CN102655637A - Mobile communication system and networking method - Google Patents

Abstract

The invention provides a mobile communication system which comprises a wireless local area network (WLAN) and a core network, wherein the WLAN consists of a WLAN access point which accesses the core network by a mobile management entity (MME). The invention further provides a mobile communication system networking method. For the mobile communication system and networking method provided by the invention, the WLAN accesses the core network by the MME which conducts control and management to WLAN users, thus realizing control and management on users in the WLAN.

Description

A kind of GSM and network-building method

Technical field

The present invention relates to wireless communication technology field, more specifically, relate to a kind of GSM and network-building method.

Background technology

The wireless communication technology of extensive use at present mainly comprises 3GPP (Third GenerationPartnership Project; Third generation affiliate tissue) GSM (the Global System forMobile Communications of definition; Global system for mobile communications)/UMTS (Universal MobileTelecommunications System; UMTS)/LTE (Long Term Evolution; Long Term Evolution) and WLAN (the Wireless Local Area Networks of IEEE definition; WLAN), it is the main application form of present radio communication that 3gPP architectural framework and WLAN insert 3GPP core net framework, deployment very extensive.

At first introduce the LTE framework in the 3GPP access system, LTE has adopted and 3G different air interface technology, adopts the air interface design based on OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology.In system, adopted the design philosophy based on packet switching, promptly used shared channel, physical layer no longer provides dedicated channel.System supports FDD (FrequencyDivision Duplexing, FDD) and two kinds of duplex modes of TDD (Time Division Duplexing, time division duplex).Simultaneously, the network architecture of traditional 3G (Third Generation, the third generation) is optimized; Adopt the network configuration of flattening; Access Network only comprises eNode B (evolved Node B, the Node B of evolution are called for short eNB); No longer include RNC (Radio Network Controller, radio network controller).

Whole LTE system by core net (Evolved Packet Core, EPC), (User Equipment, UE) 3 parts are formed for base station (eNodeB) and subscriber equipment.Wherein, EPC is responsible for the core net part, and the EPC signaling process is partly claimed MME (Mobility Management Entity, mobile management entity), and data processing section is called Serving Gateway (gateway is called for short S-GW); ENodeB is responsible for the Access Network part, also claims E-UTRAN (Evolved UMTS Terrestrial Radio AccessNetwork, evolved universal terrestrial radio access network); UE refers to subscriber terminal equipment.

As shown in Figure 1, eNodeB is connected through the S1 interface with EPC; Connect through X2 interface between the eNodeB; ENodeB is connected through the Uu interface with UE.Compare with UMTS, because NodeB and RNC are fused to network element eNodeB, so LTE has lacked Iub interface.X2 interface is similar to the Iur interface, and the S1 interface class is similar to the Iu interface, but bigger simplification is arranged.

The function of eNB comprises: RRM (Radio Resource Management, RRM) function; Compression of IP head and user data stream encryption; MME when UE adheres to selects; The scheduled transmission of paging information; The scheduled transmission of broadcast message; And the measurement etc. that is provided with and provides eNB.

The function of MME comprises: beep-page message sends; Security control; The mobile management of Idle (free time) attitude; The SAE bearer management; And the encryption of NAS (Non-Access Stratum, Non-Access Stratum) signaling and integrity protection etc.

The function of S-GW comprises: the route of data and transmission, and the encryption of user face data.

Introduce Non-3GPP (non-3GPP) access architecture below, as shown in Figure 2.Fig. 2 mainly is the form that inserts the 3GPP core net to WLAN; It typically is the scheme of wlan system and the loose coupling of 3GPP system; Realize that WiFi (Wireless Fidelity, wireless compatibility authentication) user inserts through WiFi in net authentication of the 3GPP system core and charging.Fig. 2 is a kind of typical loose coupling mode; The WiFi network is through AAA (Authentication, the Authorization andAccounting of 3GPP; Authentication and authorization charging) certificate server is realized authentication; And pass through unified BOSS (Business & Operation Support System, the business operation support system) system of Cellular Networks and charge.

