WO2011079667A1 - Procédé et système d'établissement d'un accès local sous protocole internet (ip) ou d'un délestage de trafic ip sélectionné - Google Patents

Procédé et système d'établissement d'un accès local sous protocole internet (ip) ou d'un délestage de trafic ip sélectionné Download PDF

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Publication number
WO2011079667A1
WO2011079667A1 PCT/CN2010/079098 CN2010079098W WO2011079667A1 WO 2011079667 A1 WO2011079667 A1 WO 2011079667A1 CN 2010079098 W CN2010079098 W CN 2010079098W WO 2011079667 A1 WO2011079667 A1 WO 2011079667A1
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Prior art keywords
user terminal
base station
local gateway
target base
gateway
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PCT/CN2010/079098
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English (en)
Chinese (zh)
Inventor
朱春晖
宗在峰
冯钢
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中兴通讯股份有限公司
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Publication of WO2011079667A1 publication Critical patent/WO2011079667A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0019—Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]

Definitions

  • the present invention relates to the field of communications, and in particular, to a Local Internet Protocol Access (LIPA) or a selected Internet Protocol traffic offload. (Selected IP Traffic Offload, referred to as SIPTO) Establish method and system.
  • LIPA Local Internet Protocol Access
  • SIPTO Select IP Traffic Offload
  • a mobile communication network includes a base station subsystem, a mobility management entity, a core network gateway, and a home subscriber network. The connection relationship of the mobile communication network in the related art is as shown in FIG. 1.
  • the mobility management entity is responsible for the control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management;
  • the core network gateway includes a Serving Gateway (S-GW) and Packet Data Network Gateway (P-GW), which is connected to the Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Incoming gateway device forwarding data between E-UTRAN and P-GW, and responsible for buffering paging waiting data
  • P-GW is Evolved Packet System (EPS) and packet data network ( Packet Data Network (referred to as PDN) border gateway, responsible for PDN access and forwarding data between EPS and PDN.
  • EPS Evolved Packet System
  • PDN Packet Data Network
  • the mobile communication system can also support local IP access functions.
  • the terminal can implement other IP devices in the home network. Or local access to the Internet.
  • a local gateway (Local Gateway, L-GW for short) may be added to provide support for the local IP access technology.
  • the L-GW may be a local S-GW (Local S-GW, referred to as L-.
  • the SGW) and the local P-GW (Local P-GW, referred to as L-PGW) may also be separate L-PGWs, and the local gateway may be combined with the base station.
  • the L-GW can be a Local Gateway GPRS Support Node (L-GGSN) and a local GPRS support.
  • the Local Serving GPRS Support Node (L-SGSN for short) may also be a separate L-GGSN.
  • the base station subsystem may be an evolved base station of E-UTRAN (Evolved Node B, referred to as eNodeB) and Global Terrestrial Radio Access (UTRAN) / Enhanced Global System for Mobile Communications (GSM) GSM Radio Access Network (RGRAN) Radio Network Controller (RNC) / Base station controller (BSC), or home base station (HNB/HeNB) and home base station gateway (HNB GW/HeNB GW).
  • the local gateway can be configured not only with the home base station but also with the home base station gateway.
  • the home base station gateway can also be combined with the home base station.
  • the base station when a user connects to the network, the base station establishes a connection to the local gateway L-GW1 (close to the user's gateway), and assigns an IP address to the user, when the user moves.
  • the related art When accessing the target base station from the source base station, the related art also needs to connect the target base station to the L-GW1 (the gateway close to the user).
  • a primary object of the present invention is to provide a method and system for establishing a LIPA or SIPTO to solve the problem that a route is not optimized after a user moves to a different base station and still connects to a previous local gateway.
  • a LIPA or SIPTO establishing method including: a user terminal switching from a source base station to a target base station; releasing LIPA or SIPTO between the user terminal via the target base station to the first local gateway, and establishing a user The terminal passes the target base station to the LIPA or SIPTO of the second local gateway.
