CN102651865A - Packet data service priority-scheduling method and system - Google Patents

Abstract

The invention relates to a packet data service priority-scheduling method, which comprises the following steps that: an authenticated billing center receives service class promoting indication information sent by an access terminal; the access terminal is authenticated, and service class update is carried out after the authentication is passed; the updated service class information is sent to access network equipment through a service gateway; and the access network equipment calculates wireless scheduling parameters according to the updated service class information and carries out priority scheduling operation to the access terminal according to the wireless scheduling parameters. The invention also relates to a packet data service priority-scheduling system. When the system provides a packet data service for a user, the system provides a priority service request based on a user demand and a scheduling function. When the user needs the service quality of higher rate, the system can automatically issue a higher priority service request, and the access network equipment can carry out scheduling of a higher priority level for the user during wireless resource allocation according to the service class applied by the user, so that the best rate priority security is realized, and the corresponding billing is completed.

Description

Packet data service priority scheduling method and system

Technical field

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

Background technology

Along with people's is to the continuous increase of mobile data services demand, and GSM supports the ability of high-speed data also constantly to strengthen.Support the high-speed packet transmittability to GSM and design like the evolution version EV-DO of CDMA2000, the peak rate of forward direction 3.1Mbps can be provided.To the data service characteristics, the EV-DO system has adopted rate control techniques, and travelling carriage is measured a pilot tone C/I at each time slot, predicts the maximum transmission rate that can support, and reports to the base station through reverse DRC (Data Rate Control) channel.Certain wireless resource scheduling algorithm is adopted according to each travelling carriage feedack in the base station, from the travelling carriage of request transmission, selects a user to distribute the radio open resource.

Under the high speed data transfer situation, can confirm the dispatching priority rank for the user of request for data transmission through wireless resource scheduling, and be user's distributing radio resource, for the user provides service according to priority level.In wireless communication system, mainly uses at present be a kind of be transmitting and scheduling user's Proportional Fair algorithm adaptively according to the channel fading process, this algorithm is confirmed user's dispatching priority rank through combination user's current wireless environmental quality and two factors of the acquired throughput of user.But this method ensures for the data communication of assigned priority provides certain QoS (service quality), and dispatching method realized and control by the base station, and all users are made no exception, and do not consider user's individual sexual demand, is difficult to realize the service of differentiation.

Summary of the invention

The objective of the invention is to propose a kind of Packet data service priority scheduling method and system, can for the user scheduling of resource function flexibly be provided to user's individual demand.

For realizing above-mentioned purpose, the invention provides a kind of Packet data service priority scheduling method, comprising:

The service class lifting indication information that the authenticating and charging center accesses terminal and sends;

Authentication is carried out to said accessing terminal in said authenticating and charging center, and authentication promotes indication information through the back according to said service class and carries out the service class renewal;

Service class information after said authenticating and charging center will be upgraded sends to access network equipment through gateway;

Said access network equipment goes out corresponding wireless dispatching parameter according to the service class information calculations after the said renewal that receives, and according to said wireless dispatching parameter said accessing terminal is carried out the priority scheduling operation.

Further, when discharging connection, the said former service class that accesses terminal is recovered at said authenticating and charging center.

Further, access terminal before the service class sent promotes the operation of indication information, comprising at said authenticating and charging center:

Said accessing terminal connects through access network equipment and Packet Control Function equipment and gateway;

Said accessing terminal sent authentication request to said gateway, comprises in the said authentication request that service class promotes indication information;

Said gateway sends the request of access to said authenticating and charging center, comprises in the said access request that authentication information and service class promote indication information.

Further, authentication is carried out to said accessing terminal in said authenticating and charging center, and the operation that authentication is carried out the service class renewal through the back according to said service class lifting solicited message is specially:

Said authenticating and charging center accesses terminal whether possess the authority of service class change according to the affirmation of the authentication information in the access request that receives is said; Possess the authority of service class change if confirm said accessing terminal, then promote solicited message and promote the service class in the USI user service information of preserving at said authenticating and charging center according to said service class.

