CN101212711A - Load adjusting method, network, and base station controller - Google Patents
Load adjusting method, network, and base station controller Download PDFInfo
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- CN101212711A CN101212711A CNA2006100646616A CN200610064661A CN101212711A CN 101212711 A CN101212711 A CN 101212711A CN A2006100646616 A CNA2006100646616 A CN A2006100646616A CN 200610064661 A CN200610064661 A CN 200610064661A CN 101212711 A CN101212711 A CN 101212711A
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Abstract
The invention provides a method for realizing a load adjustment, which detects whether signals can reach each MSC in a MSC pool in a mobile switching center; provided that the signals can not reach, the corresponding relationship of a user facility UE and each MSC in the MSC pool are modified. The UE is allotted and accessed according to the modified corresponding relationship. The invention also provides a base station controller and a network for realizing the load adjustment. The method for realizing a load adjustment effectively solves the problem of the load adjustment in the MSC pool of an A-Flex circuit switched domain.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of realization load adjustment method, network and base station controller.
Background technology
Iu-Flex (Iu interface flexibility) mechanism is one of circuit domain disaster tolerance mechanism under the present existing soft-exchange construction.
(Third Generation Partnership Project is 3GPP) with the Iu-Flex characteristic standardization for 3G (Third Generation) Moblie standard partner program.Wherein defined the notion of " pond (Pool) ", comprise among the Pool a plurality of radio network controllers (Radio network controller, RNC) and a plurality of core net (each RNC wherein can connect a plurality of CN nodes for Corenetwork, CN) node.Under the normal condition, Iu-Flex mechanism is by Internet resources indication (Network Resource Identification, NRI) mode guarantees, as certain subscriber equipment (User Equipment, when UE) roaming in the area of RNC management in the pond, all CN processing procedures are handled on the specific CN node in the pond, promptly for single UE, it has only the CN node of " ownership " in the pond, this mode can avoid frequent position to upgrade; All UE are divided into different " ownership " CN nodes in the pond, so be load sharing, this division to " ownership " CN node in the UE pond, should be when UE registers in this pond for the first time, decide by RNC, the mode of decision is by IMSI International Mobile Subscriber Identity (International MobileSubscriber Identity, IMSI)-Hash (HASH) algorithm finishes distribution, UE is registered to specific CN node, this CN node returns NRI to UE after finishing registration, this NRI includes this CN nodal information.(Non access stratum NAS) has NRI to follow-up UE all Non-Access Stratums in the pond in the message, send it to " ownership " CN node by RNC according to NRI.
As shown in Figure 1, there is A-Flex (A interface flexibility) mechanism in similar Iu-Flex mechanism at the CDMA2000 wireless core network.In the network that adopts A-Flex mechanism, (the MobileSwitch Center of arbitrary mobile switching centre, MSC) all base station controllers (Base Station Control and in the pond, BSC) link to each other, the UE that each sub-district in the pond is inserted can be handled by the arbitrary MSC in the pond, insert the distribution of UE between MSC, reaction be exactly the load of each MSC.
Because the CDMA2000 network do not support the TMSI allocation flow at present, just can't shine upon attaching relation between UE and the MSC for each UE distribution NRI.In the prior art, BSC selects MSC according to UE feature keyword IMSI.Wherein a kind of implementation: BSC distributes to each MSC carrying with UE, the method of salary distribution can adopt HASH algorithm (IMSI/10) mod M, the result of calculation value of HASH function is 0～M-1, the UE that is whole POOL service just has been divided into M group---user's piece, and system adopts " corresponding relation of user's piece and MSC " balancedly these user's pieces to be distributed to each MSC.
