CN102651865B - Packet data service priority scheduling method and system - Google Patents

Abstract

The present invention relates to a kind of Packet data service priority scheduling method, comprising: the access terminal service class that sends of authenticating and charging receive centre promotes indication information; Carry out authentication to accessing terminal, authentication carries out service class renewal after passing through; Service level information after upgrading is sent to access network equipment through gateway; Access network equipment calculates wireless dispatching parameter according to the service level information after renewal, and carries out priority scheduling operation according to wireless dispatching parameter to accessing terminal.The invention still further relates to a kind of Packet data service priority scheduling system.The present invention provides the priority service requests and scheduling feature provided during Packet data service based on user's request for user, when user needs the service quality of higher rate, can independently initiate high priority service requests, access network equipment can according to the service class of user's application, when allocation of radio resources for user carries out other scheduling of higher priority, the speed realizing doing one's best preferentially ensures, and completes corresponding charging.

Description

Packet data service priority scheduling method and system

Technical field

The present invention relates to wireless communication field, particularly relate to a kind of Packet data service priority scheduling method and system.

Background technology

Along with people are to the continuous increase of mobile data services demand, mobile communication system supports that the ability of high-speed data also constantly strengthens.Evolution version EV-DO as CDMA2000 supports high-speed packet transmission ability for mobile communication system and designs, and can provide the peak rate of forward direction 3.1Mbps.For data service feature, EV-DO system have employed rate control techniques, travelling carriage measures a pilot tone C/I at each time slot, predicts the maximum transmission rate that can support, and by reverse DRC (DataRateControl) channel to base station repeats.Base station, according to each travelling carriage feedack, adopts certain wireless resource scheduling algorithm, from the travelling carriage of request transmission, select a user to distribute radio open resource.

In high speed data transfer situation, dispatching priority rank can be determined for the user of request for data transmission by wireless resource scheduling, and be user's distributing radio resource according to priority level, for user provides service.Mainly use at present a kind of proportional fair scheduling according to channel fading process adaptively for transmitting and scheduling user in a wireless communication system, this algorithm by conjunction with user's current radio environment quality and the acquired throughput of user two because usually determining the dispatching priority rank of user.But the method is not for the data communication of assigned priority provides certain QoS (service quality) to ensure, and dispatching method is realized by base station and controls, all users are made no exception, does not consider the individual needs of user, be difficult to the service realizing differentiation.

Summary of the invention

The object of the invention is to propose a kind of Packet data service priority scheduling method and system, can for the individual demand of user for user provides scheduling of resource function flexibly.

For achieving the above object, the invention provides a kind of Packet data service priority scheduling method, comprising:

The access terminal service class that sends of authenticating and charging receive centre promotes indication information;

Authentication is carried out to described accessing terminal in described authenticating and charging center, and authentication carries out service class renewal by rear according to described service class lifting indication information;

Service level information after renewal is sent to access network equipment through gateway by described authenticating and charging center;

Described access network equipment calculates corresponding wireless dispatching parameter according to the service level information after the described renewal received, and carries out priority scheduling operation according to described wireless dispatching parameter to described accessing terminal.

Further, when release connection, the former service class accessed terminal described in the recovery of described authenticating and charging center.

Further, access terminal before the service class that sends promotes the operation of indication information at described authenticating and charging receive centre, comprising:

Described accessing terminal is connected by access network equipment and Packet Control Function equipment and gateway;

Described accessing terminal to described gateway sends authentication request, and described authentication request comprises service class and promotes indication information;

Described gateway sends access request to described authenticating and charging center, and described access request comprises authentication information and service class promotes indication information.

Further, authentication is carried out to described accessing terminal in described authenticating and charging center, and authentication is specially by the rear operation carrying out service class renewal according to described service class lifting solicited message:

Described authenticating and charging center accesses terminal whether possess the authority of service class change described in confirming according to the authentication information in the access request received, possess the authority that service class changes if accessed terminal described in determining, then promote the service class in the USI user service information of preserving at described authenticating and charging center according to described service class lifting solicited message.

Further, the operation that the service level information after renewal is sent to access network equipment through gateway is specially by described authenticating and charging center:

Described authenticating and charging center sends access to described gateway and accepts message, and described access accepts message and comprises described USI user service information;

Service level information after renewal is sent to described access network equipment according to described USI user service information by described gateway.

