CN1859285A - Method for equalizing load between gateways of WiMAX access service network - Google Patents
Method for equalizing load between gateways of WiMAX access service network Download PDFInfo
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Abstract
The present invention relates to WiMAX accessing service network technique, especially referring to gateway load equalization method in WiMAX accessing service network. It contains Service gateway receiving access request message and executing as follows steps: service gateway obtaining correlation gateway resource state, selecting lesser load one gateway as target gateway, if selected gateway being service gateway itself then service gateway processing said access request otherwise transmitting said access request message to target gateway. The present invention in time adjusts each correlation gateway load, balancing load, raising system efficiency, and ensuring system normal operation.
Description
[technical field]
The present invention relates to WiMAX access service network technology, particularly the method for equalizing load between gateways in the WiMAX access service network.
[background technology]
Along with the extensive use of the flourish and wireless network of internet service, the WiMAX system has obtained a large amount of application and concern with its good wireless access characteristic.How the WiMAX system is applied to the mobile subscriber, better provides Packet Service between network and the mobile subscriber to transmit or the function of route becomes the new focus of industry research.
WiMAX network architecture system as shown in Figure 1.Wherein, ASN (access service network) is defined as the network function set that the wireless access service is provided for the WiMAX terminal, and ASN has comprised base station (BS) and access service network gateway (ASN-GW) network element.CSN (connectivity serving network) is defined as to the WiMAX terminal IP is provided Connection Service.MSS (mobile subscriber station) is a mobile subscriber equipment, and SS (subscriber station) is a subscriber equipment, and the user uses this devices accessing WiMAX network.CSN is the network equipment of the NSP (Network Service Provider Internet Service Provider) that belongs to, and an ASN can connect a plurality of CSN.Can be that multi-to-multi connects between BS and the ASN-GW, in Fig. 1, ASN-GW1 can connect BS1 and BS2 simultaneously, and BS1 can be connected on ASN-GW1 and the ASN-GW2 simultaneously.
MSS/SS inserts the BS that uses and is called serving BS (Serving BS).For the MSS/SS that uses certain serving BS broadcasts to insert, and the ASN-GW of R6 interface is arranged between this BS, be called gateway (ServingASN-GW), for example ASN-GW1 just is to use the gateway of the MSS/SS that BS1 or BS2 insert among Fig. 1.Provide the ASN-GW of the Interface R3 between the R3 of the HA from ASN to CSN to be called anchor ASN-GW (AnchorASN-GW).Anchor ASN-GW among Fig. 1 is a logic entity, and the logic entities such as ASN-GW1, ASN-GW2 among itself and Fig. 1 may reside in the identical or different physical entity.When anchor ASN-GW was present in the identical physical entity with service ASN-GW, interface between the two belonged to the device interior interface, not necessarily will use the standard Interface R4.
From data surface, the grouping busihess data of descending MSS/SS newspaper, is sent among the ASN by the Interface R3 between the anchor ASN-GW HA and the ASN from the HA (home agent) of CSN.After the grouping busihess data newspaper of descending MSS/SS enters ASN, be sent to the service ASN-GW of MSS/SS through the Interface R4 of ASN inside, and send on the MSS/SS through the R6 interface between inner ASN-GW of ASN and the BS and the R1 interface between BS and the MSS/SS data MSS/SS by service ASN-GW.Upstream data then is delivered to the CSN along opposite path from MSS/SS and reaches end subscriber.As mentioned above, the data path (Data Path) that corresponding uplink and downlink is all arranged for each Business Stream of each MSS/SS in the interface of ASN inside, these all can be set up according to the qos requirement of each Business Stream and the employing mode of data path when each Business Stream is set up.When this service ending, when just Business Stream is ended, just need to discharge corresponding data path.
When MSS/SS 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.When MSS/SS 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 different ASN GW, and the switching of generation is called the Interface R4 mobility and switches.As shown in Figure 2, before Interface R4 takes place switching, MSS/SS uses the BS2 access network, and the link by overstriking is connected to CSN.As shown in Figure 3, after the generation Interface R4 switched, MSS/SS used the BS3 access network, and MSS/SS is connected to CSN by the link of overstriking.Can see that MSS/SS carries out data by new service ASN-GW and the Interface R4 data path between the anchor ASN-GW and transmits.The Interface R4 switching flow as shown in Figure 4.
