WO2016101616A1

WO2016101616A1 - Park service access method, device and system

Info

Publication number: WO2016101616A1
Application number: PCT/CN2015/085355
Authority: WO
Inventors: 钟哲英
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-26
Filing date: 2015-07-28
Publication date: 2016-06-30
Also published as: CN105792199A

Abstract

Disclosed are a campus service access method, device and system, the campus service access method comprising: a mobile management entity (MME) acquires access point name (APN) information and campus information of a user terminal; the MME performs determination processing according to APN bearing information established by the user terminal, the HeNB capability and HSS number allocation property; and the MME establishes a link to access a campus local service via a local gateway (L-GW), or the MME modifies the related bearing information of a server gateway (S-GW) and the L-GW to conduct data channel switching, thus addressing the problems of poor continuity and mobility of IP data when a user terminal moves between the campuses, improving the continuity and mobility of the IP data, and achieving seamless switching between the inside and the outside of the campus.

Description

Method, device and system for campus business access

Technical field

The present invention relates to the field of communications, and in particular, to a method, device, and system for accessing a campus service.

Background technique

The Local IP Access (LIPA) connection is mainly used for a single residential or enterprise network. The LIPA technology proposed by the 3GPP protocol can separate the user's local service data directly from the base station of the campus (home/enterprise). On the one hand, it avoids the pressure on the core network after the rapid increase of IP data traffic, and on the other hand, the IP is improved. The routing efficiency of the packet. This not only reduces the burden on the core network, reduces the core network throughput and transmission cost of the operator, but also reduces the data transmission delay of the user's local data access. The LIPA technology is an enhancement to the function of the Home Node B (HeNB), which allows the terminal to directly access the IP resources inside the campus through the HeNB. It is usually used by the operator to build campus services based on HeNB.

The 23.401 protocol of 3GPP explicitly states that the connection enabling LIPA does not support Handover (referred to as HO):

When the X2 interface is HO, the Mobile Management Entity (MME) receives the Path Switch Request message. If the MME determines that the LIPA connection is not released, the MME replies with the path switch request failure message. Switch Request Failure message) to the target HeNB;

When the S1 interface H0, the MME receives the handover request message (Handover Request message). If the MME determines that the LIPA connection is not released, the MME returns a Handover Failure (Cause) message to the target HeNB.

The 23.859 protocol of 3GPP gives the LIPA mobility proposal and gives the selection and addressing method of the Local Gateway Way (LGW). The proposal pointed out that MME can choose LGW through the following two methods:

Based on the Domain Name System (DNS): The LGW is initially powered on. After obtaining the IP address from the Serving Gateway (S-GW), the LGW registers with the DNS server. The registration includes: Local Network ID (Local) H(e)NB Network identifier is abbreviated as LHN ID), local network The address (L-GW@Local network address is abbreviated as L-GW@LN) or the Fully Qualified Domain Name (L-GW local FQDN) of the local network, and the L-GW@CN address assigned by the S-GW. The MME initiates a DNS request to the DNS server when receiving the Public Data Network (PDN) connection request of the LIPA of the user UE, and the DNS server returns one or more LGW IP addresses that meet the conditions to the MME;

Based on the radio access network (Radio Access Network, RAN for short): Each HeNB itself configures all L-GW@LN addresses or FQDNs that are connected to the LGW. The HeNB obtains the L-GW@CN address through the Sxx port. The HeNB reports the L-GW@CN address or FQDNs to the MME through the S1 message. The L-GW table (List) provided by the core network MME in the HeNB based on the Access Point Name (APN) and the Local H(e)NB Network ID (LHN ID) Choose an L-GW.

The 23.859 protocol of 3GPP proposes how to ensure the continuity of the IP data session when the LIPA connection moves between the eNB/HeNB supporting LIPA when the UE moves within the campus (home/enterprise). However, there is no way to deal with how to access campus services outside the campus, or how to handle the mobility of eNB/HeNB (inside and outside the campus) where LIPA capabilities are inconsistent.

In the related art, when the user terminal moves between campuses, the continuity of IP data and the problem of poor mobility have not yet proposed an effective solution.

Summary of the invention

The present invention provides a method, apparatus and system for accessing a campus service, with at least one of the above problems.

According to an embodiment of the present invention, a method for accessing a campus service is provided, including: a mobility management entity MME acquiring an access point name APN information and a campus information of a user terminal; and the MME obtaining a valid subscription from a home location register HSS Obtaining, by the MME, whether the APN that the user terminal requests to access supports the local IP access LIPA; the MME receives whether the acquisition of the user terminal supports the LIPA bearer information; and the MME is established according to the user terminal. The APN bearer information, the HeNB capability, and the attributes of the HSS number are judged; the MME establishes a relationship between the link base station and the local gateway L-GW according to the base station capability of the user terminal, and allows the user to Accessing the local service of the campus, or the MME modifies the relevant bearer information of the server gateway S-GW and the L-GW, establishes a link channel of the SGW and the LGW, and completes the switching of the data channel.

In an embodiment of the present invention, the acquiring, by the mobility management entity MME, the access point name APN information and the campus information of the user terminal includes: in the case of the public data network coverage of the user terminal, initiating a local connection to the MME APN information and park information.

