CN102076054A

CN102076054A - Direct forwarding tunnel setup and using method, system and equipment

Info

Publication number: CN102076054A
Application number: CN2011100405894A
Authority: CN
Inventors: 焦斌; 梁靖
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT
Priority date: 2011-02-18
Filing date: 2011-02-18
Publication date: 2011-05-25

Abstract

The embodiment of the invention discloses a direct forwarding tunnel setup and using method, a system and equipment, relating to the technical field of radio communication, aiming at reducing the data configuration volume of core network equipment. In the invention, a source access network node determines a target access network node, wherein the target access network node and the source access network node use different radio access technologies (RAT); the source access network node transmits request information for acquiring the GPRS Tunneling Protocol (GTP) tunnel path information of the target access network node to the target access network node; and the source access network node initiates the setup process of a direct forwarding tunnel to the target access network node according to the acquired GTP tunnel path information. By using the method, the data configuration volume of the core network equipment can be effectively reduced.

Description

Directly transmit foundation and using method, system and the equipment in tunnel

Technical field

The present invention relates to wireless communication field, relate in particular to foundation and using method, system and the equipment in a kind of direct forwarding tunnel.

Background technology

(Universal Terrestrial Radio Access Network, network architecture diagram UTRAN) as shown in Figure 1 for universal land radio access web.

(Evolved Universal Terrestrial Radio AccessNetwork, network architecture diagram EUTRAN) as shown in Figure 2 for the universal land radio access web of evolution.

Between wireless access technology (inter-radio access technology, Inter-RAT) detailed content of switching flow can be carried out the simple introduction of related content below referring to 3GPP TS23.401:

As shown in Figure 3, the switching preparation process from UTRAN to EUTRAN is as follows:

Step 1: decision switches to target BS (Target eNB) with terminal (UE) to source radio network controller (Source RNC) according to self algorithm.

Step 2:Source RNC sends to source Serving GPRS Support Node (Source Serving GPRS Support Node, Source SGSN) with the identification information and the target TAI information of target eNB; SourceSGSN is according to target TAI Information Selection target mobility management entity (Target Mobility ManagementEntity, Target MME).

Step 3:Target MME judge whether need for UE change gateway (Serving Gateway S-GW), if desired, then triggers the process of step 4 and step 4a, otherwise, to step 5;

Set up session between step 4-step 4a:Target MME and the target S-GW;

Step 5-step 5a:Target MME triggers the set up process of UE context in target eNB according to the identification information of the target eNB of step 3 acquisition.The configuration information that uses in target eNB after target eNB is switched UE sends to Target MME by the mode of container (Container).

Step 6-step 6a:Target MME is according to the configuration information of preserving in advance, what determine the network use is direct tunnel pass-through mode or indirect tunnel pass-through mode, if the indirect tunnel of network using pass-through mode, then be triggered to the indirect forwarding tunnel establishment procedure of target S-GW, if the direct tunnel of network using pass-through mode then is not triggered to the indirect forwarding tunnel establishment procedure of target S-GW.

Step 7:Target MME determines that according to the configuration information of self needs carry out the carrying tabulation of data forwarding, and carrying list information and the UE switching back that needs are transmitted indirectly sent to source SGSN at the container of the configuration information of target eNB use.

Step 8-step 8a: source SGSN is according to the configuration information of preserving in advance, what determine the network use is direct tunnel pass-through mode or indirect tunnel pass-through mode, if the indirect tunnel of network using pass-through mode, then trigger the indirect forwarding tunnel establishment procedure of source S-GW to target S-GW, if the direct tunnel of network using pass-through mode does not then trigger the indirect forwarding tunnel establishment procedure of source S-GW to target S-GW.

As shown in Figure 4, the switching flow from UTRAN to EUTRAN is as follows:

Step 1: the container of the configuration information that uses in target eNB after carrying list information that the needs that source SGSN will receive from MME are before transmitted and corresponding target Tunnel Identifier (TEID) information, UE switch sends to Souce RNC by reorientation order (Relocation Command) message.In this step, source SGSN can reach information according to pre-configured source RNC and determine that the mode of using direct tunnel to transmit still is that indirect tunnel pass-through mode carries out data forwarding to the direct tunnel of target BS, if use direct tunnel pass-through mode, then the TEID that sends to Souce RNC is direct tunnel mark information, if use indirect tunnel pass-through mode, then the TEID that sends to Souce RNC is indirect tunnel mark information;

Step 2:Souce RNC disposes to UE by from switching command (the HO From UTRANcommand) message of UTRAN UE being switched the configuration information that uses in target eNB the back.

The configuration information in the target eNB use that step 3-step 4:UE receives before using is attempted inserting from target eNB.

Step 5-step 5a:Souce RNC after sending HO From UTRAN command message, according to TEID information by directly transmitting tunnel (step 5) or transmit tunnel (step 5a) indirectly the data of UE transmission are transmitted.After this, also need to finish following flow process:

The process of target S-GW is moved in user's face tunnel from source S-GW; UE is accomplished to tracing area (tracking area, renewal process TA) of target side core net; And finish the contextual dispose procedure of UE on indirect forwarding tunnel resource and the source S-GW.

As shown in Figure 5, be the switching preparation process from EUTRAN to UTRAN, as shown in Figure 6, be the switching flow from EUTRAN to UTRAN, flow process from EUTRAN to UTRAN is consistent to the EUTRAN flow process with UTRA, and just corresponding message name is different with the core network entity title with Access Network nuclear.Here no longer repeat.

As seen, in the prior art, under the Inter-RAT handoff scenario, allow the source access network node, will wait to transmit data forwarding to the target access network node by directly transmitting the tunnel.For the direct forwarding tunnel of source access network node itself to the target access network node, mainly be that mode by static configuration realizes in the prior art, that is: in advance at the direct tunnel reachability information of core net node source of configuration access network node to the target access network node, switch in the set-up procedure at Inter-RAT, core net node is according to the direct tunnel reachability information of pre-configured source access network node to the target access network node, determine that network uses direct tunnel pass-through mode or indirect tunnel pass-through mode, if use indirect tunnel pass-through mode, then trigger the process of setting up of transmitting the tunnel indirectly; In the Inter-RAT handoff procedure, core net node is according to the direct tunnel reachability information of pre-configured source access network node to the target access network node, determine that network uses direct tunnel pass-through mode or indirect tunnel pass-through mode, and send corresponding target Tunnel Identifier to the source access network node according to definite result, the source access network node uses direct forwarding tunnel according to the target Tunnel Identifier that obtains or transmits the tunnel indirectly and carry out data forwarding, for example, for the handoff scenario from UTRAN to EUTRAN, as shown in Figure 4, Source RNC obtains the target Tunnel Identifier by Relocation Command message, and for the handoff scenario from EUTRAN to UTRAN, as shown in Figure 6, Source eNB obtains the target Tunnel Identifier by switching command (Handover Command) message.

