CN102025596B

CN102025596B - Processing method of route optimization, and device as well as communication system thereof

Info

Publication number: CN102025596B
Application number: CN 200910161964
Authority: CN
Inventors: 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-09-10
Filing date: 2009-09-10
Publication date: 2012-12-12
Anticipated expiration: 2029-09-10
Also published as: CN102025596A

Abstract

The present invention discloses a processing method of route optimization, and a device as well as a communication system thereof. According to the technical solution of the invention, a route optimization PDN connection for UE is established by obtaining that UE allows only one establishment of PDN connection, or obtaining that the characteristic of UE is single application, or obtaining that UE is M2M equipment, then a route optimization processing for UE data is realized to decrease system load of gateway, at the same time, only one PDN connection for UE is ensured, thereby avoiding the case that a redundant PDN connection is established for UE, and saving resources of network side.

Description

A kind of processing method of routing optimality, device and communication system

Technical field

The present invention relates to communication technical field, be specifically related to a kind of processing method, device and communication system of routing optimality.

Background technology

Routing optimality (Local Breakout) also can be referred to as local break-out, internet bypass (InternetOffload), Gi bypass (Gi Offload), local Internet protocol (IP, Internet Protocol) access (Local IP Access) or select IP transmission by-pass (Selected IP traffic offload) etc.; Its framework can be referring to Fig. 1; It mainly refers to subscriber equipment (UE, User Equipment) and directly is linked into IP network (IP Network) through access network, promptly; Upstream data passes through access network directly to IP network from UE; Perhaps, downlink data directly from the IP network to the sided access network element to UE, rather than be linked into IP network through normal route; Be that upstream data passes through access network and gateway (GW from UE; Gate Way) be linked into IP network, perhaps, downlink data from IP network through GW and access network to UE.What need explanation is, required data such as some user profile when the subscribed database among Fig. 1 mainly provides user access network.What need explanation is that IP network also can be referred to as packet data network (PDN, Packet DataNetwork).

The method of setting up route optimized path at present is following:

Existing scheme 1, UE set up default PDN and connect in adhering to (Attach) flow process; Follow-up UE initiates PDN connection request (PDN Connectivity Request) message; Carry specific APN (being that this APN only connects use for the PDN of routing optimality) in the message; The PDN whether core management network element sets up routing optimality according to this APN decision connects (that is, this PDN connection is established to the sided access network element of access network, rather than is established to GW).Perhaps,

The PDN that existing scheme 2, network side are set up normal route connects (promptly; This PDN connection is established on the GW); In the sided access network element of access network, dispose routing policy (as, which Business Stream is carried out the routing optimality function, promptly; The data flow of which filter (filter) is carried out the routing optimality function); Sided access network element is resolved the upstream data bag after the sided access network element of access network is received the upstream data bag, obtains the filter of upstream data bag, and whether sided access network element carries out the routing optimality function according to the filter decision upstream data bag of routing policy that disposes in the sided access network element and upstream data bag.

In research and practice process to prior art, inventor of the present invention finds, uses for some; Such as for Machine Type communications applications (MTC; Machine Type Communication, MTC use and refer between one or more network element or the equipment at the network communication that does not need to carry out under the artificial situation of participating in, i.e. machine (M2M; Machine to Machine) uses; Like application such as traffic control and management, factory's monitoring, remote meter readings) because its application is generally all fairly simple, therefore generally sets up a PDN and connect just enough; Can waste Internet resources so set up a plurality of PDN connections according to above-mentioned existing scheme 1; And needing the PDN of configuration routing optimality among the UE to connect the APN that uses, the PDN that needs UE can distinguish normal route connects the APN of use and the PDN of routing optimality is connected the APN that uses, and increases the complexity of UE.

It all is simple that most M2M uses; M2M equipment all has only single Business Stream; There is no need so in sided access network element, carry out upstream data bag analytical capabilities, and the parsing of carrying out the upstream data bag can influence the performance of sided access network element greatly, increase the possibility of sided access network element overload greatly according to above-mentioned existing scheme 2; Have a strong impact on thereby cause customer service to be received, and then influence user's experience.

Summary of the invention

The embodiment of the invention provides a kind of processing method, device and communication system of routing optimality, can save Internet resources.

A kind of processing method of routing optimality comprises:

Obtain subscriber equipment and only allow to set up the information that single packet data network PDN connects, or the characteristic of obtaining subscriber equipment is the information of single application, perhaps obtain the information that subscriber equipment is a machine M2M equipment;

Only allow to set up the information that single packet data network PDN connects according to the subscriber equipment that gets access to, or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that subscriber equipment is carried out routing optimality.

A kind of core management network element comprises:

First acquiring unit is used to obtain subscriber equipment and only allows to set up the information that single packet data network PDN connects, or the characteristic of obtaining subscriber equipment is the information of single application, perhaps obtains the information that subscriber equipment is a machine M2M equipment;

Processing unit; The subscriber equipment that is used for getting access to according to first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that subscriber equipment is carried out routing optimality.

A kind of communication system comprises any core management network element that the embodiment of the invention provides.

The embodiment of the invention only allows to set up a PDN connection or knows that the characteristic of subscriber equipment is single application or knows that UE is a M2M equipment through knowing UE; Decide the PDN connection of setting up routing optimality for UE; Make when the data for UE realize that route optimisation process is with the system loading that reduces gateway; Assurance only connects for UE has set up a PDN, has avoided setting up for UE the generation of the situation of redundant PDN connection, thus the resource of having saved network side; Perhaps; The indication sided access network element is carried out routing optimality; Follow-up like this sided access network element is directly issued IP network receive the upstream data of UE according to said indication after, and need not carry out the operations such as parsing of upstream data bag, simplifies the processing in the sided access network element; Thereby saved the resource of network side, improved the performance of sided access network element.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the configuration diagram of routing optimality;

Fig. 2 is the method flow diagram of the method that provided of the embodiment of the invention one;

Fig. 3 is the method flow diagram of the method that provided of the embodiment of the invention two;

Fig. 4 is the method flow diagram of the method that provided of the embodiment of the invention three;

Fig. 5 is the method flow diagram of the method that provided of the embodiment of the invention four;

Fig. 6 is the method flow diagram of the method that provided of the embodiment of the invention five;

Fig. 7 is the method flow diagram of the method that provided of the embodiment of the invention six;

Fig. 8 is the method flow diagram of the method that provided of the embodiment of the invention seven;

Fig. 9 is the structural representation of the core management network element that provides of the embodiment of the invention.

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

The embodiment of the invention provides a kind of processing method, device and communication system of routing optimality, can save Internet resources, simplifies the processing of UE; Perhaps, simplify the processing in the sided access network element, improve the performance of sided access network element, reduce the possibility of sided access network element overload, thereby increase user's experience.Below be elaborated respectively.

Embodiment one,

Present embodiment will be described from the angle of core management network element.

A kind of processing method of routing optimality comprises that obtaining UE only allows to set up the information that single packet data network PDN connects, or the characteristic of obtaining UE is the information of single application, perhaps obtains the information that UE is a machine M2M equipment; Only allow to set up the information that single packet data network PDN connects according to the UE that gets access to; Or the characteristic of UE is the information of single application; Or UE is that the information of M2M equipment is that UE carries out routing optimality and (promptly only allows to set up the information of single packet data network PDN connection according to the UE that gets access to; Or the characteristic of UE is the information of single application, or UE is that the information of M2M equipment confirms need be for UE carries out routing optimality, and is UE execution route optimisation process).As shown in Figure 2, idiographic flow can be following:

101, obtain UE and only allow to set up the information that single packet data network PDN connects, or the characteristic of obtaining UE is the information of single application, perhaps obtain the information that UE is a machine M2M equipment; Specifically can be following:

(1) obtains UE and only allow to set up the information that single packet data network PDN connects;

For example; From subscribed database, obtain the subscription data of UE, wherein, this subscription data comprises that UE allows the PDN that uses to connect number; If the PDN connection number that said UE allows to use is, know that then UE only allows to set up single packet data network PDN and connects at 1 o'clock; Perhaps,

Obtain the M2M group identification of UE; Obtain the PDN that allows use according to the M2M group identification and connect number; If the PDN connection number that allows to use is 1 o'clock, know that then UE only allows to set up single packet data network PDN and connects, specifically can comprise one of following mode:

A) configuration PDN connects a numerical table in the core management network element, comprises in this table that M2M group identification and this group allow the PDN that uses to connect number information.UE sends a message to core management network element, if UE is M2M equipment then can comprises the M2M group identification in the said message.If core management network element is found to comprise the M2M group identification in the message after receiving above-mentioned message; The PDN that core management network element uses according to the permission of this M2M group identification query configuration connects number, if the PDN that the permission of configuration is used connection number is 1 then knows that UE only allows to set up single PDN and connects; Perhaps,

B) obtain the M2M group identification of UE; From subscribed database, obtain M2M group subscription data according to this M2M group identification; Wherein, this subscription data comprises that the PDN that allows use connects number (that is, the UE in the M2M group allows the PDN that uses to connect number); If it is that the PDN that said permission is used connects number, know that then UE only allows to set up single packet data network PDN and connects at 1 o'clock.Wherein, the M2M group identification of UE can be included in the message that UE sends to core management network element.

Wherein, M2M group can comprise the group that the M2M equipment under the MTC user (MTC User) is formed, perhaps, and the group that the M2M equipment under the MTC contracted user (MTC Subscriber) is formed.

What need explanation is, the M2M group identification also can be contracted in the subscription data of UE, and core management network element obtains the subscription data of UE from subscribed database in this case, from the subscription data of UE, obtains the M2M group identification.

