CN102056136B

CN102056136B - Tunnel updating method and system in communication system supporting local IP access

Info

Publication number: CN102056136B
Application number: CN200910209139.6A
Authority: CN
Inventors: 王静; 周娜; 霍玉臻; 梁爽
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-10-28
Filing date: 2009-10-28
Publication date: 2014-04-09
Anticipated expiration: 2029-10-28
Also published as: WO2011050663A1; CN102056136A

Abstract

The invention discloses a tunnel updating method in a communication system supporting local IP access, which comprises the steps that: when a mobility management component of a user terminal under idle state receives a downlink data notification of a data cache unit and local IP access is activated by the user terminal, the mobility management component initiates the updating for local IP access transmission tunnels between a wireless side network element and the data cache unit as well as between the wireless side network element and a local access gateway; or according to a downlink data source, the updating for the tunnels for downlink cache data transmission of local IP access between the wireless side network element and the local access gateway as well as between the wireless side network element and the data cache unit is selectively initiated. Simultaneously, the invention discloses a system realizing the method. The technical scheme of the invention is simple and practical.

Description

Tunnel updating method and system in the communication system of support local IP access

Technical field

The present invention relates to the tunnel renewal technology under local IP access (LIPA, Local IP Access) function activation state, relate in particular to tunnel updating method and system in a kind of communication system of supporting local IP access.

Background technology

In order to keep 3-G (Generation Three mobile communication system) in the competitiveness of the communications field, for user terminal provides, speed is faster, lower, the more personalized Mobile Communication Service of time delay, simultaneously, reduce the operation cost of operator, third generation partner program (3GPP, 3rd Generation Partnership Project) standard operation group is just being devoted to the research of evolved packet system (EPS, Evolved Packet System).Fig. 1 is the structural representation of evolution grouping domain system, and as shown in Figure 1, whole EPS system is divided into wireless access network and core net two parts.In core net, comprised home subscriber terminal server (HSS, Home Subscriber Server), Mobility Management Entity (MME, Mobility Management Entity), Serving GPRS Support Node (SGSN, Serving GPRS Support Node), policy charging rule function (PCRF, Policy andCharging Rule Function), gateway (S-GW, Serving Gateway), packet data gateway (P-GW, PDN Gateway) and packet data network (PDN, Packet Data Network).Below detailed functions: home subscriber terminal server is the permanent storage place of user terminal subscription data, is positioned at the signing home network of user terminal.Mobility Management Entity, be user terminal subscription data at the storage place of current network, be responsible for user terminal to the Non-Access Stratum signaling management of network, the mobile management of the safety verification function of user terminal, user terminal, tracking and paging management function and bearer management under user terminal idel mode.Serving GPRS Support Node, is the business support point of GERAN and UTRAN inserting user terminal to kernel network network, similar with Mobility Management Entity in function, is responsible for the functions such as position renewal, paging management and bearer management of user terminal.Gateway, be the gateway that core net arrives wireless system, be responsible for user terminal to the user terminal face carrying of core net, the data buffer storage under user terminal idel mode, function, Lawful Interception and packet routing and the forwarding capability of network side initiating business request; Gateway is responsible for the situation that counting user terminal is used wireless network, and produces the ticket that user terminal is used wireless network, sends charging gateway to.Packet data gateway, it is the gateway of evolution system and this system external packet data network, it is connected on internet and packet data network, the functions such as Internet protocol (IP, the InternetProtocol) address assignment of responsible user terminal, billing function, grouping packet filtering, policy control.Packet data network, is the IP operation network of operator, and this network is served for user terminal provides IP by the core net of operator.Policy charging rule functional entity is the server of being responsible for providing charging control, online credit control, thresholding control, service quality (QoS, Quality ofService) tactful aspect rule in evolution system.Wireless access network, by evolution base station (eNB, E-UTRAN NodeB) and 3G radio network controller (RNC, Radio Network Control) form, it is mainly responsible for the transmitting-receiving of wireless signal, by air interface and user terminal, contact Radio Resource, scheduling of resource, the access control of management air interface.

Above-mentioned Serving GPRS Support Node is the SGSN upgrading, can support and gateway between S4 interface, and and mobility management unit between adopt GTPv2 agreement to carry out intercommunication.And for supporting the SGSN of 3G core net the PS territory network architecture and Fig. 1 different.Now SGSN adopts gn interface to be connected with MME, and intercommunication adopts GTPv1 agreement.SGSN can not be connected with gateway, is connected to Gateway GPRS Support Node (GGSN, Gateway GPRS Support Node) directly carries out packet data network access by gn interface.

Home eNodeB (HNB, Home NodeB) or the Home eNodeB of evolution be small-sized, the lower powered base station of a class, dedicated resources as certain user's terminal, being deployed in the private sites such as family, group, company or school uses, be mainly for higher service rate being provided to user terminal and reducing and use the needed expense of high rate services, make up the deficiency that existing distributed cellular radio communication system covers simultaneously.The advantage of Home eNodeB is economical, convenient, low-power output, plug and play, broadband access, use single mode user terminal etc.