Adopt WiFi to carry out the hot zones data distribution, can play certain data service shunting action, but, have following problem owing to be the different standards systems of 2 covers:

1, poor user experience, the network that generally needs the manual selection of user to insert is difficult to realize professional taking over seamlessly between two Access Networks;

2, link-quality is difficult to be guaranteed, and what WiFi adopted is unauthorized ISM (Industrial ScientificMedical, industrial scientific medical) frequency range, the interference between existence and the various devices such as personal WiFi, microwave oven;

3, multi-operator networking simultaneously difficulty, because its working frequency range is unauthorized frequency range, a plurality of operators are when the same area networking, if there is not good coordinating and unifying planning, with causing mutual interference;

4, be difficult to accomplish strict user's control that like QoS (Quality of Service, service quality) management, mobile management etc., the 3GPP core net can not be controlled user's under the WiFi behavior.

Summary of the invention

The technical problem that the present invention will solve provides a kind of GSM and network-building method, realizes the management of core net to wireless local network user.

In order to address the above problem, the invention provides a kind of GSM, comprise WLAN and core net, said WLAN comprises wireless local network connecting point, said wireless local network connecting point inserts said core net through mobile management entity.

Further, said system also can have following characteristics, and said wireless local network connecting point is connected with said mobile management entity through the S1 interface or the redetermination interface of S1 interface or simplification.

Further, said system also can have following characteristics, and said mobile management entity is controlled and managed the terminal in the said WLAN through said wireless local network connecting point based on Non-Access Stratum (NAS) agreement.

Further, said system also can have following characteristics, and said wireless local network connecting point also is used for the NAS message of terminal room in said mobile management entity of transparent transmission and the said WLAN.

Further, said system also can have following characteristics, and said wireless local network connecting point also is used for direct business datum with terminal in the said WLAN and routes to the internet; Perhaps, the business datum with terminal in the said WLAN is routed directly to grouped data network gateway; Perhaps, the business datum with terminal in the said WLAN routes to grouped data network gateway through gateway.

The present invention also provides a kind of GSM network-building method, comprising: wireless local network connecting point inserts core net through mobile management entity.

Further, said method also can have following characteristics, and said wireless local network connecting point is connected with said mobile management entity through the S1 interface or the redetermination interface of S1 interface or simplification.

Further, said method also can have following characteristics, and said method also comprises:

Said mobile management entity is controlled and is managed terminal in the said WLAN through said wireless local network connecting point based on Non-Access Stratum (NAS) agreement.

Further, said method also can have following characteristics, and said method also comprises, the NAS message of terminal room in said mobile management entity of said wireless local network connecting point transparent transmission and the said WLAN.

Further, said method also can have following characteristics, and said method also comprises:

Said wireless local network connecting point directly routes to the internet with the business datum at terminal in the said WLAN; Perhaps, the business datum with terminal in the said WLAN is routed directly to grouped data network gateway; Perhaps, the business datum with terminal in the said WLAN routes to grouped data network gateway through gateway.

GSM provided by the invention and network-building method, WLAN inserts core net through MME, by MME the user of WLAN is controlled and manages, and realization is controlled to user's in the WLAN.

Description of drawings

Fig. 1 is the LTE SNA;

Fig. 2 is the Non-3gPP access architecture;

Fig. 3 is the communication system network architecture figure that the present invention provides;

Fig. 4 is the WIFI protocol stack structure after the present invention adds the NAS layer;

Fig. 5 is the structure that adds the NAS layer under the general protocol stack scene of the present invention;

Fig. 6 is that user of the present invention initiates the service request flow chart.

Embodiment

Core concept of the present invention is: WLAN inserts EPC through MME.

The present invention provides a kind of GSM, comprises WLAN and core net, and WLAN comprises wireless local network connecting point, and wireless local network connecting point inserts core net through MME.

Further, wireless local network connecting point (AP) is connected and communication with MME through the S1 interface of S1 interface or simplification or the interface of redetermination.

Further, MME controls and manages the terminal in the WLAN through wireless local network connecting point based on the NAS agreement.Said wireless local network connecting point also is used for the NAS message of terminal room in said mobile management entity of transparent transmission and the said WLAN.

Further, said wireless local network connecting point also is used for directly the business datum at terminal in the said WLAN is routed to the internet; Perhaps, the business datum with terminal in the said WLAN is routed directly to grouped data network gateway; Perhaps, the business datum with terminal in the said WLAN routes to grouped data network gateway through gateway.

Further, the protocol stack of WLAN and correlation technique can be based on IEEE 802.11 series, Wimax, UMTS, LTE/LTE-A etc.

