WO2005057872A1 - Procede permettant d'obtenir des services multimedia prioritaires - Google Patents

Procede permettant d'obtenir des services multimedia prioritaires Download PDF

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Publication number
WO2005057872A1
WO2005057872A1 PCT/CN2004/001242 CN2004001242W WO2005057872A1 WO 2005057872 A1 WO2005057872 A1 WO 2005057872A1 CN 2004001242 W CN2004001242 W CN 2004001242W WO 2005057872 A1 WO2005057872 A1 WO 2005057872A1
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WO
WIPO (PCT)
Prior art keywords
priority
request
call control
service
control entity
Prior art date
Application number
PCT/CN2004/001242
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English (en)
French (fr)
Inventor
Jie Wang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP04789901A priority Critical patent/EP1686752B1/en
Priority to DE602004018178T priority patent/DE602004018178D1/de
Publication of WO2005057872A1 publication Critical patent/WO2005057872A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2416—Real-time traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/74—Admission control; Resource allocation measures in reaction to resource unavailability
    • H04L47/745—Reaction in network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/76—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
    • H04L47/765—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions triggered by the end-points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/805—QOS or priority aware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/808—User-type aware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/824—Applicable to portable or mobile terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/2866—Architectures; Arrangements
    • H04L67/30—Profiles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]

Definitions

  • the present invention relates to a technology for processing multimedia services, and in particular, to a method for implementing a multimedia priority service. Background of the invention
  • Priority business services have become an effective means for more and more operators to improve mobile user satisfaction.
  • Priority service refers to dividing mobile users into multiple priority service levels.
  • the network identifies the priority service and provides priority processing over normal services based on the priority level of the mobile user.
  • priority services sent by mobile users with high priority service levels can be processed with high priority to meet the needs of high priority mobile users.
  • the implementation scheme of the voice priority service supported by the 3GPP network is as follows.
  • the voice priority service in the 3GPP network is a subscription service and does not require mobile users to actively perform registration, logout, and other operations. Which mobile users are allowed to use the priority service and set the priority service level of the mobile user is determined by the operator or other agencies.
  • the access level of ordinary mobile users defined by 3GPP is divided into 10 levels from 0 to 9, 1 and 15 are 5 special access levels, which are defined as mobile network use, security services, public agency personnel, and internal employees of operators.
  • the access level of each mobile user is stored in the home subscriber server (HSS) as user subscription data, or / and in the subscriber identity module (SIM) of the mobile user.
  • HSS home subscriber server
  • SIM subscriber identity module
  • Mobile users with a priority service level can decide whether to initiate a priority call for each call.
  • the priority When the mobile user sends a priority call request to the tandem network and the receiving network, the priority
  • the first call request carries a priority service identifier and the priority level of the mobile user.
  • the 3GPP network recognizes that the call request is a priority call according to the priority service identifier carried in the request, and identifies the mobile user based on the priority level of the mobile user carried. Priority level.
  • the originating network and the tandem network When the originating network and the tandem network receive priority call requests, the originating network and the tandem network provide special call progress capabilities, exempting restrictive network management controls, including code control, manual cancellation control, automatic congestion control, and relay Reservation control to increase the likelihood of call completion under severe congestion.
  • restrictive network management controls including code control, manual cancellation control, automatic congestion control, and relay Reservation control to increase the likelihood of call completion under severe congestion.
  • Priority services can be applied to all mobile services, but at this stage 3GPP only provides implementation solutions for circuit-switched voice priority services, while multimedia priority service implementation solutions do not.
  • the main object of the present invention is to provide a method for implementing multimedia-first services, which can implement multimedia-first services, so that the 3GPP network can provide high-quality multimedia services to users of high-priority service levels.
  • a method for implementing a multimedia priority service, setting a priority service level for a user equipment using a multimedia service further includes:
  • a user equipment with a priority service level initiates an initial session protocol service request carrying a priority service identifier to a call control entity;
  • the call control entity After receiving the initial session protocol service request, the call control entity preferentially processes the request according to the priority service level of the user equipment.
  • the call control entity is a proxy call control entity, or a serving call control entity, or / and a query call control entity.
  • the call control entity includes a service call control entity
  • the user equipment priority service level is set in a home user server
  • step A the process of obtaining the priority service level is also included.
  • the user equipment sends a registration request to the serving call control entity
  • the serving call control entity sends a message requesting the subscriber to the home subscriber server.
  • the home user server After receiving the message requesting the user to subscribe, the home user server returns a user subscription message response to the service call control entity carrying the user equipment priority service level. A14.
  • the service call control entity obtains the user equipment from the response. Priority business level.
  • the initial session protocol service request in step A further carries the user equipment priority service level obtained from the user identification module;
  • the step B further includes: the serving call control entity obtains the priority service level of the user equipment from the initial session protocol service request and the user equipment obtained from the home user server. Compare the priority service levels to determine whether they are the same, and if so, according to the priority service level of the user equipment Do not prioritize the request; otherwise, return a failed response to the request to the user equipment and discard the request, or prioritize the request according to the user equipment priority service level obtained from the home user server.