Fig. 2 is the first structural representation of wireless side network element core network access, and as shown in Figure 2, Home eNodeB can be directly connected to core network.Fig. 3 is the second structural representation of wireless side network element core network access, as shown in Figure 3, Home eNodeB also can be linked into core network by this logical ne of femto gateway, femto gateway major function is: the fail safe of checking Home eNodeB, process the registration of Home eNodeB, Home eNodeB is carried out to operation maintenance management, according to Carrier Requirements configuration and control Home eNodeB, be responsible for the data of exchcange core net and Home eNodeB.Fig. 4 is the third structural representation of wireless side network element core network access, and as shown in Figure 4, Home eNodeB can be connected to core network by wireless side network element.As shown in Figure 2, Figure 3, Figure 4, in order to realize local IP access function (or being called SIPTO (Selected IP TrafficOffload)), be this locality access of user terminal to the IP device in other IP devices of home network, enterprise network or internet, set up local gateway, setting up that local access network closes can provide providing powerful support for local IP access technology, local gateway can and wireless side network element close and establish or near wireless side network element (external), also can and femto gateway close and establish or near femto gateway (external).Local gateway can be local SGW (L-SGW, Local SGW), local PGW (L-PGW, Local PGW), local GGSN (L-GGSN, Local GGSN), external local L-GW etc.

Fig. 5 is the data flow path schematic diagram of local IP access and the access of traditional IP core network, as shown in Figure 5, for the user terminal of supporting local IP access, can set up traditional IP core network visit data path and local IP access data path, and for the connection of local IP access, local IP access data path closes (L-SGW, L-PGW from user terminal to wireless side network element to local access network, L-GGSN), transfer of data is without core net.In order to realize this locality access of user terminal to other IP devices of home network or internet, can set up two connections, article one local IP access data path is directly accessed the Internet (the Internet LIPA connection).Second local IP access data path is directly accessed other IP devices of home network (home network LIPA connection).For user terminal is set up after local IP access connection, the transmission path of local IP access data under connection status.When user terminal does not have for a long time local IP access data receiver or sends, wireless side network element can discharge to eat dishes without rice or wine to connect and make user terminal enter idle condition.If now there are again the local IP access data of user terminal to arrive, local access network closes the gateway can send data to core net and carries out buffer memory, by user terminal paging during to connection status again by the data distributing of buffer memory, can guarantee that in this way local IP access data do not lose, for user terminal provides good service-aware, and can the existing network element resources of multiplexing core net, do not need to increase the data buffer storage function that local access network closes, equipment is realized simple.

Adopt the method for core net cached in serving gateway local IP access data can cause user terminal in connection status situation, to have two data channel to send data to wireless side simultaneously.But core network mobility administrative unit is being transferred to user terminal the tunnel renewal that only proceeds to data buffer storage network element when connection status is set up user terminal face at present.Can cause so the direct tunnel of local IP access not set up, normal local IP access function cannot realize.

Summary of the invention

In view of this, main purpose of the present invention is to provide tunnel updating method and system in a kind of communication system of supporting local IP access, can when receiving the downlink data of user terminal of idle condition, set up the direct tunnel of local IP access.

For achieving the above object, technical scheme of the present invention is achieved in that

Support a tunnel updating method in the communication system of local IP access, comprising:

Core network mobility management component receives when the downlink data notification of data buffer storage unit and described user terminal have activated local IP access, and described mobile management parts are initiated the renewal to tunnel between wireless side network element and described data buffer storage unit and between described wireless side network element and local access network pass; Or described mobile management parts are according to down buffer storage Data Source, initiate between described wireless side network element and described local access network pass and the optionally renewal to tunnel between described wireless side network element and described data buffer storage unit.

Preferably, described mobile management parts comprise Mobility Management Entity MME in long evolving system or the Serving GPRS Support Node SGSN in general packet radio service gprs system.

Preferably, when described mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.Described mobile management parts are initiated tunnel and are upgraded, and comprising:

Described MME initiates the paging to described user terminal, and by described wireless side network element set up and described user terminal between radio bearer, described wireless side network element by with described user terminal between the sign of downlink tunnel corresponding to the radio bearer set up notify described MME;

Described MME notifies the sign of described downlink tunnel to described local access network and closes and described gateway, upgrade the tunnel for local IP access downlink data transmission that described local access network closes described wireless side network element, and upgrade described gateway to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element; The down buffer storage data of described local IP access send to described user terminal by described gateway to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element;

Described user terminal paging to the tunnel for local IP access downlink data transmission that the described local IP access downlink data after connection status closes described wireless side network element by described local access network sends to described user terminal.

Or described mobile management parts are initiated tunnel and are upgraded, and comprising:

Described gateway is notified described MME by downlink data notification message by the access gateway address of received described downlink data or described IAD sign;

Described MME judges the source of described downlink data according to the sign of the access gateway address of described downlink data or described IAD, if described downlink data derives from described core net, described MME closes described downlink tunnel sign notice to described local access network, only upgrade the tunnel for local IP access downlink data transmission between described wireless side network element and described local access network pass, delete the local access network of preserving on gateway and close information; If described downlink data derives from described local access network and closes or derive from local access network pass and core net simultaneously, described MME notifies the sign of described downlink tunnel to described local access network and closes and described gateway, upgrade that described local access network closes and described wireless side network element between for the tunnel of local IP access downlink data transmission, and upgrade between described gateway and described wireless side network element the tunnel for local IP access down buffer storage transfer of data;

Described local IP access down buffer storage data send to described user terminal by described gateway to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element, and described user terminal paging to the tunnel for local IP access downlink data transmission that the described local IP access downlink data after connection status closes described wireless side network element by described local access network sends to described user terminal.

Described MME closes address notification to described gateway by the sign of described downlink tunnel and described local access network, upgrade the tunnel for local IP access down buffer storage transfer of data between described gateway and described wireless side network element, and, described gateway notifies described local access network to close the sign of described downlink tunnel, upgrades the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element;

Described local IP access down buffer storage data send to described user terminal by described gateway to the tunnel for local IP access down buffer storage transfer of data between described wireless side network element; Described user terminal paging to the tunnel for local IP access downlink data transmission that the described local IP access downlink data after connection status closes described wireless side network element by described local access network sends to described user terminal.

