be supported, then RS2 450 in step 411 to RS1 440 transmit indicate the qos parameter set of being asked can not supportive dynamic Service add-reply (DSA-RSP) message, and RS1 440 transmits the DSA-RSP message to BS 400 in step 413.DSA-RSP message can comprise indicate the qos parameter set of being asked can not supportive confirmation code and in RS2 450 the acceptable qos parameter set of accepting.Here, the acceptable QoS parameter information can comprise the parameter that can not support in the qos parameter set of being asked and the supported parameter value of parameter among the RS2 450 in RS2 450.
For example, when the minimal service amount of one of parameter in the qos parameter set of being asked of the connection A that comprises in the DSA-REQ message as reception in the step 407 is 50, if RS2 450 can support minimal service amount 30, but then DSA-RSP message can comprise the support parameter value " 30 " that is used for the minimal service amount.
The information that RS from respective path collects can be used for determining whether to support the service flow of corresponding MS.In addition, if service flow can not support that then this information can be used as MS and switches to the trigger point that can support RS or BS, or can be used as the load control information of BS.
In step 415, BS 400 carries out the admittance control that connects A based on the information that comprises in the DSA-RSP message that receives, and according to admitting the control result to determine to connect the parameter of A.Determine although described, can carry out qos parameter by strategic server and determine by the qos parameter of BS 400 execution connection A.Here, the signaling between strategic server and the BS 400 is traditional, and will omit its detailed description for the sake of simplicity thus.The parameter of the connection A that determines in the step 415 can be based on the service flow parameters of proofreading and correct from the information of RS2450 collection, perhaps can be the impossible information that indicates the service that connects A.
Qos parameter (for example, UGS, nrtPS, rtPS and ertPS), permitted maximum (sustained) speed, minimum reserved rate, maximum delay time and the approval of each QoS stream of strategic server definable are at interval.If started new service, then MS transmits session initiation by application layer to map network entity (for example internet protocol multimedia subsystem (IMS) of Core Service Networks (CSM)), and map network entity triggers strategic server.Then, strategic server can transmit the qos parameter set that is used for institute's requested service to MS by application layer, or can transmit the DSA that comprises qos parameter set to corresponding with service BS and trigger.In the former case, MS can transmit the DSA-REQ message that comprises qos parameter set to BS, and under one situation of back, BS can transmit DSA-REQ message to MS, starts signaling thus and consults.Under the situation of multihop system, because the service class difference of each node, so can ask the qos parameter set of this stream to change (in step 415) as mentioned above.In this case, if BS has the permissible range of each parameter of corresponding QoS stream, then BS can proofread and correct the parameter of corresponding with service stream in permissible range.If BS does not have this permissible range, but then BS request strategy server is determined the parameter of corresponding with service stream, and can receive determined service flow parameters from strategic server.
In step 417, BS 400 transmits the DSA-RSP message that comprises determined parameter by RS1 440 and RS2 450 to MS 460.In step 419, MS 460 transmits DSA-in response to DSA-RSP message to BS 400 and really receives (DSA-ACK) message.
In step 421, BS 400 transmits the DSA-ACK message that comprises for connecting the definite service flow parameters of A to RS1 440.In step 423, RS1 440 transmits DSA-ACK message to jumping corresponding RS2 450 with next.That is, the RS on the service path of MS notifies determined service flow parameters.Thereafter, BS 400 provides corresponding with service based on determined service flow parameters to MS 460 with RS 440 and 450.
Although create the processing of having described Fig. 4 under the situation that connects (MS_init DSA) in hypothesis MS request, but also can change the service flow parameters that is connected that request is created with BS under the situation of (MS_init DSC (dynamic Service change)) in the service flow parameters of the connection that the BS request is created under the situation that connects (BS_init DSA), the MS request is created and change under the situation of (BS_init DSC) the admittance control and treatment of execution graph 4.If change the service flow parameters of the connection of being created, then can use DSC-REQ/DSC-RSP/DSC-ACK message, replace DSA-REQ/DSA-RSP/DSA-ACK message.