BSC safeguards " corresponding relation of user's piece and MSC ", can adopt following form:
| The HASH value of IMSI (user's piece) | MSCID |
| 000 | MSC0 |
| 001 | MSC1 |
| 002 | MSC2 |
| ...... | ...... |
| 123 | MSC1 |
| ...... | ...... |
| M-1 | MSCi |
BSC handles by the MSC that " corresponding relation of user's piece and MSC " is distributed in the pond inserting UE.BSC is according to the feature keyword IMSI that inserts UE, adopt HASH algorithm (IMSI/10) mod M to calculate the HASH value of this UE correspondence, with this HASH value is keyword visit " corresponding relation of user's piece and MSC ", obtains handling the MSC sign of this UE, and the service request of this UE is distributed to this MSC.
But in the A-Felx of prior art networking, because during certain reason paralysis machine, the load of a nature is adjusted mode and is carried out the adjustment of craft load exactly as a certain MSC.But manual load adjustment does not possess real-time, and will increase the maintenance cost of man power and material aspect; The more important thing is the maintenance process complexity, the attendant of CN side network management system and RAN side network management system operate miss occurs probably in the co-operation process, will cause the failure of the heavy assigning process of whole load, reduce the quality that load heavily distributes, thereby introduced serious consequence.
Therefore, also can't solve load adjustment problem in the MSC pond in the prior art effectively.
Summary of the invention
In view of this, the invention provides under a kind of A-Flex circuit domain and realize load adjustment method, network and base station controller, to solve the self-adjusting problem of loading in the MSC pond in the A-Flex circuit domain.
In order to realize the foregoing invention purpose, one embodiment of the present of invention provide a kind of realization load adjustment method,
Whether signaling can reach each MSC in the detection moving exchanging center MSC pond, if signaling is unreachable, then revises the corresponding relation between each MSC in user equipment (UE) and the MSC pond, distributes according to amended corresponding relation and inserts UE.
One embodiment of the present of invention provide a kind of network of realizing loading and adjusting, and comprise MSC and BSC, and a BSC links to each other with a plurality of MSC, also comprises:
Detecting unit, whether signaling can reach to be used to detect each MSC;
Processing unit is used for if signaling is unreachable, then revises the corresponding relation between UE and each MSC;
Adjustment unit is used for distributing access UE according to amended corresponding relation.
One embodiment of the present of invention provide a kind of base station controller, comprising:
Interface is used for connecting at least two MSC interfaces, and interactive information between the MSC;
Detecting unit, whether signaling can reach to be used to detect described each MSC;
Processing unit is used for if signaling is unreachable, then revises the corresponding relation between UE and described each MSC;
Adjustment unit is used for distributing access UE according to described amended corresponding relation.
Compare prior art, method, network and base station controller that the realization network load that one embodiment of the present of invention provide is adjusted, in the A-Flex networking, occurring wherein, MSC takes place under the inaccessible situation of signaling, revise the corresponding relation of UE and MSC, when UE inserts, distribute access UE according to amended corresponding relation, thereby solved the problem that load is adjusted in the MSC pond in the A-Flex circuit domain.
Description of drawings
Fig. 1 is an A-Flex framework networking diagram in the prior art.
Fig. 2 is the schematic flow sheet of first embodiment of the invention;
Fig. 3 is the structural representation of second embodiment of the invention;
Fig. 4 is third embodiment of the invention nodal operation and signal flow graph.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples, and with reference to accompanying drawing, the present invention is described in more detail.
In an embodiment of the present invention, the BSC in the network detects the signaling reachable state of the MSC in the network.In case find to have fault MSC, then upgrade the UE of preservation and the corresponding relation of MSC, make UE when making a call, BSC can be registered to UE normal MSC accurately.
Fig. 2 is the schematic flow sheet of first embodiment of the invention, and as shown, this method may further comprise the steps:
Whether signaling can reach each MSC in the step 201:BSC detection MSC pond;
BSC obtain mode that whether MSC signaling in the pond can reach situation can have a variety of, for example: between BSC and MSC, set up handshake mechanism or by Link State being judged whether obtain signaling can reach situation.
