CN102625420A

CN102625420A - Network access method and system

Info

Publication number: CN102625420A
Application number: CN2011100340635A
Authority: CN
Inventors: 曲爱妍; 李志军
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-01-31
Filing date: 2011-01-31
Publication date: 2012-08-01
Anticipated expiration: 2031-01-31
Also published as: CN102625420B

Abstract

The invention discloses a network access method and a network access system. The method comprises the following steps that: user equipment (UE) sends an attach request to a mobility management entity (MME); the MME selects a machine to machine (M2M) gateway supporting a machine type communication (MTC) function for the UE through MTC indication information; the UE is accessed to the selected M2M gateway. According to the invention, problems of occupation of resources of a core network and low transmission efficiency and accuracy are solved.

Description

Method for network access and system

Technical field

The present invention relates to the communications field, in particular to a kind of method for network access and system.

Background technology

At present, the communication service of machine to machine (Machine to Machine abbreviates M2M as) is used widely gradually, for example, and in application such as logistics system, remote meter reading, Smart Homes.M2M service provider mainly uses existing wireless network to carry out the M2M business; For example; PS networks such as GPRS (General Packet Radio service abbreviates GPRS as) network, evolved packet system (Evolved Packet System abbreviates EPS as) network.Because M2M business and interpersonal communication (Human to Human; Abbreviating H2H as) business has evident difference property; Therefore, need carry out necessary optimization, obtain best network management and network communication quality when M2M uses to satisfy to network design.

System Architecture Evolution (System Architecture Evolution; Abbreviation SAE) proposition is Packet Based Network (the Evolved Packet System in order to make evolution; Be called for short EPS) can provide higher transmission rate, shorter transmission delay, optimization to divide into groups; And UTRAN (the Evolved UTRAN of support evolution; Abbreviate E-UTRAN as), the mobile management between the access network of UTRAN, WLAN (Wireless Local Area Network abbreviates WLAN as) and other non-3GPP.

Fig. 1 is the Organization Chart of EPS; As shown in Figure 1; EPS comprises: the UMTS land radio access web of evolution (Evolved Universal Terrestrial Radio Access Network; Abbreviate E-UTRAN as) 102, (the Packet Data Network of Packet Data Network; Abbreviate PDN as) 104, mobile management entity (Mobility Management Entity abbreviates MME as) 106, gateway (Serving Gateway abbreviates SGW or S-GW as) 108, packet data network gateway (PDN Gateway; Abbreviate PGW or P-GW as) 110, the strategy and charging regulation function entity (Policy and Charging Rules Function; Abbreviate PCRF as) 112, home subscriber server (Home Subscriber Server abbreviates HSS as) 114, MTC (Machine Type Communication, Machine Type communication) server 116 and MTC UE118.This EPS provides lower delay, and allows more wireless access system to insert.

Wherein, the network element that comprises in the UMTS land radio access web 102 of evolution is enode b (Evolved NodeB abbreviates eNodeB as), and the access that is used to the user provides Radio Resource; Packet Data Network 104 provides professional network for the user.

Mobile management entity 106 is chain of command functional entitys; The server of interim storaging user data; Be in charge of and store the context (for example, ID, mobility management states, user security parameters etc.) of UE, for the user distributes temporary mark; When UE quarters at this tracing area or this network, be responsible for this user is carried out authentication.

Gateway 108 is user entities, is responsible for the user face data route and handles, and termination is in the downlink data of the UE of free time (ECM_IDLE) state.The SAE of management and storage UE carries (bearer) context, for example IP bearer service parameter and network internal routing iinformation etc.SGW is the anchor point of 3GPP internal system user plane, and a user can only have a SGW a moment.

Packet data network gateway 110 is to be responsible for the gateway that UE inserts PDN, and distributing user IP address also is the mobility anchor point of 3GPP and non-3GPP connecting system, and the function of PGW comprises that also strategy is implemented, charging is supported.The user can insert a plurality of PGW at synchronization.Strategy also is arranged in PGW with the enforcement functional entity (Policy and Charging Enforcement Function abbreviates PCEF as) that charges.