  • the user equipment priority service level is set in a user identification module
  • the initial session protocol service request in step A further carries the user equipment priority service level obtained from the user identification module;
  • the call control entity After receiving the initial session protocol service request in step B, the call control entity obtains the user equipment priority service level from the request, and then preferentially processes the request according to the user equipment priority service level.
  • step B Before step B prioritizes the request according to the priority service level of the user equipment, the method further includes:
  • the call control entity determines whether there are resources available to it. If so, the initial session protocol service request described in step B is processed normally; otherwise, the initial session protocol service request described in step B is processed preferentially.
  • prioritizing the initial session protocol service request described in step B includes:
  • the call control entity queues according to the arrival time of the initial session protocol service request and the priority service level. If the call control entity cannot obtain the priority service level, the call control entity queues according to the arrival time of the initial session protocol service request and the priority service identifier. When the call control entity has available resources, it processes the initial session protocol service request in turn according to the queued order.
  • a timer is preset, and when the initial session protocol service request is queued, the method further includes:
  • call The control entity deletes the queued request and returns an initial session protocol service request failure message to the user equipment that sent the request.
  • prioritizing the initial session protocol service request in step B includes:
  • the call control entity compares whether the priority level of the multimedia service being performed by the user equipment is lower than the priority service level of the initial session protocol service request received by the user equipment, and if so, the call control entity deletes the multimedia level being performed by the user. For services, the resources released in the call control entity are used to process the high-priority initial session protocol service request of the user equipment; if not, the call control entity queues the service request and waits for processing when resources are available.
  • prioritizing the initial session protocol service request described in step B includes:
  • the call control entity compares whether the user equipment priority level of the ongoing multimedia service is lower than the user equipment priority service level of the received initial session protocol service request. If so, the call control entity deletes the ongoing multimedia service and is released from the call control entity. Resources are used to process the received initial session protocol service request of the highest priority of the user equipment; if not, the call control entity queues the service request and waits for processing when resources are available.
  • the method further includes:
  • the user equipment sends a service modification request carrying a priority service identifier
  • the call control entity receiving the request for modifying the priority service identifier performs priority processing on the modification request according to the priority service level of the user equipment.
  • the present invention proposes a solution for implementing a multimedia priority service.
  • the SIP service request carries a priority service identifier, so that the CSCF knows that the UE initiated the multimedia priority service. If the SIP service request also carries the UE's priority service level, the CSCF can obtain it from the SIP service request The UE priority service level; if the SIP service request does not carry the UE priority service level, the CSCF may obtain the UE priority service level stored in advance from the HSS.
  • the CSCF determines a method for processing the SIP service request according to the priority service level of the UE that sends the SIP service request. Therefore, the method provided by the present invention implements a multimedia priority service, so that the 3GPP network can provide a high-quality multimedia service to users of a high priority service level.
  • FIG. 1 is a flowchart of an embodiment of a method for a UE to implement a multimedia priority service according to the present invention. Mode of Carrying Out the Invention
  • the present invention sets a priority service level for the user equipment (UE) of a mobile user using a multimedia service in advance:
  • the priority service level of the mobile user UE does not require the mobile user to actively set and cancel operations, but is determined by the operator or other institutions
  • the priority service level of the UE of the mobile user is divided into 0 ⁇ 10 levels, and the levels of 11 ⁇ 15 are 5 special access levels, which are defined as mobile network use, security services, public agency personnel, emergency services, and internal employees of operators .
  • the priority service level of the UE of each mobile user is stored in the HLR as subscription data of the mobile user, or / and stored in the SIM card of the UE of the mobile user.
  • Mobile users of different priority service levels can decide whether to use the priority service for each multimedia service. If the mobile user decides to use the priority service, the UE of the mobile user sends a SIP service request message when requesting the SIP service, and the header of the SIP service request carries the priority service identifier of the mobile user and a call in the prior art Control entity (CSCF) Logo. After the corresponding CSCF obtains the SIP service request message, it knows that the UE initiated the priority service according to the priority service identifier therein. After the CSCF obtains the UE priority service level, the CSCF initiates the SIP service for the UE according to the UE priority service level. The request message is specially processed to increase the possibility that the UE can successfully access the multimedia service. If the mobile user decides not to use the priority service, the UE normally accesses the multimedia service according to the existing technology.
  • CSCF Control entity
  • the CSCF When the CSCF receives a SIP service request with a priority service identifier sent by the UE, if there are no available wireless channel resources, it queues according to the priority service level of the UE that sent the SIP service request. When the wireless channel resources are available , Processing the SIP service request according to the UE priority service level.
  • the CSCF may include a proxy CSCF (P-CSCF), a serving CSCF (S-CSCF), and a query CSCF (I-CSCF); or it may only include S-CSCF and P-CSCF; or it may be a separate P-CSCF CSCF.
  • P-CSCF proxy CSCF
  • S-CSCF serving CSCF
  • I-CSCF query CSCF
  • FIG. 1 is a flowchart of an embodiment of a method for implementing a multimedia priority service by a UE according to the present invention.
  • a preset priority service level of the UE is stored not only in the HSS but also in a SIM card.