To for the admittance control and treatment data conditions of using tunnel mode transmission MS under provide description thereafter.That is,, provide description to admitting control and treatment with considering the wherein reformed situation of service flow parameters in the tunnel of establishment between the access node (for example, the terminal RS in the data transfer path of MS) of BS and MS.Here, the situation of the service flow parameters in tunnel change can comprise the situation of wherein having added the new connection of using the tunnel and wherein change the situation of using the service flow parameters value of being created that is connected in tunnel.
Fig. 5 is the flow chart that illustrates the admittance control and treatment that the service flow that is used for the tunnel in the multi-hop relay BWA communication system of the example embodiment according to the present invention changes.
With reference to figure 5, suppose between RS1 540 in BS 500 and the data path and RS2 550, set up tunnel 1, and tunnel 1 to have independent service flow parameters (qos parameter set) at MS for the data transmission of the connection A of MS 560.In step 501, BS 500, RS1 540 use tunnel 1 to transmit the data that are connected A of MS 560 with RS2 550.
If it is necessary that the service flow parameters of the connection A of MS 560 changes, then MS 560 transmits the DSC-REQ message of the change of the service flow parameters value of asking connection A to BS 500 in step 503.
In step 505, BS 500 carries out based on the information that comprises in the DSC-REQ message and admits control.Here, if by admitting control to determine that the change of the service flow parameters collection in the tunnel 1 is necessary, then BS 500 determines the service flow parameters value that needs in the tunnels 1.
In step 507, BS 500 transmits the DSC-REQ message of the determined service flow parameters value that comprises tunnel 1 to RS1 540.In step 509, RS1 540 admits control based on comprising in the DSC-REQ message that information is carried out.That is, RS1 540 determines whether the qos parameter set of being asked is supported.Here, suppose not admit corresponding with service stream parameter.If do not admit service flow parameters, then in step 511, RS1 540 generate comprise RS1 540 supported qos parameter sets and indicate the qos parameter set of being asked for tunnel 1 can not supportive confirmation code DSC-RSP message, and the DSC-RSP message that generates is sent to BS 500.That is, DSC-RSP message can comprise RS1 540 service flow parameters that can not support and the RS1 540 acceptable service flow parameters values that are used for this parameter.
In step 513, BS 500 determines whether the service flow parameters value in tunnel 1 can be readjusted, or determines whether that the service flow parameters for connection A of refusing MS changes request, because the service flow parameters value in tunnel 1 can not be readjusted.Here, suppose to readjust the service flow parameters value in tunnel 1.If readjusted the service flow parameters value in tunnel 1, then in step 515, BS 500 transmits the DSC-REQ message of the service flow parameters that comprises the tunnel of readjusting 1 to RS1 540.
In step 517, RS1 540 determines whether the service flow parameters in the tunnel 1 readjusted is admissible.Here, suppose to admit the service flow parameters of readjusting.That is, can not support if determine the qos parameter set asked, then in step 519, RS1 540 to the data transfer path of MS in next jump the DSC-REQ message that the corresponding RS2 of subordinate 550 forwardings comprise the qos parameter set of being asked.
In step 521, RS2 550 carries out based on the information that comprises in the DSC-REQ message that receives and admits control.Here, suppose not admit corresponding with service stream parameter.If do not admit service flow parameters, then in step 523, RS2 550 transmits the DSC-RSP message to RS1 540, this message comprise indicate for the qos parameter set of tunnel 1 request can not supportive confirmation code and the RS2 550 acceptable service flow parameters values of the service flow parameters that can not support for RS2 550.In step 525, RS1 540 transmits DSC-RSP message to BS 500.
In step 527, based on the information that comprises the DSC-REQ message that receives from RS2 550, BS 500 determines whether the service flow parameters value in tunnel 1 can be readjusted, or the service flow parameters that determines whether to refuse the connection A of MS changes request, because the service flow parameters value in tunnel 1 can not readjusted.Here, suppose to readjust the service flow parameters value in tunnel 1.