Strategy is responsible for to PCEF policy control and charging regulation being provided with charging regulation function entity 112.

Home subscriber server 114 is responsible for the permanent storage user contracting data, and the content of HSS storage comprises the international mobile subscriber identity (International Mobile Subscriber Identification abbreviates IMSI as) of UE, the IP address of PGW.

Physically, above-mentioned SGW108 and PGW110 possibly unify, and EPC system user veil unit comprises SGW and PGW.

116 main information gathering and the storage/work of being responsible for MTC subscriber equipment (MTC UE) such as processing of MTC server, and can carry out necessary management to MTC UE.

MTC UE 118 is responsible for collecting the information of some collectors usually, and inserts core net through the RAN node, with the MTCServer interaction data.

In Fig. 1, MTC UE 118 needs through the EPS network to MTC Server or other MTC UE transmitting data information.The SAE network is set up the GTP tunnel between the SGW-PGW for this transmission, and data message is realized reliable transmission through GTP tunnel.

Fig. 2 is that the UE based on Fig. 1 is linked into the EPS network under the prior art, carries out the flow chart in the EPS network attachment.As shown in Figure 2, comprise like lower component: MTC UE 118, eNodeB 120, MME 106, S-GW 108, PDN GW 110, PCRF 112 and HSS 114 mainly may further comprise the steps with the relevant attachment flow of upper-part:

S201, UE initiates the network attachment request in order to be linked into the SAE network to eNodeB, has carried IMSI, the network accessibility of UE, the information such as indication of request distributing IP therein;

S202, eNodeB are that UE selects a MME of service for it, and attach request is forwarded to this MME, and the important informations such as sign with UE also carry to this MME simultaneously;

S203; MME sends authorization data request message (containing IMSI) (S203a) to HSS; HSS at first judges the subscription data that IMSI is corresponding, is put on the blacklist if search less than any signatory perhaps IMSI, and then HSS returns the authorization data response and carries suitable error reason (S203b) to MME; If find the corresponding subscription data of IMSI, then HSS returns authorization data response message (containing authentication vector) (S203b) to MME;

MME carries out the legitimacy of authorizing procedure with verification terminal IMSI, and carries out the safe mode flow process to launch safe connection.

S204, MME sends position updating request to the HSS of home network, carries the sign of MME, the sign of UE in the message, to inform the current zone of being inserted of UE;

S205, HSS finds out contracted user's data of UE according to the sign of UE, sends to MME.Mainly comprise information such as default APN (Access Point Name is called for short APN), amount of bandwidth in the user data;

MME receives user data, and whether inspection UE is allowed access to network, returns to HSS and receives user's response; If MME finds UE problems such as roaming restriction or access restriction are arranged, MME will forbid that UE adheres to, and notice HSS.

S206, HSS send to MME and confirm position renewal response;

S207, MME are that UE selects a S-GW, and set up the request of default bearing to its transmission.In this request, MME informs the information that S-GW is necessary: the sign of UE, the sign of MME, be the indication of UE distributing IP address, default bandwidth information, PDN GW address etc.;

S208, S-GW send the request of setting up default bearing to PDN GW.In this request, S-GW informs the information that PDN GW is necessary: the address of S-GW, default bandwidth information, for the indication of UE distributing IP address etc.;

S209, if necessary, PDN GW is this UE institute's configured strategy and charging regulation, decision information to PCRF request;

S210, PDN GW sets up default bearer according to strategy and charging decision information that PCRF returns, and returns carrying to S-GW and set up response;

S211, S-GW sends the response that default bearing is set up to MME;

S212, MME send to eNodeB and adhere to acceptance response, show that the request that is attached to network of UE is accepted, carry Serving GW address and TEID (Tunnel Endpoint Identifier, tunnel port-mark);

S213, eNodeB sends voice bearer to UE and sets up request, and require UE to preserve and carry the important information of setting up, and open corresponding ports.In message, carried: bearer network ID, PDN GW address, the IP address of distributing to UE, bandwidth information etc.;

S214, UE sends radio bearer to eNodeB and sets up response;

S215, eNodeB notice MME attaching process is accomplished;

S216, MME sends more new bearer request to S-GW, notifies sign, address into the eNodeB of UE service;

S217, S-GW sends more new bearer response to MME;

S218, if PDN GW is not the HSS appointment, then MME sends position updating request to HSS, and notice is the address information of the PDN GW that UE served to HSS, and HSS upgrades this information.