If between BSC and MSC, set up handshake mechanism, show when shaking hands success that then signaling can reach, and when shaking hands failure, show that signaling is unreachable.Handshake is meant the signal of a series of mutual identifications, and signal occurs in and communicates between the two computational devices or when transmitting information.
BSC also can be by judging to Link State whether obtain signaling can reach situation.For example, the Link State between BSC judgement and the MSC, in the time can arriving the MSC signalling point by the link between BSC and the MSC, BSC judges that this MSC signaling can reach; And in the time can not arriving the MSC signalling point by the link between BSC and the MSC, BSC judges that this MSC signaling is unreachable.
Certainly, BSC also may obtain the information whether the MSC signaling can reach passively, and for example: broken down by certain MSC of network management system notice BSC, this notification procedure can be the automatic notice of network management system or pass through artificial notice; Perhaps break down by certain MSC of other network element (as other normal MSC in the resource pool) notice BSC.
Step 202: if signaling is unreachable, then BSC revises the corresponding relation between each MSC in UE and the MSC pond.
Wherein BSC revises one of in the following ways corresponding relation: the UE of the inaccessible MSC correspondence of described signaling is distributed to normal MSC; Perhaps, UE is redistributed to normal MSC.
Corresponding relation between each MSC is set in this step in UE and the MSC pond can be finished by number section allocation list of system's setting, and this number section allocation list is stored in BSC, also can link to each other with BSC as a memory cell separately, does not limit at this.
Be provided with the IMSI section of UE and corresponding MSC ID in number section allocation list, this corresponding relation can be set according to predetermined policy, and the IMSI section of UE can be actual IMSI number sign indicating number section, also can be the sign indicating number section of the number that calculates through special algorithm.This predetermined policy can be directly to use IMSI or specify computational methods by HASH function calculation or operator.
Shown in the following table, be a number section allocation list for example.
| The IMSI section | MSCID |
| 46003090000xxxx | MSC1 |
| 46003090003xxxx | MSC1 |
| 4600309xxxxxxxx | MSC2 |
| 46003090001xxxx | MSC3 |
| ...... | ..... |
Table 1a: number section allocation list (actual IMSI number data)
| The HASH value of IMSI (user's piece) | MSCID |
| 1xx | MSC1 |
| 2xx | MSC1 |
| 3xx | MSC2 |
| 4xx | MSC3 |
| ...... | ..... |
Table 1b: number section allocation list (1000 computings of user's IMSI number process mould are obtained the number of a 0-999 when tabling look-up, inquiry can obtain the MSC sign in table then).
In number section allocation list, distribute normal MSC according to adjusting strategy or outside indication UE with the inaccessible MSC correspondence of signaling; Perhaps, in number section allocation list, UE is redistributed to normal MSC according to adjusting tactful or outside indication.
Adjusting strategy can be various suitable algorithms, for example: select a MSC among all normal MSC at random in corresponding relation, perhaps adopt the mode of polling therefrom to select a MSC.
With the polling is example, if break down at a moving exchanging center MSC 1, for the UE of fault moving exchanging center MSC 1, BSC will be successively be revised as a normal MSC2 with the MSC of this first UE correspondence; BSC is revised as the next one with the MSC of second UE correspondence and is forwarded to other normal MSC, for example, and by sequence number selective sequential MSC3.And the like, the UE in the fault moving exchanging center MSC 1 is distributed to other normal mobile switching centres in turn.
BSC selects the method for normal MSC also to comprise: according to the load condition of MSC, select the minimum MSC of load.Select the minimum MSC of load more to help load sharing, make the load balancing between each MSC.Wherein, the algorithm about load sharing can also adopt any suitable algorithm in the prior art.
Step 203:BSC distributes access UE according to amended corresponding relation.
When UE when BSC sends register requirement, BSC is transmitted to corresponding M SC by number section allocation list with the registration message of this UE to the UE that inserts, to the MSC request registration.MSC makes this UE handle related service by this MSC for this UE registration.