In step 529, BS 500 transmits the DSC-RSP message of the determined qos parameter set that comprises tunnel 1 to MS 560.Here, the determined qos parameter set in tunnel 1 can be based on the information that receives from RS2550 and the service flow parameters of upgrading, or indicates the information of the inadmissibility that the service flow parameters of the connection A of MS 560 requests changes.
In step 531, M S560 transmits DSC-ACK message in response to DSC-RSP message to BS 500.In step 533, the RS1 540 of BS 500 on the service path that is positioned at MS transmits the DSC-ACK message that comprises the parameter of determining for tunnel 1.In step 535, RS1 540 is provided with the information (service flow parameters) that comprises in the DSC-ACK message in correspondence table, and transmits the DSC-ACK message to the RS2 corresponding with next jumping on the service path that is positioned at MS 550.Then, RS2 550 is provided with the information that comprises in the DSC-ACK message in correspondence table.Thereafter, BS 500 provides service based on the service flow parameters of consulting as mentioned above to MS 560 with RS 540 and 550.
Fig. 6 is the flow chart that illustrates the operation of the BS in the multi-hop relay BWA communication system of the example embodiment according to the present invention.
With reference to figure 6, in step 601, BS determines whether the service flow of MS changes is necessary.Here, change under the situation of service flow parameters of being connected of being created (comprise the individual connects be connected both) change of generation service flow with BS under the situation of the service flow parameters of can create under the situation about connecting in MS request, the BS request being created under the situation about connecting, MS changes the connection created (comprise the individual connects be connected both with the tunnel) with the tunnel.Can handle by DSA and create new connection, and can handle the service flow parameters that changes the connection of being created by DSC.
If it is necessary that the service flow of MS changes, then BS generates in step 603 and admits control request message.Here, admitting control request message can be one of DSA-REQ message and DSC-REQ message, perhaps can be another message that defines separately.
In step 605, the RS of BS in the data transfer path of corresponding MS transmits and admits control request message.Here, admit control request message to comprise the service flow parameters (qos parameter set) of request admittance control.
Thereafter, in step 607, BS determines whether to receive the response message of this admittance control request message.Here, this response message can be one of DSA-RSP message and DSC-RSP message, perhaps can be another message that defines separately.
If receive the response message of this admittance control request message, then in step 609, BS determines whether that the access RS (for example, the last RS in the respective path) from MS receives this response message.If do not receive this response message from inserting RS, then BS advances to step 621.In step 621, based on the information that comprises in this response message, BS determines whether that the service flow of readjusting service flow parameters or not refusing MS changes (creating or parameter change).Here, if readjust service flow parameters, then BS turns back to step 603, transmits with the RS in respective path once more and admits control request.
If receive this response message from inserting RS, then BS advances to step 611.In step 611, BS determines service flow parameters based on the information that comprises in this response message.Here, can readjust the service flow change that service flow parameters maybe can be refused MS.
Thereafter, in step 613, BS generates the message that comprises definite service flow parameters.Here, this message can be one of DSA-RSP message and DSC-RSP message, perhaps can be another message that defines separately.
In step 615, BS transmits the message that generates to MS.In step 617, BS determines whether to receive corresponding A CK message from MS.If receive ACK message from MS, then BS advances to step 619.In step 619, the RS of BS in respective path transmits the message that comprises definite service flow parameters.Here, this message can be one of DSA-ACK message and DSC-ACK message, perhaps can be another message that defines separately.The service flow parameters of determining by above processing is set, and BS provides service based on the service flow parameters that is provided with to MS in correspondence database (memory).
Fig. 7 is the flow chart that illustrates the operation of the RS in the multi-hop relay BWA communication system of the example embodiment according to the present invention.