The M2M group identification that the embodiment of the invention is described comprises APN,, identifies M2M group according to APN that is.

(2) characteristic of obtaining UE is the information of single application;

For example, from subscribed database, obtain the subscription data of UE, wherein; This subscription data comprises the characteristic information of UE; Such as the characteristic cell MTC Feature cell of UE, if when the characteristic information of said UE is single application (single application), the characteristic of then knowing UE is single application; Perhaps,

Obtain the M2M group identification of UE, obtain characteristic information according to the M2M group identification, if when said characteristic information is single application, the characteristic of then knowing UE is single application, specifically can comprise one of following mode:

A) characteristic (feature) of configuration M2M group in the core management network element like configuration MTC property list, comprises the characteristic of M2M group identification and this group in this table.UE sends a message to core management network element, if UE is M2M equipment then can comprises the M2M group identification in the said message.If core management network element finds to comprise the M2M group identification in the message that core management network element is according to the characteristic of this M2M group identification query configuration after receiving above-mentioned message, if the characteristic of configuration is single application then knows that the characteristic of UE is single application; Perhaps,

B) obtain the M2M group identification of UE; From subscribed database, obtain M2M group subscription data according to this M2M group identification, wherein, the characteristic information that this subscription data comprises M2M group (promptly; The characteristic information of UE in the M2M group); Such as characteristic cell MTC Feature cell, if when the characteristic information of said M2M group is single application (single application), the characteristic of then knowing the UE in the M2M group is single application.Wherein, the M2M group identification of UE can be included in the message that UE sends to core management network element.

(3) obtain the information that UE is a machine M2M equipment;

For example, from subscribed database, obtain the subscription data of UE, wherein, this subscription data comprises that UE is the information of M2M, is that the information of M2M knows that UE is a M2M equipment according to UE; Wherein, UE can comprise one of following mode for the M2M facility information:

A) M2M indication (M2M Indication) cell.If comprise this M2M Indication cell in the subscription data of UE, show that then UE is a M2M equipment, otherwise, if this M2M Indication cell not in the subscription data of UE shows that then UE is non-M2M equipment.

B) non-M2M indication (non-M2M Indication) cell.If comprise this non-M2M Indication cell in the subscription data of UE, show that then UE is non-M2M equipment, otherwise, if this non-M2M Indication cell not in the subscription data of UE shows that then UE is a M2M equipment.

C) M2M sign (M2M Flag) cell.If the value of this M2M Flag cell is 1 in the subscription data of UE, show that then UE is a M2M equipment, otherwise, if the value of this M2MFlag cell is 0 in the subscription data of UE, show that then UE is non-M2M equipment.

Except the above-described subscription data that from subscribed database, obtains UE, also can obtain the M2M group identification of UE, if when comprising this M2M group identification in the M2M facility information table, know that then UE is a M2M equipment.Such as, can be following:

Configuration M2M facility information table comprises the M2M group identification in this information table in core management network element.UE sends a message to core management network element, if UE is M2M equipment then comprises the M2M group identification in the said message.If core management network element finds that the M2M group identification that comprises in the message exists after receiving above-mentioned message in M2M facility information table, then core management network element thinks that UE is a M2M equipment; Otherwise if the M2M group identification that does not have in the message to comprise in M2M group identification or the message does not exist in M2M facility information table, then core management network element thinks that UE is non-M2M equipment.

Certainly; Also can be by responding with on the UE whether indication UE is M2M equipment; Be that UE sends a message to core management network element, comprise in this message whether UE is the indication information of M2M equipment, core management network element knows according to said indication information whether UE is M2M equipment after receiving this message.Wherein, this indication information can comprise one of following mode:

A) machine indication (M2M Indication) cell.If UE is a M2M equipment, then issues in the message of core management network element and comprise this M2M Indication cell; Perhaps, if UE is non-M2M equipment, then issue in the message of core management network element not this M2M Indication cell.Core management network element is received after the message that UE sends according to whether comprising in the message that M2M Indication cell knows whether UE is M2M equipment.

B) non-machine indication (non-M2M Indication) cell.If UE is non-M2M equipment, then issues in the message of core management network element and comprise this M2M Indication cell; Perhaps, if UE is a M2M equipment, then issue in the message of core management network element not this M2M Indication cell.Core management network element is received after the message that UE sends according to whether comprising in the message that non-M2M Indication cell knows whether UE is M2M equipment.

C) machine sign (M2M Flag) cell.If UE is a M2M equipment, the value of then issuing this M2M Indication cell in the message of core management network element is 1; Perhaps, if UE is non-M2M equipment, the value of then issuing this M2M Indication cell in the message of core management network element is 0.Core management network element receives after the message that UE sends that the value according to this M2M Indication cell in the message is 1 still is 0 to know whether UE is M2M equipment.

The information of obtaining UE and be machine M2M equipment also can also comprise the M2M group identification that obtains UE; From subscribed database, obtain M2M group subscription data according to this M2M group identification; Wherein, This subscription data comprises that UE is the information (that is, the UE in this M2M group is the information of M2M) of M2M, is that the information of M2M knows that UE is a M2M equipment according to UE.Wherein, the M2M group identification of UE can be included in the message that UE sends to core management network element.

Wherein, UE can comprise one of following mode for the M2M facility information:

A) M2M indication (M2M Indication) cell.If comprise this M2M Indication cell in the subscription data of M2M group, show that then UE is a M2M equipment, otherwise, if this M2M Indication cell not in the subscription data of M2M group shows that then UE is non-M2M equipment.

B) non-M2M indication (non-M2M Indication) cell.If comprise this non-M2M Indication cell in the subscription data of M2M group, show that then UE is non-M2M equipment, otherwise, if this non-M2M Indication cell not in the subscription data of M2M group shows that then UE is a M2M equipment.

C) M2M sign (M2M Flag) cell.If the value of this M2MFlag cell is 1 in the subscription data of M2M group, show that then UE is a M2M equipment, otherwise, if the value of this M2M Flag cell is 0 in the subscription data of M2M group, show that then UE is non-M2M equipment.

102, only allow to set up the information that single packet data network PDN connects according to the UE that gets access to, or the characteristic of UE is the information of single application, or UE is that the information of M2M equipment is that UE carries out routing optimality.Specifically can for:

(1) only allowing to set up information that single packet data network PDN connects according to the UE that gets access to is that the PDN that UE sets up routing optimality connects; Perhaps,

(2) be that the information of single application is that the PDN that UE sets up routing optimality connects according to the characteristic of the UE that gets access to; Perhaps,

(3) be that the information of M2M equipment is that the PDN that UE sets up routing optimality connects according to the UE that gets access to; Perhaps,

(4) only allow to set up the information indication sided access network element execution routing optimality that single packet data network PDN connects according to the UE that gets access to, so that sided access network element is carried out route optimisation process after receiving the upstream data bag; Perhaps,

(5) characteristic according to the UE that gets access to is the information indication sided access network element execution routing optimality of single application, so that sided access network element is carried out route optimisation process after receiving the upstream data bag; Perhaps,

(6) be the information indication sided access network element execution routing optimality of M2M equipment according to the UE that gets access to, so that sided access network element is carried out route optimisation process after receiving the upstream data bag.

Wherein, The PDN that sets up routing optimality for subscriber equipment connects specifically can be the Internet protocol IP address that obtains the sided access network element that UE inserts; Send to create conversation request message or create the packet data protocol PDP Context request message sided access network element corresponding, receive returning that said sided access network element returns then and create conversational response message or create the PDP Context response message to said IP address.

The indication sided access network element is carried out routing optimality and is specially: set up at the initialization context of issuing sided access network element and ask (Initial Context Setup Request), RAB request for allocation (RABAssignment Request) or carry to set up in request (Bearer Setup Request) message to comprise indication information that said indication information indicates sided access network element to carry out routing optimality.

Wherein, the indication information in three kinds of situation (i.e. (4), (5), (6)) of indication sided access network element execution route optimisation process can comprise one of following mode:

A) routing optimality uses indication (LIPA Used Indication) cell.If comprise this LIPA Used Indication cell in the message then indicate sided access network element to carry out route optimisation process; Perhaps, if do not have this LIPA Used Flag cell in the message then indicate sided access network element not carry out route optimisation process.

B) routing optimality does not use indication (LIPA not-Used Indication) cell.If comprise this LIPAnot-Used Indication cell in the message then indicate sided access network element not carry out route optimisation process; Perhaps, if do not have this LIPA not-Used Flag cell in the message then indicate sided access network element to carry out route optimisation process.

C) routing optimality service marking (LIPA Used Flag) cell.If the value of this LIPA UsedFlag cell is 1 in the message, then show indication sided access network element execution route optimisation process; Perhaps, if the value of this LIPA Used Flag cell is 0 in the message, then shows and indicate sided access network element not carry out route optimisation process.

Except that the information that this step 101 is obtained, optional, can also obtain information that sided access network element supports routing optimality and allow UE to use any one or combination in the information of routing optimality; The information of supporting routing optimality according to sided access network element then with allow UE to use any one or combination in the information of routing optimality, and the UE characteristic that only allows to set up information that single packet data network PDN connects and UE is that information and the UE of single application is that any information in the information of M2M equipment is that PDN that UE sets up routing optimality is connected and perhaps indicates sided access network element execution route optimisation process.Promptly can be following:

(1) obtains the information that sided access network element is supported routing optimality; It is that PDN that UE sets up routing optimality connects and perhaps indicates sided access network element execution route optimisation process that the information of supporting routing optimality according to this sided access network element then and UE only allow to set up information that single packet data network PDN is connected; Perhaps; The characteristic of supporting information and the UE of routing optimality according to this sided access network element is that the information of single application is that PDN that UE sets up routing optimality is connected and perhaps indicates sided access network element execution route optimisation process; Perhaps, the information of supporting routing optimality according to this sided access network element and UE are that the information of M2M equipment is that PDN that UE sets up routing optimality is connected and perhaps indicates sided access network element execution route optimisation process.

