CN1163010C - Dynamical channel configuration method for CDMA celllar mobile communication system - Google Patents
Dynamical channel configuration method for CDMA celllar mobile communication system Download PDFInfo
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- CN1163010C CN1163010C CNB011053461A CN01105346A CN1163010C CN 1163010 C CN1163010 C CN 1163010C CN B011053461 A CNB011053461 A CN B011053461A CN 01105346 A CN01105346 A CN 01105346A CN 1163010 C CN1163010 C CN 1163010C
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Abstract
The present invention relates to a dynamic channel configuration method for a code division multiple access cellular mobile communication system. The method comprises the steps that measurement control parameters are configured for a grouping service; a measurement report is received, and a measurement result is extracted; whether the current load situation needs to be obtained is determined, and a channel reconfiguration decision is made according to the determination result; when event triggering or periodic reports are realized, and the triggering has the reason that the result of service measurement is larger than the upper threshold or smaller than the lower threshold, the parameters of the load situation are obtained, and the reconfiguration decision of dynamic channels is comprehensively made; or the reconfiguration decision of dynamic channels is made only through considering the result of service measurement; according to the determination result, suitable new channel resources are configured for the service.
Description
The present invention relates to a kind of code division multiple access (CDMA) cell mobile communication systems, relate in particular to a kind of dynamic channel configuration method that is used for code vision multiple address cellular mobile communication system.
Along with Internet development and universal rapidly, increasing wireless device (as mobile phone) provides the Internet access function, and the WWW (World Wide Web (WWW) World Wide Web) that enjoying the Internet provides browses, FTP (file transfer) downloads and the E_Mail very big Packet Services of service source changes in data rate such as (Emails).For example when the user clicks the connection of the WWW page, can send a download request, in this request process, one or more packet sequences will be sent out, and have lot of data and require to transmit rapidly this moment on the channel; After the desired profile download of user was finished, the user read with the regular hour, so during this time the data volume on the channel just becomes seldom.This shows characteristics such as that these Packet Services have is sudden, the rate dynamic excursion is big.If give the channel resource of this traffic assignments fixed-bandwidth according to the way of routine, in business burst, just might not satisfy the data demand of transmission fast, then wasted unnecessary channel resource seldom the time in business datum.A kind of effective solution is the variation characteristic according to business, carry out the dynamic-configuration of channel, if the current data rate of transmission that needs is very big, in the time of can not meeting the demands down to original channel width of distributing, just carry out reshuffling of channel, for it distributes bigger channel resource; When idle relatively, reshuffle little bandwidth once more and give this business, thereby to improve the utilization ratio of channel resource.
Fig. 1 has provided a kind of typical characteristics of Packet Service.As seen from the figure, the conversation procedure of a Packet Service is made up of several packet calls, each packet call comprises a plurality of grouping requests again, exist certain time of advent at interval between grouping and the grouping, when a packet call reaches, the user reads the data that arrive with a period of time (reading time), and during this period of time the data on the channel seldom; After the data reading was finished, initiation packet was called out once more; So constantly circulation is up to service ending.
Improve efficiency of resource, just be necessary for certain Packet Service and dynamically dispose suitable channel resource, thereby keep more resources so that more user's access service to be provided for system.This just means that for the business of certain variable bit rate, we will follow the tracks of the demand data that it constantly changes in time, for the dynamic channel configuration provides reliable foundation.
In 3-G (Generation Three mobile communication system) (for example WCDMA cell mobile communication systems), the dynamic channel configuration realizes by measuring business volume.In the data service communication period, this professional traffic carrying capacity is carried out continuous measurement, the related parameter that has of measurement is disposed by high level, comprises measuring object, measuring amount, triggering thresholding and report manner etc.When report manner is periodic mode,, just initiate the measuring business volume report if the traffic carrying capacity that measures meets or exceeds trigger gate in limited time; When report manner is periodic mode, with the certain hour cycle just, the traffic carrying capacity that measures is reported to high level, to carry out the judgement of dynamic channel configuration.
Fig. 2 has provided a kind of schematic diagram of Event triggered traffic carrying capacity report.Traffic carrying capacity among the figure can be a data volume waiting for transmission in the buffering area, triggers thresholding and is provided by measuring control by high level.Among Fig. 2 a, when the traffic carrying capacity that measures surpasses Upper threshold, trigger a traffic carrying capacity report that surpasses Upper threshold; Equally, among Fig. 2 b, when the traffic carrying capacity that measures is lower than Lower Threshold, just trigger a traffic carrying capacity report that is lower than Lower Threshold.Can provide the data volume (average, the variance that perhaps also comprise data volume) of this business corresponding buffer region that measures in the report.