In the embodiment of the present invention, the MME performs a determination process according to the APN bearer information, the HeNB capability, and the attributes of the HSS number set that the user terminal has established; the MME selects an appropriate link to pass. The access of the local gateway L-GW to the local service of the campus includes: when the APN requested by the user terminal supports the LIPA, and the HeNB in the campus does not support the LIPA, or the APN requested by the user terminal supports the LIPA, The HeNB in the campus also supports the LIPA, and the MME requests the access to the campus to be inconsistent with the campus to which the user terminal belongs; the MME queries the domain name system DNS server for the user terminal according to the APN information and the campus information carried by the user terminal. L-GW@LN, L-GW@CN List/Full Qualified Domain Name Full Name FQDNs information of the applied campus APN; the MME creates a L-GW session, and the MME sends a bearer installation message to the HeNB, where The user plane data channel of the HeNB communicates with the L-GW through the S-GW; the MME uses the S-GW@LN address of the S-GW and the TEID of the S-GW tunnel endpoint as the parameters of the internal channel of the L-GW. Brought to the L-GW for the end of the user The terminal accesses the data service in the park through the data channel of the S-GW and the L-GW outside the campus.

In the embodiment of the present invention, the MME performs a judgment process according to the APN bearer information, the HeNB capability, and the attributes of the HSS number set that the user terminal has established, and the MME modifies the server gateway S-GW. And the L-GW related bearer information, and the data channel switching includes: when the user terminal does not support the LIPA connection park to support the HO handover in the LIPA connection campus, the target HeNB supports the LIPA function in the campus. The MME obtains the local base station network LHN ID or the L-GW@CN List/FQDNs and the HeNB@LN address; the APN currently established by the user terminal and the L-GW of the campus have a bearer establishment, and the target HeNB supports Establishing a LIPA connection with the L-GW accessed by the user terminal, the MME establishing a LIPA channel for the HeNB and the L-GW for the user terminal; the MME modifying the bearer information of the S-GW, and modifying the S-GW@LN address The tunnel endpoint of the /S-GW identifies the TEID of the HeNB@LN/HeNB and modifies the associated bearer information of the L-GW; the MME sends the associated identity Correlation-ID to the target HeNB, and the Correlation-ID includes the L- GW@LN address/TEID of the internal tunnel of the L-GW, used for Standard HeNB user plane data through the channel connected to the target HeNB L-GW.

In the embodiment of the present invention, the MME performs a judgment process according to the APN bearer information, the HeNB capability, and the attributes of the HSS number set that the user terminal has established, and the MME modifies the server gateway S-GW. And the related bearer information of the L-GW, and the switching between the inbound and outbound data channels includes: the APN established by the user terminal UE when the user terminal supports the handover from the LIPA connection campus to the outside of the LIPA campus. Supporting the establishment of the LIPA connection by the L-GW bearer of the campus, but the target HeNB outside the campus does not support the establishment of the LIPA connection with the L-GW accessed by the mobile terminal; the MME modifies the bearer information of the S-GW, and modifies The TEID of the HeNB@LN/HeNB is the TEID of the S-GW@LN address/S-GW, and the related bearer information of the L-GW is modified; the MME establishes a channel with the L-GW through the S-GW, and the user of the HeNB The surface data channel is connected to the L-GW through the S-GW.

In the embodiment of the present invention, the HO handover includes: HO handover of the X2 interface; the S1 interface HO handover procedure and the Sxx interface, that is, the signaling transmission of the support control plane, and the message transmission HO handover of the user plane.

In an embodiment of the present invention, the campus information includes at least one of the following: an LHN ID, an LGW@CN List, an IP address of an internal channel of the HeNB, a HeNB@LN IP Addr, and a TEID of an internal channel of the HeNB.

According to another embodiment of the present invention, an apparatus for accessing a campus service is further provided, comprising: an obtaining module, configured to acquire, by the mobility management entity MME, an access point name APN information and a campus information of the user terminal; and a support module, The MME is configured to obtain valid subscription information from the home location register HSS, and learn whether the APN requested by the user terminal supports local IP access LIPA; and the base station module is configured to receive, by the MME, the user terminal to attach Whether the acquisition supports the LIPA bearer information; the determining module is configured to determine, according to the APN bearer information that the user terminal has established, the HeNB capability, and the attributes of the HSS numbering; the access module sets The MME establishes a relationship between the link base station and the local gateway L-GW according to the base station capability of the user terminal, and allows the user to access the local service of the campus, or the MME modifies the server gateway S-GW and L- The bearer channel of the GW is established, and the link channel of the SGW and the LGW is established, and the switching of the data channel is completed.

In an embodiment of the invention, the obtaining module is further configured to initiate locally connected APN information and campus information to the MME in case the public data network coverage of the user terminal.

In an embodiment of the present invention, the APN that the user terminal requests to access supports the LIPA, and the HeNB in the campus does not support the LIPA, or the APN requested by the user terminal supports the LIPA, and the HeNB in the campus The LIPA is also supported. If the campus to which the user is requested is inconsistent with the campus to which the user terminal belongs, the determining module is configured to query the domain name system DNS server according to the APN information and the campus information carried by the user terminal. The L-GW@LN, L-GW@CN List/Full Qualified Domain Name FQDNs information of the campus APN that the user terminal applies for; the access module is configured to create the MME and the L-GW session, and the MME delivers the bearer. The installation message is sent to the HeNB, where the user plane data channel of the HeNB communicates with the L-GW through the S-GW; the access module is configured to set the S-GW@LN address and S of the S-GW by the MME. The GW tunnel endpoint identification TEID is carried to the L-GW as a parameter of the internal channel of the L-GW, and is used for the user terminal to perform intra-satellite data service access through the data channels of the S-GW and the L-GW in and out of the garden.

