CN100403718C - Method and apparatu for recovering service flow identification in WiMAX network - Google Patents
Method and apparatu for recovering service flow identification in WiMAX network Download PDFInfo
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- CN100403718C CN100403718C CNB2005101239504A CN200510123950A CN100403718C CN 100403718 C CN100403718 C CN 100403718C CN B2005101239504 A CNB2005101239504 A CN B2005101239504A CN 200510123950 A CN200510123950 A CN 200510123950A CN 100403718 C CN100403718 C CN 100403718C
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Abstract
The present invention discloses a method for recovering service flow identifies in a WiMAX network. After the termination of service flow on a mobile station in the method, an entity which provides the service flow for the mobile station at present is used for judging whether SFID of the terminated service flow is distributed by the entity; the SFID is arranged in a usable state if the SFID of the terminated service flow is distributed by the entity, and otherwise an entity which provides SFID services for the mobile station at present sends messages of releasing the SFID to the entity for distributing the SFID; after receiving the messages, the entity for distributing the SFID can arrange the recovering service flow identifies designated in the messages in a usable state. Simultaneously, the present invention also discloses a device used for the WiMAX network, which comprises a memory module, an identification module and a notification module.
Description
Technical field
The present invention relates to micro-wave access to global intercommunication (WiMAX) technology of the communications field, relate in particular to the method and the device that in the WiMAX network, reclaim the service flow sign.
Background technology
Extensive use along with the flourish and wireless network of internet service, the WiMAX system has obtained a large amount of application and has paid close attention to the .WiMAX system how to be applied to the mobile subscriber with its good wireless access characteristic, better provide Packet Service between network and the mobile subscriber is transmitted or the function of route becomes industry research new focus .WiMAX network architecture system as shown in Figure 1, wherein the function of each network element is as follows:
1, access service network (ASN): ASN is defined as the network function set that the WiMAX terminal provides the wireless access service, and ASN has comprised base station (BS) and access service network gateway (ASN GW) .ASN mainly provides following function:
The function of A, BS:
-provide the L2 of BS and MSS to be connected;
-RRM;
-measure and power control;
The compression and the encryption of-the data of eating dishes without rice or wine.
The function of B, ASN GW:
-provide client functionality for MSS authentication function;
-support the network of NSP to find and selection;
-the Relay function (as IP address assignment) of L3 information is provided for MSS;
-RRM.
Except above-mentioned functions, can also comprise (non-essential function):
Switch in-the ASN
-MSS paging and location management
Tunnel management between the-ASN-CSN is equivalent to the external agent (FA) in the mobile IP technology
The registration of-vision location
2, connectivity serving network (CSN): CSN is defined as to the WiMAX terminal IP is provided Connection Service.
CSN mainly provides following function:
The IP address assignment of-MSS;
-Internet inserts;
-AAA proxy or server;
-based on user's authorization control;
-ASN is equivalent to the home agent (HA) in the mobile IP technology to the tunnel of CSN;
-WiMAX user's charging and the clearing between the operator;
Tunnel under the-roaming condition between the CSN;
Switching between the-ASN;
-various WiMAX services (as location-based business, multi-medium multi-packet broadcasting and broadcasting service, IP Multimedia System business).
3, travelling carriage (MSS): MSS is a mobile subscriber equipment, and the user uses this devices accessing WiMAX network.
MSS inserts the BS that uses and is called serving BS broadcasts (Serving BS). for the MSS that uses certain serving BS broadcasts to insert, and the ASN GW that the R6 interface is arranged between this BS, be called service ASN GW (Serving ASN GW), for example ASN GW1 just is to use the service ASN GW. of the MSS of BS1 or BS2 access to provide ASN to be called anchor ASN GW (Anchor ASN GW) to the ASN GW of the Interface R3 between the HA of CSN among Fig. 1, anchor ASN GW among Fig. 1 is a logic entity, its can with the ASN GW1 among Fig. 1, logic entities such as ASN GW2 are present in that the interface between the .ASN GW is called Interface R4 in the identical or different physical entity. when anchor ASN GW is present in the identical physical entity with service ASN GW, interface between the two belongs to the device interior interface, not necessarily will use the standard Interface R4.