With reference to figure 7, in step 701, RS determines whether to receive admittance control request message from a last node (BS or a last RS).Here, this admittance control request message can be one of DSA-REQ message and DSC-REQ message, perhaps can be another message that defines separately.Here, this admittance control request message comprises the service flow parameters information (qos parameter set) of request admittance control.
If receive this admittance control request message, in step 703, RS carries out based on the qos parameter set of being asked that comprises in this message and admits control so.That is, RS determines whether the qos parameter set of being asked is supported.In step 705, RS determines whether it is the access RS that is positioned at the data transfer path end.
If RS inserts RS (in step 705), that is, if exist next to jump RS (that is, the RS of subordinate), then RS advances to step 707.In step 707, RS determines whether to admit the qos parameter set of being asked according to this admittance control result.If admit the qos parameter set of being asked, then RS advances to step 713.In step 713, RS next in respective path jumped RS and transmitted the admittance control request message that receives from a last node (or superior node).
On the other hand, if the qos parameter set of being asked can not support that then RS advances to step 709.In step 709, RS generate indicate the qos parameter set of being asked can not supportive response message.In step 711, RS transmits the response message that generates to BS.
On the other hand, if RS inserts RS (in step 705), then RS advances to step 715.In step 715, RS generates and comprises the response message of admitting the control result.In step 717, RS transmits this response message to BS.
The response message of this admittance control request can comprise indicate the qos parameter set of being asked can not supportive confirmation code and can accept parameter information (but can not support parameter identifier and the supported value of corresponding parameter).In addition, this response message can be one of DSA-RSP message and DSC-RSP message, perhaps can be another message that defines separately.
Therebetween, RS can receive the message (DSA-ACK, DSC-ACK) of the service parameter information that comprises that BS determines after the processing of Fig. 7.If receive this message, then RS is provided with determined service parameter in memory.Thereafter, RS provides service based on the service flow parameters that is provided with to corresponding MS.
Fig. 8 is the block diagram of the BS (or RS) of the example embodiment according to the present invention.
Because BS and RS have essentially identical interface module (communication module) and essentially identical configuration, so will describe configuration and the operation of BS and RS with reference to illustrated block diagram among the figure 8.Below be described in the context of time division duplex-OFDM (TDD-OFDMA) communication system and carry out, the invention is not restricted to this.Thus, will know to be understood that example embodiment of the present invention may be used on being used in combination the hybrid communication system of TDD scheme and Frequency Division Duplexing (FDD) (FDD) scheme, and may be used on using the cellular communication system of any other Resource Allocation Formula.
With reference to figure 8, BS (or RS) comprises service flow parameters memory 800, controller 802, message handling device 804, message generator 806, radio frequency (RF) receiver 808, analog to digital converter (ADC) 810, ofdm demodulator 812, decoder 814, encoder 816, OFDM modulator 818, digital to analog converter (DAC) 820, RF transmitter 822 and duplexer 824.
Based on duplexing scheme, the TX signal that duplexer 824 receives from RF transmitter 822 to the antenna transmission, and to the RX signal of RF receiver 808 transmission from the antenna reception.For example, based on the TDD scheme, the TX signal that duplexer 824 receives from RF transmitter 822 to the antenna transmission in the TX pattern, and in the RX pattern, transmit the RX signal that receives from antenna to RF receiver 808.
The RF conversion of signals that RF receiver 808 will receive by antenna is a base-band analog signal.The analog signal samplings that 810 couples of ADC receive from RF receiver 808 are being sampled data with analog signal conversion.Use fast Fourier transform (FFT), ofdm demodulator 812 is transformed to frequency domain data with sampled data, and selects the data of subcarrier from frequency domain data.
The various information that message generator 806 uses slave controller 802 to receive generate message, and this message are provided to the encoder 816 of physical layer.
In above-mentioned configuration, controller 802 serves as the protocol controller of control messages processor 804 and message generator 806.Controller 802 can be carried out the function of message handling device 804 and message generator 806.Although the corresponding function that provides independent unit to be used for controller 802, controller 802 can replace independent unit to carry out all or some corresponding functions.
