CN1184763C - Method for optimizing transmission resource in CDMA system - Google Patents
Method for optimizing transmission resource in CDMA system Download PDFInfo
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- CN1184763C CN1184763C CNB011305746A CN01130574A CN1184763C CN 1184763 C CN1184763 C CN 1184763C CN B011305746 A CNB011305746 A CN B011305746A CN 01130574 A CN01130574 A CN 01130574A CN 1184763 C CN1184763 C CN 1184763C
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- 238000013508 migration Methods 0.000 claims abstract description 94
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Abstract
The present invention provides a transmission resource optimization method in a CDMA system. The method migration determines whether migration is initiated and which users migrate in the CDMA system according to the real-time occupied situation of transmission resources of the current each interface when the mobility and the switching of the user terminal cause a second base station controller connected with the user currently and a first base station controller which is in initial connection with the second base station controller to be separated. Thus, the optimization of the system resources is ensured, the quality of service is furthest protected, and damage of the service caused by the pointless migration is avoided.
Description
Technical field
The present invention relates to communication system, relate in particular to the method for different internodal optimizing transmission resources in the cdma cellular mobile communication system.
Background technology
In existing C DMA cell mobile communication systems,, make that the radio-frequency power of base station is confined within certain scope (sub-district) in the system for the utilance that improves frequency spectrum resource and the capacity of whole system.Enter the another one sub-district when travelling carriage leaves a sub-district, the signal of the original sub-district that this travelling carriage received inevitable more and more a little less than, and its received signal that enters the sub-district is also just more and more stronger.In order to keep the communication quality of travelling carriage, must switch to the stronger base station of signal that newly enters by original base station to continuing of this travelling carriage, the notion of switching in Here it is the cell mobile communication systems.
In CDMA mobile communication system, to distinguish because different channels passes through the sign indicating number resource, rather than distinguish by time slot or frequency, this makes a kind of technology that is called soft handover become possibility.Soft handover just is meant that (User Equipment UE) in identical frequency band and identical time, utilizes different channel code to user terminal, communicates with a plurality of cell base stations simultaneously.The application of soft handover is that cdma system is different from one of distinguishing feature of other system.It has not only improved performance of handoffs, and by means of the grand diversity of a plurality of base station communications, has increased forward direction and reverse capacity.
Owing to have soft handover, need the signal that different base station receives be merged at network side.If these base stations belong to a base station controller, then the different base station signal by and base station controller between interface be sent to base station controller, finish merging then.But in addition, also exist different base station to adhere to the situation of different base station controller separately.The combined signal of this moment need be transferred to the base station controller that the user connects the place by the interface between the base station controller, so just must cause taking of transfer resource between the base station controller.
When at the user terminal on two base station controller borders owing to move first base station controller (the Serving Radio Network Controller that connects the place gradually away from it, SRNC) time, a kind of situation that may occur is: all belong to second base station controller (Drifting Radio NetworkController with all base stations of telex network, DRNC), promptly be in released state.But this moment, signal still needed to be transferred to first base station controller by the interface between first base station controller and second base station controller, was transferred to core net by first base station controller then.The appearance of this situation has caused the waste for base station controller interface transfer resource, and the increase of service delay.
A kind of technology that is called migration is applied in such cases.Migration is promptly by a series of signaling process, finally reach and make second base station controller fulfil the responsibility of first base station controller simultaneously, and keep communicating by letter with core net with the interface of core-network side by second base station controller, and the transfer resource of the interface of the first original base station controller and second base station controller is released, and first base station controller originally and the interface transfer resource of core net also are released.
In the prior art scheme, only pay close attention to the realization of flow process, for when initiating migration, when do not initiate migration, then do not mention not having similar related data and file yet.In actual applications, in case be not released state to occur just to need migration, because migration itself has brought the load of signaling, and the possible damage to business.
