WO2010081339A1 - 网络优先级控制方法、装置及*** - Google Patents
网络优先级控制方法、装置及*** Download PDFInfo
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- WO2010081339A1 WO2010081339A1 PCT/CN2009/074569 CN2009074569W WO2010081339A1 WO 2010081339 A1 WO2010081339 A1 WO 2010081339A1 CN 2009074569 W CN2009074569 W CN 2009074569W WO 2010081339 A1 WO2010081339 A1 WO 2010081339A1
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- Prior art keywords
- user terminal
- priority
- session
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Classifications
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- 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
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- 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]
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- 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
- H04L65/1066—Session management
- H04L65/1073—Registration or de-registration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Definitions
- the invention relates to a network priority control method, device and system, and belongs to a network communication technology. Background technique
- the priority control is mainly through the Resource-Priority Header (RPH) and the accepted resource priority header field (
- RH Resource-Priority Header
- ARPH Accept-Resource-Priority Header
- the trusted terminal of the core network carries the predefined resource priority to implement the priority processing of the corresponding service.
- this method is only used for the priority of different services, and cannot be prioritized for users.
- the above RPH and ARPH information are specified by the terminal, and lack of high credibility;
- the priority policy is only processed on both the Session Initiation Protocol (SIP) terminal and the SIP server. Therefore, when an emergency occurs, the priority access of the high priority user cannot be guaranteed. For example, in a disaster scenario such as an earthquake or a fire, a large number of call requests may occur, which may cause core network flow control. When high load flow control occurs, special personnel such as the disaster succession success rate cannot be guaranteed.
- SIP Session Initiation Protocol
- the present invention provides a network priority control method, apparatus, and system, which can clarify the priority of a user in an IMS system, thereby preferentially ensuring session connection of a high priority user.
- an embodiment of the present invention provides a network priority control method, including:
- HSS Subscriber Server
- the priority information of the binding is searched according to the terminal information of the user terminal, and the bandwidth resource is reserved for the user terminal with high priority according to the priority information.
- a PCSCF physical device including:
- An obtaining module configured to obtain, after receiving a registration request from the user terminal, the priority information of the user terminal from the HSS;
- a binding module configured to bind the priority information acquired by the acquiring module to the terminal information of the user terminal;
- the resource management module is configured to search for the priority information bound by the binding module according to the terminal information, and reserve bandwidth resources for the user terminal with high priority.
- IP multimedia subsystem including:
- a PCSCF entity device configured to: after receiving a registration request from the user terminal, obtain priority information of the user terminal from the HS S; and bind the priority information to the terminal information of the user terminal;
- the terminal information of the user terminal searches for the priority information of the binding, and reserves bandwidth resources for the user terminal with high priority according to the priority information;
- the HSS is configured to send, according to the request of the PCSCF entity device, priority information of the corresponding user terminal to the PCSCF entity device.
- the PCSCF entity device can obtain the priority information of the user terminal, and therefore, when the bandwidth resource is occupied in a large amount and cannot access the network, the PCSCF entity device can make the packet based on the priority information obtained by the PCSCF.
- the priority user terminal preferentially accesses the network and establishes a session, so that in an emergency such as an earthquake or a fire, priority is given to meeting the needs of certain users with special needs to establish a session, thereby avoiding conversation due to flow control or insufficient resources.
- the request is rejected, which improves the success rate of these high-priority users and increases the ability of emergency handling.
- FIG. 1 is a flowchart of a network priority control method according to Embodiment 1 of the present invention
- FIG. 2 is a flowchart of a network priority control method according to Embodiment 2 of the present invention
- a signaling flow chart of the registration process in the network priority control method
- FIG. 4 is a schematic diagram of a data structure of an extended user model according to Embodiment 2 of the method of the present invention
- FIG. 5 is a signaling flowchart of a resource preemption process in a network priority control method according to Embodiment 2 of the present invention
- FIG. 6 is a flowchart of a network priority control method according to Embodiment 3 of the method of the present invention
- FIG. 7 is a signaling flowchart of a resource reservation process in a network priority control method according to Embodiment 3 of the present invention
- FIG. 8 is a schematic structural diagram of an IP multimedia subsystem according to Embodiment 1 of the apparatus and system of the present invention
- FIG. 9 is a schematic structural diagram of a resource management module 13 in an IP multimedia subsystem according to Embodiment 2 of the apparatus and system of the present invention
- FIG. 10 is a schematic structural diagram of a resource management module 13 in an IP multimedia subsystem according to Embodiment 3 of the apparatus and system of the present invention. detailed description
- This embodiment provides a network priority control method. As shown in FIG. 1 , the method includes the following steps: Step 101: After receiving a registration request from a user terminal, the home subscriber server (Home Subscriber Server, HSS for short) Obtaining priority information of the user terminal;
- the home subscriber server Home Subscriber Server, HSS for short
- the proxy call control function Proxy-Call Session Control Function, PCSCF
- the access gateway control function Acces s Gateway Control Function, AGCF
- PCSCF Serving-Call Session Control Function
- the Serving-Call Session Control Function (SCSCF) entity device obtains the priority information of the user terminal from the HSS.
- PCSCF and SCSCF are called physical devices, they can be used as part of the logic in the device.
- Step 102 Binding the priority information to the terminal information of the user terminal.
- the terminal information may be the identity information or the access information of the user terminal, and the identifier information may be an IP Multimedia Public Identity (IP Multimedia Public Identity, Abbreviation: IMPU), the access information can be the I ⁇ address used by the user to access;
- IP Multimedia Public Identity Abbreviation: IMPU
- Step 103 Search for the binding priority information according to the terminal information of the user terminal, and reserve bandwidth resources for the user terminal with high priority according to the priority information.
- the bandwidth resource may be reserved before receiving the session request initiated by the user terminal with the high priority; or after the session request initiated by the user terminal with the high priority is received, the user who has established the session may be The terminal preempts the bandwidth resource and reserves it for the high priority user terminal.
- the priority policy is only processed on both the SIP terminal and the SIP server.
- the PCSCF entity device and the SCSCF entity device in the IMS network do not process the RPH and the ARPH information. Therefore, the behavior of the intermediate path processing the information is not determined.
- the behavior of the bearer device to reserve sufficient resources and bandwidth according to the priority cannot be determined.