In the embodiment of the present invention, if the user terminal does not support the LIPA connection outside the campus and supports the HO handover in the LIPA connection campus, if the target HeNB supports the LIPA function in the campus, the determining module The MME obtains the local base station network LHN ID or the L-GW@CN List/FQDNs and the HeNB@LN address; the access module is configured to be carried by the APN currently established by the user terminal and the L-GW of the campus. Established, and the target HeNB supports establishment of an L-GW connected to the user terminal The LIPA is connected, and the MME establishes a LIPA channel of the HeNB and the L-GW to the user terminal; the access module is configured to modify the bearer information of the S-GW by the MME, and modify the tunnel of the S-GW@LN address/S-GW The endpoint identifies the TEID as the TEID of the HeNB@LN/HeNB, and modifies the related bearer information of the L-GW. The access module is configured to send the associated identity Correlation-ID to the target HeNB, and the Correlation-ID includes the L- The TEID of the internal tunnel of the GW@LN address/L-GW, and the user plane data channel for the target HeNB is connected to the target HeNB through the L-GW.

In the embodiment of the present invention, the user terminal supports the establishment of the LIPA connection of the L-GW of the campus by the APN established by the user terminal UE in the case that the user terminal supports the handover from the LIPA connection campus to the outside of the LIPA campus. If the target HeNB outside the campus does not support the establishment of the LIPA connection with the L-GW accessed by the mobile terminal, the access module is configured to modify the bearer information of the S-GW by the MME, and modify the HeNB@LN/HeNB. The TEID is the TEID of the S-GW@LN address/S-GW, and modifies the relevant bearer information of the L-GW; the access module is configured to set up, by the S-GW, the channel of the L-GW through the S-GW, and the HeNB The user plane data channel is connected to the L-GW through the S-GW.

According to still another embodiment of the present invention, there is provided a system for accessing a campus service, comprising: the apparatus of any of the above.

The MME obtains the access point name APN information and the campus information of the user terminal by using the mobility management entity MME. The MME obtains the valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports the local IP address. Accessing the LIPA; the MME receives whether the acquisition of the user terminal supports the LIPA bearer information; the MME determines according to the APN bearer information, the HeNB capability, and the attributes of the HSS number that have been established by the user terminal. The MME establishes a relationship between the link base station and the local gateway L-GW, so that the user accesses the local service of the campus, or the MME modifies the server gateways S-GW and L according to the base station capability of the user terminal. - The relevant bearer information of the GW, establish a link channel of the SGW and the LGW, and complete the switching of the data channel. The problem that the continuity of the IP data and the mobility are poor when the user terminal moves between the campuses is solved, the continuity and mobility of the IP data are improved, and seamless switching between the inside and outside of the campus is realized.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method for accessing a campus service according to an embodiment of the present invention;

2 is a structural block diagram of an apparatus for accessing a campus service according to an embodiment of the present invention;

3 is a schematic diagram of a comparative description of accessing a campus network inside and outside a campus according to a preferred embodiment of the present invention;

4 is a schematic diagram of a process for a UE to perform an access request for a campus APN outside a campus according to a preferred embodiment of the present invention;

5 is a schematic diagram of an X2 HO process in a campus outbound campus in accordance with a preferred embodiment of the present invention;

6 is a schematic diagram of an X2 HO process outside a campus in a campus in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In this embodiment, a method for accessing a campus service is provided. FIG. 1 is a flowchart of a method for accessing a campus service according to an embodiment of the present invention. As shown in FIG. 1 , the process includes the following steps:

Step S102: The mobility management entity MME acquires the access point name APN information and the campus information of the user terminal.

Step S104: The MME obtains valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports local IP access to the LIPA.

Step S106: The MME receives whether the acquisition of the user terminal attachment supports LIPA bearer information.

Step S108: The MME performs a determination process according to the APN bearer information that the user terminal has established, the HeNB capability, and the attribute of the HSS number.

Step S110: The MME establishes a relationship between the link base station and the local gateway L-GW according to the base station capability of the user terminal, and allows the user to access the local service of the campus, or the MME modifies the server network. The related bearer information of the S-GW and the L-GW is set, the link channel of the SGW and the LGW is established, and the switching of the data channel is completed.

Through the above steps, the mobility management entity MME is used to obtain the access point name APN information and the campus information of the user terminal; the MME obtains valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports the local IP address. Accessing the LIPA; the MME receives whether the acquisition of the user terminal supports the LIPA bearer information; the MME performs the judgment processing according to the APN bearer information that the user terminal has established, the HeNB capability, and the attributes of the HSS number; The MME establishes a relationship between the link base station and the local gateway L-GW, and allows the user to access the local service of the campus, or the MME modifies the relevant bearer information of the server gateway S-GW and the L-GW. Establish a link channel between the SGW and the LGW to complete the switching of the data channel. The problem that the continuity of the IP data and the mobility are poor when the user terminal moves between the campuses is solved, the continuity and mobility of the IP data are improved, and seamless switching between the inside and outside of the campus is realized.

In this embodiment, the mobile management entity MME acquiring the access point name APN information and the campus information of the user terminal may include: initiating the locally connected APN information to the MME in the case that the user terminal is over the public data network coverage Park information.

In this embodiment, the MME performs a determination process according to the APN bearer information that the user terminal has established, the HeNB capability, and the attributes of the HSS number; the MME selects an appropriate link to the campus through the local gateway L-GW. The service access includes: the APN requested to be accessed by the user terminal supports LIPA, and the HeNB in the campus does not support LIPA, or the APN requested by the user terminal supports LIPA, and the HeNB in the campus also supports LIPA, requesting access. If the campus is inconsistent with the campus to which the user terminal belongs;

The MME queries the domain name system DNS server for the L-GW@LN, L-GW@CN List/full qualified domain name FQDNs information of the campus APN applied by the user terminal according to the APN information and the campus information carried by the user terminal;

The MME creates an L-GW session, and the MME sends a bearer installation message to the HeNB, where the user plane data channel of the HeNB communicates with the L-GW through the S-GW;

The MME brings the S-GW@LN address of the S-GW and the S-GW tunnel endpoint identification TEID to the L-GW as parameters of the internal channel of the L-GW, and the user terminal passes the S-GW and the L outside the campus. - GW's data channel for in-plant data service access.