  • the method further includes: determining the target base station to the first The route between the local gateways does not meet the predetermined condition, and there is a second local gateway that meets the predetermined condition with the route between the target base station, where the predetermined condition includes: the current location of the user terminal under the target base station is in a predetermined area of the local gateway Within the scope.
  • determining that the route between the target base station and the first local gateway does not meet a predetermined condition, and that the second local gateway that meets the predetermined condition with the route between the target base station includes: a mobility tube Obtaining a current location of the user terminal; the mobility management entity determines that the current location of the user terminal is outside a predetermined geographical range of the first local gateway, and determines a second local gateway that meets the predetermined condition in the local gateway connected to the target base station; Alternatively, the target base station determines a second local gateway that meets the predetermined condition, and sends the IP address of the second local gateway to the mobility management entity, and the mobility management entity determines the IP address of the second local gateway and the IP address of the first local gateway.
  • the acquiring, by the mobility management entity, the current location of the user terminal includes: moving the user terminal in the idle state to the area covered by the target base station, and determining that the current location tracking area carried in the air interface broadcast message from the target base station is not from the mobile
  • the user terminal initiates a tracking area update request
  • the target base station carries the current location information of the user terminal in the tracking area update request, and sends the current location information to the mobility management entity; or, the user terminal in the connected state Moving to the area covered by the target base station, performing interface X2 handover between the base stations, the target base station transmitting the current location of the user terminal to the mobility management entity; or, the user terminal in the connected state moves to the area covered by the target base station And performing an interface S 1 handover between the base station and the serving gateway, and the source base station sends the current location of the user terminal to the mobility management entity.
  • the method further includes: sending, by the target base station, the information of the second local gateway to the mobility management entity, where the second local gateway is pre-configured by the target base station.
  • releasing LIPA or SIPTO between the user terminal and the first local gateway via the target base station, and establishing LIPA or SIPTO of the user terminal to the second local gateway via the target base station comprises: the mobility management entity initiates establishment to the second local gateway a session request, where the establishment session request carries an access point name of a PDN connection between the user terminal and the first local gateway; the second local gateway sends a setup session reply to the mobility management entity, where the establishment session reply carries the first The second local gateway allocates an IP address to the user terminal; the mobility management entity initiates a delete session request to the first local gateway.
  • determining that the route between the target base station and the first local gateway does not meet the predetermined condition comprises: the first local gateway receiving the current location of the user terminal from the mobility management entity, the first local gateway checking that the current location of the user terminal exceeds the first a predetermined address range of the local gateway; releasing the LIPA or SIPTO between the user terminal and the first local gateway via the target base station includes: after the first local gateway sends the delete bearer request to the mobility management entity, the mobility management entity sends the first local gateway to the first local gateway Sending a delete bearer reply, where the reason for deleting the bearer request is that the first local gateway cancels providing the UE with a monthly service, and instructs the UE to reconnect; and establishing the user terminal to the second local gateway via the target base station
  • the LIPA or the SIPTO includes: the mobility management entity sends a setup session request to the second local gateway, and the second local gateway sends a setup session reply to the mobility management entity, where the setup session request carries the user terminal and the first local gateway.
  • the method further includes: sending the IP address assigned by the second local gateway to the user terminal to the user terminal.
  • the IP address assigned by the second local gateway to the user terminal is delivered to the user terminal, including at least one of the following: the mobility management entity sends the user terminal a tracking area update carrying the IPv4 address allocated for the user terminal (Tracking) Area Update, abbreviated as TAU) Admission message and/or non-access stratum message, the user terminal accepts the IPv4 address; the first predetermined gateway sends a route broadcast carrying the IPv6 address prefix assigned to the user terminal to the user terminal, and the user terminal accepts the IPv6 address.
  • Tracking Tracking Area Update
  • Admission message and/or non-access stratum message the user terminal accepts the IPv4 address
  • the first predetermined gateway sends a route broadcast carrying the IPv6 address prefix assigned to the user terminal to the user terminal, and the user terminal accepts the IPv6 address.