Further, when the service level information after renewal being sent to access network equipment through gateway at described authenticating and charging center, also comprise:

Described authenticating and charging center performs the billing operation of the Freight Basis corresponding with the service level information after renewal to described accessing terminal;

When release connection, the former service class accessed terminal described in the recovery of described authenticating and charging center, and terminate described billing operation.

Further, described when release connection, described authenticating and charging center recover described in the former service class that accesses terminal, and terminate described billing operation and be specially:

When release connection, described Packet Control Function equipment sends registration request to gateway, activates the operation stopping the station message recording;

Described gateway sends charging ending request to described authenticating and charging center;

The former service level information that described authenticating and charging center accesses terminal according to described charging ending request recovery, and complete the release of connection.

Further, described access request comprises multiple message field, be respectively code message territory, identifier information territory, request authentication word message field and attribute message territory, described code message domain representation type of message, described identifier information domain representation COS, described request certification word message field comprises the authentication information for authentication, and described attribute message territory comprises service class and promotes indication information.

Further, the operation that described access network equipment calculates corresponding wireless dispatching parameter according to the service level information after the described renewal received specifically comprises:

Described access network equipment calculates corresponding nominal according to the service level information that described service class promotes in solicited message and ensures speed, and computing formula is

$R_{\mathrm{GBR}}\left(i\right)=R_{\mathrm{def}}\×\exp \left[\frac{\mathrm{Class}\left(i\right)}{C}\right],i=\mathrm{1,2},...,N$

Wherein R _gBRi () represents that the nominal of user i ensures speed, R _defrepresent default rate, Class (i) represents that the service class that user i asks, C are constant, and N represents online user's sum that access network equipment is served;

Described access network equipment determine according to channel capacity described in the current instantaneous peak transfer rate that accesses terminal and the described acquired average transmission rate that accesses terminal;

Described access network equipment according to described in the current instantaneous peak transfer rate that accesses terminal and acquired average transmission rate and described nominal ensure that speedometer calculates the corresponding user class of service as wireless dispatching parameter, computing formula is

$S\left(i\right)=\frac{{\mathrm{DRC}}_i\left(t\right)}{R_i\left(t\right)}\×P_i\left(t\right)$

Wherein DRC _it () represents the current instantaneous peak transfer rate at moment t, R _it () represents the acquired average transmission rate of user i at moment t, P _it () represents the user rate guarantee function at moment t;

Average transmission rate R _it () upgrades by following formula:

$R_i(t+\mathrm{\Δt})=(1-\frac{1}{T_c})R_i\left(t\right)+\frac{1}{T_c}*\mathrm{Current}\_\mathrm{Transmission}\_\mathrm{Rate}\_\mathrm{of}\_\mathrm{User}\_i$

Wherein T _cfor time constant, represent the length of sliding time window, Current_Transmission_Rate_of_User_i represents the transfer rate that i-th user is current;

P _it the computing formula of () is

$P_i\left(t\right)=\left\{\begin{array}{cc}\exp \left\{\mathrm{\&lambda;}\right[1-\frac{R_i\left(t\right)}{R_{\mathrm{GBR}}\left(i\right)}\left]\right\}& R_i\left(t\right)<R_{\mathrm{GBR}}\left(i\right)\\ 1& R_i\left(t\right)\&GreaterEqual;R_{\mathrm{GBR}}\left(i\right)\end{array}\right.$

Wherein λ is constant.

Further, if the service class that there is multiple user request in the Serving cell corresponding to access network equipment meets the high and the most identical situation of priority, then described multiple user is formed high priority user set, and according to DRC from this high priority user set _it the numerical values recited of () chooses user dispatches.

For achieving the above object, the invention provides a kind of Packet data service priority scheduling system, comprising:

Authenticating and charging center, indication information is promoted for receiving the service class sent that accesses terminal, and authentication is carried out to described accessing terminal, authentication carries out service class renewal by rear according to described service class lifting indication information, then the service level information after renewal is sent to access network equipment through gateway;

Access network equipment, for calculating corresponding wireless dispatching parameter according to the service level information after the described renewal received, and carries out priority scheduling operation according to described wireless dispatching parameter to described accessing terminal.

