CN104918333A - Scheduling method for Non-GBR service - Google Patents

Abstract

The invention discloses a scheduling method for a Non-GBR service. When the Non-GBR service is built, according to the type of the Non-GBR service, the lowest satisfactory rate of the Non-GBR service is set; the average service rate of all to-be-scheduled services is calculated, whether the average service rate is larger than the lowest satisfactory rate of the Non-GBR service is judged, if yes, first priority algorithm is used for calculating the priority of the Non-GBR services, or otherwise, second priority algorithm is used for calculating the priority of the Non-GBR services; and according to the order of the priority from high to low, resource allocation is sequentially carried out on all to-be-scheduled services. Through applying the technical scheme of the invention, on the basis of ensuring each Non-GBR service in different channel conditions to obtain certain service, balance between the system throughput and user fairness can be ensured as much as possible.

Description

A kind of dispatching method for Non-GBR business

Technical field

The application relates to wireless communication technology field, particularly relates to a kind of dispatching method for Non-GBR business.

Background technology

In LTE system, the basic granularity that service quality (QoS) controls is radio bearer, namely all data flow in same bearer ensure obtaining identical QoS (as scheduling strategy, buffering queue management, link layer configuration etc.), different QoS ensures needs dissimilar Evolved Packet System (EPS) carrying to provide.

According to the difference of QoS, radio bearer can be divided into two large classes: ensure bit rate (GBR) and non-guaranteed bit rate (Non-GBR).So-called GBR, refer to that the bit rate of load bearing requirements is distributed consistently by network " forever ", even if when Internet resources anxiety, corresponding bit rate also can keep.Maximum bit rate (MBR) parameter defines under GBR is carried on the condition of resource abundance, the rate-limit that can reach.The value of MBR is likely more than or equal to the value of GBR.Contrary, Non-GBR refers to when network congestion, and business (or carrying) needs the requirement of bearing changing down, because Non-GBR carrying does not need to take fixing Internet resources, thus can set up for a long time.And GBR carrying is generally just just set up when needed.

In Access Network, the QoS of upper carrying of eating dishes without rice or wine is controlled by base station (eNodeB), and each carrying has corresponding qos parameter service quality rating to indicate (QCI) and distributes reserved priority (ARP).

QCI is applied to GBR and Non-GBR carrying simultaneously.A QCI is a value, and comprise the indexs such as priority, packet delay and acceptable Packet Error Ratio, each QCI is associated with a priority, and priority 1 is the highest priority level.The value of the QCI of radio bearer determines its processing policy at eNB.

Define the value of nine kinds of different QCI in standard, what interface transmitted is the value of QCI instead of the QoS attribute of its correspondence.By the standardization to QCI, can the different producer of specification for the understanding of corresponding QoS business and process, convenient interconnection and interflow in multi-vendor interconnection environment and roaming environments between distinct device/system.

In current LTE system scheduling mechanism, because Non-GBR business itself is not to the requirement of speed, usually adopt the dispatching algorithm dispatching servicess such as poll, max carrier to interference, Proportional Fair.Poll and max carrier to interference all do not consider the characteristic of business itself, and just inquiry or foundation channel condition are dispatched successively.And for Proportional-Fair algorithm, exactly because Non-GBR business does not have rate requirement, so Proportional-Fair algorithm cannot be used to carry out calculating priority level.Therefore, common dispatching algorithm cannot ensure that each Non-GBR business all can obtain required QoS service.

Summary of the invention

This application provides a kind of dispatching method for Non-GBR business, under guarantee different channels condition, each Non-GBR business obtains on the basis of certain service, maximizes the balance ensureing throughput of system and user fairness as far as possible.

A kind of dispatching method for Non-GBR business that the embodiment of the present application provides, comprising:

A, when Non-GBR business is set up, according to the type of this Non-GBR business, set the minimum satisfactory rate of this Non-GBR business;

B, add up the business Mean Speed of all Non-GBR business to be scheduled, judge whether described business Mean Speed is greater than the minimum satisfactory rate of this Non-GBR business, if, the priority of this Non-GBR business is calculated with the first priority algorithm, otherwise, the priority of this Non-GBR business is calculated with the second priority algorithm; Adopt in all Non-GBR business of the first priority algorithm, business Mean Speed is directly proportional to channel condition to the ratio of the minimum satisfactory rate of this corresponding class Non-GBR business; Adopt in all Non-GBR business of the second priority algorithm, the priority of the Non-GBR business that business Mean Speed is lower is higher;

C, according to priority order from high to low, carry out Resourse Distribute successively to there being Non-GBR business to be scheduled.

Preferably, described minimum satisfactory rate is that this Non-GBR type of service is in the most not good enough desired speed in edge.

Preferably, the computing formula of described first priority algorithm is:

wherein, priority is the priority of this Non-GBR business; Rate_ave is that statistics obtains business Mean Speed; CQI_Index is the current channel quality index of this business, and span is (0,15); SBR is minimum satisfactory rate.

Preferably, the computing formula of described second priority algorithm is:

$\mathrm{priority}=(1-\frac{\mathrm{Rate}\_\mathrm{ave}}{\mathrm{SBR}})*100+N;$

Wherein, priority is the priority of this Non-GBR business; Rate_ave is that statistics obtains business Mean Speed; SBR is minimum satisfactory rate; N is the Priority Base ensureing that Mean Speed sets higher than the priority reaching SBR business lower than the priority of SBR business, span (16,1000).

Preferably, described N equals 100.

