WO2007085195A1

WO2007085195A1 - System and method for handling resource request

Info

Publication number: WO2007085195A1
Application number: PCT/CN2007/000285
Authority: WO
Inventors: Ying Wang; Youzhu Shi
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-01-26
Filing date: 2007-01-25
Publication date: 2007-08-02
Also published as: CN101009697B; CN101009697A

Abstract

A system and a method for handling resource request includes Application Function (AF) which sends resource request and Resource Request Handling Function (RRHF)which receives the resource request from the AF and handles it. If the QoS resource request can't be met by the system, the RRHF degrades the QoS need according to the QoS profile information and sends response to the AF. The RRHF may be PDF/SPDF or R-RACF.

Description

5 System and method for processing resource requests Technical field

The present invention relates to the field of communications technologies and, in particular, to systems and methods for processing resource requests. Background of the invention

At present, with the continuous maturity of packet technology, traditional telecommunication networks based on circuit switching are developing toward packet telecommunication-based broadband telecommunication networks. For traditional telecommunication networks, the call established by the user is carried on the circuit occupied by the user. As long as the circuit is assigned to the call established by the user, the quality of service (QoS) of the call can be guaranteed. However, in a broadband telecommunications network, a call established by a user is carried in a temporarily allocated packet channel, and the call is only allocated with sufficient packet channels (generally measured by the bandwidth as a quantity value), and the quality of service can be guaranteed. One of the characteristics of the broadband packet network is that the packet channel is shared by all users, and the maximum bandwidth that the user can obtain is that it needs to be contracted with the operator. Therefore, when the user initiates a call, it is not guaranteed to allocate enough bandwidth for establishing the call. , either because the bandwidth of the remaining packet channel of the network is insufficient, or because the remaining unused bandwidth in the maximum bandwidth available to the user is insufficient.

Therefore, in a broadband telecommunications network, a mechanism must be provided to ensure the quality of the user's QoS service. In order to implement QoS control, the architecture of dynamic QoS policy control is defined in the 3GPP standards organization, including three elements: gateway, Policy Decision Function (PDF) and Application Function (AF), where the gateway is Access between the IP connection service and the IP multimedia network; PDF conducts a policy decision point for service-based local policy control, which is responsible for responding to the resource reservation/allocation request of the upper-layer application, or may actively initiate the service due to changes in the network resource status. Reporting resources at the layer; AF initiates IP bearer resource requests to PDF according to the service requirements proposed by the core control layer server in the telecom carrier or service provider domain, in the 3GPP standard In an IMS (IP Multimedia Core Network Subsystem) system defined by the organization, the AF can be a P-CSCF (Proxy-Call Session Control Function), where between AF and PDF The interface is the Gq interface. A more detailed description can be found in the relevant standard documents defined by the 3GPP standards organization. For example, the definition of the Gq interface can be found in the 3GPP TS 29.209 standard document.

In the NGN (Next Generation Network) architecture defined by TISPAN (Telecommunications and Internet Converged Services and Protocols for Advanced Networking), PDF is also called SPDF (Service-based Policy Decision Function). The policy decision function), its basic functions are consistent with the 3GPP defined PDF. Due to the difference in service requirements and access bearers and mobile areas in the fixed-line field, the interface between AF and PDF/SPDF is called Gq, interface in the TISPAN specification to show inheritance and difference. At the same time, the Resource Admission Control Subsystem (RACS) architecture responsible for Qos resource reservation/allocation is given in TISPAN to complete the control, allocation and management functions of bearer network resources based on service requirements. The quality of service, as shown in Figure 1.

The resource admission control subsystem includes two logical network elements, SPDF and A-RACF. The A-RACF (Access-Resource and Admission Control Function) provides access control functions through the Rq interface. The QOS resource (such as bandwidth) request is received from the SPDF, and the access control is performed according to the related access network resources and the QoS subscription of the user, and the information of whether the resource is allowed to be accessed is returned to the SPDF through the Rq interface. The QoS profile of the user, such as the access subscription bandwidth, is stored in the NASS (Network Attachment Subsystem). The A-RACF can obtain the QoS subscription information of the user through the Ε4 interface.

For a more detailed description of the RACS and NASS subsystems and the Gq, interface, Rq interface and E4 interface, refer to the relevant standard documents defined by TISPAN. See also the relevant standards for the definition of QoS architecture in the ITU-T standard organization in NGN. Manuscript, in the definition of ITU-T, RACS is called RACF (Resource and Admission Control Function) System function), NASS is called NAAF (Network Access Attachment Function), such as Gq. The interface can be found in TISPAN's ETSI TS 183 017 standard document. The Rq interface can be found in TISPAN's ETSI ES 283 026 standard document. . For ease of description, the present invention will only be written in the TISPAN standard nomenclature.

Based on the above background description, when the user initiates a session, the QoS resource required for the session is requested by the AF to the PDF/SPDF, the PDF/SPDF or the A-RACF processes the request, and requests the bearer transport layer to allocate the Qos resource (such as bandwidth), if currently If the network resources available to the user cannot meet the maximum resources required by the user, the PDF/SPDF through the Gq/Gq interface fails to request the AF feedback resource, and the AF will tear down the session. However, if we consider such a requirement, if the network resources available to the user cannot meet the maximum resources required by the session, if the user allows the degradation, and the network resources currently available to the user can satisfy the quality of the degradation allowed, then The session is degraded to ensure that the session is established. Obviously, the above prior art cannot meet the requirements of the degraded service, and the session will be directly released when the maximum bandwidth of the session request cannot be satisfied. Therefore, it is necessary to improve the existing technology to meet the needs of practical applications. Summary of the invention

The present invention provides a system and method for processing a resource request, and a policy decision function PDF/SPDF entity and an access-resource admission control function A-RACF entity.