A plurality of ASN-GW are generally all arranged in the ASN, how to carry out load balancing between each ASN-GW and just become the problem that needs solve.The patent No. is 200510064665.X, the application name is called in the patent of " a kind of network optimized approach based on distributed wireless access network ", the selection of ASN-GW is undertaken by BS: GW carries out periodic resources broadcasting to BS, and while BS also can measure the time delay information with certain GW path.The weak point of this way is: 1. BS is in the edge of network, can't fully understand the resource situation of each ASN-GW in the whole network, so effect of load balance must be affected; 2. increased the weight of the processing burden of BS; 3. the quantity of BS is much larger than ASN-GW in the network, and the resource broadcast that ASN-GW issues can take more system resources; 4. there is not the intercommunication resource status between the ASN-GW, like this, in Interface R4 switches, when service ASN-GW needs select target ASN-GW, because service ASN-GW does not know the resource status of a plurality of ASN-GW that target BS connects, can't be according to resource status select target ASN-GW, to reach the purpose of load balancing.
[summary of the invention]
The object of the present invention is to provide in a kind of balanced WiMAX access service network the method for load between each gateway.
The method of equalizing load between gateways in the WiMAX access service network, gateway receive to insert carries out following steps behind the request message:
101, gateway obtains the resource status of associated gateway, selects a less gateway of load as intended gateway, if selected gateway is a gateway itself, then gateway is handled described access request, otherwise described access request message is forwarded to intended gateway.
The method of equalizing load between gateways in the WiMAX access service network, further comprise step before the execution in step 101: described gateway judges whether to obtain the resource status of associated gateway, if do not obtain, then request obtains the resource status of associated gateway.
The method of equalizing load between gateways in the WiMAX access service network, the method for described acquisition associated gateway resource status comprises step:
301, gateway sends the resource status request message to described associated gateway, comprises gateway own resource state in the described resource status request message;
302, described associated gateway is returned the resource status response message to gateway, carries himself resource status.
The method of equalizing load between gateways in the WiMAX access service network, fixed time broadcast sends the resource status broadcasting packet between gateway, and gateway obtains the resource status of associated gateway by described resource status broadcasting packet.
The method of equalizing load between gateways in the WiMAX access service network, execution in step 101 takes a step forward and comprises step: gateway judges whether the own resource occupancy has reached threshold value, if arrive, then execution in step 101, otherwise handle described access request.
Described resource status comprises one of following content at least: user capacity resource, bandwidth resources, path transmission delay and the error rate, processor resource, memory resource, inbound port resource and outbound port resource.
Described access package includes network is initial to be inserted and the switching access.
Described associated gateway is the gateway that is connected with gateway, or the base station of its management also serviced gateway management simultaneously, or the base station of its management and serving BS have adjacent sub-district.
As an improvement of the present invention, described gateway increases by a hop count parameter in message when transmitting the access request to intended gateway, message whenever is forwarded once, the value of described hop count adds one, when described hop count reaches a preset value, setting the current service gateway is final IAD, handles described access request.
The present invention also provides the method for equalizing load between gateways in a kind of WiMAX access service network, and fixed time broadcast sends the resource status broadcasting packet between gateway, obtains the resource status of associated gateway; When gateway judgement self load reaches threshold value, initiatively send and require handoff request to serving BS, require serving BS that the certain customers station is switched in the continuous base station of associated gateway.
In the said method, the described requirement comprises one of following content or combination in the handoff request message: the percentage of recommending intended gateway tabulation, switching mobile subscriber station.
Said method further comprises: mobile subscriber station sends to serving BS and switches indication, comprises the information of selected intended gateway in the described switching indication.
The present invention in time adjusts the load of each associated gateway by allowing in the WiMAX access service network intercommunication resource user mode between each associated gateway, balanced well load, and the assurance system runs well, and improves system effectiveness.
[description of drawings]
Fig. 1 is WiMAX network architecture system figure.
Fig. 2 is the employed Data Link Map of MSS/SS before Interface R4 switches.
Fig. 3 is that Interface R4 switches the employed Data Link Map of back MSS/SS.
Fig. 4 is an Interface R4 switching flow schematic diagram.
Fig. 5 is the schematic flow sheet of the embodiment of the invention one.
Fig. 6 is the schematic flow sheet of the embodiment of the invention two.
Fig. 7 is the schematic flow sheet of the embodiment of the invention three.
[embodiment]
The present invention is further elaborated with specific embodiment with reference to the accompanying drawings below.