As can be seen from the above technical solutions, for dissimilar Non-GBR traffic differentiation satisfaction, to being satisfied with business, dissatisfied business adopts different priority computational methods, the priority of dissatisfied business is made to reduce along with Mean Speed and raise, thus the business making Mean Speed lower is preferentially dispatched, and the business that is satisfied with adopts the Proportional Fair dispatching algorithm improved, thus maximize the balance ensureing throughput of system and user fairness.

Accompanying drawing explanation

The dispatching method flow chart for Non-GBR business that Fig. 1 provides for the embodiment of the present application.

Embodiment

This application provides a kind of dispatching method for Non-GBR business, the design philosophy of the method is: for dissimilar Non-GBR traffic differentiation satisfaction, and to being satisfied with business, dissatisfied business adopts different priority computational methods.Specifically, for the Non-GBR type of service of different QoS requirements defines minimum satisfactory rate, the Non-GBR business of different QoS requirements type has different minimum satisfactory rate; When computing service priority, obtain the Mean Speed of each business according to statistics, for the business of Mean Speed lower than the minimum satisfactory rate of Non-GBR business, the service priority that Mean Speed is lower is higher, is preferentially dispatched; For the business of Mean Speed higher than the minimum satisfactory rate of Non-GBR business, then adopt the Proportional Fair dispatching algorithm of improvement, business Mean Speed is directly proportional, to maximize the balance ensureing throughput of system and user fairness to channel condition to the ratio of the minimum satisfactory rate of this corresponding class Non-GBR business.

For making the know-why of technical scheme, feature and technique effect clearly, below in conjunction with specific embodiment, technical scheme is described in detail.

The dispatching method flow process for Non-GBR business that the embodiment of the present application provides as shown in Figure 1, comprises the steps:

Step 101: when Non-GBR business is set up, is in the minimum satisfactory rate (SBR, atisfied Bit Rate) of the most not good enough desired this business of rate setting in edge according to different types of service.

For reaching present techniques object, requiring that dissimilar Non-GBR business has different minimum satisfactory rate, but the concrete mode arranging minimum satisfactory rate is not construed as limiting.What the embodiment of the present application proposed arranges minimum satisfactory rate be only example, not in order to limit the application's scheme according to being in the most not good enough desired speed in edge.

Step 102: the priority calculating each Non-GBR business.

For the business of Rate_ave<=SBR, be defined as dissatisfied business, priority is:

$\mathrm{priority}=(1-\frac{\mathrm{Rate}\_\mathrm{ave}}{\mathrm{SBR}})*100+N;$

For the business of Rate_ave>SBR, be defined as the business of satisfaction, priority computing formula is:

$\mathrm{priority}=\frac{\mathrm{CQI}\_\mathrm{Index}}{\frac{\mathrm{Rate}\_\mathrm{ave}}{\mathrm{SBR}}}$

Wherein:

Priority is the priority of this business;

Rate_ave is that statistics obtains business Mean Speed;

CQI_Index is the current channel quality index of this business, for defining in LTE protocol, and span

For (0,15);

N is the Priority Base ensureing that Mean Speed sets higher than the priority reaching SBR business lower than the priority of SBR business, recommendation 100, span (16,1000).

For being satisfied with in the computing formula of business, molecular moiety also can be deformed into other parameters associated with channel quality, such as: map the channel quality parameter obtained according to CQI_Index, the data meeting certain proportion or requirement can be designed to, can reach and the speed of the business of different channels quality is controlled.

Step 103: according to priority order from high to low, carries out Resourse Distribute successively to there being Non-GBR business to be scheduled.

The foregoing is only the preferred embodiment of the application; not in order to limit the protection range of the application; within all spirit in technical scheme and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the application protects.

Claims (5)

1. for a dispatching method for Non-GBR business, it is characterized in that, comprising:

A, when Non-GBR business is set up, according to the type of this Non-GBR business, set the minimum satisfactory rate of this Non-GBR business;

B, add up the business Mean Speed of all Non-GBR business to be scheduled, judge whether described business Mean Speed is greater than the minimum satisfactory rate of this Non-GBR business, if, the priority of this Non-GBR business is calculated with the first priority algorithm, otherwise, the priority of this Non-GBR business is calculated with the second priority algorithm; Adopt in all Non-GBR business of the first priority algorithm, business Mean Speed is directly proportional to channel condition to the ratio of the minimum satisfactory rate of this corresponding class Non-GBR business; Adopt in all Non-GBR business of the second priority algorithm, the priority of the Non-GBR business that business Mean Speed is lower is higher;

C, according to priority order from high to low, carry out Resourse Distribute successively to there being Non-GBR business to be scheduled.

2. method according to claim 1, is characterized in that, described minimum satisfactory rate is that this Non-GBR type of service is in the most not good enough desired speed in edge.

3. method according to claim 1, is characterized in that, the computing formula of described first priority algorithm is: wherein, priority is the priority of this Non-GBR business; Rate_ave is that statistics obtains business Mean Speed; CQI_Index is the current channel quality index of this business, and span is (0,15); SBR is minimum satisfactory rate.

4. method according to claim 1, is characterized in that, the computing formula of described second priority algorithm is:

$\mathrm{priority}=(1-\frac{\mathrm{Rate}\_\mathrm{ave}}{\mathrm{SBR}})*100+N;$

Wherein, priority is the priority of this Non-GBR business; Rate_ave is that statistics obtains business Mean Speed; SBR is minimum satisfactory rate; N is the Priority Base ensureing that Mean Speed sets higher than the priority reaching SBR business lower than the priority of SBR business, span (16,1000).

5. method according to claim 4, is characterized in that, described N equals 100.