According to the existing PS network architecture described in Fig. 1 and Fig. 2, prior terminal such as mobile phone can receive the wireless signal that Radio Access Network sends, and are attached in the carrier network through Radio Access Network, can carry out business such as voice call then.

In above-mentioned flow process, in the S207 step, MME selects SGW and PGW.The based on network topological structure of MME is that UE selects an available S-GW.In S-GW service overlapping region, the selection of S-GW will reduce the possibility that S-GW changes, and also need consider the load balancing between the S-GW simultaneously., S-GW also possibly utilize DNS (Domain Name System, domain name system) biological function explore to go out the address list that to serve the S-GW of this UE position when being selected.When selecting S-GW between MME and the DNS, can also consider the ability of S-GW (for example, S-GW is a S5/S8 interface of supporting also to be based on based on PMIP GTP, still all supports for two) as an additional information.

The selection of P-GW also is in MME, to realize.The user signing contract information that this functional utilization HSS provides and other possible additional standard distribute a P-GW to connect so that PDN to be provided for 3GPP inserts.For each signatory PDN, HSS provides following information: the sign of a P-GW and an APN; Perhaps APN and to the indication of this APN, whether this indication explanation allows to distribute P-GW by VPLMN, still can only distribute P-GW by HPLMN; In addition, also to indicate the pairing signatory PDN of which APN be the default APN of this UE to HSS.For initially adhering to, UE provides an APN for type of attachment, then uses this APN to obtain the P-GW sign.This APN possibly be in the signatory context, also possibly not be in the signatory context.If in the signatory context, can use the P-GW sign that this APN is corresponding in the signatory context, also can use new P-GW of DNS function selecting.

The M2M business is the global machine class communication service of just having risen and put on gradually the industrialization schedule; It carries out the collection of information data through M2M terminal in the sensing net; Through the mode of Network Transmission information data, make every profession and trade and individual all can enjoy the facility of information service whenever and wherever possible then.M2M can be widely used in sector application, domestic. applications, individual's application etc.Sector application is like traffic monitoring, intelligent grid, building alarm, rescue at sea, automatic vending machine, driving paying etc.Domestic. applications is like automatic data logging, temperature control etc.The individual use as: life detection, far-end diagnosis etc.

The communication object of M2M is a machine, the Human-to-Machine.Data communication between one or more machines is defined as MTC (Machine Type Communication, Machine Type communication), lessly in this case needs human-computer interaction.Participate in the machine of MTC, be defined as MTC equipment.MTC equipment is MTC user's terminal, can communicate through PLMN network and MTC equipment, MTC server.ME (Mobile Equipment) is the subsidiary functional block of MTC equipment, and this functional block is used for MTC equipment is linked into wireless network, like EPS network, GPRS network etc.MTC server (MTC Server) is managed and is monitored MTC equipment.

Because MTC equipment mostly be the concrete equipment of using under the different scenes, kind and quantity are all a lot, and like automatic data logging and life detection use is different equipment etc.Simultaneously MTC equipment has Hypomobility, PS only attribute in response to also having different characteristic with difference like lifter apparatus such as elevators, and keep watch on, alert device except that having Hypomobility, PS only, also have attributes such as low transfer of data and high availability.Therefore M2M equipment and H2H equipment have in application facet a lot of different, specifically, 1) the M2M terminal is magnanimity, quantity is many more than the H2H terminal, so terminal iidentification possibly just can not be used the IMSI that has the H2H terminal definitions now and identifies; 2) the M2M terminal is primarily aimed at the application of Hypomobility, and the M2M terminal more than 90% is what not moved, is very different at aspect such as mobile management and prior art like this, does not need frequently to carry out position updating process like network; 3) the M2M terminal is primarily aimed at the application of low data bulk, and the business of the high bandwidth channel that provides in this and the existing network has very big difference, so network is very different in the transmission mode and the prior art of low data bulk.4) others need be handled MTC equipment group like network, need satisfy the demand of each characteristic of MTC terminal, and like time control, MTC monitoring etc., this all will be optimized just and can satisfy existing network.Therefore, for different operators, if the existing network load can not satisfy the professional demand of following M2M, operator need select how to optimize with on-premise network is satisfied growing M2M application demand.