From data flow, the grouping busihess data bag of descending MSS passes through Interface R3 from the HA of CSN, be sent among the ASN. after the grouping busihess data bag of descending MSS enters ASN, being sent to the service ASN GW of MSS through the Interface R4 of ASN inside, and sending on the MSS through the R6 interface between the inner ASN GW of ASN and the BS and the R1 interface between BS and the MSS data MSS by service ASN GW. upstream data then is delivered to the CSN along opposite path from MSS and reaches end subscriber.
When MSS may move to the area of coverage of another BS from the area of coverage of a BS in moving process, and serving BS broadcasts and target BS be when belonging to same ASN GW, and the switching of generation is called R6 interface mobility and switches; Move to the area of coverage of BS2 from the area of coverage of BS1 as MSS among Fig. 1.When serving BS broadcasts and target BS belonged to different ASN GW, the switching of generation was called the Interface R4 mobility and switches; Move to the area of coverage of BS3 from the area of coverage of BS2 as MSS among Fig. 1. when anchor ASN GW changed, the switching of generation was called the Interface R3 mobility and switches; Having moved on on the ASN GW2 from ASN GW1 as anchor ASN GW among Fig. 1. the initiator of switching can be MSS, also can be network side BS or ASN GW.
Message flow between the service quality of WiMAX network (QoS) logic entity is as shown in Figure 2: management service flow (SFM) is arranged in BS, service flow mandate (SFA) is usually located among the ASN GW. in RR Request between SFA and SFM and the RR Response message, carry cell Dot16 ServiceFlow ID (SFID, be the service flow sign), SFID takies 4 bytes, be used for identifying a unidirectional service flow that possesses qos parameter, this sign remains unchanged when MSS switches in Network Access Provider (NAP).
Regulation SFID is used for identifying a unidirectional Business Stream between SFA and SFM in WiMAX NWG standard (up-to-date 050915NWG STAGE2.doc), and its span is 0～2
32SFID is unique in NAP, and MSS switches, and this SFID of maintenance is constant in the back. because travelling carriage may switch on other entities that distribute outside the SFID in carrying out business procedure, when Business Stream after finishing on these entities, distribute the entity of SFID can not know in time that travelling carriage has not re-used the SFID of distribution, cause and distribute the entity of SFID can not in time discharge and reclaim this SFID, under the big situation of Business Stream quantity, may cause the SFID resource exhaustion, can't provide service for new access user.
Summary of the invention
The invention provides a kind of method and device that in the WiMAX network, reclaims the service flow sign, in carrying out business procedure, switch the problem that the entity that makes the distribution service traffic identifier can not in time reclaim service identification because of travelling carriage to solve prior art.
The invention provides following technical scheme:
A kind of method that in the WiMAX network, reclaims the service flow sign, described service flow sign (SFID) service flow of unique identification in the network of Network Access Provider; After the end service flow, comprise the steps:
Whether A, the current SFID that provides the entity of service flow to judge the service flow that finishes for travelling carriage are distributed by this entity, if, then SFID is changed to upstate, otherwise, carry out step B and step C;
B, the current entity of service flow that provides for travelling carriage send the message that discharges SFID to the entity that distributes described SFID;
C, distribute the entity of described SFID to receive described message after, the service flow sign of appointment in the message is changed to upstate; Wherein,
For after travelling carriage distributes SFID, in the context of travelling carriage, will distribute the sign of entity of SFID related with SFID; And after travelling carriage finished service flow, the current entity that service flow is provided for travelling carriage obtained the entity identification of SFID correspondence from this context.
Distributed by a plurality of other entities if finish a plurality of service flow and service flow sign, then other distribute the entity of SFID to send described message to each respectively.
The entity of distribution SFID also returns response message to the entity that sends this message after receiving described message.
Described release SFID message comprises the SFID tabulation that mobile station identification, event identifier and needs discharge.
Described response message comprises mobile station identification, Transaction Identifier and release result.
Currently be: access service network gateway (ASN GW), base station (BS), service flow mandate (SFA) entity, management service flow (SFM) entity or external server for travelling carriage provides the entity of service flow.
A kind of device that is used for the WiMAX network comprises:
Memory module is used for the context of storing mobile station, comprises the sign of device of distribution services traffic identifier (SFID) and the incidence relation of SFID in this context;
Identification module is used for that the context according to described memory module is defined as the device that this service flow is distributed SFID when finishing service flow;
Notification module is used for determining that at described identification module by other devices outside the device be the service flow that finishes when distributing SFID, sends the message that discharges SFID to these other device.