Further, the service class information after said authenticating and charging center will be upgraded is specially through the operation that gateway sends to access network equipment:

The said gateway of mind-set sends and accepts message in the said authenticating and charging, and said access accepts to comprise in the message said USI user service information;

Service class information after said gateway will upgrade according to said USI user service information sends to said access network equipment.

Further, the service class information after said authenticating and charging center will be upgraded also comprises when gateway sends to access network equipment:

Said authenticating and charging center to said access terminal carry out with renewal after the billing operation of the corresponding Freight Basis of service class information;

When discharging connection, the said former service class that accesses terminal is recovered at said authenticating and charging center, and finishes said billing operation.

Further, said when discharge connecting, the said former service class that accesses terminal is recovered at said authenticating and charging center, and finishes said billing operation and be specially:

When discharging connection, said Packet Control Function equipment sends register requirement to gateway, activates the operation that stops the station message recording;

Said gateway sends the charging ending request to said authenticating and charging center;

The said former service class information that accesses terminal is recovered according to said charging ending request in said authenticating and charging center, and accomplishes the release that connects.

Further; Said access request comprises a plurality of message fields; Be respectively code message territory, identifier information territory, request authentication word message field and attribute message territory, said code message domain representation type of message, said identifier information domain representation COS; Described request authentication word message field comprises the authentication information that is used for authentication, and said attribute message territory comprises that service class promotes indication information.

Further, said access network equipment specifically comprises according to the operation that the service class information calculations after the said renewal that receives goes out corresponding wireless dispatching parameter:

Said access network equipment ensures speed according to the corresponding nominal of service class information calculations that said service class promotes in the solicited message, and computing formula does

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

R wherein _GBR(i) nominal of expression user i ensures speed, R _DefThe expression default rate, Class (i) expression user i requested service rank, C is a constant, N representes online user's sum that access network equipment is served;

Said access network equipment is confirmed said current instantaneous peak transfer rate that accesses terminal and the said acquired average transmission rate that accesses terminal according to channel capacity;

Said access network equipment ensures that according to the said current instantaneous peak transfer rate that accesses terminal and acquired average transmission rate and said nominal speedometer calculates the corresponding user class of service as the wireless dispatching parameter, and computing formula does

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

DRC wherein _i(t) be illustrated in the current instantaneous peak transfer rate of t constantly, R _i(t) be illustrated in the acquired average transmission rate of user i of t constantly, P _i(t) being illustrated in constantly, the user rate of t ensures function;

Average transmission rate R _i(t) pressing following formula upgrades:

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

T wherein _cBe time constant, the length of expression sliding time window, Current_Transmission_Rate_of_User_i representes i the transfer rate that the user is current;

P _i(t) computing formula does

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

Wherein λ is a constant.

Further; If in the pairing Serving cell of access network equipment, exist a plurality of user's requested service ranks to satisfy the high and the most identical situation of priority; Then said a plurality of users are formed high priority user set, and from this high priority user set according to DRC _i(t) numerical values recited is chosen the user and is dispatched.

For realizing above-mentioned purpose, the invention provides a kind of Packet data service priority scheduling system, comprising:

The authenticating and charging center; Be used to receive the service class lifting indication information that accesses terminal and send; And said accessing terminal carried out authentication; Authentication promotes indication information through the back according to said service class and carries out the service class renewal, and the service class information after will upgrading then sends to access network equipment through gateway;

Access network equipment is used for going out corresponding wireless dispatching parameter according to the service class information calculations after the said renewal that receives, and according to said wireless dispatching parameter said accessing terminal is carried out the priority scheduling operation.

