CN101317389A - Method, system and equipment for user's access to network - Google Patents

Abstract

A method and system of accessing network for user. A user terminal (200) accesses the net element selectively which can satisfy the user service based on the attribute demand for the net element (302), thus the user service which the user terminal (200) requests could be normally provided, and implement the service normally. A user terminal equipment and a discovery equipment of proxy call session control function unit. With this equipment, the user can access the net element selectively which can satisfy the service capability requested by the user service, thus the service could be normally implemented.

Description

Method, system and the equipment of user access network

Method, system and the equipment technical field of user access network

The present invention relates to the business realizing technology in communication system, more particularly to a kind of user access network to carry out the method, system and equipment of business realizing.Background of invention

IP multimedia subsystem（IP Multimedia Subsystem, IMS) it is the 3rd generation partnership projects（3GPP) the subsystem of the support IP multimedia service proposed in version 5 (Release 5).IMS central characteristics are to use Session initiation Protocol（Session Initiation Protocol, SIP) with access independence.IMS is a multimedia control/Call- Control1 platform in packet domain, supports conversation class and non-session class multimedia service, and a general business platform is provided for following multimedia application.The specific definition of IMS network may be referred to 3GPP relevant criterions.

In the ims network, multiple business form can be provided.Urgency traffic therein refers to that there is provided the business promptly helped in the case where personal/public health and safety, life/property meet with danger.Communication network will provide the communication service of high priority for urgency traffic, and most suitable public safety joint point is routed the call to according to the positional information of call subscriber terminal and urgency traffic type（Public Safety Answering Point, PSAP), most suitable emergency call center is routed the call to by the PSAP（Emergency Call Center, ECC) processing, then provide help rapidly for seeking help person by the ECC.

In order to support urgency traffic in the ims network, agency of necessity's Session Control Unit is defined in the ims network（E-CSCF), the session control for urgency traffic, urgency traffic can be routed to suitable PSAP/ECC by E-CSCF.Fig. 1 is logic chart of the existing user terminal by IMS network insertions PSAP/ECC. Wherein, IP access networks（IP-CAN) it is physical path that user terminal has access to packet-based core networks, realizes the attachment of user terminal, IP address distribution and carry resource control function, IP-CAN also provides P-CSCF address information to user terminal.IP-CAN can be GPRS network（GPRS), WLAN（WLAN), asymmetric number loop wire（) or LAN ADSL（The network such as LAN).

P-CSCF receives the session signaling for carrying out user terminal, and be sent to packet-based core networks to act on behalf of Session Control Unit.P-CSCF can be located in visited network, can also be located in home network, when handling emergent operation request, and P-CSCF is used for the service conversation function of realizing the urgency traffic in this domain.

S-CSCF is serving session control unit, for being responsible for registration and conversation control function of the user terminal in packet-based core networks.

E-CSCF is emergent session control unit, and PSAP/ECC is routed to for handling user's emergent operation request, and by user's emergent operation request;E-CSCF is located at the visited network of user terminal under user's roaming condition, in this case, and user only has could access the E-CSCF of IMS network by the P-CSCF of visited network.

In above-mentioned network structure, in the case of roaming scenarios, the P-CSCF of access is likely located at visited network to user terminal, it is also possible to positioned at home network.

If P-CSCF is located at home network, by the requirement of its professional ability, when user terminal initiates urgency traffic, the emergent operation request will be routed to the P-CSCF of home network, and the P-CSCF of home network is unable to the correct route emergent operation request to the E-CSCF of visited network, this will cause emergent operation request to fail.Therefore, when user initiates urgency traffic, user terminal needs the P-CSCF for selecting to support urgency traffic ability, this P-CSCF to be located at visit domain and support E-CSCF selection.

In addition, except above-mentioned urgency traffic, it is other in the case of need to select the demand of the P-CSCF access networks with required professional ability there is also user.Such as, industry is merged in Telecommunications ＆ Networking Business and high-level network ten are done in view (Telecommunication and Internet converged Services and Protocols for Advanced Networking, TISPAN), resource management authorization subsystem（RACS) it is located in visited network, for the Service Quality Management of call session, P-CSCF can be by interacting, ensureing session service quality with RACS.If the P-CSCF of ownership place can not access the RACS on user visiting ground, session service quality will be unable to be guaranteed, therefore it is the RACS of access visited place, system may also require the demand for the accesses of the P-CSCF with session service quality control function that user passes through visited place.For another example, P-CSCF abilities when handling mobile terminal access and fixed terminal access are not consistent：If mobile subscriber is accessed using GPRS modes, it is necessary to which P-CSCF has and policy decision function（PDF the function of) interacting, and if user is accessed using fixed network, P-CSCF is needed with the function of being interacted with RACS, that is to say, that during access different types of terminals, P-CSCF abilities are needed also different.

Solution is not provided regarding to the issue above also in current standard, i.e., the problem of can not also solving ability needed for the P-CSCF of user's access can not meet user service in the prior art.The content of the invention

The embodiment of the present invention provides a kind of method of user access network so that user may be selected that meet user service needed for professional ability network element access.

The embodiment of the present invention provides a kind of system of user access network so that user may be selected that meet user service needed for professional ability network element access.

The embodiment of the present invention provides a kind of subscriber terminal equipment, using the subscriber terminal equipment cause user may be selected that meet user service needed for the network element of professional ability access.

The embodiment of the present invention provides one kind and acts on behalf of Session Control Unit discovering device, using the equipment cause user may be selected that meet user service needed for professional ability network element access.

The technical scheme of the embodiment of the present invention is as follows：

A kind of method of user access network, this method includes： User terminal is according to the attribute requirements for network element, the network element access of ability needed for selection disclosure satisfy that user service.

A kind of system of user access network, the system includes：User terminal and service network；The user terminal, for according to the attribute requirements for network element, the network element of ability to be accessed needed for selection disclosure satisfy that user service；

Service network, the network element of ability needed for for disclosure satisfy that user service for user terminal offer.