The present invention adopts the non-3gPP access technology at eat dishes without rice or wine (wave point between wireless local network connecting point and the terminal), like WIFI, Wimax or other wireless local area network technologies.

Wireless local network connecting point up is connected to the 3gPP core net; Be different from the mode (mode that existing WLAN inserts the 3GPP core net is to be directly connected to P-GW (grouped data network gateway)) that existing WLAN inserts the 3GPP core net; Wireless local network connecting point and MME connect, and this interface can directly utilize existing S1 interface protocol, also can design new interface protocol; Perhaps on the basis of existing S1 interface protocol, simplify an implementation part controlled function.

The terminal through wireless local network connecting point realize with MME between NAS is connected and corresponding N AS process, realization is controlled to the user's.

Further, MME can inquire about and utilize the information of preserving among the HSS (HomeSubscriber Server, home subscriber server) in the control procedure of carrying out the terminal.

The present invention also provides a kind of GSM network-building method, comprising: wireless local network connecting point inserts core net through mobile management entity.

Wherein, said wireless local network connecting point is connected with said mobile management entity through the S1 interface or the redetermination interface of S1 interface or simplification.

Wherein, said method also comprises: said mobile management entity is controlled and is managed terminal in the said WLAN through said wireless local network connecting point based on Non-Access Stratum (NAS) agreement.

Wherein, the NAS message of terminal room in said mobile management entity of said wireless local network connecting point transparent transmission and the said WLAN.

Wherein, said method also comprises: said wireless local network connecting point directly routes to the internet with the business datum at terminal in the said WLAN; Perhaps, the business datum with terminal in the said WLAN is routed directly to grouped data network gateway; Perhaps, the business datum with terminal in the said WLAN routes to grouped data network gateway through gateway.

Fig. 3 is the network architecture diagram that the present invention provides; LTE LAN AP (Long Term Evolution LAP LAN Access Point; Be a kind of wireless local network connecting point) connect EPC, concrete, LTE LAN AP sets up chain of command with MME and is connected; Insert 3GPP core net (up continuing to be connected to HSS) through MME, to realize user's precision management and control.

For the connection of user plane, how the present invention is connected to EPC for LTE LAN AP on user plane does not limit, and therefore following several kinds of data routing modes are arranged here:

Mode 1:LTE LAN AP can realize LIPA (Local IP Access, the local IP inserts) function among the similar 3GPP, is routed to Internet (internet) by this locality; A L-GW (local IP IAD) is in logic just arranged in LTE LANAP inside, and the local network that data will be through the L-GW route also can be gone out Internet through local network.

Mode 2: can adopt the mode in the existing non-3GPP access architecture, LTE LAN AP is directly connected to P-GW, and data are routed directly to P-GW.

Mode 3: also can be connected to S-GW, be routed to P-GW by S-GW again according to the mode of 3GPP access architecture.

LTE LAN AP is as the Access Network sole entity, realizes all or part of in the following function:

1) RRM function, resource allocation and scheduling;

2) compression of IP head and user data stream encryption, safety of data and raising efficiency of transmission guarantee to eat dishes without rice or wine;

MME when 3) UE adheres to selects; The scene that connects a plurality of MME to LTE LAN AP.

4) scheduled transmission of paging information;

5) scheduled transmission of broadcast message;

6) be provided with and provide the measurement of eNB;

7) transmission of data and reception;

8) optional, can also realize functions such as data route and IP address assignment.

The function of EPC mainly comprises user's authentication, mobile management, data and signaling encryption etc., through these control, realizes management and control and accurate billing operation to the user.Concrete, above-mentioned EPC function is mainly undertaken by MME entity and HSS entity;

The function of MME comprises:

1) the interface connection management between LTE LAN AP and the MME is such as S1 interface connection management;

2) security control;

3) mobile management of Idle attitude;

4) NAS process; Like service request process (whether admitting this Client-initiated business), authentication process, attaching process etc.

5) encryption of NAS signaling and integrity protection;

6) user's switching controls under the MME etc.

Above-mentioned functions can selectively be supported according to the characteristic of business, and as only realizing the authentication at terminal, then MME need not carry out other functions such as user's switching controls.