Based on technique scheme, the present invention provides the priority service requests and scheduling feature provided during Packet data service based on user's request for user, when user needs the service quality of higher rate, can independently initiate high priority service requests, access network equipment can according to the service class of user's application, when allocation of radio resources for user carries out other scheduling of higher priority, the speed realizing doing one's best preferentially ensures, and completes corresponding charging.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the schematic network structure of a kind of application scenarios of Packet data service priority scheduling embodiment of the method for the present invention.

Fig. 2 is the schematic flow sheet of an embodiment of Packet data service priority scheduling method of the present invention.

Fig. 3 is the schematic diagram of connection building process in another embodiment of Packet data service priority scheduling method of the present invention.

Fig. 4 is the schematic diagram of Connection Release flow process in the another embodiment of Packet data service priority scheduling method of the present invention.

Fig. 5 is the calculation process of wireless dispatching parameter in an embodiment again of Packet data service priority scheduling method of the present invention.

Fig. 6 is the structural representation of an embodiment of Packet data service priority scheduling system of the present invention.

Embodiment

Below by drawings and Examples, technical scheme of the present invention is described in further detail.

Existing wireless communication system (base station and base station controller) lacks scheduling of resource means flexibly when the individual demand for user.The service class of user, once determine, cannot change flexibly in business use procedure, cannot meet user's oneself service class of (as process urgency traffic) temporary needs lifting in some scenarios, obtain the demand of higher wireless data rates.

Present invention is directed at this technical problem of prior art, propose the embodiment of several Packet data service priority scheduling method, as shown in Figure 1, is the schematic network structure of a kind of application scenarios of Packet data service priority scheduling embodiment of the method for the present invention.The application scenarios of the present embodiment is to support the CDMA2000 system of 1xEV-DO specification, in this network configuration, access terminal AT is connected with the base station BTS in access network equipment AN, AN is connected with gateway PDSN, and PDSN is connected with authenticating and charging center AAA, and is connected into Internet.The present invention can also support other 3G wireless system, such as WCDMA system etc.

As shown in Figure 2, be the schematic flow sheet of an embodiment of Packet data service priority scheduling method of the present invention.In the present embodiment, Packet data service priority scheduling method comprises:

The access terminal service class that sends of step 101, authenticating and charging receive centre promotes indication information;

Step 102, described authenticating and charging center carry out authentication to described accessing terminal, and authentication carries out service class renewal by rear according to described service class lifting indication information;

Service level information after renewal is sent to access network equipment through gateway by step 103, described authenticating and charging center;

Step 104, described access network equipment calculate corresponding wireless dispatching parameter according to the service level information after the described renewal received, and carry out priority scheduling operation according to described wireless dispatching parameter to described accessing terminal.

In the present embodiment, when user needs to deal with urgent work, service class can be sent by accessing terminal to authenticating and charging center and promote indication information, this service class promotes the service class that indication information includes the desired application of user, usually above current service level, to obtain the service quality of higher rate.

Authenticating and charging center promotes indication information to service class and examines, and guarantees that having permission user uses this reliability of service and validity.This service level information, after the service level information promoting self preservation of indication information renewal according to service class, is sent to access network equipment by authenticating and charging center, carries out actual priority scheduling operate by access network equipment.And when release connection, the former service class accessed terminal can be recovered in authenticating and charging center, with releasing resource.

By the Packet data service priority scheduling method in the present embodiment, scheduling of resource means flexibly can be provided when user has individual demand, especially (service quality of higher rate is such as needed to process urgency traffic etc.) in some scenarios for user and high service class can be provided, obtain the function of higher wireless data rates.

As shown in Figure 3, be the schematic diagram of connection building process in another embodiment of Packet data service priority scheduling method of the present invention.The network architecture of the present embodiment is for CDMA2000EVDO network, and connection building process specifically comprises:

Step 201, access terminal AT make a call foundation, and access terminal AT and access network equipment AN set up session;

Step 202, access network equipment AN send A9-and set up-A8 message to Packet Control Function equipment PCF, and application is set up A8 and connected;

Step 203, Packet Control Function equipment PCF with set up A10/A11 between gateway PDSN and be connected;

Step 204, Packet Control Function equipment PCF return A9-to access network equipment AN and connect-A8 message;