By on can know; Need manage MTC equipment or terminal in the prior art; But through existing network insertion flow process, system and MTC equipment just come transmit information data through general gateway, thereby have taken the resource of core network; Caused efficiency of transmission lower, the problem that accuracy is not high.

Summary of the invention

Main purpose of the present invention is to provide a kind of method for network access and system, takies the resource of core network with solution, and efficiency of transmission is lower, the problem that accuracy is not high.

According to an aspect of the present invention, a kind of method for network access is provided, comprising: UE sends attach request to MME; MME is the M2M gateway that UE selects to support the MTC function through the MTC indication information; UE is linked into selected M2M gateway through Radio Access Network.

Further, MME is that UE selects the step of the M2M gateway of support MTC function to comprise through the MTC indication information: MME sends a request message to domain name system DNS according to the MTC indication information; DNS selects to support the M2M gateway of MTC function after receiving request message; DNS sends list of gateways information to MME, and wherein, the M2M gateway of MTC function supported in list of gateways information record; MME selects a M2M gateway of supporting the MTC function for UE from list of gateways information.

Further, MME comprises to the step that DNS sends a request message according to the MTC indication information: MME sends the request message that carries the MTC indication information to DNS.

Further, MME comprises to the step that DNS sends a request message according to the MTC indication information: MME is according to MTC indication information structure FQDN (Fully Qualified Domain Name, full name domain name) information; The request message that MME will carry FQDN information sends to DNS.

Further, MME comprises according to the step of MTC indication information structure FQDN information: MME receives the default APN APN information from home network; MME becomes to meet the FQDN information of the rule of the residing network of DNS with the APN information mapping according to the MTC indication information.

Further, MME comprises for UE selects the step of a M2M gateway from list of gateways information: MME selects a M2M gateway of supporting MTC function for UE according to link weight from list of gateways information.

Further, the M2M gateway comprises: gateway SGW and/or packet data network gateway PGW.

According to a further aspect in the invention; A kind of network access system is provided, has comprised: user equipment (UE) and mobile management entity MME, wherein; MME is used to receive the attach request of UE, and is the machine to machine M2M gateway of UE selection support MTC function through Machine Type communication MTC indication information; UE is used for being linked into selected M2M gateway through Radio Access Network.

Further; Network access system also comprises: domain name system DNS, and wherein, DNS is used to receive the request message that MME sends according to the MTC indication information; After receiving request message, select to support the M2M gateway of MTC function; And to MME transmission list of gateways information, wherein, the M2M gateway of MTC function supported in list of gateways information record; MME also is used for after receiving list of gateways information, from list of gateways information, selects a M2M gateway of supporting the MTC function for UE.

Further, MME comprises: first transmitting element is used for sending the request message that carries the MTC indication information to DNS.

Further, MME comprises: structural unit is used for the information according to MTC indication information structure full name domain name FQDN; Second transmitting element is used for the request message that carries FQDN information is sent to DNS.

Further, structural unit comprises: receiver module is used to receive the default APN APN information from home network; Mapping block is used for according to the MTC indication information APN information mapping being become to meet the FQDN information of the rule of the residing network of DNS.

Further, MME comprises: selected cell is used for selecting a M2M gateway of supporting MTC function from list of gateways information for UE according to link weight.