The function of HSS comprises:

1) mobile management (this function in order to support the user in the CS territory, the moving of PS territory and IM core domain);

2) generate user security information (this function can generate the user authentication data of CS territory, PS territory and IM core domain, Integrity Key and encryption key);

3) (HSS generates the verify data of CS territory, PS territory and IM core domain to user security; Behind Integrity Key and the encryption key, to the related entities of core domain (be MSC/VLR, SGSN; 3GPP AAAServer or CSCF) these data are provided, accomplish authentication is carried out in user's access;

4) ID handles that (HSS can provide the relation of all signs of user in the system, and can only definite user, confirms that user's method is: in the CS territory according to IMSI and MSISDN; In the PS territory according to IMSI, MSISDN and IP address; In the IM core domain according to private user identity and public user identity);

5) (HSS is receiving MSC/VLR, SGSN to access authentication.During the request of 3GPP AAA Server or CSCF, whether can roam into access zone network, mobile access authentication is provided) the user through the inspection user;

6) business authentication (HSS not only provides Basic Authentication to MT call setup and calling service, and also to MSC/VLR, SGSN, 3GPP AAA Server provides relevant business change information with entities such as CSCF).

Be the change of example (pointing to the Non-3gPP AP among Fig. 4) description protocol stack below with WIFI:

As shown in Figure 4, except that PHY, MAC, increased the NAS protocol layer in this protocol stack.

Fig. 5 is a more general protocol stack structure, and wherein PHY, MAC are protocol layer indispensable in all access technologies basically, then can be used as optional level as for above RLC, PDCP and RRC.The present invention is primarily aimed at the adding of NAS layer, does not limit for the protocol hierarchy of Access Layer.

In existing WIFI technology, terminal and AP two protocol layers only below application layer: PHY layer and MAC layer; Since WIFI to user management very a little less than, and can be linked into wide variety of different types of core net, therefore do not consider the controlled function of core net to the user.

Therefore, in order to improve the control ability of network (operator), need to introduce a new protocol hierarchy to the user; The present invention uses for reference the saying among the 3GPP; Still be the NAS layer,, can understand the content among the NAS for WIFI AP; Only carry out the transparent transmission of NAS signaling, to assist realizing that the control information between UE and the core net is mutual.

Accordingly; Need to introduce the S1 interface between AP and the MME and set up process, when AP prepares to be connected into the 3GPP core net, through operator's configuration or user applies; To carry out S1 between AP and the MME and be connected foundation; And possibly carry out S1 and connect and to reshuffle and process such as release, simultaneously, also need introduce processes such as load control and other abnormality processing.

After the S1 of WIFI AP and MME interface is set up successfully; In the process of UE access network; WIFI AP will select MME and consult to set up the S1 that is directed against this UE with MME to carry for this UE, and MME carries out authentication, authentication operation to this user then, and detailed process can be with reference to the way of 3GPP.The validated user that has only the MME authentication to pass through could connecting system.

Be some concrete functions that MME accomplishes below, embodied management and control the user:

Authentication process:

This process is accomplished the identity identification to the user who initiates service request and is identified, and guarantees that the type of service that the user asks is that this user is given in network authorization.

The admittance process:

The purpose of admittance process is whether the judgement requested resource is enough, and reserves respective resources.

Attaching process:

UE or user if hope to receive the business that just can provide after the registration, need register in network.At initial attaching process, MME obtains the mobile device sign of UE, and inquires about to EIR (Equipment Identity Register, device identification registration).And for the IP that guarantees always-on connects, the EPS that also can set up an acquiescence at initial attaching process carries.

Security control:

Security control comprises: it is professional to guarantee not set up unauthorized EPS, guarantees the confidentiality of ID, guarantees the confidentiality of user data and signaling, and the integrity protection of signaling is provided.

Mobility management process:

The purpose of mobile management function is the current location that keeps following the tracks of certain user.

Be the next terminal of the system architecture business of triggering request process that the present invention provides below, as shown in Figure 6, comprising:

Give MME 1.UE send NAS message Service Request (service request) through LTE LAN AP; Wherein NAS message can be included in RRC (Radio Resource control) signaling, and LTE LANAP does not understand the NAS message of UE;

2.LTE this NAS message of LAN AP transparent transmission is given MME.Include the sign of sub-district, the information such as temporary mark at terminal in this NAS message;

3.MME this UE is carried out NAS authentication and fail safe detection;

4.MME send S1-AP (S1 Application Protocol; S1 Application Protocol) Initial ContextSetup Request (initial context foundation request) is to LTE LAN AP, comprising the cell list of user face data routing iinformation, QoS (service quality) attribute of EPS carrying, the hereinafter of being correlated with safely, MME signaling connection identifier, restriction switching.This step will be in the EPS carrying of all existence of eating dishes without rice or wine to activate with the S1 interface.

