CN100407876C - User's device attaching method - Google Patents

Abstract

The present invention is applicable to the technical field of mobile communication, particularly an attaching method for users' devices in a 3GPP evolution network. When an attaching request is initiated by a user' device to a core network, the user' device indicates whether an IP address of a function entity P-CSCF of a call session control agent is needed. The IP address of the P-CSCF is obtained in the process of UE attachment by the attaching method for users' devices in a 3GPP evolution network, and IMS register can be carried out after the attachment is completed. Thus, the signaling process of the connection and the establishment of users' business can be simplified, and the time delay of business connection is reduced.

Description

A kind of user's device attaching method

Technical field

The invention belongs to the communications field, relate in particular to a kind of user's device attaching method.

Background technology

Existing GPRS (General Package Radio Service, GPRS)/UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) network configuration as shown in Figure 1, adopted and the similar structure of second generation mobile communication system, comprise UMTS (UniversalMobile Telecommunications System, universal mobile telecommunications system) land radio access web (UMTSTerritorial Radio Access Network, UTRAN), GSM EDGE Radio Access Network (GSM/EDGE Radio Access Network, GERAN), core net (Core Network, CN) and subscriber equipment (User Equipment, UE).Wherein, GERAN/UTRAN is used to realize all and wireless function associated, and CN handles that all voice calls are connected with data in the GPRS/UMTS system, and is used to realize and the exchange of external network and the function of route.CN from be divided in logic circuit commutative field (Circuit Switched Domain, CS) and packet-switched domain (Packet Switched Domain PS), supports speech and data service respectively.

The CS territory comprises Mobile Switching Center Server (MSC-Server), media gateway (MGW) and Gateway Mobile Switching Center server nodes such as (GMSC-Server).Wherein, MSC-Server is used to transmit the chain of command data in CS territory, realize mobile management, call out functions such as control and authentication ciphering, GMSC-Server is used to realize the calling control of GMSC and the chain of command function that mobility is controlled, and MGW is used to realize the transmission of user face data;

The PS territory comprises service universal grouping wireless business supporting node (SGSN) and ggsn nodes such as (GGSN).Wherein, GGSN mainly is responsible for and external network carries out interface, and simultaneously, GGSN also is responsible for realizing the transmission of user face data.Position and the MSC Server in CS territory of SGSN in the PS territory is similar, and its Core Feature is to realize functions such as routing forwarding, mobile management, session management and user profile storage.

(Home Location Register HLR) is used for storing user subscription information to attaching position register, and this equipment is all used in CS and PS territory.

3GPP (Third Generation Partnership Project, third generation partner program) IMS (the IP Multimedia Core Network Subsystem that on the network foundation of existing P S territory, superposeed, the IP multimedia core network subsystem) network, as shown in Figure 2, introduce conversation initialized protocol (Session InitiationProtocol, SIP) as professional control protocol, utilize simple, the easy expansion of SIP, media combination characteristics easily, by business control is separated with carrying control, provide abundant multimedia service.More descriptions about IMS please refer to agreement 3GPP TS 23.228 v6.10.0, and the present invention quotes at this, does not do and gives unnecessary details.

Wherein, (Call Session Control Function is an IMS server processing unit CSCF) to call conversation control function entity, is used for controlling functions such as user's registration, session control.Divide according to function, comprise CSCF agent functionality entity (Proxy CSCF, P-CSCF), CSCF query function entity (Interrogating CSCF, I-CSCF) and CSCF service function entity (Serving CSCF, S-CSCF) three logic entities.

P-CSCF is the unified preliminary entrance of control plane, IMS visit territory, realization will be from the sip message (for example: registration, Multimedia session etc.) of visit ground access network, and the agency is transferred to the S-CSCF (according to registration time write down information) of its ownership place or I-CSCF functions such as (home domain name of carrying according to sip user agent).

I-CSCF is the unified preliminary entrance of IMS home domain control plane, in the IMS registration process according to home network server (Home Subscriber Server, HSS) the signatory and CSCF ability information of the user who returns, for the user assigns a S-CSCF, and will forward S-CSCF before the register requirement to, when in time-out time, not receiving the intended response that S-CSCF returns, also be responsible for gravity treatment S-CSCF.

S-CSCF is in the control core status in the session control of entire I MS core net, have the register requirement of acceptance from user's process P-CSCF forwarding in IMS visit territory, cooperate with HSS IMS subscriber equipment user is carried out authentication, and from HSS, download the basic subscription data of IMS, execution is at calling terminal and called end IMS user's basic session routing function, and function such as assessment IMS subscription triggering rule;

HSS is used for preserving at home network IMS user's CAMEL-Subscription-Information, is positioned at the top layer of IMS core network architecture in IMS as the database of storing subscriber information.Comprise basic identification, routing iinformation and service profile etc.