Step 205, access terminal AT are initiated to be connected with the PPP between gateway PDSN and for LCP (LinkControlProtocol the is called for short LCP) negotiation of access authentication;

Step 206, access terminal AT send authentication request (AuthenticationRequest) to gateway PDSN, and authentication request comprises service class and promotes indication information;

Step 207, gateway PDSN send access request (AccessRequest) to authenticating and charging center AAA, and access request comprises authentication information (such as user name, password etc.) and service class promotes indication information;

According to the authentication information in the access request received, step 208, authenticating and charging center AAA confirm whether this access terminal AT possesses the authority of service class change, if determine that this access terminal AT possesses the authority of service class change, then promote the service class (Interuserpriority) in the USI user service information (SubscriberQosProfile) of solicited message lifting preservation according to service class;

Step 209, authenticating and charging center AAA send access to gateway PDSN and accept message (AccessAccept), accept message and comprise USI user service information;

Step 210, gateway PDSN complete verification process, and according to USI user service information, the service level information after renewal are sent to access network equipment AN;

Step 211, PPP connection establishment, grouped data can transmit between access terminal AT and gateway PDSN;

Step 212, access network equipment AN calculate corresponding wireless dispatching parameter according to the service level information after the renewal received, and carry out priority scheduling operation according to described wireless dispatching parameter to described accessing terminal.

In the present embodiment, step 201 ~ 204 achieve under CDMA2000EVDO network, and accessed terminal this process connected by access network equipment and Packet Control Function equipment and gateway.

In access request message (AccessRequest) in the present embodiment step 206 except authentication information, also comprise service class and promote indication information, and access request message can comprise multiple message field, be respectively code (Code) message field, identifier (Identifier) message field, request authentication word (RequestAuthenticator) message field and attribute (Attributes) message field.The message format of this access request message is as follows:

code

Identifier

Length

Request Authenticator

Attributes

Wherein Length represents the length of this access request message.

Code message domain representation type of message, such as numerical value 1 represents that this message is access request.Request authentication word message field comprises the authentication information for authentication, attribute message territory comprises service class and promotes indication information, its length is variable, and comprise multiple attribute type, and each attribute type can also comprise multiple message field further, such as type Type, length Length and property value Value, form is as follows:

Type

Length

Value

When wherein the numerical value of such as Type is 6, represent COS Service, and Value message field can account for 4 bytes, comprising:

Value value	Explanation
		1	Login
2	Framed
		...	...
11	Callback Administrative

Wherein increase Value numerical value 12 and promote indication information (ServiceClassUpgrade) as service class.

The format information of message given above only understands the citing of the present invention program for convenience, and unrestricted, and those skilled in the art can adjust the definition of message format and each message language as required, to realize each process step of the present invention.

The requirement improving service class is required for user, can also charge further in authenticating and charging center, to ensure the differentiation of high precedence service and common grade service charge, when the service level information after renewal is sent to access network equipment through gateway by authenticating and charging center, authenticating and charging center performs the billing operation of the Freight Basis corresponding with the service level information after renewal to accessing terminal, accordingly, when release connection, the former service class accessed terminal described in the recovery of described authenticating and charging center, and terminate described billing operation.Give an example of the ticket writing for charging in following table, wherein increase new field value in PaidType payment type field, represent " charging of the XX grade of service ".

The format information of ticket writing given is above also only the citing conveniently understanding the present invention program, and unrestricted.

After user uses the data, services of the high priority of application, the recovery of former service class can be realized by release connection and stop charging.As shown in Figure 4, be the schematic diagram of Connection Release flow process in the another embodiment of Packet data service priority scheduling method of the present invention.In the present embodiment, still for CDMA2000EVDO network, Connection Release flow process comprises:

Step 301, user initiate connection release message by access terminal AT to access network equipment AN;

Step 302, access network equipment AN send A9-to Packet Control Function equipment PCF and discharge-A8 message;

Step 303, Packet Control Function equipment PCF return A9-release-A8 to access network equipment AN and complete message, complete the release that A8/A9 connects;

Step 304, Packet Control Function equipment PCF send registration request to gateway PDSN, activate the operation stopping the station message recording;

Step 305, gateway PDSN send charging ending request (AccountRequest (stop)) to authenticating and charging center AAA;

Step 306, authenticating and charging center AAA recover USI user service information (SubscriberQosProfile) Central Plains service level information (Interuserpriority) of access terminal AT according to the charging ending request received;

Step 307, authenticating and charging center AAA return charging response (Accountresponse) to gateway PDSN;

When step 308, gateway PDSN receive charging response, complete the release that PPP between access terminal AT is connected.