(2) obtain the information that allows UE to use routing optimality; The information of using routing optimality according to this permission UE then and UE only allow to set up PDN that information that single packet data network PDN is connected sets up routing optimality as UE and connect or indicate sided access network element to carry out route optimisation process; Perhaps; Using the characteristic of information and the UE of routing optimality according to this permission UE is that PDN that the information of single application is set up routing optimality as UE is connected or indicates sided access network element to carry out route optimisation process; Perhaps, the PDN that the information of using routing optimality according to this permission UE and UE set up routing optimality as the information of M2M equipment as UE is connected or indicates sided access network element to carry out route optimisation process.

(3) obtain the information and the information that allows UE use routing optimality that sided access network element is supported routing optimality; Then according to this sided access network element support routing optimality information, allow UE to use information and the UE of routing optimality only to allow to set up PDN that information that single packet data network PDN is connected sets up routing optimality as UE to connect and perhaps indicate sided access network element execution route optimisation process; Perhaps; According to this sided access network element support routing optimality information, to allow UE to use the characteristic of information and the UE of routing optimality be that PDN that the information of single application is set up routing optimality as UE is connected and perhaps indicates sided access network element execution route optimisation process; Perhaps, support the information of routing optimality, the PDN that allows information that UE uses routing optimality and UE to set up routing optimality as UE to be connected according to this this sided access network element and perhaps indicate sided access network element execution route optimisation process as the information of M2M equipment.

Obtaining sided access network element supports the information of routing optimality can comprise one of following mode:

If 1 sided access network element is supported routing optimality; Then sided access network element issue core management network element message (as; Initial UE Message (initialization UE message)) Internet protocol (IP that comprises sided access network element in; Internet Protocol) address (as; The IP address of the GPRS Tunnel Protocol of sided access network element (GTP, GPRS Tunneling Protocol) chain of command), core management network element is known the information of sided access network element support routing optimality according to the IP address of said sided access network element.

2, dispose in the core management network element.The tabulation of the sided access network element of routing optimality is supported in configuration in the core management network element, if core management network element finds that sided access network element that UE inserts is in the tabulation of configuration then know that sided access network element supports the information of routing optimality; Perhaps; Configuration sided access network element allocation list in the core management network element; Comprise sided access network element sign and routing optimality support indication information in the table; Core management network element obtains the sided access network element sign that UE inserts, and according to this sign inquiry sided access network element allocation list, the routing optimality that the inquiry sided access network element is identified in this table is supported indication information; Sided access network element is supported routing optimality if routing optimality is supported the indication information indication, and then core management network element is known the information of sided access network element support routing optimality.

3, configuration in the sided access network element configuration server (the main function of this server is to carry out the configuration of sided access network element).The tabulation of the sided access network element of routing optimality is supported in configuration in the sided access network element configuration server; Core management network element is sent out inquiry request message to the sided access network element configuration server; Comprise the sided access network element sign that UE inserts in the message; If the sided access network element configuration server is found sided access network element that UE inserts in the tabulation of configuration then know that sided access network element supports the information of routing optimality, the sided access network element that the sided access network element configuration server will be known supports the information of routing optimality to issue core management network element.Perhaps,

Configuration sided access network element allocation list in the sided access network element configuration server; Comprise sided access network element sign and routing optimality support indication information in the table; Core management network element is sent out inquiry request message to the sided access network element configuration server; Comprise the sided access network element sign that UE inserts in the message; The sided access network element configuration server is according to this sign inquiry sided access network element allocation list, and the routing optimality that the inquiry sided access network element is identified in this table is supported indication information, and sided access network element is supported routing optimality if routing optimality is supported the indication information indication; Then the sided access network element configuration server is known the information of sided access network element support routing optimality, and the sided access network element that the sided access network element configuration server will be known supports the information of routing optimality to issue core management network element.

Obtain and allow UE to use the information of routing optimality can comprise one of following mode:

From subscribed database, obtain the subscription data of UE, wherein, this subscription data comprises the information that allows to use routing optimality; Wherein, allow to use the information of routing optimality can comprise one of following mode:

A) routing optimality allows indication (LIPA Allowed Indication) cell.If comprise this indication information element in the subscription data of UE, then show and allow to use routing optimality, otherwise, if this indication information element not in the subscription data of UE then shows not allow to use routing optimality.

B) routing optimality does not allow indication (LIPA not Allowed Indication) cell.If comprise this indication information element in the subscription data of UE, then show not allow to use routing optimality, otherwise, if this indication information element not in the subscription data of UE then shows to allow to use routing optimality.

C) routing optimality allows sign (LIPA Allowed Flag) cell.If the value of this cell is 1 in the subscription data of UE, then show to allow to use routing optimality, otherwise, if the value of this cell is 0 in the subscription data of UE, then show not allow to use routing optimality.

Perhaps,

Obtain the M2M group identification of UE, from subscribed database, obtain M2M group subscription data according to this M2M group identification, wherein, this subscription data comprises the information (that is, allowing the UE in the M2M group to use routing optimality) that allows to use routing optimality.Wherein, the information that allows the use routing optimality is specifically referring to top description.Wherein, the M2M group identification of UE can be included in the message that UE sends to core management network element;

Perhaps,

Configuration allows the tabulation of the M2M group of use routing optimality in the core management network element; Core management network element obtains the M2M group identification of UE, if the M2M group identification that core management network element is found UE is in the tabulation of configuration then know the information that allows UE to use routing optimality; Perhaps; Configuration M2M group allocation list comprises in the table that M2M group identification and routing optimality allow indication information in the core management network element, and core management network element obtains the M2M group identification of UE; According to this sign inquiry M2M group allocation list; The routing optimality of inquiry M2M group identification in this table allows indication information, if routing optimality allows the indication information indication to allow UE to use routing optimality, then core management network element is known the information that allows UE to use routing optimality; Wherein, the M2M group identification of UE can be included in the message that UE issues core management network element or core management network element obtains the subscription data of UE from subscribed database, from the subscription data of UE, obtains the M2M group identification.

Configuration in the M2M group configuration server (the main function of this server is to carry out the configuration of M2M group).Configuration allows to use the M2M group list of routing optimality in the M2M group configuration server; Core management network element is sent out inquiry request message to M2M group configuration server; The M2M group identification that comprises UE in the message; If the M2M group identification that M2M group configuration server is found UE is in the M2M group list of configuration then know and allow M2M group to use routing optimality (promptly; UE use routing optimality in the permission M2M group) information, the permission that M2M group configuration server will be known uses the information of routing optimality to issue core management network element.

Perhaps,

Configuration M2M group allocation list in the M2M group configuration server; Comprise in the table that M2M group identification and routing optimality allow indication information; Core management network element is sent out inquiry request message to M2M group configuration server, comprises the M2M group identification of UE in the message, and M2M group configuration server is according to this sign inquiry M2M group allocation list; The routing optimality of inquiry M2M group identification in this table allows indication information; If routing optimality allows indication information to indicate M2M to allow to use routing optimality (that is, allowing the UE in the M2M group to use routing optimality), then M2M group configuration server knows that permission M2M group uses routing optimality (promptly; UE use routing optimality in the permission M2M group) information, the permission that M2M group configuration server will be known uses the information of routing optimality to issue core management network element.

In order to guarantee that only setting up a PDN connects; Obtaining the information that UE only allows to set up single packet data network PDN connection; Or the characteristic of obtaining UE is the information of single application; Perhaps obtain after the information that UE is a machine M2M equipment, after setting up a PDN connection (PDN of routing optimality connects or normal PDN connects), can also comprise that the PDN that refuses other connects the request of foundation; Also just say; If receive the PDN connection request that UE sends this moment or activate the request of packet data protocol hereinafter (Activate PDP context Request, wherein, PDP is Packet Data Protocol; Be packet data protocol) message; Then core management network element can be refused, and for example, can return PDN connection refusal (PDNConnectivity Reject) message or PDP context activating refusal (Activate PDP ContextReject) message to UE.

Obtaining the information that UE only allows to set up single PDN connection; Or the characteristic of obtaining UE is the information of single application; Perhaps obtain after the information that UE is a M2M equipment; The characteristic that only allows to set up information that single PDN connects or UE according to the UE that obtains is that the information of single application or information that UE is M2M equipment are that the PDN that UE sets up routing optimality connects; Follow-up like this sided access network element is directly issued IP network with upstream data after receiving upstream data in the PDN of the routing optimality connection, perhaps IP network is issued sided access network element with downlink data through the PDN connection of routing optimality, and sided access network element is issued UE again.Perhaps,

Obtaining the information that UE only allows to set up single PDN connection; Or the characteristic of obtaining UE is the information of single application; Perhaps obtain after the information that UE is a M2M equipment; The characteristic that only allows to set up information that single PDN connects or UE according to the UE that obtains is that the information of single application or information indication sided access network element that UE is M2M equipment are carried out routing optimality; Follow-up like this sided access network element is directly issued IP network receive the upstream data of UE according to said indication after, and need not carry out the operations such as parsing of upstream data bag.

In addition; Optional; Obtaining the information that subscriber equipment only allows to set up single PDN connection; Or the characteristic of obtaining subscriber equipment is the information of single application, also comprises before perhaps obtaining subscriber equipment and be the information of M2M equipment: receive update inquiry information or service request information that subscriber equipment sends.