A kind of subscriber terminal equipment, including：Network element attribute demand receiving unit, network element selecting unit and network element registration unit；

The network element attribute demand receiving unit, for receiving the announcement information of service network transmission, and determines according to the announcement information or the business to be used the attribute requirements of network element, is sent to the network element selecting unit；

The network element selecting unit, for receiving the network element attribute demand information, initiate to carry the attach request of the network element attribute demand information to the service network, and by the service network return meet user service needed for the information of network element of ability be sent to the network element registration unit, or according to the network element attribute information obtained, the network element of ability needed for selection disclosure satisfy that user service, and the information of the network element is sent to the network element registration unit；

The network element registration unit, the network element for being obtained to the network element selecting unit initiates to register.One kind acts on behalf of Session Control Unit discovering device, including：User interface section, Data Management Unit and protocol processing unit；

The user interface section, P-CSCF for receiving and handling user terminal transmission has found request, P-CSCF attribute query message is sent to the protocol processing unit, and after the response message of the protocol processing unit is received, the P-CSCF for carrying available P-CSCF attribute informations to the user terminal loopback has found request response；

The Data Management Unit, for storing the P-CSCF attribute informations in network； The protocol processing unit, for receiving the P-CSCF attribute query message that the user interface section is sent, P-CSCF attribute information can be used by inquiring about the Data Management Unit acquisition, and generate carry it is described can use the query response message of P-CSCF attribute informations, return to the user interface section.

Therefore, in the technical scheme of the embodiment of the present invention, user terminal is according to the attribute requirements for network element, and selection disclosure satisfy that the network element access of user service, the user service required by user terminal thus can be normally realized, business is normally implemented.Brief Description Of Drawings

The exemplary embodiment of the present invention will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that in the above and other feature and advantage of the present invention, accompanying drawing：

Fig. 1 is the logic chart that existing user terminal accesses PSAP/ECC by IMS network；Fig. 2 is the system global structure figure of the user access network of the embodiment of the present invention；

Fig. 3 is the method overview flow chart of the user access network of the embodiment of the present invention；

Fig. 4 is the system construction drawing of user access network in the embodiment of the present invention one；

Fig. 5 is the concrete structure diagram of user terminal in the embodiment of the present invention one；

Fig. 6 is the structure chart of P-CSCF discovery devices in the embodiment of the present invention one；

Fig. 7 is the method flow diagram of user access network in the embodiment of the present invention one；

Fig. 8 is the system construction drawing of user access network in the embodiment of the present invention two；

Fig. 9 is the structure chart of user terminal in the embodiment of the present invention two；

Figure 10 is the structure chart of P-CSCF discovery devices in the embodiment of the present invention two；

Figure 11 is the method flow diagram of user access network in the embodiment of the present invention two；

Figure 12 is the system construction drawing of user access network in the embodiment of the present invention three；

Figure 13 is the concrete structure of user terminal in the embodiment of the present invention three and its annexation figure with DM servers； Figure 14 is the method flow diagram of user access network in the embodiment of the present invention three.Implement the mode of the present invention

For the purpose of the present invention, technological means and advantage is more clearly understood, is developed simultaneously embodiment below in conjunction with accompanying drawing, scheme of the present invention is described in further detail.

In embodiment of the present invention, user terminal is according to the attribute requirements for network element, the network element access of ability needed for selection disclosure satisfy that user service.

Fig. 2 is the system global structure figure of the user access network of the embodiment of the present invention.As shown in Fig. 2 the system includes：User terminal 200, the moon it is good business network 210.

Within the system, user terminal 200, for the attribute requirements according to network element, the network element access of ability needed for selection disclosure satisfy that user service；Service network 210, the network element of ability needed for for disclosure satisfy that user service for the offer of user terminal 200.

Fig. 3 is the method overview flow chart of the user access network of the embodiment of the present invention.As shown in figure 3, this method includes：

Step 301:User terminal 200 obtains the attribute requirements of network element.

Step 302:User terminal 200 is according to the attribute requirements of network element, the network element access of ability needed for selection disclosure satisfy that user service.

Therefore, in embodiments of the present invention, user terminal 200 is according to the attribute requirements of network element, the network element access of ability needed for selection disclosure satisfy that user service, and such user terminal 200 just can be by accessing this network element and then business needed for realizing user.

Below, it is urgency traffic, the ability as urgency traffic disposal ability using the service, exemplified by the network element is P-CSCF, specifically describes the implementation process of the present invention program.

Embodiment one：

In this embodiment it is assumed that user terminal is roamed, and access belonging network, i.e. user terminal have selected for the P-CSCF progress business processings of home network；The user terminal Visited network and home network are IMS network, and the IP CAN of visited network are GPRS network；The service request that user terminal is initiated is emergent operation request.

Fig. 4 is the system construction drawing of user access network in the embodiment of the present invention one.As shown in figure 4, the system includes：User terminal 400, home network 410 and visited network 420.Wherein, home network 410 specifically includes P-CSCF1 411 and S-CSCF 412;Visited network 420, which is specifically included, also includes P-CSCF discovery devices 600 in P-CSCF2 421 and IP CAN 422, IP CAN422.Compared with system shown in Figure 2, the materialization of the service network 310 in home network 410, visited network 420 as system shown in Figure 2 in the present embodiment.

User terminal 400 initiates emergent operation request to home network 410, the request is transmitted to S-CSCF 412 by P-CSCF1 411, S-CSCF 412 is received after the request, the attribute requirements information of network element is sent to user terminal 400, it is notified to select to support the P-CSCF of urgency traffic to initiate emergent operation request in visited network 420, and the information is to be transmitted to user terminal 400 by P-CSCF1 411；User terminal 400 is received after the attribute requirements information of network element, the attribute requirements with P-CSCF, to select suitable P-CSCF to carry out emergent operation request；IP CAN 422 are GPRS network, P-CSCF therein has found that device 600 is used for the P-CSCF discovery requests for receiving the transmission of user terminal 400, and selection can be used in the P-CSCF of emergent operation request in visited network, its address information is returned into user terminal 400, it is assumed that return be P-CSCF2 421 address information；User terminal 400 initiates emergent operation request using P-CSCF2 421.The concrete composition for finding device 600 on P-CSCF in user terminal 400 and IP CAN 422 is shown in Fig. 5 and 6 respectively.