  • a LIPA or SIPTO setup system including: a release module, configured to release a user terminal to a first local gateway via a target base station if a user terminal switches from a source base station to a target base station Between the LIPA or SIPTO; establishing module for establishing LIPA or SIPTO of the user terminal to the second local gateway via the target base station.
  • FIG. 1 is a schematic diagram of a mobile communication network architecture according to the related art
  • 2 is a flow chart of a LIPA or SIPTO establishment method according to an embodiment of the present invention
  • FIG. 3 is a detailed flowchart of a LIPA or SIPTO establishment method according to Example 1 of the present invention
  • FIG. 4 is a LIPA or SIPTO establishment according to Example 2 of the present invention.
  • FIG. 5 is a structural block diagram of a LIPA or SIPTO setup system in accordance with an embodiment of the present invention.
  • FIG. 2 is a flowchart of a LIPA or SIPTO establishing method according to an embodiment of the present invention.
  • the method includes: Step 4: S202, the user terminal The source base station switches to the target base station; step S204, releasing LIPA or SIPTO between the user terminal and the first local gateway via the target base station, and establishing LIPA or SIPTO of the user terminal to the second local gateway via the target base station.
  • the target base station connected to the first local gateway in the handover process is changed to be connected to the second local gateway, and the second local gateway is different from the user terminal.
  • the local gateway ie, the first local gateway
  • the local gateway connected before the handover has a very obvious difference from the method in the prior art that the target base station is still connected to the gateway connected to the user terminal before the handover, and the method solves the problem in the user.
  • accessing the different local base stations and still connecting to the previous local gateway may cause the routing to be unoptimized.
  • the second local gateway connected to the target base station can have a more optimized route than the original first local gateway, thereby better serving the user terminal.
  • the foregoing process is to determine that the route between the first local gateway and the target base station is not optimized (ie, the connection quality is relatively poor), and that the route between the target base station and the target base station is optimized (than the above).
  • the routing between the first local gateway and the target base station is more optimized; in the embodiment, it is determined by determining whether the predetermined condition is met, but in practical applications, other methods may also be used, such as , compare the number of hops of the route, etc. to determine.
  • determining that the route between the target base station and the first local gateway does not meet the predetermined condition, and that the second local gateway that meets the predetermined condition with the route between the target base station includes: the mobility management entity acquires the current location of the user terminal; The mobility management entity determines that the current location of the user terminal is outside a predetermined geographical range of the first local gateway, and determines a second local gateway that meets a predetermined condition among the local gateways connected to the target base station; or, the target base station determines that the predetermined condition is met a second local gateway, and sending an IP address of the second local gateway to the mobility management entity, where the mobility management entity determines that the IP address of the second local gateway is different from the IP address of the first local gateway, determining that the first local gateway is not Meet the predetermined conditions. The mobility management entity determines the target base station to the first local gateway
  • the acquiring, by the mobility management entity, the current location of the user terminal includes: moving the user terminal in the idle state to the area covered by the target base station, and determining that the current location tracking area carried in the air interface broadcast message from the target base station is not from the mobile
  • the user terminal initiates a tracking area update request
  • the target base station carries the current location information of the user terminal in the tracking area update request, and sends the current location information to the mobility management entity; or, the user terminal in the connected state Moving to the area covered by the target base station, performing interface X2 handover between the base stations, the target base station transmitting the current location of the user terminal to the mobility management entity; or, the user terminal in the connected state moves to the area covered by the target base station And performing an interface S 1 handover between the base station and the serving gateway, and the source base station sends the current location of the user terminal to the mobility management entity.
  • the mobility management entity may also obtain the current location of the user terminal in other manners than the foregoing three manners, which is not limited by the embodiment of the present invention.
  • the information of the second local gateway of the target base station is sent to the mobility management entity, where the second local gateway is pre-configured by the target base station.
