CN101415214B - Method and apparatus for negotiating relay system switching - Google Patents
Method and apparatus for negotiating relay system switching Download PDFInfo
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- CN101415214B CN101415214B CN2007101640005A CN200710164000A CN101415214B CN 101415214 B CN101415214 B CN 101415214B CN 2007101640005 A CN2007101640005 A CN 2007101640005A CN 200710164000 A CN200710164000 A CN 200710164000A CN 101415214 B CN101415214 B CN 101415214B
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Abstract
The invention discloses a switch consultation method used in a relay system. The method comprises the following steps: a target multihop relay base station (MR-BS) sends a request message of switch information to a target relay station (RS), the request message is used for switch consultation of a terminal MS; the target MR-BS receives a response message of the switch information sent by the target RS, and acquires a consultation result of the target RS for the switch. The invention further discloses a device used for realizing the switch consultation in the relay system. By the method and the device, a parameter switch consultation is realized between a service MR-BS and a distributed scheduling RS in an alternative switch target station during the switch process of the relay system, which reduces the switch time of the MS in the relay system.
Description
Technical field
The present invention relates to communication technical field, relate in particular to switching negotiation and equipment in a kind of relay system.
Background technology
Continuous development along with the communication technology; Requirement to the communication system access rate is also improving constantly; For satisfying the requirement of access rate, adopt BWA (Broadband Wireless Access, the broadband wireless access) communication system of mode more and more to receive people's attention.Communication system based on the IEEE802.16e standard is exactly a kind of BWA communication system.
Can be known that by the radio communication theory tranmitting frequency is high more, radio wave is fast more with range attenuation.802.16e the operating frequency of communication system is than higher, thereby the coverage of BS is very limited.For this reason; The 16j task groups of IEEE802 working group is being set up multi-hop wireless relay communications system standard at present; Make new system can support MS (Mobile Station based on the 802.16e standard; Travelling carriage) communicates through 1 or a plurality of RS (RelayStation, relay station) and BS (Base Station, base station).Wherein, RS carries out information interaction through air interface and BS, MS or other RS.
In 802.16e, in order to optimize handoff procedure, MS can unite candidate's switching target BS before switching and (refers to the optional initiating ranging process that MS carries out at sweep spacing and a certain neighbours BS; The function of associating is MS to be obtained and record ranging parameters and service availability information; The purpose of associating is to select suitable switching target BS and/or accelerate the following potential process that switches to target BS); In combined process, need find range (referring to that MS constantly adjusts emission timing, power and frequency to reach the process that BS can receive the degree of data satisfactorily), so MS just can obtain united the ranging parameters at BS place BS.These parameters are effectively within a certain period of time, can are used for handoff procedure is optimized by MS, thereby in the handoff procedure of reality, dispense ranging process, save MS switching time.
Specifically, said process is:
MS can dope the term of validity of resulting ranging parameters after carrying out combined process to candidate handover target BS.MS is through MOB_SCN-REP (scan report) this term of validity to its prediction of serving BS broadcasts report, promptly through the TLV (Type/Length/Value, type) among the MOB_SCN-REP: Ranging_Parameters_Validity_Time.
Serving BS broadcasts will consult whether to admit MS and Action time (time of implementation) with target BS; Actiontime is meant in actual handover process; Target BS is to the time that MS sends Fast_Ranging-IE (quick distance measurement IE), and MS is used to send RNG-REQ (distance measurement request) message according to the resource that this IE distributes.
MS and BS all can initiate to switch.If MS initiates to switch, and is as shown in Figure 1, may further comprise the steps:
Step s101, MS send MOB_SCN-REP (scan report) to serving BS broadcasts.
Step s102, MS send MOB_MSHO-REQ (handoff request message) to serving BS broadcasts.
Step s103, serving BS broadcasts are sent MOB_BSHO-RSP (switching response message) to MS, the Action Time notice MS that will confirm simultaneously.
Step s104, MS send HO_IND (switching indication) and begin to switch to target BS to serving BS broadcasts.
Step s105, target BS are distributed to MS Fast_Ranging-IE.