In addition, controller 802 receives the essential information of protocol processes from the corresponding unit of physical layer, or provides control signal to the corresponding unit of physical layer.
To concentrate on the operation that media interviews are controlled the signaling process of execution in (MAC) layer, described BS and RS with reference to figure 8 illustrated configurations now.
The operation of BS at first will be described.
Thereafter, controller 802 determines whether to receive the response message of admitting control request message.If the response message of receiving, then controller 802 determines that service flow parameters readjust whether to be necessary, as whether to refuse MS service flow change or service flow parameters finally is not set.
If readjusted service flow parameters, then message generator 806 generates and comprises the admittance control request message of the service flow parameters of readjusting, and sends it to physical layer element.The admittance control request message that generates was carried out physical layer encodes before being sent to corresponding RS.
If finally be provided with service flow parameters, then message generator 806 generates and comprises the message (for example, DSA-RSP message or DSC-RSP message) of final service flow parameters, and sends it to physical layer element.The message that generates was carried out physical layer encodes before being sent to corresponding MS.
Thereafter, if receive corresponding A CK message (for example, DSA-ACK message or DSC-ACK message) from MS, then message generator 806 generate comprise final service flow parameters message (for example, DSA-ACK message or DSC-ACK message), and send it to physical layer element.Be carried out physical layer encodes before the RS of message in being sent to respective path that generates.
Therebetween, the final service flow parameters of storage in service flow parameters memory 800.Thereafter, controller 802 provides service based on the service flow parameters of storage in the memory 800 to corresponding MS.
The operation of RS will be described now.
If RS is the access RS that is positioned at the respective path end, then message generator 806 generates and comprises the response message (for example, DSA-RSP message or DSC-RSP message) of admitting the control result.The message that generates was carried out physical layer encodes before being sent to BS.
If RS inserts RS can not support the qos parameter set of being asked, then message generator 806 generates the admittance control request message that comprises corresponding with service stream parameter.The message that generates next in being sent to respective path is carried out physical layer encodes before jumping RS.
If RS inserts RS can not support the qos parameter set of being asked, then message generator 806 generate comprise indicate the qos parameter set of being asked can not supportive confirmation code and can accept the response message (for example, DSA-RSP message or DSC-RSP message) of qos parameter information.The message that generates was carried out physical layer encodes before being sent to BS.
Therebetween, controller 802 determines whether to receive final service flow parameters (for example, DSA-ACK message or DSC-ACK message) from a last node.If receive final service flow parameters, then controller 802 is stored in it in service flow parameters memory 800.Thereafter, controller 802 provides service based on the service flow parameters of storage in the memory 800 to corresponding MS.
Fig. 9 is the flow chart of the signal flow of the service flow that illustrates the execution MS in the multi-hop relay BWA communication system of another example embodiment according to the present invention admittance control of adding request.
With reference to figure 9, in step 901, MS 960 transmits the DSA-REQ message that is used to create new connection to BS 900.In step 903, BS 900 transmits the DSA-REQ message that comprises the qos parameter set of being asked to the middle RS 940 as the data transfer path of MS 960.
In step 905, middle RS 940 carries out based on the qos parameter set of being asked that comprises the DSA-REQ message that receives from BS and admits control.That is, middle RS 940 determines whether the qos parameter set of being asked is supported.Here, if the qos parameter set of being asked is supported, then middle RS 940 will transmit the DSA-REQ message to the RS of subordinate's (access) 950 of next jumping.
If do not admit the qos parameter set of being asked, then RS 940 can accept the service flow parameters value comprising from the DSA-REQ message that BS receives, and in step 907 DSA-REQ message is sent to next and jumps RS.In this example, suppose in middle RS 940, not support the qos parameter set of being asked.