  • the entities include: UE, P-CSCF, S-CSCF and HSS.
  • the specific process is as follows:
  • Step 100 The UE that has applied for the multimedia priority service initiates a registration request to the S-CSCF;
  • Step 101 The S-CSCF that receives the registration request sends a message to the HSS requesting user subscription information.
  • Step 102 After receiving the message requesting user subscription information, the HSS returns a user subscription information request response to the S-CSCF, which carries the user's priority service level for the UE.
  • Step 103 The UE initiates a SIP service to the P-SCSF. A request, where the request carries a priority service identifier and the UE priority service level, and the UE priority service level is obtained from the SIM;
  • Step 104 The P-SCSF identifies the priority service identifier in the SIP service request, and saves the priority service level of the SIP service request.
  • the P-SCSF determines whether it has available resources. If so, it follows the normal process in the prior art. Otherwise, if the P-SCSF is considered to be blocked, special processing is performed on the SIP service request;
  • the P-SCSF After the P-SCSF processes the SIP service request, it sends a SIP service request message to the S-SCSF, where the message carries a priority service identifier and a priority service level;
  • Step 105 The S-SCSF identifies the priority service identifier and priority service level in the SIP service request, and compares the priority service level obtained from the SIP service request with the priority service level of the UE obtained in advance from the HSS: if the same To determine whether the S-SCSF has available resources, and if so, proceed according to the normal process in the prior art; otherwise, consider that the S-SCSF is blocked and perform special processing on the SIP service request; if not, send the request to the The UE returns a response that the SIP service request failed, and discards the SIP service request.
  • the S-CSCF may also determine the priority service level of the UE obtained from the HSS.
  • the SIP service request is processed accordingly, that is, whether the S-SCSF has available resources, and if so, it is processed according to the normal process in the prior art; otherwise, the S-SCSF is considered to be blocked, and the SIP service request is specially processed. deal with.
  • the S-SCSF After the S-SCSF has processed the SIP service request, the S-SCSF sends a response to the SIP service request message to the 3GPP network where the UE is located.
  • the response message contains the priority service identifier, which may or may not include the SIP service request. Priority business level.
  • step 103 When the process of step 103 above is that the SIP service request initiated by the UE only carries the priority service identifier and does not carry the priority service level of the UE, the SIP service request sent by the P-SCSF to the S-CSCF also carries only the priority service identifier. Without carrying the priority service level of the UE, the P-SCSF cannot distinguish the priority level for SIP call requests with a priority service identifier; S-CSCF Follow-up processing is performed according to the UE priority service level obtained in advance from the HSS.
  • the above SIM card is a general name of a subscriber identity module in the UE, and can store subscription information of a second generation mobile network, subscription information of a third generation mobile network, and subscription information of a multimedia service.
  • I-SCSF When I-SCSF exists between P-SCSF and S-SCSF, I-SCSF transparently transmits the message received from P-SCSF or S-SCSF to the other party, and identifies the priority service identifier and UE priority service carried in the message. Levels are also transparently transmitted. I-SCSF's processing of the UE's multimedia priority service is consistent with P-SCSF and S-SCSF, that is, when resources are available, it is processed according to the normal process in the prior art, and if congestion occurs, the SIP service request is specially processed.
  • the processing process is the same as that of S-SCSF, I-SCSF, and C-SCSF, that is, when resources are available, it is processed according to the normal process in the existing technology. When congestion occurs, special processing is performed on the SIP service request.
  • CSCF including P-SCSF, I-SCSF, and S-SCSF, performs special processing on the SIP service request carrying the priority service identifier and the UE's priority service level when congestion occurs.
  • the processing process is as follows:
  • the CSCF determines whether the user equipment priority level of the ongoing multimedia service of the UE is lower than the UE priority level of the received service request, and if it is , Delete the low-priority multimedia service being performed by the UE, so that the resources released in the CSCF can process the SIP service request of the UE's high-priority UE; otherwise, the CSCF queues the received SIP service request, waiting for the Processed when resources are available.
  • P-SCSF, I-SCSF or S-SCSF queues SIP service requests based on the arrival time and priority service level of the SIP service request, and when resources are available,
  • the SIP service request is processed in the queue in sequence, and the response of the SIP service request is returned to the UE.
  • a timer can be started, the SIP service request is deleted after the timer expires, and the SIP service request fails. Response to the UE;
  • I-SCSF and P-SCSF can only respond to SIP based on the arrival time and priority service identifier of the SIP service request. Business requests are queued.
  • the CSCF determines whether the UE priority level of the ongoing multimedia service is lower than the UE priority level of the received SIP service request, and if so, deletes one or more An ongoing low-priority multimedia service for the UE enables the resources released in the CSCF to process SIP service requests for the high-priority UE; otherwise, the CSCF queues the received SIP service requests and waits for processing when resources are available.
  • the modification of the SIP service request may or may not carry a priority service identifier, and the CSCF has saved the priority service identifier. If the CSCF has available resources, the normal SIP service request is processed according to the prior art. If the CSCF is congested, the SIP service request is specially processed.
  • the special processing process is the same as the above SIP service request. The special process is the same.