In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:

Prior art can effectively be worked to relating under the less situation of source access network node and target access network interstitial content, if but source access network node or target access network interstitial content are more, for example, in the LTE system, use prior art will increase the data configuration amount of equipment of the core network on the one hand greatly because need at the combined situation of active access network node and target access network node be configured.On the other hand, if the configuration of source access network node or target access network node (for example Home eNodeB or little base station) relatively flexibly will cause the data configuration renewal process of core net too frequent, thereby influence the reliability of network efficiency and network.

Summary of the invention

The embodiment of the invention provides the method for building up and the equipment in a kind of direct forwarding tunnel, is used to strengthen the flexibility of setting up direct forwarding tunnel.

The method for building up in a kind of direct forwarding tunnel, this method comprises:

The source access network node is determined the target access network node, and the target access network node uses different wireless access technology RAT with the source access network node;

The source access network node sends the request message of the GTP tunnel routing information that obtains the target access network node to the target access network node;

The source access network node is initiated to the process of setting up in the direct forwarding tunnel of target access network node according to the GTP tunnel routing information that gets access to.

The apparatus for establishing in a kind of direct forwarding tunnel, this equipment comprises:

Determining unit is used for determining the target access network node, and the target access network node uses different wireless access technology RAT with the source access network node;

Acquiring unit is used for sending to the target access network node request message of the GTP tunnel routing information obtain the target access network node;

Set up the unit, be used for being initiated to the process of setting up in the direct forwarding tunnel of target access network node according to the GTP tunnel routing information that gets access to.

In this programme, the source access network node is determined the target access network node, and the target access network node uses different RAT with the source access network node; Send the request message of the GTP tunnel routing information that obtains the target access network node to the target access network node; According to the GTP tunnel routing information that gets access to, be initiated to the process of setting up in the direct forwarding tunnel of target access network node.Initiatively be triggered to the process of setting up in the direct forwarding tunnel of target access network node by the source access network node, strengthened greatly and set up the flexibility of directly transmitting the tunnel.

The embodiment of the invention provides a kind of tunnel information sending method and equipment, is used to solve the problem how the source access network node obtains the GTP tunnel routing information of target access network node.

A kind of tunnel information sending method, this method comprises:

The target access network node receives the request message from the GTP tunnel routing information that obtains the target access network node of source access network node;

The target access network node sends the GTP tunnel routing information of target access network node to the source access network node.

A kind of tunnel information transmitting apparatus, this equipment comprises:

Receiving element is used to receive the request message from the GTP tunnel routing information that obtains the target access network node of source access network node;

Transmitting element is used for the GTP tunnel routing information to source access network node transmission target access network node.

In this programme, after the target access network node receives request message from the GTP tunnel routing information that obtains the target access network node of source access network node, send the GTP tunnel routing information of target access network node to the source access network node.Thereby solved the problem how the source access network node obtains the GTP tunnel routing information of target access network node.

The embodiment of the invention provides a kind of pass-through mode indicating means, system and equipment, is used to be reduced in the data configuration amount of equipment of the core network.

A kind of pass-through mode indicating means, this method comprises:

The core net node of source access network node ownership receives and the direct tunnel of the target access network node that the source of preservation access network node sends can reach information;

The Inter-RAT switching flow, core net node can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding the wireless access technology of terminal from the source access network node to the target access network node.

A kind of pass-through mode indicating equipment, this equipment comprises:

Receiving element, the direct tunnel that is used to receive and preserve the target access network node that the source access network node sends can reach information;

Indicating member, be used in terminal Inter-RAT switching flow wireless access technology, can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding from the source access network node to the target access network node.

A kind of wireless communication system, this system comprises:

The source access network node is used for determining the target access network node, and the target access network node uses different wireless access technology RAT with the source access network node; Send the request message of the GTP tunnel routing information that obtains the target access network node to the target access network node; According to the GTP tunnel routing information that gets access to, be initiated to the process of setting up in the direct forwarding tunnel of target access network node;

The target access network node is used to receive described request message, sends the GTP tunnel routing information of target access network node to the source access network node.

In this programme, the core net node of source access network node ownership receives and the direct tunnel of the target access network node that the source of preservation access network node sends can reach information; The Inter-RAT switching flow, core net node can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding the wireless access technology of terminal from the source access network node to the target access network node.As seen, in this programme, send direct tunnel by the source access network node to core net node and can reach information, and do not need in advance at equipment of the core network configuration and the source of maintenance access network node to effectively reduce the data configuration amount at equipment of the core network to the direct forwarding tunnel reachability information of target access network node.

Description of drawings

Fig. 1 is a UTRAN network architecture schematic diagram of the prior art;

Fig. 2 is an EUTRAN network architecture schematic diagram of the prior art;

Fig. 3 is the switching preparation process schematic diagram from UTRAN to EUTRAN of the prior art;

Fig. 4 is the switching flow schematic diagram from UTRAN to EUTRAN of the prior art;

Fig. 5 is the switching preparation process schematic diagram from EUTRAN to UTRAN of the prior art;

Fig. 6 is the switching flow schematic diagram from EUTRAN to UTRAN of the prior art;

The method flow schematic diagram that Fig. 7 provides for the embodiment of the invention;

The other method schematic flow sheet that Fig. 8 provides for the embodiment of the invention;

The another method flow schematic diagram that Fig. 9 provides for the embodiment of the invention;

Figure 10 A is the schematic flow sheet of the embodiment of the invention one;

Figure 10 B is the schematic flow sheet of the embodiment of the invention two;

Figure 10 C is the schematic flow sheet of the embodiment of the invention three;

Figure 10 D is the schematic flow sheet of the embodiment of the invention four;

Figure 10 E is the schematic flow sheet of the embodiment of the invention five;

Figure 10 F is the schematic flow sheet of the embodiment of the invention six;

The system configuration schematic diagram that Figure 11 provides for the embodiment of the invention;

The device structure schematic diagram that Figure 12 provides for the embodiment of the invention;

Another device structure schematic diagram that Figure 13 provides for the embodiment of the invention;

The another device structure schematic diagram that Figure 14 provides for the embodiment of the invention.