Obtain subscriber equipment and only allow to set up the information that single PDN connects; Or the characteristic of obtaining subscriber equipment is the information of single application; Also comprise after perhaps obtaining subscriber equipment and be the information of M2M equipment: know that sided access network element changes or PDN that old PDN is connected to normal route connects; And only allow to set up the information that single PDN connects according to the subscriber equipment that obtains; Or the characteristic of obtaining subscriber equipment is the information of single application, and when the information of perhaps obtaining subscriber equipment and be M2M equipment was confirmed as PDN that UE sets up routing optimality and connected, the indication subscriber equipment was initiated attachment flow.That is, an alternative embodiment of the invention, can for:

Receive update inquiry information or service request information that UE sends;

Know that sided access network element changes or old PDN is connected to the PDN connection of normal route and only allow to set up the information that single packet data network PDN connects according to subscriber equipment; Or the characteristic of obtaining subscriber equipment is the information of single application; Perhaps obtain the information that subscriber equipment is a machine M2M equipment; When confirming as PDN that UE sets up routing optimality and connecting, indication UE initiates attachment flow;

After UE initiates attachment flow; Network side only allows to set up the information that single packet data network PDN connects according to the subscriber equipment that gets access to; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that subscriber equipment is carried out routing optimality.

What need explanation is; The described core management network element of the embodiment of the invention can comprise Mobility Management Entity (MME; Mobility Management Entity), the mobile management network element in service universal grouping wireless business supporting node (SGSN, Serving GPRS Supporting Node) or non-third generation partner program (3GPP, the 3rd Generation Partnership Project) network; Such as; Evolution packet data gateway (EPDG, Evolved Packet Data Gateway) in the WLAN (WLAN, Wireless Local Area Network), micro-wave access global inter communication (Wimax; WorldwideInteroperability for Microwave Access) access business network gateway (the ASN GW in the network; Access Service Network Gateway), code division multiple access inserts IAD (AGW, Access Gateway) or the HRPD (HRPD in (CDMA, Code DivisionMultiple Access) network; High Rate Packet Data) network elements such as (HSGW, HRPD Serving Gateway) of the high-speed packet data service gateway in the network.

UE can comprise common terminal equipment or M2M equipment etc., and wherein, M2M equipment also can be referred to as Machine Type communication apparatus (MTC Device, Machine Type Communication Device).

The sided access network element of access network comprises the UMTS Terrestrial radio access network (E-UTRAN of evolution; Evolved UMTS Terrestrial Radio Access Network) evolution base station (eNodeB) network element in the network, insert the side gateway, operate in the Home eNodeB (HeNB of E-UTRAN frequency spectrum; Home evolvedNodeB) network element or family insert side gateway (HeNB GW) network element; Base station in the UTRAN network (NodeB) network element, radio network controller (RNC; Radio Network Controller) network element, insert the side gateway, operate in Home eNodeB (HNB, Home NodeB) network element or the HNB GW of UTRAN frequency spectrum, perhaps; Relevant sided access network element in the non-3GPP network (like, non-3GPP networks such as CDMA, Wimax, WLAN or HRPD).

GW comprises gateway packet wireless business support node (GGSN, Gateway GPRS SupportNode), gateway (SGW, Serving GW) or grouped data network gateway network elements such as (PDN GW, Packet Data Network Gateway).

Subscribed database can comprise attaching position register (HLR, Home Location Register) or home subscribed services device network elements such as (HSS, Home Subscriber Service).

IP network comprises Internet network, enterprise network or M2M application network (like, MTC Server) etc.

By on can know; The embodiment of the invention only allows to set up through obtaining UE that a PDN connects or the characteristic of obtaining subscriber equipment is single application or to obtain UE be M2M equipment; Decide the PDN connection of setting up routing optimality for UE; Make that when the data for UE realize that route optimisation process is with the system loading that reduces gateway assurance only connects for UE has set up a PDN, avoided setting up the generation of the situation of redundant PDN connection for UE; Thereby saved the resource of network side, simplified the processing of UE.Perhaps, only allow to set up through obtaining UE that a PDN connects or the characteristic of obtaining UE is single application or to obtain UE be M2M equipment, thereby decision indication sided access network element is carried out route optimisation process; Sided access network element is directly carried out route optimisation process (that is, sided access network element is directly issued PDN with the upstream data bag, rather than issues GW) after receiving the upstream data bag like this; Both realize the processing of routing optimality of the data of UE, realized the processing of the bypass (that is, not passing through Gateway Network Element) of the data of UE; Reduced the system loading of Gateway Network Element; Need not carry out the parsing of upstream data bag again owing to sided access network element, thereby simplify the processing in the sided access network element, improve the performance of sided access network element; Reduce the possibility of sided access network element overload, thereby increase user's experience.

Embodiment two,

According to embodiment one described method, below will elaborate for example.

Present embodiment will be connected to example and describe from the Attach flow process, setting up PDN, and as shown in Figure 3, idiographic flow can be following:

201, UE sends the sided access network element that attach request (Attach Request) message is given access network;

Optional, can comprise in the Attach Request message whether UE is the indication information of M2M equipment, and said indication information is specifically handled referring to the description among the embodiment one.

Alternatively, can also comprise the M2M group identification in the Attach Request message.

202, sided access network element sends initialization UE message (Initial UE Message) and gives core management network element, comprises the Attach Request message that UE sends in this initialization UE message;

Alternatively, carry Internet protocol (IP, the Internet Protocol) address of GPRS Tunnel Protocol (GTP, the GPRSTunneling Protocol) chain of command of sided access network element in the initialization UE message.

203, after core management network element receives Attach Request message; If there is not the subscription data of effective UE in the core management network element; Then core management network element obtains the subscription data of UE from subscribed database; As, core management network element sends and upgrades position requests (Update Location Request) message to subscribed database; Subscribed database returns and upgrades location confirmation (Update Location Ack) message to core management network element, carries the subscription data of UE in the message, comprises APN (APN, Access Point Name) information in the subscription data of UE.If the PDN of routing optimality connects and to be connected the APN that uses with the PDN of normal route is different, the PDN that then comprises routing optimality in the subscription data of UE connect the APN that uses and normally the PDN of route be connected the APN of use.Certainly, can also comprise in the subscription data of UE that UE allows the PDN that uses to connect the number cell, perhaps; The M2M group identification can be comprised, perhaps, the characteristic of UE can be comprised; Perhaps, can comprise that UE is the M2M facility information, perhaps; Can also comprise whether allowing UE to use routing optimality information, or the like.

What need explanation is, if the subscription data of effective UE has been arranged in the core management network element, then core management network element obtain preservation UE subscription data and need not to obtain in the subscribed database subscription data of UE.

If 204 core management network elements get access to UE and only allow to set up single PDN link information; Perhaps, the characteristic that core management network element gets access to UE is the information of single application, perhaps; Core management network element gets access to the information that UE is a M2M equipment; Then core management network element is confirmed as the PDN that PDN that UE sets up is connected to routing optimality and is connected, otherwise core management network element is that the PDN that PDN that UE sets up is connected to normal route connects.Specifically handle referring to the description among the embodiment 1.

Alternatively; Core management network element can obtain sided access network element and whether support routing optimality information, and to support routing optimality information and said UE only to allow to set up single PDN link information according to said sided access network element be that the PDN that UE sets up routing optimality is connected to core management network element then; Perhaps, core management network element supports that according to said sided access network element the characteristic of routing optimality information and UE is that single application message is that the PDN that UE sets up routing optimality is connected; Perhaps, core management network element supports that according to said sided access network element routing optimality information and said UE are that the PDN that UE sets up routing optimality is connected for the M2M facility information; Otherwise the PDN that core management network element is set up normal route connects.Specifically handle referring to the description among the embodiment 1.

Alternatively, core management network element can obtain whether allow UE use routing optimality information, and core management network element is connected as the PDN that UE sets up routing optimality according to allowing UE to use routing optimality and said UE only to allow to set up single PDN link information then; Perhaps, core management network element is that single application message is connected as the PDN that UE sets up routing optimality according to allowing UE to use the characteristic of routing optimality and UE; Perhaps, core management network element is according to allowing UE to use routing optimality to be connected as the PDN that UE sets up routing optimality as the M2M facility information with said UE; Otherwise the PDN that core management network element is set up normal route connects.Specifically handle, repeat no more at this referring to the description among the embodiment one.

Alternatively; Whether core management network element can obtain and allow UE to use routing optimality information and obtain sided access network element and whether support routing optimality information, and core management network element is according to allowing UE to use routing optimality, sided access network element support routing optimality only to allow to set up single PDN link information with said UE and be connected as the PDN that UE sets up routing optimality then; Perhaps, core management network element is according to allowing UE to use routing optimality, sided access network element to support that the characteristic of routing optimality and UE is that single application message is connected as the PDN that UE sets up routing optimality; Perhaps, core management network element is according to allowing UE to use routing optimality, sided access network element to support that routing optimality is connected as the PDN that UE sets up routing optimality as the M2M facility information with said UE; Otherwise the PDN that core management network element is set up normal route connects.Specifically can repeat no more at this referring to embodiment one.

Connect if the definite PDN that sets up of core management network element is connected to the PDN of routing optimality, then core management network element obtains the IP address of the sided access network element of UE access, and initiation PDN connection creation facilities program (CFP) is set up PDN and is connected to the corresponding sided access network element in this IP address.Core management network element can send creates conversation request (Create Session Request) message to the sided access network element that UE inserts, and the PDN that comprises routing optimality in the message connects the APN that uses.Return after the resource that the PDN of sided access network element establishment routing optimality connects and create conversational response (Create Session Response) message to core management network element.