If BS initiates to switch, and is as shown in Figure 2, may further comprise the steps:
Step s201, MS send MOB_SCN-REP (scan report) to serving BS broadcasts.
Step s202, serving BS broadcasts are sent MOB_BSHO-REQ (handoff request message) to MS, and the Action Time that will confirm simultaneously notifies MS.
Step s204, MS send HO_IND (switching indication) and begin to switch to target BS to serving BS broadcasts.
Step s205, target BS are distributed to MS Fast_Ranging-IE.
In the multi-hop wireless relay communications system, be (the Multihop relay base station that is independent of MR_BS owing to have distributed scheduling RS, its resource allocation; The multi-hop relay station); Therefore, when the candidate station that MS switches is distributed scheduling RS, to the negotiation of Action time; Must participate in by distributed scheduling RS, and not relate to this way to solve the problem in the prior art.
Summary of the invention
Embodiments of the invention provide switching negotiation and the equipment in a kind of relay system, are used for solving the handoff procedure of relay system, the problem that the distributed scheduling RS in service MR-BS and the candidate handover target station holds consultation.
For achieving the above object, embodiments of the invention provide the switching negotiation in a kind of relay system, may further comprise the steps:
Target multi-hop relay station MR-BS sends the handover information request message to target relay RS, is used for the switching of terminal MS is held consultation;
Said target MR-BS receives the handover information response message that said target RS sends, and obtains the negotiation result of said target RS to said switching.
Embodiments of the invention also provide the switching negotiation in a kind of relay system, may further comprise the steps:
The handover information request message that the target relay RS receiving target MR-BS of distributed scheduling sends, described request message is used for the switching of terminal MS is held consultation;
Said target RS generates the handover information response message and to said target MR-BS transmission, carries the negotiation result of said target RS to said switching in the said handover information response message according to said handover information request message.
Embodiments of the invention also provide a kind of target multi-hop relay station MR-BS, are used for carrying out handover negotiation optimization with the target relay RS of distributed scheduling, comprising:
The request message transmitting element is used for the handover information request message that is used for the switching of terminal MS is held consultation that the request message generation unit generates is sent to said target RS;
The request message generation unit is used to generate the handover information request message that sends to said target RS, and sends to the described request message sending unit;
The response message receiving element is used to receive the handover information response message that said target RS sends.
Embodiments of the invention also provide a kind of target relay RS of distributed scheduling, are used for carrying out handover negotiation optimization with target multi-hop relay station MR-BS, comprising:
The request message receiving element is used to receive the handover information request message that said target MR-BS sends;
The response message generation unit is used for the handover information request message according to the reception of described request message sink unit, generates the handover information response message;
The response message transmitting element is used for sending with the handover information response message of said response message generation unit generation and to said target MR-BS.
Compared with prior art, embodiments of the invention have the following advantages:
Realized in the handoff procedure of relay system that the distributed scheduling RS in service MR-BS and the candidate handover target station carries out handoff parameter to be consulted, and has reduced the switching time of MS in the relay system.
Description of drawings
Fig. 1 is the optimization switching flow sketch map when MS initiates to switch in the prior art;
Fig. 2 is the optimization switching flow sketch map when BS initiates to switch in the prior art;
Fig. 3 is the switching negotiation flow chart in the relay system of the embodiment of the invention one;
Fig. 4 is the switching negotiation flow chart in the relay system of the embodiment of the invention two;
Fig. 5 is handover negotiation optimization system and the equipment sketch map in the relay system of the embodiment of the invention three.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes.
In the embodiments of the invention one, the switching negotiation in a kind of relay system is as shown in Figure 3, is used for solving how MR-BS carries out parameter negotiation with the distributed scheduling RS at candidate handover target station problem, comprises the steps:
Step s301, target MR-BS send the handover information request message to target RS, are used for the switching at terminal is held consultation.
Concrete; The sign such as MAC (the Media AccessControl that comprise the MS that will switch in this request message; The medium access control) address; Simultaneously, according to the ability of target MR-BS, can also send the Action time of core net decision, perhaps send the relevant information of MS to target RS in the storage of core net place to target RS.