UE in this enforcement inserts, and may be that the UE start inserts, and also may be the access again behind the last time access failure.
Fig. 3 is the structural representation of second embodiment of the invention, and second embodiment of the invention provides a kind of base station controller 300, comprising:
Interface is used for connecting at least two MSC interfaces, and interactive information between the MSC;
Detecting unit 310, processing unit 320 and adjustment unit 330;
Detecting unit 310 is used to detect in the MSC pond each MSC, and whether signaling can reach; Detection method among detection method and the method embodiment in the step 201 is identical, does not repeat them here.
Be provided with in the present embodiment that the corresponding relation between each MSC can be stored in BSC in UE and the MSC pond, also can link to each other with BSC as a memory cell separately, do not limit at this.
Adjusting strategy in the strategy generating unit 322 can be various suitable algorithms, for example: select a MSC among all normal MSC at random in corresponding relation, perhaps adopt the mode of polling therefrom to select a MSC.
With the polling is example, if break down at a moving exchanging center MSC 1, for the UE of fault moving exchanging center MSC 1, BSC will be successively be revised as a normal MSC2 with the MSC of this first UE correspondence; BSC is revised as the next one with the MSC of second UE correspondence and is forwarded to other normal MSC, for example, and by sequence number selective sequential MSC3.And the like, the UE in the fault moving exchanging center MSC 1 is distributed to other normal mobile switching centres in turn.
BSC selects the method for normal MSC also to comprise: according to the load condition of MSC, select the minimum MSC of load.Select the minimum MSC of load more to help load sharing, make the load balancing between each MSC.Wherein, the algorithm about load sharing can also adopt any suitable algorithm in the prior art.
Fig. 4 is the nodal operation and the signal flow graph of third embodiment of the invention.In the present embodiment, three MSC:MSC0 are arranged, MSC1, MSC2 in the MSC pond; And these three MSC all link to each other in BSC and the pond, and signaling can reach.Initial UE and the corresponding relation between the moving exchanging center MSC can adopt following number section allocation list.Wherein the M value among HASH function (IMSI/10) the mod M is 1000,
| The HASH value of IMSI (user's piece) | MSCID |
| 000 | MSC0 |
| 001 | MSC0 |
| …… | …… |
| 332 | MSC0 |
| 333 | MSC1 |
| …… | …… |
| 665 | MSC1 |
| 666 | MSC2 |
| …… | …… |
| 998 | MSC2 |
| 999 | MSC2 |
Moving exchanging center MSC in the BSC detection cell (be MSC0, MSC1, whether MSC2) whether signaling can reach, in embodiments of the present invention, no matter exist under the situation of UE call business, and BSC detects MSC signaling reachable state in the pond in the network.In case finding has the inaccessible MSC of signaling, then revises above-mentioned section allocation list.
Suppose that signaling is unreachable between emerged in operation BSC of system and MSC1, then BSC adopts and adjusts strategy automatically, upgrades above-mentioned section allocation list.
For example: this adopts adjusts strategy automatically, and the UE with MSC1 in number section allocation list distributes to MSC0, MSC2.Step is as follows:
1. the number N of user's piece of MSC1 carrying in the calculating section allocation list.
2. the MSC0 of normal operation in the calculating section allocation list, MSC2, user's piece sum SUM of carrying.
3. user's piece number of the MSC of each normal operation carrying and the ratio B0 of SUM in the calculating section allocation list, B2.
4. to the MSC0 of normal operation, MSC2 is successively from user's piece of MSC1 carrying, integer user's piece after the taking-up " N * B0 rounds ", integer after " N * B2 rounds " user's piece, modification section allocation list make the processor of these user's piece correspondences be respectively MSC0, MSC2.
5., then remaining user's piece is adjusted to certain normal MSC that moves, such as MSC2 if user's piece of former cause MSC1 carrying also had remaining unadjusted user's piece because of rounding after last step.