Embodiment one:
Each gateway (ASN-GW) periodically sends the resource status request message to each relevant ASN-GW in the access service network (ASN), broadcast its resource and loading condition, carry one of following information or combination in any in the described message: user capacity resource status, bandwidth resources state, path transmission delay and the error rate, processor resource state, memory resource state, inbound port resource status and inbound port resource status etc.Can relate to particularly: the user capacity resource usage ratio of ASN-GW, total user capacity of ASN-GW, the customer volume that ASN-GW has inserted, the remaining users capacity of ASN-GW, the customer volume that ASN-GW uses certain QoS rank to insert, the bandwidth resources usage ratio of ASN-GW, the total bandwidth of ASN-GW is held, the remaining bandwidth of ASN-GW, the bandwidth that ASN-GW has used, path transmission delay between ASN-GW and the BS, path transmission error rates between ASN-GW and the BS, ASN-GW processor resource occupancy, ASN-GW processor total resources, the ASN-GW processor has used resource, ASN-GW processor surplus resources, ASN-GW memory resource occupancy, ASN-GW memory total resources, the ASN-GW memory has used resource, ASN-GW memory surplus resources, ASN-GW inbound port resources occupation rate, ASN-GW inbound port total flow, the ASN-GW inbound port is use traffic, ASN-GW inbound port residual flow, ASN-GW outbound port resources occupation rate, ASN-GW outbound port total flow, the ASN-GW outbound port is use traffic and ASN-GW outbound port residual flow.
As shown in Figure 5, be the schematic flow sheet that mobile subscriber station (MSS) request initial network inserts, mainly may further comprise the steps:
S11, service ASN-GW receive from serving BS broadcasts or from the MSS access of other ASN-GW and ask.
S12, service ASN-GW judges whether its other resources occupancy has reached threshold value, if do not reach threshold value, execution in step S17 then; If reach, execution in step S13 then.
S13, service ASN-GW judges whether this serving BS broadcasts also has annexation with other ASN-GW, if having, and this ASN-GW has obtained the resource status of these neighboring ASs N-GW, then execution in step S14 by broadcasting; If no, execution in step S17 then.Because each gateway adopts periodic broadcasting to obtain the associated gateway resource situation in the present embodiment, therefore when receiving the access request, needn't go to obtain the associated gateway resource again, as long as use the last result who obtains that broadcasts.
S14, service ASN-GW judges whether the own resource occupancy is minimum, if not execution in step S15; If, execution in step S17.
S15 selects the lightest ASN-GW of load as intended gateway in relevant ASN-GW, the access request of MSS is transmitted to selected ASN-GW, and the forwarding jumping figure in the message is increased by 1.
S16, selected target ASN-GW judge whether transmit jumping figure arrives preset value, if arrive execution in step S17, if there is not execution in step S12 as the access request of gateway reception MSS.
S17 as the access request of final gateway processing MSS, finishes follow-up access and handles.
As an improvement of the present invention,, increased above-mentioned forwarding jumping figure in the access request message of forwarding in order to prevent the above-mentioned access request of unconfined mutual forwarding between the ASN-GW.The request of access whenever is forwarded once, transmits jumping figure and is all added 1, then no longer transmits after jumping figure reaches a preset value when transmitting, and inserts MSS by last ASN-GW.This preset value can be used as the operation parameter in the unified configuration of whole network.
Embodiment two:
As shown in Figure 6, be that gateway receives the schematic flow sheet from the MSS handoff request of other service ASN-GW, mainly may further comprise the steps:
S21, ASN-GW receive from serving BS broadcasts or from the MSS handoff request of other ASN-GW, comprise target BS information in this handoff request.
S22, ASN-GW judge whether to obtain the resource status of associated gateway, if obtain, and execution in step S23; If do not obtain, then request obtains the resource status of associated gateway, execution in step S23 again.Wherein, associated gateway is meant the ASN-GW that annexation is arranged with target BS.Therefore because from having carried target BS information in serving BS broadcasts or the handoff request, can obtain the information of the ASN-GW that is connected with target BS by certain method from other service ASN-GW.The definition of described resource status is identical with embodiment one.
S23, ASN-GW judge whether the own resource occupancy is minimum, if not execution in step S24; If, execution in step S26.
S24 selects the lightest ASN-GW of load as intended gateway in relevant ASN-GW, will be transmitted to selected ASN-GW from the handoff request of MSS, and the forwarding jumping figure in the message is increased by 1.
S25, selected target ASN-GW receives the handoff request of MSS, judges whether transmit jumping figure arrives preset value, if arrive execution in step S26, if there is not execution in step S22.
S26 as the handoff request of final gateway processing MSS, finishes follow-up access and handles.