After receiving the traffic carrying capacity report, high level just carries out the dynamic channel configuration according to the report amount in the report: if the traffic carrying capacity that measures surpasses Upper threshold, have more jumbo channel than current channel just for this business (or user) configuration, to satisfy user's business demand better; Otherwise, if the traffic carrying capacity that measures is lower than Lower Threshold, have the more channel of low capacity than the channel of current use with regard to giving this business (or user) configuration, for system keeps more Radio Resource, thus the level of resources utilization that improves system.
Yet, saturated or in system load near under the saturated situation, if certain user's business demand increases suddenly, make the traffic carrying capacity that measures surpass the Upper threshold that is provided with and trigger report, high-rise meeting be carried out reshuffling of channel according to top method, for this user distributes bigger channel capacity, can satisfy the business demand that it constantly changes.But the result often is not the such of the imagination, because when system load is saturated, phase mutual interference between the user make user's the quality of reception reach or near minimum point, if continue to improve this user's channel capacity in this case, the inevitable phase mutual interference that further improves between the user, in order to keep the signal interference ratio of certain received signal, also will suitably increase transmitting power with other subscriber-related channel, so just very likely cause the rapid decline of whole system performance.
The object of the present invention is to provide a kind of dynamic channel configuration method that is used for the cdma cellular mobile communication system, this method improves the utilization ratio of system channel resource when satisfying the QoS of customer requirement, avoid many unnecessary channel reconfiguration courses, reduce Signalling exchange, improve systematic function.
To achieve these goals, a kind of dynamic channel configuration method that is used for code vision multiple address cellular mobile communication system provided by the present invention, its step comprises: after certain user has set up a Packet Service, the suitable measurement Control Parameter of channel resource configuration according to original allocation mainly comprises the last Lower Threshold and the measurement report triggering mode that trigger measurement report; After receiving measurement report, extract the parameter in the measurement report, mainly comprise the measurement result of traffic carrying capacity, measurement report triggers reason; Whether judgement needs the present load situation of the system that obtains, and carry out the judgement of reshuffling of channel according to this court verdict: 1) if the measurement report triggering mode is Event triggered or cycle report, and the triggering reason is that the measurement result of traffic carrying capacity surpasses Upper threshold, then will obtain relevant system load parameter; Send the request that needs acquisition system present load situation and obtain the load state parameter; Coupling system present load condition parameter and measuring business volume result comprehensively carry out the judgement of reshuffling of dynamic channel: if the present load condition parameter shows that court verdict was to be the more jumbo channel resource of this business configuration when system's present load was light; If the present load condition parameter shows when system's present load is heavier that court verdict is kept the channel resource of current use for not carrying out the dynamic channel configuration; If the present load condition parameter shows current system load when saturated, then court verdict is for reducing the channel resource that this business is used; 2) if the measurement report triggering mode is the report of Event triggered or cycle, and to trigger reason be that the measurement result of traffic carrying capacity is lower than Lower Threshold, then do not need to obtain the load parameter of relevant system; Only consider that the measuring business volume result carries out dynamic channel and reshuffles judgement, and court verdict is to reduce the channel resource that this business is used; According to court verdict, be the suitable new channel resource of this business configuration.
At the above-mentioned attitude channel arrangement method that is used for code vision multiple address cellular mobile communication system, the method of the present load condition parameter of acquisition system can for: measure base station down transmitting power and obtain and set two thresholding L1 and L2 with the maximum ratio beta of transmitting power that allows, and, 1＞L1＞L2＞0; If β＜L2 shows that then system's present load is lighter; If L2＜β＜L1 shows that then system's present load is heavier; If β＞L1 shows that then system load is near saturated.
At the above-mentioned attitude channel arrangement method that is used for code vision multiple address cellular mobile communication system, obtain system the present load condition parameter method can for: measure the current data throughput of this business and obtain and distribute to the reportedly ratio γ of defeated speed of this professional maximum allowable number; Set two thresholding P1 and P2, and, 1＞P1＞P2＞0; If γ＜P2 shows that then system load is near saturated; If P2＜γ＜P1 shows that then system's present load is heavier; If γ＞P1 shows that then system's present load is lighter.