In another embodiment, in the case that the user terminal does not support the LIPA connection outside the campus to support the HO handover in the LIPA connection campus, if the target HeNB supports the LIPA function in the campus, the MME acquires the local base station network LHN ID. Or L-GW@CN List/FQDNs, HeNB@LN address;

The APN currently established by the user terminal and the L-GW of the campus have a bearer establishment, and the target HeNB supports establishing an LIPA connection with the L-GW accessed by the user terminal, and the MME establishes the HeNB and the L-GW for the user terminal. LIPA channel;

The MME modifies the bearer information of the S-GW, and modifies the TEID of the tunnel endpoint identification TEID of the S-GW@LN address/S-GW to be the HeNB@LN/HeNB, and modifies the relevant bearer information of the L-GW;

The MME sends an association identity Correlation-ID to the target HeNB, where the Correlation-ID includes the TEID of the L-GW@LN address/L-GW internal tunnel, and the user plane data channel of the target HeNB passes through the L-GW and the target HeNB. Connected.

In another embodiment, if the user terminal supports the handover from the LIPA connection campus to the outside of the LIPA campus, the APN established by the user terminal UE supports the establishment of the LIPA connection of the L-GW of the campus, but outside the campus. The target HeNB does not support the establishment of a LIPA connection with the L-GW accessed by the mobile terminal;

The MME modifies the bearer information of the S-GW, and modifies the TEID of the HeNB@LN/HeNB to the TE-ID of the S-GW@LN address/S-GW, and modifies the relevant bearer information of the L-GW;

The MME establishes a channel with the L-GW through the S-GW, and the user plane data channel of the HeNB is connected to the L-GW through the S-GW.

In the foregoing embodiment, the HO handover includes: HO handover of the X2 interface; the S1 interface HO handover procedure and the Sxx interface, that is, the signaling transmission of the support control plane, and the message transmission HO handover of the user plane.

In the foregoing embodiment, the campus information includes at least one of the following: an LHN ID, an LGW@CN List, an IP address of an internal channel of the HeNB, HeNB@LN IP Addr, and a TEID of an internal channel of the HeNB.

In the embodiment, a device for accessing the campus service is provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of an apparatus for accessing a campus service according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:

The obtaining module 202 is configured to acquire, by the mobility management entity MME, an access point name APN information and a campus information of the user terminal;

The support module 204 is configured to: the MME obtains valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports local IP access LIPA;

The base station module 206 is configured to receive, by the MME, whether the acquisition of the user terminal attachment supports LIPA bearer information;

The determining module 208 is configured to determine, according to the APN bearer information that the user terminal has established, the HeNB capability, and the attribute of the HSS number.

The access module 210 is configured to establish, according to the base station capability of the user terminal, the relationship between the link base station and the local gateway L-GW, so that the user accesses the local service of the campus, or the MME modifies the server gateway S-GW. The bearer channel of the SGW and the LGW is established, and the data channel is switched.

The MME obtains the access point name APN information and the campus information of the user terminal by using the MME. The MME obtains the valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports the local IP address. Accessing the LIPA; the MME receives whether the acquisition of the user terminal supports the LIPA bearer information; the MME performs a judgment process according to the APN bearer information that the user terminal has established, the HeNB capability, and the attribute of the HSS number; The base station capability of the user terminal, the MME establishes a relationship between the link base station and the local gateway L-GW, and allows the user to access the local service of the campus, or the MME modifies the related bearers of the server gateway S-GW and the L-GW. Information, establish a link channel between the SGW and the LGW, and complete the switching of the data channel. The problem that the continuity of the IP data and the mobility are poor when the user terminal moves between the campuses is solved, the continuity and mobility of the IP data are improved, and seamless switching between the inside and outside of the campus is realized.

In this embodiment, the obtaining module 202 is further configured to initiate locally connected APN information and campus information to the MME in case the public data network coverage of the user terminal.

In this embodiment, when the APN requested by the user terminal supports LIPA, the HeNB in the campus does not support LIPA, or the APN requested by the user terminal supports LIPA, and the HeNB in the campus also supports LIPA, requesting to connect. If the entered campus is inconsistent with the campus to which the user terminal belongs;

The determining module 208 is configured to query the domain name system DNS server for the L-GW@LN of the campus APN requested by the user terminal according to the APN information and the campus information carried by the user terminal, and the L-GW@CN List/full qualified domain name FQDNs information;

The access module 210 is configured to create an L-GW session with the L-GW, and the MME sends a bearer installation message to the HeNB, where the user plane data channel of the HeNB communicates with the L-GW through the S-GW.

The access module 210 is configured to bring the S-GW@LN address of the S-GW and the S-GW tunnel endpoint identification TEID to the L-GW as parameters of the internal channel of the L-GW, and the user terminal is used in the park. In-garage data service access is performed through the data channels of the S-GW and the L-GW.