Preferably, when described mobile management parts are SGSN, described data buffer storage unit is arranged in described SGSN.Described mobile management parts are initiated tunnel and are upgraded, and comprising:

Described SGSN initiates the paging to described user terminal, and by described wireless side network element set up and described user terminal between radio bearer, described wireless side network element by with described user terminal between the sign of downlink tunnel corresponding to the radio bearer set up notify described SGSN;

Described SGSN directly sends to described user terminal by described local IP access down buffer storage data according to described downlink tunnel sign, and, described SGSN notifies described local access network to close the sign of described downlink tunnel, upgrades the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element; Described user terminal paging to the tunnel for local IP access downlink data transmission that the described local IP access downlink data after connection status closes described wireless side network element by described local access network sends to described user terminal.

Preferably, described wireless side network element comprises Home eNodeB, macro base station, femto gateway.

Preferably, the tunnel between described wireless side network element and described local access network pass is for local IP access downlink data transmission; Tunnel between described wireless side network element and described data buffer storage unit is for local IP access down buffer storage transfer of data.

Preferably, described local IP access comprises: the access of user terminal to the IP device of the IP device of home network or enterprise network, and user terminal is by home network, enterprise network or the access of macrocellular network to internet.

Support that in the communication system of local IP access, tunnel upgrades a system, comprising:

Data buffer storage unit, for downlink data described in buffer memory;

Confirmation unit, is arranged in the mobile management parts of core net, for confirming that described data buffer storage unit receives that the downlink data of user terminal and described user terminal have activated local IP access, trigger described the first updating block; Or described downlink data triggers the second updating block while only deriving from described core net if confirm, otherwise trigger the first updating block;

The first updating block, for upgrading between wireless side network element and described data buffer storage unit and described wireless side network element to the tunnel between local access network pass; And/or

The second updating block, upgrades for tunnel between described wireless side network element to described local access network is closed, and deletes the local access network pass information of preserving on gateway.

Preferably, when described mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.Described system also comprises:

Paging unit, is arranged in described MME, for described user terminal is initiated to paging;

Unit is set up in carrying, for setting up the radio bearer between described wireless side network element and described user terminal;

The first notification unit, is arranged in described wireless side network element, for by between described wireless side network element and described user terminal the sign of downlink tunnel corresponding to the radio bearer of setting up notify described MME;

Described the first updating block comprises:

Notice subelement, is arranged in described MME, for the sign of described downlink tunnel being notified to described local access network, closes and described gateway;

First sets up subelement, is positioned at the described local access network Central Shanxi Plain, for setting up the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element;

Second sets up subelement, is arranged in described gateway, for setting up the tunnel for local IP access down buffer storage transfer of data between described gateway and described wireless side network element;

First sends subelement, for described local IP access down buffer storage data are sent to described user terminal by the tunnel of setting up between described gateway and described wireless side network element; And

Second sends subelement, in described user terminal paging, described local IP access downlink data is closed by described local access network during to connection status and described wireless side network element between the tunnel set up send to described user terminal.

Or described system also comprises:

The second notification unit, for notifying described MME in downlink data notification message by the access gateway address or the described IAD sign that receive described downlink data;

The first notification unit, is arranged in described wireless side network element, for notifying described MME by the sign of the downlink tunnel of setting up between described wireless side network element and described user terminal;

Judging unit, be arranged in described MME, for originating according to the access gateway address of described downlink data or the described downlink data of described IAD sign judgement, if when described downlink data only derives from described core net, trigger described the second updating block, otherwise trigger the first unit more;

Described the first updating block comprises:

Notice subelement, closes and described gateway for the sign of described downlink tunnel being notified to described local access network;

First sends subelement, for described local IP access down buffer storage data are sent to described user terminal by the tunnel of setting up between described gateway and described wireless side network element;

Second sends subelement, for described user terminal paging, described local IP access downlink data is closed by described local access network during to connection status and described wireless side network element between the tunnel set up send to described user terminal;

Described the second updating block comprises:

Notice subelement, is arranged in described MME, for the sign of described downlink tunnel being notified to described local access network, closes;

Set up subelement, be positioned at the described local access network Central Shanxi Plain, for the tunnel for local IP access downlink data transmission of setting up between described local access network pass and described wireless side network element;

Send subelement, in described user terminal paging, described local IP access downlink data is closed by described local access network during to connection status and described wireless side network element between the tunnel set up send to described user terminal; And

Discharge subelement, be arranged in described MME, for the local access network of gateway is closed to information deletion.

Or described system also comprises:

Described the first updating block comprises:

The first notice subelement, for closing address notification to described gateway by the sign of described downlink tunnel and described local access network;

First sets up subelement, is arranged in described gateway, for being established to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element;

First sends subelement, for described local IP access down buffer storage data are set up to the tunnel that subelement sets up by described first, sends to described user terminal;

The second notice subelement, is arranged in described gateway, for the sign of described downlink tunnel being notified described local access network close;

Second sets up subelement, is positioned at the described local access network Central Shanxi Plain, for setting up the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element; And

Second sends subelement, for described local IP access downlink data being set up to the tunnel that subelement sets up by described second in described user terminal paging during to connection status, sends to described user terminal.