Embodiment

In order to be reduced in the data configuration amount of equipment of the core network, the embodiment of the invention provides the foundation and the using method in a kind of direct forwarding tunnel, in this method, is triggered to the process of setting up in the direct forwarding tunnel of target access network node by the source access network node.

Referring to Fig. 7, the method for building up in the direct forwarding tunnel that the embodiment of the invention provides specifically may further comprise the steps:

Step 70: the source access network node is determined the target access network node, and the target access network node uses different wireless access technologys (RAT) with the source access network node;

Step 71: the source access network node sends the request message of the GTP tunnel routing information that obtains the target access network node to the target access network node, the GTP tunnel routing information of target access network node comprises user's face transmission path address (IP) information of target access network node, also can be called the transport layer address information here;

Step 72: the source access network node is initiated to the process of setting up in the direct forwarding tunnel of target access network node according to the GTP tunnel routing information that gets access to.The concrete process of setting up can be referring to 3GPP TS29.060 and 3GPP TS 29.281.

In the step 70, the source access network node is determined the target access network node, and its specific implementation can be as follows:

The source access network node is according to adjacent cell relation information, determine adjacent with the sub-district of source access network node management and with the sub-district that the origin access network node uses different RAT, the access network node of managing this sub-district is defined as the target access network node.

In the step 71, the source access network node sends the request message of the GTP tunnel routing information obtain the target access network node to the target access network node, and its specific implementation can be as follows:

The source access network node is by the core net node of self ownership and the core net node of target access network node ownership, send directly forwarding tunnel information message transfer to the target access network node, the GTP tunnel routing information of target access network node is returned to the source access network node with the request target access network node.

The source access network node can carry following information in the direct forwarding tunnel information message transfer that the target access network node sends: be used for and will directly transmit the routing iinformation that the tunnel information message transfer sends to the target access network node, for example, the access network equipment of Target cell TAI information, Target Cell Identifier or the management objectives sub-district of objective network sign; The identification information of source access network node, for example, the RAI information of the device identification of source access network node, source access network node affiliated subdistrict.

The source access network node can also carry the GTP tunnel routing information of active access network node in the direct forwarding tunnel information message transfer that the target access network node sends.

Preferable, after the source access network node got access to the GTP tunnel routing information, the source access network node can reach the direct tunnel of target access network node the core net node that information sends to source access network node ownership; Directly the tunnel can reach the FLag indicating bit that information can be a 1bit, is used to indicate the source access network node can use to the direct forwarding tunnel of target access network node.

The source access network node (Inter-RAT) switching flow, is selected to use described direct forwarding tunnel according to the indication of core net node, to the target access network node for data forwarding the wireless access technology of terminal from the source access network node to the target access network node.

Concrete, above-mentioned source access network node can reach the direct tunnel of target access network node at the core net node that information sends to source access network node ownership, and its specific implementation can be as follows:

The source access network node can reach the direct tunnel of target access network node at the core net node that information sends to source access network node ownership the Inter-RAT switching preparation process of terminal from the source access network node to the target access network node; Perhaps,

When the source access network node can reach situation according to the predefined time cycle or in the direct tunnel to the target access network node and changes, the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership.

Concrete, if the source access network node is the radio network controller (RNC) in the universal land radio access web (UTRAN), then core net node selects to use described direct forwarding tunnel to the target access network node for data forwarding by reorientation order (Relocation Command) message indication source access network node, is about to send to the source access network node after described direct forwarding tunnel mark information is carried in the Relocation Command message;

If described source access network node is the base station in the universal land radio access web (EUTRAN) of evolution, then core net node selects to use described direct forwarding tunnel to the target access network node for data forwarding by switching command (Handover Command) message indication source access network node, is about to send to the source access network node after described direct forwarding tunnel mark information is carried in the Handover Command message.

Concrete, if described source access network node is the RNC among the UTRAN, then the source access network node is by the re-positioning request in the described Inter-RAT switching preparation process (Relocation Required) message, and the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership;

If described source access network node is the base station among the EUTRAN, then the source access network node is by the handoff request Handover Required message in the described Inter-RAT switching preparation process, and the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership.

In this method, the source access network node is the RNC among the UTRAN, and the target access network node is the base station among the EUTRAN; Perhaps,

The source access network node is the base station among the EUTRAN, and the target access network node is the RNC among the UTRAN.

Referring to Fig. 8, the embodiment of the invention also provides a kind of tunnel information sending method, specifically may further comprise the steps:

Step 80: the target access network node receives the request message from the GTP tunnel routing information that obtains the target access network node of source access network node;

Step 81: the target access network node sends the GTP tunnel routing information of target access network node to the source access network node.

In the step 80, the direct forwarding tunnel information message transfer that described request message can be transmitted for the core net node of: target access network node ownership;

Accordingly, the target access network node is to the GTP tunnel routing information of source access network node transmission target access network node in the step 81, and its specific implementation can be as follows:

The target access network node sends the direct forwarding tunnel information message transfer of the GTP tunnel routing information that carries the target access network node by the core net node of self ownership and the core net node of source access network node ownership to the source access network node.

Preferable, when in described request message, carrying the GTP tunnel routing information of active access network node, the target access network node can carry out falling with the Packet Filtering from the source access network node of indicating this security gateway will not receive alternately according to IP address information in the GTP tunnel routing information of source access network node and security gateway; And/or,

The target access network node uses and directly transmits the tunnel to source access network node forwarding data according to the GTP tunnel routing information of source access network node.

Referring to Fig. 9, the embodiment of the invention also provides a kind of pass-through mode indicating means, specifically may further comprise the steps:

Step 90: the core net node of source access network node ownership receives and the direct tunnel of the target access network node that the source of preservation access network node sends can reach information;

Step 91: the Inter-RAT switching flow, core net node can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding the wireless access technology of terminal from the source access network node to the target access network node.

In the step 90, the core net node of source access network node ownership receives and the direct tunnel of the target access network node that the source of preservation access network node sends can reach information, and its specific implementation can be as follows:

The core net node of source access network node ownership is the Inter-RAT switching preparation process of terminal from the source access network node to the target access network node, and the direct tunnel of the target access network node that reception and the source of preservation access network node send can reach information; Perhaps,

The core net node of source access network node ownership is outside described Inter-RAT switching preparation process, and the direct tunnel of the target access network node that reception and the source of preservation access network node send can reach information.