Among the above-mentioned steps S22, the method that request obtains the associated gateway resource status comprises step:
S221, ASN-GW send the resource status request message to described associated gateway, comprise himself resource status in its resource status request message.
S222, associated gateway is returned the resource status response message to above-mentioned ASN-GW, comprises the resource status of associated gateway in the returned packet.
As can be seen, relative embodiment one, the present embodiment load between more can each gateway of balance.Simultaneously, continuous balanced load also can increase system burden between each gateway.Therefore also can be identical with embodiment one, behind step S21, increase step:
S211, ASN-GW judge whether its other resources occupancy has reached threshold value, if reach, and execution in step S22; If no, execution in step S26 then.
Like this, have only the load of an ASN-GW to arrive the ASN-GW that just later load (MSS/SS) can be distributed to other after the threshold value.
Present embodiment also can equally remove step S22 with embodiment, adopts periodic broadcasting to obtain associated gateway resource and load condition.
Embodiment three:
In the present embodiment, each gateway (ASN-GW) periodically sends the resource status broadcasting packet to each relevant ASN-GW in the access service network (ASN), broadcasts its resource and loading condition, to obtain the resource status of associated gateway.Described associated gateway is meant such gateway, and it is connected with source ASN-GW, and the BS of its management is also managed by source ASN-GW simultaneously, or the BS of the BS of its management and source ASN-GW management has neighbor cell.ASN-GW can satisfy relevant ASN-GW defined above to all and send the resource status request message, also can only select its subclass to send.The definition of described resource status is identical with embodiment one.
Service ASN-GW wishes to reduce the occupation proportion of own resource owing to reasons such as Operation and Maintenance, or find that own resource has reached threshold value, and the load that also has among the neighboring AS N-GW is low weight, so ASN-GW initiatively initiates switching flow, send handoff request to serving BS broadcasts, require serving BS broadcasts that part MSS is switched in the continuous BS of other ASN-GW.As shown in Figure 7, be that gateway is initiatively initiated the schematic flow sheet that switches, mainly may further comprise the steps:
S31, service ASN-GW judges whether the own resource occupancy has reached threshold value, if reach, if execution in step S32 is not then continue judgement.
S32, service ASN-GW decision is transferred to sub-load among the relevant ASN-GW, selects relevant ASN-GW to form and recommends the intended gateway tabulation.
S33, service ASN-GW initiatively send to serving BS broadcasts and require handoff request, require serving BS broadcasts that part MSS is switched among the relevant ASN-GW, and this requires to comprise in the handoff request target ASN-GW tabulation of recommendation and the percentage that switches mobile subscriber station.
S34, serving BS broadcasts receives the described handoff request that requires, and need to determine the MSS of switching, sends handoff request to it;
S35, MSS initiates to switch indication to serving BS broadcasts.
S36 after serving BS broadcasts is received described switching indication, selects one as target ASN-GW in the target ASN-GW of described recommendation tabulation, and the information of described intended gateway added to switch sends to service ASN-GW in the indication.
S37, service ASN-GW send the switching indication to the above-mentioned target ASN-GW that chooses after receiving the switching indication of serving BS broadcasts transmission.
S38, the beginning switching flow.
In sum, the inventive method can in time be adjusted the load of each associated gateway, equally loaded well, and the assurance system runs well, and improves system effectiveness.
Claims (12)
1, the method for equalizing load between gateways in the WiMAX access service network is characterized in that gateway receives to insert to carry out following steps behind the request message:
101, gateway obtains the resource status of associated gateway, selects a less gateway of load as intended gateway, if selected gateway is a gateway itself, then gateway is handled described access request, otherwise described access request message is forwarded to intended gateway.
2, method according to claim 1, it is characterized in that further comprising step before the execution in step 101: described gateway judges whether to obtain the resource status of associated gateway, if do not obtain, then request obtains the resource status of associated gateway.
3, method according to claim 1 and 2 is characterized in that the method for described acquisition associated gateway resource status comprises step:
301, gateway sends the resource status request message to described associated gateway, comprises gateway own resource state in the described resource status request message;
302, described associated gateway is returned the resource status response message to gateway, carries himself resource status.
4, method according to claim 3 is characterized in that: fixed time broadcast sends the resource status broadcasting packet between gateway, and gateway obtains the resource status of associated gateway by described resource status broadcasting packet.
5, method according to claim 1, it is characterized in that execution in step 101 takes a step forward and comprise step: gateway judges whether the own resource occupancy has reached threshold value, if arrive, then execution in step 101, otherwise handles described access request.