Preferably, when described mobile management parts are SGSN, described data buffer storage unit is arranged in described SGSN.Described system also comprises:

Paging unit, is arranged in described SGSN, for described user terminal is initiated to paging;

Notification unit, is arranged in described wireless side network element, for notifying described SGSN by the sign of the downlink tunnel of setting up between described wireless side network element and described user terminal;

Described the first updating block comprises:

First sends subelement, is arranged in described SGSN, for directly described local IP access down buffer storage data being sent to described user terminal according to described downlink tunnel sign;

Notice subelement, is arranged in described SGSN, for the sign of described downlink tunnel being notified described local access network close;

Set up subelement, for setting up the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element; And

In the present invention, when user terminal has activated local IP access in idle condition and described user terminal, and determining while receiving the downlink data of described user terminal, the mobile management parts of core net upgrade the tunnel of initiating between the data buffer storage unit of downlink data described in wireless side network element and buffer memory and between described wireless side network element and local access network pass, and when definite described downlink data derives from core net, can not initiate the renewal to the tunnel for local IP access down buffer storage transfer of data between wireless side network element and described data buffer storage unit, guaranteed the normal realization of local IP access function, the present invention program realizes simple and practical.

Accompanying drawing explanation

Fig. 1 is the structural representation of evolution grouping domain system;

Fig. 2 is the first structural representation of wireless side network element core network access;

Fig. 3 is the second structural representation of wireless side network element core network access;

Fig. 4 is the third structural representation of wireless side network element core network access;

Fig. 5 is the data flow path schematic diagram of local IP access and the access of traditional IP core network;

Fig. 6 is the flow chart that the embodiment of the present invention one LTE system core net carries out the renewal of local IP access tunnel;

Fig. 7 is the flow chart that the embodiment of the present invention two gprs system core net are carried out the renewal of local IP access tunnel;

Fig. 8 is the flow chart that the embodiment of the present invention three LTE system core nets carry out the renewal of local IP access tunnel;

Fig. 9 is the flow chart that the embodiment of the present invention four LTE system core nets carry out the renewal of local IP access tunnel;

Figure 10 is that the present invention supports tunnel in the communication system of local IP access to upgrade the composition structural representation of system.

Embodiment

Basic thought of the present invention is: when user terminal is in idle condition and while having activated local IP access function, the mobile management parts of core net after determining the downlink data that receives described user terminal upgrade the tunnel of initiating between the data buffer storage unit of downlink data described in wireless side network element and buffer memory and between described wireless side network element and local access network pass, and only when definite described downlink data derives from core net, can not initiate the tunnel between wireless side network element and described data buffer storage unit to upgrade, guaranteed the normal realization of local IP access function, the present invention program realizes simple and practical.

For making the object, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.

Fig. 6 is the flow chart that the embodiment of the present invention one LTE system core net carries out the renewal of local IP access tunnel, and as shown in Figure 6, the present embodiment LTE system core net carries out the renewal of local IP access tunnel and specifically comprises the following steps:

Step 601: user terminal is when idle condition, core network mobility management entity MME is transferred to core-network side by the downlink tunnel of local IP access, and the gateway that just data is sent to core net when downlink data is received in local access network pass carries out buffer memory.If downlink data is received from core net IAD, so also data can be sent to identical data buffer storage unit (by cached in serving gateway).

Step 602: gateway is informed core network mobility management entity by downlink data notification message after receiving downlink data.

Step 603: trigger paging in the wireless side network element of core network mobility management entity in user terminal Acceditation Area coverage, send beep-page message to user terminal.

Step 604: user terminal receives that beep-page message passes through this paging of initiating business request message response.

Step 605: core network mobility management entity is that user terminal is set up empty port load-supporting, sets up in request message the uplink tunnel sign of all built links, safe context, radio bearer service quality Q oS parameter etc. is sent to wireless side network element at initial context.

Step 606: wireless side network element is according to the radio bearer between the indication information foundation of core net and user terminal.

Step 607: wireless side network element is replied initial context to after empty port load-supporting has been set up core network mobility management entity and set up message, wherein carries the downlink tunnel sign of user terminal face data channel.

Step 608: core network mobility management entity determines that the current downlink data that has a user terminal arrives and this user terminal has activated local IP access function, the judgement of core network mobility administrative unit need to be upgraded two tunnels of wireless side network element to gateway and wireless side network element to local access network between closing.

Step 609: core network mobility management entity closes the downlink tunnel mark band of wireless side network element distribution by revising bearing request message to local access network.

Step 610: local access network closes to reply revises bearing response message.

Step 611: wireless side network element learns that by step 605 uplink tunnel of local IP access identifies, local access network close by step 609 obtain downlink tunnel that wireless side network element distributes identify local IP access up-downgoing data can normal transmission.

Step 612: core network mobility management entity by revise bearing request message by the downlink tunnel mark band of base station assigns to gateway.

Step 613: gateway is replied and revised bearing response message.

Step 614: gateway is sent to user terminal by the downlink data of buffer memory after receiving the downlink tunnel sign that wireless side network element distributes, and the local IP access upstream data of user terminal sends by step 611, no longer passes through gateway.

In actual applications, the foundation of the foundation in the direct tunnel of local IP access and local IP access forwarding tunnel does not have sequencing, and the step 609～step 611 in this example and step 612～step 614 can walk abreast and carry out.

In addition, when receiving the downlink data of sending from core net IAD, gateway also can carry out the present embodiment abovementioned steps, even if do not have local IP access downlink data to need local IP access downlink data tunnel to set up yet, when follow-up, can directly apply while having local IP access downlink data, therefore not to repeat here.

Support the Serving GPRS Support Node of S4 interface to be equal to Mobility Management Entity in application, can do equal covering, therefore not to repeat here.