A method of processing a resource request, including the following steps:

The resource request processing entity receives the resource request from the application function entity AF, and if the quality of service Qos resource requirement in the resource request is not satisfied, the quality reduction processing is performed according to the degraded information signed by the user.

A system for processing resource requests, including:

Applying a functional entity AF, which is used to send a resource request;

a resource request processing entity, which receives the resource request, and when the quality of service Qos resource requirement in the resource request is not satisfied, performs degradation processing according to the degraded information signed by the user, and performs the AF returns a resource request response.

A policy decision function PDF/SPDF entity, which includes a PDF/SPDF sending unit, a PDF/SPDF receiving unit, and a PDF/SPDF resource decision unit;

The PDF/SPDF receiving unit is connected to the PDF/SPDF resource decision unit and receives resource request and degradation information; the PDF/SPDF sending unit is connected to the PDF/SPDF resource decision unit for transmitting resource requests and resources. Request response

The PDF/SPDF resource decision unit processes the resource request received by the receiving unit, and if the quality of service Qos resource requirement in the resource request is not satisfied, performing degradation processing according to the degradation information, and further It is judged whether the quality of service Qos resource demand allowed by the user degradation can be satisfied, and if the judgment can be satisfied, the resource request response is sent by the PDF/SPDF transmitting unit.

An access-resource admission control function entity A-RACF, an A-RACF transmission unit, an A-RACF receiving unit, and an A-RACF resource decision unit;

The A-ACF receiving unit is connected to the A-RACF resource decision unit, and receives resource request and degradation information; the A-RACF sending unit is connected to the A-RACF resource decision unit, and is used for sending Resource information after degraded;

The A-RACF resource decision unit processes the resource request, and if the quality of service Qos resource requirement in the resource request is not met, performing degradation processing according to the degradation information, and further determining the user drop Whether the quality of service quality Qos resource requirement can be satisfied, if the judgment can be satisfied, the A-RACF sending unit sends the degraded resource information.

It can be seen from the foregoing technical solution that the present invention allows the user to degrade the network resources available to the current user when the network resources available to the user cannot meet the requested QoS resource requirements, and performs processing according to the degraded information signed by the user, if the current user can obtain the network. The resource can meet the Qos resource requirement allowed by the user to degrade. The PDF/SPDF returns a request to the AF to successfully respond, ensuring the session establishment connection, and improving the success rate and efficiency of the service layer resource request. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the RACS functional architecture of TISPAN.

2 is a flow chart of a specific application according to Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram showing the internal structure of an A-RACF entity according to Embodiment 1 of the present invention.

4 is a flow chart of a specific application according to Embodiment 2 of the present invention.

FIG. 5 is a schematic diagram showing the internal structure of a PDF/SPDF entity according to Embodiment 2 of the present invention. 6 is a flow chart of a specific application according to Embodiment 3 of the present invention.

7 is a flow chart of a specific application according to Embodiment 4 of the present invention.

FIG. 8 is a flow chart of a specific application according to Embodiment 5 of the present invention.

9 is a flow chart of a specific application according to Embodiment 6 of the present invention.

Figure 10 is a flow chart showing a specific application of Embodiment 7 of the present invention.

11 is a flow chart of a specific application of an eighth embodiment of the present invention. Mode for carrying out the invention

The technical solutions described in the present invention are described in detail below with reference to the accompanying drawings and specific embodiments. The system for processing resource requests according to the present invention includes an AF entity, a PDF/SPDF entity, an A-RACF entity, and a NASS entity, wherein an interface between the AF and the PDF/SPDF is provided with Gq/Gq', PDF/SPDF and A-RACF. There is an interface Rq, and an interface E4 is provided between the NASS and the A-RACF. The entities exchange data directly or indirectly through interfaces. These interfaces are all based on the Diameter protocol.

As a kind of subscription data, the user's degraded information can be stored in the service application layer of the network (such as HSS, application server and other user service subscription database), or stored in NASS, or directly stored in PDF/SPDF or A. -RACF. RACS handles user degradation requirements. The specific network element can be PDF/SPDF or A-RACF.

When the user initiates a session and applies for the QoS resource required by the session to the PDF/SPDF through the AF, the RACS processes the request and requests the bearer transport layer to allocate the Qos resource, which is available to the current user. The network resources cannot meet the requested QoS resource requirements. If the user allows degradation, the user will process the degradation information according to the user's subscription. If the current network resources available to the user can meet the Qos resource requirements allowed by the user, the PDF/SPDF A successful response is returned to A, ensuring that the session is established.

In the present invention, the QoS resource takes the bandwidth as an example, and the degraded information is the bandwidth information that the media allows degradation. The degraded information representation carried by each interface protocol extension may be the bandwidth value allowed to be degraded by a certain media type. , can also be expressed in other forms such as the percentage of the media type allowed to be degraded. The QoS resource may also be a packet loss rate, and the degraded information is a packet loss rate information that is allowed to be degraded by the media. The packet loss rate information carried by each interface protocol may be degraded to a certain media type. The packet loss rate value or other form. In the embodiment of the present invention, the bandwidth is taken as an example, and the case of the packet loss rate is similar to the case of the broadband.