In addition, next is jumped RS and carries out admittance control based on the institute's requested service stream parameter the DSA-REQ message that receives from a last RS.Here, if do not admit institute's requested service stream parameter, then corresponding middle RS comprises in DSA-REQ message can accept the service flow parameters value, and DSA-REQ message is sent to next jumping RS.Here, if from comprised the supported service flow parameters value of a RS the DSA-REQ message that receives of a RS, then go up a RS and add or upgrade and can accept the service flow parameters value, and corresponding DSA-REQ message is sent to next jumping RS.
If transmit DSA-REQ message to inserting RS 950 (that is, the last RS in the data transfer path of MS), then in step 909, insert RS 950 and carry out admittance control based on the qos parameter set of being asked in the DSA-REQ message by above processing.In this example, suppose that access RS 950 does not support the qos parameter set of being asked.Here, if do not admit the qos parameter set of being asked, then in step 911, insert RS 950 interpolations or renewal and can accept the service flow parameters value, and will comprise that its DSA-RSP message is sent to RS 940.In step 913, RS 940 transmits DSA-RSP message to BS 900.Here, DSA-RSP message can comprise indicate the qos parameter set of being asked can not supportive confirmation code and the MS path in RS acceptable QoS parameter information.The information that comprises in the DSA-RSP message can be used by BS and strategic server, to determine the service flow parameters of MS.
Therebetween, if receive DSA-RSP message, then in step 915, BS 900 determines the service flow parameters of MS, and transmits the DSA-RSP message that comprises definite service flow parameters to MS 960, and MS 960 transmits DSA-ACK message to BS 900.
In step 917, BS 900 transmits the DSA-ACK message that comprises definite service flow parameters to RS 940.In step 919, RS 940 transmits DSA-ACK message to RS 950.
The illustrated operation of Fig. 9 may be used on by the situation (BS-startup) of BS interpolation or renewal MS service flow, is upgraded the situation (MS-startup) and the interpolation of the service flow of being created or upgraded the situation that tunnel service flows by MS.
As mentioned above, example embodiment of the present invention has defined the BS of admittance control of qos parameter of the service flow that is used for multihop relay system and the signaling between the one or more RS.Thus, BS can manage the resources supplIes of RS.In addition, based on the resources supplIes of RS, the BS restructural be used to support MS service the path or can easily carry out the switching controls of MS.
Although illustrate and described the present invention with reference to some example embodiment of the present invention, but what those skilled in the art will appreciate that is, can carry out the various changes of form and details here, and not break away from the spirit and scope of the present invention of claims and equivalent qualification thereof.
Claims (30)
1. method that is used at the wireless communication system operation relay station that uses the multi-hop relay scheme, this method comprises:
Receive the request message of the acceptance controlling decision of request service flow from a last node;
Determine whether the qos parameter set of being asked that comprises in this request message is supported;
If the qos parameter set of being asked is supported, then this request message is forwarded to data transfer path in next jump corresponding subordinate relay; With
If the qos parameter set of being asked can not support, what then will indicate the qos parameter set of being asked can not supportive response message be sent to the base station.
2. according to the process of claim 1 wherein that this request message comprises one of dynamic Service interpolation-request (DSA-REQ) message and dynamic Service change-request (DSC-REQ) message.
3. according to the process of claim 1 wherein that this response message comprises that (DSA-RSP) message is added-replied to dynamic Service and dynamic Service changes-reply one of (DSC-RSP) message.
According to the process of claim 1 wherein this response message comprise indicate the qos parameter set of being asked can not supportive confirmation code (CC) and relay station in the qos parameter set accepted among at least one.
5. according to the method for claim 1, also comprise:
Receive from this base station and to comprise that the service flow parameters of admittance receives (ACK) message really; With
The service flow parameters of being admitted is set.
6. according to the method for claim 5, wherein this ACK message comprises one of DSA-ACK message and DSC-ACK message.
7. according to the process of claim 1 wherein that this service flow comprises one of individual service stream and tunnel service stream.