Above-mentioned dynamic channel configuration method, three kinds of situations of the load of current system have been taken into full account, that is: 1) for the heavier situation of current system loading conditions, even the measuring business volume result surpasses Upper threshold, need consideration to keep current channel resource, and do not increase reshuffling of channel capacity, thereby avoided many unnecessary channel reconfiguration courses, reduce many unnecessary signaling interaction, optimized systematic function; 2) for the very heavy situation of system load,, also need to be thought of as this business configuration channel resource still less, thereby avoided making the rough sledding of systematic function rapid deterioration, improve the overall performance of system simultaneously even the measuring business volume result surpasses Upper threshold; 3) be lower than the situation of Lower Threshold for the measuring business volume result, then taking into account system load state not directly reduces the channel of channel capacity and reshuffles.Therefore the present invention can carry out the dynamic channel configuration according to the variation of business demand under the prerequisite that satisfies the customer service quality of service requirement, improves usage factor of system resource effectively and reduces unnecessary channel and reshuffle number of times.
The present invention is further illustrated for following acetonideexample and accompanying drawing.
Fig. 1 is the business model schematic diagram of WWW browse service;
Fig. 2 is the traffic carrying capacity report schematic diagram of Event triggered;
Fig. 3 is a schematic flow sheet of the present invention;
Fig. 4 is the dynamic channel configuration judgement schematic diagram of coupling system load.
As shown in Figure 4, the schematic diagram of dynamic channel configuration judgement.Wherein: the different system loading conditions constantly of curve representation.R1, R2, R3 and R4 represent 4 measuring business volume reports under the Event triggered mode respectively, corresponding time T 1, T2, T3 and T4, and hypothesis measurement report R1 is because traffic carrying capacity is lower than the Lower Threshold of measuring business volume to be triggered, and measurement report R2, R3 and R4 are because the Upper threshold of traffic carrying capacity overflow measurement triggers.
Parameter TH1 represents system load near saturated, and TH2 represents that system load is heavier, but not near saturated, and TH3 represents that system load is low weight.
When receiving measurement report R1, because the Lower Threshold that this report is the measurement result owing to traffic carrying capacity is lower than traffic carrying capacity triggers, the present load situation of taking into account system and directly do judgement not, and court verdict is that the channel that improves channel capacity is reshuffled.
When receiving measurement report R2, because the measurement result of traffic carrying capacity is greater than the Upper threshold of traffic carrying capacity at this moment, and current system load that is to say that less than TH2 system load does not weigh, and reshuffles so court verdict is the channel that improves channel capacity.
When receiving measurement report R3, the Upper threshold of the measurement result of traffic carrying capacity this moment greater than traffic carrying capacity is described, but because the simultaneity factor load is greater than TH1, that is to say that system load is near saturated, reshuffle so court verdict is the channel that reduces channel capacity, rather than improve channel capacity.Such court verdict makes the load of system suitably to reduce, and avoided system load to continue to improve and the rapid deterioration that brings, improved the overall performance of system.
When receiving measurement report R4, the Upper threshold of the measurement result of traffic carrying capacity this moment greater than traffic carrying capacity is described, but because the simultaneity factor load is greater than TH2, that is to say that system load is heavier, so court verdict is not carry out channel to reshuffle, the channel resource of originally distributing to this Packet Service remains unchanged.
As shown in Figure 3, be the basic step of this method below:
1) after certain user has set up a Packet Service, the suitable measurement Control Parameter of channel resource configuration according to original allocation comprises measuring object, the last Lower Threshold of triggering measurement report and measurement report triggering mode etc.;
2) receive measurement report after, extract the parameter in the measurement report, comprise the measurement result of traffic carrying capacity, measurement report triggers reason etc.;
3) whether judgement needs the present load situation of the system that obtains: if the measurement report triggering mode is that Event triggered and triggering reason are that traffic carrying capacity surpasses Upper threshold, perhaps the measurement report triggering mode is that the measurement result of cycle report and traffic carrying capacity surpasses Upper threshold, then to obtain relevant system load parameter, carry out 4); Otherwise, if the measurement report triggering mode is that Event triggered and triggering reason are that traffic carrying capacity is lower than Lower Threshold, perhaps the measurement report triggering mode be trigger in the cycle and the measurement result of traffic carrying capacity less than Lower Threshold, then do not need to obtain the load parameter of relevant system, execution in step 6);
4) send request and the acquisition load state parameter that needs acquisition system present load situation;
Wherein, the acquisition of system's present load situation can have several different methods to realize.Fairly simple a kind of method is: measure base station down transmitting power and acquisition and the maximum ratio beta that allows transmitting power: set two thresholding L1 and L2, and, 1＞L1＞L2＞0; If β＜L2 shows that then system's present load is lighter; If L2＜β＜L1 shows that then system's present load is heavier; If β＞L1 shows that then system load is near saturated.