3GPP is studying a kind of 3GPP network system of evolution in order to strengthen the competitiveness of future network.A kind of evolution block core net network framework as shown in Figure 3, comprise Mobility Management Entity (MobilityManagement Entity, MME), user entity (User Plane Entity, UPE) and three logical functional entities of the user's face anchor point between the different access systems (Inter Access System Anchor, Inter AS Anchor).Wherein, MME is responsible for the mobile management of chain of command, comprises the management of user's context and mobile status, and distributing user temporary identity sign etc. are corresponding to the control plane part of current GPRS/UMTS internal system SGSN; UPE is responsible for initiating paging for downlink data under the idle condition, and IP bearing parameter and the interior routing iinformation of network etc. are preserved in management, corresponding to the datum plane part of current GPRS/UMTS internal system SGSN and GGSN; Inter AS Anchor then serves as the user's face anchor point between different access systems.(Policy and Charging Rule Function PCRF) is used for chargeing and policy control for charging and strategic control module.(Home Subscriber Server HSS) is used for storing user subscription information to home network server.

Demand according to the evolution block core net network, UE finish adhere in, can provide default IP access service between UE and the evolution block core net network, this default IP access service allows UE to be registered in the IMS system, so can know the IP address of P-CSCF after requiring UE to adhere to finish, just can be registered in the IMS system.

Fig. 4 shows the realization flow that the user adheres among the 3GPP TR23.882, and details are as follows:

1.UE send network discovery and connecting system selection message (Network Discovery and Access System Selection) to evolution Access Network (Evolved RAN), select network and connecting system;

2.UE send Attach Request message (Attach Request) to MME/UPE;

3. if carry the log-on message of old side in the Attach Request message, then MME/UPE sends former registration information (Send old registration information) is obtained the user to old side MME/UPE information;

4. old side MME/UPE sends user profile (Send user information);

5. new side MME/UPE carries out authentication (Authentication) to UE;

6. new side MME/UPE is registered to (Register MME/UPE) among the HSS;

7. delete the log-on message (Delete UE registrationinformation) of UE at old side MME/UPE;

8.HSS confirm the registration (Confirm Registration) of new side MME/UPE;

9.MME/UPE select an Inter AS Anchor (Selection of Intersystem MobilityAnchor GW);

10.Inter AS Anchor uses the distributing IP address of UE to carry out the configuration of IP layer, the user plane between UE and Inter ASAnchor is established, and default charging and policing rule is used (User Plane RouteConfiguration);

11.MME/UPE and the default employed QoS of IP access bearer (Configure IP Bearer QoS) of configuration between the evolution Access Network;

12.MME/UPE that accepts UE adheres to request (Attach Accept), and distributes the temporary mark of UE;

13.UE confirm to adhere to successfully (Attach Confirm).

By above-mentioned flow process as seen, UE can not obtain the IP address of P-CSCF in attaching process, adheres to can't be registered among the IMS after finishing.

Summary of the invention

The object of the present invention is to provide a kind of user's device attaching method, be intended to solve UE in the prior art can not be known P-CSCF in attaching process IP address, cause adhering to the problem that can't be registered to after finishing among the IMS.

The object of the present invention is achieved like this, a kind of user's device attaching method, and described method comprises the steps:

A. subscriber equipment sends Attach Request message to core net, carries the indication information that subscriber equipment needs the IP address of call session control agent functional entity P-CSCF in the described Attach Request message;

B. core net is obtained the IP address of described call session control agent functional entity P-CSCF;

C. core net sends to adhere to subscriber equipment and accepts message, the described IP address of accepting to carry in the message described call session control agent functional entity P-CSCF of adhering to.

Described indication information carries by the MS network capability cell MS networkcapability in the Attach Request message.

Core net is obtained the IP address of described call session control agent functional entity P-CSCF according to the employed Access Point Name APN of subscriber equipment.

After described step C, described method further comprises:

D. subscriber equipment is preserved the IP address of described call session control agent functional entity P-CSCF.

The present invention obtains the IP address of P-CSCF in the attaching process of UE, adhere to finish after UE just can carry out IMS registration, can simplify customer service and connect and set up signaling process, reduce the professional time delay that connects.

Description of drawings

Fig. 1 is the network architecture diagram of existing GPRS/UMTS;

Fig. 2 is the network architecture diagram of IMS of having superposeed on the network foundation of existing P S territory;

Fig. 3 is the Organization Chart of evolution block core net network;

Fig. 4 is the prior art realization flow figure that UE adheres in evolution block core net;

Fig. 5 is the realization flow figure that UE adheres in evolution block core net among the present invention.

Embodiment

In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.

Obtain the IP address of P-CSCF in the process that the present invention adheres to by UE in evolution block core net, adhere at subscriber equipment and just can be registered among the IMS after finishing, make the evolution block core net network adhere to and to provide default IP access service after finishing at UE.