For example: also can adopt automatic adjustment strategy, in number section allocation list, all UE be redistributed to MSC0, MSC2, step is as follows:
1. determine the total TOTAL of user's piece in the calculating section allocation list.
2. user's piece sum SUM of the MSC of all normal operations carrying in the calculating section allocation list.
3. user's piece number of the MSC of each normal operation carrying and the ratio B0 of SUM in the calculating section allocation list, B2.
4. to the MSC0 of normal operation, from calculating section allocation list, take out the integer user's piece after " TOTAL * B0 rounds " successively, it is MSC0 that modification makes the processor of these user's piece correspondences;
To the MSC2 of normal operation, from calculating section allocation list, take out the integer user's piece after " TOTAL * B2 rounds " successively, it is MSC2 that modification makes the processor of these user's piece correspondences;
5., then adjust the MSC that gives certain normal operation, such as MSC0 if after giving user's piece of all normal MSC allocation process of moving, also have remaining unappropriated user's piece.
Through adjusting automatically, it is as follows to obtain new number section allocation list:
| The HASH value of IMSI (user's piece) | MSCID |
| 000 | MSC0 |
| 001 | MSC0 |
| …… | …… |
| 332 | MSC0 |
| 333 | MSC0 |
| …… | …… |
| 498 | MSC0 |
| 499 | MSC2 |
| …… | …… |
| 665 | MSC2 |
| 666 | MSC2 |
| …… | …… |
| 998 | MSC2 |
| 999 | MSC2 |
As table, the processing MSC of user's piece 665 was MSC1 originally, was modified to MSC2 after the MSC1 signaling is unreachable.BSC is 460030916886659 UE to the IMSI that inserts, and its user's piece number is 665 after the HASH computing, and then BSC will send to MSC2 to CM Service Request message, guarantee the normal access of calling out.
Step 401, UE make a call, and send ORM (Origination MSG) message to BSC, carry the feature keyword IMSI of sign UE in the message.
Step 402, BSC be according to the IMSI in the ORM message, adopts the HASH algorithm to determine that user's piece number is 665, and the number of searching section allocation list knows that the processing MSC of this UE is MSC2 then;
Step 403, BSC send CM Service Request information and sending to MSC2, handle the calling that this UE initiates by MSC2.
Step 404, MSC2 receive CM Service Request message, handle by normal call flows
In sum, the invention enables in the A-Flex networking, occurring wherein, MSC takes place under the inaccessible situation of signaling, revise the corresponding relation of UE and MSC, when UE inserts, distribute access UE according to amended corresponding relation, thereby solved the problem that load is adjusted in the MSC pond in the A-Flex circuit domain.
The described several preferred embodiment that neutralizes of detailed description in front; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. realize load adjustment method for one kind, it is characterized in that:
Whether signaling can reach each MSC in the detection moving exchanging center MSC pond, if signaling is unreachable, then revises the corresponding relation between each MSC in user equipment (UE) and the described MSC pond, distributes according to described amended corresponding relation and inserts UE.
2. method according to claim 1 is characterized in that, revises described corresponding relation in the following ways:
The UE of the inaccessible MSC correspondence of described signaling is distributed to normal MSC.
3. method according to claim 1 is characterized in that, revises described corresponding relation in the following ways:
UE is redistributed to normal MSC.
4. method according to claim 1 is characterized in that:
Correspondence setting in described UE and the described MSC pond between each MSC is in number section allocation list.
5. method according to claim 4 is characterized in that, revises one of in the following ways described corresponding relation:
In described section allocation list, the UE of the inaccessible MSC correspondence of described signaling is distributed to normal MSC; Perhaps,
In described section allocation list, UE is redistributed to normal MSC.
6. method according to claim 4 is characterized in that:
In described section allocation list, distribute to normal MSC according to adjusting the UE of strategy with the inaccessible MSC correspondence of described signaling; Perhaps,
In described section allocation list, UE is redistributed to normal MSC according to adjusting strategy.