Step s302, target RS send the handover information response message to target MR-BS, carry the negotiation result to switching.
According to the difference of content included in the target MR-BS transmission handover information request message, target RS judges handoff request, generates different response results and is carried in the handover information response message and send to target MR-BS.Concrete, can comprise the result who whether admits MS, and the handoff parameter of when admitting MS, being advised.
Changing method in a kind of relay system is provided in the embodiments of the invention two, and as shown in Figure 4, this method specifically may further comprise the steps:
Step s401, target MR-BS send MOB_INF-REQ (handover information request message) to target RS.
Before this step, if the service MR-BS and the target MR-BS that service are provided for MS not in same sub-district, then target MR-BS at first receives the message that service MR-BS is sent.Concrete, service MR-BS can obtain the TLV among the MOB_SCN-REP after receiving that MS sends or being relayed to the MOB_SCN-REP of equipment of itself by RS.When this TLV was not 0, service MR-BS had just obtained the ranging parameters term of validity Ranging_Parameters_Validity_Time of MS prediction.According to this information, service MR-BS, is sent MS to target MR-BS and is switched involved parameter with target MR-BS contact through core net, like the MAC Address of MS etc.If be positioned at same sub-district for MS provides the service MR-BS of service and target MR-BS, then target MR-BS and service MR-BS are same equipment, do not need the step of this interacting message.
Target MR-BS sends MOB_INF-REQ to target RS; The MAC Address that comprises the MS that will switch in the message; Simultaneously, according to the ability of target MR-BS, can send the Action time of core net decision, perhaps send the relevant information of MS to target RS in the storage of core net place to RS; Such as: the ranging parameters term of validity TLV of MS prediction and/or QoS (Quality of Service, the service quality) requirement of MS.
Step s402, target RS send MOB_INF-RSP (handover information response message) to target MR-BS.
In this step, target RS sends corresponding M OB_INF-RSP according to the particular content of MOB_INF-REQ to target MR-BS.Specifically comprise following two kinds of situation:
When (1) the Action Time of core net decision being arranged in request message, whether target RS judges whether to admit MS and this Action Time suitable according to the MS information at this RS place (such as the uplink quality of MS when the associating etc.).Concrete judgement comprises following three kinds of situation:
1.1) if the Action time that admits this MS and core net to confirm, then target RS would carry out positive response through MOB_INF-RSP, and in MOB_INF-RSP, carries the MS MAC Address of admittance and affirm the Action time in the request message.
1.2) if do not admit this MS, then target RS carries the MAC Address of MS and excludes this MS in MOB_INF-RSP.
1.3) if admit this MS still to need to revise Action time, then target RS carries the MAC Address of the MS of admittance in MOB_INF-RSP, and carries the Action time of suggestion.
(2) in request message, there is not Action Time and when comprising the MS information that core net provides, target RS just utilizes these information and the information that is stored in this RS, judges whether to admit this MS.Concrete judgement comprises following three kinds of situation:
2.1) if admit this MS, then target RS generates Action Time, carry the MS MAC Address of admittance and will provide the Action time of suggestion at MOB_INF-RS.
2.2) if do not admit this MS, then target RS carries the MAC Address of MS and excludes this MS in MOB_INF-RS.
Method through using the foregoing description to provide has realized in the handoff procedure of relay system, and the distributed scheduling RS in service MR-BS and the candidate handover target station carries out handoff parameter to be consulted, and has reduced the switching time of MS in the relay system.
Embodiments of the invention three provide handover negotiation optimization system and the equipment in a kind of relay system, are used for realizing that the MR-BS of relay system and the distributed scheduling RS in the candidate handover target station carry out handover negotiation optimization, and its structure is as shown in Figure 5, comprising:
Target MR-BS10 when being used for carrying out the switching of MS, generating the handover information request message and sends to target RS, is used for carrying out handover negotiation optimization with target RS.