Fig. 7 is the flow chart that the embodiment of the present invention two gprs system core net are carried out the renewal of local IP access tunnel, and as shown in Figure 7, the present embodiment gprs system core net is carried out the renewal of local IP access tunnel and specifically comprised the following steps:

Step 701: user terminal is when idle condition, core net Serving GPRS Support Node is transferred to core-network side by the downlink tunnel of local IP access, just data is sent to core net Serving GPRS Support Node and carry out buffer memory when downlink data is received in local access network pass.If downlink data is received from core net IAD, so also data can be sent to identical data buffer storage unit (by Serving GPRS Support Node buffer memory).

Step 702: trigger paging in the wireless side network element of core net Serving GPRS Support Node in user terminal Acceditation Area coverage.

Step 703: user terminal receives that beep-page message passes through the paging of initiating business request message response.

Step 704: core net Serving GPRS Support Node is that user terminal is set up empty port load-supporting, in RAB assignment request message, the uplink tunnel sign of all built links, transport layer information, RAB bearing parameter etc. is sent to wireless side network element.

Step 705: wireless side network element is according to the radio bearer between the indication information foundation of core net and user terminal.

Step 706: wireless side network element is replied RAB to Serving GPRS Support Node and assigned response message after empty port load-supporting has been set up, wherein carries the downlink tunnel sign that wireless side network element distributes.

Step 707: if Serving GPRS Support Node determines that the current downlink data that has a user terminal arrives and this user terminal has activated local IP access function, Serving GPRS Support Node judgement need to be upgraded the data tunnel of wireless side network element to local access network between closing for transmitting local IP access downlink data.Because step 701 local IP access down buffer storage data buffer storage is at Serving GPRS Support Node, therefore Serving GPRS Support Node is after obtaining the downlink tunnel sign that wireless side network element that 706 steps carry distributes, just can directly issue the downlink data of institute's buffer memory, the PDP Context that does not need Serving GPRS Support Node to be initiated to again respective cache unit (on aforesaid gateway) upgrades operation.

Step 708: core net Serving GPRS Support Node sends to local access network to close the downlink tunnel sign of wireless side network element distribution by upgrading PDP Context request message.

Step 709: local access network closes to reply revises bearing response message.

Step 710: wireless side network element learns that by step 704 uplink tunnel of local IP access link identifies, local access network close by step 708 obtain downlink tunnel that wireless side network element distributes identify local IP access up-downgoing data can normal transmission.

Step 711: core net Serving GPRS Support Node is received after the downlink tunnel of wireless side network element distribution identifies the downlink data of buffer memory is sent to user terminal, the local IP access upstream data of user terminal sends by step 710, no longer passes through core net Serving GPRS Support Node.

In actual applications, the foundation of the foundation in the direct tunnel of local IP access and local IP access forwarding tunnel does not have sequencing, and step 708 of the present invention and step 711 can walk abreast and carry out.

In addition, when receiving the downlink data of sending from core net IAD, core net Serving GPRS Support Node also can carry out the abovementioned steps of the present embodiment, even if do not have local IP access downlink data to need local IP access downlink data tunnel to set up yet, when follow-up, can directly apply while having local IP access downlink data, at this, not do repeating in flow process.

Fig. 8 is the flow chart that the embodiment of the present invention three LTE system core nets carry out the renewal of local IP access tunnel, and as shown in Figure 8, the present embodiment LTE system core net carries out the renewal of local IP access tunnel and specifically comprises the following steps:

Step 801: user terminal is when idle condition, core network mobility management entity is transferred to core-network side by the downlink tunnel of local IP access, when downlink data is received in local access network pass, just received downlink data is sent to gateway and carries out buffer memory.If downlink data is received from core net IAD, so also data buffer storage can be arrived to identical data buffer storage unit.

Step 802: gateway is informed core network mobility management entity by downlink data notification message after receiving downlink data.In message, carry access gateway address or the IAD identification information of downlink data receiving.

Step 803: trigger paging in the wireless side network element of core network mobility management entity in user terminal Acceditation Area coverage.

Step 804: user terminal receives that beep-page message passes through the paging of initiating business request message response.

Step 805: core network mobility management entity is that user terminal is set up empty port load-supporting, sets up in request message the uplink tunnel sign of all built links, safe context, radio bearer qos parameter etc. are sent to wireless side network element at initial context.

Step 806: wireless side network element is according to the radio bearer between the indication information foundation of core net and user terminal.

Step 807: wireless side network element is replied initial context to after empty port load-supporting has been set up core network mobility management entity and set up message, wherein carries the downlink tunnel sign of user terminal face data channel.

Step 808: if core network mobility management entity determines that the current downlink data that has a user terminal arrives and this user terminal has activated local IP access function, and according to the access gateway address of data buffer storage unit indication or IAD sign, determined the source of downlink data, core network mobility management entity judge whether to upgrade wireless side network element between gateway for transmitting the data cached tunnel of local IP access.Concrete:

When core network mobility management entity learn downlink data source for local access network pass need to upgrade wireless side network element between gateway for transmitting the data cached tunnel of local IP access.

When core network mobility management entity learn downlink data source for core net IAD do not need to upgrade wireless side network element between gateway for transmitting the data cached tunnel of local IP access, the local access network of deleting in gateway closes information.

When core network mobility management entity learn downlink data source for local access network pass and core net IAD need to upgrade wireless side network element between gateway for transmitting the data cached tunnel of local IP access.