- the PCSCF physical device is the first physical device facing the traffic impact in the IMS network, which does not contain user data, priority access of high priority users cannot be guaranteed when an emergency occurs.
- the PCSCF entity device needs to know in advance which network or network segment IP addresses need to be defined high. Priority, therefore, the feasibility of implementation is not high. Therefore, the PCSCF entity device or the AGCF entity device can obtain the priority information of the user terminal by using the method in this embodiment.
- the user terminal of the first level preferentially accesses the network and establishes a session, so that in an emergency such as an earthquake or a fire, the user needs to meet the needs of establishing a session with certain special needs, thereby avoiding the session caused by flow control or insufficient resources.
- the request is rejected, which improves the success rate of these high-priority users and increases the ability of emergency handling.
- the user terminal successfully logs out on the network, that is, when the PCSCF entity device receives the logout success response (REG I STER 2000K) message sent by the network side, the locally saved user data may be deleted, including the The priority information of the user terminal. Therefore, after receiving the registration request of the user terminal again, the priority information of the user terminal is re-acquired from the HSS.
- the PCSCF entity device receives the logout success response (REG I STER 2000K) message sent by the network side
- the locally saved user data may be deleted, including the The priority information of the user terminal. Therefore, after receiving the registration request of the user terminal again, the priority information of the user terminal is re-acquired from the HSS.
- This embodiment provides another network priority control method.
- the first user terminal has established a session in the network, and the PCSCF entity device obtains the first user terminal to obtain from the HSS during the registration process.
- Priority information of the first user terminal As shown in Figure 2, the following steps are included:
- Step 201 After receiving the registration request from the second user terminal, the PCSCF entity device acquires priority information of the user terminal from the HSS.
- the PCSCF entity device may obtain the priority information of the user terminal from the HSS through the SCSCF entity device.
- Step 202 Bind the priority information to the terminal information of the second user terminal.
- Step 2: 03 after receiving the session request initiated by the second user terminal, the PCSCF entity device carries the first request according to the session request.
- the terminal information of the second user terminal searching for priority information of the second user terminal that is bound;
- Step 204 Compare the priority of the second user terminal with the priority of the first user terminal, and when the priority of the second user terminal is higher, request the bearer device to reserve the bandwidth resource for the second user terminal. ;
- Step 2 05 If the bandwidth resource is insufficient, the session of the first user terminal is selected to be removed, and the bandwidth resource is released.
- Step 206 Allocate bandwidth resources to the second user terminal, and establish a session. The following describes the specific signaling process, as shown in Figure 3:
- a user terminal to a bearer device such as a gateway GPRS support node (Gateway GPRS
- GGSN Packet Data Protocol (PDP) context activation.
- PDP Packet Data Protocol
- the PCSCF entity device initiates a registration request to the SCSCF entity device.
- the SCSCF entity device allocates a request to the HSS originating server (Server Assignment)
- SAR SAR Request
- the HSS searches for the corresponding subscription data of the user, and returns a server to the SCSCF entity device (Server Assignment Answer, SAA), which carries the priority information of the user terminal.
- SAA Server Assignment Answer
- the original user model can be extended, as shown in FIG. 4, which is an extended user model, in which a "Priority (UserPriority): numeric type” data item is added to indicate the priority of the user. level.
- the value range of this priority can be preset in the manner shown in Table 1.
- the specific extensible markup language (XML) code when the HSS returns the SAA is also A corresponding change will occur. For example, as follows:
- the extension information of the slash part indicates that the priority of the SAA returned by the HSS is "2", which means that the user is a high priority user.
- the PCSCF entity device acquires priority information from the registration response, and binds the priority information to the terminal information of the user terminal.
- the PCSCF entity device replies to the priority user terminal with a registration confirmation (REGISTER 200) indicating that the registration is completed.
- a first user terminal has established a session with the network and occupies bandwidth resources.
- the emergency commander or the like as a high-priority user requests the access network through the second user terminal, wherein the first user terminal and the second user
- the terminal has been registered through the signaling process of (1-1) ⁇ (1-8) above, which The corresponding priority information has been pre-stored in the PCSCF entity device, as shown in FIG. 5, and the following signaling process is specifically implemented:
- the second user terminal initiates a session request (INVITE) to the PCSCF entity device.
- the session request of the second user terminal is rejected.
- the SCSCF entity device further forwards the session request carrying the priority information of the second user terminal to the called network.
- the called network replies to the SCSCF entity device with a Session Description Protocol (SDP) message as a response message.
- SDP Session Description Protocol
- the SCSCF entity device forwards the above SDP message to the PCSCF entity device.
- the PCSCF entity device requests a reserved bandwidth resource from the bearer device according to the result of the media capability negotiation of the terminal (1-11) to (1-12), and the response of the GGSN indicates the bearer device. Insufficient bandwidth.
- the session of the first user terminal is selected by the PCSCF entity device to be removed, and the bandwidth resource is released.
- the first user terminal described in this embodiment does not necessarily have only one user terminal, but may also be multiple user terminals.
- the PCSCF entity device may be locally In the existing session, according to the preset selection policy, the session with the priority lower than the priority of the second user terminal is selected for removal.
- the selected policy may consider the requirement for the bandwidth resource when the second user terminal with a high priority is established to establish a session, and the specific policy may refer to The following information:
- the session with a priority of "Medium” and a session with a priority of "Low” is preferred.
- the PCSCF entity device may also reply to the second user terminal with a retransmission indication message, such as 488. No. message, to instruct the second user terminal to re-initiate the session request with a smaller bandwidth, and then return to perform the above steps (1-10).
- a retransmission indication message such as 488. No. message
- the PCSCF entity device sends a Session Disassembly Message (BYE) to the SCSCF entity device to indicate that its selected session has been removed.
- BYE Session Disassembly Message
- the PCSCF entity device may further send a playback indication message to the SCSCF entity device, and carry a reason header field for indicating the SCSCF entity device or an related application server (referred to as: AS)
- AS an application server
- the PCSCF entity device sends a session teardown message (BYE) to the corresponding first user terminal of the selected session to tear down the ongoing session of the user terminal.
- BYE session teardown message
- the PCSCF entity device may temporarily reject the session request of other low priority user terminals to prevent the released resources from being re-occupied.
- the calling side user terminal communicates with the called side user terminal located on the called network.
- the bandwidth of the called side user terminal may also be reserved according to the above method. Resources.