Fig. 5 is the structure chart of user terminal 400 in the embodiment of the present invention one.As shown in figure 5, user terminal 400 specifically includes network element attribute demand receiving unit 501, network element selecting unit 502 and network element registration unit 503.

Wherein, network element attribute demand receiving unit 501, for receiving the transmission of home network 410 Network element attribute demand information or the network element attribute demand information of user's input, and send that information to network element selecting unit 502;Network element selecting unit 502, for finding that device 600 sends P-CSCF and finds to ask to P-CSCF, P-CSCF attribute requirements information is carried in the request, and the P-CSCF received is had found that the P-CSCF information carried in request response is sent to network element registration unit 503;Network element registration unit 503, the P-CSCF for being selected to network element selecting unit 502 initiates to register.

Fig. 6 is the structure chart of P-CSCF discovery devices 600 in the embodiment of the present invention one.The device is used to find P-CSCF when initiating emergent operation request in the system shown in Fig. 4.As shown in Fig. 6, the P-CSCF has found that device 600 is specifically included：User interface section 601, Data Management Unit 602 and protocol processing unit 603.

Wherein, user interface section 601, request is found for receiving and handling the P-CSCF that the network element selecting unit 502 of user terminal 400 in Fig. 5 is sent, i.e. by specifying APN (Access Point Name, APN) grouped data ten sent does view (Packet Data Protocol, PDP) activation request, user interface section 601 is according to the request, P-CSCF attribute query message is sent to protocol processing unit 603, receive the response message of its return, and the network element selecting unit 502 into Fig. 5 returns to the P-CSCF discovery request responses for carrying P-CSCF2 information；Data Management Unit 602, for storing the P-CSCF attribute informations in network；Protocol processing unit 603, P-CSCF attribute query message for receiving the transmission of user interface section 601, and satisfactory P-CSCF attribute informations are obtained by Data Management Unit 602, generation carries the query response message of satisfactory P-CSCF2 information, returns to user interface section 601.

Because the IP CAN 422 in the present embodiment are GPRS networks, therefore P-CSCF has found that the interface protocol in subscriber unit interface 601 and Fig. 5 in device 600 between the network element selecting unit 502 of user terminal 400 is GPRS interface protocols.Certainly, if IP CAN 422 are other fixed networks, such as WLAN, DSL, correspondingly, the interface protocol between user interface section 601 and user terminal 400 are the interface protocol of map network, such as DHCP (Dynamical Host Configure Protocol, DHCP) etc..

Described above is the system architecture in the embodiment of the present invention one, and the system can be used for the method for implementing the embodiment of the present invention shown in Fig. 7.

Fig. 7 is the method flow diagram of user access network in the embodiment of the present invention one.As shown in fig. 7, this method includes：

Step 701:User terminal 400 initiates emergent operation request to home network 410.

In this step, due to the P-CSCF of the chosen home network 410 of user terminal 400, as P-CSCF1411 carries out business processing, therefore when user terminal 400 initiates emergent operation request, emergent operation request sends the P-CSCF by home network 410 to the call session functions of home network；The emergent operation request of transmission can be Emmergency log-on, urgent call or the service request with urgency traffic correlation, such as emergency message.

Step 702:Home network 410 sends the message for carrying network element attribute demand to user terminal 400.

In this step, the P-CSCF1411 of home network is received after the emergent operation request of the transmission of user terminal 400, and the message for carrying network element attribute demand is returned to user terminal 400；Or the emergent operation request is sent to the S-CSCF412 of home network 410, notify P-CSCF1411 to return to the message of carrying network element attribute demand information by S-CSCF412.

In the present embodiment, the attribute requirements of network element are the attribute information for the P-CSCF that identifying subscriber terminal 400 is selected；The message for carrying the access network element attribute information is the message of SIP 380（Can certainly be other sip response messages）；Access network element attribute information can be increased in the header field of the message of SIP 380, example is as follows：

P_Acees-indicator: service=Emgency; Node=P-CSCF ; Location = visite ；

Wherein, Service identifies the ability that network element is supported, is in the present embodiment urgency traffic；Node marks need the network element classification of gravity treatment, are in the present embodiment P-CSCF; Position where Location mark network elements, is in the present embodiment visited network.

Step 703:According to the message of the carrying network element attribute demand received, the selection that access network element is P-CSCF is carried out in visited network 420.

In the present embodiment, because visited network 420 is IMS network, therefore when user terminal 400 will initiate emergent operation request using visited network 420, first have to select the P-CSCF in visited network 420 with processing urgency traffic ability, following selection mode can be used：

Step 703a:User terminal 400 sends P-CSCF to the IP CAN422 of visited network 420 and finds to carry the attribute requirements of network element in request message, request message, and this demand is specially to require that P-CSCF supports urgency traffic.

Because the IP CAN422 in the present embodiment are GPRS networks, it is therefore desirable to initiate PDP activation by an APN and ask, request is found comprising P-CSCF in activation request；In this step, find to increase configured information in request in the P-CSCF of transmission, be used for urgency traffic to identify the P-CSCF this time found.

Step 703b:The IP CAN422 of visited network 420 return to the response message for carrying the P-CSCF, such as addresses of P-CSCF2 421 that meet urgency traffic demand to user terminal 400.

Step 704:The P-CSCF for meeting urgency traffic Capability Requirement that user terminal 400 is returned according to IP CAN422, selection P-CSCF access IMS networks.

Because the P-CSCF2 421 of user terminal selecting has urgency traffic disposal ability, therefore emergent operation request process can be with normal continuance.