  • the target base station notifying the mobility management entity of the pre-configured information of the second local gateway with the optimized route in the host, the process of searching for the second local gateway may be omitted, and the resources of the system are saved.
  • releasing the LIPA between the user terminal via the target base station to the first local gateway or SIPTO, and establishing the LIPA or SIPTO of the user terminal to the second local gateway via the target base station comprises: the mobility management entity initiating a setup session request to the second local gateway, wherein the establishing the session request carries the user terminal and the first local gateway The access point name of the PDN connection; the second local gateway sends a setup session reply to the mobility management entity, where the establishment session reply carries the IP address assigned by the second local gateway to the user terminal; the mobility management entity is to the first local The gateway initiates a delete session request.
  • the release connection process and the connection establishment process are initiated.
  • the first local gateway may determine that the first local gateway does not meet the predetermined condition, and notify the mobility management entity to initiate connection release, and then determine, by the mobility management entity, the second local gateway, where Performing a new connection establishment, the specific process is as follows: Determining that the route between the target base station and the first local gateway does not meet the predetermined condition includes: the first local gateway receives the current location of the user terminal from the mobility management entity, and the first local gateway checks The current location of the user terminal exceeds the predetermined address range of the first local gateway; releasing the LIPA or SIPTO between the user terminal and the first local gateway via the target base station includes: after the first local gateway sends the delete bearer request to the mobility management entity, The sex management entity sends a delete 7-load reply to the first local gateway
  • the gateway's LIPA or SIPTO includes: Mobility Management Entity
  • the second local gateway sends a setup session request, and the second local gateway sends a setup session reply to the mobility management entity, where the establishment session request carries the access point name of the PDN connection between the user terminal and the first local gateway, and establishes a session.
  • the reply carries the IP address assigned by the second local gateway to the user terminal.
  • releasing the LIPA or SIPTO between the user terminal and the first local gateway via the target base station and establishing the IP address allocated by the second local gateway to the user terminal after the LITP or SIPTO of the user terminal to the second local gateway via the target base station
  • the address is sent to the user terminal.
  • the process of sending the IP address assigned by the second local gateway to the user terminal to the user terminal may include at least one of the following:
  • the mobility management entity sends a TAU admission message and/or a non-access stratum message carrying the IPv4 address assigned to the user terminal to the user terminal, and the user terminal accepts the IPv4 address;
  • the first predetermined gateway sends a route broadcast carrying the IPv6 address prefix allocated to the user terminal to the user terminal, and the user terminal accepts the IPv6 address prefix;
  • the first predetermined gateway sends an IPv4 address to the user terminal through the DHCPv4 address allocation process, and the user terminal accepts the IPv4 address.
  • the foregoing source base station may include: a home base station or a radio network controller (Radio
  • the network controller (referred to as RNC for short), the target base station may include: a home base station or an RNC; the first local gateway may include: a local access gateway, a local monthly service gateway, a core network access gateway, or a core network service gateway, The second local gateway may include: a local access gateway, a local monthly service gateway, a core network access gateway, or a core network service gateway; the mobility management entity is: a Mobility Management Entity (abbreviated as ⁇ ), mobile The Switching Centre (Mobile Switching Centre, MSC for short), or the Serving GPRS Support Node (SGSN), where the local access gateway can be L-PGW, L-GGSN, local The serving gateway may be an L-SGW or an L-SGSN.
  • ⁇ Mobility Management Entity
  • MSC Mobile Switching Centre
  • SGSN Serving GPRS Support Node
  • the core network access gateway may be a P-GW or a GGSN, and the core network serving gateway may be an S-GW or an SGSN.
  • the base station accessed by the local IP may be the same as the address of the local access gateway.
  • the method provided by the embodiment of the present invention is further described in detail below by way of specific examples with reference to the accompanying drawings.
  • the L-GW in the following example may be a gateway in the operator network close to the user's location, an integrated gateway on the home base station, or a gateway in a non-operator network (such as an enterprise-owned network).