To implement the solution of the present invention, the following protocol interfaces need to have the following extensions:

(1) The degradation information is transmitted to the AF through a Session Initiation Protocol (SIP) message. The Session Description Protocol (SDP) attribute description carried in the SIP message is extended to extend the bandwidth information line in the SDP:

b= X-Fallback: 8000

Indicates that the bandwidth required for degradation can be 8000Kbits/s, where X-Fallback means the extended attribute field name, and can also be extended in the attribute line of SDP:

a= X-Fallback: 8000

(2) The degradation information is transmitted by the AF to the PDF/SPDF through the Gq/Gq interface. A new attribute-value pair (AVP) parameter is added: Fallback-Information AVP, each media type for the session request. There is such a parameter, this parameter is derived from the user's subscription information (not necessarily the original information signed by the user, may be the calculated information), indicating the minimum requirement for the media type to be degraded. parameter.

This parameter can be carried by the authentication authorization request command AA-Request (AAR) command. (3) Degradation information is transmitted from PDF/SPDF to A-RACF via Rq interface, adding a new one AVP: Same as (2).

(4) Degraded information is transmitted by NASS to A-RACF through E4 interface, and a new parameter is added to the QOS Profile Information transmitted from NASS to A-RACF on E4 interface: Fallback-Information, for each A media type can sign such a degradation information, the content of which can be the minimum bandwidth allowed by this media type to be degraded.

(5) The degradation information is transmitted to the PDF/SPDF through the Rq interface by the A-RACF. The new AVP: Fallback-Information AVP can be obtained by the authentication 4 Manpower response command AA- Answer (AAA) command or the re-authorization request command Re. -Auth-Request (RAR) command carries, each of the media types for the session request has such a parameter, this parameter is based on the user's subscription information (not necessarily the original information signed by the user, may be calculated The information), ' indicates the minimum required bandwidth for this media type, allowing degradation.

(6) The degradation information is transmitted to the AF by the HSS through the Diameter protocol, and the new AVP is also the same (2). It should be noted that, more specifically, the foregoing six extended degradation information can further distinguish the uplink bandwidth degradation information and the downlink bandwidth degradation information, for example, the Fallback-Information AVP can be defined as a pair of AVP parameters Fallback-Information-UL AVP/ Fallback-Information-DL AVP, which indicates the bandwidth degradation information of the uplink and downlink respectively. However, since the uplink bandwidth and the downlink bandwidth of the media bandwidth are generally the same, the bandwidth degradation can be performed without distinguishing between uplink and downlink. The expansion of information.

In the following, the degradation information subscribed by the user is separately stored in the service application layer (user service subscription database), NASS and PDF/SPDF or A-RACF of the network, and the present invention is further described in accordance with various embodiments.

a. The user's contracted degradation information is stored in the service application layer of the network.

When the user's degradation information is stored in the service application layer of the network, the AF needs to carry the user's contention information in the QoS resource request to the PDF/SPDF, that is, the Gq/Gq, the interface carries the user's degradation. Information, and the AF needs to obtain the degradation information, and the other network element including the user service subscription database in the service application layer of the network needs to pass the call control signaling or The Diameter is delivered to the AF. Currently, the 3GPP/TISPAN/ITU-T uses SIP for the call control signaling. Therefore, the degradation information needs to be carried in the SIP message or the Diameter protocol.

If the network element that handles the user's degradation request is PDF/SPDF, the AF parses the user's contracted degradation information from the SIP message or Diameter message it receives and passes it to the PDF/SPDF through the Gq/Gq interface. After obtaining the degradation information, the PDF/SPDF comprehensively determines the user request according to the network resource usage status, the operator-based local policy rule, and/or the user-based subscription rule (such as QoS subscription information) and the current network bandwidth used by the user. Whether the maximum bandwidth requirement can be met, if not satisfied, but at the same time the user currently available bandwidth meets the bandwidth requirement of the user after degradation, the user is allowed to obtain the bandwidth, and the resource request is successfully returned to the AF, where PDF/SPDF can The bandwidth information obtained by the degraded user is returned to the AF through the extended Gq/Gq' interface, or may not be returned.

If the network element that handles the user's degradation request is A-RACF, the AF parses the user's contracted degradation information from the SIP or Diameter message it receives and passes it to the PDF/SPDF through the Gq/Gq' interface, and then PDF/ SPDF is passed to A-RACF via the Rq interface. After the A-RACF obtains the degradation information, the service quality subscription information such as the maximum bandwidth of the user access subscription and the current network bandwidth used by the user determine that the bandwidth information currently available to the user on the access side cannot meet the maximum bandwidth requirement requested by the user. However, if the user's contracted degraded demand is met, the bandwidth information currently available to the degraded user on the access side is returned to the PDF/SPDF. The PDF/SPDF allows the user to obtain bandwidth according to the network resource usage status and the operator-based local policy rules, and returns the resource request success response to the AF. The PDF/SPDF can be lowered through the extended Gq/Gq' interface. The bandwidth information available to the user after the quality is returned to the AF, and may not be returned.

b. User-signed degradation information is stored in NASS

If the network element that handles the user's degradation requirements is PDF/SPDF, the degradation information is passed from the NASS to the A-RACF through the E4 interface, and the A-RACF is passed to the PDF/SPDF. As above, after the PDF/SPDF obtains the degradation information, according to the network resource usage status, the operator-based local policy rules, and/or the user-based subscription rules (such as QoS subscription information), and the current network bandwidth used by the user, Comprehensively determine whether the maximum bandwidth demand requested by the user can be met. If it is not satisfied, but at the same time the bandwidth currently available to the user meets the bandwidth requirement of the user after degradation, the user is allowed to obtain the bandwidth and return a resource request to the AF to successfully respond, wherein the PDF/SPDF can be extended through the Gq/Gq interface. The bandwidth information available to the degraded user is returned to the AF, or it may not be returned.