It can be seen that, in the above-described embodiments, user terminal 400 is before emergent operation request is initiated, it is not aware that chosen P-CSCF can not meet business demand, so, when initiating emergent operation request, emergent operation request is still initiated by the P-CSCF of home network 410；Home network 410 is when receiving the emergent operation request of user terminal 400, the attribute requirements of network element are just sent to user terminal 400, user terminal 400 is notified to select to meet the P-CSCF of network element attribute demand, select suitable P-CSCF to access in visited network 420, and initiate urgent industry Business request.

In the present embodiment, visited network 420 is IMS network, therefore when visited network 420 initiates emergent operation request, it is necessary to select suitable P-CSCF first;And P-CSCF Selection utilization P-CSCF discovery procedures are completed, and it addition of in the discovery request of the discovery procedure identification information for urgency traffic.Then the P-CSCF addresses and other information that can be used for urgency traffic in visited network 420 are returned to user terminal 400 by the discovery procedure, and user terminal 400 can initiate emergent operation request using it.In P-CSCF discovery procedures in the present embodiment, P-CSCF has found that device 600 has been returned only to P-CSCF address, but if multiple P-CSCF for meeting condition, multiple P-CSCF address can also be returned to, selected wherein by user terminal 400.

In addition, the IP CAN422 of visited network 420 are GPRS networks in the present embodiment, therefore the P-CSCF that user terminal 400 is sent has found that request is PDP activation request, if the IP CAN422 are fixed network, such as WLAN, DSL, the P-CSCF that then user terminal 400 is sent has found that request will be DHCP request message, can carry out option parameter extension, the attribute requirements information for carrying network element to the message.

In the system architecture of the present embodiment, because visited network 420 and home network 410 are IMS networks, therefore network element during access network is P-CSCF, when network is other latticed forms, the network element also mutually should be the access device in map network structure, at this moment, also gravity treatment is carried out according to the information of respective network elements when network element selection is carried out in user terminal 400, without being limited on P-CSCF.

The present embodiment is the embodiment of the invention illustrated by taking urgency traffic as an example, in fact, for other types of service, the embodiment of the present invention is equally applicable.By taking the service request that endorsed quality of service requirement as an example, compared with the operation in the present embodiment, the attribute requirements of network element needed for user can indicate directly in step 403, so as to carry out business processing from the related network element of Network Capture, and the P-CSCF of selection is linked into, the service request of initiation includes quality of service guarantee requirement. In addition, in addition to the professional ability such as urgency traffic and quality of service requirement, access different types of terminals professional ability can also be to professional ability requirement, such as access mobile terminal and access fixed terminal, Capability Requirement to P-CSCF is inconsistent, or the professional ability requirement to network element place network is can also be, network where such as requiring access network element has continuous voice call (VCC) professional ability, positioning service ability professional ability.Certainly they can also be exactly the professional ability requirement to access network element.

The method for above mentioned embodiment providing the network element attribute demand progress network element selection that a kind of user sends according to network, its core is the network element that Network finding user is currently accessed needed for can not meeting user service after ability, the network element of ability needed for instruction user selection disclosure satisfy that user service.If in fact, user initially attachment IP access networks when, can just be needed according to user service selection one can meet needed for ability access network element, it is possible to from root solution user access networks member can not meet user service needed for ability the problem of.Embodiment two is such embodiment.

Embodiment two：

The method that another user access network is provided in the present embodiment, first, user terminal initiates the attach request of attachment IP access networks, IP access networks return to available access network element list by attach request response, including one or more access network element and its attribute, the attribute includes：The positional information of network element, and/or the ability information of network element, and/or support the professional ability of different types of terminals etc., the network element access of user's ability according to needed for access network element Attributions selection one disclosure satisfy that user service, access request is initiated from user terminal to it, SIP registration message is such as sent.

Such as, user needs to initiate urgency traffic, and urgency traffic can only pass through visited place

P-CSCF is provided, and therefore, user selects the P-CSCF of a visited place from access network element list, is sent to registration message；Or when using the mobile terminal initiation urgency traffic of GRPS accesses, the P-CSCF progress business processings that GRPS is accessed are supported in selection.

In the present embodiment, it is assumed that the visited network and home network of user terminal are IMS network, And the IP CAN of visited network are DSL network.

Fig. 8 is the system construction drawing of user access network in the embodiment of the present invention two.As shown in figure 8, the system includes：User terminal 800 and visited network 820.Wherein, visited network 820 includes P-CSCF2 821 and IP CAN 822, and IP CAN 822 specifically include P-CSCF and find device 1000 and P-CSCF configuration servers 1010.

Wherein, user terminal 800, attach request is sent for the IP CAN 822 into visited network 820, find P-CSCF requests, to initiate IP network attachment, and receiving the attach request for the including available access network element attribute information response of the returns of IP CAN 822, i.e. P-CSCF has found request response；IP CAN 822 are DSL network, P-CSCF therein has found that device 1000 is used for the P-CSCF discovery requests for receiving user terminal transmission, and available P-CSCF is selected in visited network 820, its list information is carried and returns to user terminal 800 in attach request response;P-CSCF configuration servers 1010 are used to all P-CSCF attribute informations in visited network 820 being configured in P-CSCF discovery devices 1000；User terminal 800 selects the P-CSCF2 821 for meeting network element attribute demand from the list received, initiates emergent operation request.

Above-mentioned is the system embodiment of user access network in the embodiment of the present invention two, finds that the concrete composition of device 1000 is shown in Fig. 9 and 10 respectively on wherein user terminal 800 and P-CSCF.

Fig. 9 is the structure chart of user terminal 800 in the embodiment of the present invention two.As shown in figure 9, user terminal 800 specifically includes network element attribute demand receiving unit 901, net element information acquiring unit 904, network element selecting unit 902 and network element registration unit 903.