What need explanation is, to be connected the APN that uses with the PDN of normal route be different if the PDN of routing optimality connects, and the APN that then core management network element is selected in this step is the APN of the PDN connection use of routing optimality.

The IP address that core management network element obtains the sided access network element of UE access can comprise one of following mode:

1, the IP address that in sided access network element is issued the Initial UE Message of core management network element, comprises sided access network element.

2, dispose in the core management network element.The IP address of configuration sided access network element in the core management network element, the sided access network element query configuration table that core management network element inserts according to UE, the IP address that obtains sided access network element.

3, configuration in the sided access network element configuration server (the main function of this server is to carry out the configuration of sided access network element).The IP address of configuration sided access network element in the sided access network element configuration server; Core management network element is sent out inquiry request message to the sided access network element configuration server; Comprise the sided access network element sign that UE inserts in the message; The sided access network element configuration server identifies the query configuration table according to sided access network element, the IP address that obtains sided access network element, and the sided access network element configuration server is issued core management network element with the IP address information of the sided access network element that obtains.

If core management network element is confirmed as the PDN that PDN that UE sets up is connected to normal route and is connected in 205 steps 204; Then core management network element selects APN that the PDN of normal route connect to use (promptly; Default APN); Carry out the GW selection function according to this APN, select the PDN of normal route to connect the GW that uses, initiate PDN connection creation facilities program (CFP) then and set up the GW that PDN is connected to selection.Core management network element can send creates conversation request (Create Session Request) message to the GW that selects, and the PDN that comprises normal route in the message connects the APN that uses.GW returns and creates conversational response (Create Session Response) message to core management network element, sets up the method for the PDN connection of normal route and specifically can continue to use existing scheme, repeats no more at this.

What need explanation is, to be connected the APN that uses with the PDN of normal route be different if the PDN of routing optimality connects, and then core management network element is selected the APN of the PDN connection use of normal route in this step.

206, core management network element sends and adheres to acceptance (Attach Accept) message to UE.

What need explain in addition, is only to allow to set up single PDN link information if core management network element obtains UE; Perhaps; Core management network element knows that the characteristic of UE is single application, and perhaps, core management network element knows that UE is a M2M equipment; Then the core management network element PDN that in the Attach flow process, sets up routing optimality connects or after the PDN of normal route connects; The PDN that refuses other is connected the request of foundation, that is, if core management network element is received PDN connection request (PDN Connectivity Request) message or PDP context activating request (Activate PDP context Request) message that UE sends again; Then core management network element will be refused the request of UE, return PDN connection refused message or PDP context activating refuse information to UE.Guarantee so only to connect for UE sets up a PDN.

By on can know that through knowing that UE only allows to set up PDN and connects, the characteristic of perhaps knowing subscriber equipment is single application in the present embodiment; Know that perhaps UE is a M2M equipment, connect, both realized the processing of routing optimality of the data of UE thereby confirm as the PDN that PDN that UE sets up is connected to routing optimality; Realize the processing of the bypass (that is, not passing through gateway) of the data of UE, reduced the system loading of gateway; For only having set up a PDN, UE connects again; Avoided connecting for this UE sets up redundant PDN, the resource of having saved network side, simultaneously; The APN that the APN that the PDN connection of routing optimality is used or the PDN of normal route connect use is selected by core management network element; Do not need the PDN of configuration routing optimality among the UE to connect the APN that uses, the PDN that does not also need UE can distinguish normal route connects the APN of use and the PDN of routing optimality is connected the APN that uses, and simplifies the processing of UE.

Embodiment three,

The difference of present embodiment and embodiment two is, the PDN among the embodiment two connects and is based upon in the Attach flow process, and present embodiment will be connected to example and describe after the Attach flow process, to set up PDN.Specifically be to connect (UE Requested PDN connectivity) program or in PDP context activation (PDP Context Activation) program, set up PDN at the PDN of UE request to connect.As shown in Figure 4, idiographic flow can be following:

Step 301 to step 303 is identical with step 201 to step 203 among the embodiment two, and step 304 is identical with step 206 among the embodiment two, repeats no more at this.

305, UE transmission PDN connection request (PDN Connectivity Request) message or PDP context activating request (Activate PDP context Request) message are to core management network element.

If 306 core management network elements get access to UE and only allow to set up single PDN link information; Perhaps to get access to the characteristic of UE be single application to core management network element; Perhaps, it is M2M equipment that core management network element gets access to UE, and then core management network element is confirmed as the PDN that PDN that UE sets up is connected to routing optimality and connected; Otherwise core management network element is the PDN connection that the PDN of UE foundation is connected to normal route.Specifically handle referring to the description among the embodiment 1.

Connect if the definite PDN that sets up of core management network element is connected to the PDN of routing optimality, then core management network element obtains the IP address of the sided access network element of UE access, and initiation PDN connection creation facilities program (CFP) is set up PDN and is connected to the corresponding sided access network element in this IP address.Core management network element can send to be created conversation request message or creates PDP Context request (Create PDP Context Request) message to the sided access network element that UE inserts, and the PDN that comprises routing optimality in the message connects the APN that uses.Sided access network element is created to return after the resource that the PDN of routing optimality connects and is created conversational response message or create PDP Context response (Create PDP Context Response) message to core management network element.

Core management network element obtains the IP address of the sided access network element that UE inserts referring to the description among the embodiment two.

If core management network element is confirmed as the PDN that PDN that UE sets up is connected to normal route and is connected in 307 steps 306; Then core management network element selects the PDN of normal route to connect the APN that uses; Carry out the GW selection function according to this APN; Select the PDN of normal route to connect the GW that uses, initiate PDN connection creation facilities program (CFP) then and set up the GW that PDN is connected to selection.Core management network element sends to be created conversation request message or creates PDP Context request (Create PDP Context Request) message to the GW that selects, and the PDN that comprises normal route in the message connects the APN that uses.GW returns and creates conversational response message or create PDP Context response (Create PDP Context Response) message to core management network element.

What need explain in addition, is only to allow to set up single PDN link information if core management network element obtains UE; Perhaps; Core management network element knows that the characteristic of UE is single application, and perhaps, core management network element knows that UE is a M2M equipment; Then core management network element connects the PDN that will refuse other after perhaps the PDN of a normal route connects at the PDN that sets up a routing optimality for UE and connects the request of foundation; That is, core management network element is received the request that will refuse UE after PDN connection request message that UE sends or the PDP context activating request message again, returns PDN connection refused message or PDP context activating refuse information and arrives UE.Guarantee so only to connect for UE sets up a PDN.

Embodiment four,

Present embodiment describe to upgrade the processing in request or the services request flow process, with implement two different be that in the present embodiment, what UE initiated is to upgrade request or services request.As shown in Figure 5, idiographic flow can be following:

401, UE sends and upgrades the sided access network element (being referred to as the target sided access network element) of asking (Update Request) message or services request (ServiceRequest) message to give the target access network network; What need explanation is that the access side net in the present embodiment all refers to the target sided access network element.

Alternatively, can comprise in update inquiry information or the service request information whether UE is the indication information of M2M equipment, and the concrete processing of this indication information can be referring to the description among the embodiment one.

Alternatively, comprise the M2M group identification in update inquiry information or the service request information.

Renewal request in this step can be tracing section updating request (TAU Request; Wherein, TAU is Tracking Area Update, i.e. tracking area) message or be that (RAU Request is wherein in the Routing Area Update request; RAU is Routeing Area Update, i.e. route district) message etc.

402, the target sided access network element sends initialization UE message (Initial UE Message) and gives core management network element, comprises renewal request (Update Request) message or service request information that UE sends in the said initialization UE message.Alternatively, carry the IP address of target sided access network element in the initialization UE message.

403, after core management network element receives update inquiry information or service request information; If there is not the subscription data of effective UE in the core management network element; Then core management network element obtains the subscription data of UE from subscribed database; As, core management network element sends and upgrades position requests (Update Location Request) message to subscribed database; Subscribed database returns and upgrades location confirmation (Update Location Ack) message to core management network element, carries the subscription data of UE in the message, can comprise APN information in the subscription data of UE.Certainly, can also comprise in the subscription data of UE that UE allows the PDN that uses to connect the number cell; Perhaps, can comprise the M2M group identification; The characteristic that perhaps, can comprise UE; Perhaps, can comprise that UE is the M2M facility information; Perhaps, can comprise whether allowing UE to use routing optimality information, or the like.

If 404 core management network elements confirm as that PDN that UE sets up routing optimality connects and core management network element is found sided access network element change (find such as, core management network element the IP address of GTP chain of command of IP address and source sided access network element of GTP chain of command of target sided access network element different or the like); Perhaps, if core management network element confirms as that PDN that UE sets up routing optimality connects and core management network element finds that the PDN that old PDN is connected to normal route connects (find such as, core management network element that old PDN connects and be established to GW); Perhaps; If core management network element confirms as that UE sets up that the normal PDN that optimizes connects and core management network element find the PDN that old PDN is connected to routing optimality connect (such as; Core management network element finds that old PDN connection is established to sided access network element), then core management network element indication UE initiates the Attach flow process.Core management network element sends and upgrades refusal (Update Reject) message or service-denial (Service Reject) message or detach request (Detach Request) message to UE; Wherein, These message can comprise that indication information is with indication UE initiation Attach flow process; Such as, the Cause value in the message is set to " Re-Attach ".

The PDN that the PDN that core management network element confirm to be set up is connected to routing optimality connect still be the processing that connects of the PDN of normal route with the processing among the embodiment two, repeat no more at this.

Step 405 to 407 with the step 201 among the embodiment two to 203, be not described in detail at this.