Summary of the invention
The objective of the invention is to provide a kind of method of suitable migration judgement to cdma system, make that the base station controller in the cdma system can be according to the real-time occupancy of current each interface transfer resource, whether decision initiates migration, and the order which business is moved and moved.System resource is optimized, thereby has guaranteed quality of service, the damage of avoiding meaningless migration to cause business.
The object of the present invention is achieved like this, when first base station controller that user terminal initially connects the place separates with current second base station controller that is connected the place, according to the interface of the Iur between described first base station controller and described second base station controller and the transfer resource occupancy of the Iu interface between described two base station controllers and the core net, determine described first base station controller whether to initiate migration request and whether described second base station controller accepts migration request, which user is moved, specifically comprise the steps:
A. after triggering startup migration judgement request module; Judge whether the base station controller that user terminal connects separates,, then refuse migration request if not, enter step j if enter step b;
B. whether nervous at the transfer resource occupancy of described first side of base station controller detection Iur interface, if then described first side of base station controller is initiated migration request, the reason of migration is set to: Resourceoptimisation relocation enters steps d; Then enter step c if not;
Whether nervous, if Iu interface anxiety is then initiated migration request, the reason of migration is set to: Resource optimisation relocation enters steps d if c. continuing to detect the described first side of base station controller Iu interface; If the Iu interface takes it easy and then refuses migration request, enter step j;
D. judge migration reason at described second side of base station controller,, then force migration, enter step I if migration reason is " Time criticalrelocation "; If not this reason enters step e;
E. described second base station controller judges whether the grammer of the migration request that described first base station controller sends and logic be correct, if correctly enter step f, if mistake is then returned failed message, enters step j;
F. judge migration reason at described second side of base station controller, if migration reason is " Resourceoptimisation relocation ", then detect the transfer resource occupancy of the Iur interface between described second base station controller and corresponding described first base station controller, if Iur interface anxiety, then accept this migration, enter step h; If the Iur interface takes it easy, then enter step g;
G. continue the transfer resource occupancy of the Iu interface of described second side of base station controller of detection,, then accept this migration, enter step h if described Iu interface takes it easy; Otherwise do not accept this migration, and return failed message, enter step j;
H. described second base station controller is the migration request Resources allocation, if be allocated successfully and return success message, enters step I, if distribute failure or because other reason can not be moved, remigration failed message then, and point out failure cause enters step j;
I. move the business of non-delay sensitive, no longer nervous after the business migration of described non-delay sensitive is finished if detect the transfer resource occupancy of Iur interface between described first base station controller and second base station controller, then stop migration, enter step j; Otherwise continue the business of delay sensitive is moved.
J. transition process finishes.
In above-mentioned steps a, if described first base station controller is in released state with the user terminal that current existence is connected, the then Iur at maintenance customer's terminal place tabulation.
Above-mentioned first base station controller monitor in real time all Iur interfaces that are attached thereto the transfer resource occupancy and with the transfer resource occupancy of the Iu interface of core net.
Above-mentioned first base station controller can select on the Iur interface all or part to be in the user terminal of released state, initiates migration request to second base station controller, alleviates up to the resource pressure.
The transfer resource occupancy of above-mentioned Iur interface and Iu interface, the percentage that can adopt the transfer resource that has distributed to account for total resources is set threshold value and is judged, surpass last prescribing a time limit when the transfer resource that has distributed accounts for the total resources ratio, represent this interface anxiety, described higher limit is 80%～95%; Be lower than down in limited time when the transfer resource that has distributed accounts for the total resources ratio, represent that this interface takes it easy, described lower limit is 60%～10%.Also can adopt unappropriated transmission bandwidth value to set threshold value and represent, when remaining unappropriated bandwidth is lower than down in limited time, represent this interface anxiety, described lower limit is 0.5M～2M; When remaining unappropriated bandwidth surpasses last prescribing a time limit, represent that this interface takes it easy, described higher limit is 4M～10M.
