CN101765160B

CN101765160B - Wireless bandwidth resource dynamic allocation method

Info

Publication number: CN101765160B
Application number: CN200810190580.XA
Authority: CN
Inventors: 许靖
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2015-05-20
Anticipated expiration: 2028-12-23
Also published as: CN101765160A

Abstract

The invention discloses a wireless bandwidth resource dynamic allocation method, in the technical scheme, firstly, when RNC decides to increase the wireless bandwidth for PS business of DCH, and if a small area has enough resources, the PS business completes accelerating reallocation on the DCH; if the resources of the small area is not enough, the PS business is chosen to reduce the speed by selecting a strategy according to the speed reduction business; and after the successful speed reduction, business which loses the request on the resources can be accepted. By the technical scheme disclosed by the invention, the resource allocation of the PS business on the DCH can be balanced by taking a user priority level and internal equity into consideration: for the businesses with the same basic priority level, the DCH bandwidths thereof are nearly the same; and for the businesses with different basic priority levels, the business with high priority level occupies more DCH bandwidth resources in a proper range. Consequently, the satisfaction degrees of different businesses in a proper range are in a balance state, and time sequence adjustment can not happen.

Description

A kind of wireless bandwidth resource dynamic allocation method

Technical field

The present invention relates to the resource dynamic distributing method of Packet Service on a kind of DCH (Packet-Swithed Data), particularly relate to TD SDMA (Time Division Synchronization CDMA, TD-SCDMA) cellular mobile telecommunications system, when DCH wireless bandwidth resource is nervous, the method for adjustment of the PS service resources on this channel.

Background technology

In TD-SCDMA system, DCH channel is the primary channel of bearer service, can carry various types of business.And at the networking initial stage, DCH is most important channel resource especially.DCH channel is UE dedicated channel, and its resource is once distribute, and be this UE special, other UE can not use.

In 3G (3th Generation) communication, introduce PS business, make business variation, can better meet consumers' demand.But simultaneously also because the bandwidth demand of often kind of business is different, cause the RBC of Access Network (Radio Bearer Control, radio bearer controls) that complicated allocated bandwidth and adjustment will be completed.For the PS business in community, the residual capacity in community is distributed in the mode of Best Effort by system.When community residual capacity is more sufficient, RBC algorithm is a kind of " distribution according to need " principle for the distribution of bandwidth, namely according to the bandwidth of each grouping user of traffic carrying capacity dynamic conditioning, when service traffics raise, increases bandwidth, when service traffics reduce, reduces bandwidth.Like this, the QoS (Quality of Service, service quality) of guarantee business of trying one's best on the one hand, makes resource utilization ratio reach the highest on the other hand.On the other hand, due to the restriction of TD resource, when resource is nervous, user, by with the resource being less than its application access, then passes through RBC algorithm dynamic allocation of resources, to improve user's access rate.When intra-cell users is many, community, close to time at full capacity, can not ensure the bandwidth that all Packet Services can both obtain it and ask.Under these conditions, will such situation be there will be: the speed ratio of some user is higher, after first to file resource, take higher bandwidth always; Then apply for that the user of resource but can not get the bandwidth of asking for a long time, speed is always lower.This is " First come first served " with regard to making business for the competition of DCH resource, thus causes the service quality between business to have very large difference when resource is nervous.

Summary of the invention

The object of this invention is to provide a kind of resource dynamic distributing method for PS business on DCH, when wireless bandwidth resource anxiety, balance the bandwidth resource allocation between all Packet Services, utilize cell capacity to greatest extent, priority and the fairness of different business can be taken into account again simultaneously.Simultaneously in order to prevent user's reprovision adjustresources repeatedly, need to select according to the business of certain principle to " being deprived " resource, adjustment of no longer rattling after making each business be in balance.

Technical scheme of the present invention is as follows:

When 1.RNC decision-making needs the PS business for DCH to increase wireless bandwidth, if local resource is enough, then PS business completes raising speed reprovision on DCH; If local resource is not enough, then go to step 2;

2. according to reduction of speed service selection policy selection PS business reduction of speed:

By reduction of speed service selection strategy be:

1) should meet on DCH also can releasing resource for reduction of speed business, and the application priority after its reduction of speed is not higher than the application priority after resource request failure business raising speed;

2) if meet above-mentioned condition had multiple by reduction of speed PS business, then select the business reduction of speed that current application priority is minimum.

Reduction of speed object is all PS business be in the PS business of resource request failure in step 1 on the DCH of same frequency.

Reduction of speed business can adopt reduction of speed or blind landing speed as required.Reduction of speed as required, namely reduction of speed releasing resource should meet the raising speed demand of the PS business of resource request failure in step 1.Blind landing speed, namely reduces several rate level according to configuration.

Above-mentioned application priority, can be obtained (effect as shown in Figure 1) by business base priority and current DCH Rate mapping, base priority is lower and business present rate is higher, then apply priority lower.Base priority is wherein relevant with type of service, ARP, business maximum rate etc.

3., after reduction of speed success, the business of resource request failure in step 1 is received.If the reduction of speed failure of step 2, initiates the down speeding procedure of step 2 again after can waiting for certain hour.If it is all failed to initiate repeatedly down speeding procedure continuously, then process ends.