Concrete, if described source access network node is the RNC among the UTRAN, then the core net node of source access network node ownership receives described direct tunnel and can reach information by the re-positioning request RelocationRequired message in the described Inter-RAT switching preparation process;

If described source access network node is the base station among the EUTRAN, then the core net node of source access network node ownership receives described direct tunnel and can reach information by the handoff request Handover Required message in the described Inter-RAT switching preparation process.

In the step 91, if described source access network node is the RNC among the general UTRAN, then core net node is by reorientation order (Relocation Command) message, and indication source access network node uses directly transmits the tunnel to the target access network node for data forwarding;

If described source access network node is the base station among the EUTRAN, then core net node is by switching command (Handover Command message), and indication source access network node uses directly transmits the tunnel to the target access network node for data forwarding.

Preferable, receive and after the direct tunnel of the target access network node that the source of preservation access network node sends can reach information at the core net node of source access network node ownership, the core net node of source access network node ownership can reach information with the direct tunnel of target access network node, send to the core net node of target access network node, the Inter-RAT switching preparation process of terminal, do not trigger the process of setting up in indirect forwarding tunnel with the core net node of indicating target access network node from the source access network node to the target access network node.

Concrete, the core net node of source access network node ownership can be in described Inter-RAT switching preparation process, and the direct tunnel of target access network node can be reached the core net node that information sends to the target access network node.

For example, the core net node of source access network node ownership is by commentaries on classics (Forward Relocation Request) message before the re-positioning request in the described Inter-RAT switching preparation process, and the direct tunnel of target access network node can be reached the core net node that information sends to the target access network node.

In this method, the source access network node is the RNC among the UTRAN, the target access network node is the base station among the EUTRAN, and the core net node of source access network node ownership is service universal grouping wireless business supporting node SGSN, and the core net node of target access network node ownership is MME; Perhaps,

The source access network node is the base station among the EUTRAN, and the target access network node is the RNC among the UTRAN, and the core net node of source access network node ownership is MME, and the core net node of target access network node ownership is SGSN.

The present invention will be described below in conjunction with specific embodiment:

Main thought of the present invention: in the prior art under the Inter-RAT handoff scenario, if it is that core net node must be known the information that whether has direct forwarding tunnel between source access network node that handoff procedure relates to and the target access network node that a necessary condition of direct tunnel pass-through mode is used in core net decision, for overcoming in the prior art under the Inter-RAT handoff scenario, the problem that the core net node amount of configuration data is big and the configuration data renewal is frequent, the present invention proposes the auxiliary core net of a kind of Access Network and judges between the Access Network node method that whether has " directly transmitting the tunnel ".

Wherein, embodiment 1 is the procurement process to target eNB user face transmission path address (IP address) that is triggered by UTRAN RNC, and wherein the target TAI information and the target eNB equipment identification information that carry of " directly transmitting tunnel information transmits " message of initiating of RNC is used for the route of equipment of the core network to target eNB.And source LAI information of carrying in " directly transmitting the tunnel information transmission " that RNC initiates and source RNC device identification will be used for " directly transmitting the tunnel information transmission " message that the follow-up structure of eNB eNB initiates, and be used for route as target LAI information and Target RNC device identification.Embodiment 2 is similar to embodiment 1 principle, and difference is that embodiment 2 is that EUTRAN eNB at first triggers.

Embodiment 3,4,5,6th, to the enhancing of " data forwarding " judgment mode in the switching flow in the prior art, and continued the principle that " data forwarding " mode is determined by source core net node in the switching flow in the prior art.

The embodiment of the invention is as follows:

Embodiment 1:UTRAN RNC is triggered to target EUTRAN eNB and sets up directly forwarding tunneling process, shown in Figure 10 A:

Step 1:RNC determines the target eNB list of devices according to RNC sub-district of having set up and adjacent EUTRAN cell list information.Here suppose that RNC is by automatic adjacent section discovery procedure or O﹠amp; The neighboring BS relationship with target EUTRAN sub-district is set up in the configuration of M.

Step 2:RNC sends " directly transmitting the tunnel information transmission " message and is the SGSN of its service, comprises following parameter in the message: the sub-district mark sign of EURTAN Target cell TAI information, target or the eNB device identification of management objectives sub-district, the GTP tunnel routing information of RNC, the device identification of source RNC, the RAI information of source RNC affiliated subdistrict.

Step 3:SGSN is according to the EURTAN Target cell TAI information of carrying in the step 2, determine target MME equipment, and transmission " directly transmitting tunnel information transmits " message comprises following parameter to target MME in the message: the sub-district mark sign of target or the eNB device identification of management objectives sub-district, the GTP tunnel routing information of RNC, the device identification of source RNC, the RAI information of source RNC affiliated subdistrict.

Step 4:MME is according to the sub-district mark sign of the target of carrying in the step 3 or the eNB device identification of management objectives sub-district, determine target eNB and send " directly transmitting the tunnel information transmission " message to give target eNB, comprise the GTP tunnel routing information of following parameter: RNC, the device identification of source RNC, the RAI information of source RNC affiliated subdistrict in the message.

On the one hand because the possibility of the EUTRAN network edge under target eNB deployment secure gateway, security gateway may be configured the source IP address of the IP packet that enters the EUTRAN network is checked, therefore target eNB need be according to the IP address information in the GTP tunnel routing information of source RNC in this case, by with the reciprocal process of EUTRAN security gateway, guarantee that the EUTRAN security gateway can will not fall from the IP Packet Filtering that sends over from source RNC.

On the other hand, under the situation of not considering security gateway, because it is two-way often that Inter-RAT switches, therefore follow-up very possible because need carry out data forwarding to RNC at eNB, therefore eNB also can lead to the GTP tunnel routing information of carrying preservation RNC in this step, is used for follow-up immediate data from eNB to RNC and transmits.

Step 5:eNB determines Target RNC according to the device identification of the source RNC that obtains in the step 4, the RAI information of source RNC affiliated subdistrict.ENB sends " directly transmitting the tunnel information transmission " message and gives MME, comprises the GTP tunnel routing information of following parameter: eNB, the device identification of Target RNC, the RAI information of Target RNC affiliated subdistrict, TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district in the message.

Step 6:MME determines target SGSN according to the RAI information of the Target RNC affiliated subdistrict that obtains in the step 5.MME sends " directly transmitting the tunnel information transmission " message and gives target SGSN, comprises the GTP tunnel routing information of following parameter: eNB, the device identification of Target RNC, TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district in the message.