  • the CSCF charging information needs to include priority service identification information.
  • the CSCF charging information also includes the UE priority service level;
  • the CSCF charging information may or may not include the UE priority service level.
  • the CSCF does not support the priority service of multimedia, that is, the priority service identifier carried in the SIP service request is not recognized, the parameters related to the priority service are ignored, and SIP is processed according to the prior art
  • the service request process is processed; if the CSCF does not support special processing of the multimedia priority service, the parameters related to the priority service are ignored, and processing is performed according to the process of processing a SIP service request in the prior art.
  • the interworking gateway When a 3GPP network that supports multimedia priority services communicates with an external network, it is required that the interworking gateway also supports the multimedia priority service and maps the user levels of different networks.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Computer And Data Communications (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Description

一种实现多媒体优先业务的方法
技术领域
本发明涉及多媒体业务的处理技术， 特别涉及一种实现多媒体优先 业务的方法。 发明背景
随着移动用户对移动网络服务质量的要求不断上升， 根据不同目标 移动用户群体提供不同的服务质量， 已成为运营商普遍关注的课题。 优 先业务服务已成为越来越多运营商提高移动用户满意度的有效手段。 优 先服务是指将移动用户分成多个优先业务级别， 当移动用户请求优先业 务时， 网络识别优先业务并根据移动用户的优先业务级别， 提供高于普 通业务的优先处理。 在网络发生拥塞或资源不足的情况下， 高优先业务 级別的移动用户发送的优先业务可得到高优先级的处理， 满足高优先级 移动用户的需求。
目前， 3GPP网络支持的语音优先业务的实现方案如下。
3GPP网络中的语音优先业务属于一种签约业务 不需要移动用户主 动进行注册、 退出等操作。 允许哪些移动用户使用优先业务和设置移动 用户的优先业务级别由运营商或其他机构决定。 3GPP 定义的普通移动 用户接入级别分为 0〜9共 10个等级， 1卜 15是 5个特殊接入级别， 分别 定义为移动网络使用、 安全业务、 公共机构人员和运营商内部员工。 每 个移动用户的接入级别作为用户签约数据保存在归属用户服务器（ HSS ) 中， 或 /和保存在该移动用户的用户标识模块 （SIM ) 中。
具有优先业务级别的移动用户可以针对每次呼叫决定是否发起优先 呼叫。 当该移动用户向汇接网络和收端网络发送优先呼叫请求时， 该优 先呼叫请求中携带有优先业务标识和该移动用户的优先级别， 3GPP 网 络根据该请求携带的优先业务标识识别该呼叫请求是优先呼叫， 根据携 带的该移动用户的优先级别识別该移动用户的优先级别。
当发端网络和汇接网络接收到优先呼叫请求后， 发端网络和汇接网 络中提供特殊的呼叫进展能力， 免除限制性的网絡管理控制， 包括码控 制、 手工取消控制、 自动拥塞控制和中继预留控制， 以提高严重拥塞下 呼叫完成的可能性。 当汇接网络占用局间中继电路时， 按照优先呼叫请 求的优先业务级别高低进行排队； 当汇接网络不占用局间中继电路时， 按照排队的顺序依次处理优先呼叫请求。
当发端没有可用的无线信道资源时， 才艮据呼叫优先级和到达时间进 行排队； 当发端的无线信道资源可用时， 按照排队的顺序依次处理优先 呼叫请求。