- the PCSCF entity device sends a 183 response message carrying the SDP message to the second user terminal, indicating that the session has been established.
- the user terminal having the higher priority can preempt the bandwidth resource and forcibly access the network from the low priority user terminal that has established the session.
- Establishing a session so that in an emergency such as an earthquake or a fire, priority is given to meeting the needs of certain users with special needs to establish a session, thereby avoiding the rejection of session requests due to flow control or insufficient resources, and raising these high priorities.
- the success rate of the user of the level user also improves the ability of emergency handling.
- This embodiment provides another network priority control method.
- a user terminal having a high priority has not initiated a session request.
- the method includes the following steps:
- Step 301 After receiving the registration request from the user terminal, the PCSCF entity device acquires the priority information of the user terminal from the HSS. Further, the PCSCF entity device may obtain the priority information of the user terminal from the HSS by using the SCSCF entity device.
- Step 302 Bind the priority information to the terminal information of the user terminal.
- Step 303 Before receiving the session request initiated by the user terminal with high priority, the PCSCF entity device sends the device to the bearer device. Request to reserve bandwidth resources for the user terminal with high priority.
- Step 304 If the bandwidth resource of the bearer device is insufficient, the session of the established user terminal is selected to be removed, and the bandwidth resource is released.
- Step 305 After releasing sufficient bandwidth resources, end the user with high priority The end allocates bandwidth resources.
- the registration process is the same as (1-1) to (1-8) in the second embodiment of the foregoing method, and details are not described herein again.
- the following signaling process may also be included:
- the PCSCF entity device requests the bearer device to reserve the bandwidth resource. If the bandwidth resource meets the session requirement of the high-priority user terminal, the bearer device directly reserves the bandwidth resource for the high-priority user terminal. Otherwise, if the bandwidth resources of the bearer device are insufficient, proceed to step (2-10).
- the PCSCF entity device sends a Session Disassembly Message (BYE) to the SCSCF entity device to tear down its selected session.
- BYE Session Disassembly Message
- the method described in this embodiment directly reserves the bandwidth required for the session for the high-priority user terminal before the user terminal initiates the session request, even if the low-priority user terminal requests the establishment of the session before the high-priority user terminal, It will occupy the reserved bandwidth resources. Therefore, it is not necessary to preempt the bandwidth resources, which can effectively ensure the high-priority user terminals with special needs to establish sessions, and further improve the emergency processing capability.
- This embodiment provides an IP multimedia subsystem, as shown in FIG. 8, including a PCSCF entity device 10 and an HSS 20. Its working principle is as follows:
- the PCSCF entity device 10 is configured to: after receiving the registration request from the user terminal, obtain the priority information of the user terminal from the HSS20; the HSS20 is configured to search for the priority of the corresponding user terminal according to the request of the PCSCF entity device.
- the level information is sent to the PCSCF entity device 10; the PCSCF entity device 10 binds the priority information to the terminal information of the user terminal; searches for the binding priority information according to the terminal information of the user terminal, and according to the Priority information, which reserves bandwidth resources for user terminals with high priority. Further, the PCSCF entity device 10 can pass The SCSCF entity device acquires priority information of the user terminal from the HSS 20.
- the PCSCF entity device 10 specifically includes an obtaining module 11, a binding module 12, and a resource management module 13. Its working principle is as follows:
- the obtaining module 11 in the PCSCF entity device 10 receives the registration request from the user terminal, and acquires the priority information of the user terminal from the HSS 20; the HSS 20 searches for the priority information of the corresponding user terminal according to the request of the PCSCF entity device 10, and sends the priority information to the corresponding user terminal.
- the binding module 12 of the PCSCF entity device 10 binds the priority information acquired by the obtaining module 11 to the terminal information of the user terminal; the resource management module 13 searches for the binding according to the terminal information.
- the priority information bound by the module 12 is fixed, and the bandwidth resource is reserved for the user terminal with high priority.
- the obtaining module 1 1 can obtain the priority information of the user terminal from the HS S 20 through the SCSCF entity device after receiving the registration request from the user terminal.
- the PCSCF entity device can obtain the priority information of the user terminal. Therefore, when the bandwidth resource is occupied in a large amount and cannot access the network, the PCSCF entity device can make the priority information according to the saved information.
- a user terminal with a higher priority preferentially accesses the network and establishes a session, so that in an emergency such as an earthquake or a fire, priority is given to meeting the needs of certain users with special needs to establish a session, thereby avoiding flow control or insufficient resources. The reason is that the session request is rejected, which improves the success rate of these high-priority users and improves the emergency processing capability.
- This embodiment provides another IP multimedia subsystem whose basic structure is substantially the same as that of the system shown in FIG.
- the first user terminal has established a session in the network, and accordingly, as shown in FIG. 9, the resource management module 13 specifically includes a searching unit 1 31 1 , a comparison unit 1 312, and a first The request unit 1 31 3, the first session removal unit 1 314 and the first resource allocation unit 1 315.
- the resource management module 1 3 works as follows:
- the search unit 1 31 1 searches according to the terminal information of the second user terminal carried in the session request.
- the first session removal unit 1314 when the first request unit 1313 requests to reserve the bandwidth resource, if the bandwidth resource is insufficient, the session of the first user terminal is selected to be removed, and the bandwidth resource is released.
- the first resource allocation unit 1315 allocates a bandwidth resource to the second user terminal after the first session teardown unit 1314 releases the bandwidth resource, and establishes a session.
- the user terminal having the higher priority can preempt the bandwidth resource from the low-priority user terminal that has established the session, and forcibly connect Into the network, establish a session, so that in an emergency such as an earthquake or a fire, priority is given to meeting the needs of certain users with special needs to establish a session, and the session request is rejected due to reasons such as flow control or insufficient resources, and these are improved.
- the success rate of high-priority users also improves the ability of emergency handling.
- This embodiment provides another IP multimedia subsystem whose basic structure is similar to that of the system shown in FIG.