In above-mentioned steps i, the migration of the business of non-delay sensitive is carried out according to its data rate order from big to small.
In above-mentioned steps i, professional delay character is at first considered in the migration of delay sensitive business, the professional priority migration that time delay is big, and next considers the service traffics size, the professional priority migration that flow is big;
The present invention has taken all factors into consideration the optimization of Iur interface and Iu interface resource; By real-time monitoring, carry out migration judgement, thereby saved the transfer resource of Iur interface at the Iur resource optimization to the Iur interface resource; By real-time monitoring to 1u interface transfer resource, adjusted the use of Iu resource between different base station controller and the core net, thus the use of having saved Iu interface transfer resource.From the damage of having avoided meaningless migration to cause to the full extent, reached the optimization of migration performance to business.
Description of drawings
Fig. 1: the node connection diagram under the released state
Fig. 2: first base station controller judgement schematic diagram of moving out
Fig. 3: second base station controller judgement schematic diagram of moving into
Embodiment
Further specify the present invention below in conjunction with accompanying drawing and example.
Node connection diagram under the cdma system released state as shown in Figure 1, this figure is made up of following several parts: 11 for core net CN (Core Network); 12 is the first base station controller SRNC (Serving RadioNetwork Controller); 13 is the second base station controller DRNC (Drifting Radio NetworkController), and it also is simultaneously the TRNC (Target Radio NetworkController) of migration in migration; 14 is base station node B; 15 is user terminal UE (User Equipment), interface between the core net 11 and first base station controller 12 is represented as the Iu interface, interface between first base station controller 12 and second base station controller 13 is represented as the Iur interface, interface between second base station controller 13 and the base station 14 is represented as Iub interface, and the interface between base station 14 and the user terminal 15 is represented as the Uu interface.
When first base station controller 12 that initially connects the place when user terminal separates with current second base station controller 13 that is connected the place, transfer resource occupancy according to the Iu interface between the Iur interface between first base station controller 12 and second base station controller 13 and above-mentioned two base station controllers and the core net, determine whether first base station controller 12 initiates to ask and whether second base station controller 13 accepts migration request, and decision is moved to which business.
The process of moving out of first base station controller 12 at first triggers to start and moves the judgement request module as shown in Figure 2, and first base station controller, 12 sides according to switching result, safeguard whether it is in the tabulation of released state for the user terminal 15 that current existence connects.When all Radio Links are not in when with first base station server 12 base station 14 that is connected being arranged, promptly think separation to have occurred.If separate, also want the Iur tabulation at maintenance customer's terminal 15 places.
First base station controller 12 is monitored the transfer resource occupancy of all Iur interfaces that are attached thereto and Iu interface in real time, and judge whether anxiety, the ratio that accounts for total resources when the transfer resource that has distributed is 80% when above, for example certain detect the transfer resource that has distributed account for total resources ratio 85%, represent this interface anxiety; When the transfer resource that has distributed accounts for the ratio 60% of total resources when following, for example certain detect the transfer resource that has distributed account for total resources ratio 50%, represent that this interface takes it easy.Also can judge whether Iur interface and Iu interface nervous according to unappropriated transmission bandwidth value, when remaining unappropriated bandwidth when 2M/s is following, such as only being left 384Kbit/s, represent this interface anxiety; When remaining unappropriated bandwidth when 4M/s is above, such as reaching 8Mbit/s, represent that this interface takes it easy.
If the testing result of first base station controller 12 is an Iur interface transfer resource occupancy anxiety, then initiate migration request, the reason of migration is set to: Resource optimisation relocation, if the result is for taking it easy, whether the Iu interface that then continues detection first base station controller 12 is nervous, if Iu interface anxiety is then initiated migration request, the reason of migration is set to: Resource optimisation relocation, if the Iu interface takes it easy and then refuses migration request.
When first base station controller 12 is initiated migration request, can select to be on its all Iur interfaces the user terminal of released state, also can only select the separate users on the part Iur interface to initiate migration request.