Described device is access service network gateway (ASN GW), base station (BS), service flow mandate (SFA) entity, management service flow (SFM) entity or external server.
When the present invention finishes at Business Stream, distribute the entity of SFID for travelling carriage provides the entity notice of service, make SFID can access timely recovery, can effectively prevent the SFID resource exhaustion by current.
Description of drawings
Fig. 1 is a WiMAX network architecture system schematic diagram in the prior art;
Fig. 2 is the message flow schematic diagram between service flow mandate and the management service flow in the prior art;
The entity schematic diagram that Fig. 3 relates to for distribution services traffic identifier (SFID) in the prior art;
Fig. 4 reclaims the Signalling exchange schematic diagram of SFID for notice between the SFA among the present invention;
Fig. 5 is that travelling carriage is realized the flow chart that SFID reclaims after finishing service flow among the present invention;
Fig. 6 is the structural representation of SFA entity among the present invention.
Embodiment
Service flow sign (SFID) is used between service flow mandate (SFA) and management service flow (SFM), and its span is 0～2
32Be used for identifying a unidirectional Business Stream .SFID assigning process as shown in Figure 3: travelling carriage (MSS) initiates to create a service flow (service flow) request in service (serving) network, when the SFA (Serving SFA) of service received resource reservation request (RR-Request), the SFA of service (Serving SFA) was 0～2
32Distribute the SFID of the sequence number N of a free time in the scope this MSS as this service flow, this SFID at the Network Access Provider (NAP) of WiMAX if in unique. this MSS has a plurality of service flow (service flow) to need to create, perhaps another one MSS also needs to create service flow (service flow), and SFA is then 0～2
32Select a plurality of different idle sequence numbers in the scope as SFID, and corresponding one by one with each service flow (service flow), that is, and the SFID. that the different service flow of different MS S (service flow) are corresponding different
After MSS switches, MSS has moved to target (Target) SFA from the SFA of service, this moment, SFID passed to target SFA (TargetSFA) by the MSS context from the SFA (Serving SFA) that serves, and this SFID uses its corresponding service flow (service flow) always to be finished.
The present invention is in order in time to reclaim corresponding SFID after finishing service flow at MSS, for by the current SFID that provides the SFA of service to distribute for MSS, then directly it is changed to upstate, SFID for being distributed by other SFA then distributes the SFA of this SFID to discharge corresponding SFID. by message informing
For providing the SFA of service can be included in to travelling carriage, travelling carriage provides in access service network gateway (ASN GW), base station (BS), service flow mandate (SFA) entity, management service flow (SFM) entity or the external server of service flow.
In the network of WiMAX, newly-increased SFID discharges request (SFID Release Request) and SFID discharges response (SFID Release Response) message. consult shown in Figure 4, the current SFA2 of service that provides for MSS sends SFID Release Request message to the SFA1 that distributes SFID, and SFA1 sends SFID Release Response message to SFA2. and the cell that message is carried is as shown in the table:
| Message | Cell |
| SFID Release Request | MS ID，Transaction ID，list of SFID |
| SFID Release Response | MS ID，Transaction ID，Success/Failure |
Wherein: MS ID is the sign of travelling carriage (MSS); Transaction ID is a transaction number, is used for and the response message correspondence; The SFID tabulation of list of SFID for needing to reclaim.
After the SFA that distributes SFID receives SFID Release Request message, all SFID in the SFID tabulation of carrying in the message are changed to the free time, (service flow) reuses for the service flow of distributing to other; Distribute the SFA of SFID to return response message SFID ReleaseResponse. for the SFA that sends message simultaneously
In order to make the SFA that sends SFID release request can find the position of the SFA that distributes SFID, in the MSS context, add cell " Entity ID allocating SFID ", an example is as follows:
MS NAI
MS MAC Address
Anchor ASN GW associated with the MS
List of Service Flow IDs with associated：
SF Classifiers
SF QoS
CID(associated with the SFID)
Data Path tagging(ID)Information
The entity identification of Entity ID allocating SFID // distribution SFID
Etc.
R3 related information
Home Agent IP address
CoA
DHCP Server
AAA Server
R3 status Details(TBD)
Security Information
Security information related to PKMv2
Security information related to Proxy MIP(if used)
By the Entity ID allocating SFID in the MSS context, SFA just can find the position of distributing each entity of SFID into MSS.