408, core management network element is initiated deletion PDN connection flow process to delete old PDN connection (also can be referred to as source (source) PDN connects);

If being connected to the PDN of routing optimality, old PDN connects; Then core management network element send deletion conversation request (Delete Session Request) message or delete PDP Context request (Delete PDPContext Request) message to the source sided access network element, the source sided access network element returns deletion conversational response (Delete Session Response) message or deletes PDP Context response (Delete PDP ContextResponse) message and arrive core management network element then.

If being connected to the PDN of normal route, old PDN connects; Then core management network element sends deletion conversation request (Delete Session Request) message or deletes PDP Context request (Delete PDPContext Request) message to GW, and GW returns deletion conversational response (Delete Session Response) message or deletes PDP Context response (Delete PDP Context Response) message to core management network element.

Step 409,410,411 is not described in detail at this with the step 204 among the embodiment two, 205,206.

By on can know that core management network element indicates UE to initiate the Attach flow process in the present embodiment in refresh routine or services request program, the old PDN of deletion connects in the Attach flow process; Newly-built new PDN connects, and has both solved that the old PDN connection of deletion causes UE to be in released state in renewal (Update) program or the services request program, thereby causes flow process unusual; Can't connect by newly-built new PDN, influence the problem of user experience, again through knowing that UE only allows to set up a PDN and connects; The characteristic of perhaps knowing subscriber equipment is single application, knows that perhaps UE is a M2M equipment, and the PDN that confirms as UE foundation is connected to the PDN connection of routing optimality; Thereby promptly realized the processing of routing optimality of the data of UE; Reduced the system loading of gateway, connected for UE has only set up a PDN again, avoided connecting for this UE sets up redundant PDN; Saved the resource of network side; Simultaneously, the APN that the APN that the PDN of routing optimality connection is used or the PDN of normal route connect use is selected by core management network element, does not need the PDN of configuration routing optimality among the UE to connect the APN that uses; The PDN that does not also need UE can distinguish normal route connects the APN of use and the PDN of routing optimality is connected the APN that uses, and simplifies the processing of UE.

Embodiment five,

The difference of present embodiment and embodiment four is; Newly-built PDN connection among the embodiment four is based upon in the Attach flow process; And present embodiment will be connected to example and describe after the Attach flow process, to set up PDN, specifically can or in the PDP context activation program, set up newly-built PDN at the PDN linker of UE request and connect.

Step 501 to 508 with the step 401 of embodiment four to 408, step 509 with the step 405 of embodiment four to 407, step 510 to 512 with the step 305 among the embodiment three to 307, be not described in detail at this.

By on can know that core management network element indication UE in upgrading requestor or services request program initiates the Attach flow process in the present embodiment, the old PDN of deletion connects in the Attach flow process; Newly-built new PDN connects, and has both solved renewal (Update) program or has served that the old PDN connection of deletion causes UE to be in released state in the refresh routine, thereby caused flow process unusual; Can't connect by newly-built new PDN, influence the problem of user experience, again through knowing that UE only allows to set up a PDN and connects; The characteristic of perhaps knowing subscriber equipment is single application, knows that perhaps UE is a M2M equipment, and the PDN that confirms as UE foundation is connected to the PDN connection of routing optimality; Thereby promptly realized the processing of routing optimality of the data of UE; Reduced the system loading of gateway, connected for UE has only set up a PDN again, avoided connecting for this UE sets up redundant PDN; Saved the resource of network side; Simultaneously, the APN that the APN that the PDN of routing optimality connection is used or the PDN of normal route connect use is selected by core management network element, does not need the PDN of configuration routing optimality among the UE to connect the APN that uses; The PDN that does not also need UE can distinguish normal route connects the APN of use and the PDN of routing optimality is connected the APN that uses, and simplifies the processing of UE.

Embodiment six,

According to embodiment one described method, it is that example is elaborated that present embodiment will indicate sided access network element to carry out route optimisation process in the Attach flow process with core management network element.As shown in Figure 7, idiographic flow can be following:

601, UE sends the sided access network element that Attach Request message or update inquiry information or service request information are given access network.

Alternatively, can comprise in Attach Request message or update inquiry information or the service request information whether UE is the indication information of M2M equipment, and wherein, the concrete processing of this indication information can be referring to the description among the embodiment one.

Alternatively, can comprise the M2M group identification in Attach Request message or update inquiry information or the service request information.

Renewal request in this step can or be a Routing Area Update request message etc. for the tracing section updating request message.

602, after sided access network element receives this Attach Request message or update inquiry information or service request information; Send initialization UE message (Initial UE Message) to core management network element, comprise Attach Request message or update inquiry information or service request information that UE sends in the said initialization UE message.Alternatively, carry the IP address of sided access network element in the initialization UE message.

603, after core management network element receives Attach Request message or update inquiry information or service request information; If there is not the subscription data of effective UE in the core management network element; Then core management network element obtains the subscription data of UE from subscribed database; Specifically can repeat no more at this referring to front embodiment.

If 604 hereto UE also do not set up default PDN and connect; Then core management network element is selected default APN; Carry out the GW selection function according to this APN, select PDN to connect the GW that uses, initiate the PDN connection building process then and set up the GW that PDN is connected to selection.Core management network element sends creates conversation request message to GW.GW returns and creates conversational response message to core management network element.

605, core management network element sends the initialization context and sets up request (Initial Context SetupRequest) message or RAB request for allocation (RAB Assignment Request) message to sided access network element, and sided access network element can return the initialization context and set up response (Initial Context SetupResponse) message or RAB assignment response (RAB Assignment Response) message to core management network element.

Whether the core management network element decision indicates sided access network element to carry out route optimisation process; If core management network element decision indication sided access network element execution route optimisation process, then the initialization context is set up and is comprised in request or the RAB allocation request message that indication information is with indication sided access network element execution route optimisation process.Concrete decision and indication information are referring to the description among the embodiment one.

If sided access network element is received the indication information of carrying out route optimisation process from core management network element; Then after sided access network element is received the upstream data bag of UE, carry out route optimisation process, directly the upstream data bag is issued the IP network network and need not the upstream data bag is issued GW; If sided access network element is not received the indication information of carrying out route optimisation process from core management network element; Then after sided access network element is received the upstream data bag of UE, issue GW or sided access network element and resolve the upstream data bag; Obtain the filter of upstream data bag; Whether sided access network element carries out the routing optimality function according to the filter decision upstream data bag of routing policy that disposes in the sided access network element and upstream data bag, and promptly this packet is directly issued IP network and still issued IP network through GW.

606, core management network element sends to adhere to and accepts message or upgrade to accept message or service and accept message and give UE.

What need explain in addition, is only to allow to set up single PDN link information if core management network element obtains UE; Perhaps; Core management network element knows that the characteristic of UE is single application, and perhaps, core management network element knows that UE is a M2M equipment; Then core management network element is being set up the PDN connection foundation request that will refuse other after a PDN connects for UE; That is, core management network element is received the request that will refuse UE after PDN connection request message that UE sends or the PDP context activating request message again, returns PDN connection refused message or PDP context activating refuse information and arrives UE.Guarantee so only to connect for UE sets up a PDN.

By on can know, in the present embodiment through knowing that UE only allows to set up a PDN and connects or know that the characteristic of UE is single application or knows that UE is a M2M equipment, decides the indication sided access network element to carry out route optimisation process; Like this, sided access network element just can directly be carried out route optimisation process after receiving the upstream data bag, has both realized the processing of routing optimality of the data of UE; Reduced the system loading of gateway, and, because sided access network element need not carried out the parsing of upstream data bag; So can simplify the processing in the sided access network element, improve the performance of sided access network element, reduce the possibility of sided access network element overload; Thereby increase user's experience; Again because for UE has only set up a PDN connection, so avoided connecting the resource of having saved network side for UE sets up redundant PDN

Embodiment seven,

The difference of present embodiment and embodiment six is; Core management network element indicates sided access network element to carry out route optimisation process in the Attach flow process in embodiment six, and indication sided access network element execution route optimisation process will be that example describes in the flow process and present embodiment will perhaps be set up in the PDP context activation program or in the carrying that network side is initiated with the PDN linker that core management network element is asked at UE.As shown in Figure 8, idiographic flow can be following:

Step 701 to 703 with the step 601 among the embodiment six to 603, be not described in detail at this.

704, core management network element sends to adhere to and accepts message or upgrade acceptance (Update Access) message to UE.

705, UE transmission PDN connection request message or PDP context activating request message are to core management network element.

706, core management network element is selected the APN of UE use, carries out the GW selection function according to this APN, selects PDN to connect the GW that uses, and initiates PDN connection creation facilities program (CFP) then and sets up the GW that PDN is connected to selection.Core management network element sends to be created conversation request message or creates the PDP Context request message to GW.GW returns and creates conversational response message or create the PDP Context response message to core management network element.

707, core management network element transmission carrying is set up and is asked (Bearer Setup Request) message or RAB request for allocation (RAB Assignment Request) message to sided access network element, and sided access network element can return carrying foundation response (Bearer Setup Response) message or RAB assignment response (RAB Assignment Response) message arrives core management network element.

Core management network element determines whether to indicate sided access network element to carry out route optimisation process.If the definite indication of core management network element sided access network element is carried out route optimisation process, then carrying is set up and is comprised in request message or the RAB allocation request message that indication information is with indication sided access network element execution route optimisation process.Concrete definite method and indication information are referring to the description among the embodiment one.