The process of moving into of second base station controller 13 as shown in Figure 3, after receiving migration request, judge migration reason, if migration reason is " Time critical relocation ", then force migration, as judge that the grammer of the migration request that first base station controller sends and logic are wrong, and return failed message, finish transition process.As judge migration reason for " Resource optimisation relocation ", then detect the transfer resource occupancy of the Iur interface between second base station controller and first base station controller, if anxiety is then accepted this migration request; If take it easy, then continue the transfer resource occupancy of the Iu interface of detection second side of base station controller, if the Iu interface takes it easy, then accept this migration request, if Iu interface anxiety is not then accepted this migration request, and returned failed message, finish transition process.
After second base station controller 13 is accepted migration request, be this migration request Resources allocation, return success message if be allocated successfully, finish transition process, can not move as if the distribution failure or because of other reason, then the remigration failed message, and point out to finish transition process by failure cause.
The business that first base station controller 12 is connected is moved out process in a certain order, at first to the business of non-delay sensitive, initiate migration according to its data rate order from big to small, the for example current non-delay sensitive business that has 2Mbit/s, 384Kbit/s, 64Kbit/s, then at first move 2Mbit/s, next moves 384Kbit/s, moves the business of 64Kbit/s at last; If the transfer resource occupancy of Iu and Iur interface became the state of taking it easy by tense situation after the migration of non-delay sensitive business was finished, for example drop to 50% occupancy by 85% occupancy, then stop migration; Otherwise the business of delay sensitive is moved, the professional priority migration that time delay is big is because professional time delay quality need preferentially be guaranteed again.Next considers the service traffics size, i.e. the big professional priority migration of flow is alleviated the purpose that Iu, Iur interface transfer resource take as early as possible to reach.The service traffics size here is professional rate source, also can be professional present rate, and perhaps other characterizes professional index to Iu or Iur interface transfer resource occupancy.
Claims (8)
1, a kind of method that is used for cdma cellular mobile communication system optimizing transmission resource, it is characterized in that: when first base station controller that user terminal initially connects the place separates with current second base station controller that is connected the place, transfer resource occupancy according to the Iu interface between the Iur interface between described first base station controller and described second base station controller and described two base station controllers and the core net, determine described first base station controller whether to initiate migration request and whether described second base station controller accepts migration request, which business is moved, specifically comprise the steps:
Step a, triggering judge whether the base station controller that user terminal connects separates after starting migration judgement request module, if enter step b, then refuse migration request if not, enter step f;
Step b, described first base station controller is initiated migration request, concrete steps are: whether described first base station controller detects the transfer resource occupancy of Iur interface of described first base station controller nervous, if then described first side of base station controller is initiated migration request, the reason of migration is set to: Resource optimisation relocation, enter step c, if not, whether then continue to detect the described first side of base station controller Iu interface nervous, if Iu interface anxiety then initiate migration request, Qian Yi reason is set to equally: Resource optimisation relocation, enter step c, refuse migration request if the Iu interface takes it easy, enter step f;
Step c, described second base station controller judge whether the migration reason of " Time critical relocation ", if having, then force migration, enter steps d; If do not have, judge further whether the grammer of the migration request that described first base station controller sends and logic be correct, if correctly enter step c1,, enter step f if mistake is then returned failed message;
Step c1, described second base station controller judge whether to accept the migration request that described first base station controller is initiated, concrete steps are: judge migration reason at described second side of base station controller, if migration reason is " Resourceoptimisation relocation ", then detect the transfer resource occupancy of the Iur interface between described second base station controller and corresponding described first base station controller, if Iur interface anxiety, then accept this migration, enter steps d; If the Iur interface takes it easy, then continue the transfer resource occupancy of the Iu interface of described second side of base station controller of detection, if described Iu interface takes it easy, then accept this migration, enter steps d; Otherwise do not accept this migration, and return failed message, enter step f;
Steps d, described second base station controller are the migration request Resources allocation, if be allocated successfully and return success message, enter step e, if distribute failure or because other reason can not be moved, remigration failed message then, and point out failure cause enters step f;
Step e, described second base station controller are carried out migration, concrete steps are: the business of moving non-delay sensitive earlier, it is no longer nervous after the business migration of described non-delay sensitive is finished if detect the transfer resource occupancy of Iur interface between described first base station controller and second base station controller, then stop migration, enter step f; Otherwise continue the business of delay sensitive is moved;
Step f, transition process finish.