优先业务可以应用于所有移动业务， 但现阶段 3GPP只提供电路交 换语音优先业务的实现方案， 多媒体优先业务的实现方案却没有提供。
在多媒体业务的初始会话协议（ SIP )的消息头中提供与优先级相关 的两个参数： 资源优先级参数和接受的优先级参数， 其主要是为网际协 议 （IP ) 多媒体系统紧急呼叫业务使用的， 没有针对不同接入级别的移 动用户区分业务优先业务级别。 因此， 如何在多媒体业务中实现优先业 务是一个亟待解决的问题。 发明内容
有鉴于此， 本发明的主要目的在于提供一种实现多媒体优先业务的 方法， 该方法能够实现多媒体优先业务， 从而使 3GPP网络可以为高优 先业务级别的用户提供高服务质量的多媒体业务。
根据上述发明目的， 本发明的具体技术方案是这样实现的： 一种实现多媒体优先业务的方法， 给使用多媒体业务的用户设备设 置优先业务级别， 该方法还包括：
A、 具有优先业务级别的用户设备向呼叫控制实体发起携带优先业 务标识的初始会话协议业务请求；
B、 呼叫控制实体收到所述初始会话协议业务请求后， 根据该用户 设备优先业务级别对该请求进行优先处理。
所述呼叫控制实体为代理呼叫控制实体、 或 /和服务呼叫控制实体、 或 /和查询呼叫控制实体。
当呼叫控制实体包括服务呼叫控制实体， 所述的用户设备优先业务 级别设置在归属用户服务器中时；
在步骤 A之前， 还包括获取优先业务级别的过程 .·
Al l , 用户设备向服务呼叫控制实体发送登记请求；
A12、 服务呼叫控制实体向归属用户服务器发送请求该用户签约的 消息；
A13、 归属用户服务器收到该请求用户签约的消息后， 返回给服务 呼叫控制实体携带有该用户设备优先业务级别的用户签约消息响应； A14、 服务呼叫控制实体从该响应中获取到该用户设备优先业务级 别。
当所述的用户设备优先业务级别还设置在用户标识模块中时； 步骤 A中所述初始会话协议业务请求中进一步携带有从所述用户标 识模块中获取的该用户设备优先业务级别；
步骤 B根据该用户设备优先业务级别对该请求进行优先处理之前， 还包括： 服务呼叫控制实体将从该初始会话协议业务请求中获取该用户 设备优先业务级别和从归属用户服务器获取的该用户设备优先业务级 别进行比较， 判断两者是否相同， 如果是， 根据该用户设备优先业务级 别对该请求进行优先处理； 否则， 向该用户设备返回该请求的失败响应 并丟弃该请求， 或者按照从归属用户服务器获取的该用户设备优先业务 级别对该请求进行优先处理。
所述的用户设备优先业务级别设置在用户标识模块中；
步骤 A中所述初始会话协议业务请求中进一步携带有从所述用户标 识模块获取的该用户设备优先业务级别；
步骤 B中呼叫控制实体收到所述初始会话协议业务请求后， 从该请 求中获取该用户设备优先业务级别， 然后根据该用户设备优先业务级别 对该请求进行优先处理。
在步骤 B 根据该用户设备优先业务级别对该请求进行优先处理之 前， 该方法还包括：
呼叫控制实体判断自身是否存在可用的资源， 如果是， 对步骤 B所 述初始会话协议业务请求正常处理， 否则， 对步骤 B所述初始会话协议 业务请求进行优先处理。
当呼叫控制实体收到一个以上携带有用户设备优先业务标识的初始 会话协议业务请求时，对步驟 B所述初始会话协议业务请求进行优先处 理包括：
呼叫控制实体根据初始会话协议业务请求的到达时间和优先业务级别 的高低进行排队， 如果呼叫控制实体无法获取到优先业务级别， 则根据 初始会话协议业务请求的到达时间和优先业务标识的高低进行排队， 当 呼叫控制实体有可用资源时， 按照排队的顺序依次处理初始会话协议业 务请求。
预先设置定时器， 当所述初始会话协议业务请求进行排队时， 该方 法进一步包括：
针对每个进入排队队列的请求启动定时器， 如果定时器超时， 呼叫 控制实体删除该正在排队的请求， 向发送该请求的用户设备返回初始会 话协议业务请求失败消息。
当呼叫控制实体中存在该用户设备正在进行的多媒体业务时， 对步 骤 B所述初始会话协议业务请求进行优先处理包括：
呼叫控制实体比较该用户设备正在进行的多媒体业务的优先级别是 否低于收到的该用户设备的初始会话协议业务请求的优先业务级别， 如 果是， 呼叫控制实体删除该用户正在进行的优先级别多媒体业务， 呼叫 控制实体中释放的资源用来处理该用户设备的高优先级别的初始会话 协议业务请求； 如果否， 呼叫控制实体将该业务请求进行排队， 等待有 可用资源时进行处理。
当呼叫控制实体中存在激活的多媒体业务时， 对步骤 B所述初始会 话协议业务请求进行优先处理包括：
呼叫控制实体比较正在进行的多媒体业务的用户设备优先级别是否 低于收到的初始会话协议业务请求的用户设备优先业务级别， 如果是， 呼叫控制实体删除正在进行的多媒体业务， 呼叫控制实体中释放的资源 用来处理收到的用户设备最高优先级别的初始会话协议业务请求； 如果 否，呼叫控制实体将该业务请求进行排队，等待有可用资源时进行处理。
该方法进一步包括：
C、 用户设备发送携带优先业务标识的业务修改请求；
D、 接收到该携带有优先业务标识修改请求的呼叫控制实体根据该 用户设备优先业务级别， 对该修改请求进行优先处理。