8. acceptance controlling method that is used in the service flow of the wireless communication system that uses the multi-hop relay scheme, this method comprises:
If asked the service flow of mobile radio station to change, then the relay station from the data transfer path of base station between base station and mobile radio station transmits the request message of request acceptance controlling decision;
Relay station is carried out based on the qos parameter set of being asked that comprises in this request message and is admitted control; With
If the qos parameter of being asked is supported, then transmit this request message to the subordinate relay corresponding with next jumping the data transfer path from this relay station.
9. method according to Claim 8, wherein this request message comprises one of dynamic Service interpolation-request (DSA-REQ) message and dynamic Service change-request (DSC-REQ) message.
10. method according to Claim 8 also comprises: if the qos parameter set of being asked can not support, then from this relay station to the base station transmit indicate the qos parameter set of being asked can not supportive response message.
11. according to the method for claim 10, wherein this response message comprises that (DSA-RSP) message is added-replied to dynamic Service and dynamic Service changes-reply one of (DSC-RSP) message.
12. method according to Claim 8 also comprises: the base station is in case receive response message from relay station, just execution admittance control;
Transmit the message of the service flow parameters that comprises admittance to mobile radio station from the base station; With
One or more relay stations from the base station to data transfer path transmit and comprise that the service flow parameters of being admitted receives ACK message really.
13. according to the method for claim 12, wherein this ACK message comprises one of DSA-ACK message and DSC-ACK message.
14. method according to Claim 8, wherein when the mobile radio station request create to connect, when the service flow parameters that base station requests is created when connecting, be used for the connection created when the service flow parameters that is used for the connection created when the mobile radio station request changes and when base station requests changes, the service flow change of request mobile radio station.
15. method according to Claim 8, wherein this service flow comprises one of individual service stream and tunnel service stream.
16. an equipment that is used at the relay station of the wireless communication system that uses the multi-hop relay scheme, this equipment comprises:
Receiver is used for from the request message of the acceptance controlling decision of last node reception request service flow;
Controller is used for determining whether the qos parameter set of being asked that this request message comprises is supported; With
Transmitter, if the qos parameter set that is used for being asked is supported, then this request message is sent to data transfer path in next jump corresponding subordinate relay, if and the qos parameter set that is used for being asked can not be supported, what then will indicate the qos parameter set of being asked can not supportive response message be sent to the base station.
17. according to the equipment of claim 16, wherein this request message comprises one of dynamic Service interpolation-request (DSA-REQ) message and dynamic Service change-request (DSC-REQ) message.
18. according to the equipment of claim 16, wherein this response message comprises that (DSA-RSP) message is added-replied to dynamic Service and dynamic Service changes-reply one of (DSC-RSP) message.
19. according to the equipment of claim 16, wherein this response message comprise indicate the qos parameter set of being asked can not supportive confirmation code (CC) and relay station in the qos parameter set accepted among at least one.
20. according to the equipment of claim 16, wherein this controller receives from this base station and comprises that the service flow parameters of admittance receives (ACK) message really, and the service flow parameters of being admitted is set.
21. according to the equipment of claim 20, wherein this ACK message comprises one of DSA-ACK message and DSC-ACK message.
22. according to the equipment of claim 16, wherein this service flow comprises one of individual service stream and tunnel service stream.
23. a method that is used in the wireless communication system operation base station of using the multi-hop relay scheme, this method comprises:
If asked the service flow of mobile radio station to change, then the relay station in the data transfer path between base station and mobile radio station transmits the request message of request acceptance controlling decision;
Receive the response message of this request message from relay station;
Carry out the admittance control of service flow based on the information that comprises in this request message; With
Transmit the message that comprises the service flow of being admitted to mobile radio station.
24. method according to claim 23, when the service flow parameters of the connection that is used to create when wherein the service flow parameters of the connection that connects when creating, is used to create when the mobile radio station request when the mobile radio station request connect to be created, when base station requests changes and when base station requests changes, the service flow change of request mobile radio station.