If the network element that handles the user's degradation requirements is A-RACF, the degradation information is passed from the NASS to the A-RACF through the E4 interface. As above, the A-RACF can obtain the maximum bandwidth requirement that the user can obtain on the access side according to the service quality subscription information such as the maximum bandwidth of the user access subscription and the user currently using the network bandwidth, but meets the maximum bandwidth requirement requested by the user, but meets the user subscription. The degraded demand returns the bandwidth information currently available to the user on the access side after the degradation in PDF/SPDF. PDF/SPDF allows the user to obtain bandwidth according to the network resource usage status and the operator's local policy rules, and returns the resource request to AF. The PDF/SPDF can be extended by the extended Gq/Gq interface. The bandwidth information available to the user after the quality is returned to the AF, and may not be returned.

c User-contracted degradation information is stored in PDF/SPDF or A-RACF.

At this time, the aforementioned degradation information of the user subscription through the interface protocol extension is no longer needed, and the PDF/SPDF is based on the network resource usage status, the operator-based local policy rule, and/or the user-based subscription rule (such as QoS signing). The information) and the user currently use the network bandwidth, etc., to comprehensively determine whether the maximum bandwidth demand requested by the user can be satisfied. If it is not satisfied, but the bandwidth currently available to the user meets the bandwidth requirement of the user after degradation, the authorized user can obtain the bandwidth; or the service quality subscription information such as the maximum bandwidth of the user access subscription by the A-RACF and the user currently used. The network bandwidth indicates that the bandwidth information currently available to the user on the access side cannot meet the maximum bandwidth requirement requested by the user, but meets the degraded demand of the user, and the user is currently available on the access side after returning the degradation to the PDF/SPDF. Bandwidth information. PDF/SPDF then allows the user to obtain bandwidth according to the network resource usage status, based on the operator's local policy rules, etc., and returns the resource request to AF. The PDF/SPDF can be extended by the extended Gq/Gq interface. The bandwidth information available to the user after the return is returned to the AF, and may not be returned.

Embodiment 1: In this embodiment, the user initiates a video session and requests a maximum bandwidth of 10M, but the bandwidth that the current user can obtain on the access side is only 8Μ; the specific content of the user's subscription degradation information in the NASS includes: 8Μ, or the user is allowed to downgrade the video media to 80% of the required maximum bandwidth; the determination and processing of degradation is performed at A-RACF.

The QoS resource required by the AF to apply for a session to the PDF/SPDF, PDF/SPDF and A-RACF process the request, and request the bearer transfer layer to allocate the Qos resource, and the present invention solves the following situation, that is, the current user can obtain The network resource cannot meet the requested QoS resource requirement, and the user is allowed to degrade, and the user is processed according to the degraded information signed by the user. If the network resources available to the current user can meet the Qos resource requirements allowed by the user's degradation, the PDF/SPDF returns a request to the AF to successfully respond, ensuring that the session is established.

Figure 2 shows the specific steps of this embodiment:

Step 201. The NASS sends the subscription data to the A-RACF through the extended E4 interface, including the user accessing the maximum bandwidth of the subscription, and the degradation information;

Step 202. The AF requests the maximum bandwidth 10M resource required by the session from the PDF. Step 203. The PDF requests the A-RACF resource with a maximum bandwidth of 10M, and the PDF also requests the resource information from the bearer transport layer, in this example. Assume that the part of the network resources carrying the transport layer can meet the user resource requirements, so this part of the interaction is omitted in Figure 2, which is described first;

Step 204. The A-RACF determines that the currently available resources of the user are only 8M according to the service quality subscription information such as the maximum bandwidth of the user access subscription, and the user currently uses the network bandwidth. According to the degraded information signed by the user, the 8M can satisfy the degraded bandwidth. Claim;

Step 205. The A-RACF returns the information of the current available resource to the 8M bandwidth to the PDF, and transmits it through the AVP extended on the Rq interface, as described later;

Step 206. The PDF finally determines that the user can obtain a bandwidth of 8M according to the information collected from the A-RACF and the bearer transport layer;

Step 207. The PDF returns the bandwidth information obtained by the end user to the AF through the AVP extended by the Gq/Gq' interface, and the resource request is successfully degraded to 8M, and the session is established and connected. The user can obtain bandwidth information after the degradation is returned to the AF through the Gq/Gq' interface, which is not necessary for the present invention, and the PDF can also return a resource request to the AF to successfully respond.