根据上述方案可以看出，本发明提出了实现多媒体优先业务的方案， 在 UE发起 SIP业务请求时， 该 SIP业务请求携带优先业务标识， 从而 使 CSCF得知该 UE发起了多媒体优先业务。 如果该 SIP业务请求中还 携带有该 UE优先业务级别， 则 CSCF可以从该 SIP业务请求中获取到 该 UE优先业务级別； 如果该 SIP业务请求中没有携带该 UE优先业务 级别，则 CSCF可以从该 HSS中获取到预先存储的该 UE优先业务级别。 CSCF根据发送该 SIP业务请求的 UE优先业务级别的高低， 确定处理 该 SIP业务请求的方法。 因此， 本发明提供的方法实现了多媒体优先业 务， 从而使 3GPP网络可以为高优先业务级别的用户提供高服务质量的 多媒体业务。 附图简要说明
图 1为本发明 UE实现多媒体优先业务方法实施例的流程图。 实施本发明的方式
为了使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施 例并参照附图， 对本发明进行进一步详细说明。
本发明预先给使用多媒体业务的移动用户的用户设备（UE )设置优 先业务级别： 移动用户的 UE的优先业务级别不需要移动用户主动进行 设置和取消等操作， 而是由运营商或其他机构决定该移动用户的 UE的 优先业务级别。 普通移动用户的 UE的优先业务级别分为 0〜10个等级， 11~15的等级是 5个特殊接入级别， 定义为移动网络使用、 安全业务、 公共机构人员、 紧急业务和运营商内部员工。 每个移动用户的 UE的优 先业务级别作为该移动用户的签约数据保存在 HLR中， 或 /和保存在该 移动用户的 UE的 SIM卡中。
不同优先业务级别的移动用户针对每个多媒体业务可以决定是否使 用优先业务。 如果该移动用户决定使用优先级业务， 则该移动用户的 UE在请求 SIP业务时，发送 SIP业务请求消息，该 SIP业务请求消息头 中携帶该移动用户的优先业务标识、现有技术中的呼叫控制实体（ CSCF ) 标识。 相应的 CSCF得到该 SIP业务请求消息后， 根据其中优先业务标 识得知该 UE发起了优先业务， 该 CSCF获取到该 UE优先业务级别后， 根据该 UE优先业务级别对该 UE发起的该 SIP业务请求消息进行特殊 的处理， 提高该 UE接入多媒体业务成功的可能性。 如果该移动用户决 定不使用优先级业务， 则该 UE按照现有技术正常接入多媒体业务。
CSCF当接收到 UE发送的携带有优先业务标识的 SIP业务请求时， 如果没有存在着可用的无线信道资源，则根据发送 SIP业务请求的该 UE 的优先业务级别进行排队， 当无线信道资源可用时， 则按照该 UE优先 业务级别处理该 SIP业务请求。
本发明所述的 CSCF可以包括代理 CSCF ( P-CSCF )、 服务 CSCF ( S-CSCF )和查询 CSCF( I-CSCF );或者可以只包括 S-CSCF 和 P-CSCF; 或者只是单独的 P-CSCF。
图 1为本发明 UE实现多媒体优先业务方法实施例的流程图，如图 1 所示， 预先设置的该 UE优先业务级别不仅保存在 HSS 中， 还保存在 SIM卡中， 该实现多媒体优先业务的实体包括： UE、 P-CSCF, S-CSCF 和 HSS, 其具体过程为：
步骤 100、已经申请了多媒体优先业务的 UE向 S-CSCF发起登记请 求；
步骤 101、 收到该登记请求的 S-CSCF向 HSS发送请求用户签约信 息的消息；
步骤 102、 HSS 收到该请求用户签约信息的消息后， 向该 S-CSCF 返回用户签约信息请求响应 , 其中携带有该 UE的用户优先业务级别； 步骤 103、 该 UE向 P-SCSF发起 SIP业务请求， 该请求中携带有优 先业务标识和该 UE优先业务级别， 该 UE优先业务级别是从 SIM获取 的； 步骤 104、 P-SCSF识別该 SIP业务请求中优先业务标识， 并保存该 SIP业务请求的优先业务级别， P-SCSF判断自身是否有可用资源， 如果 有， 则按照现有技术中的正常流程处理； 否则， 认为 P-SCSF发生堵塞， 则对该 SIP业务请求进行特殊处理；
P-SCSF处理该 SIP业务请求后，向 S-SCSF发送 SIP业务请求消息， 该消息中携带有优先业务标识和优先业务级别；
步骤 105、 S-SCSF识别该 SIP业务请求中优先业务标识和优先业务 级别，将从该 SIP业务请求中得到的优先业务级别和从 HSS中预先获取 到的该 UE优先业务级别相比较： 若相同， 判断该 S-SCSF是否有可用 资源， 如果有， 则按照现有技术中的正常流程处理， 否则， 认为 S-SCSF 发生堵塞， 对该 SIP业务请求进行特殊处理； 若不相同， 则向该 UE返 回 SIP业务请求失败的响应， 丟弃该 SIP业务请求。
当 S-SCSF从该 SIP业务请求中得到的优先业务级别和从 HSS中预 先获取到的该 UE优先业务级别不相同时， S-CSCF也可以按照从 HSS 中获取到的该 UE优先业务级别对该 SIP业务请求进行相应的处理， 即 判断该 S-SCSF是否有可用资源， 如果有， 则按照现有技术中的正常流 程处理； 否则， 认为 S- SCSF发生堵塞， 对该 SIP业务请求进行特殊处 理。