Wherein, network element attribute demand receiving unit 901, for receiving the network element attribute demand information of user's input, and sends that information to network element selecting unit 902;Net element information acquiring unit 904, for finding that device 1000 sends P-CSCF and finds to ask to P-CSCF, and the P-CSCF discovery request responses of return are received, to obtain P-CSCF attribute information, and the attribute information is sent to network element selecting unit 902;Network element selecting unit 902, for according to the network element category received Property information, selection can meet the P-CSCF of network element attribute demand requirement, and the information of the P-CSCF is sent into network element registration unit 903;Network element registration unit 903, the P-CSCF for being selected to network element selecting unit 902 initiates to register.

Figure 10 is the structure chart of P-CSCF discovery devices 1000 in the embodiment of the present invention two.The device is used to initiate in visited network to find P-CSCF during emergent operation request in the system shown in Fig. 8.As shown in Figure 10, the device is specifically included：User interface section 1001, Data Management Unit 1002, protocol processing unit 1003 and configuring interface units 1004.As can be seen that the P-CSCF in the present embodiment has found that device 1000 compared with the P-CSCF in embodiment one has found device 600, adds configuring interface units 1004.

Wherein, user interface section 1001, request is found for receiving and handling the P-CSCF that user terminal 800 is sent in Fig. 8, that is DHCP request message, user interface section 1001 is according to the request, P-CSCF attribute query message is sent to protocol processing unit 1003, the response message of its return is received, and user terminal 800 into Fig. 8 returns to the DHCP request response message for carrying all available P-CSCF information lists；Data Management Unit 1002, for storing the P-CSCF attribute informations in network；Protocol processing unit 1003, P-CSCF attribute query message for receiving the transmission of user interface section 1001, and satisfactory P-CSCF attribute informations are obtained by Data Management Unit 1002, generation, which is carried, can use the query response message of P-CSCF information lists, return to user interface section 1001;Configuring interface units 1004, for when the attribute information of the P-CSCF in network changes, the P-CSCF configuration attribute information that P-CSCF configuration servers 1010 are sent in Fig. 8 is received, and according to the change, updates the data the P-CSCF attribute informations in administrative unit 1002.

IP CAN in the present embodiment use DHCP protocol for the interface protocol between user terminal 800 in DSL network, therefore user interface section 1001 and Fig. 8.

As seen from Figure 8, the user terminal 800 in the present embodiment adds net element information acquiring unit 904 compared with the user terminal 400 in embodiment one, for initiating attach request to IP CAN, P-CSCF attribute requirements are not included in the attach request, therefore the attribute information of all available P-CSCF in network is carried in its response received, these P-CSCF attribute information is sent to network element selecting unit 902 and carries out network element selection by net element information acquiring unit 904.

,, can be with the P-CSCF attribute informations in real-time update Data Management Unit 1002 using increased P-CSCF configuring interface units 1004 in the P-CSCF of the present embodiment has found device from Figure 10.In the present embodiment, updating P-CSCF attribute informations is realized by the P-CSCF configuration servers 1010 in Fig. 8, naturally it is also possible to updated manually by webmaster.In addition, the structure of device 1000 can also be found using P-CSCF in embodiment one, so as to realize the real-time update of P-CSCF attribute informations in corresponding data administrative unit.

Figure 11 is the method flow diagram of user access network in the embodiment of the present invention two.As shown in figure 11, this method includes：

Step 1101:User terminal 800 initiates to adhere to the attach request of IP access networks to the IP CAN822 of visited network 820, i.e. P-CSCF has found request.

Because the IP CAN822 in the present embodiment are DSL networks, therefore the attach request is dhcp message.

Step 1102:The IP CAN822 of visited network 820 return to the attach request response message for carrying P-CSCF lists to user terminal 800.

In this step, the response message of return is DHCP request response message, and DHCP request response message is carried out into option parameter extension, and P-CSCF lists are carried using the option parameter of extension；At least include available P-CSCF address in P-CSCF lists and whether can be used for the attribute information of urgency traffic, other attribute informations, such as geographical location information, the version information for supporting IMS can also be included certainly.

Step 1103:User terminal 800 selects a suitable P-CSCF in P-CSCF lists.In this step, user terminal 800 determines that network element attribute demand should include supporting urgency traffic, and therefore, according to every attribute information in the P-CSCF lists received, selection one meets net The P-CSCF of meta-attribute demand, the P-CSCF at least can be used for the P-CSCF of urgency traffic.Step 1104:When user terminal 800 will initiate emergent operation request, selection is utilized

P-CSCF initiates emergent operation request.

So far, in emergent operation request, the method flow of user access network terminates.User terminal 800 initiates emergent operation request by visited network 820, the situation for sending request failure would not occurs.

In the present embodiment, the network element attribute demand that user terminal 800 confirms according to itself, in the attach request response message for including available P-CSCF attribute informations received, selection meets the P-CSCF accesses of network element attribute demand.Certainly, can also be when user terminal 800 sends attach request to IP access networks, carry the network element attribute demand information that user terminal 800 confirms, IP access networks are when returning to attach request response, the access network element information for meeting network element attribute demand is directly returned, rather than returns to all available access network element attribute informations.

Therefore, the method in the present embodiment is：User terminal 800 is attached to before IP access networks, it can determine that the attribute requirements of network element, according to the available P-CSCF attribute informations included in the IP access networks attach request response received, selection meets the P-CSCF accesses of network element attribute demand, so, suitable P-CSCF just can be directly selected from visited network 820 come to send the method in emergent operation request, i.e. the present embodiment be that user terminal 800 actively selects to meet the network element of network element attribute demand and completes access.

And in embodiment one, home network 410 is when user terminal 400 initiates emergent operation request by the P-CSCF of home network 410, just network element attribute demand is sent to user terminal 400, user terminal 400 is received after the network element attribute demand information from the initiation emergent operation request of visited network 420, method i.e. in embodiment one be user terminal 400 passively after network advertisement, the network element that selection meets network element attribute demand completes access.