25. according to the method for claim 23, wherein this service flow comprises one of individual service stream and tunnel service stream.
26. according to the method for claim 23, wherein this request message comprises one of dynamic Service interpolation-request (DSA-REQ) message and dynamic Service change-request (DSC-REQ) message.
27. according to the method for claim 23, wherein this response message comprises that (DSA-RSP) message is added-replied to dynamic Service and dynamic Service changes-reply one of (DSC-RSP) message.
28. according to the method for claim 23, wherein this response message comprise indicate the qos parameter set of being asked can not supportive confirmation code and relay station in the qos parameter set accepted at least one.
29. the method according to claim 23 also comprises: relay station in data transfer path transmits and comprises that the service flow parameters of being admitted receives ACK message really.
30. according to the method for claim 29, wherein this ACK message comprises one of DSA-ACK message and DSC-ACK message.
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| KR22070/08 | 2008-03-10 | ||
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| JP (1) | JP5544398B2 (en) |
| KR (1) | KR101292578B1 (en) |
| CN (1) | CN101534521A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102835175A (en) * | 2010-03-10 | 2012-12-19 | Lg电子株式会社 | Apparatus and method for scheduling of adaptive grant and polling service in a broadband wireless access system |
| CN103246231A (en) * | 2013-05-14 | 2013-08-14 | 中铁上海工程局有限公司 | Method for relaying pipe-jacking automatic measuring guidance system radio station |
| WO2019042396A1 (en) * | 2017-09-04 | 2019-03-07 | 华为技术有限公司 | Method and device for network access and access control |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7764617B2 (en) * | 2002-04-29 | 2010-07-27 | Harris Corporation | Mobile ad-hoc network and methods for performing functions therein based upon weighted quality of service metrics |
| US6954435B2 (en) * | 2002-04-29 | 2005-10-11 | Harris Corporation | Determining quality of service (QoS) routing for mobile ad hoc networks |
| US8391254B2 (en) * | 2005-10-06 | 2013-03-05 | Samsung Electronics Co., Ltd | Channel configuration and bandwidth allocation in multi-hop cellular communication networks |
| EP1773091B1 (en) * | 2005-10-06 | 2018-12-05 | Samsung Electronics Co., Ltd. | Method of configuring channel and allocating resources in a multi-hop relay wireless communication system |
| US8483123B2 (en) * | 2006-06-30 | 2013-07-09 | Nokia Corporation | QoS request and information distribution for wireless relay networks |
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- 2008-03-14 KR KR1020080024087A patent/KR101292578B1/en active IP Right Grant
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- 2009-03-10 CN CNA2009101192614A patent/CN101534521A/en active Pending
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102835175A (en) * | 2010-03-10 | 2012-12-19 | Lg电子株式会社 | Apparatus and method for scheduling of adaptive grant and polling service in a broadband wireless access system |
| CN103246231A (en) * | 2013-05-14 | 2013-08-14 | 中铁上海工程局有限公司 | Method for relaying pipe-jacking automatic measuring guidance system radio station |
| CN103246231B (en) * | 2013-05-14 | 2015-07-15 | 中铁上海工程局集团有限公司 | Method for relaying pipe-jacking automatic measuring guidance system radio station |
| WO2019042396A1 (en) * | 2017-09-04 | 2019-03-07 | 华为技术有限公司 | Method and device for network access and access control |
| EP3668137A4 (en) * | 2017-09-04 | 2020-11-11 | Huawei Technologies Co., Ltd. | Method and device for network access and access control |
| US11234188B2 (en) | 2017-09-04 | 2022-01-25 | Huawei Technologies Co., Ltd. | Methods of multi-hop relay node access, and apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012235488A (en) | 2012-11-29 |
| KR20090097070A (en) | 2009-09-15 |
| KR101292578B1 (en) | 2013-08-12 |
| JP5544398B2 (en) | 2014-07-09 |
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