Based on technique scheme; The present invention when for the user Packet data service being provided priority service requests and the scheduling feature based on user's request, when the user needs the service quality of higher rate, can independently initiate high priority service requests; Access network equipment can be according to the service class of user applies; When allocation of radio resources,, realize that the speed of doing one's best preferentially ensures, and accomplish corresponding the charging for the user carries out more other scheduling of high priority.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification 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 method embodiment of 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 sketch map of connection building process among another embodiment of Packet data service priority scheduling method of the present invention.

Fig. 4 is for connecting the sketch map of release flow among the another embodiment of Packet data service priority scheduling method of the present invention.

Fig. 5 is wireless dispatching CALCULATION OF PARAMETERS flow process among the 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

Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.

Existing wireless communication system (base station and base station controller) is lack flexible scheduling of resource means when being directed against user's individual demand.In a single day user's service class is confirmed, in professional use, can't change flexibly, can't satisfy user's (as handling urgency traffic) temporary needs under some scene and promote own service class, obtains the demand of higher wireless data rates.

Present invention is directed at this technical problem of prior art, proposed the embodiment of several kinds of Packet data service priority scheduling methods, as shown in Figure 1, be the schematic network structure of a kind of application scenarios of Packet data service priority scheduling method embodiment of the present invention.The application scenarios of present embodiment is an example with the CDMA2000 system that supports 1x EV-DO standard; Access terminal AT links to each other with base station BTS among the access network equipment AN in this network configuration; AN links to each other with gateway PDSN, and PDSN links to each other with authenticating and charging center AAA, and is connected into Internet.The present invention can also support other 3G wireless system, for example 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 service class lifting indication information that step 101, authenticating and charging center access terminal and send;

Authentication is carried out to said accessing terminal in step 102, said authenticating and charging center, and authentication promotes indication information through the back according to said service class and carries out the service class renewal;

Service class information after step 103, said authenticating and charging center will be upgraded sends to access network equipment through gateway;

Step 104, said access network equipment go out corresponding wireless dispatching parameter according to the service class information calculations after the said renewal that receives, and according to said wireless dispatching parameter said accessing terminal are carried out the priority scheduling operation.

In the present embodiment; When the user need deal with urgent work; Can send service class to the authenticating and charging center through accessing terminal and promote indication information; This service class promotes indication information and has comprised that the user hopes the service class of application, usually above the current service rank, so that obtain the service quality of higher rate.

The authenticating and charging center promotes indication information to service class and examines, and guarantees that having the right to limit the use of the family uses this reliability of service and validity.The authenticating and charging center sends to access network equipment with this service class information after the service class information that promotes indication information renewal self preservation according to service class, carry out actual priority scheduling operation by access network equipment.And when discharging connection, the former service class that the authenticating and charging center can recover to access terminal is to discharge resource.

Through the Packet data service priority scheduling method in the present embodiment; Scheduling of resource means flexibly can, the user be provided when having individual demand; Especially under some scene, (for example needing the service quality of higher rate to handle urgency traffic etc.) for the user can provide high service class, obtains the function of higher wireless data rates.

As shown in Figure 3, be the sketch map of connection building process among another embodiment of Packet data service priority scheduling method of the present invention.The network architecture of present embodiment is an example with CDMA2000 EVDO network, and connection building process specifically comprises:

The foundation that makes a call of step 201, access terminal AT, access terminal AT and access network equipment AN set up session;

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

Setting up A10/A11 between step 203, Packet Control Function equipment PCF and the gateway PDSN is connected;

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

Step 205, access terminal AT initiation are consulted with the LCP (Link Control Protocol is called for short LCP) that the PPP between the gateway PDSN is connected and is used for access authentication;

Step 206, access terminal AT are sent authentication request (Authentication Request) to gateway PDSN, comprise in the authentication request that service class promotes indication information;

Step 207, gateway PDSN send the request of inserting (Access Request) to authenticating and charging center AAA, insert to comprise in the request that authentication information (for example user name, password etc.) and service class promote indication information;