当 S-SCSF处理完该 SIP业务请求后， S-SCSF向该 UE所在的 3GPP 网络发送该 SIP业务请求消息的响应，该响应消息中包含优先业务标识， 可以包含或者不包含该 SIP业务请求的优先业务级别。
当上述步骤 103的过程为 UE发起的 SIP业务请求中只携带优先业 务标识， 不携带该 UE的优先业务级别， 则 P-SCSF发给 S-CSCF的 SIP 业务请求中也只携带优先业务标识， 不携带该 UE 的优先业务级别， P-SCSF对有优先业务标识的 SIP呼叫请求不能区别优先级别； S-CSCF 根据预先从 HSS中获取到的该 UE优先业务级别进行后续处理。
上述 SIM卡是 UE中用户标识模块的通称， 可以存储第二代移动网 络签约信息， 第三代移动网络签约信息和多媒体业务的签约信息。
当 P-SCSF和 S-SCSF之间存在 I-SCSF时， I-SCSF将从 P-SCSF或 S-SCSF收到的消息透传给另一方， 对消息中所携带优先业务标识和 UE 优先业务级别也进行透传。 I-SCSF 对 UE 的多媒体优先业务的处理与 P-SCSF和 S-SCSF—致， 即有可用资源时按照现有技术中的正常流程处 理， 如果发生拥塞则对该 SIP业务请求进行特殊处理。
当 3GPP网络的 UE向被叫网络的 CSCF发起携带有优先业务标识 和该 UE优先业务级别的 SIP业务请求后， 被叫网络中的 CSCF根据该 SIP业务请求中的优先业务标识和该 SIP业务请求的 UE优先业务级别， 对该 SIP业务请求进行处理， 其处理过程与 S-SCSF、 I-SCSF和 C-SCSF 的处理过程一样， 即有可用资源时按照现有技术中的正常流程处理， 如 果发生拥塞则对该 SIP业务请求进行特殊处理。
CSCF, 包括 P-SCSF、 I-SCSF和 S-SCSF发生拥塞时, 对携带有优 先业务标识和该 UE优先业务级别的 SIP业务请求进行特殊处理， 该处 理过程如下：
( 1 )如果 CSCF中存在发起 SIP业务请求的该 UE的正在进行的多 媒体业务， CSCF判断该 UE正在进行的多媒体业务的用户设备优先级 别是否低于收到的业务请求的 UE优先级别， 如果是， 则删除该 UE正 在进行的低优先级的多媒体业务，使 CSCF中释放的资源可以处理该 UE 的 UE高优先级别的 SIP业务请求； 否则， CSCF对收到的 SIP业务请求 进行排队， 等待有可用资源时进行处理。
( 2 ) P-SCSF, I-SCSF或 S-SCSF根据发起 SIP业务请求的到达时 间和优先业务级别对 SIP业务请求进行排队， 当有可用资源时， 按照等 待队列中顺序处理 SIP业务请求， 并返回该 SIP业务请求的响应给 UE; 对于排队等候的 SIP业务请求，可启动定时器，定时器超时后删除该 SIP 业务请求， 并返回该 SIP业务请求失败的响应给 UE;
当 SIP业务请求中不携带用户设备的优先级别时， 由于 I-SCSF和 P-SCSF无法和 HSS通信， 所以 I-SCSF和 P-SCSF只能根据 SIP业务请 求的到达时间和优先业务标识对 SIP业务请求进行排队。
( 3 )如果 CSCF中存在其它 UE的正在进行的多媒体业务， CSCF 判断正在进行的多媒体业务的 UE优先级别是否低于收到的 SIP业务请 求的 UE优先级别， 如果是， 则删除某个或多个正在进行的 UE低优先 级别的多媒体业务， 使 CSCF中释放的资源可以处理 UE高优先级别的 SIP业务请求； 否则， CSCF对收到的 SIP业务请求进行排队， 等待有可 用资源时进行处理。
当 UE发起 SIP业务请求成功后，若该 UE发起修改 SIP业务请求给 CSCF, 则该修改 SIP业务请求可以携带或不携带优先业务标识， CSCF 已经保存了优先业务标识。 如果 CSCF有可用资源， 则按照现有技术中 对该修改 SIP业务请求进行正常流程处理； 如果 CSCF发生拥塞， 则对 该修改 SIP业务请求进行特殊的处理， 其特殊处理的过程与上述 SIP业 务请求的特殊处理过程相同。
当 CSCF对 SIP业务请求进行计费时， 在 CSCF计费信息中需要包 含优先业务标识信息， 当运营商对不同的优先业务级别收费不同时， 该 CSCF计费信息中还包含 UE优先业务级别； 当运营商对不同的优先业 务级别收费相同时， 该 CSCF计费信息中可以包含或不包含 UE优先业 务级别。
如果 CSCF不支持多媒体的优先业务， 即不识别 SIP业务请求携带 的优先业务标识，则忽略优先业务相关的参数，按照现有技术中处理 SIP 业务请求的过程进行处理； 如果 CSCF不支持对多媒体优先业务进行特 殊的处理， 则忽略优先业务相关的参数， 按照现有技术中处理 SIP业务 请求的过程进行处理。
当支持多媒体优先业务的 3GPP 网络与外部网络互通时， 需要互通 网关也支持该多媒体优先业务， 并对不同网络的用户级别进行映射。