Target RS20; When being used to receive the handover information request message of target MR-BS10 transmission; According to the content of carrying in the handover information request message; And the content obtained of equipment of itself, switching is judged, and generated the handover information response message and send to target MR-BS10 according to judged result.This judged result comprises: comprise the result who whether admits MS, and the handoff parameter of when admitting MS, being advised.
Concrete, target MR-BS10 further comprises:
Request message transmitting element 11 is used for the handover information request message that request message generation unit 12 generates is sent to target RS20.
Request message generation unit 12 is used to generate the handover information request message that sends to target RS20, and sends to request message transmitting element 11.Concrete, comprise the MAC Address of the MS that will switch in this request message, simultaneously, according to the ability of target MR-BS, can also to target RS send the core net decision Action time, or send the relevant information of MS in the storage of core net place to target RS.
Response message receiving element 13 is used for the handover information response message that receiving target RS20 sends.
Concrete, target RS20 further comprises:
Request message receiving element 21 is used for the handover information request message that receiving target MR-BS10 sends.
Response message generation unit 22 is used for the handover information request message according to 21 receptions of request message receiving element, generates the handover information response message.When in request message, comprising the Action Time of core net decision, if admittance MS and Action time then add the MAC Address of the MS that admits and affirm said Action time in the handover information response message that generates; Still need to revise Action time as if admittance MS, then the MAC Address of the MS of interpolation admittance and the Actiontime of suggestion in the handover information response message of generation; If do not admit MS, then in the handover information response message that generates, add the MAC Address of MS and exclude MS.When in request message, comprising the MS information that core net provides,, then generate Action Time and in the handover information response message, add the MAC Address of the MS that admits and the Action time of generation if admit MS; If do not admit MS, then in the handover information response message, carry the MAC Address of MS and exclude MS.
Wherein, this unit further comprises MS admission judgment subelement 221 and Action time judgment sub-unit 222.Concrete, whether MS admission judgment unit 221 is used for admitting MS to judge, and Action time judging unit is used for judging whether that the Actiontime that receives the Action Time of core net decision or generate suggestion is used to add to response message.
Response message transmitting element 23 is used for sending with the handover information response message of response message generation unit 22 generations and to target MR-BS10.
Through system and the equipment that uses the foregoing description to provide, realized in the handoff procedure of relay system that the distributed scheduling RS in service MR-BS and the candidate handover target station carries out handoff parameter to be consulted, and has reduced the switching time of MS in the relay system.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprises that some instructions are used so that an equipment is carried out the described method of each embodiment of the present invention.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (12)
1. the switching negotiation in the relay system is characterized in that, may further comprise the steps:
Target multi-hop relay station MR-BS sends the handover information request message to the target relay RS of distributed scheduling, is used for the switching of terminal MS is held consultation;
Said target MR-BS receives the handover information response message that said target RS sends, and obtains the negotiation result of said target RS to said switching.
2. the switching negotiation in the relay system according to claim 1 is characterized in that said target MR-BS comprises in the handover information request message that said target RS sends:
The time of implementation Action time of the sign of the MS that need switch and core net decision; Or
The relevant information of the said MS of the sign of the MS that need switch and the storage of core net place.
3. like the switching negotiation in the said relay system of claim 2, it is characterized in that, in the negotiation result of said target RS that said target MR-BS gets access to, comprising said switching:
The sign of the MS that said target RS admits, and the Action time that carries in the agreement described request message; Or
The sign of the MS that said target RS admits, and the Action time of suggestion use; Or
The sign of the MS that said target RS excludes.
4. the switching negotiation in the relay system is characterized in that, may further comprise the steps:
The handover information request message that the target relay RS receiving target MR-BS of distributed scheduling sends, described request message is used for the switching of terminal MS is held consultation;
Said target RS generates the handover information response message and to said target MR-BS transmission, carries the negotiation result of said target RS to said switching in the said handover information response message according to said handover information request message.
5. like the switching negotiation in the said relay system of claim 4, it is characterized in that, in the handover information request message that the said target MR-BS that said target RS receives sends, comprising:
The time of implementation Action time of the sign of the MS that need switch and core net decision; Or
The relevant information of the said MS of the sign of the MS that need switch and the storage of core net place.