  • Example 1 This example uses a mobility management entity as an MME as an example for detailed description.
  • Step 301 The UE connects to the network (the gateway is L-GW1 or PGW1) through the base station subsystem (ie, the base station, denoted as (H) eNB1) and performs local IP access;
  • Step 302a The UE moves to (H) the coverage of the eNB2, and when the UE is in the idle state, the UE monitors the current location in the air interface broadcast message sent by the base station.
  • the Tracking Area (TA) is not in the TA List sent by the MME in Step 4, and the UE sends the TA List.
  • the Tracking Area Update Request (TAU Request) where the TAU message is forwarded, the (H) eNB2 adds the current location information of the user, such as CGI (Cell No.)/TAI, to the TAU message.
  • the MME may be sent to the MME.
  • the IP address of the gateway L-GW2/P-GW2 with the optimized route configured by the eNB may be sent to the MME.
  • Step 302b The UE moves to (H) eNB2 coverage. When the UE is in the connected state, a handover occurs. If an X2 handover occurs between the interfaces between the base stations, the target base station subsystem ((H) eNB2) The MME is notified of the location where the user is currently located; optionally, the (H) eNB2 may send the IP address of the gateway L-GW2/P-GW2 with the optimized route configured by itself to the MME.
  • Step 302c The UE moves to (H) eNB2 coverage. When the UE is in the connected state, a handover occurs.
  • the source base station subsystem (H) eNB1) informs the MME of the location where the user is currently located; optionally, (H) eNB2 may send the IP address of the gateway L-GW2/P-GW2 with the optimized route configured by itself to the MME.
  • the MME may also obtain the location information of the user in the service request process initiated by the UE, and the description is not repeated herein.
  • step 202 after the UE moves to (H) eNB2 to cover, it will switch from (H) eNB1 to (H) eNB2.
  • Step 303 The MME searches for the route-optimized L-GW2/P-GW2 to which the base station (or the location) is connected according to the base station location information currently connected by the UE obtained in step 302, and determines that the UE is currently connected (specifically The gateway L-GW1/P-GW1 that the UE currently connects through (H) eNB2 is not a route optimized gateway; or according to (H) the IP address of the gateway L-GW2/P-GW2 sent by the eNB2 and the gateway currently connected by the UE The IP address of the L-GW1/P-GW1 is different, and it is determined that the gateway currently connected by the UE is not a route optimized gateway; according to the above judgment, the MME initiates a setup session request to the gateway L-GW2/P-GW2, where the carrying UE is previously connected to the gateway. Access point name of the
  • Step 304 The gateway L-GW2/P-GW2 sends a setup session reply to the MME, where the new IP address assigned to the UE, that is, the IPv4 address and/or the IPv6 address prefix is carried.
  • Step 305 The MME initiates a delete session request, and The UE that has been connected is deleted via the connection session of (H) eNB2 to the gateway L-GW1/P-GW1;
  • Step 306a The step may be that the MME completes the TAU procedure of the UE, and sends a TAU admission message to the UE, where the UE includes a new IPv4 address allocated for the UE, and the UE accepts the address.
  • Step 4 may be another NAS (non-access stratum) message sent by the MME to the UE, where the message includes a new IPv4 address allocated for the UE, and the UE accepts the address;
  • Step 306c The gateway L-GW1/P-GW1 can process the new IPv4 address through the DHCPv4 address allocation process. Send to the UE, the UE accepts the address.
  • Step 401 The UE is covered by (H) eNB1 to the MME. Initiating an attach request or a PDN connection setup request; Step 402, the MME performs gateway selection, and sends a setup session request to the selected gateway L-GW1/P-GW1 to request the gateway to establish a PDN connection for the UE; Step 403, the gateway to the MME Sending a session reply, where the MS Info Change Reporting Action (Start) is used to indicate that the MME needs the latest location of the UE when the location of the UE changes; 404.