Step 7:SGSN is according to the device identification of the Target RNC that obtains in the step 6, send " directly transmitting the tunnel information transmission " message and give Target RNC, comprise the GTP tunnel routing information of following parameter: eNB, TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district in the message.

Because RNC may be initiated to the procurement process of the direct forwarding tunnel information of a plurality of target eNB simultaneously, therefore the response message that comes from different e NB received of RNC may arrive simultaneously, so RNC need set up the related of the two with TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district according to the GTP tunnel routing information of the eNB in the message.

Step 8:RNC triggers user's face tunnel path and sets up process according to the GTP tunnel routing information of the target eNB that obtains in the step 7.

Embodiment 2:EUTRAN eNB is triggered to set up between target UTRAN RNC and directly transmits tunneling process, shown in Figure 10 B:

Step 1:eNB determines the Target RNC list of devices according to eNB sub-district of having set up and adjacent UTRAN cell list information.Here suppose that eNB by the automatic adjacent section discovery procedure, sets up the neighboring BS relationship with target UTRAN sub-district.

Step 2:eNB sends " directly transmitting the tunnel information transmission " message and gives MME, comprises the GTP tunnel routing information of following parameter: eNB, the device identification of Target RNC, the RAI information of Target RNC affiliated subdistrict, TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district in the message.

Step 3:MME determines target SGSN according to the RAI information of the Target RNC affiliated subdistrict that obtains in the step 2.MME sends " directly transmitting the tunnel information transmission " message and gives target SGSN, comprises the GTP tunnel routing information of following parameter: eNB, the device identification of Target RNC, TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district in the message.

Step 4:SGSN is according to the device identification of the Target RNC that obtains in the step 3, send " directly transmitting the tunnel information transmission " message and give Target RNC, comprise the GTP tunnel routing information of following parameter: eNB, TAI information, the facility information of source eNB or the cell ID of cell-of-origin of source eNB management sub-district in the message.

On the one hand because the possibility of the UTRAN network edge under Target RNC deployment secure gateway, security gateway may be configured the source IP address of the IP packet that enters the UTRAN network is checked, therefore Target RNC need be according to the IP address information in the GTP tunnel routing information of source eNB in this case, by with the reciprocal process of UTRAN security gateway, guarantee that the UTRAN security gateway can will not fall from the IP Packet Filtering that sends over from source eNB.

On the other hand, under the situation of not considering security gateway, because it is two-way often that Inter-RAT switches, therefore follow-up very possible because need carry out data forwarding to eNB at RNC, therefore RNC also can lead to the GTP tunnel routing information of carrying preservation eNB in this step, is used for follow-up immediate data from RNC to eNB and transmits.

Step 5:RNC determines target eNB according to the device identification of the source eNB that obtains in the step 4, the TAI information of source eNB affiliated subdistrict.RNC sends " directly transmitting the tunnel information transmission " message and gives SGSN, comprises following parameter in the message: the sub-district mark sign of EURTAN Target cell TAI information, target or the eNB device identification of management objectives sub-district, the GTP tunnel routing information of RNC, the device identification of source RNC, the RAI information of source RNC affiliated subdistrict.

Step 6:SGSN is according to the EURTAN Target cell TAI information of carrying in the step 5, determine target MME equipment and send " directly transmitting the tunnel information transmission " message to give target MME equipment, comprise following parameter in the message: the sub-district mark sign of target or the eNB device identification of management objectives sub-district, the GTP tunnel routing information of RNC, the device identification of source RNC, the RAI information of source RNC affiliated subdistrict.

Step 7:MME is according to the sub-district mark sign of the target of carrying in the step 6 or the eNB device identification of management objectives sub-district, determine target eNB and send " directly transmitting the tunnel information transmission " message to give target eNB, comprise the GTP tunnel routing information of following parameter: RNC, the device identification of source RNC, the RAI information of source RNC affiliated subdistrict.

Because eNB may be initiated to the procurement process of the direct forwarding tunnel information of a plurality of Target RNC simultaneously, therefore the response message that comes from different RNCs received of eNB may arrive simultaneously, so eNB need set up the related of the two according to GTP tunnel routing information and the device identification of source RNC, the RAI information of source RNC affiliated subdistrict to RNC in the message body.

Step 8:eNB triggers user's face tunnel path and sets up process according to the GTP tunnel routing information of the Target RNC that obtains in the step 7.

Embodiment 3:UTRAN is to the handoff procedure of EUTRAN (switch direct tunnel that UTRAN RNC in the set-up procedure will arrive target EUTRAN eNB and can reach information and send to SGSN, SGSN is transmitted to MME with above-mentioned indication information).Whether use " directly transmitting " mode in the prior art, judge decision by the target side core net node.Shown in Figure 10 C:

Step 1: according to embodiment 1, RNC is triggered to the process of setting up of the direct forwarding tunnel path of target eNB.

Step 2: the switching preparation process in the prior art from UTRAN to EUTRAN is referring to Fig. 3, for the present invention, in step 2 " Relocation Required " message of prior art, except the item of information that carries in the prior art, extra source RNC can reach source RNC at information to the direct tunnel of target eNB and send to SGSN, and SGSN gives MME with above-mentioned indication information by step 3 " Forward relocation request " forwards.MME judges according to the indication information of receiving in the step 3 can use direct tunnel pass-through mode, so the MME postorder can not trigger the indirect forwarding tunnel establishment procedure that step 6/ step 8 relates in the prior art.

Step 3: hand-off execution process is referring to Fig. 4, and according to the present invention, source RNC selects the mode of data by the forwarding of direct tunnel according to the indication of core net in the handoff procedure.

Embodiment 4:UTRAN is to the handoff procedure of EUTRAN (UTRAN RNC can reach self at information to the direct tunnel of target EUTRAN eNB in advance and send to SGSN, and SGSN is transmitted to MME with above-mentioned indication information).Shown in Figure 10 D:

Step 2: can reach under the situation that situation changes to the direct tunnel of target eNB or periodically at RNC, the RNC after RNC will upgrade can reach information to the direct forwarding tunnel of target eNB and send to core net node SGSN.

The local direct forwarding tunnel reachability information of preserving between RNC and the target eNB of step 3:SGSN.

Step 4: the switching preparation process in the prior art from UTRAN to EUTRAN is referring to Fig. 3, and the source RNC and the direct forward-path reachability information between the target eNB of SGSN local preservation are before given MME by step 3 " Forward relocation request " forwards.MME judges according to the indication information of receiving in the step 3 can use direct tunnel pass-through mode, so the MME postorder can not trigger the indirect forwarding tunnel establishment procedure that step 6/ step 8 relates in the prior art.