By the technical scheme that the present invention discloses, User Priority can be taken into account with fairness to balance the Resourse Distribute of the PS business on DCH: for the business that base priority is identical, its DCH bandwidth is suitable; For the business of different base priority, high-priority service takies more DCH bandwidth resources in a suitable scope.Thus, the satisfaction of different business is in poised state in a suitable scope, and table tennis adjustment can not occur.

Accompanying drawing illustrates:

The schematic flow sheet of Fig. 1 wireless bandwidth resource dynamic assignment of the present invention

The application priority configuration schematic diagram of Fig. 2 embodiment of the present invention

The Resource dynamic allocation result schematic diagram of Fig. 3 embodiment of the present invention

Embodiment

Introducing specific embodiment of the invention process for descending wireless bandwidth resource can.

Only have a frequency in community, its total resources are 480Kbps, access that three maximum rates are 384Kbps (initial access rate is 32K) business PS1, PS2, PS3 are all carried on DCH successively, and its user's base priority is 3.The rate level of business on DCH is 16Kbps, 32Kbps, 64Kbps, 128Kbps, 256Kbps, 384Kbps, and the configuration of application priority as shown in Figure 2 (1 is lowest priority, and 9 is limit priority).The minimum speed limit of three business on DCH is 32Kbps.

Suppose that local resource can utilize completely, PS1, PS2, PS3 all have the bandwidth demand of 384Kbps.Reduction of speed business adopts reduction of speed mode (namely reduction of speed business reduces a rate level at every turn) step by step, and request resource increases business and adopts raising speed mode (namely reduction of speed business reduces a rate level at every turn) step by step.

After 1.PS1 accesses community with 32Kbps, due to data transfer demands, progressively after raising speed to 256Kbps, PS2 accesses community (the t1 moment in Fig. 2) with 32Kbps.

2. after this, when PS1 and PS2 difference raising speed is to 384Kbps and 64Kbps, PS3 accesses community (the t2 moment in Fig. 2) with 32Kbps.Now local resource is fully utilized.

3.RNC adjudicates PS3 to be needed to increase bandwidth to 64Kbps, but does not have surplus resources due to community, and therefore finding in the cell can reduction of speed business.PS1 and PS2 all can releasing resource, but the application priority according to Fig. 2 configures, PS1 is only had to meet the application priority (3) after reduction of speed not higher than the application priority (5) after PS3 raising speed, therefore, select PS1 reduction of speed to 256Kbps (the t3 moment in Fig. 2).

After the success of 4.PS1 reduction of speed, PS3 raising speed is to 64Kbps (the t4 moment in Fig. 2).

5. after this, RNC adjudicates PS2 to be needed to increase bandwidth to 128Kbps, and have surplus resources 96Kbps due in now community, can meet PS2 raising speed demand, therefore PS2 raising speed is to 128K (the t5 moment in Fig. 2).

6. after this, RNC adjudicates PS3 to be needed to increase bandwidth to 128Kbps, and the surplus resources now in community is 32Kbps, can not meet the raising speed demand of PS3, and therefore finding in the cell can reduction of speed business.PS1 and PS2 all can releasing resource, but the application priority according to Fig. 2 configures, PS1 is only had to meet the application priority (4) after reduction of speed not higher than the application priority (4) after PS3 raising speed, therefore, select PS1 reduction of speed to 128Kbps (the t6 moment in Fig. 2).

After the success of 7.PS1 reduction of speed, PS3 raising speed is to 128Kbps (the t7 moment in Fig. 2).

8. now, in community, surplus resources is 96Kbps, is not enough to the arbitrary business raising speed made in PS1, PS2, PS3.Meanwhile, when the arbitrary business in PS1, PS2, PS3 has bandwidth to increase demand, the application priority both all the other does not all meet the requirement of reduction of speed business yet, therefore PS1, PS2, PS3 all with 128K stable existence in community.

Above-mentioned Radio Resource dynamic allocation procedure as shown in Figure 3.Moment in figure only shows the sequencing that event occurs, and its moment spacing does not reflect real time span.

Claims

1. a wireless bandwidth resource dynamic allocation method, is characterized in that comprising following steps:

Step 1), base station controller decision-making need for DCH channel PS business increase wireless bandwidth time,

If local resource is enough, then PS business completes raising speed reprovision on DCH channel; If local resource is not enough, then go to step 2);

Step 2), according to reduction of speed service selection policy selection PS reduction of speed object reduction of speed:

Described reduction of speed service selection strategy is:

A) should meet on DCH also can releasing resource for reduction of speed PS business, and the application priority after its reduction of speed is not higher than the application priority after resource request failure business raising speed;

If the reduction of speed PS business b) meeting above-mentioned condition has multiple, then select the business reduction of speed that current application priority is minimum;

Step 3), reduction of speed success after, the business of resource request failure in step 1 is received.

2. the method for claim 1, is characterized in that: described step 2) in reduction of speed object be and step 1) in the PS business of resource request failure be in all PS business on the DCH of same frequency.

3. method as claimed in claim 2, is characterized in that: described step 2) in reduction of speed can adopt reduction of speed or blind landing speed as required; Reduction of speed as required, namely reduction of speed releasing resource should meet step 1) in the raising speed demand of PS business of resource request failure; Blind landing speed, namely reduces several rate level according to configuration.

4. as claim 3 the method that describes, it is characterized in that: described step 2) in application priority, obtained by business base priority and current DCH Rate mapping.