- the user terminal having the high priority has not initiated the session request, and accordingly, as shown in FIG. 10, the resource management module 13 specifically includes: a second request unit 1321, a second session removal unit 1322, and a Two resource allocation unit 1323. How the resource management module 13 works:
- the second request unit 1321 moves to the bearer device before the PCSCF entity device 10 receives the session request initiated by the user terminal having the high priority. Requesting to reserve bandwidth resources for the user terminal with high priority; when the second request unit 1321 requests to reserve bandwidth resources, if the bandwidth resource If the source is insufficient, the second session teardown unit 1 322 selects the session of the established user terminal to be removed, and the bandwidth resource is released. For the specific selection policy, refer to the foregoing method embodiments, and details are not described herein. After the second session teardown unit 1 322 releases the bandwidth resource, the bandwidth resource is allocated to the user terminal with high priority.
- the device and the system in this embodiment directly reserve the bandwidth required for the session for the high-priority user terminal before the user terminal initiates the session request, even if the low-priority user terminal requests the establishment of the session before the high-priority user terminal. It does not occupy the reserved bandwidth resources. Therefore, it is not necessary to preempt the bandwidth resources, which can effectively ensure the high-priority user terminals with special needs to establish sessions, and further improve the emergency processing capability.
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Description
网络优先级控制方法、 装置及*** 技术领域
本发明涉及一种网络优先级控制方法、 装置及***, 属于网络通信技术。 背景技术
在现有的 IP多媒体子***(IP Multimedia Subsystem, IMS)网络中, 对 于优先级的控制主要是通过资源优先级头域(Resource-Priority Header, 简 称: RPH)和接受的资源优先级头域(Accept-Resource-Priority Header,简 称: ARPH)来定义 IMS网络中的高优先级业务, 由核心网信任终端携带预先定 义的资源优先级, 以实现对相应业务的优先级处理。
但是, 釆用这种方法仅是针对不同业务的优先级进行的, 而不能针对用 户进行优先级管理; 并且, 上述 RPH和 ARPH信息均是由终端指定的, 缺乏较 高的可信度;而且优先级策略只在会话发起协议(Session Initial Protocol, 简称: SIP)终端和 SIP服务器两端进行处理, 因此, 当紧急情况发生时, 不 能保证高优先级用户的优先接入。 例如, 在地震或火灾等灾难场景中会出现 大量的试呼请求, 从而引发核心网流量控制, 当出现高负载流控时, 无法保 障特殊人员, 如抗灾指挥部的接续成功率。 发明内容
本发明提供了一种网络优先级控制方法、 装置及***, 能够在 IMS***中 明确用户的优先级, 从而能够优先保证高优先级用户的会话接续。
为了实现上述目的, 本发明的一个实施例提供了一种网络优先级控制 方法, 其中包括:
接收到来自于用户终端的注册请求后, 从归属用户服务器(Home
Subscriber Server, 简称: HSS)获取该用户终端的优先级信息;
将该优先级信息与所述用户终端的终端信息相绑定;
根据所述用户终端的终端信息查找相绑定的优先级信息, 并根据该优先 级信息为具有高优先级的用户终端预留带宽资源。
为了实现上述目的,本发明的另一个实施例提供了一种 PCSCF实体装置, 其中包括:
获取模块, 用于接收到来自于用户终端的注册请求后,从 HSS获取该用户 终端的优先级信息;
绑定模块, 用于将获取模块获取的优先级信息与所述用户终端的终端 信息相绑定;
资源管理模块, 用于根据所述终端信息查找由绑定模块绑定的所述优 先级信息, 为具有高优先级的用户终端预留带宽资源。
为了实现上述目的, 本发明的又一个实施例提供了一种 I P 多媒体子 ***, 其中包括:
PCSCF 实体装置, 用于当接收到来自于用户终端的注册请求后, 从 HS S 获取该用户终端的优先级信息; 将该优先级信息与所述用户终端的终端信 息相绑定; 根据所述用户终端的终端信息查找相绑定的优先级信息, 并根 据该优先级信息为具有高优先级的用户终端预留带宽资源;