After sending user the requirement promoting service class, access network equipment calculates corresponding wireless dispatching parameter according to the service level information after the renewal received, and then carry out priority scheduling operation according to wireless dispatching parameter, this process can select multiple existing priority scheduling method, but existing proportional fair dispatching method does not distinguish the QoS characteristic of different user service, be therefore short of in addition providing in the data rate guarantee of doing one's best.And the invention provides a kind of wireless resource scheduling scheme can distinguishing the Qos demand of the different user grade of service, and can according to different service priority level for user provides the data rate of doing one's best guarantee, this flow process as shown in Figure 5, comprising:

Step 401, access network equipment AN calculate corresponding nominal according to the service level information that described service class promotes in solicited message and ensure speed, and computing formula is

$R_{\mathrm{GBR}}\left(i\right)=R_{\mathrm{def}}\&times;\exp \left[\frac{\mathrm{Class}\left(i\right)}{C}\right],i=\mathrm{1,2},...,N$

Wherein R _gBRi () represents that the nominal of user i ensures speed, R _defrepresent default rate, Class (i) represents that the service class that user i asks, C are constant, and N represents online user's sum that access network equipment is served;

Step 402, access network equipment determine according to channel capacity described in the current instantaneous peak transfer rate that accesses terminal and the described acquired average transmission rate that accesses terminal;

According to the current instantaneous peak transfer rate accessed terminal and acquired average transmission rate and described nominal, step 403, access network equipment ensure that speedometer calculates the corresponding user class of service as wireless dispatching parameter, computing formula is

$S\left(i\right)=\frac{{\mathrm{DRC}}_i\left(t\right)}{R_i\left(t\right)}\&times;P_i\left(t\right)$

Wherein DRC _it () represents the current instantaneous peak transfer rate at moment t, R _it () represents the acquired average transmission rate of user i at moment t, P _it () represents the user rate guarantee function at moment t;

Average transmission rate R _it () upgrades by following formula:

$R_i(t+\mathrm{\&Delta;t})=(1-\frac{1}{T_c})R_i\left(t\right)+\frac{1}{T_c}*\mathrm{Current}\_\mathrm{Transmission}\_\mathrm{Rate}\_\mathrm{of}\_\mathrm{User}\_i$

Wherein T _cfor time constant, represent the length of sliding time window, Current_Transmission_Rate_of_User_i represents the transfer rate that i-th user is current;

P _it the computing formula of () is

$P_i\left(t\right)=\left\{\begin{array}{cc}\exp \left\{\mathrm{\&lambda;}\right[1-\frac{R_i\left(t\right)}{R_{\mathrm{GBR}}\left(i\right)}\left]\right\}& R_i\left(t\right)<R_{\mathrm{GBR}}\left(i\right)\\ 1& R_i\left(t\right)\&GreaterEqual;R_{\mathrm{GBR}}\left(i\right)\end{array}\right.$

Wherein λ is constant.

If the service class that there is multiple user request in the Serving cell corresponding to access network equipment meets the high and the most identical situation of priority, then described multiple user is formed high priority user set, and according to DRC from this high priority user set _it the numerical values recited of () chooses user dispatches.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.

As shown in Figure 6, be the structural representation of an embodiment of Packet data service priority scheduling system of the present invention.Packet data service priority scheduling system in the present embodiment mainly comprises authenticating and charging center 1 and access network equipment 2.Wherein the service class lifting indication information sent that accesses terminal is responsible at authenticating and charging center 1, and authentication is carried out to described accessing terminal, authentication carries out service class renewal by rear according to described service class lifting indication information, then the service level information after renewal is sent to access network equipment through gateway.Access network equipment 2 is responsible for the service level information after according to the described renewal received and is calculated corresponding wireless dispatching parameter, and carries out priority scheduling operation according to described wireless dispatching parameter to described accessing terminal.

The instantiation of Packet data service priority scheduling system can carry out the division of functional module with reference to each embodiment of the method aforementioned, just no longer expand here.In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, same or analogous part cross-reference between each embodiment.For system embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.