In the present invention; MME chooses the gateway of special support MTC function through the MTC indication information; Solved the resource that takies core network of coming transmit information data to cause owing to the use universal gateway in the prior art, efficiency of transmission is lower, the problem that accuracy is not high; And then reached and optimized flow through a network, satisfy the effect of M2M application demand.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is an EPS network system architecture sketch map in the prior art;

Fig. 2 is the flow chart that MTC UE carries out attaching process in the prior art at the EPS network;

Fig. 3 is a kind of preferred flow charts according to the method for network access of the embodiment of the invention;

Fig. 4 is a kind of preferred structure block diagram according to the network access system of the embodiment of the invention;

Fig. 5 selects to support the SGW of MTC function, the flow chart of PGW according to the MME of the method for network access of the embodiment of the invention;

Fig. 6 is the flow chart of indicating selection SGW according to the DNS of the method for network access of the embodiment of the invention according to MTC;

Fig. 7 is the flow chart of indicating selection SGW according to the MME of the method for network access of the embodiment of the invention according to MTC;

Fig. 8 is the flow chart of indicating selection PGW according to the DNS of the method for network access of the embodiment of the invention according to MTC;

Fig. 9 is the flow chart of indicating selection PGW according to the MME of the method for network access of the embodiment of the invention according to MTC.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment technical scheme according to the invention is done further to describe in detail so that those skilled in the art can better understand the present invention and can implement, but the embodiment that lifts not conduct to qualification of the present invention.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.

Embodiment 1

Fig. 3 is a kind of preferred flow charts according to the method for network access of the embodiment of the invention, comprises the steps:

S302, UE sends attach request to MME; Preferably, UE sends attach request through eNodeB to MME.

S304, MME is the M2M gateway that UE selects to support the MTC function through the MTC indication information;

S306, UE is linked into selected M2M gateway through Radio Access Network.

In this preferred embodiment; MME chooses the gateway of special support MTC function through the MTC indication information; Solved the resource that takies core network of coming transmit information data to cause owing to the use universal gateway in the prior art, efficiency of transmission is lower, the problem that accuracy is not high; And then reached and optimized flow through a network, satisfy the effect of M2M application demand.

Preferably, MME is that UE selects the step of the M2M gateway of support MTC function to comprise through the MTC indication information: MME sends a request message to DNS according to the MTC indication information; DNS selects to support the M2M gateway of MTC function after receiving request message; DNS sends list of gateways information to MME, and wherein, the M2M gateway of MTC function supported in list of gateways information record; MME selects a M2M gateway of supporting the MTC function for UE from list of gateways information.In this preferred embodiment, obtain the M2M gateway of supporting the MTC function through DNS, guaranteed the correctness of selecting.

Preferably, MME comprises to the step that DNS sends a request message according to the MTC indication information: MME sends the request message that carries the MTC indication information to DNS.In this preferred embodiment, adopt the mode of directly sending the MTC indication information to DNS, simplified operating process.

Preferably, MME comprises to the step that DNS sends a request message according to the MTC indication information: MME is according to MTC indication information structure FQDN information; The request message that MME will carry FQDN information sends to DNS.In this preferred embodiment, trigger the gateway that the MTC function is supported in the DNS inquiry through FQDN information, increased configuration flexibility of the present invention.

Preferably, MME comprises according to the step of MTC indication information structure FQDN information: MME receives the APN information from home network; MME becomes to meet the FQDN information of the rule of the residing network of DNS with the APN information mapping according to the MTC indication information.Preferably, MME is mapped as the APN of ownership place MTC type the FQDN of roaming place MTC type.In this preferred embodiment, guarantee the correct structure FQDN information of MME through mapping mode.

Preferably, MME comprises for UE selects the step of a M2M gateway from list of gateways information: MME selects a M2M gateway of supporting MTC function for UE according to link weight from list of gateways information.In this preferred embodiment, guarantee that further MME selects correct suitable M2M gateway.

Preferably, the M2M gateway comprises: SGW and/or PGW.Certainly, the present invention is not limited to SGW and PGW, also comprises the gateway that other can realize said function.

Embodiment 2

Fig. 4 is a kind of preferred structure block diagram according to the network access system of the embodiment of the invention; Comprise: UE 402 and MME404; Wherein, MME 404 is used to receive the attach request of UE 402, and is the M2M gateway of UE 402 selection support MTC functions through the MTC indication information; UE 402 is used for being linked into selected M2M gateway through Radio Access Network.