Step 5: hand-off execution process is referring to Fig. 4, and according to the present invention, the indication of source RNC core net will be selected the mode that data are transmitted by direct tunnel in the handoff procedure.

Embodiment 5:EUTRAN is to the handoff procedure of UTRAN (switch direct tunnel that EUTRAN eNB in the set-up procedure will arrive target EUTRAN eNB can reach information send to MME).Shown in Figure 10 E:

Step 1: according to embodiment 2, eNB is triggered to the process of setting up of the direct forwarding tunnel path of Target RNC.

Step 2: the switching preparation process in the prior art from EUTRAN to UTRAN is referring to Fig. 5, for the present invention, in step 2 " Handover Required " message of prior art, except the item of information that carries in the prior art, extra source eNB can reach source eNB at information to the direct tunnel of Target RNC and send to MME.MME gives SGSN with above-mentioned indication information by step 3 " Forward Relocation Request " forwards, SGSN judges according to above-mentioned information indication can use direct tunnel pass-through mode, so the SGSN postorder can not trigger the indirect forwarding tunnel establishment procedure that step 6/ step 8 relates in the prior art.

Step 3: hand-off execution process is referring to Fig. 6, and according to the present invention, source eNB selects the mode of data by the forwarding of direct tunnel according to the indication of core net in the handoff procedure.

Embodiment 6:EUTRAN is to the handoff procedure (EUTRAN eNB can reach self at the MME that sends to of property information cycle to the direct tunnel of target UTRAN RNC) of UTRAN.Shown in Figure 10 F:

Step 2: can reach under the situation that situation changes to the direct tunnel of Target RNC or periodically, the eNB after eNB will upgrade sends to core net node MME to the direct forwarding tunnel reachability information of Target RNC at eNB.

The local direct forwarding tunnel reachability information of preserving between eNB and the Target RNC of step 3:MME.

Step 4: the switching preparation process in the prior art from EUTRAN to UTRAN is referring to Fig. 5, the source eNB and the direct forward-path reachability information between the Target RNC of MME local preservation are before given SGSN by step 3 " Forward Relocation Request " forwards, SGSN judges according to above-mentioned information indication can use direct tunnel pass-through mode, so the SGSN postorder can not trigger the indirect forwarding tunnel establishment procedure that step 6/ step 8 relates in the prior art.

Step 5: hand-off execution process is referring to Fig. 6, and according to the present invention, source eNB will select the mode of data by the forwarding of direct tunnel according to the indication of core net in the handoff procedure.

Referring to Figure 11, the embodiment of the invention also provides a kind of wireless communication system, and this system comprises:

Source access network node 110 is used for determining the target access network node, and the target access network node uses different wireless access technology RAT with the source access network node; Send the request message of the GTP tunnel routing information that obtains the target access network node to the target access network node; According to the GTP tunnel routing information that gets access to, be initiated to the process of setting up in the direct forwarding tunnel of target access network node;

Target access network node 111 is used to receive described request message, sends the GTP tunnel routing information of target access network node to the source access network node.

This system also comprises:

The core net node of source access network node ownership, promptly the source core net node 112, and the direct tunnel that is used to receive and preserve the target access network node that the source access network node sends can reach information; The wireless access technology of terminal, the Inter-RAT switching flow, can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding from the source access network node to the target access network node.

This system also comprises:

The core net node of target access network node, it is target core network node 113, the direct tunnel that is used for the target access network node that the core net node of reception sources access network node ownership sends can reach information, the Inter-RAT switching preparation process of terminal, can reach information according to this direct tunnel and judge the process of setting up that does not trigger indirect forwarding tunnel from the source access network node to the target access network node.

Referring to Figure 12, the embodiment of the invention also provides the apparatus for establishing in a kind of direct forwarding tunnel, and this equipment comprises:

Determining unit 120 is used for determining the target access network node, and the target access network node uses different wireless access technology RAT with the source access network node;

Acquiring unit 121 is used for sending to the target access network node request message of the GTP tunnel routing information obtain the target access network node;

Set up unit 122, be used for being initiated to the process of setting up in the direct forwarding tunnel of target access network node according to the GTP tunnel routing information that gets access to.

Described determining unit 120 is used for:

According to adjacent cell relation information, determine adjacent with the sub-district of source access network node management and with the sub-district that the origin access network node uses different RAT, the access network node of managing this sub-district is defined as the target access network node.

Described acquiring unit 121 is used for:

By the core net node of self ownership and the core net node of target access network node ownership, send directly forwarding tunnel information message transfer to the target access network node, the GTP tunnel routing information of target access network node is returned to the source access network node with the request target access network node.

Also carry the GTP tunnel routing information of active access network node in the described direct forwarding tunnel information message transfer.

This equipment also comprises:

Retransmission unit 123 is used for after getting access to the GTP tunnel routing information, and the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership;

The wireless access technology of terminal, the Inter-RAT switching flow, select to use described direct forwarding tunnel according to the indication of core net node, to the target access network node for data forwarding from the source access network node to the target access network node.

Described retransmission unit 123 is used for:

The Inter-RAT switching preparation process of terminal, the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership from the source access network node to the target access network node; Perhaps,

In the time of can reaching situation according to the predefined time cycle or in direct tunnel and change, the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership to the target access network node.

If described source access network node is the radio network controller (RNC) among the universal land radio access web UTRAN, then the indication of core net node is carried in the reorientation order Relocation Command message;

If described source access network node is the base station among the universal land radio access web EUTRAN of evolution, then the indication of core net node is carried in the switching command Handover Command message.

Described retransmission unit 123 is used for:

If described source access network node is the RNC among the UTRAN, then by the re-positioning request Relocation Required message in the described Inter-RAT switching preparation process, the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership;

If described source access network node is the base station among the EUTRAN, then by the handoff request Handover Required message in the described Inter-RAT switching preparation process, the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership.

The source access network node is the RNC among the UTRAN, and the target access network node is the base station among the EUTRAN; Perhaps,

Referring to Figure 13, the embodiment of the invention also provides a kind of tunnel information transmitting apparatus, and this equipment comprises:

Receiving element 130 is used to receive the request message from the GTP tunnel routing information that obtains the target access network node of source access network node;

Transmitting element 131 is used for the GTP tunnel routing information to source access network node transmission target access network node.