Claims (9)

1. a Packet data service priority scheduling method, comprising:

The access terminal service class that sends of authenticating and charging receive centre promotes solicited message;

Authentication is carried out to described accessing terminal in described authenticating and charging center, and authentication carries out service class renewal by rear according to described service class lifting solicited message;

Service level information after renewal is sent to access network equipment through gateway by described authenticating and charging center;

Described access network equipment calculates corresponding wireless dispatching parameter according to the service level information after the described renewal received, and carries out priority scheduling operation according to described wireless dispatching parameter to described accessing terminal;

Access terminal before the service class that sends promotes the operation of solicited message at described authenticating and charging receive centre, comprising:

Described accessing terminal is connected by access network equipment and Packet Control Function equipment and gateway;

Described accessing terminal to described gateway sends authentication request, and described authentication request comprises service class and promotes solicited message;

Described gateway sends access request to described authenticating and charging center, and described access request comprises authentication information and service class promotes solicited message;

Wherein, the operation that described access network equipment calculates corresponding wireless dispatching parameter according to the service level information after the described renewal received specifically comprises:

Described access network equipment calculates corresponding nominal according to the service level information that described service class promotes in solicited message and ensures speed, and computing formula is

$R_{GBR}\left(i\right)=R_{def}\&times;\exp \&lsqb;\frac{Class\left(i\right)}{C}\&rsqb;,i=1,2,...,N$

Wherein R _gBRi () represents that the nominal of user i ensures speed, R _defrepresent default rate, Class (i) represents that the service class that user i asks, C are constant, and N represents online user's sum that access network equipment is served;

Described access network equipment determine according to channel capacity described in the current instantaneous peak transfer rate that accesses terminal and the described acquired average transmission rate that accesses terminal;

Described access network equipment according to described in the current instantaneous peak transfer rate that accesses terminal and acquired average transmission rate and described nominal ensure that speedometer calculates the corresponding user class of service as wireless dispatching parameter, computing formula is

$S\left(i\right)=\frac{{\mathrm{DRC}}_i\left(t\right)}{R_i\left(t\right)}\&times;P_i\left(t\right)$

Wherein DRC _it () represents the current instantaneous peak transfer rate at moment t, R _it () represents the acquired average transmission rate of user i at moment t, P _it () represents the user rate guarantee function at moment t;

Average transmission rate R _it () upgrades by following formula:

$R_i(t+\mathrm{\&Delta;}t)=(1-\frac{1}{T_c})R_i\left(t\right)+\frac{1}{T_c}*Current\_Transmission\_Rate\_of\_User\_i$

Wherein T _cfor time constant, represent the length of sliding time window, Current_Transmission_Rate_of_User_i represents the transfer rate that i-th user is current;

P _it the computing formula of () is

$P_i\left(t\right)=\left\{\begin{array}{cc}\exp \{\mathrm{\&lambda;}\&lsqb;1-\frac{R_i\left(t\right)}{R_{GBR}\left(i\right)}\&rsqb;\}& R_i\left(t\right)<R_{GBR}\left(i\right)\\ 1& R_i\left(t\right)\&GreaterEqual;R_{GBR}\left(i\right)\end{array}\right.$

Wherein λ is constant.

2. method according to claim 1, wherein, when release connection, the former service class accessed terminal described in the recovery of described authenticating and charging center.

3. method according to claim 2, wherein, authentication is carried out to described accessing terminal in described authenticating and charging center, and authentication is specially by the rear operation carrying out service class renewal according to described service class lifting solicited message:

Described authenticating and charging center accesses terminal whether possess the authority of service class change described in confirming according to the authentication information in the access request received, possess the authority that service class changes if accessed terminal described in determining, then promote the service class in the USI user service information of preserving at described authenticating and charging center according to described service class lifting solicited message.

4. method according to claim 3, wherein, the operation that the service level information after renewal is sent to access network equipment through gateway is specially by described authenticating and charging center:

Described authenticating and charging center sends access to described gateway and accepts message, and described access accepts message and comprises described USI user service information;

Service level information after renewal is sent to described access network equipment according to described USI user service information by described gateway.