In the present embodiment, when user terminal 800 is roamed, its visited network 820 is the core net that user terminal 800 is roamed into；When user terminal 800 is not roamed, it visits net Network 820 is the home network of user terminal 800.In the present embodiment, visited network 820 is IMS networks, naturally it is also possible to be Circuit Switching Network and the PES networks based on IMS；IP CAN 822 in visited network 820 are DSL network, naturally it is also possible to be other fixed networks such as WLAN, or GPRS network, and for different networks, the type of message simply sent is changed.

Embodiment three：

Open Mobile Alliance（Open Mobile Alliance, OMA) equipment control/client supply (Device Management/Client Provisioning, DM/CP terminal unit management) can be carried out and firmware updates, interface between user terminal can be HTTP (Hypertext Transfer Protocol, HTTP), wireless session ten does view (Wireless Session Protocol, WSP), Object Exchange（Object Exchange protocol, OBEX) or sync id language (Synchronization Mark-up Language, SyncML) etc..

The method that another user access network is provided in the present embodiment, first, using the equipment Management Function based on OMA DM/CP standards of network available access network element list is returned to for user terminal, including one or more access network element and its attribute, the attribute includes：The positional information of network element, and/or the ability information of network element, and/or support the professional ability of different types of terminals etc., the access network element of user's ability according to needed for access network element Attributions selection one disclosure satisfy that user service, access request is initiated from user terminal to it, SIP registration message is such as sent.

Such as, user is needed to initiate urgency traffic, and urgency traffic can only be provided by the P-CSCF of visited place, and therefore, user selects the P-CSCF of a visited place from access network element list, and registration message is sent to by user terminal；Or when using the mobile terminal initiation urgency traffic of GRPS accesses, the P-CSCF progress business processings that GRPS is accessed are supported in selection.

In this embodiment it is assumed that the visited network and home network of user terminal are IMS network, and the IP CAN of visited network are DSL network.

The idiographic flow of the above-mentioned user access network method provided for the present embodiment, the present embodiment additionally provides the system architecture of user access network, and the system can be used for implementing above method flow.Figure 12 be the system construction drawing of user access network in the embodiment of the present invention three.As shown in figure 12, the system includes：User terminal 1200, service network 1220 and DM servers 1230.Wherein, the moon, good business network 1220 included P-CSCF2 1221.

Within the system, user terminal 1200, the attribute information of access network element can be used for being obtained from the DM months good business device 1230, P-CSCF lists and attribute information are can use, and selection meets the initiation emergent operation requests of P-CSCF2 1221 of network element attribute demand in the P-CSCF lists of acquisition.Service network 1220 is the network where user terminal, can be IMS network or circuit-switched network or the PES networks based on IMS.

Above-mentioned is the system embodiment of user access network in the embodiment of the present invention three, and the annexation on the wherein concrete composition of user terminal 1200 and itself and DM servers 1230 is shown in Figure 13.

As shown in figure 13, user terminal 1200 specifically includes network element attribute demand receiving unit 1301, net element information acquiring unit 1304, network element selecting unit 1302 and network element registration unit 1303.

Wherein, network element attribute demand receiving unit 1301, the attribute requirements information of the network element for receiving user's input, and send that information to network element selecting unit 1302;Net element information acquiring unit 1304, can use P-CSCF list and attribute information, and the attribute information is sent into network element selecting unit 1302 for being obtained from DM servers 1230;Network element selecting unit 1302, for according to the network element attribute information received, selection can to meet the P-CSCF of network element attribute demand, and the information of the P-CSCF is sent into network element registration unit 1303;Network element registration unit 1303, the P-CSCF for being selected to network element selecting unit 1302 initiates to register.

In the present embodiment, the interface protocol between the net element information acquiring unit 1304 in DM servers 1230 and user terminal 1200 can be HTTP, WSP, OBEX or SyncML.The interaction of access network element attribute information is carried out using these agreements.

As seen from Figure 13, the structure of user terminal 1200 in the present embodiment is identical with the structure of the user terminal 800 in embodiment two, and difference is, in net element information acquiring unit 1304 and Fig. 9 The function of net element information acquiring unit 904 is different.In the present embodiment, net element information acquiring unit 1304 interacts to obtain with DM servers 1230 can use P-CSCF attribute information.

Figure 14 is the method flow diagram of user access network in the embodiment of the present invention three.As shown in figure 14, this method includes：

Step 1401:User terminal 1200 obtains available P-CSCF lists from DM servers 1230.

At least include available P-CSCF address in P-CSCF lists and whether can be used for the attribute information of urgency traffic, other attribute informations, such as geographical location information, the version information for supporting IMS can also be included certainly.

In this step, the mode that user terminal 1200 obtains available P-CSCF lists from DM servers 1230 can be：User terminal 1200 sends P-CSCF list requests to the good business devices 1230 of DM, and DM servers 1230 return to available P-CSCF lists to user terminal 1200；Or, the active of DM servers 1230 sends available P-CSCF lists to user terminal 1200.In the second way, the good business devices 1230 of DM can send available P-CSCF lists in network of the user terminal 1200 due to moving into the place of DM servers 1230 to user terminal 1200；Or, according to time interval set in advance, regularly send available P-CSCF lists to user terminal 1200.

Step 1402:User terminal 1200 selects a suitable P-CSCF in P-CSCF lists.

In this step, user terminal 1200 determines that network element attribute demand should include supporting urgency traffic, therefore every attribute information of the user terminal 1200 in the P-CSCF lists received, selection one meets P-CSCF of network element attribute demand, and the P-CSCF at least can be used for the P-CSCF of urgency traffic.

Step 1403:When user terminal 1200 will initiate emergent operation request, emergent operation request is initiated using the P-CSCF of selection. So far, in emergent operation request, the method flow of user access network terminates.User terminal 1200 initiates emergent operation request by visited network, the situation for sending request failure would not occurs.