Described transmitting element 131 is used for:

In described request message be: during direct forwarding tunnel information message transfer that the core net node of target access network node ownership is transmitted, by the core net node of self ownership and the core net node of source access network node ownership, send the direct forwarding tunnel information message transfer of the GTP tunnel routing information that carries the target access network node to the source access network node.

This equipment also comprises:

Applying unit 132, be used for when described request message is carried the GTP tunnel routing information of active access network node, carry out falling with the Packet Filtering from the source access network node of indicating this security gateway will not receive alternately according to IP address information in the GTP tunnel routing information of source access network node and security gateway; And/or,

According to the GTP tunnel routing information of source access network node, use and directly transmit the tunnel to source access network node forwarding data.

Referring to Figure 14, the embodiment of the invention also provides a kind of pass-through mode indicating equipment, and this equipment comprises:

Receiving element 140, the direct tunnel that is used to receive and preserve the target access network node that the source access network node sends can reach information;

Indicating member 141, be used in terminal Inter-RAT switching flow wireless access technology, can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding from the source access network node to the target access network node.

Described receiving element 140 is used for:

The Inter-RAT switching preparation process of terminal from the source access network node to the target access network node, the direct tunnel of the target access network node that reception and the source of preservation access network node send can reach information; Perhaps,

Outside described Inter-RAT switching preparation process, the direct tunnel of the target access network node that reception and the source of preservation access network node send can reach information.

Described indicating member 141 is used for:

If described source access network node is the radio network controller (RNC) among the universal land radio access web UTRAN, then by reorientation order Relocation Command message, indication source access network node uses directly transmits the tunnel to the target access network node for data forwarding;

If described source access network node is the base station among the universal land radio access web EUTRAN of evolution, then by switching command Handover Command message, indication source access network node uses directly the forwarding tunnel to the target access network node for data forwarding.

Described receiving element 140 is used for:

If described source access network node is the RNC among the UTRAN,, receives described direct tunnel and can reach information then by the re-positioning request Relocation Required message in the described Inter-RAT switching preparation process;

If described source access network node is the base station among the EUTRAN,, receives described direct tunnel and can reach information then by the handoff request Handover Required message in the described Inter-RAT switching preparation process.

This equipment also comprises:

Transmitting element 142, be used for the direct tunnel of target access network node can be reached information, send to the core net node of target access network node, the Inter-RAT switching preparation process of terminal, do not trigger the process of setting up in indirect forwarding tunnel with the core net node of indicating target access network node from the source access network node to the target access network node.

Described transmitting element 142 is used for:

In described Inter-RAT switching preparation process, the direct tunnel of target access network node can be reached the core net node that information sends to the target access network node.

Described transmitting element 142 is used for:

By changeing Forward RelocationRequest message before the re-positioning request in the described Inter-RAT switching preparation process, the direct tunnel of target access network node can be reached the core net node that information sends to the target access network node.

The source access network node is the RNC among the UTRAN, and the target access network node is the base station among the EUTRAN, and the core net node of source access network node ownership is service universal grouping wireless business supporting node SGSN, and the core net node of target access network node ownership is MME; Perhaps,

To sum up, beneficial effect of the present invention comprises:

In the scheme that the embodiment of the invention provides, after the source access network node is determined to use the target access network node of different RAT, send the request message of the GTP tunnel routing information that obtains the target access network node to the target access network node, and, be initiated to the process of setting up in the direct forwarding tunnel of target access network node according to the GTP tunnel routing information that gets access to.As seen, in this programme, be triggered to the process of setting up in the direct forwarding tunnel of target access network node by the source access network node, and do not need in advance at equipment of the core network configuration and the source of maintenance access network node to effectively reduce the data configuration amount at equipment of the core network to the direct forwarding tunnel reachability information of target access network node.The present invention compared with prior art provides greater flexibility, and has eliminated the data configuration work to core net node, has reduced the implementation complexity of core net node, has improved system effectiveness.

The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. method for building up of directly transmitting the tunnel is characterized in that this method comprises:

The source access network node sends the request message of the general packet wireless service tunnel protocol GTP tunnel routing information that obtains the target access network node to the target access network node;

2. the method for claim 1 is characterized in that, described source access network node determines that the target access network node comprises:

3. the method for claim 1 is characterized in that, the described request message that sends the GTP tunnel routing information obtain the target access network node to the target access network node comprises:

4. method as claimed in claim 3 is characterized in that, carries the GTP tunnel routing information of active access network node in the described direct forwarding tunnel information message transfer.

5. the method for claim 1 is characterized in that, after the source access network node got access to the GTP tunnel routing information, this method further comprised:

The source access network node can reach the direct tunnel of target access network node at the core net node that information sends to source access network node ownership;

The source access network node the Inter-RAT switching flow, is selected to use described direct forwarding tunnel according to the indication of core net node, to the target access network node for data forwarding the wireless access technology of terminal from the source access network node to the target access network node.

6. method as claimed in claim 5 is characterized in that, described source access network node can reach the direct tunnel of target access network node at the core net node that information sends to source access network node ownership and comprise:

7. method as claimed in claim 5, it is characterized in that, if described source access network node is the radio network controller (RNC) among the universal land radio access web UTRAN, then the indication of described core net node is carried in the reorientation order Relocation Command message;

If described source access network node is the base station among the universal land radio access web EUTRAN of evolution, then the indication of described core net node is carried in the switching command Handover Command message.

8. method as claimed in claim 6, it is characterized in that, if described source access network node is the RNC among the UTRAN, then the source access network node is by the re-positioning request Relocation Required message in the described Inter-RAT switching preparation process, and the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership;

9. as arbitrary described method among the claim 1-6, it is characterized in that the source access network node is the RNC among the UTRAN, the target access network node is the base station among the EUTRAN; Perhaps,

10. a tunnel information sending method is characterized in that, this method comprises:

The target access network node receives the request message from the general packet wireless service tunnel protocol GTP tunnel routing information that obtains the target access network node of source access network node;

11. method as claimed in claim 10 is characterized in that, described request message is: the direct forwarding tunnel information message transfer that the core net node of target access network node ownership is transmitted;

Described target access network node comprises to the GTP tunnel routing information that the source access network node sends the target access network node:

12. method as claimed in claim 10 is characterized in that, when carrying the GTP tunnel routing information of active access network node in described request message, this method further comprises:

The target access network node carries out falling with the Packet Filtering from the source access network node of indicating this security gateway will not receive alternately according to IP address information in the GTP tunnel routing information of source access network node and security gateway; And/or,