In this embodiment, in the case that the user terminal does not support the LIPA connection outside the campus and supports the HO handover in the LIPA connection campus, if the target HeNB supports the LIPA function in the campus, the determining module 208 is configured to obtain the MME. Local base station network LHN ID or L-GW@CN List/FQDNs, HeNB@LN address;

The access module 210 is configured to establish a bearer between the APN currently established by the user terminal and the L-GW of the campus, and the target HeNB supports establishing an LIPA connection with the L-GW accessed by the user terminal, and the MME establishes a LIPA connection to the user terminal. LIPA channel of HeNB and L-GW;

The access module 210 is configured to modify the bearer information of the S-GW, modify the tunnel endpoint identification TEID of the S-GW@LN address/S-GW to be the TEID of the HeNB@LN/HeNB, and modify the related bearer information of the L-GW. ;

The access module 210 is configured to send the association identity Correlation-ID to the target HeNB, where the Correlation-ID includes the TEID of the internal tunnel of the L-GW@LN address/L-GW, and the user plane data channel of the target HeNB is passed. The L-GW is connected to the target HeNB.

In this embodiment, when the user terminal supports the handover from the LIPA connection campus to the outside of the LIPA campus, the APN established by the user terminal UE supports the establishment of the LIPA connection of the L-GW of the campus, but the target outside the campus. The HeNB does not support the establishment of a LIPA connection with the L-GW accessed by the mobile terminal;

The access module 210 is configured to modify the bearer information of the S-GW, modify the TEID of the HeNB@LN/HeNB to be the TEID of the S-GW@LN address/S-GW, and modify the related bearer information of the L-GW;

The access module 210 is configured to establish a channel with the L-GW through the S-GW, and the user plane data channel of the HeNB is connected to the L-GW through the S-GW.

In this embodiment, a system for accessing a campus service is provided, including: the device of any of the above. The above device can implement the above method.

The following is a detailed description in conjunction with the preferred embodiments and implementation scenarios.

The purpose of the preferred embodiment is to provide a method for accessing campus services outside the campus and to provide a method for supporting continuity of IP data when users (UEs) move between campus intranets. The principle is that the MME selects the LGW accessed by the UE according to the APN/LHN ID information reported by the UE, and selects whether to support according to the L-GW@CN address or the LHN ID (Local H(e)NB Network ID) information reported by the HeNB. LIPA function. When the UE accesses outside the campus, the MME chooses to use a non-LIPA channel for local LGW access. When the UE accesses in the campus, the MME chooses to use the LIPA channel to access the local LGW. When the UE moves in an eNB/HeNB (inside and outside the campus) where the LIPA capabilities are inconsistent, the MME performs a data channel switching operation.

The method includes the following steps:

The first step: After the LGW is powered on, the registration of the DNS server is completed.

The second step: the UE initiates an access request of the campus APN. If the UE needs to connect to the campus during the initial access, the Ciphered Options Transfer Flag is set in the Attach request message, and the MME sends the message to the UE. The Ciphered Options are obtained, and the UE brings the Ciphered Options to the MME through a Ciphered Options Response (such as APN and campus information (such as LHN ID)). If the PDN is requested by the UE, the UE carries the APN and the related campus information (such as the LHN ID) through the PDN CONNECTIVITY REQUEST message.

The third step is: the HeNB attached to the UE determines, according to its own configuration capability, the MME to carry the LHN ID or the L-GW@CN List/FQDNs and the HeNB@LN address.

The fourth step: the MME performs a judgment according to the HSS numbering information, the capability of the HeNB, and the request initiated by the UE, and determines whether the campus can be accessed and how to access the campus.

The fifth step is: when the UE moves from the campus to the outside of the campus, or moves from outside the campus to the campus, the MME performs data channel switching according to the capability of the base station and the connection currently established by the UE.

The preferred embodiment provides a method for accessing the campus service outside the campus, and provides a method for supporting the continuity of the IP data when the UE moves between the intranets. The MME can select an appropriate one according to the specific scenario of the UE accessing. The link accesses the local service through the LGW, and can solve the mobility of the eNB/HeNB (inside and outside the campus) where the LIPA capability is inconsistent, and realizes seamless handover inside and outside the campus.

3 is a schematic diagram of a comparative description of accessing a campus network inside and outside a campus according to a preferred embodiment of the present invention, as shown in FIG.

The UE is in the campus, and the data packet is directly offloaded from the HeNB to the LGW through the local offloading technology. The local data does not need to pass through the SGW, and the authentication is guaranteed by the core network numbering authority and the company authentication server;

The UE is outside the campus. In the embodiment of the present invention, the data packet is sent to the LGW through the SGW. The authentication mode and the authentication mode of the UE in the campus are unified, and are all guaranteed by the core network numbering authority and the company authentication server; and the ordinary VPN scheme: the data passes through the SGW/PGW, bypassing the company's external network VPN gateway. The UE needs to install the VPN client, and the authentication authority is guaranteed by the external network VPN.

FIG. 4 is a schematic diagram of a process for a UE to perform an access request for a campus APN outside a campus according to a preferred embodiment of the present invention, as shown in FIG. 4 .

The specific process of the UE performing the access request process of the campus APN outside the campus is as follows:

Step 1-3: The L-GW in the campus completes the registration process of power-on;

Step 4: The UE performs an access request for the campus APN outside the campus, and the UE passes the non-access stratum (NAS) message PDN Connectivity Request (where the APN and the campus information (eg, LHN ID) are carried. Related information) The PDN connection process that initiated the request. When the message is sent to the MME through the H1 S1 message Uplink NAS Transports, because the UE accesses outside the campus, the HeNB outside the campus does not support LIPA, so the Uplink NAS Transports does not carry the LHN ID or L-GW@CN List/FQDNs. Information related to the campus LIPA bearer such as the HeNB@LN address.

Step 5: The MME obtains valid subscription information from the HSS, and learns whether the APN requested by the UE supports LIPA.