5.LTE LAN AP accomplishes radio bearer and sets up process.

6.UE upstream data can begin transmission, LTE LAN AP will select to give which entity with data forwarding according to the routing iinformation that MME confirms.Among the present invention, on user plane, how to be connected to EPC for LTE LAN AP and not limit, therefore following several kinds of data routing modes are arranged here:

Mode 1:LTE LAN AP can realize the LIPA function among the similar 3GPP, is routed to Internet by this locality; Just in LTE LAN AP inside a L-GW is in logic arranged, the local network that data will be through the L-GW route also can be gone out Internet through local network.

Mode 2: can adopt the mode in the existing non-3GPP access architecture, LTE LAN AP is directly connected to P-GW; Data are routed directly to P-GW.

Mode 3: also can be connected to S-GW, be routed to P-GW by S-GW again according to the mode of 3GPP access architecture.Wherein, shown in Figure 6 is mode 3.

7.LTE LAN AP sends a S1-AP Initial Context Setup Complete (the S1-AP initial context is set up and accomplished) message and gives MME; The EPS bearing identification, the S1 TEID (Tunnel End PointIdentifier, tunneling termination sign) that wherein comprise the address of LTE LAN AP, received EPS bearing identification, refusal.

Give S-GW 8.MME send Modify Bearer Request (bearing modification request) message; Wherein comprise the descending S1 TEID that carry the address of LTE LAN AP, the EPS that accepted; The downlink data packet notice request, the RAT (Radio Access Type, wireless access type) that postpone.At this moment, S-GW can begin the transmitting downlink data bag and given UE.

Give MME as response 9.S-GW send Modify Bearer Response (bearing modification response) message, process finishes.

Claims (10)

1. a GSM comprises WLAN and core net, and said WLAN comprises wireless local network connecting point, it is characterized in that, said wireless local network connecting point inserts said core net through mobile management entity.

2. the system of claim 1 is characterized in that,

Said wireless local network connecting point is connected with said mobile management entity through the S1 interface or the redetermination interface of S1 interface or simplification.

3. the system of claim 1 is characterized in that,

Said mobile management entity is controlled and is managed the terminal in the said WLAN through said wireless local network connecting point based on Non-Access Stratum (NAS) agreement.

4. system as claimed in claim 3 is characterized in that,

Said wireless local network connecting point also is used for the NAS message of terminal room in said mobile management entity of transparent transmission and the said WLAN.

5. like the arbitrary described system of claim 1 to 4, it is characterized in that said wireless local network connecting point also is used for direct business datum with terminal in the said WLAN and routes to the internet; Perhaps, the business datum with terminal in the said WLAN is routed directly to grouped data network gateway; Perhaps, the business datum with terminal in the said WLAN routes to grouped data network gateway through gateway.

6. a GSM network-building method is characterized in that, comprising: wireless local network connecting point inserts core net through mobile management entity.

7. method as claimed in claim 6 is characterized in that,

Said wireless local network connecting point is connected with said mobile management entity through the S1 interface or the redetermination interface of S1 interface or simplification.

8. method as claimed in claim 6 is characterized in that, said method also comprises:

Said mobile management entity is controlled and is managed terminal in the said WLAN through said wireless local network connecting point based on Non-Access Stratum (NAS) agreement.

9. method as claimed in claim 8 is characterized in that, said method also comprises, the NAS message of terminal room in said mobile management entity of said wireless local network connecting point transparent transmission and the said WLAN.

10. like the arbitrary described method of claim 6 to 9, it is characterized in that said method also comprises:

Said wireless local network connecting point directly routes to the internet with the business datum at terminal in the said WLAN; Perhaps, the business datum with terminal in the said WLAN is routed directly to grouped data network gateway; Perhaps, the business datum with terminal in the said WLAN routes to grouped data network gateway through gateway.

Images