In the present embodiment, it is that the list of access network element can be used to the transmission of user terminal 1200 using DM servers 1230, naturally it is also possible to the function is realized using other network entities.Meanwhile, realize in the core network sent where being located at user terminal 1200 at present with the network entity of access network element listing function.

From the above, it is seen that the method for user access network and embodiment one and two are different in the present embodiment.In the present embodiment, user terminal 1200 is to obtain that the attribute information of access network element can be used using the equipment Management Function based on OMA DM/CP standards, so as to select satisfactory network element initiating business request in these available access network elements.

The embodiment of the present invention is illustrated by taking urgency traffic as an example, in fact, for other form of services such as quality of service guarantee, the present invention is equally applicable.After method and system using the present invention, the network element access of user terminal professional ability of required service before being fated according to access network element attribute information, selector thus can normally realize user service, business is normally implemented.

It can be seen that, using the technical scheme of the embodiment of the present invention, user terminal is according to the attribute requirements for network element, and selection disclosure satisfy that the network element access of user service, thus can normally realize the user service required by user terminal, business is normally implemented.Moreover, user terminal obtain network element attribute requirements method can be itself according to type of service, determine the attribute requirements of network element, when being first attached to IP access networks, i.e., actively selection meet attribute requirements network element access；Or, after having already accessed in service network, service request is sent to service network, service network determines to meet the attribute requirements of the network element of the service according to the request of user terminal, and notify the attribute requirements of the network element to user terminal, it is desirable to user terminal re-accessing network.That is, user terminal can obtain network element attribute demand by way of active selection or passive informing. Presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.

Claims (30)

1. Claims

   1st, a kind of method of user access network, it is characterised in that this method includes：User terminal is according to the attribute requirements for network element, the network element access of ability needed for selection disclosure satisfy that user service.

   2nd, according to the method described in claim 1, it is characterised in that before this method, further comprise：

   The announcement information that the user terminal is sent according to network determines that the attribute requirements for network element, or the user terminal ^ ^ determine the attribute requirements for network element according to the business to be used.

   3rd, method according to claim 2, it is characterised in that the method that the network sends announcement information to the user terminal includes：

   The network element that user terminal described in the Network finding has currently been accessed can not meet the ability needed for the user service, and announcement information is sent to the user terminal, notify the user terminal selecting to support the network element access of the required ability of service.

   4th, method according to claim 3, it is characterised in that the network carries the announcement information using initial session protocol sip message.

   5th, according to the method described in claim 1, it is characterised in that the method for the network element of ability includes needed for the user terminal selecting disclosure satisfy that user service：

   The user terminal initiates network attachment request, and the attribute requirements information of the network element is carried in the network attachment request, the network element of ability needed for the network meets user service to user terminal return；

   Or, the user terminal therefrom selects an attribute information to meet the network element of the network element attribute demand according to the network element attribute information obtained.

   6th, method according to claim 5, it is characterised in that the method that the user terminal obtains network element attribute information includes：

   The user terminal initiates network attachment request, and the network returns to institute to the user terminal State network element attribute information；

   Or, network entity sends network element attribute information according to the request of the user terminal to the user terminal；

   Or, the network entity actively sends network element attribute information to the user terminal.

   7th, method according to claim 6, it is characterised in that the network element attribute information includes：Professional ability, and/or positional information.

   8th, method according to claim 7, it is characterised in that the professional ability is at least following one kind：Urgency traffic ability, quality of service guarantee professional ability, access different types of terminals professional ability, continuous voice call VCC professional abilities, positioning service ability.

   9th, the method according to any one of claim 1 ~ 8, it is characterised in that the network element be IP multimedia subsystem IMS network in act on behalf of Session Control Unit P-CSCF.

   10th, method according to claim 9, it is characterised in that the P-CSCF of ability method includes needed for the user terminal selecting disclosure satisfy that user service：

   The user terminal initiates P-CSCF discovery procedures, and increases configured information, P-CSCF attribute requirements of the mark to this discovery in the P-CSCF for being sent to IP access networks has found request；

   The P-CSCF that the IP access networks receive user terminal transmission is had found after request, selects satisfactory P-CSCF, and the satisfactory P-CSCF information carrying is returned into the user terminal in the response message that P-CSCF has found request.

   11st, method according to claim 10, it is characterised in that

   When the user terminal adheres in fixed net, described to find to increase configured information in request in the P-CSCF for being sent to IP access networks, identify includes to the method for the P-CSCF attribute requirements of this discovery：Increase option parameter in dynamic host configuration protocol DHCP request message, for identifying the P-CSCF attribute requirements to this discovery；

   It is described to be sent to IP access networks when the user terminal adheres in the gprs networks Increase configured information in P-CSCF discovery requests, identify includes to the method for the P-CSCF attribute requirements of this discovery：Packet data protocol (PDP) activating is initiated by specified APN APN to ask, to identify the P-CSCF attribute requirements to this discovery.

   12nd, method according to claim 9, it is characterised in that the P-CSCF of ability method includes needed for the user terminal selecting disclosure satisfy that user service：

   The user terminal initiates P-CSCF discovery procedures, and sending P-CSCF to IP access networks finds to ask；

   The IP access networks carry the response message of available P-CSCF attribute informations to the user terminal loopback；

   The user terminal can use P-CSCF attribute information according to described, the P-CSCF of ability needed for selector closes user service.

   13rd, method according to claim 12, it is characterised in that

   When the user terminal is adhering in fixed net, the response message is DHCP request response message, and option parameter is increased in the DHCP request response message, and described P-CSCF attribute informations can be used to carry.

   14th, method according to claim 9, it is characterised in that the P-CSCF of ability method includes needed for the user terminal selecting disclosure satisfy that user service：

   The user terminal returns to the P-CSCF lists for carrying available P-CSCF attribute informations to the user terminal to network entity requests P-CSCF lists, the network entity；

   The user terminal can use P-CSCF attribute information according to described, the P-CSCF of ability needed for selector closes user service.