Preferably; Network access system also comprises: DNS, and wherein, DNS is used to receive the request message that MME404 sends according to the MTC indication information; After receiving request message, select to support the M2M gateway of MTC function; And to MME404 transmission list of gateways information, wherein, the M2M gateway of MTC function supported in list of gateways information record; MME404 also is used for after receiving list of gateways information, from list of gateways information, selects a M2M gateway of supporting the MTC function for UE.In this preferred embodiment, obtain the M2M gateway of supporting the MTC function through DNS, guaranteed the correctness of selecting.

Preferably, MME404 comprises: first transmitting element is used for sending the request message that carries the MTC indication information to DNS.In this preferred embodiment, adopt the mode of directly sending the MTC indication information to DNS, simplified operating process.

Preferably, MME404 comprises: structural unit is used for the information according to MTC indication information structure FQDN; Second transmitting element is used for the request message that carries FQDN information is sent to DNS.In this preferred embodiment, trigger the gateway that the MTC function is supported in the DNS inquiry through FQDN information, increased configuration flexibility of the present invention.

Preferably, structural unit comprises: receiver module is used to receive the APN information from home network; Mapping block is used for according to the MTC indication information APN information mapping being become to meet the FQDN information of the rule of the residing network of DNS.Preferably, MME is mapped as the APN of ownership place MTC type the FQDN of roaming place MTC type.In this preferred embodiment, guarantee the correct structure FQDN information of MME through mapping mode.

Preferably, MME 404 comprises: selected cell is used for selecting a M2M gateway of supporting MTC function from list of gateways information for UE according to link weight.In this preferred embodiment, guarantee that further MME selects correct suitable M2M gateway.

Preferably, above-mentioned M2M gateway comprises: SGW and/or PGW.Certainly, the present invention is not limited to SGW and PGW, also comprises the gateway that other can realize said function.

Embodiment 3

Fig. 5 selects to support the SGW of MTC function, the flow chart of PGW according to the MME of the method for network access of the embodiment of the invention, and in this flow process, MME judges the type of equipment, selects SGW, PGW according to device type.Simultaneously; If under roaming scence; And the APN form of roaming place and ownership place MTC type is inconsistent, and MME need be mapped as the APN of roaming place MTC type with the APN of ownership place MTC type, and structure FQDN (Fully Qualified Domain Name; The full name domain name), be used for inquiry, discovery SGW/PGW.Adopt the network access system of above-mentioned flow process, comprise following network element: MTC UE 502, E-UTRAN 504 (wherein comprising eNode B), MME 506 and HSS 508, above network element is carried out following steps:

S501, UE initiates the network attachment request in order to be linked into the EPS network to eNodeB (being arranged in E-UTRAN 504), has carried IMSI, the network accessibility of UE, the information such as indication of request distributing IP therein.The also portable equipment type indication of this message, wherein, the device type indication can indicating equipment be machine kind equipment (MTC equipment) or cell phone type equipment (H2H equipment), this parameter is optional;

S502, eNodeB will adhere to message forwarding to MME;

After S503, MME receive the attach request of MTC UE, send location update request message to HSS;

S504, HSS send the position to MME and upgrade response message, and issue subscription data, in subscription data, are included as the device type indication of UE, and wherein, this parameter is optional;

S505, MME can judge the device type of UE according to the indication of the device type of UE or other information like number section etc.MME can select SGW, PGW by following method: according to device type inquiry DNS, selection can be supported SGW, the PGW of MTC function; Perhaps; MME is configured to the FQDN of MTC type with APN, is used for inquiry and finds SGW, PGW, and this scene is mainly used under the roaming scence; And the APN form of roaming place and ownership place MTC type is inconsistent, and MME need be mapped as the FQDN of roaming place MTC type with the APN of ownership place MTC type;

S506, the subsequent process of execution attachment flow.