Another kind of is to measure the actual flow of certain Packet Service than being easier to implementation method, or is called throughput.Measure the current data throughput of this business and obtain and distribute to the reportedly ratio γ of defeated speed of this professional maximum allowable number; Set two thresholding P1 and P2, straight, 1＞P1＞P2＞0; If γ＜P2 shows that then system load is near saturated; If P2＜γ＜P1 shows that then system's present load is heavier; If γ＞P1 shows that then system's present load is lighter.
5) coupling system present load condition parameter and measuring business volume result comprehensively carry out the judgement of reshuffling of channel: if the present load condition parameter shows that court verdict was to be the more jumbo channel resource of this business configuration when system's present load was light; If the present load condition parameter shows when system's present load is heavier that court verdict is kept the channel resource of current use for not carrying out the dynamic channel configuration; If the present load condition parameter shows system's present load very heavy (saturation condition), then court verdict is for reducing the channel resource that this business is used.Execution in step 7 then);
6) the dynamic channel configuration of only considering the measuring business volume result is adjudicated: because this moment, the measuring business volume result was lower than Lower Threshold, court verdict is for reducing the channel resource of this business use;
7), be the new suitable channel resource of this business configuration according to court verdict.
Claims (3)
1. dynamic channel configuration method that is used for code vision multiple address cellular mobile communication system, its step comprises:
After certain user had set up a Packet Service, the suitable measurement Control Parameter of channel resource configuration according to original allocation mainly comprised the last Lower Threshold and the measurement report triggering mode that trigger measurement report;
After receiving measurement report, extract the parameter in the measurement report, mainly comprise the measurement result of traffic carrying capacity, measurement report triggers reason;
Whether judgement needs the present load situation of the system that obtains, and carries out the judgement of reshuffling of channel according to this court verdict:
1) if the measurement report triggering mode is the report of Event triggered or cycle, and to trigger reason be that the measurement result of traffic carrying capacity surpasses Upper threshold, then will obtain relevant system load parameter;
Send the request that needs acquisition system present load situation and obtain the load state parameter;
Coupling system present load condition parameter and measuring business volume result, comprehensively carry out the judgement of reshuffling of dynamic channel:
If the present load condition parameter shows that court verdict was to be the more jumbo channel resource of this business configuration when system's present load was light;
If the present load condition parameter shows when system's present load is heavier that court verdict is kept the channel resource of current use for not carrying out the dynamic channel configuration;
If the present load condition parameter shows current system load when saturated, then court verdict is for reducing the channel resource that this business is used;
2) if the measurement report triggering mode is the report of Event triggered or cycle, and to trigger reason be that the measurement result of traffic carrying capacity is lower than Lower Threshold, then do not need to obtain the load parameter of relevant system;
Only consider that the measuring business volume result carries out dynamic channel and reshuffles judgement, and court verdict is to reduce the channel resource that this business is used;
According to court verdict, be the suitable new channel resource of this business configuration.
2. a kind of dynamic channel configuration method that is used for code vision multiple address cellular mobile communication system according to claim 1 is characterized in that, the method that obtains the present load condition parameter of system is:
Measure base station down transmitting power and acquisition and the maximum ratio beta that allows transmitting power;
Set two thresholding L1 and L2, and, 1＞L1＞L2＞0;
If β＜L2 shows that then system's present load is lighter;
If L2＜β＜L1 shows that then system's present load is heavier;
If β＞L1 shows that then system load is near saturated.
3. a kind of dynamic channel configuration method that is used for code vision multiple address cellular mobile communication system according to claim 1 is characterized in that, the method that obtains the present load condition parameter of system is:
Measure the current data throughput of this business and obtain and distribute to the reportedly ratio γ of defeated speed of this professional maximum allowable number;
Set two thresholding P1 and P2, and, 1＞P1＞P2＞0;
If γ＜P2 shows that then system load is near saturated;
If P2＜γ＜P1 shows that then system's present load is heavier;
If γ＞P1 shows that then system's present load is lighter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101286926B (en) * | 2007-04-10 | 2011-03-02 | 中兴通讯股份有限公司 | Method for switching PS service in TD-SCDMA between dedicated channel and common channel |
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