HSS , 用于根据所述 PCSCF实体装置的请求, 查找相应的用户终端的优先 级信息发送给所述 PCSCF实体装置。
通过本发明的实施例, PCSCF实体装置可以获得用户终端的优先级信息, 因此, 当带宽资源被大量占用而无法接入网络时, PCSCF 实体装置可以根据 其获得的优先级信息, 使具有较高优先级的用户终端优先接入网络, 建立会 话, 从而能够在地震或火灾等紧急情况下, 优先满足某些有特殊需求的用户 建立会话的需求,避免了因流量控制或资源不足等原因导致会话请求被拒绝, 提高了这些高优先级用户的接续成功率, 也相应提高了应急处理的能力。
下面通过附图和实施例, 对本发明的技术方案做进一步的详细描述。
附图说明
图 1为本发明方法实施例一所述网络优先级控制方法的流程图; 图 2为本发明方法实施例二所述网络优先级控制方法的流程图; 图 3为本发明方法实施例二所述网络优先级控制方法中注册过程的信令 流程图;
图 4为本发明方法实施例二所述扩展后的用户模型的数据结构示意图; 图 5为本发明方法实施例二所述网络优先级控制方法中资源抢占过程的 信令流程图;
图 6为本发明方法实施例三所述网络优先级控制方法的流程图; 图 7为本发明方法实施例三所述网络优先级控制方法中资源预留过程的 信令流程图;
图 8为本发明装置及***实施例一所述 IP多媒体子***的结构示意图; 图 9为本发明装置及***实施例二所述 IP多媒体子***中资源管理模块 13的结构示意图;
图 10为本发明装置及***实施例三所述 IP多媒体子***中资源管理模 块 13的结构示意图。 具体实施方式
方法实施例一
本实施例提供了一种网络优先级控制方法, 如图 1所示, 包括如下步骤: 步骤 101,接收到来自于用户终端的注册请求后,从归属用户服务器(Home Subscriber Server, 简称: HSS)获取该用户终端的优先级信息;
具体地, 可以由代理呼叫会话控制功能(Proxy-Call Session Control Function, 简称: PCSCF)实体装置或接入网关控制功能(Acces s Gateway Control Function, 简称: AGCF)实体装置通过服务呼叫会话控制功能
(Serving-Call Session Control Function, 简称: SCSCF)实体装置从 HSS 获取该用户终端的优先级信息。 PCSCF实体装置或 AGCF实体装置, 本申请 中统称为 PCSCF实体装置。
尽管 PCSCF和 SCSCF称为实体装置, 但具体实现的时候可作为设备中的 —部分逻辑。
步骤 102, 将该优先级信息与所述用户终端的终端信息相绑定; 其中, 终端信息可以为用户终端的标识信息或接入信息, 标识信息可以为 IP多媒 体公有标识(IP Multimedia Public Identity, 简称: IMPU) , 接入信息 可以为该用户接入时所用的 I Ρ地址;
步骤 103, 根据所述用户终端的终端信息查找相绑定的优先级信息, 并根据该优先级信息为具有高优先级的用户终端预留带宽资源。
具体地, 可以在接收到该具有高优先级的用户终端发起的会话请求之 前预留带宽资源; 也可以在接收到该具有高优先级的用户终端发起的会话 请求之后, 从已经建立会话的用户终端抢占带宽资源, 预留给该高优先级 的用户终端。
现有技术中优先级策略只在 SIP终端和 SIP服务器两端进行处理, IMS 网络中的 PCSCF实体装置和 SCSCF实体装置均不对 RPH和 ARPH信息进行处理, 因此, 中间路径处理该信息的行为未确定, 承载设备根据优先级预留足够资 源和带宽的行为也无法确定。 而且由于 PCSCF实体装置是 IMS网络中面临流 量冲击的第一个实体装置, 其中并不包含用户数据, 因此, 当紧急情况发生 时, 不能保证高优先级用户的优先接入。 并且如果强行在 PCSCF设置用户的 优先级数据, 根据接入网络类型或 IP地址范围配置设备级的优先级定义, 则 需要 PCSCF实体装置预先得知哪种网络或哪些网段的 IP地址需要定义高优先 级, 因此, 实施的可行性不高。 因此, 通过本实施例所述方法, PCSCF 实体 装置或 AGCF实体装置可以获得用户终端的优先级信息, 因此, 当带宽资源被 大量占用而无法接入网络时, 可以根据其获得的优先级信息, 使具有较高优
先级的用户终端优先接入网络, 建立会话, 从而能够在地震或火灾等紧急情 况下, 优先满足某些有特殊需求的用户建立会话的需求, 避免了因流量控制 或资源不足等原因导致会话请求被拒绝, 提高了这些高优先级用户的接续成 功率, 也相应提高了应急处理的能力。
另外需要说明的是, 所述用户终端在网络上注销成功时, 即 PCSCF实体 装置接收到网络侧发出的注销成功响应 (REG I STER 2000K ) 消息时, 可以删 除本地保存的用户数据, 其中包含所述用户终端的优先级信息。 以便当再次 收到用户终端的注册请求后, 重新从 HSS获取该用户终端的优先级信息。
方法实施例二
本实施例提供了另一种网络优先级控制方法, 在本实施例中, 存在第一 用户终端已经在网络中建立了会话, 并且 PCSCF实体装置获得了第一用户终 端在注册过程中从 HSS获取的第一用户终端的优先级信息。 如图 2所示, 包 括如下步骤:
步骤 201 , PCSCF实体装置接收到来自于第二用户终端的注册请求后, 从 HSS获取该用户终端的优先级信息;
进一步地, PCSCF实体装置可以通过 SCSCF实体装置从 HSS获取该用户终 端的优先级信息。
步骤 202 , 将该优先级信息与所述第二用户终端的终端信息相绑定; 步骤 2 03 , PCSCF实体装置接收到由第二用户终端发起的会话请求后, 根据该会话请求中携带的第二用户终端的终端信息, 查找相绑定的第二用 户终端的优先级信息;
步骤 204 , 将第二用户终端的优先级与所述第一用户终端的优先级进 行比较, 当第二用户终端的优先级更高时, 向承载设备请求为该第二用户 终端预留带宽资源;
步骤 2 05 , 如果带宽资源不足, 则选择第一用户终端的会话进行拆除, 释放带宽资源;
步骤 206, 为所述第二用户终端分配带宽资源, 建立会话。 以下通过具体的信令流程进行说明, 如图 3所示:
( 1-1 ) 某一用户终端到承载设备, 如网关 GPRS支撑节点(Gateway GPRS
Supporting Node, 简称: GGSN)进行分组数据协议(Packet Data Protocol, 简称: PDP)上下文激活。
(1-2)上述用户终端向 PCSCF实体装置发起注册请求(REGISTERS
( 1-3 ) PCSCF实体装置向 SCSCF实体装置发起注册请求。