Embodiment 4

Fig. 6 be according to the DNS of the method for network access of the embodiment of the invention according to MTC indication select the flow chart of SGW, MME carries the MTC indication when carrying out the DNS inquiry, DNS according to MTC indication select SGW.Adopt the network access system of this flow process to comprise following network element UE602, MME604 and DNS606, above network element is carried out following steps:

S601, UE sends attach request through eNodeB to MME;

S602, MME sends the DNS request message to DNS, carries position and the MTC indication of UE in the message;

S603, DNS is designated as the suitable SGW tabulation of UE selection according to position and the MTC of UE; Preferably, this SGW list records has the SGW of a plurality of support MTC functions;

S604, DNS sends the DNS response message to MME, wherein, carries above-mentioned SGW tabulation in this message;

S605, MME select a SGW from the SGW tabulation be that UE creates default bearing;

S606, the subsequent process of execution attachment flow.

Fig. 7 is the flow chart of indicating selection SGW according to the MME of the method for network access of the embodiment of the invention according to MTC; It is the another kind of implementation of Fig. 6 embodiment; MME is when carrying out the DNS inquiry; Do not carry the MTC indication, and DNS carries the indication whether each SGW supports MTC in the SGW tabulation that returns to MME.MME indicates the SGW that can select to support the MTC function according to MTC.Adopt network element as shown in Figure 6, each network element is carried out following steps:

Comprise the indication of whether supporting MTC in the SGW tabulation that S700, DNS preset;

S701, UE sends attach request through eNodeB to MME;

S702, MME sends the DNS request message to DNS, wherein, carries the position of UE in this message;

S703, DNS is that UE selects suitable SGW tabulation according to the position of UE;

S704, DNS sends the DNS response message to MME, carries the SGW tabulation in the message, wherein, comprises the indication whether SGW supports MTC in this tabulation;

Whether S705, MME support the indication of MTC from the SGW tabulation, to select a SGW according to UE be that UE initiates to create default bearing; Preferably, MME selects a SGW who supports the MTC function from the SGW tabulation;

S706, the subsequent process of execution attachment flow.

Embodiment 5

Fig. 8 be according to the DNS of the method for network access of the embodiment of the invention according to MTC indication select the flow chart of PGW, MME carries the MTC indication when carrying out the DNS inquiry, DNS according to MTC indication select PGW.Adopt the network access system of this flow process to comprise following network element: UE802, MME804 and DNS806, above network element is carried out following steps:

S801, UE sends attach request through eNodeB to MME;

S802, MME sends the DNS request message to DNS, wherein, carries APN and MTC indication in this message;

S803, DNS is designated as the suitable PGW tabulation of UE selection according to APN and MTC; Preferably, this PGW list records has the PGW of a plurality of support MTC functions;

S804, DNS sends the DNS response message to MME, wherein, carries above-mentioned PGW tabulation in this message;

S805, MME select a PGW from the PGW tabulation be that UE creates default bearing;

S806, the subsequent process of execution attachment flow.

Fig. 9 is the flow chart of indicating selection PGW according to the MME of the method for network access of the embodiment of the invention according to MTC; It is the another kind of implementation of Fig. 8 embodiment; MME is when carrying out the DNS inquiry; Do not carry the MTC indication, and DNS carries the indication whether each PGW supports MTC in the PGW tabulation that returns to MME.MME indicates the PGW that can select to support the MTC function according to MTC.Adopt network element as shown in Figure 8, each network element is carried out following steps:

Comprise the indication of whether supporting MTC in the PGW tabulation that S900, DNS preset;

S901, UE sends attach request through eNodeB to MME;

S902, MME sends the DNS request message to DNS, wherein, carries APN in this message;

S903, DNS is that UE selects suitable PGW tabulation according to the position of UE;

S904, DNS sends the DNS response message to MME, carries the PGW tabulation in the message, wherein, comprises the indication whether PGW supports MTC in this tabulation;

Whether S905, MME support the indication of MTC from the PGW tabulation, to select a PGW according to UE be that UE initiates to create default bearing; Preferably, MME selects a PGW who supports the MTC function from the PGW tabulation;

S906, the subsequent process of execution attachment flow.