Consult shown in Figure 5ly, after travelling carriage is finished service flow, realize that the step that SFID reclaims is as follows:
Whether step 100, the current SFA that service is provided for travelling carriage are distributed by this entity according to the traffic stream identifier of the context determination travelling carriage of MSS, if, then carry out step 110, otherwise, carry out step 120.
If it is the SFID that travelling carriage distributes that a plurality of other SFA entities are arranged, then distributes the SFA entity of SFID to send SFID to each respectively and discharge request message.
The SFA of step 140, distribution SFID is to sending the SFA transmission SFID release response message (SFID Release Response) that SFID discharges request message.
Accordingly, a kind of result of SFA entity comprises memory module, identification module and notification module as shown in Figure 6; Wherein:
Memory module is used for the context of storing mobile station, comprises the sign of SFA of distribution services traffic identifier (SFID) and the incidence relation of SFID in this context.
Identification module is used for being defined as according to the context of described memory module the SFA. of this service flow distribution SFID when finishing service flow
Notification module is used for determining that at described identification module by other SFA entities outside this SFA entity be the service flow that finishes when distributing SFID, sends the message that discharges SFID to the SFA that distributes SFID.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention. like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. one kind is reclaimed the method that service flow identifies in the WiMAX network, described service flow sign SFID service flow of unique identification in the network of Network Access Provider; It is characterized in that, finish to comprise the steps: after the service flow
Whether A, the current SFID that provides the entity of service flow to judge the service flow that finishes for travelling carriage are distributed by this entity, if, then SFID is changed to upstate, otherwise, carry out step B and step C;
B, the described current entity of service flow that provides for travelling carriage send the message that discharges SFID to the entity that distributes described SFID;
C, distribute the entity of described SFID to receive described message after, the service flow sign of appointment in the message is changed to upstate; Wherein,
For after travelling carriage distributes SFID, in the context of travelling carriage, will distribute the sign of entity of SFID related with SFID; And after travelling carriage finished service flow, the current entity that service flow is provided for travelling carriage obtained the entity identification of SFID correspondence from this context.
2. the method for claim 1 is characterized in that, if a plurality of service flow of end and service flow sign are distributed by a plurality of other entities, then other distribute the entity of SFID to send described message to each respectively.
3. the method for claim 1 is characterized in that, the entity of distribution SFID also returns response message to the entity that sends this message after receiving described message.
4. method as claimed in claim 3 is characterized in that, described release SFID message comprises the SFID tabulation that mobile station identification, event identifier and needs discharge.
5. method as claimed in claim 4 is characterized in that, described response message comprises mobile station identification, Transaction Identifier and release result.
6. as each described method of claim 1-5, it is characterized in that, currently be: access service network gateway ASN GW, base station BS, service flow mandate SFA entity, management service flow SFM entity or external server for travelling carriage provides the entity of service flow.
7. a device that is used for the WiMAX network is characterized in that, comprising:
Memory module is used for the context of storing mobile station, comprises the sign of device of distribution services traffic identifier SFID and the incidence relation of SFID in this context;
Identification module is used for that the context according to described memory module is defined as the device that this service flow is distributed SFID when finishing service flow;
Notification module is used for determining that at described identification module by other devices outside this device be the service flow that finishes when distributing SFID, sends the message of release SFID to these other device.
8. device as claimed in claim 7 is characterized in that, described device is access service network gateway ASN GW, base station BS, service flow mandate SFA entity, management service flow SFM entity or external server.
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| CN102387604B (en) * | 2010-08-30 | 2014-04-30 | 鸿富锦精密工业（深圳）有限公司 | Client device and method for recovering network connection thereof |
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| CN1653748A (en) * | 2002-05-18 | 2005-08-10 | Lg电子株式会社 | Selective service method in multicast system |
| WO2005086380A1 (en) * | 2004-03-05 | 2005-09-15 | Samsung Electronics Co., Ltd. | Service flow management method of mobile subscriber station in a mobile broadband wireless access system |
| WO2005084146A2 (en) * | 2004-03-05 | 2005-09-15 | Lg Electronics Inc. | Mobile broadband wireless access system for transferring service information during handover |
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| WiMAX系统QoS机制研究. 李茗，彭木根，王文博.现代电信科技，第7期. 2005 |
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