No matter where downlink data derives from, and the local IP access tunnel between wireless side network element and local access network close is all determined needs renewal, to can directly apply while having local IP access downlink data follow-up.

Step 809: core network mobility management entity closes the downlink tunnel mark band of wireless side network element distribution by revising bearing request message to local access network.

Step 810: local access network closes to reply revises bearing response message.

Step 811: wireless side network element learns that by step 805 uplink tunnel of local IP access identifies, local access network close by step 809 obtain downlink tunnel that wireless side network element distributes identify local IP access up-downgoing data can normal transmission.

Step 812: core network mobility management entity according to the judged result of step 808 by revise bearing request message optionally by the downlink tunnel mark band of base station assigns to gateway.Carry out the optional renewal of forwarding tunnel.If downlink data only derives from core net, core network mobility management entity initiates to delete session request so, and the local access network pass information that S-GW is preserved is deleted.

Step 813: gateway is replied and revised bearing response message.

Step 814: gateway is sent to user terminal by the downlink data of buffer memory after receiving the downlink tunnel sign that wireless side network element distributes, and the local IP access upstream data of user terminal sends by step 811, no longer passes through gateway.

In actual applications, the foundation of the foundation in the direct tunnel of local IP access and local IP access forwarding tunnel does not have sequencing, and step 809 of the present invention can walk abreast and carry out with step 812.

Support the Serving GPRS Support Node of S4 interface to be equal to Mobility Management Entity in application, do not repeat them here its specific implementation details, can with reference to the step shown in Fig. 7 and Fig. 8, understand simultaneously.

For gprs system, as shown in Figure 8, the Serving GPRS Support Node of support gn interface can go out Data Source by automatic decision as the buffer of downlink data, because upgrading, the tunnel of down buffer storage data completes in SGSN inside, therefore the optimal way that tunnel upgrades does not have obvious benefit under this scene, at this, does not describe.

Fig. 9 is the flow chart that the embodiment of the present invention four LTE system core nets carry out the renewal of local IP access tunnel, and as shown in Figure 9, the present embodiment LTE system core net carries out local IP access tunnel, and to upgrade concrete steps as follows:

Step 901: user terminal is when idle condition, and core network mobility management entity is transferred to core-network side by the downlink tunnel of local IP access just sends to data gateway and carries out buffer memory when downlink data is received in local access network pass.If downlink data is received from core net IAD, so also data buffer storage can be arrived to identical data buffer storage unit.

Step 902: gateway is informed core network mobility management entity by downlink data notification message after receiving downlink data.

Step 903: trigger paging in the wireless side network element of core network mobility management entity in user terminal Acceditation Area coverage.

Step 904: user terminal receives that beep-page message passes through the paging of initiating business request message response.

Step 905: core network mobility management entity is that user terminal is set up empty port load-supporting, sets up in request message the uplink tunnel sign of all built links, safe context, radio bearer qos parameter etc. are sent to wireless side network element at initial context.

Step 906: wireless side network element is according to the radio bearer between the indication information foundation of core net and user terminal.

Step 907: wireless side network element is replied initial context to after empty port load-supporting has been set up core network mobility management entity and set up message, wherein carries the downlink tunnel sign of user terminal face data channel.

Step 908: if core network mobility management entity determines that the current downlink data that has a user terminal arrives and this user terminal has activated local IP access function, core network mobility administrative unit is determined two data tunnels between need to upgrade wireless side network element to gateway and wireless side network element to local access network closes.

Step 909: core network mobility management entity brings gateway by revising bearing request message by the downlink tunnel sign of wireless side network element distribution and local access network pass address information.Gateway is received after downlink tunnel identifies and can be got through and down forward tunnel.

Step 910: gateway is received after the address information that local access network closes to close to send to this local access network and revised the downlink tunnel mark band that bearing request message distributes wireless side network element and close the direct tunnel of getting through local IP access downlink data to local access network.

Step 911: local access network closes to reply revises bearing response message.

Step 912: it is complete with the tunnel renewal that direct transfers that gateway down forwards tunnel to Mobility Management Entity reply modification carrying corresponding message notice.

Step 913: wireless side network element learns that by step 905 uplink tunnel of local IP access identifies, local access network close by step 910 obtain downlink tunnel that wireless side network element distributes identify local IP access up-downgoing data can normal transmission.

Step 914: gateway is sent to user terminal by the downlink data of buffer memory after step 909 receives the downlink tunnel sign that wireless side network element distributes, and the local IP access upstream data of user terminal sends by step 913, no longer passes through gateway.

In the present embodiment, local IP access forwarding tunnel is first set up in step 909, and the direct tunnel of local IP access is in the rear foundation of step 910, so under this scene, the foundation of two data tunnels exists sequencing.

In addition, when receiving the downlink data of sending from core net IAD, also can carry out gateway step described in the present embodiment, even if do not have local IP access downlink data to need local IP access downlink data tunnel to set up yet, when follow-up, can directly apply while having local IP access downlink data, therefore not to repeat here.

Support the Serving GPRS Support Node of S4 interface to be equal to above-mentioned Mobility Management Entity in application.

For gprs system, as shown in Figure 9, because the renewal of local IP access forwarding tunnel belongs to the built-in function of Serving GPRS Support Node, so there is not indirect advice method, SGSN closes address according to the local access network of preserving directly to initiate to upgrade.

Tunnel in preceding method of the present invention between wireless side network element and described local access network pass is for local IP access downlink data transmission; Tunnel between described wireless side network element and described data buffer storage unit is for local IP access down buffer storage transfer of data.Local IP access comprises: user terminal is to the access of the IP device of the IP device of home network or enterprise network etc., and user terminal by home network, enterprise network or macrocellular network to the access of internet etc.