If sided access network element is received the indication information of carrying out route optimisation process from core management network element; Then behind the upstream data bag of receiving UE in the sided access network element, carry out route optimisation process, directly the upstream data bag is issued the IP network network and need not the upstream data bag is issued GW; If sided access network element is not received the indication information of carrying out route optimisation process from core management network element; Then after sided access network element is received the upstream data bag of UE, issue GW or sided access network element and resolve the upstream data bag; Obtain the filter of upstream data bag; Whether sided access network element carries out the routing optimality function according to the filter decision upstream data bag of routing policy that disposes in the sided access network element and upstream data bag, and soon this packet is directly issued IP network and still issued IP network through GW.

708, GW sends to create and carries request (Create Bearer Request) message to core management network element.

709, the processing of this step is not described in detail with the processing of step 707 here

710, core management network element returns to create and carries response (Create Bearer Response) message to GW.

What need explanation is; If core management network element obtains UE and only allows to set up single PDN link information, perhaps, core management network element knows that the characteristic of UE is single application; Perhaps; Core management network element knows that UE is a M2M equipment, and then core management network element is being set up the PDN connection foundation request that will refuse other after a PDN connects for UE, promptly; Core management network element is received the request that will refuse UE after PDN connection request message that UE sends or the PDP context activating request message again, returns PDN connection refused message or PDP context activating refuse information and arrives UE.Guarantee so only to connect for UE sets up a PDN.

What need explanation is; A part among Fig. 8 (is that step 705 is to 707; See the frame of broken lines part among Fig. 8) and B part (be step 708 to 710, see the frame of broken lines part among Fig. 8) between processing sequential relationship successively not, and these two parts to handle also be independently; That is, can in same program, not handle.

By on can know, in the present embodiment through knowing that UE only allows to set up a PDN and connects or know that the characteristic of UE is single application or knows that UE is a M2M equipment, decides the indication sided access network element to carry out route optimisation process; Like this, sided access network element just can directly be carried out route optimisation process after receiving the upstream data bag, has both realized the processing of routing optimality of the data of UE; Reduced the system loading of gateway, and, because sided access network element need not carried out the parsing of upstream data bag; So can simplify the processing in the sided access network element, improve the performance of sided access network element, reduce the possibility of sided access network element overload; Thereby increase user's experience; Again because for UE has only set up a PDN connection, so avoided connecting the resource of having saved network side for UE sets up redundant PDN.

Embodiment eight,

In order to implement above method better, the present invention also correspondingly provides a kind of core management network element, and is as shown in Figure 9, and this core management network element comprises first acquiring unit 801 and processing unit 802;

First acquiring unit 801 is used to obtain subscriber equipment and only allows to set up the information that single packet data network PDN connects, or the characteristic of obtaining subscriber equipment is the information of single application, perhaps obtains the information that subscriber equipment is a machine M2M equipment;

Processing unit 802; Be used for only allowing to set up the information that single packet data network PDN connects according to the subscriber equipment that first acquiring unit 801 gets access to; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that subscriber equipment is carried out routing optimality.

Wherein, processing unit 802 specifically can be for setting up module;

Set up module; The subscriber equipment that is used for getting access to according to first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that the PDN that subscriber equipment is set up routing optimality connects.

This sets up module (this processing unit 802 in other words) can comprise that first address obtains subelement, the first request subelement and first receives subelement;

First address obtains subelement; The subscriber equipment that is used for getting access at first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application; Or after subscriber equipment is the information of M2M equipment, obtain the IP address of the sided access network element that UE inserts;

The first request subelement, perhaps creating the PDP Context request message obtains the accessed pairing sided access network element in IP address of subelement to said first address to be used to send the establishment conversation request message;

First receives subelement, is used to receive returning that this sided access network element (promptly received the first request establishment conversation request message that subelement sent or created the sided access network element of PDP Context request message) returns and creates conversational response message or create the PDP Context response message.

Perhaps, processing unit 802 specifically can be the routing optimality indicating module;

The routing optimality indicating module; The subscriber equipment that gets access to according to first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information indication sided access network element of M2M equipment is carried out routing optimality.

This routing optimality indicating module (processing unit 802 in other words) can comprise that second address obtains subelement, the second request subelement and second receives subelement;

The second request subelement is used to send initialization context foundation request, RAB request for allocation or carries and sets up request message to said sided access network element;

The second indication subelement is used for setting up request message in said initialization context foundation request, RAB request for allocation or carrying and comprises indication information, this indication information indication sided access network element execution routing optimality.

Wherein, first acquiring unit 801 specifically can obtain submodule for data;

Data are obtained submodule; Be used for obtaining subscription data or group's subscription data of subscriber equipment from subscribed database; If the PDN connection number that allows in the said subscription data to use is, know that then subscriber equipment only allows to set up single packet data network PDN and connects at 1 o'clock; Perhaps, be used for obtaining from subscribed database subscription data or group's subscription data of subscriber equipment, if when characteristic information is single application in the said subscription data, the characteristic of then knowing subscriber equipment is single application; Perhaps, be used for obtaining from subscribed database subscription data or group's subscription data of subscriber equipment, said subscription data comprises that subscriber equipment is the information of M2M, is that the information of M2M knows that subscriber equipment is a M2M equipment according to subscriber equipment.

Perhaps, said first acquiring unit 801 specifically can obtain submodule for sign;

Sign is obtained submodule, is used to obtain the M2M group identification of subscriber equipment, and obtaining the PDN connection number that allows to use according to the M2M group identification is 1 o'clock, knows that then subscriber equipment only allows to set up single packet data network PDN and connects; Perhaps, be used to obtain the M2M group identification of subscriber equipment, when obtaining characteristic information and be single application according to the M2M group identification, the characteristic of then knowing subscriber equipment is single application; Perhaps, be used to obtain the M2M group identification of subscriber equipment,, know that then subscriber equipment is a M2M equipment if comprise when this M2M group identification is deposited in the M2M facility information table; Perhaps, being used to receive the indication subscriber equipment that subscriber equipment sends is the indication information of M2M equipment.

This core management network element can also comprise second acquisition unit;

Second acquisition unit is used for obtaining any or the combination that sided access network element is supported information with the information that allows subscriber equipment use routing optimality of routing optimality;

Said processing unit 802; The sided access network element that also is used for obtaining according to second acquisition unit is supported any or the combination of information with the information that allows subscriber equipment use routing optimality of routing optimality; And first any information in the subscriber equipment that obtains of acquiring unit 801 characteristic that only allows to set up information that single packet data network PDN connects and subscriber equipment is the information of single application with subscriber equipment is M2M equipment the information for carrying out routing optimality for subscriber equipment, perhaps indicate sided access network element execution route optimisation process such as the PDN connection of setting up routing optimality for subscriber equipment.I.e. any one in (1), (2) and (3) as follows:

In order to guarantee that only setting up a PDN connects, this core management network element can also comprise the refusal unit;

The refusal unit; Be used for obtaining subscriber equipment and only allow to set up the information that single packet data network PDN connects at first acquiring unit 801; Or the characteristic of obtaining subscriber equipment is the information of single application; Perhaps obtain the information that subscriber equipment is a M2M equipment, and processing unit 802 confirms as UE and set up after PDN connects, the PDN that refuses other connects the request of foundation.

This core management network element can also comprise receiving element and indicating member;

Receiving element receives update inquiry information or service request information that subscriber equipment sends;

Indicating member; If the PDN that the PDN that sets up routing optimality for UE connects and sided access network element changes or old PDN is connected to normal route connects; And only allow to set up the information that single PDN connects according to the subscriber equipment that obtains; Or the characteristic of obtaining subscriber equipment is the information of single application, and when the information of perhaps obtaining subscriber equipment and be M2M equipment was confirmed as PDN that UE sets up routing optimality and connected, the indication subscriber equipment was initiated attachment flow;

More than the enforcement of each unit specifically can repeat no more at this referring to method embodiment.

Core management network element specifically can comprise the network elements such as mobile management network element in MME, SGSN or the non-3GPP network.

Correspondingly, the embodiment of the invention also provides a kind of communication system, comprises any core management network element that the embodiment of the invention provides, and specifically can repeat no more at this referring to front embodiment.

By on can know; Core management network element in the present embodiment can only allow to set up a PDN connection or know that the characteristic of UE is single application or knows that UE is a M2M equipment through knowing UE; Decide the PDN that sets up routing optimality for UE to connect, make when the data for UE realize that route optimisation process is with the system loading that reduces gateway, guarantee only to have set up a PDN connection for UE; Avoided setting up the generation of the situation of redundant PDN connection for UE; Thereby saved the resource of network side, simultaneously, do not needed the PDN of configuration routing optimality among the UE to connect the APN that uses; The PDN that does not also need UE can distinguish normal route connects the APN of use and the PDN of routing optimality is connected the APN that uses, and simplifies the processing of UE; Perhaps, core management network element also can only allow to set up a PDN connection or know that the characteristic of UE is single application or knows that UE is a M2M equipment, decides the indication sided access network element to carry out route optimisation process through knowing UE; Like this, sided access network element just can directly be carried out route optimisation process after receiving the upstream data bag, has both realized the processing of routing optimality of the data of UE; Reduced the system loading of gateway, again because for UE has only set up a PDN connection, so avoided connecting for UE sets up redundant PDN; Saved the resource of network side, and, because sided access network element need not carried out the parsing of upstream data bag; So can simplify the processing in the sided access network element; Improve the performance of sided access network element, reduce the possibility of sided access network element overload, thereby increase user's experience.

One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of the foregoing description is to instruct relevant hardware to accomplish through program; This program can be stored in the computer-readable recording medium; Storage medium can comprise: read-only memory (ROM; Read Only Memory), random access memory (RAM, RandomAccess Memory), disk or CD etc.

More than processing method, device and the communication system of a kind of routing optimality that the embodiment of the invention provided have been carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.