13., it is characterized in that the source access network node is the RNC among the UTRAN as arbitrary described method among the claim 10-12, the target access network node is the base station among the EUTRAN; Perhaps,

14. a pass-through mode indicating means is characterized in that, this method comprises:

15. method as claimed in claim 14, it is characterized in that, the core net node of source access network node ownership is the Inter-RAT switching preparation process of terminal from the source access network node to the target access network node, and the direct tunnel of the target access network node that reception and the source of preservation access network node send can reach information; Perhaps,

16. method as claimed in claim 14, it is characterized in that, if described source access network node is the radio network controller (RNC) among the universal land radio access web UTRAN, then core net node is by reorientation order Relocation Command message, and indication source access network node uses directly transmits the tunnel to the target access network node for data forwarding;

If described source access network node is the base station among the universal land radio access web EUTRAN of evolution, then core net node is by switching command Handover Command message, and indication source access network node uses directly transmits the tunnel to the target access network node for data forwarding.

17. method as claimed in claim 15, it is characterized in that, if described source access network node is the RNC among the UTRAN, then the core net node of source access network node ownership receives described direct tunnel and can reach information by the re-positioning request Relocation Required message in the described Inter-RAT switching preparation process;

18. method as claimed in claim 14 is characterized in that, receives and after the direct tunnel of the target access network node that the source of preservation access network node sends can reach information, this method further comprised at the core net node of source access network node ownership;

The core net node of source access network node ownership can reach the direct tunnel of target access network node at information, send to the core net node of target access network node, the Inter-RAT switching preparation process of terminal, do not trigger the process of setting up in indirect forwarding tunnel with the core net node of indicating target access network node from the source access network node to the target access network node.

19. method as claimed in claim 18, it is characterized in that, the core net node of source access network node ownership can reach the direct tunnel of target access network node at the core net node that information sends to the target access network node in described Inter-RAT switching preparation process.

20. method as claimed in claim 19, it is characterized in that, the core net node of source access network node ownership is by commentaries on classics ForwardRelocation Request message before the re-positioning request in the described Inter-RAT switching preparation process, and the direct tunnel of target access network node can be reached the core net node that information sends to the target access network node.

21., it is characterized in that the source access network node is the RNC among the UTRAN as arbitrary described method among the claim 14-15, the target access network node is the base station among the EUTRAN, the core net node of source access network node ownership is SGSN; Perhaps,

The source access network node is the base station among the EUTRAN, and the target access network node is the RNC among the UTRAN, and the core net node of source access network node ownership is a mobile management entity MME.

22. as arbitrary described method among the claim 18-20, it is characterized in that, the source access network node is the RNC among the UTRAN, the target access network node is the base station among the EUTRAN, the core net node of source access network node ownership is service universal grouping wireless business supporting node SGSN, and the core net node of target access network node ownership is MME; Perhaps,

23. an apparatus for establishing of directly transmitting the tunnel is characterized in that this equipment comprises:

24. equipment as claimed in claim 23 is characterized in that, described determining unit specifically is used for:

25. equipment as claimed in claim 23 is characterized in that, described acquiring unit specifically is used for:

26. equipment as claimed in claim 25 is characterized in that, carries the GTP tunnel routing information of active access network node in the described direct forwarding tunnel information message transfer.

27. equipment as claimed in claim 23 is characterized in that, this equipment also comprises:

Retransmission unit is used for after getting access to the GTP tunnel routing information, and the direct tunnel of target access network node can be reached the core net node that information sends to source access network node ownership;

28. equipment as claimed in claim 27 is characterized in that, described retransmission unit specifically is used for:

29., it is characterized in that the source access network node is the RNC among the UTRAN as arbitrary described equipment among the claim 23-28, the target access network node is the base station among the EUTRAN; Perhaps,

30. a tunnel information transmitting apparatus is characterized in that, this equipment comprises:

31. equipment as claimed in claim 30 is characterized in that, described transmitting element specifically is used for:

32. equipment as claimed in claim 30 is characterized in that, this equipment also comprises:

Applying unit, be used for when described request message is carried the GTP tunnel routing information of active access network node, carry out falling with the Packet Filtering from the source access network node of indicating this security gateway will not receive alternately according to IP address information in the GTP tunnel routing information of source access network node and security gateway; And/or,

33., it is characterized in that the source access network node is the RNC among the UTRAN as arbitrary described equipment among the claim 30-32, the target access network node is the base station among the EUTRAN; Perhaps,

34. a pass-through mode indicating equipment is characterized in that, this equipment comprises:

35. equipment as claimed in claim 34 is characterized in that, described receiving element specifically is used for:

36. equipment as claimed in claim 34 is characterized in that, this equipment also comprises:

Transmitting element, be used for the direct tunnel of target access network node can be reached information, send to the core net node of target access network node, the Inter-RAT switching preparation process of terminal, do not trigger the process of setting up in indirect forwarding tunnel with the core net node of indicating target access network node from the source access network node to the target access network node.

37. equipment as claimed in claim 36 is characterized in that, described transmitting element specifically is used for:

38., it is characterized in that the source access network node is the RNC among the UTRAN as arbitrary described equipment among the claim 34-35, the target access network node is the base station among the EUTRAN, the core net node of source access network node ownership is SGSN; Perhaps,

39. as arbitrary described equipment among the claim 36-37, it is characterized in that, the source access network node is the RNC among the UTRAN, the target access network node is the base station among the EUTRAN, the core net node of source access network node ownership is service universal grouping wireless business supporting node SGSN, and the core net node of target access network node ownership is MME; Perhaps,

40. a wireless communication system is characterized in that, this system comprises:

41. system as claimed in claim 40 is characterized in that, this system also comprises:

The core net node of source access network node ownership, the direct tunnel that is used to receive and preserve the target access network node that the source access network node sends can reach information; The wireless access technology of terminal, the Inter-RAT switching flow, can reach information indication source access network node according to described direct tunnel and use the direct tunnel of transmitting to the target access network node for data forwarding from the source access network node to the target access network node.

42. system as claimed in claim 41 is characterized in that, this system also comprises:

The core net node of target access network node, the direct tunnel that is used for the target access network node that the core net node of reception sources access network node ownership sends can reach information, the Inter-RAT switching preparation process of terminal, can reach information according to this direct tunnel and judge the process of setting up that does not trigger indirect forwarding tunnel from the source access network node to the target access network node.