The Rq interface extension involved in this embodiment is specifically as follows:

Added AVP: Available- Access-Bandwidth AVP. The RQ interface extension can be carried in the Re-Auth-Request (RAR) command and the AA-Agree (AAA) command, indicating the bandwidth that the current user can obtain on the access side. This information can be based on the user access subscription bandwidth. And the user has currently used the network bandwidth, the parameter unit is bits/s (bits per second), the value is an unsigned 32-bit integer, and the AVP code (AVP code) is an integer value, such as 533, the new AVP recommendation Carrying the 'Ύ' bit indicates that the AVP is vendor-specific; it is recommended not to carry the "M" bit, which means that the recipient of the message can be optionally identified; it can carry the "P" bit, indicating that end-to-end secure encryption can be performed.

The Gq/Gq' interface extension involved in this embodiment is specifically as follows:

Added AVP: Available-Bandwidth AVP. In Gq/Gq, the interface extension can be carried in the Re-Auth-Request (RAR) command and the AA- Answer (AAA) command, indicating the bandwidth available to the current user. The bandwidth available to the user can be PDF/SPDF. According to a) the bandwidth that the current network can provide; b) the user access side received from the A-RACF through the Rq interface can obtain a bandwidth information that is comprehensively determined by the bandwidth. The unit of this parameter is bits/s (bits per second), the value is an unsigned 32-bit integer, and the AVP code (AVP code) is an integer value, such as 532. The new AVP is recommended to carry a "V" bit, indicating that the AVP is a vendor. Dedicated; It is recommended not to carry the "M" bit, which means that the recipient of the message can be optionally identified; it can carry the "P" bit, indicating that end-to-end secure encryption can be performed.

Similarly, as mentioned before the interface, both the Available-Access-Bandwidth AVP and the Available-Bandwidth AVP can further distinguish between upstream and downstream bandwidth: Available- Access-Bandwidth-UL AVP/Available-Access-Bandwidth-DL AVP, Available-Bandwidth- UL AVP/Available-Bandwidth-DL AVP.

The E4 interface extension involved in this embodiment is specifically as follows:

Quality of Service signing information (Qos Profile) delivered from the NASS to the A-RACF on the E4 interface Information)) Add a new parameter: Fallback-Information, for each media type, you can sign such a degraded information, the content can be the minimum bandwidth allowed by this media type, or it can be tolerated by this media type. The maximum packet loss rate.

In this embodiment, the A-RACF entity includes an A-RACF sending unit 301, an A-RACF receiving unit 302, and an A-RACF resource decision unit 303, as shown in FIG.

The A-RACF receiving unit 302 is connected to the A-RACF resource decision unit 303, and receives the request message sent by the PDF/SPDF and the user-subscribed degradation information sent by the NASS; A-RACF sending unit 301 and A-RACF resources The decision unit 303 is connected and used to return the bandwidth information currently available on the access side after the shield is returned to the PDF/SPDF;

The A-RACF resource decision unit 303 processes the request sent by the PDF/SPDF, and if the quality of service Qos resource requirement in the request is not satisfied, the degradation processing is performed according to the degraded information signed by the user, and further It is judged whether the quality of service Qos resource requirement allowed by the user degradation can be satisfied. If the judgment can be satisfied, the A-RACF sending unit 301 returns the bandwidth information currently available on the access side after degrading to the PDF/SPDF.

Embodiment 2:

This embodiment is basically the same as the first embodiment. The user initiates a video session and requests a maximum bandwidth of 10M. However, the bandwidth available to the current user on the access side is only 8M. The user signs the degradation information on the NASS. The specific content includes: Degraded to 8M, or the user allowed to degrade the video media to 80% of the required maximum bandwidth; the difference from the first embodiment is: Degradation judgment and processing is performed in PDF/SPDF.

Figure 4 shows the specific steps of this embodiment:

Step 401. The NASS sends the subscription data to the A-RACF through the extended E4 interface, including the user accessing the maximum bandwidth of the subscription, and the information about the reduction of the shield;

Step 402. The AF requests the maximum bandwidth required for the session from the PDF by 10M resources;

Step 403. The PDF requests the A-RACF for the resource with the maximum bandwidth of 10M, and the PDF also requests the resource information from the bearer transport layer. Step 404. The A-RACF returns the user subscription data and the available bandwidth of the current access part to the PDF;

Step 405. The PDF determines that the user currently has only 8M resources based on the available bandwidth of the access part. According to the degraded information signed by the user, the 8M can meet the bandwidth requirement after degraded, and finally determines that the user can obtain the bandwidth of 8M;

Step 406. The resource request is successful, and the quality is degraded to 8M bandwidth.

After the degradation to 8M, the session is established. The interface extension involved in this embodiment is the same as the interface extension described in the first embodiment.

In this embodiment, the PDF/SPDF entity includes a PDF/SPDF sending unit 501, a PDF/SPDF receiving unit 502, and a PDF/SPDF resource decision unit 503, as shown in FIG.

The PDF/SPDF receiving unit 502 is connected to the PDF/SPDF resource decision unit 503, and receives the request message transmitted by the AF and the available bandwidth message and the degradation message transmitted from the access-resource admission control function entity A - RACF. The PDF/SPDF sending unit 501 is connected to the PDF/SPDF resource decision unit 503, and configured to send a resource request message to the A-RACF, and return a resource request response message to the AF;

The PDF/SPDF resource decision unit 503 processes the request sent by the AF, and if the quality of service Qos resource requirement in the request is not satisfied, according to the degradation information signed by the user and the obtained from the A-RACF The bandwidth information is obtained for degradation processing, and it is further determined whether the service shield Qos resource requirement allowed by the user degradation can be satisfied. If the determination is satisfied, the PDF/SPDF transmitting unit 501 returns a request for a successful response to the AF.