   15th, method according to claim 9, it is characterised in that the P-CSCF of ability method includes needed for the user terminal selecting disclosure satisfy that user service：

   The network entity actively sends available P-CSCF lists to the user terminal, and carrying can use P-CSCF attribute information in the P-CSCF lists； The user terminal can use P-CSCF attribute information according to described, the P-CSCF of ability needed for selector closes user service.

   16th, a kind of system of user access network, it is characterised in that the system includes：User terminal and the moon good business network；

   The user terminal, for according to the attribute requirements for network element, the network element of ability to be accessed needed for selection disclosure satisfy that user service；

   Service network, the network element of ability needed for for disclosure satisfy that user service for user terminal offer.

   17th, system according to claim 16, it is characterised in that the user terminal includes：Network element attribute demand receiving unit, network element selecting unit and network element registration unit；

   The network element attribute demand receiving unit, for receiving the announcement information that the service network is sent, and determines according to the announcement information or the business to be used the attribute requirements of network element, is sent to the network element selecting unit；

   The network element selecting unit, for receiving the network element attribute demand information, initiate to carry the attach request of the network element attribute demand information to the service network, and by the service network return meet user service needed for the information of network element of ability be sent to the network element registration unit, or according to the network element attribute information obtained, the network element of ability needed for selection disclosure satisfy that user service, and the information of the network element is sent to the network element registration unit；

   The network element registration unit, the network element for being obtained to the network element selecting unit initiates to register.

   18th, system according to claim 17, it is characterised in that the user terminal further comprises：Net element information acquiring unit, the network element selecting unit is sent to for obtaining network element attribute information, and by the network element attribute information.

   19th, the system according to any one of claim 16 ~ 18, it is characterised in that the service network is IMS network, the system further comprises IP access networks；

   The IP access networks, for finding that P-CSCF can be used, and by described with P-CSCF's Attribute information is sent to the user terminal.

   20th, the system according to any one of claim 16 ~ 18, it is characterized in that, the system further comprises network entity, for receiving request of the user terminal for network element attribute information, and network element attribute information is sent to the user terminal, or, the network element attribute information is directly sent to the user terminal.

   21st, system according to claim 20, characterized in that, the interface protocol between the network entity and user terminal is HTTP HTTP, WSP WSP, Object Exchange OBEX or sync id language SyncML.

   22nd, system according to claim 20, it is characterised in that the network entity is equipment control/client provisioning server that DM/CP standards are supplied based on open mobile alliance OMA equipment control/client.

   23rd, system according to claim 19, it is characterized in that, the IP access networks include P-CSCF and find device, request is found for receiving the P-CSCF that the user terminal is sent, and the P-CSCF discovery request responses for carrying available P-CSCF information are returned to user terminal.

   24th, system according to claim 23, it is characterised in that the P-CSCF has found that device is specifically included：User interface section, Data Management Unit and protocol processing unit；

   The user interface section, P-CSCF for receiving and handling user terminal transmission has found request, P-CSCF attribute query message is sent to the protocol processing unit, and after the response message of the protocol processing unit is received, the P-CSCF for carrying available P-CSCF attribute informations to the user terminal loopback has found request response；

   The Data Management Unit, for storing the P-CSCF attribute informations in network；The protocol processing unit, for receiving the P-CSCF attribute query message that the user interface section is sent, P-CSCF attribute information can be used by inquiring about the Data Management Unit acquisition, and generate carry it is described can use the query response message of P-CSCF attribute informations, return to described User interface section.

   25th, system according to claim 24, it is characterized in that, the P-CSCF has found that device further comprises configuring interface units, P-CSCF configuration attribute information in the network for receiving webmaster transmission, and stores into the Data Management Unit.

   26th, system according to claim 24, it is characterised in that the system further comprises P-CSCF attribute configuration servers；The P-CSCF has found that device further comprises configuring interface units；

   The P-CSCF attribute configurations server, the configuration attribute information for sending P-CSCF in network to the configuring interface units；

   The configuring interface units, for receiving the configuration attribute information of P-CSCF in the network that the P-CSCF attribute configurations server is sent, and are stored into the Data Management Unit.

   27th, system according to claim 24, it is characterised in that the interface protocol of the user interface section is DHCP protocol or GPRS agreements.

   28th, a kind of subscriber terminal equipment, it is characterised in that the equipment includes：Network element attribute demand receiving unit, network element selecting unit and network element registration unit；

   The network element attribute demand receiving unit, for receiving the announcement information of service network transmission, and determines according to the announcement information or the business to be used the attribute requirements of network element, is sent to the network element selecting unit；

   The network element selecting unit, for receiving the network element attribute demand information, initiate to carry the attach request of the network element attribute demand information to the service network, and by the service network return meet user service needed for the information of network element of ability be sent to the network element registration unit, or according to the network element attribute information obtained, the network element of ability needed for selection disclosure satisfy that user service, and the information of the network element is sent to the network element registration unit；

   The network element registration unit, the network element for being obtained to the network element selecting unit initiates to register.

   29th, equipment according to claim 28, it is characterised in that enter in the user terminal One step includes：Net element information acquiring unit, the network element selecting unit is sent to for obtaining network element attribute information, and by the network element attribute information.

   30th, one kind acts on behalf of Session Control Unit discovering device, it is characterised in that the equipment includes：User interface section, Data Management Unit and protocol processing unit；

   The user interface section, P-CSCF for receiving and handling user terminal transmission has found request, P-CSCF attribute query message is sent to the protocol processing unit, and after the response message of the protocol processing unit is received, the P-CSCF for carrying available P-CSCF attribute informations to the user terminal loopback has found request response；

   The Data Management Unit, for storing the P-CSCF attribute informations in network；The protocol processing unit, for receiving the P-CSCF attribute query message that the user interface section is sent, P-CSCF attribute information can be used by inquiring about the Data Management Unit acquisition, and generate carry it is described can use the query response message of P-CSCF attribute informations, return to the user interface section.