Fig. 5 shows that UE is at the realization flow that adheres in evolution block core net among the present invention, and details are as follows:

1.UE send network discovery and connecting system selection message (Network Discovery and Access System Selection) to evolution Access Network (Evolved RAN), select network and connecting system;

2.UE send Attach Request message to MME/UPE, carry the indication information whether UE needs the IP address of P-CSCF in the Attach Request message;

As one embodiment of the present of invention, carrying the indication information whether UE needs the IP address of P-CSCF in MS network capabilities in Attach Request message (MS networkcapability) cell, specifically can be to increase a P-CSCF flag bit IP Indicator to be used to refer to the information whether UE needs the IP address of P-CSCF.When this flag bit was 1, expression MS needed P-CSCF IP address (Mobile station needP-CSCF IP address); When this flag bit was 0, expression MS did not need P-CSCF IP address (Mobilestation need not P-CSCF IP address), and the example structure of MS network capability cell is as follows:

<MS?network?capability?value?part>:＝ <GEA1?bits> <SM?capabilities?via?dedicated?channels:bit> <SM?capabilities?via?GPRS?channels:bit> <UCS2?support:bit> <SS?Screening?Indicator:bit?string(2)> <SoLSA?Capability:bit> <Revision?level?indicator:bit> <PFC?feature?mode:bit> <Extended?GEA?bits> <LCS?VA?capability:bit> <P-CSCF?IP?Indicator:bit> <Spare?bits>； ...... P-CSCF?IP?Indicator 0?Mobile?station?need?not?P-CSCF?IP?address

1?Mobile?station?need?P-CSCF?IP?address

3. if carry the log-on message of old side in the Attach Request message, then MME/UPE sends former registration information (Send old registration information) is obtained the user to old side MME/UPE information;

4. old side MME/UPE sends user profile (Send user information);

5. new side MME/UPE carries out authentication (Authentication) to UE;

6. new side MME/UPE is registered to (Register MME/UPE) among the HSS;

7. delete the information (Delete UE registration information) of UE at old side MME/UPE;

8.HSS confirm the registration (Confirm Registration) of new side MME/UPE;

9.MME/UPE select an Inter AS Anchor (Selection of Intersystem MobilityAnchor GW);

10.Inter AS Anchor uses the distributing IP address of UE to carry out the configuration of IP layer, the user plane between UE and Inter ASAnchor is established, and default charging and policing rule are used, and the evolution block core net network obtains the IP address of the P-CSCF that is disposed;

As one embodiment of the present of invention, the evolution block core net network can dispose each APN (AccessPoint Name, Access Point Name) the IP address of employed P-CSCF, evolution block core net network obtain the IP address of the employed P-CSCF of UE according to the employed APN of UE.

Need to prove that the IP address configuration of P-CSCF is the configuration of evolution block core net network inside, relevant with operation strategy of Network Design and operator etc., the present invention does not limit.

11.MME/UPE and the default employed QoS of IP access bearer (Configure IP Bearer QoS) of configuration between the wireless access network of evolution;

12.MME/UPE that accepts UE adheres to request (Attach Accept), and the temporary mark of distribution UE, simultaneously MME/UPE evolution block core net network is accepted the IP address of the P-CSCF that it obtained to carry in the message to UE adhering to, and UE preserves the IP address of P-CSCF get off;

As one embodiment of the present of invention,, below comprise the example structure of accepting message of adhering to of P-CSCF IP address cell by accepting in the message to increase the IP address that P-CSCF IP address cell carries P-CSCF adhering to:

IEI (source identity)	Information Element (cell)
			Protocol?discriminator
	Skip?indicator
			Attach?accept?message?identity
	Attach?result
			Force?to?standby
	Periodic?RA?update?timer
			Radio?priority?for?SMS
	Radio?priority?for?TOM8
			Routing?area?identification
19	P-TMSI?signature
		17	Negotiated?READY?timer?value
18	Allocated?P-TMSI
		23	MS?identity
25	GMM?cause
		2A	T3302?value
8C	Cell?Notification
		4A	Equivalent?PLMNs
B-	Network?feature?support
		34	Emergency?Number?List
35	P-CSCF?IP?address

13.UE confirm to adhere to successfully (Attach Confirm);

14.UE use the IP address of the P-CSCF that obtains to carry out the IMS registration, register flow path please refer to 3GPPTS 23.228, the present invention quotes at this, repeats no more.

Need to prove that the IP address that evolution block core net network in the above-mentioned flow process obtains P-CSCF finishes in step 10, do not limit to therewith in actual the realization.

The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. a user's device attaching method is characterized in that, described method comprises:

A. core net receives the Attach Request message that subscriber equipment sends, and carries the indication information that subscriber equipment needs the IP address of call session control agent functional entity P-CSCF in the described Attach Request message;

B. core net is obtained the IP address of described call session control agent functional entity P-CSCF;

C. core net sends to adhere to subscriber equipment and accepts message, the described IP address of accepting to carry in the message described call session control agent functional entity P-CSCF of adhering to.

2. user's device attaching method as claimed in claim 1 is characterized in that, described indication information carries by the MS network capability cell MS network capability in the Attach Request message.

3. user's device attaching method as claimed in claim 1 is characterized in that, described step B comprises:

Core net is obtained the IP address of described call session control agent functional entity P-CSCF according to the employed Access Point Name APN of subscriber equipment.

4. user's device attaching method as claimed in claim 1 is characterized in that, after described step C, described method further comprises:

D. subscriber equipment is preserved the IP address of described call session control agent functional entity P-CSCF.

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