2, the method for claim 1 is characterized in that, in step a, if described first base station controller is in released state with the user terminal that current existence is connected, and the Iur at then described first base station controller maintenance customer terminal place tabulation.
3, the method for claim 1 is characterized in that, described first base station controller monitor in real time all Iur interfaces that are attached thereto the transfer resource occupancy and with the transfer resource occupancy of the Iu interface of core net.
4, the method for claim 1 is characterized in that, described first base station controller can select on the Iur interface all or part to be in the user terminal of released state, initiates migration request to second base station controller, alleviates up to the resource pressure.
5, the method for claim 1, it is characterized in that, the transfer resource occupancy of described Iur interface and Iu interface, the percentage that can adopt the transfer resource that has distributed to account for total resources is set threshold value and is judged, when accounting for the total resources ratio, the described transfer resource that has distributed surpasses last prescribing a time limit, represent this interface anxiety, described higher limit is 80%～95%; Be lower than down in limited time when the described transfer resource that has distributed accounts for the total resources ratio, represent that this interface takes it easy, described lower limit is 60%～10%.
6, the method for claim 1, it is characterized in that, whether the transfer resource occupancy of described Iur interface and Iu interface is nervous, can adopt unappropriated transmission bandwidth value to set threshold value represents, when described unappropriated transmission bandwidth is lower than down in limited time, represent this interface anxiety, described lower limit is 0.5M～2M; When described unappropriated transmission bandwidth surpasses last prescribing a time limit, represent that this interface takes it easy, described higher limit is 4M～10M.
7, the method for claim 1 is characterized in that, in step e, the migration of the business of described non-delay sensitive is carried out according to its data rate order from big to small.
8, the method for claim 1 is characterized in that, in step e, and the professional priority migration that the migration of described delay sensitive business is at first big to time delay, the secondly professional priority migration big to flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB011305746A CN1184763C (en) | 2001-12-05 | 2001-12-05 | Method for optimizing transmission resource in CDMA system |
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| CNB011305746A CN1184763C (en) | 2001-12-05 | 2001-12-05 | Method for optimizing transmission resource in CDMA system |
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| CN1184763C true CN1184763C (en) | 2005-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010133179A1 (en) * | 2009-05-21 | 2010-11-25 | 华为技术有限公司 | Switching method, apparatus and system for realizing circuit switching (cs) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100372435C (en) * | 2004-09-23 | 2008-02-27 | 华为技术有限公司 | Base station controller migration method undur separation state |
| CN100391302C (en) * | 2004-12-31 | 2008-05-28 | 京移通信设计院有限公司 | Wireless resource occupation algorithm for wireless communication system |
| CN100421514C (en) * | 2005-04-30 | 2008-09-24 | 中国移动通信集团公司 | Method for distributing block domain data service radio channels |
| CN100455111C (en) * | 2005-07-09 | 2009-01-21 | 华为技术有限公司 | Method and system of realizing R3 interface shift based on resource optimization |
| CN101778440B (en) * | 2010-01-08 | 2012-11-21 | 华为技术有限公司 | Method for migrating user plane from Iur-g interface towards A interface and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010133179A1 (en) * | 2009-05-21 | 2010-11-25 | 华为技术有限公司 | Switching method, apparatus and system for realizing circuit switching (cs) |
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