Embodiment 3:

In this embodiment, the user initiates a video session, requesting a maximum bandwidth of 10M, but the bandwidth available to the current user on the access side is only 8M; the determination and processing of the degradation is performed in the PDF/SPDF; the user's contracted degraded information is saved. In the service application layer of the network, other network elements including the user service subscription database in the service application layer of the network transmit the degraded information of the user subscription to the AF through the session initiation protocol SIP or the Diameter protocol, and the user service subscription database Saved user Signed downgrade information. ·

Figure 6 shows the specific steps of this embodiment:

Step 601. The user service contracting database sends the user's contracted downsizing information to the AF, and the information carries the degraded information through the extended SIP or Diameter;

Step 602. The AF sends a Qos resource request to the PDF, where the request includes a maximum request bandwidth of 10M, and the user's contracted degradation information;

Step 603. The PDF determines that the user currently has only 8M of resources. According to the down-conversion information signed by the user, 8M can meet the bandwidth requirement after the shield is reduced;

Step 604. The resource request is successful, and the quality is degraded to 8M bandwidth.

After degrading to 8M bandwidth, the session is established. The embodiment is related to the interface extension described in the first embodiment, and is also designed to extend the session initiation protocol SIP: the SDP attribute description of the session description protocol carried in the extended SIP message, and the bandwidth information line in the SDP is extended, b= X-Fallback: 8000 indicates that the bandwidth required for degradation can be 8000Kbits/s, where X-Fallback indicates the extended attribute field name, and can also be extended in the SDP attribute line: a= X-Fallback: 8000. The expansion of the Diameter involved in this embodiment is: new force. An attribute-value pair (AVP) parameter: Fallback-Information AVP, which has such a parameter for each media type of the session request. This parameter is based on the user's subscription information (not necessarily the user). The original information of the contract, which may be the calculated information, indicates the minimum required parameters for the media type to be degraded. This parameter can be carried by the authentication authorization request command AA-Request (AAR) command.

In this embodiment, the PDF/SPDF entity is substantially the same as the PDF/SPDF entity shown in FIG. 5, except that the PDF/SPDF receiving unit receives the request message sent by the AF, and the information has a drop in the information. Quality message, the PDF/SPDF and A-RACF did not communicate on the information.

Embodiment 4:

In this embodiment, the conditions are substantially the same as those of the third embodiment. Different from the third embodiment, the degradation is The judgment and processing is performed in A-RACF, and the PDF will send the resource request information with the degradation information to A-RACF.

Figure 7 shows the specific steps of this embodiment:

Step 701. The user service contracting database sends the user's contracted degraded information to the AF, and the information carries the degraded information through the extended SIP or Diameter;

Step 702. The AF sends a Qos resource request to the PDF, where the request includes a maximum request bandwidth of 10M, and the user's contracted degradation information;

Step 703. The PDF sends the maximum request bandwidth of 10M, and the degraded information signed by the user to the A-RACF;

Step 704. The A-RACF determines that the available resources of the user on the access side are only 8M. According to the degradation information signed by the user, the 8M can meet the bandwidth requirement after the degradation.

Step 705. A- RACF sends the information of the 8M bandwidth to the user after the degradation is sent to the PDF; Step 706. The PDF determines that the user is allowed to obtain the 8M bandwidth;

Step 707. The PDF returns the resource request to the AF successfully, and the P quality reaches the 8M bandwidth.

After degrading to 8M bandwidth, the session is established. This embodiment relates to the interface extension as described in the third embodiment.

In this embodiment, the A-RACF entity is substantially the same as the A-RACF entity shown in FIG. 3, except that the A-RACF receiving unit receives the request message sent by the PDF/SPDF with a drop. Quality information, the A-RACF entity has no information communication with the NASS.

Embodiment 5:

In this embodiment, the user initiates a video session, requesting a maximum bandwidth of 10M, but the bandwidth available to the current user on the access side is only 8M; the degraded information signed by the user is saved in the PDF/SPDF, and the determination and processing of the degradation is also performed. Conducted in PDF/SPDF.

At this time, the aforementioned degradation information of the user subscription through the interface protocol extension is no longer needed, and the PDF/SPDF is based on the network resource usage status, the operator-based local policy rule, and/or the user-based subscription rule (such as QoS signing). Information) and the user's current use of network bandwidth, etc. Whether the maximum bandwidth requirement requested by the user can be satisfied. If the bandwidth is not met, but the bandwidth currently available to the user meets the bandwidth requirement of the user after degradation, the authorized user can obtain the bandwidth.

Figure 8 shows the specific steps of this embodiment:

Step 801. The maximum bandwidth required by the AF to request the session from the PDF is 10M resources. Step 802. The PDF determines that the user currently has only 8M of resources. According to the degraded information signed by the user, 8M can meet the bandwidth requirement after degraded.

Step 803. The PDF returns the resource request to the AF successfully, and the quality is 8M bandwidth.

After degrading to 8M bandwidth, establish a session connection. In the embodiment, the aforementioned degradation information of the user subscription is not required to be extended by the interface protocol extension.

In this embodiment, the PDF is basically the same as the PDF/SPDF in FIG. 5, except that a memory is added for storing the degraded information signed by the user, and the PDF/SPDF is not received from A. - information of the RACF, the message sent by the AF does not carry the degradation message, and the PDF/SPDF resource decision unit acquires the degradation message from the memory to perform degradation processing.