(1-4) SCSCF实体装置向 HSS发起服务器分配请求(Server Assignment
Request, 简称: SAR)。
( 1-5 ) HSS查找该用户相应的签约数据, 并向 SCSCF实体装置返回服务 器分西己口向应(Server Assignment Answer, 简称: SAA) , 其中携带有该用户终 端的优先级信息。
具体地, 可以对原有的用户模型进行扩展, 如图 4所示, 为扩展后的用 户模型, 其中增加了 "优先级(UserPriority): 数值型" 的数据项, 用于表 明该用户的优先级。 该优先级的取值范围可以釆用如表 1所示方式进行预先 设定。
表 1
相应地,在用户模型中增加了表示优先级的数据项后, HSS返回 SAA时的 具体的可扩展标记语言 ( extensible Markup Language, 简称: XML )代码也
会发生相应变化。 例如, 如下所示:
<?xml version="l.0" encoding="UTF-8 " ?>
<IMSSubscription>
<Pr ivateID>im i OOlShomel. com</Pr ivateID>
<ServiceProf i le>
<PublicIdentity>
<Barr inglndi cat ion>0</Bar ring Indi cat ion>
<UserPr ior i ty>2</UserPr ior i ty>
<Ident i ty>s ip: impuOOlShomel. com</Identity> </PublicIdentity>
</ServiceProf i le>
</IMSSubscription> 其中,划线部分的扩展信息即表明 HSS返回的 SAA中携带的优先级为" 2", 即表示该用户为高优先级用户。
(1-6) SCSCF实体装置从 SAA中获取优先级信息, 并将该优先级信息携带 中用扩展头域 "P-UserPriority=Hi" 表示此用户具有网络授权的高优先级。
(1-7) PCSCF实体装置从注册应答中获取优先级信息, 将该优先级信息 与该用户终端的终端信息相绑定。
( 1-8 ) PCSCF实体装置向优先级用户终端回复注册确认(REGISTER 200) , 表明注册完成。
假设, 已经有第一用户终端与网络建立了会话, 占用了带宽资源。 此时, 在一些特殊情况下, 例如, 火灾或地震等灾难发生时, 应急指挥人员等作为 高优先级用户, 通过第二用户终端也请求接入网络, 其中的第一用户终端和 第二用户终端已经通过前述( 1-1 ) ~ ( 1-8 ) 的信令过程进行了注册, 其
相应的优先级信息已经预先保存于 PCSCF实体装置中,如图 5所示, 此时具体 执行如下信令过程:
( 1-9 )第二用户终端向 PCSCF实体装置发起会话请求(INVITE)。
( 1-10 ) PCSCF实体装置根据该会话请求中携带的第二用户终端的接 入信息或标识信息, 查找第二用户终端的优先级信息, 将第二用户终端的 优先级与第一用户终端的优先级进行比较, 当第二用户终端的优先级更高 时, 将查找的第二用户终端的优先级信息, 例如 "P-UserPr ior i ty=Hi " , 携带于上述会话请求中, 前转给 SCSCF实体装置, 以表明该会话请求要优先 处理。
否则, 如果第二用户终端的优先级不比第一用户终端的优先级高, 且当 前已经没有足够的带宽资源可供分配时, 则拒绝第二用户终端的会话请求。
( 1-11 ) SCSCF实体装置将携带有第二用户终端的优先级信息的会话请求 进一步前转给被叫网络。
( 1-12 ) 被叫网络向 SCSCF实体装置回复会话描述协议(Ses s ion Des cr i pt ion Pro toco l , 简称: SDP)消息, 作为应答消息。
( 1-13 ) SCSCF实体装置将上述 SDP消息前转给 PCSCF实体装置。
( 1-14 )才艮据上述(1-11)至(1-12)所完成的终端的媒体能力协商的结果, PCSCF实体装置向承载设备请求预留带宽资源, GGSN回复的响应表明承载设备 带宽不足。
( 1-15 ) 由 PCSCF实体装置选择第一用户终端的会话进行拆除, 释放带 宽资源。
此处需要特别指出的是, 本实施例中所述的第一用户终端并不一定只有 一个用户终端, 也可能是多个用户终端, 在对会话进行拆除时, 可以由 PCSCF 实体装置在本地已存在的会话中, 按照预设的选择策略, 选择优先级低于 第二用户终端的优先级的会话进行拆除。 选择的策略可以考虑满足优先级 高的第二用户终端建立会话时, 对带宽资源的需求量, 具体策略可以参考
以下信息:
(a)优先级
例如, 在优先级为 "中" 的会话及优先级为 "低" 的会话中, 优先选 择优先级为 "低" 的会话;
(b)通话时长
例如, 优先选择通话时间已超过 3分钟的会话;
(c)占用带宽
例如, 优先选择所占带宽较大的会话, 从而有利于拆除较少的会话, 回收较多的带宽资源;
(d)通话的对端特征
例如, 优先选择涉及热线电话的会话;
另外, 为了尽量减小对已建立会话的影响, 提高为高优先级用户终端分 配带宽资源的成功率, 在本步骤中, PCSCF实体装置还可以向第二用户终端回 复重发指示消息, 如 488号消息, 以指示第二用户终端釆用更小的带宽重新发 起会话请求, 然后返回执行上述步骤(1-10) 。
( 1-1 6 ) PCSCF实体装置向 SCSCF实体装置发送会话拆除消息(BYE) , 以表明其所选择的会话被拆除。
另外, PCSCF实体装置还可以向 SCSCF实体装置发送放音指示消息, 携带 原因 (Rea son)头域, 用于指示 SCSCF实体装置或相关的应用服务器 (App l i ca t ion Server,简称: AS)向被拆除会话所对应的第一用户终端放音, 以提示拆话原因。
( 1 -1 7 ) PCSCF实体装置向被选择会话的相应的第一用户终端发送会 话拆除消息(BYE) , 以拆除该用户终端正在进行中的会话。
( 1-18 ) 为第二用户终端分配带宽资源, 建立会话。
在第二用户终端的会话尚未建立之前, PCSCF实体装置可以暂拒绝其他低 优先级用户终端的会话请求, 以避免已释放的资源被重新占用。会话建立后,
主叫侧用户终端与位于被叫网络的被叫侧用户终端进行交互通信, 为了保证 对被叫侧用户终端的会话数据进行成功处理, 也可以根据上述方法为该被叫 侧用户终端预留带宽资源。
( 1 -19 ) GGSN与 PCSCF实体装置之间进行业务质量(Qua l i ty of Serv i ce,简称: QoS)认证 (Author i se) 。
( 1-20 ) PCSCF实体装置向第二用户终端发送携带 SDP消息的 183响应消 息, 表明会话已经建立。