Step 208, authenticating and charging center AAA confirm according to the authentication information in the access request that receives whether this access terminal AT possesses the authority of service class change; Possess the authority of service class change if confirm this access terminal AT, then promote solicited message and promote the service class (Inter user priority) in the USI user service information (Subscriber Qos Profile) of preserving according to service class;

Step 209, authenticating and charging center AAA send to gateway PDSN and accept message (Access Accept), accept to comprise USI user service information in the message;

Step 210, gateway PDSN accomplish verification process, and the service class information after will upgrading according to USI user service information sends to access network equipment AN;

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

Step 212, the access network equipment AN service class information calculations after according to the renewal that receives goes out corresponding wireless dispatching parameter, and according to said wireless dispatching parameter said accessing terminal is carried out the priority scheduling operation.

In the present embodiment, step 201～204 have realized under CDMA2000 EVDO network, this process that accesses terminal and connect through access network equipment and Packet Control Function equipment and gateway.

In the access request message in present embodiment step 206 (Access Request) except authentication information; Comprise that also service class promotes indication information; A plurality of message fields be can comprise and insert request message, code (Code) message field, identifier (Identifier) message field, request authentication word (Request Authenticator) message field and attribute (Attributes) message field are respectively.This message format that inserts request message is following:

code

Identifier

Length

Request?Authenticator

Attributes

Wherein Length representes the length of this access request message.

Code message domain representation type of message, for example numerical value 1 this message of expression is for inserting request.Request authentication word message field comprises the authentication information that is used for authentication; The attribute message territory comprises that service class promotes indication information; Its length is variable, and comprises multiple attribute type, and each attribute type can also further comprise a plurality of message fields; For example type Type, length L ength and property value Value, form is following:

Type

Length

Value

Wherein for example the numerical value of Type is 6 o'clock, expression COS Service, and the Value message field can account for 4 bytes, comprising:

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

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

More than the format information of given message be merely conveniently understand the present invention program for example, and unrestricted, 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.

Improve the requirement of service class for customer requirements; Can also further charge in the authenticating and charging center; Guaranteeing the differentiation of high precedence service and common grade service charge, the service class information after the authenticating and charging center will be upgraded when gateway sends to access network equipment, the billing operation of the Freight Basis that the service class information of authenticating and charging center after to access terminal execution and renewal is corresponding; Accordingly; When discharging connection, the said former service class that accesses terminal is recovered at said authenticating and charging center, and finishes said billing operation.Provide an instance of the ticket writing that is used to charge in the following table, wherein increased new field value, expression " charging of the XX grade of service " in the PaidType payment type field.

More than the format information of given ticket writing also be merely conveniently understand the present invention program for example, and unrestricted.

Use the data, services of high priority of application as the user after, connect the recovery that can realize former service class and stop chargeing through discharging.As shown in Figure 4, for connecting the sketch map of release flow among the another embodiment of Packet data service priority scheduling method of the present invention.In the present embodiment, be example still with the CDMA2000EVDO network, connect release flow and comprise:

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

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

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

Step 304, Packet Control Function equipment PCF send register requirement to gateway PDSN, activate the operation that stops the station message recording;

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

Step 306, authenticating and charging center AAA recover USI user service information (Subscriber Qos Profile) the Central Plains service class information (Inter user priority) of access terminal AT according to the charging ending request that receives;

Step 307, authenticating and charging center AAA return the response (Account response) of chargeing to gateway PDSN;

Step 308, gateway PDSN receive when chargeing response, accomplish with access terminal AT between the release that is connected of PPP.