5. method according to claim 2, wherein, when the service level information after renewal being sent to access network equipment through gateway at described authenticating and charging center, also comprises:

Described authenticating and charging center performs the billing operation of the Freight Basis corresponding with the service level information after renewal to described accessing terminal;

When release connection, the former service class accessed terminal described in the recovery of described authenticating and charging center, and terminate described billing operation.

6. method according to claim 5, wherein said when release connection, described authenticating and charging center recover described in the former service class that accesses terminal, and terminate described billing operation and be specially:

When release connection, described Packet Control Function equipment sends registration request to gateway, activates the operation stopping the station message recording;

Described gateway sends charging ending request to described authenticating and charging center;

The former service level information that described authenticating and charging center accesses terminal according to described charging ending request recovery, and complete the release of connection.

7. method according to claim 1, wherein said access request comprises multiple message field, be respectively code message territory, identifier information territory, request authentication word message field and attribute message territory, described code message domain representation type of message, described identifier information domain representation COS, described request certification word message field comprises the authentication information for authentication, and described attribute message territory comprises service class and promotes solicited message.

8. method according to claim 1, if the service class that wherein there is multiple user request in the Serving cell corresponding to access network equipment meets the high and the most identical situation of priority, then described multiple user is formed high priority user set, and according to DRC from this high priority user set _it the numerical values recited of () chooses user dispatches.

9. a Packet data service priority scheduling system, comprising:

Authenticating and charging center, solicited message is promoted for receiving the service class sent that accesses terminal, and authentication is carried out to described accessing terminal, authentication carries out service class renewal by rear according to described service class lifting solicited message, then the service level information after renewal is sent to access network equipment through gateway;

Access network equipment, for being connected by access network equipment and Packet Control Function equipment and gateway, and send authentication request to described gateway, described authentication request comprises service class and promotes solicited message, so that described gateway sends access request to described authenticating and charging center, described access request comprises authentication information and service class promotes solicited message, and calculate corresponding wireless dispatching parameter according to the service level information after the described renewal received, and according to described wireless dispatching parameter, priority scheduling operation is carried out to described accessing terminal,

Wherein, the operation calculating the wireless dispatching parameter of correspondence according to the service level information after the described renewal received specifically comprises:

Described access network equipment calculates corresponding nominal according to the service level information that described service class promotes in solicited message and ensures speed, and computing formula is

$R_{GBR}\left(i\right)=R_{def}\&times;\exp \&lsqb;\frac{Class\left(i\right)}{C}\&rsqb;,i=1,2,...,N$

Wherein R _gBRi () represents that the nominal of user i ensures speed, R _defrepresent default rate, Class (i) represents that the service class that user i asks, C are constant, and N represents online user's sum that access network equipment is served;

Described access network equipment determine according to channel capacity described in the current instantaneous peak transfer rate that accesses terminal and the described acquired average transmission rate that accesses terminal;

Described access network equipment according to described in the current instantaneous peak transfer rate that accesses terminal and acquired average transmission rate and described nominal ensure that speedometer calculates the corresponding user class of service as wireless dispatching parameter, computing formula is

$S\left(i\right)=\frac{{\mathrm{DRC}}_i\left(t\right)}{R_i\left(t\right)}\&times;P_i\left(t\right)$

Wherein DRC _it () represents the current instantaneous peak transfer rate at moment t, R _it () represents the acquired average transmission rate of user i at moment t, P _it () represents the user rate guarantee function at moment t;

Average transmission rate R _it () upgrades by following formula:

$R_i(t+\mathrm{\&Delta;}t)=(1-\frac{1}{T_c})R_i\left(t\right)+\frac{1}{T_c}*Current\_Transmission\_Rate\_of\_User\_i$

Wherein T _cfor time constant, represent the length of sliding time window, Current_Transmission_Rate_of_User_i represents the transfer rate that i-th user is current;

P _it the computing formula of () is

$P_i\left(t\right)=\left\{\begin{array}{cc}\exp \{\mathrm{\&lambda;}\&lsqb;1-\frac{R_i\left(t\right)}{R_{GBR}\left(i\right)}\&rsqb;\}& R_i\left(t\right)<R_{GBR}\left(i\right)\\ 1& R_i\left(t\right)\&GreaterEqual;R_{GBR}\left(i\right)\end{array}\right.$

Wherein λ is constant.