通过本实施例所述方法, 当带宽资源被大量占用而无法接入网络时, 具 有较高优先级的用户终端可以从已经建立会话的低优先级用户终端处, 抢占 带宽资源, 强行接入网络, 建立会话, 从而能够在地震或火灾等紧急情况下, 优先满足某些有特殊需求的用户建立会话的需求, 避免了因流量控制或资源 不足等原因导致会话请求被拒绝, 提高了这些高优先级用户的接续成功率, 也相应提高了应急处理的能力。
方法实施例三
本实施例提供了另一种网络优先级控制方法, 在本实施例中, 具有高优 先级的用户终端尚未发起会话请求, 如图 6所示, 包括如下步骤:
步骤 301 , PCSCF实体装置接收到来自于用户终端的注册请求后, 从 HSS 获取该用户终端的优先级信息; 进一步地, PCSCF 实体装置可以通过 SCSCF 实体装置从 HSS获取该用户终端的优先级信息。
步骤 302 , 将该优先级信息与所述用户终端的终端信息相绑定; 步骤 303 , 在接收到由所述具有高优先级的用户终端发起的会话请求 之前, 所述 PCSCF实体装置向承载设备请求为该具有高优先级的用户终端 预留带宽资源。
步骤 304 , 如果所述承载设备的带宽资源不足, 则选择已建立的用户 终端的会话进行拆除, 释放带宽资源。
步骤 305 , 当释放了足够的带宽资源后, 为所述具有高优先级的用户终
端分配带宽资源。
以下通过具体的信令流程进行说明, 其中的注册过程与上述方法实施例 二中的(1-1) ~ (1-8)相同, 此处不再赘述。 另外, 高优先用级户终端完成注 册后, 在发起会话请求之前, 如图 7所示, 还可以包括如下信令流程:
( 2-9 ) PCSCF实体装置向承载设备请求预留带宽资源, 如果此时的带宽 资源能够满足上述高优先级用户终端的会话需求, 则承载设备直接为该高优 先级用户终端预留带宽资源; 否则, 如果承载设备的带宽资源不足; 则继续 执行步骤(2-10) 。
(2-1 0)选择已建立的用户终端的会话进行拆除, 释放带宽资源。 具体的 选择策略可以参考方法实施例二的内容, 此处不再赘述。
( 2-1 1 ) PCSCF实体装置向 SCSCF实体装置发送会话拆除消息(BYE) , 以拆除其所选择的会话。
通过本实施例所述方法, 在用户终端发起会话请求之前便为高优先级用 户终端直接预留了会话所需带宽, 即使低优先级用户终端先于高优先级用户 终端请求建立会话, 也不会占用预留的带宽资源, 因此, 无需抢占带宽资源, 即可以有效地保证有特殊需求的高优先级用户终端建立会话的需求, 进一步 提高了应急处理的能力。
***及装置实施例一
本实施例提供了一种 I P多媒体子***, 如图 8所示, 包括 PCSCF实体装 置 10和 HSS20。 其工作原理具体如下:
PCSCF实体装置 10 ,用于当接收到来自于用户终端的注册请求后,从 HSS20 获取该用户终端的优先级信息; HSS20 ,用于根据所述 PCSCF实体装置的请求, 查找相应的用户终端的优先级信息发送给所述 PCSCF实体装置 10; PCSCF实体 装置 10将该优先级信息与所述用户终端的终端信息相绑定; 根据用户终端 的终端信息查找相绑定的优先级信息, 并根据该优先级信息, 为具有高优 先级的用户终端预留带宽资源。 进一步地, PCSCF实体装置 1 0可以通过
S C S C F实体装置从 H S S 20获取该用户终端的优先级信息。
其中, PCSCF实体装置 10具体包括获取模块 11、 绑定模块 1 2和资源管 理模块 1 3。 其工作原理如下:
PCSCF实体装置 10中的获取模块 11接收来自于用户终端的注册请求, 从 HSS 20获取该用户终端的优先级信息; HSS20根据 PCSCF实体装置 10的请求, 查找相应的用户终端的优先级信息发送给该 PCSCF实体装置 10; PCSCF实体装 置 10的绑定模块 12将获取模块 11获取的优先级信息与所述用户终端的终端 信息相绑定; 资源管理模块 1 3根据所述终端信息, 查找由绑定模块 1 2绑定 的所述优先级信息, 并为具有高优先级的用户终端预留带宽资源。
此处需要说明的是: 获取模块 1 1接收来自于用户终端的注册请求后, 可 以通过 SCSCF实体装置从 HS S 20获取该用户终端的优先级信息。
通过本实施例所述装置及***, PCSCF 实体装置可以获得用户终端的优 先级信息, 因此, 当带宽资源被大量占用而无法接入网络时, PCSCF 实体装 置可以根据其保存的优先级信息, 使具有较高优先级的用户终端优先接入网 络, 建立会话, 从而能够在地震或火灾等紧急情况下, 优先满足某些有特殊 需求的用户建立会话的需求, 避免了因流量控制或资源不足等原因导致会话 请求被拒绝, 提高了这些高优先级用户的接续成功率, 也相应提高了应急处 理的能力。
***及装置实施例二
本实施例提供了另一种 IP多媒体子***, 其基本结构与图 8 所示系 统大致相同。 但在本实施例中, 存在第一用户终端已经在网络中建立了会 话, 因此相应地, 如图 9所示, 资源管理模块 1 3具体包括查找单元 1 31 1、 比较单元 1 312、 第一请求单元 1 31 3、 第一会话拆除单元 1 314及第一资源 分配单元 1 315。 资源管理模块 1 3的工作原理如下:
当 PCSCF实体装置 1 0接收到由第二用户终端发起的会话请求后, 由 查找单元 1 31 1 根据该会话请求中携带的第二用户终端的终端信息, 查找
由绑定模块 12绑定的第二用户终端的优先级信息; 比较单元 1312根据查 找单元 1311 查找到的所述优先级信息, 将第二用户终端的优先级与第一 用户终端的优先级进行比较; 第一请求单元 1313根据比较单元 1312的比 较结果, 当第二用户终端的优先级更高时, 向承载设备请求为该第二用户 终端预留带宽资源, 其中的承载设备具体可以为 GGSN; 第一会话拆除单元 1314 当第一请求单元 1313请求预留带宽资源时, 如果带宽资源不足, 则 选择第一用户终端的会话进行拆除, 释放带宽资源, 具体的选择策略可参见 前述各方法实施例, 此处不再赘述; 第一资源分配单元 1315在第一会话拆 除单元 1314释放带宽资源后, 为所述第二用户终端分配带宽资源, 建立会 话。
通过本实施例所述装置及***, 当带宽资源被大量占用而无法接入网络 时,具有较高优先级的用户终端可以从已经建立会话的低优先级用户终端处, 抢占带宽资源, 强行接入网络, 建立会话, 从而能够在地震或火灾等紧急情 况下, 优先满足某些有特殊需求的用户建立会话的需求, 避免了因流量控制 或资源不足等原因导致会话请求被拒绝, 提高了这些高优先级用户的接续成 功率, 也相应提高了应急处理的能力。