In step 6, the MME determines the attributes of the UE request, the HeNB capability, and the HSS number. If the APN requested by the UE supports LIPA, but the HeNB does not support LIPA (or the APN requested by the UE supports LIPA, the HeNB in the park also supports LIPA, but is inconsistent with the campus to which the UE belongs), and the MME is carried according to the UE. APN information and campus information (eg, LHN ID) query the DNS server for the campus APN requested by the UE. L-GW@LN, L-GW@CN List/FQDNs (Fully Qualified Domain Nam) information;

Step 7, the MME and the L-GW complete the session creation process;

Step 8: The MME sends a Bearer Setup Request message to the HeNB, and does not carry a Correlation-ID. The user plane data channel of the HeNB communicates with the L-GW through the S-GW.

Step 9, other processes;

Step 10: The MME uses the S-GW@LN address/S-GW TEID of the S-GW as a parameter of the "internal channel" of the L-GW through a Change Notification (Change Notification Request/Response message or a Modify Bearer Request/Response message) process. Brought to L-GW.

FIG. 5 is a schematic diagram of an X2 HO process in a campus outbound campus according to a preferred embodiment of the present invention, as shown in FIG. 5.

Outside the campus (does not support LIPA connection) to the X2 HO process in the campus (supporting LIPA connection) (for example, the Sxx port only supports user plane packet transmission). The specific process is as follows:

Step 1-2: Outside the campus (does not support LIPA connection), perform X2 HO to the campus (supporting LIPA connection), source HeNB-G and normal X2 HO flow, and control all radio resources (Radio Resource Control, RRC for short). The information such as the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is sent to the target HeNB-YQ through the HO Request of X2. The target HeNB-YQ completes the admission control, returns an ACK (Acknowledgement) to the source HeNB-G, and sends a SN (Serial Number) STATUS TRANSFER message to the source, and starts data back-transmission of the user plane. At this time, the data channel of the L-GW is still sent by the L-GW to the HeNB-G through the S-GW.

Step 3: The HeNB-YQ in the campus supports the LIPA function, and brings the LHN ID or the L-GW@CN List/FQDNs and the HeNB@LN address to the MME through the S1 message Path Swtich Request. The MME integrates the established APN bearer information, the HeNB capability, and the attributes of the HSS number to determine the UE. If the APN currently established by the UE has established a bearer in the L-GW of the supporting campus, and the target HeNB supports establishing an LIPA connection with the L-GW accessed by the UE, the MME establishes a LIPA channel of the HeNB and the L-GW to the UE;

Step 4-5, the MME first modifies the bearer information of the S-GW, and modifies the related bearer information of the L-GW (modifies the Tunnel Endpoint Identifier (TEID) of the S-GW@LN address/S-GW to TEID of HeNB@LN/HeNB);

Step 6: After the S-GW switches the data channel, after transmitting the user plane data, the end character EndMark is sent to the HeNB.

Step 7: The MME sends a Path Swtich Request ACK message to the HeNB, and carries the Correlation-ID (including the TEID of the L-GW@LN address/L-GW internal tunnel). The user plane data channel of the HeNB is connected to the HeNB through the L-GW. After receiving the Endmark sent by the S-GW, the source HeNB-G forwards the target to the target HeNB-YQ.

In step 8-9, the target HeNB initiates release to the source HeNB, and performs a Tracking Area Update (TAU) process.

6 is a schematic diagram of an X2 HO process outside a campus in a campus, as shown in FIG. 6, in accordance with a preferred embodiment of the present invention.

In the campus (supporting LIPA connection), the X2 HO process outside the campus (which does not support LIPA connection) (for example, the Sxx port only supports user plane packet transmission) is as follows:

Step 1-2: In the campus (supporting LIPA connection), the X2 HO outside the campus (which does not support LIPA connection), the source HeNB-YQ and the normal X2 HO process, and all the RRC/E-RAB information are passed through the X2 HO request. Send to the target HeNB-G. The target HeNB-G completes the admission control, returns an ACK to the source HeNB-YQ, and the source sends a SN STATUS TRANSFER message, and starts data back-transmission of the user plane. At this time, the data channel of the L-GW is still sent to the HeNB-YQ through the LIPA connection.

Step 3: The HeNB-YQ in the campus does not support the LIPA function. The Path Swtich Request message does not carry the LIPA-related information such as the LHN ID or the L-GW@CN List/FQDNs or the HeNB@LN address to the MME. The MME integrates the established APN bearer information, the HeNB capability, and the attributes of the HSS number to determine the UE. If the APN currently established by the UE already has a bearer setup (LIPA connection) on the L-GW supporting the campus, but the target HeNB does not support establishing an LIPA connection with the L-GW accessed by the UE, and the MME establishes and L through the S-GW. -GW channel;

Step 4-5, the MME first modifies the bearer information of the S-GW (Serving Gateway), and modifies the related bearer information of the L-GW (modifies the TEID of the HeNB@LN/HeNB to be the S-GW@LN address/the TEID of the S-GW) );

Step 6. After the L-GW switches the data channel, the EndMark is sent to the source HeNB-YQ.

In step 7, the MME sends a Path Swtich Request ACK message to the HeNB, and does not carry the related information of the LIPA. The user plane data channel of the HeNB is connected to the L-GW through the S-GW.

In step 8-9, the target HeNB initiates release to the source HeNB and performs a TAU procedure.