7. method according to claim 6 is characterized in that, described adjustment strategy is:
In all normal MSC, select in turn; Perhaps,
According to the load condition of each MSC, select the minimum MSC of load.
8. according to each described method of claim 1 to 7, it is characterized in that whether signaling can reach each MSC in the described MSC of the described detection pond, comprising:
Set up handshake operation between each MSC in described BSC and the described MSC pond, when handshake operation is failed, determine that signaling is unreachable; Perhaps,
Determine according to the Link State between each MSC in described BSC and the described MSC pond described whether signaling can reach.
9. a network of realizing loading and adjusting comprises MSC and BSC, and a BSC links to each other with a plurality of MSC, it is characterized in that, also comprises:
Detecting unit, whether signaling can reach to be used to detect described each MSC;
Processing unit is used for if signaling is unreachable, then revises the corresponding relation between UE and described each MSC;
Adjustment unit is used for distributing access UE according to described amended corresponding relation.
10. network according to claim 9 is characterized in that, described processing unit also comprises,
The strategy generating unit is used for storage and adjusts strategy;
The load adjustment unit is used to receive the adjustment strategy that tactful generating unit sends, and tactful according to described adjustments, and the UE of the inaccessible MSC correspondence of described signaling is distributed to normal MSC.
11. network according to claim 9 is characterized in that, described processing unit also comprises,
The strategy generating unit is used for storage and adjusts strategy;
The load adjustment unit is used to receive the adjustment strategy that tactful generating unit sends, and according to described adjustment strategy, UE is redistributed to normal MSC.
12. a base station controller is characterized in that, comprising:
Interface is used for connecting at least two MSC interfaces, and interactive information between the MSC;
Detecting unit, whether signaling can reach to be used to detect described each MSC;
Processing unit is used for if signaling is unreachable, then revises the corresponding relation between UE and described each MSC;
Adjustment unit is used for distributing access UE according to described amended corresponding relation.
13. base station controller according to claim 12 is characterized in that, described processing unit also comprises,
The strategy generating unit is used for storage and adjusts strategy;
The load adjustment unit is used to receive the adjustment strategy that tactful generating unit sends, and tactful according to described adjustments, and the UE of the inaccessible MSC correspondence of described signaling is distributed to normal MSC.
14. base station controller according to claim 12 is characterized in that, it is characterized in that, described processing unit also comprises,
The strategy generating unit is used for storage and adjusts strategy;
The load adjustment unit is used to receive the adjustment strategy that tactful generating unit sends, and according to described adjustment strategy, UE is redistributed to normal MSC.
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| CNA2006100646616A CN101212711A (en) | 2006-12-30 | 2006-12-30 | Load adjusting method, network, and base station controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092259A1 (en) * | 2007-12-28 | 2009-07-30 | Huawei Technologies Co., Ltd. | Method for establishing connection and paging under flex networking, signaling process entity and network system thereof |
| CN101945433B (en) * | 2009-07-10 | 2013-07-17 | 中国移动通信集团上海有限公司 | Method, system and equipment for selecting mobile switch center server |
| CN103945431A (en) * | 2013-01-17 | 2014-07-23 | 电信科学技术研究院 | Network control method and device |
-
2006
- 2006-12-30 CN CNA2006100646616A patent/CN101212711A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092259A1 (en) * | 2007-12-28 | 2009-07-30 | Huawei Technologies Co., Ltd. | Method for establishing connection and paging under flex networking, signaling process entity and network system thereof |
| CN101945433B (en) * | 2009-07-10 | 2013-07-17 | 中国移动通信集团上海有限公司 | Method, system and equipment for selecting mobile switch center server |
| CN103945431A (en) * | 2013-01-17 | 2014-07-23 | 电信科学技术研究院 | Network control method and device |
| CN103945431B (en) * | 2013-01-17 | 2018-04-17 | 电信科学技术研究院 | A kind of method and device for carrying out network control |
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