Figure 10 is that the present invention supports tunnel in the communication system of local IP access to upgrade the composition structural representation of system, as shown in figure 10, the present invention supports that in the communication system of local IP access, tunnel renewal system comprises data buffer storage unit 1001, confirmation unit 1002, the first updating block 1003 and/or the second updating block 1004, wherein, data buffer storage unit 1001 is for downlink data described in buffer memory; Confirmation unit 1002 is arranged in the mobile management parts of core net, for confirming that data buffer storage unit 1001 receives that the downlink data of user terminal and described user terminal have activated local IP access, triggers the first updating block 1003; Or described downlink data triggers the second updating block 1004 while only deriving from described core net if confirm, otherwise trigger the first updating block 1003; The first updating block 1003 is for upgrading between wireless side network element and described data buffer storage unit and described wireless side network element to the tunnel between local access network pass; The second updating block 1004 upgrades for the tunnel between described wireless side network element to described local access network is closed.Wherein, mobile management parts comprise Mobility Management Entity MME in long evolving system or the Serving GPRS Support Node SGSN in general packet radio service gprs system.Tunnel in the present invention between wireless side network element and described local access network pass is for local IP access downlink data transmission; Tunnel between described wireless side network element and described data buffer storage unit is for local IP access down buffer storage transfer of data.

When mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.Now, the present invention supports in the communication system of local IP access that tunnel upgrades system and also comprises: paging unit, is arranged in described MME, for described user terminal is initiated to paging; Unit is set up in carrying, for setting up the radio bearer between described wireless side network element and described user terminal; The first notification unit, is arranged in described wireless side network element, for by between described wireless side network element and described user terminal the sign of downlink tunnel corresponding to the radio bearer of setting up notify described MME; Described the first updating block comprises:

Second sets up subelement, is arranged in described gateway, for setting up the tunnel for local IP access down buffer storage transfer of data between described gateway and described wireless side network element; And

When mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.Now, the present invention supports in the communication system of local IP access that tunnel upgrades system and also comprises: the second notification unit, for notifying described MME in downlink data notification message by the access gateway address or the described IAD sign that receive described downlink data; Paging unit, is arranged in described MME, for described user terminal is initiated to paging; Unit is set up in carrying, for setting up the radio bearer between described wireless side network element and described user terminal; The first notification unit, is arranged in described wireless side network element, for notifying described MME by the sign of the downlink tunnel of setting up between described wireless side network element and described user terminal; Judging unit, be arranged in described MME, for originating according to the access gateway address of described downlink data or the described downlink data of described IAD sign judgement, if when described downlink data only derives from described core net, trigger described the second updating block, otherwise trigger the first unit more; Described the first updating block comprises: notice subelement, closes and described gateway for the sign of described downlink tunnel being notified to described local access network; First sets up subelement, is positioned at the described local access network Central Shanxi Plain, for setting up the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element; Second sets up subelement, is arranged in described gateway, for setting up the tunnel for local IP access down buffer storage transfer of data between described gateway and described wireless side network element; First sends subelement, for described local IP access down buffer storage data are sent to described user terminal by the tunnel of setting up between described gateway and described wireless side network element; Second sends subelement, for described user terminal paging, described local IP access downlink data is closed by described local access network during to connection status and described wireless side network element between the tunnel set up send to described user terminal; Described the second updating block comprises: notice subelement, be arranged in described MME, and for the sign of described downlink tunnel being notified to described local access network, close; Set up subelement, be positioned at the described local access network Central Shanxi Plain, for the tunnel for local IP access downlink data transmission of setting up between described local access network pass and described wireless side network element; Send subelement, in described user terminal paging, described local IP access downlink data is closed by described local access network during to connection status and described wireless side network element between the tunnel set up send to described user terminal; Discharge subelement, be arranged in described MME, for the local access network of gateway is closed to information deletion.

When mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.Now, the present invention supports in the communication system of local IP access that tunnel upgrades system and also comprises: paging unit, is arranged in described MME, for described user terminal is initiated to paging; Unit is set up in carrying, for setting up the radio bearer between described wireless side network element and described user terminal; The first notification unit, is arranged in described wireless side network element, for notifying described MME by the sign of the downlink tunnel of setting up between described wireless side network element and described user terminal; Described the first updating block comprises: the first notice subelement, for the sign of described downlink tunnel and described local access network are closed to address notification to described gateway; First sets up subelement, is arranged in described gateway, for being established to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element; First sends subelement, for described local IP access down buffer storage data are set up to the tunnel that subelement sets up by described first, sends to described user terminal; The second notice subelement, is arranged in described gateway, for the sign of described downlink tunnel being notified described local access network close; Second sets up subelement, is positioned at the described local access network Central Shanxi Plain, for setting up the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element; Second sends subelement, for described local IP access downlink data being set up to the tunnel that subelement sets up by described second in described user terminal paging during to connection status, sends to described user terminal.

When described mobile management parts are SGSN, described data buffer storage unit is arranged in described SGSN.Now, the present invention supports in the communication system of local IP access that tunnel upgrades system and also comprises: paging unit, is arranged in described SGSN, for described user terminal is initiated to paging; Unit is set up in carrying, for setting up the radio bearer between described wireless side network element and described user terminal; Notification unit, is arranged in described wireless side network element, for notifying described SGSN by the sign of the downlink tunnel of setting up between described wireless side network element and described user terminal; Described the first updating block comprises: first sends subelement, is arranged in described SGSN, for directly described local IP access down buffer storage data being sent to described user terminal according to described downlink tunnel sign; Notice subelement, is arranged in described SGSN, for the sign of described downlink tunnel being notified described local access network close; Set up subelement, for setting up the tunnel for local IP access downlink data transmission between described local access network pass and described wireless side network element; Second sends subelement, in described user terminal paging, described local IP access downlink data is closed by described local access network during to connection status and described wireless side network element between the tunnel set up send to described user terminal.