Example 6:

In this embodiment, the user initiates a video session, requesting a maximum bandwidth of 10M, but the bandwidth available to the current user on the access side is only 8M; the degraded information of the user subscription is stored in the A-RACF, and the determination and processing of the degradation is also performed. In A-RACF.

Figure 9 shows the specific steps of this embodiment:

Step 901. The AF requests the maximum bandwidth 10M resource required by the session from the PDF. Step 902. The PDF sends the requested maximum bandwidth 10M information to the A-RACF. Step 903. The A-RACF determines that the user currently has resources available. 8M, according to the degradation information signed by the user, 8M can meet the bandwidth requirement after degraded;

Step 904. After the A-RACF sends the degradation to the PDF, the user can obtain the information of the 8M bandwidth, and the information is transmitted through the AVP extended on the Rq interface;

Step 905. The PDF determines that the user is allowed to obtain the 8M bandwidth; Step 906. The PDF returns the resource request to the AF successfully, and degrades to 8M bandwidth.

After degrading to 8M bandwidth, establish a session connection. The aforementioned degradation information for user subscription is passed through the interface protocol extension.

In this embodiment, the A-RACF is basically the same as the A-RACF in FIG. 3, except that a memory is added for storing the degraded information signed by the user, and the PDF/SPDF is sent. The message does not carry the degradation information of the user subscription, and the A-RACF resource decision unit acquires the degradation message from the memory to perform degradation processing.

Example 7:

In this embodiment, the user initiates a video session, requesting a maximum bandwidth of 10M, but the bandwidth available to the current user on the access side is only 8M; the degradation information signed by the user is stored in the A-RACF, and the degradation is determined and processed in the PDF. /SPDF.

Figure 10 shows the specific steps of this embodiment:

Step 1001. The AF requests the maximum bandwidth 10M resource required for the session from the PDF; Step 1002. The PDF requests the A-RACF to request the maximum bandwidth 10M resource of the session; Step 1003. A- RACF sends the current access side of the user to the PDF. Only 8M of available resources, as well as degraded information stored in it;

Step 1004. The PDF determines that the service quality subscription information such as the maximum bandwidth of the user access subscription, and the bandwidth information currently obtained by the user on the access side and the degradation information stored in the A-RACF obtained from the A-RACF, cannot be satisfied. The maximum bandwidth requirement requested by the user, but satisfying the degraded demand of the user, allowing the user to obtain 8M bandwidth;

Step 1005. The PDF returns the resource request to the AF successfully, and the P quality reaches the 8M bandwidth.

After degrading to 8M bandwidth, establish a session connection.

In this embodiment, the PDF/SPDF entity is substantially the same as the PDF/SPDF entity shown in FIG.

Example 8:

In this embodiment, the user initiates a video session, requesting a maximum bandwidth of 10M, but the current user is receiving The bandwidth available on the inbound side is only 8M; the degraded information signed by the user is saved in PDF/SPDF, and the judgment and processing of degradation is performed in A-RACF.

Figure 11 shows the specific steps of this embodiment:

Step 1101. The AF requests the PDF for the maximum bandwidth required by the session to 10M resources; Step 1102. The PDF sends the maximum bandwidth requirement information and the user-subscribed degradation information to the A-RACF;

Step 1103. The A-RACF determines that the bandwidth that the user currently has available on the access side is 8M, and the degradation information, determines that the maximum bandwidth requirement requested by the user cannot be met, but meets the user's contracted degradation. Demand, send PDF/SPDF 8M bandwidth information available to users after degradation;

Step 1104. After comprehensive judgment based on the network resource usage status and the operator's local policy rules, the PDF/SPDF allows the user to obtain the degraded bandwidth, and returns a resource request success response to the AF, and degrades to 8M bandwidth.

After the degradation to 8M bandwidth, establish a session connection.

In this embodiment, the A-RACF entity is substantially the same as the A-RACF entity shown in FIG. 3, except that the A-RACF receiving unit receives degradation information from the PDF, but does not have NASS. Communication on information.

In summary, in the present invention, when the network resource available to the user cannot satisfy the maximum resource requested by the user, the user-initiated session request is degraded according to the network resource condition to ensure that the session is established and connected.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

A method for processing a resource request, comprising: the resource request processing entity receiving a resource request from an application function entity AF, and if the quality of service Qos resource requirement in the resource request is not met, Degradation processing is performed according to the degradation information signed by the user.

The method according to claim 1, wherein, if the quality of service Qos resource requirement in the resource request is not satisfied, the degradation processing is performed according to the degraded information signed by the user as: the resource request processing entity Determining whether the maximum QoS resource requested by the user in the resource request can be satisfied, if not, but the network resource currently available to the user according to the degraded information meets the QoS resource requirement of the user after degrading, the authorized user can obtain Degraded QoS resources.

The method according to claim 1, wherein the degradation information is stored in the resource request processing entity, or is stored in a network attachment subsystem NASS or stored in a user service subscription database.

The method according to claim 1, wherein: the QoS resource is a bandwidth or a packet loss rate, and the degradation information is bandwidth information or packet loss rate information that the media allows degradation.

5. A system for processing a resource request, comprising:

Applying a functional entity AF, which is used to send a resource request;

The resource request processing entity receives the resource request, and when the quality of service Qos resource requirement in the resource request is not satisfied, performs degradation processing according to the degraded information signed by the user, and returns a resource request response to the AF.