6. like the switching negotiation in the said relay system of claim 5, it is characterized in that said RS generates the handover information response message and is specially according to said handover information request message:
When comprising the Action Time of core net decision in the described request message, whether said target RS judges whether to admit MS and said Action Time suitable according to the MS information at this RS place;
Said target RS generates the handover information response message according to said judged result.
7. like the switching negotiation in the said relay system of claim 6, it is characterized in that said target RS generates the handover information response message according to said judged result and is specially:
When admitting said MS and Action time, in said handover information response message, carry sign and the sure said Action time of the MS of admittance; Or
Admit said MS but when need revising Action time, in said handover information response message, carry sign and the Action time of suggestion of the MS of admittance; Or
When not admitting said MS, in said handover information response message, carry the sign of MS and exclude said MS.
8. like the switching negotiation in the said relay system of claim 5, it is characterized in that said RS generates the handover information response message and is specially according to said handover information request message:
When comprising the MS information that core net provides in the described request message, said target RS judges whether to admit said MS according to said MS information and the information that is stored in this RS;
Said target RS generates the handover information response message according to said judged result.
9. like the switching negotiation in the said relay system of claim 8, it is characterized in that said target RS generates the handover information response message according to said judged result and is specially:
When admitting said MS, generate Action Time and in said handover information response message, carry sign and the Action time of said generation of the MS of admittance;
When not admitting said MS, in said handover information response message, carry the sign of MS and exclude said MS.
10. a target multi-hop relay station MR-BS is characterized in that, is used for carrying out handover negotiation optimization with the target relay RS of distributed scheduling, comprising:
The request message transmitting element is used for the handover information request message that is used for the switching of terminal MS is held consultation that the request message generation unit generates is sent to said target RS;
The request message generation unit is used to generate the handover information request message that sends to said target RS, and sends to the described request message sending unit;
The response message receiving element is used to receive the handover information response message that said target RS sends.
11. the target relay RS of a distributed scheduling is characterized in that, is used for carrying out handover negotiation optimization with target multi-hop relay station MR-BS, comprising:
The request message receiving element is used to receive the handover information request message that said target MR-BS sends;
The response message generation unit is used for the handover information request message according to the reception of described request message sink unit, generates the handover information response message;
The response message transmitting element is used for sending with the handover information response message of said response message generation unit generation and to said target MR-BS.
12., it is characterized in that said response message generation unit further comprises like the said target relay RS of claim 11:
Whether MS admission judgment subelement is used for admitting the MS of said handover information request message to judge, and judged result is added in the response message;
Action time judgment sub-unit, the Action time that is used for judging whether receiving the Action Time of the core net decision that said handover information request message carries or generates suggestion is used for adding to response message.
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| CN101990221A (en) * | 2009-08-07 | 2011-03-23 | 中兴通讯股份有限公司 | Method for transmitting cell switching information and base stations thereof |
| CN102045780A (en) * | 2009-10-09 | 2011-05-04 | 中兴通讯股份有限公司 | Method and system for negotiating mobility parameter in LTE mobile communication system |
| CN102164385B (en) * | 2010-02-21 | 2015-01-07 | 华为技术有限公司 | Switching method and relay node |
| CN104754672A (en) * | 2015-03-03 | 2015-07-01 | 上海华为技术有限公司 | Redirection method and related equipment |
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| CN101009926A (en) * | 2005-10-17 | 2007-08-01 | 三星电子株式会社 | Apparatus and method for supporting handover in a wireless access communication system |
| CN101014183A (en) * | 2005-10-17 | 2007-08-08 | 三星电子株式会社 | Apparatus and method for switching in a wireless access communication system |
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| CN101009926A (en) * | 2005-10-17 | 2007-08-01 | 三星电子株式会社 | Apparatus and method for supporting handover in a wireless access communication system |
| CN101014183A (en) * | 2005-10-17 | 2007-08-08 | 三星电子株式会社 | Apparatus and method for switching in a wireless access communication system |
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