***及装置实施例三
本实施例提供了另一种 IP多媒体子***,其基本结构与图 8所示***类 似。 但在本实施例中, 具有高优先级的用户终端尚未发起会话请求, 因此相 应地, 如图 10所示, 资源管理模块 13具体包括: 第二请求单元 1321、 第二 会话拆除单元 1322及第二资源分配单元 1323。 资源管理模块 13的工作原理 下:
在绑定模块 12 将优先级信息与用户终端的终端信息相绑定后, 在 PCSCF 实体装置 10接收到由具有高优先级的用户终端发起的会话请求之 前, 由第二请求单元 1321 向承载设备请求为该具有高优先级的用户终端 预留带宽资源; 当第二请求单元 1321 请求预留带宽资源时, 如果带宽资
源不足, 则由第二会话拆除单元 1 322选择已建立的用户终端的会话进行拆 除, 释放带宽资源, 具体的选择策略可参见上述各方法实施例, 此处不再赘 述; 第二资源分配单元 1 32 3在第二会话拆除单元 1 322释放带宽资源后, 为所述具有高优先级的用户终端分配带宽资源。
通过本实施例所述装置和***, 在用户终端发起会话请求之前便为高优 先级用户终端直接预留了会话所需带宽, 即使低优先级用户终端先于高优先 级用户终端请求建立会话, 也不会占用预留的带宽资源, 因此, 无需抢占带 宽资源,即可以有效地保证有特殊需求的高优先级用户终端建立会话的需求, 进一步提高了应急处理的能力。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修 改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims
1、 一种网络优先级控制方法, 其特征在于包括:
接收到来自于用户终端的注册请求后, 从归属用户服务器 HSS获取该用 户终端的优先级信息;
将该优先级信息与所述用户终端的终端信息相绑定;
根据所述用户终端的终端信息查找相绑定的优先级信息, 并根据该优 先级信息为具有高优先级的用户终端预留带宽资源。
2、 根据权利要求 1 所述的网络优先级控制方法, 其特征在于第一用 户终端已经在所述网络中建立了会话 ,所述根据该优先级信息为具有高优先 级的用户终端预留带宽资源包括:
接收到由第二用户终端发起的会话请求后, 根据该会话请求中携带的 第二用户终端的终端信息, 查找相绑定的第二用户终端的优先级信息; 根据所述优先级信息, 将第二用户终端的优先级与所述第一用户终端 的优先级进行比较, 当第二用户终端的优先级更高时, 向承载设备请求为 该第二用户终端预留带宽资源;
如果所述带宽资源不足, 则选择第一用户终端的会话进行拆除,释放带 宽资源;
为所述第二用户终端分配带宽资源, 建立会话。
3、 根据权利要求 2所述的网络优先级控制方法, 其特征在于所述第 一用户终端为多个用户终端, 所述选择第一用户终端的会话进行拆除包括: 根据所述第一用户终端的优先级、 通话时长、 占用带宽或通话的对端 特征选择相应用户终端的会话进行拆除。
4、 根据权利要求 2所述的网络优先级控制方法, 其特征在于接收到 由第二用户终端发起的会话请求之后还包括:
向所述第二用户终端回复重发指示消息, 用于指示所述第二用户终端 釆用更小的带宽重新发起会话请求。
5、 根据权利要求 2所述的网络优先级控制方法, 其特征在于所述选 择第一用户终端的会话进行拆除之后还包括:
向服务呼叫会话控制功能 SCSCF实体装置发送携带有原因头域的放音 指示消息, 用于指示所述 SCSCF实体装置向被拆除会话所对应的第一用户 终端放音, 以提示拆话原因。
6、 根据权利要求 1所述的网络优先级控制方法, 其特征在于所述根 据该优先级信息为具有高优先级的用户终端预留带宽资源包括:
在接收到由所述具有高优先级的用户终端发起的会话请求之前, 向承 载设备请求为该具有高优先级的用户终端预留带宽资源。
7、 根据权利要求 6所述的网络优先级控制方法, 其特征在于向承载 设备请求为该具有高优先级的用户终端预留带宽资源包括:
如果所述承载设备的带宽资源不足, 则选择已建立的用户终端的会话 进行拆除, 释放带宽资源;
为所述具有高优先级的用户终端分配带宽资源。
8、 根据权利要求 1 ~ 7中任一所述的网络优先级控制方法,其特征在 于所述终端信息包括: 所述用户终端的标识信息或接入信息。
9、 一种代理呼叫会话控制功能 PCSCF实体装置, 其特征在于包括: 获取模块, 用于接收到来自于用户终端的注册请求后, 从归属用户服务 器 HSS获取该用户终端的优先级信息;
绑定模块, 用于将获取模块获取的优先级信息与所述用户终端的终端 信息相绑定;
资源管理模块, 用于根据所述终端信息查找由绑定模块绑定的所述优 先级信息, 为具有高优先级的用户终端预留带宽资源。
1 0、 根据权利要求 9所述的 PCSCF实体装置,其特征在于当第一用户终 端已经建立有会话时, 所述资源管理模块包括:
查找单元, 用于当 PCSCF实体装置接收到由第二用户终端发起的会话 请求后, 根据该会话请求中携带的第二用户终端的终端信息, 查找由绑定
模块绑定的第二用户终端的优先级信息;
比较单元, 用于根据查找单元查找到的所述优先级信息, 将第二用户 终端的优先级与第一用户终端的优先级进行比较;
第一请求单元, 用于根据比较单元的比较结果, 当第二用户终端的优 先级更高时, 向承载设备请求为该第二用户终端预留带宽资源;
第一会话拆除单元, 用于当第一请求单元请求预留带宽资源时, 如果 带宽资源不足, 则选择第一用户终端的会话进行拆除, 释放带宽资源; 第一资源分配单元, 用于在第一会话拆除单元释放带宽资源后, 为所 述第二用户终端分配带宽资源, 建立会话。
1 1、 根据权利要求 10所述的 PCSCF实体装置, 其特征在于所述资源管 理模块包括:
第二请求单元, 用于在绑定模块将优先级信息与用户终端的终端信息 相绑定后, 在接收到由具有高优先级的用户终端发起的会话请求之前, 向 承载设备请求为该具有高优先级的用户终端预留带宽资源;
第二会话拆除单元, 用于当第二请求单元请求预留带宽资源时, 如果 带宽资源不足, 则选择已建立的用户终端的会话进行拆除, 释放带宽资源; 第二资源分配单元, 用于在第二会话拆除单元释放带宽资源后, 为所 述具有高优先级的用户终端分配带宽资源。
12、 一种 I P多媒体子***, 其特征在于包括:
代理呼叫会话控制功能 PCSCF实体装置, 用于当接收到来自于用户终端 的注册请求后,从归属用户服务器 HSS获取该用户终端的优先级信息; 将该 优先级信息与所述用户终端的终端信息相绑定; 根据所述用户终端的终端 信息查找相绑定的优先级信息, 并根据该优先级信息为具有高优先级的用 户终端预留带宽资源;
归属用户服务器 HSS , 用于根据所述 PCSCF实体装置的请求, 查找相应 的用户终端的优先级信息发送给所述 PCSCF实体装置。
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