  • Step 401 The UE is covered by (H) eNB1 to the MME. Initiating an attach request or a PDN connection setup request; Step 402, the MME performs gateway selection, and sends a setup session request to the selected gateway L-GW1/P-GW1 to request the gateway to establish a PDN connection for the UE; Step 403, the gateway to the MME Sending a session reply, where the MS Info Change Reporting Action (Start)
  • Step 405 is the same as step 302.
  • Step 406 The MME changes the reporting action (starting;) according to the mobile station information received in step 403, and reports the latest location CGI/TAI of the UE to the gateway L-GW1/P-GW1, which may be in other processes.
  • the signaling sent by the MME to the gateway is required, or a special report signaling message for reporting the latest location of the UE;
  • Step 407 according to the latest location of the UE (CGI/TAI) received in step 406, the gateway checks itself.
  • the saved area of the serviced area with the optimized route is found to be in the area, and it is determined that the UE is no longer served.
  • the MME sends a delete bearer request, where the carrying cause value is no longer serving the UE and indicating The UE reconnects; Step 408, the MME sends a delete bearer reply to the gateway L-GW1/P-GW1; Step 4 gathers 409, and the MME re-selects the PDN GW for the PDN connection of the UE, and finds the gateway L-GW2/P-GW2
  • the UE may be configured to provide a connection request to the PDN, and send a setup session request to the gateway L-GW2/P-GW2, where the APN corresponding to the PDN is carried; Step 410, the gateway L-GW2/P-GW2 replies to the MME.
  • a new IP address the address may be an IPv4 address and/or an IPv6 address prefix; step 4 is 411, and the new IP address assigned by the L-GW2/P-GW2 to the UE is passed to the UE, specific At least one of steps 306a, 306b, and 306c may be retrieved for notification.
  • the above embodiment is described by taking the case where the current E-UTRAN system does not have a home base station gateway. However, the above method is also applicable to the case where there is a home base station gateway. In this case, the home base station and the home base station gateway can be unified as a base station or a base station.
  • the method is also applicable to the eNB of the UTRAN/GERAN, and the base station subsystem is the macro eNB.
  • the mobility management entity is the SGSN, and details are not described herein.
  • the network releases the LIPA or SIPTO between the previously connected gateway and the user in the case that the user is monitored to move to the target base station, and the route between the target base station and the previously connected gateway is not optimized. And establishing a LIPA or SIPTO between the user and the route optimized gateway, and then the newly connected gateway allocates a new IP address to the user, and the network side notifies the user of the IP address, and the user accepts the IP address and uses the IP address to perform the IP address. Local IP access.
  • FIG. 5 is a structural block diagram of a LIPA or SIPTO establishing system according to an embodiment of the present invention.
  • the system includes: a releasing module 52, configured to When the user terminal switches from the source base station to the target base station, the user is released.
  • the establishing module 54 is configured to establish LIPA or SIPTO of the user terminal to the second local gateway via the target base station.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed 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 order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the 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 scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

La présente invention concerne un procédé et un système d'établissement d'un accès IP local (LIPA) ou d'un délestage de trafic IP sélectionné (SIPTO). Le procédé comprend les étapes suivantes : un terminal d'utilisateur est transféré entre une station de base de source et une station de base de destination; une fonction LIPA ou SIPTO entre le terminal d'utilisateur et une première passerelle locale est libérée et une fonction LIPA ou SIPTO est établie avec une seconde passerelle locale, par l'intermédiaire de la station de base de destination. Au moyen de la présente invention, il est possible de réduire la consommation de ressources du réseau et les délais de transmission des données de l'utilisateur et d'améliorer la facilité d'emploi par l'utilisateur.
PCT/CN2010/079098 2009-12-28 2010-11-24 Procédé et système d'établissement d'un accès local sous protocole internet (ip) ou d'un délestage de trafic ip sélectionné WO2011079667A1 (fr)

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CN200910266004.3A CN102111748B (zh) 2009-12-28 2009-12-28 本地ip连接建立方法及系统

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