From above description, can find out that the present invention has realized following technique effect: when the M2M terminal of magnanimity was linked into network, the M2M core network that Virtual network operator can deployment-specific satisfied the M2M business demand.When the M2M terminal is inserted; Mobile management net element can be discerned the M2M terminal and select corresponding SGW/PGW through device type or/and access capability or/and subscription data; Neither take the existing network core-network resources thereby reach, optimize flow through a network, can satisfy the effect of M2M application demand again.

Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a method for network access is characterized in that, comprising:

User equipment (UE) sends attach request to mobile management entity MME;

MME is the machine to machine M2M gateway that said UE selects to support the MTC function through Machine Type communication MTC indication information;

Said UE is linked into selected M2M gateway through Radio Access Network.

2. method according to claim 1 is characterized in that, MME is that said UE selects the step of the M2M gateway of support MTC function to comprise through the MTC indication information:

Said MME sends a request message to domain name system DNS according to said MTC indication information;

Said DNS selects to support the M2M gateway of MTC function after receiving described request message;

Said DNS sends list of gateways information to said MME, and wherein, the M2M gateway of MTC function supported in said list of gateways information record;

Said MME is that said UE selects a M2M gateway of supporting the MTC function from said list of gateways information.

3. method according to claim 2 is characterized in that, said MME comprises to the step that DNS sends a request message according to the MTC indication information:

Said MME sends the described request message that carries the MTC indication information to said DNS.

4. method according to claim 2 is characterized in that, said MME comprises to the step that DNS sends a request message according to the MTC indication information:

Said MME is according to MTC indication information structure full name domain name FQDN information;

The described request message that said MME will carry said FQDN information sends to said DNS.

5. method according to claim 4 is characterized in that, said MME comprises according to the step of MTC indication information structure FQDN information:

Said MME receives the default APN APN information from home network;

Said MME becomes to meet the said FQDN information of the rule of the residing network of said DNS with said APN information mapping according to said MTC indication information.

6. method according to claim 2 is characterized in that, said MME comprises for said UE selects the step of a M2M gateway from said list of gateways information:

Said MME is that said UE selects a M2M gateway of supporting the MTC function from said list of gateways information according to link weight.

7. according to each described method among the claim 1-6, it is characterized in that said M2M gateway comprises: gateway SGW and/or packet data network gateway PGW.

8. a network access system is characterized in that, comprising: user equipment (UE) and mobile management entity MME, wherein,

Said MME is used to receive the attach request of said UE, and is the machine to machine M2M gateway of said UE selection support MTC function through Machine Type communication MTC indication information;

Said UE is used for being linked into selected M2M gateway through Radio Access Network.

9. system according to claim 8 is characterized in that, also comprises: domain name system DNS, wherein,

Said DNS is used to receive the request message that said MME sends according to the MTC indication information; After receiving described request message, select to support the M2M gateway of MTC function; And to said MME transmission list of gateways information, wherein, the M2M gateway of MTC function supported in said list of gateways information record;

Said MME also is used for after receiving said list of gateways information, is that said UE selects a M2M gateway of supporting the MTC function from said list of gateways information.

10. system according to claim 9 is characterized in that, said MME comprises:

First transmitting element is used for sending the described request message that carries the MTC indication information to said DNS.

11. system according to claim 9 is characterized in that, said MME comprises:

Structural unit is used for the information according to MTC indication information structure full name domain name FQDN;

Second transmitting element is used for the described request message that carries said FQDN information is sent to said DNS.

12. system according to claim 11 is characterized in that, said structural unit comprises:

Receiver module is used to receive the default APN APN information from home network;

Mapping block is used for according to said MTC indication information said APN information mapping being become to meet the said FQDN information of the rule of the residing network of said DNS.

13. system according to claim 9 is characterized in that, said MME comprises:

Selected cell is used for selecting a M2M gateway of supporting MTC function from said list of gateways information for said UE according to link weight.

14. each described system is characterized in that according to Claim 8-13, said M2M gateway comprises: gateway SGW and/or packet data network gateway PGW.