Appendix of this embodiment:

Example of adding a protocol field:

Protocol configuration options (PCO) information elements:

The campus information elements are shown in Table 1 and Table 2:

Table 1

Table 2

All the related messages sent by the HeNB to the MME need to be added with the LHN Info field (both optional fields). The related messages include:

INITIAL UE MESSAGE (initial UE message);

UPLINK NAS TRANSPORT (Network Attached Storage);

E-RAB SETUP RESPONSE (radio access bearer setup request);

INITIAL CONTEXT SETUP RESPONSE (initial context establishment request);

PATH SWITCH REQUEST (path switch request response);

HANDOVER REQUEST ACKNOWLEDGE (switch request response);

Correlation ID information element extension (referred to in the 23.859 protocol), the Correlation ID defined in R10 is a 32-byte string, which is used for the TEID of the L-GW user plane or the Generic Routing Encapsulation (GRE) Keys. In order to support the structure of the independently deployed L-GW, the Correlation ID also needs to include the necessary information for the internal tunnel establishment of the L-GW and the HeNB: L-GW@LN address/FQDN.

The Correlation ID is the information necessary for the MME to notify the HeNB to establish an internal tunnel. Need to be included in the following messages (all optional fields):

INITIAL CONTEXT SETUP REQUEST (initial context establishment request);

E-RAB SETUP REQUEST (radio access bearer setup request);

PATH SWITCH REQUEST ACKNOWLEDGE (path switch request response);

HANDOVER REQUEST.

Outside the campus (not supporting LIPA connection) in the above embodiment, the S1 HO process in the campus (supporting LIPA connection) and the S1 HO process and Sxx port in the campus (supporting LIPA connection) to the outside of the campus (without LIPA connection) The application embodiment of the X2 HO supporting the signaling transmission of the control plane and the user plane can be consistent with the implementation method and the idea of the above example X2 HO.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Based on the foregoing technical solution provided by the embodiment of the present invention, the mobility management entity MME is used to obtain the access point name APN information and the campus information of the user terminal; the MME obtains valid subscription information from the home location register HSS, and learns that the user terminal applies for access. Whether the APN supports the local IP access LIPA; the MME receives whether the acquisition of the user terminal attachment supports the LIPA bearer information; the MME according to the APN bearer information that the user terminal has established, the HeNB capability, and the The MME performs the judging process on the attribute of the HSS number; the MME establishes a relationship between the link base station and the local gateway L-GW according to the base station capability of the user terminal, and allows the user to access the local service of the campus, or the MME modifies The related bearer information of the server gateway S-GW and the L-GW establishes a link channel of the SGW and the LGW, and completes switching of the data channel. The problem that the continuity of the IP data and the mobility are poor when the user terminal moves between the campuses is solved, the continuity and mobility of the IP data are improved, and seamless switching between the inside and outside of the campus is realized.

Claims

A method for accessing a campus business, including:

The mobility management entity MME acquires the access point name APN information and the campus information of the user terminal;

The MME obtains valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports local IP access LIPA;

Receiving, by the MME, the base station attached to the user equipment to obtain LIPA bearer information;

Determining, by the MME, according to the APN bearer information, the HeNB capability, and the attributes of the HSS number set that have been established by the user terminal;

The MME establishes a relationship between the link base station and the local gateway L-GW according to the base station capability of the user terminal, and allows the user to access the local service of the campus, or the MME modifies the server gateway S-GW and the L-GW. The relevant bearer information is established, and the link channel of the SGW and the LGW is established, and the switching of the data channel is completed.
The method of claim 1, wherein the obtaining, by the mobility management entity MME, the access point name APN information and the campus information of the user terminal comprises:

In the case that the user terminal is covered by the public data network, the locally connected APN information and the campus information are initiated to the MME.
The method according to claim 1, wherein the MME performs a judging process according to the APN bearer information, the HeNB capability, and the HSS numbering attribute that the user terminal has established; the MME selects an appropriate one. The link accesses the local service of the campus through the local gateway L-GW, including:

In the case that the APN requested by the user terminal supports LIPA, the HeNB in the campus does not support LIPA, or the APN requested by the user terminal supports LIPA, and the HeNB in the campus also supports LIPA, and the park that requests access is If the campus to which the user terminal belongs is inconsistent;

The MME queries the domain name system DNS server for the L-GW@LN, L-GW@CN List/full qualified domain name FQDNs information of the campus APN applied by the user terminal according to the APN information and the campus information carried by the user terminal;

The MME creates an L-GW session, and the MME sends a bearer installation message to the HeNB, where the user plane data channel of the HeNB communicates with the L-GW through the S-GW;

The MME sends the S-GW@LN address of the S-GW and the S-GW tunnel endpoint identification TEID as parameters of the internal channel of the L-GW to the L-GW, where the user terminal passes the S-GW outside the campus. In-garage data service access with the L-GW data channel.
The method according to claim 1, wherein the MME performs judgment processing according to the APN bearer information, the HeNB capability, and the HSS numbering attribute that the user terminal has established, and the MME modifies the server gateway. The related bearer information of the S-GW and the L-GW, and the switching of the data channel includes:

In the case that the user terminal does not support the LIPA connection outside the campus to support the HO handover in the LIPA connection campus, if the target HeNB supports the LIPA function in the campus, the MME acquires the local base station network LHN ID or L-GW@ CN List/FQDNs, HeNB@LN address;

The APN currently established by the user terminal has a bearer establishment with the L-GW of the campus, and the target HeNB supports establishing an LIPA connection with the L-GW accessed by the user terminal, and the MME establishes HeNB and L for the user terminal. -GW's LIPA channel;

The MME modifies the bearer information of the S-GW, and modifies the TEID of the tunnel end point identification TEID of the S-GW@LN address/S-GW to be the HeNB@LN/HeNB, and modifies the relevant bearer information of the L-GW;

The MME sends an association identity Correlation-ID to the target HeNB, where the Correlation-ID includes the TEID of the L-GW@LN address/L-GW internal tunnel, and the user plane data channel of the target HeNB passes through the L-GW. The target HeNB is connected.
The method according to claim 1, wherein the MME performs judgment processing according to the APN bearer information, the HeNB capability, and the HSS numbering attribute that the user terminal has established, and the MME modifies the server gateway. The related bearer information of the S-GW and the L-GW, and the switching of the data channels in the park and the park include:

In the case that the user terminal supports the handover from the LIPA connection campus to the outside of the LIPA campus, the APN established by the user terminal UE supports the establishment of the LIPA connection of the L-GW of the campus, but the target HeNB outside the campus does not support and In the case that the L-GW accessed by the mobile terminal establishes a LIPA connection;

Modifying, by the MME, the bearer information of the S-GW, modifying the TEID of the HeNB@LN/HeNB to be the TEID of the S-GW@LN address/S-GW, and modifying the related bearer information of the L-GW;

The MME establishes a channel with the L-GW through the S-GW, and the user plane data channel of the HeNB is connected to the L-GW through the S-GW.
The method of claim 4 or 5, wherein the HO handover comprises:

HO switching of the X2 interface;

The S1 interface HO handover procedure and the Sxx interface support the signaling plane transmission of the control plane and support the HO handover of the message plane of the user plane.
The method according to any one of claims 1 to 6, wherein the campus information comprises at least one of the following:

LHN ID, LGW@CN List, IP address of the internal channel of the HeNB HeNB@LN IP Addr, TEID of the internal channel of the HeNB.
A device for accessing a campus service, comprising:

Obtaining a module, configured to acquire, by the mobility management entity MME, an access point name APN information and a campus information of the user terminal;

a support module, configured to: the MME obtains valid subscription information from the home location register HSS, and learns whether the APN requested by the user terminal supports local IP access LIPA;

a base station module, configured to receive, by the MME, a base station attached to the user equipment to obtain LIPA bearer information;

a determining module, configured to perform, by the MME, a determining process according to the APN bearer information, the HeNB capability, and an attribute of the HSS number that have been established by the user terminal;

The access module is configured to establish a relationship between the link base station and the local gateway L-GW according to the base station capability of the user terminal, so that the user accesses the local service of the campus, or the MME modifies the server gateway S- The bearer channel of the GW and the L-GW establishes a link channel between the SGW and the LGW, and completes switching of the data channel.
The apparatus according to claim 8, wherein the obtaining module is further configured to initiate locally connected APN information and campus information to the MME in case the public data network coverage of the user terminal.
The apparatus of claim 8 comprising:

In the case that the APN requested by the user terminal supports LIPA, the HeNB in the campus does not support LIPA, or the APN requested by the user terminal supports LIPA, and the HeNB in the campus also supports LIPA, and the park that requests access is If the campus to which the user terminal belongs is inconsistent;

The determining module is configured to query, according to the APN information and the campus information carried by the user terminal, the domain name system DNS server to query the L-GW@LN of the campus APN requested by the user terminal, L-GW@CN List/complete Fully qualified domain name FQDNs information;

The access module is configured to create an L-GW session with the L-GW, and the MME sends a bearer installation message to the HeNB, where the user plane data channel of the HeNB communicates with the L-GW through the S-GW;

The access module is configured to bring, by the MME, the S-GW@LN address of the S-GW and the S-GW tunnel endpoint identification TEID as parameters of the internal channel of the L-GW to the L-GW, where the user terminal is used by In-park data services are accessed through the S-GW and L-GW data channels inside and outside the park.
The apparatus of claim 8 comprising:

If the user terminal does not support the LIPA connection outside the campus and supports the HO handover in the LIPA connection campus, if the target HeNB supports the LIPA function in the campus, the determining module is configured to acquire the local base station network LHN. ID or L-GW@CN List/FQDNs, HeNB@LN address;

The access module is configured to establish a bearer between the APN currently established by the user terminal and the L-GW of the campus, and the target HeNB supports establishing an LIPA connection with the L-GW accessed by the user terminal, where the MME sends The user terminal establishes a LIPA channel of the HeNB and the L-GW;

The access module is configured to modify the bearer information of the S-GW, modify the tunnel endpoint identification TEID of the S-GW@LN address/S-GW to be the TEID of the HeNB@LN/HeNB, and modify the related bearer of the L-GW. information;

The access module is configured to send the association identity Correlation-ID to the target HeNB, where the Correlation-ID includes the TEID of the internal tunnel of the L-GW@LN address/L-GW, and the user plane data of the target HeNB is used. The channel is connected to the target HeNB through the L-GW.
The apparatus of claim 8 comprising:

In the case that the user terminal supports the handover from the LIPA connection campus to the outside of the LIPA campus, the APN established by the user terminal UE supports the establishment of the LIPA connection of the L-GW of the campus, but the target HeNB outside the campus does not support and In the case that the L-GW accessed by the mobile terminal establishes a LIPA connection;

The access module is configured to modify the bearer information of the S-GW, modify the TEID of the HeNB@LN/HeNB to be the SID of the S-GW@LN address/S-GW, and modify the related bearer information of the L-GW;

The access module is configured to establish, by the S-GW, a channel with the L-GW, and the user plane data channel of the HeNB is connected to the L-GW through the S-GW.
The apparatus of claim 11 or 12, wherein the HO handover comprises:

HO switching of the X2 interface;

The S1 interface HO handover procedure and the Sxx interface support the signaling plane transmission of the control plane and support the HO handover of the message plane of the user plane.
The apparatus according to any one of claims 8 to 13, wherein the campus information comprises at least one of the following:

LHN ID, LGW@CN List, IP address of the internal channel of the HeNB HeNB@LN IP Addr, TEID of the internal channel of the HeNB.
A system for accessing campus services, including:

The device of any one of claims 8 to 14.