以上所述仅为本发明的校佳实施例而已， 并不用以限制本发明， 凡 在本发明的精神和原则之内所做的任何修改、 等同替换和改进等， 均应 包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种实现多媒体优先业务的方法， 其特征在于， 给使用多媒体业 务的用户设备设置优先业务级别， 该方法还包括：
A、 具有优先业务级别的用户设备向呼叫控制实体发起携带优先业 务标识的初始会话协议业务请求；
B、 呼叫控制实体收到所述初始会话协议业务请求后， 根据该用户 设备优先业务级别对该请求进行优先处理。
2、 如权利要求 1所述的方法， 其特征在于， 所述呼叫控制实体为代 理呼叫控制实体、 或 /和服务呼叫控制实体、 或 /和查询呼叫控制实体。
3、 如权利要求 2所述的方法， 其特征在于， 当呼叫控制实体包括服 务呼叫控制实体， 所述的用户设备优先业务级别设置在归属用户服务器 中时；
在步骤 A之前， 还包括获取优先业务级别的过程：
A 11、 用户设备向服务呼叫控制实体发送登记请求；
A12、 服务呼叫控制实体向归属用户服务器发送请求该用户签约的 消息；
A13、 归属用户服务器收到该请求用户签约的消息后， 返回给服务 呼叫控制实体携带有该用户设备优先业务级别的用户签约消息响应； A 14、 服务呼叫控制实体从该响应中获取到该用户设备优先业务级 别。
4、 如权利要求 3所述的方法， 其特征在于， 当所述的用户设备优先 业务级别还设置在用户标识模块中时；
步骤 A中所述初始会话协议业务请求中进一步携带有从所述用户标 识模块中获取的该用户设备优先业务级别； 步骤 Β·根据该用户设备优先业务级别对该请求进行优先处理之前， 还包括： 服务呼叫控制实体将从该初始会话协议业务请求中获取该用户 设备优先业务级别和从归属用户服务器获取的该用户设备优先业务级 别进行比较， 判断两者是否相同， 如果是， 根据该用户设备优先业务级 别对该请求进行优先处理； 否则， 向该用户设备返回该请求的失败响应 并丢弃该请求， 或者按照从归属用户服务器获取的该用户设备优先业务 级别对该请求进行优先处理。
5、 如权利要求 1所述的方法， 其特征在于， 所述的用户设备优先业 务级别设置在用户标识模块中；
步驟 Α中所述初始会话协议业务请求中进 步携带有从所述用户标 识模块获取的该用户设备优先业务级别；
步驟 B中呼叫控制实体收到所述初始会话协议业务请求后， 从该请 求中获取该用户设备优先业务级别， 然后根据该用户设备优先业务级别 对该请求进行优先处理。
6、 如权利要求 1所述的方法， 其特征在于， 在步骤 B根据该用户 设备优先业务级别对该请求进行优先处理之前， 该方法还包括：
呼叫控制实体判断自身是否存在可用的资源， 如果是， 对步骤 B所 述初始会话协议业务请求正常处理， 否则， 对步骤 B所述初始会话协议 业务请求进行优先处理。
7、 如权利要求 6所述的方法， 其特征在于， 当呼叫控制实体收到一 个以上携带有用户设备优先业务标识的初始会话协议业务请求时， 对步 驟 B所述初始会话协议业务请求进行优先处理包括：
呼叫控制实体根据初始会话协议业务请求的到达时间和优先业务级别 的高低进行排队， 如果呼叫控制实体无法获取到优先业务级别， 则根据 初始会话协议业务请求的到达时间和优先业务标识的高低进行排队， 当 呼叫控制实体有可用资源时， 按照排队的顺序依次处理初始会话协议业 务请求。
8、 如权利要求 7所述的方法， 其特征在于， 预先设置定时器， 当所 述初始会话协议业务请求进行排队时， 该方法进一步包括：
针对每个进入排队队列的请求启动定时器， 如果定时器超时， 呼叫 控制实体删除该正在排队的请求， 向发送该请求的用户设备返回初始会 话协议业务请求失败消息。
9、 如权利要求 6所述的方法， 其特征在于， 当呼叫控制实体中存在 该用户设备正在进行的多媒体业务时，对步驟 B所述初始会话协议业务 请求进行优先处理包括：
呼叫控制实体比较该用户设备正在进行的多媒体业务的优先级别是 否低于收到的该用户设备的初始会话协议业务请求的优先业务级别， 如 果是， 呼叫控制实体删除该用户正在进行的优先级别多媒体业务， 呼叫 控制实体中释放的资源用来处理该用户设备的高优先级别的初始会话 协议业务请求； 如果否， 呼叫控制实体将该业务请求进行排队， 等待有 可用资源时进行处理。
10、 如权利要求 6所述的方法， 其特征在于， 当呼叫控制实体中存 在敎活的多媒体业务时，对步骤 B所述初始会话协议业务请求进行优先 处理包括：
呼叫控制实体比较正在进行的多媒体业务的'用户设备优先级别是否 低于收到的初始会话协议业务请求的用户设备优先业务级别， 如果是， 呼叫控制实体删除正在进行的多媒体业务， 呼叫控制实体中释放的资源 用来处理收到的用户设备最高优先级别的初始会话协议业务请求； 如果 否，呼叫控制实体将该业务请求进行排队，等待有可用资源时进行处理。
11、 如权利要求 1所述的方法， 其特征在于， 该方法进一步包括： C 用户设备发送携带优先业务标识的业务修改请求；
D、 接收到该携带有优先业务标识修改请求的呼叫控制实体根据该 用户设备优先业务级别， 对该修改请求进行优先处理。
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