6,, it is characterized in that described resource status comprises one of following content at least: user capacity resource, bandwidth resources, path transmission delay and the error rate, processor resource, memory resource, inbound port resource and outbound port resource according to claim 1 or 2 or 5 described methods.
7, method according to claim 1 is characterized in that: described access package includes network is initial to be inserted and the switching access.
8, method according to claim 1 and 2 is characterized in that: described associated gateway is the gateway that is connected with gateway, or the base station of its management also serviced gateway management simultaneously, or the base station of its management and serving BS have adjacent sub-district.
9, method according to claim 1, it is characterized in that further comprising: described gateway increases by a hop count parameter in message when transmitting the access request to intended gateway, message whenever is forwarded once, the value of described hop count adds one, when described hop count reaches a preset value, setting the current service gateway is final IAD, handles described access request.
10, the method for equalizing load between gateways in the WiMAX access service network is characterized in that: fixed time broadcast sends the resource status broadcasting packet between gateway, obtains the resource status of associated gateway; When gateway judgement self load reaches threshold value, initiatively send and require handoff request to serving BS, require serving BS that the certain customers station is switched in the continuous base station of associated gateway.
11, method according to claim 10 is characterized in that described the requirement comprises one of following content at least in the handoff request message: the percentage of recommending intended gateway tabulation, switching mobile subscriber station.
12, method according to claim 11, it is characterized in that further comprising: after serving BS receives the switching indication of mobile subscriber station, selected target gateway in the tabulation of described recommendation intended gateway, and the information of described intended gateway added to switch in the indication send to gateway.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101011733A CN1859285A (en) | 2005-11-05 | 2005-11-05 | Method for equalizing load between gateways of WiMAX access service network |
| CN2006101438983A CN101009640B (en) | 2005-11-05 | 2006-11-03 | Service forwarding method between the gateways in the service network and its service gateway |
| PCT/CN2006/002968 WO2007051428A1 (en) | 2005-11-05 | 2006-11-06 | A method and serving gateway for the service forwarding between the gateways in the serving network |
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| CNA2005101011733A CN1859285A (en) | 2005-11-05 | 2005-11-05 | Method for equalizing load between gateways of WiMAX access service network |
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| WO (1) | WO2007051428A1 (en) |
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| WO2008116389A1 (en) * | 2007-03-27 | 2008-10-02 | Alcatel Lucent | Method and device for session route selecting |
| WO2009043276A1 (en) * | 2007-09-27 | 2009-04-09 | Huawei Technologies Co., Ltd. | Method for providing load information |
| WO2010102574A1 (en) * | 2009-03-11 | 2010-09-16 | Huawei Technologies Co., Ltd. | System and method for initial gateway selection |
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| CN103202002A (en) * | 2010-09-08 | 2013-07-10 | 思杰系统有限公司 | Systems and methods for self-load balancing access gateways |
| CN102457393A (en) * | 2010-10-29 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Data transmission management equipment and method |
| CN102480752A (en) * | 2010-11-23 | 2012-05-30 | 中兴通讯股份有限公司 | Method and system capable of supporting R6 link hot backup |
| CN102355698B (en) * | 2011-09-28 | 2015-03-25 | 华为技术有限公司 | Communication method based on base station control device group, device and system |
| CN102355698A (en) * | 2011-09-28 | 2012-02-15 | 华为技术有限公司 | Communication method based on base station control device group, device and system |
| CN104038525A (en) * | 2013-03-07 | 2014-09-10 | 深圳市金证科技股份有限公司 | Load balancing method of server system and apparatus |
| CN104038525B (en) * | 2013-03-07 | 2018-01-12 | 深圳市金证科技股份有限公司 | The load-balancing method and device of server system |
| CN108667742A (en) * | 2018-08-15 | 2018-10-16 | 南京国电南自轨道交通工程有限公司 | A kind of comprehensive monitoring system Network Load Balance gateway communication method |
| CN108667742B (en) * | 2018-08-15 | 2022-05-10 | 南京国电南自轨道交通工程有限公司 | Network load balancing gateway communication method of comprehensive monitoring system |
| CN111245913A (en) * | 2020-01-06 | 2020-06-05 | 深圳壹账通智能科技有限公司 | Message sending method and device based on gateway, computer equipment and storage medium |
| CN113271327A (en) * | 2020-02-17 | 2021-08-17 | 西安理邦科学仪器有限公司 | Networking method and device of central monitoring system and medical equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2007051428A1 (en) | 2007-05-10 |
| WO2007051428A8 (en) | 2007-07-19 |
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