Send the requirement of lifting service class the user after; Access network equipment calculates corresponding wireless dispatching parameter according to the service class information after the renewal that receives; And then carry out priority scheduling according to the wireless dispatching parameter and operate; This process can be selected multiple existing priority scheduling method for use, but existing proportional fair dispatching method is not distinguished the QoS characteristic of different user service, therefore shortcoming to some extent is being provided aspect the data rate guarantee of doing one's best also.And the invention provides a kind of wireless resource scheduling scheme that can distinguish the Qos demand of the different user grade of service, and can for the user data rate of doing one's best guarantee be provided according to different service priority levels, this flow process is as shown in Figure 5, comprising:

Step 401, access network equipment AN ensure speed according to the corresponding nominal of service class information calculations that said service class promotes in the solicited message, and computing formula does

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

R wherein _GBR(i) nominal of expression user i ensures speed, R _DefThe expression default rate, Class (i) expression user i requested service rank, C is a constant, N representes online user's sum that access network equipment is served;

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

Current instantaneous peak transfer rate that step 403, access network equipment basis access terminal and acquired average transmission rate and said nominal guarantee speedometer are calculated the corresponding user class of service as the wireless dispatching parameter, and computing formula does

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

DRC wherein _i(t) be illustrated in the current instantaneous peak transfer rate of t constantly, R _i(t) be illustrated in the acquired average transmission rate of user i of t constantly, P _i(t) being illustrated in constantly, the user rate of t ensures function;

Average transmission rate R _i(t) pressing following formula upgrades:

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

T wherein _cBe time constant, the length of expression sliding time window, Current_Transmission_Rate_of_User_i representes i the transfer rate that the user is current;

P _i(t) computing formula does

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

Wherein λ is a constant.

If in the pairing Serving cell of access network equipment, exist a plurality of user's requested service ranks to satisfy the high and the most identical situation of priority, then said a plurality of users are formed high priority user set, and from this high priority user set according to DRC _i(t) numerical values recited is chosen the user and is dispatched.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

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 authenticating and charging center 1 responsible service class of sending that accesses terminal promotes indication information; And said accessing terminal carried out authentication; Authentication promotes indication information through the back according to said service class and carries out the service class renewal, and the service class information after will upgrading then sends to access network equipment through gateway.Access network equipment 2 is responsible for going out corresponding wireless dispatching parameter according to the service class information calculations after the said renewal that receives, and according to said wireless dispatching parameter said accessing terminal is carried out the priority scheduling operation.

The instantiation of Packet data service priority scheduling system can carry out the division of functional module with reference to aforementioned each method embodiment, has just no longer launched here.Each embodiment all adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that same or analogous part cross-references gets final product between each embodiment.For system embodiment, because it is similar basically with method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.

Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.

Claims (11)

1. Packet data service priority scheduling method comprises:

The service class lifting indication information that the authenticating and charging center accesses terminal and sends;

Authentication is carried out to said accessing terminal in said authenticating and charging center, and authentication promotes indication information through the back according to said service class and carries out the service class renewal;

Service class information after said authenticating and charging center will be upgraded sends to access network equipment through gateway;

Said access network equipment goes out corresponding wireless dispatching parameter according to the service class information calculations after the said renewal that receives, and according to said wireless dispatching parameter said accessing terminal is carried out the priority scheduling operation.

2. method according to claim 1, wherein, when discharging connection, the said former service class that accesses terminal is recovered at said authenticating and charging center.

3. method according to claim 1 wherein, accesses terminal before the service class sent promotes the operation of indication information at said authenticating and charging center, comprising:

Said accessing terminal connects through access network equipment and Packet Control Function equipment and gateway;

Said accessing terminal sent authentication request to said gateway, comprises in the said authentication request that service class promotes indication information;

Said gateway sends the request of access to said authenticating and charging center, comprises in the said access request that authentication information and service class promote indication information.

4. method according to claim 3, wherein, authentication is carried out to said accessing terminal in said authenticating and charging center, and the operation that authentication is carried out the service class renewal through the back according to said service class lifting solicited message is specially:

Said authenticating and charging center accesses terminal whether possess the authority of service class change according to the affirmation of the authentication information in the access request that receives is said; Possess the authority of service class change if confirm said accessing terminal, then promote solicited message and promote the service class in the USI user service information of preserving at said authenticating and charging center according to said service class.