In the present invention, wireless side network element comprises Home eNodeB, macro base station, femto gateway etc.Local IP access comprises: user terminal is to the access of the IP device of the IP device of home network or enterprise network etc., and user terminal by home network, enterprise network or macrocellular network to the access of internet etc.

Those skilled in the art are to be understood that, in the communication system of the support local IP access shown in Figure 10, tunnel renewal system is to arrange for realizing tunnel updating method in the communication system of aforesaid support local IP access, in system shown in Figure 10, the function of each processing unit can be with reference to the description of method shown in Fig. 6 to Fig. 9 and understand, the function of each processing unit can realize by the program running on processor, also can realize by concrete logical circuit.

The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims

1. support a tunnel updating method in the communication system of local IP access, it is characterized in that, comprising:

Core network mobility management component receives when the downlink data notification of data buffer storage unit and user terminal have activated local IP access, and described mobile management parts are initiated the renewal to tunnel between wireless side network element and described data buffer storage unit and between described wireless side network element and local access network pass; Or described mobile management parts are according to down buffer storage Data Source, initiate between described wireless side network element and described local access network pass and the optionally renewal to tunnel between described wireless side network element and described data buffer storage unit.

2. method according to claim 1, is characterized in that, described mobile management parts comprise Mobility Management Entity MME in long evolving system or the Serving GPRS Support Node SGSN in general packet radio service gprs system.

3. method according to claim 2, is characterized in that, when described mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.

4. method according to claim 3, is characterized in that, described mobile management parts are initiated tunnel and upgraded, and comprising:

Described MME notifies the sign of described downlink tunnel to described local access network and closes and described gateway, upgrade the tunnel for local IP access downlink data transmission that described local access network closes described wireless side network element, and upgrade described gateway to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element;

The down buffer storage data of described local IP access send to described user terminal by described gateway to the tunnel for local IP access down buffer storage transfer of data of described wireless side network element;

5. method according to claim 3, is characterized in that, described mobile management parts are initiated tunnel and upgraded, and comprising:

6. method according to claim 3, is characterized in that, described mobile management parts are initiated tunnel and upgraded, and comprising:

7. method according to claim 2, is characterized in that, when described mobile management parts are SGSN, described data buffer storage unit is arranged in described SGSN.

8. method according to claim 7, is characterized in that, described mobile management parts are initiated tunnel and upgraded, and comprising:

9. according to the method described in any one in claim 1 to 8, it is characterized in that, described wireless side network element comprises Home eNodeB, macro base station, femto gateway.

10. according to the method described in any one in claim 1 to 8, it is characterized in that, the tunnel between described wireless side network element and described local access network close is for local IP access downlink data transmission; Tunnel between described wireless side network element and described data buffer storage unit is for local IP access down buffer storage transfer of data.

11. according to the method described in any one in claim 1 to 8, it is characterized in that, described local IP access comprises: the access of user terminal to the IP device of the IP device of home network or enterprise network, and user terminal is by home network, enterprise network or the access of macrocellular network to internet.

In 12. 1 kinds of communication systems of supporting local IP access, tunnel upgrades system, it is characterized in that, comprising:

Data buffer storage unit, for buffer memory downlink data;

Confirmation unit, is arranged in the mobile management parts of core net, for confirming that described data buffer storage unit receives that the downlink data of user terminal and described user terminal have activated local IP access, triggers the first updating block; Or described downlink data triggers the second updating block while only deriving from described core net if confirm, otherwise trigger the first updating block;

The second updating block, upgrades and deletes the local access network of preserving on gateway for the tunnel between described wireless side network element to described local access network is closed and close information.

13. systems according to claim 12, is characterized in that, described mobile management parts comprise Mobility Management Entity MME in long evolving system or the Serving GPRS Support Node SGSN in general packet radio service gprs system.

14. systems according to claim 13, is characterized in that, when described mobile management parts are MME, described data buffer storage unit is arranged in the gateway of described core net.

15. systems according to claim 14, is characterized in that, described system also comprises:

Described the first updating block comprises:

16. systems according to claim 14, is characterized in that, described system also comprises:

Described the first updating block comprises:

Described the second updating block comprises:

17. systems according to claim 14, is characterized in that, described system also comprises:

Described the first updating block comprises:

18. systems according to claim 13, is characterized in that, when described mobile management parts are SGSN, described data buffer storage unit is arranged in described SGSN.

19. systems according to claim 18, is characterized in that, described system also comprises:

Described the first updating block comprises:

20. according to claim 12 to the system described in any one in 19, it is characterized in that, described wireless side network element comprises Home eNodeB, macro base station, femto gateway.

21. according to claim 12 to the system described in any one in 19, it is characterized in that, the tunnel between described wireless side network element and described local access network close is for local IP access downlink data transmission; Tunnel between described wireless side network element and described data buffer storage unit is for local IP access down buffer storage transfer of data.

22. according to claim 12 to the system described in any one in 19, it is characterized in that, described local IP access comprises: the access of user terminal to the IP device of the IP device of home network or enterprise network, and user terminal is by home network, enterprise network or the access of macrocellular network to internet.