Claims

1. the processing method of a routing optimality is characterized in that, comprising:

Only allow to set up the information that single packet data network PDN connects according to the subscriber equipment that gets access to, or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that subscriber equipment is carried out routing optimality;

Wherein, saidly carry out routing optimality for subscriber equipment and comprise: the PDN that sets up routing optimality for subscriber equipment connects; Perhaps, the indication sided access network element is carried out routing optimality.

2. method according to claim 1 is characterized in that, the PDN connection of setting up routing optimality for subscriber equipment is specially:

Obtain the IP address of the sided access network element of UE access;

Send and create conversation request message or create the PDP Context request message sided access network element corresponding to said IP address;

Receive the establishment conversational response message that said sided access network element returns or create the PDP Context response message.

3. method according to claim 1 and 2; It is characterized in that; Obtains subscriber equipment and only allow to set up the information that single PDN connects, or the characteristic of obtaining subscriber equipment is the information of single application, also comprise before perhaps obtaining subscriber equipment and be the information of M2M equipment:

Receive update inquiry information or service request information that subscriber equipment sends;

Obtains subscriber equipment and only allow to set up the information that single PDN connects, or the characteristic of obtaining subscriber equipment is the information of single application, also comprise after perhaps obtaining subscriber equipment and be the information of M2M equipment:

Know that sided access network element changes or PDN that old PDN is connected to normal route connects; And only allow to set up the information that single PDN connects according to the subscriber equipment that obtains; Or the characteristic of obtaining subscriber equipment is the information of single application; The information of perhaps obtaining subscriber equipment and be M2M equipment is PDN that UE sets up routing optimality when connecting, and the indication subscriber equipment is initiated attachment flow.

4. method according to claim 1 is characterized in that, the indication sided access network element is carried out routing optimality and is specially:

Initialization context foundation request Initial Context Setup Request, RAB request for allocation RAB Assignment Request or carrying foundation issuing sided access network element ask to comprise indication information in the Bearer Setup Request message that said indication information indication sided access network element is carried out routing optimality.

5. method according to claim 1 is characterized in that, the said subscriber equipment that obtains only allows to set up the information that single packet data network PDN connects and comprises:

From subscribed database, obtain the subscription data of subscriber equipment,, know that then subscriber equipment only allows to set up single packet data network PDN and connects at 1 o'clock if the PDN connection number that allows in the subscription data to use is; Perhaps,

Obtain the M2M group identification of subscriber equipment, obtaining the PDN connection number that allows to use according to the M2M group identification is 1 o'clock, knows that then subscriber equipment only allows to set up single packet data network PDN and connects.

6. method according to claim 5 is characterized in that, saidly obtains the PDN that allow to use according to the M2M group identification to connect number be 1 to comprise:

Configuration PDN connects a numerical table in the core management network element; Core management network element is inquired about said PDN according to said M2M group identification and is connected a numerical table; If the PDN connection number of the said M2M group identification in the said PDN connection numerical table is 1 then knows that the PDN connection number that allows to use is 1; Perhaps,

From subscribed database, obtain M2M group subscription data according to said M2M group identification core management network element; To connect number be that to connect number be 1 for PDN that 1 information then know allows to use if said M2M group subscription data comprises the PDN that allows to use.

7. method according to claim 1 is characterized in that, the information that the said characteristic of obtaining subscriber equipment is single application comprises:

From subscribed database, obtain the subscription data of subscriber equipment, if when characteristic information is single application in the said subscription data, the characteristic of then knowing subscriber equipment is single application; Perhaps,

Obtain the M2M group identification of subscriber equipment, when obtaining characteristic information and be single application, know that then the characteristic of obtaining subscriber equipment is single application according to the M2M group identification.

8. method according to claim 7 is characterized in that, said to obtain characteristic information according to the M2M group identification be that single application comprises:

The characteristic of the M2M group that inquiry is preset according to the M2M group identification; If the characteristic of said M2M group is single application then knows that characteristic information is single application; Perhaps,

From subscribed database, obtain M2M group subscription data according to the M2M group identification, be the information of single application then know that characteristic information is single application if said M2M group subscription data comprises characteristic.

9. method according to claim 1 is characterized in that, the said subscriber equipment that obtains is that the information of M2M equipment comprises:

From subscribed database, obtain the subscription data of subscriber equipment, said subscription data comprises that subscriber equipment is the information of M2M, is that the information of M2M knows that obtaining subscriber equipment is M2M equipment according to subscriber equipment; Perhaps,

The indication subscriber equipment that receives the subscriber equipment transmission is the indication information of M2M equipment; Perhaps,

Obtain the M2M group identification of subscriber equipment; From subscribed database, obtain M2M group subscription data according to said M2M group identification; If said M2M group subscription data comprises that subscriber equipment is the information of M2M, be that the information of M2M knows that obtaining subscriber equipment is M2M equipment according to subscriber equipment.

10. method according to claim 1 is characterized in that, also comprises:

Obtain information that sided access network element supports routing optimality and allow subscriber equipment to use any one or combination in the information of routing optimality;

The information of supporting routing optimality according to sided access network element with allow subscriber equipment to use any one or combination in the information of routing optimality, and the subscriber equipment characteristic that only allows to set up information that single packet data network PDN connects and subscriber equipment is that information and the subscriber equipment of single application is that any information in the information of M2M equipment is that PDN that subscriber equipment is set up routing optimality is connected and perhaps indicates sided access network element execution route optimisation process.

11. method according to claim 1 is characterized in that, also comprises:

The PDN that refuses other connects the request of foundation.

12. a core management network element is characterized in that, comprising:

Processing unit; The subscriber equipment that is used for getting access to according to first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that subscriber equipment is carried out routing optimality;

13. core management network element according to claim 12 is characterized in that,

Said processing unit; The subscriber equipment that specifically is used for getting access to according to first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information of M2M equipment is that the PDN that subscriber equipment is set up routing optimality connects.

14. core management network element according to claim 13 is characterized in that, said processing unit comprises:

First receives subelement, is used to receive the establishment conversational response message that said sided access network element returns or creates the PDP Context response message.

15. core management network element according to claim 12 is characterized in that,

Said processing unit; The subscriber equipment that specifically is used for getting access to according to first acquiring unit only allows to set up the information that single packet data network PDN connects; Or the characteristic of subscriber equipment is the information of single application, or subscriber equipment is that the information indication sided access network element of M2M equipment is carried out routing optimality.

16. core management network element according to claim 15 is characterized in that, said processing unit comprises:

The second indication subelement is used for setting up request message in said initialization context foundation request, RAB request for allocation or carrying and comprises indication information, said indication information indication sided access network element execution routing optimality.

17. core management network element according to claim 12 is characterized in that,

Said first acquiring unit; Specifically be used for obtaining subscription data or group's subscription data of subscriber equipment from subscribed database; If the PDN connection number that allows in the said subscription data to use is, know that then subscriber equipment only allows to set up single packet data network PDN and connects at 1 o'clock; Perhaps, be used for obtaining from subscribed database subscription data or group's subscription data of subscriber equipment, if when characteristic information is single application in the subscription data, the characteristic of then knowing subscriber equipment is single application; Perhaps, be used for obtaining from subscribed database subscription data or group's subscription data of subscriber equipment, said subscription data comprises that subscriber equipment is the information of M2M, is that the information of M2M knows that subscriber equipment is a M2M equipment according to subscriber equipment.

18. core management network element according to claim 12 is characterized in that,

Said first acquiring unit specifically is used to obtain the M2M group identification of subscriber equipment, and obtaining the PDN that allows to use according to the M2M group identification, to connect number be 1 o'clock, knows that then subscriber equipment only allows to set up single packet data network PDN and connects; Perhaps, be used to obtain the M2M group identification of subscriber equipment, when obtaining characteristic information and be single application according to M2M group, the characteristic of then knowing subscriber equipment is single application; Perhaps, be used to obtain the M2M group identification of subscriber equipment,, know that then subscriber equipment is a M2M equipment if when comprising this M2M group identification in the M2M facility information table; Perhaps, being used to receive the indication subscriber equipment that subscriber equipment sends is the indication information of M2M equipment.

19. core management network element according to claim 12 is characterized in that, also comprises second acquisition unit;

Second acquisition unit is used for obtaining sided access network element and supports the information of routing optimality and at least one of the information that allows subscriber equipment use routing optimality;

Said processing unit; The sided access network element that also is used for obtaining according to second acquisition unit is supported the information of routing optimality and at least one of the information that allows subscriber equipment use routing optimality; And first the subscriber equipment that obtains of the acquiring unit characteristic that only allows to set up information that single packet data network PDN connects and subscriber equipment be any information in the information of single application and the information that subscriber equipment is M2M equipment, be subscriber equipment execution routing optimality.

20. core management network element according to claim 12 is characterized in that, also comprises the refusal unit;

The refusal unit, being used at processing unit is after subscriber equipment is carried out routing optimality, the PDN that refuses other connects the request of foundation.

21. core management network element according to claim 12 is characterized in that, also comprises receiving element and indicating member;

Receiving element is used to receive update inquiry information or the service request information that subscriber equipment sends;

Indicating member; If be used for setting up the PDN connection of routing optimality for UE; And the PDN that sided access network element changes or old PDN is connected to normal route connects, and only allows to set up the information that single PDN connects according to the subscriber equipment that first acquiring unit obtains, or the characteristic of obtaining subscriber equipment is the information of single application; The information of perhaps obtaining subscriber equipment and be M2M equipment is PDN that UE sets up routing optimality when connecting, and the indication subscriber equipment is initiated attachment flow.

22. a communication system is characterized in that, comprises each described core management network element in the claim 12 to 21.