5. method according to claim 4, wherein, the service class information after said authenticating and charging center will be upgraded is specially through the operation that gateway sends to access network equipment:

The said gateway of mind-set sends and accepts message in the said authenticating and charging, and said access accepts to comprise in the message said USI user service information;

Service class information after said gateway will upgrade according to said USI user service information sends to said access network equipment.

6. method according to claim 2, wherein, the service class information after said authenticating and charging center will be upgraded also comprises when gateway sends to access network equipment:

Said authenticating and charging center to said access terminal carry out with renewal after the billing operation of the corresponding Freight Basis of service class information;

When discharging connection, the said former service class that accesses terminal is recovered at said authenticating and charging center, and finishes said billing operation.

7. method according to claim 6, wherein said when discharge connecting, the said former service class that accesses terminal is recovered at said authenticating and charging center, and finishes said billing operation and be specially:

When discharging connection, said Packet Control Function equipment sends register requirement to gateway, activates the operation that stops the station message recording;

Said gateway sends the charging ending request to said authenticating and charging center;

The said former service class information that accesses terminal is recovered according to said charging ending request in said authenticating and charging center, and accomplishes the release that connects.

8. method according to claim 3; Wherein said access request comprises a plurality of message fields; Be respectively code message territory, identifier information territory, request authentication word message field and attribute message territory, said code message domain representation type of message, said identifier information domain representation COS; Described request authentication word message field comprises the authentication information that is used for authentication, and said attribute message territory comprises that service class promotes indication information.

9. method according to claim 3, wherein said access network equipment specifically comprises according to the operation that the service class information calculations after the said renewal that receives goes out corresponding wireless dispatching parameter:

Said access network equipment ensures speed according to the corresponding nominal of service class information calculations that said service class promotes in the solicited message, and computing formula does

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

R wherein _GBR(i) nominal of expression user i ensures speed, R _DefThe expression default rate, Class (i) expression user i requested service rank, C is a constant, N representes online user's sum that access network equipment is served;

Said access network equipment is confirmed said current instantaneous peak transfer rate that accesses terminal and the said acquired average transmission rate that accesses terminal according to channel capacity;

Said access network equipment ensures that according to the said current instantaneous peak transfer rate that accesses terminal and acquired average transmission rate and said nominal speedometer calculates the corresponding user class of service as the wireless dispatching parameter, and computing formula does

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

DRC wherein _i(t) be illustrated in the current instantaneous peak transfer rate of t constantly, R _i(t) be illustrated in the acquired average transmission rate of user i of t constantly, P _i(t) being illustrated in constantly, the user rate of t ensures function;

Average transmission rate R _i(t) pressing following formula upgrades:

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

T wherein _cBe time constant, the length of expression sliding time window, Current_Transmission_Rate_of_User_i representes i the transfer rate that the user is current;

P _i(t) computing formula does

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

Wherein λ is a constant.

10. method according to claim 9; If wherein in the pairing Serving cell of access network equipment, exist a plurality of user's requested service ranks to satisfy the high and the most identical situation of priority; Then said a plurality of users are formed high priority user set, and from this high priority user set according to DRC _i(t) numerical values recited is chosen the user and is dispatched.

11. a Packet data service priority scheduling system comprises:

The authenticating and charging center; Be used to receive the service class lifting indication information that accesses terminal and send; And said accessing terminal carried out authentication; Authentication promotes indication information through the back according to said service class and carries out the service class renewal, and the service class information after will upgrading then sends to access network equipment through gateway;

Access network equipment is used for going out corresponding wireless dispatching parameter according to the service class information calculations after the said renewal that receives, and according to said wireless dispatching parameter said accessing terminal is carried out the priority scheduling operation.

Images