The system according to claim 5, wherein the resource request processing entity is: a simplistic decision function PDF/SPDF, wherein the degradation information is saved, and the resource request sent by the AF is received. And determining and processing the degradation according to the degradation information, and returning a resource request response to the AF.

The system according to claim 5, wherein said resource request processing entity The policy decision function PDF/SPDF and the access-resource admission control function A-RACF, wherein the PDF/SPDF stores the degradation information, receives the resource request sent by the AF, and sends the resource request to the A - the RACF sends a request with degradation information, the A-RACF performs degradation determination and processing according to the degradation message, and returns a degraded message to the PDF/SPDF, the PDF/SPDF The AF returns a resource request response.

The system according to claim 5, wherein the resource request processing entity is: a policy decision function PDF/SPDF and an access-resource admission control function A-RACF, wherein the A-RACF saves Having the degradation information, the PDF/SPDF receives the resource request sent by the AF, and the A-RACF sends a resource message with degradation information, performs degradation determination and processing, and AF returns a resource request response.

The system according to claim 5, wherein the resource request processing entity is: a policy decision function PDF/SPDF and an access-resource admission control function A-RACF, wherein the A-RACF saves And having the degradation information, the PDF/SPDF receiving the resource request sent by the AF, and sending the resource request to the A-RACF, where the A-RACF is degraded according to the degradation message And determining, and returning the degraded message to the PDF/SPDF, the PDF/SPDF returning a resource request response to the AF.

The system according to claim 5, wherein the resource request processing entity is: a policy decision function PDF/SPDF, an access-resource admission control function A-RACF, and the system further includes a network. Attaching a subsystem NASS, wherein the NASS stores the degradation information, and the degradation information is sent to the A-RACF through an extended E4 interface, and the PDF/SPDF receives the AF transmission Resource request and degraded information sent by the A-RACF, and performing degradation determination and processing, the PDF/SPDF returns a resource request response to the AF, wherein the A-RACF and the PDF /SPDF performs data interaction through the extended Rq interface.

The system according to claim 5, wherein the resource request processing entity is: a policy decision function PDF/SPDF, an access-resource admission control function A-RACF, and The system further includes a network attachment subsystem NASS, wherein the NASS stores the degradation information, and transmits the degradation information to the A-RACF through an extended E4 interface, the PDF/SPDF Receiving a resource request sent by the AF, and sending the resource request to the A-RACF, where the A-RACF performs degradation determination and processing according to the degradation message, and returns the degraded to the PDF/SPDF. Information, the PDF/SPDF returns a resource request response to the AF, wherein the A-RACF and the PDF/SPDF perform data interaction through an Rq interface.

The system according to claim 5, wherein the resource request processing entity is: a policy decision function PDF/SPDF, and the system further comprises a user service subscription database of a network service application layer, where The user service subscription database stores the degradation information, and sends the degradation information to the AF, and the PDF/SPDF receives the resource request with the degradation information sent by the AF, and performs the reduction. Quality judgment and processing, and returning a resource request response to the AF.

The system according to claim 5, wherein the resource request processing entity is: a policy decision function PDF/SPDF and an access-resource admission control function A-RACF, and the system further includes a network a user service subscription database of the service application layer, wherein the user service subscription database stores the degradation information, and the degradation information is sent to the AF, and the PDF/SPDF receives the AF transmission. a resource request with degraded information, and the resource request is sent to the A-RACF, the A-RACF performs degradation determination and processing, and returns the degraded information to the PDF/SPDF. The PDF/SPDF returns a resource request response to the AF.

The system according to claim 12 or 13, wherein the user service subscription database of the network service application layer is a home subscriber server HSS or an application server.

The system according to claim 12 or 13, wherein: the user service subscription database and the AF perform data interaction through a session initiation protocol SIP or Diameter protocol, and the AF passes the Gq/Gq' interface and the The PDF/SPDF performs data interaction, and the PDF/SPDF and the A-RACF perform data interaction through the Rq interface.

16. A policy decision function PDF/SPDF entity, comprising: a PDF/SPDF sending unit, a PDF/SPDF receiving unit, and a PDF/SPDF resource decision unit;

The PDF/SPDF resource decision unit processes the resource request received by the receiving unit, and if the quality of service Qos resource requirement in the resource request is not satisfied, performing a shield reduction process according to the degradation information, and further It is judged whether the quality of service Qos resource demand allowed by the user degradation can be satisfied, and if the judgment can be satisfied, the resource request response is sent by the PDF/SPDF transmitting unit.

17. The PDF/SPDF according to claim 16, further comprising a memory for storing user-subscribed degradation information, wherein said PDF/SPDF receiving unit does not receive said degradation information, said PDF/ The SPDF resource decision unit acquires the degradation message from the memory for degradation processing.

18. An access-resource admission control function entity A-RACF, comprising: an A-RACF transmitting unit, an A-RACF receiving unit, an A-RACF resource decision unit; and the A-RACF receiving unit and the The A-RACF resource decision unit is connected, and receives the resource request and the degradation information; the A-RACF sending unit is connected to the A-RACF resource decision unit, and is configured to send the degraded resource information;

19. The A-RACF of claim 18, further comprising a memory for storing user-subscribed degradation information, wherein said A-RACF receiving unit does not receive said degradation information, said A- The RACF resource decision unit obtains the degradation message from the memory To carry out the degradation treatment.