CN101218764B

CN101218764B - Handover method and apparatus between different systems

Info

Publication number: CN101218764B
Application number: CN2006800246503A
Authority: CN
Inventors: 郭鲁濬; 崔成豪; 金成勋; 郑景仁; 裵恩希; 林娴娜; 宋晤硕
Original assignee: Samsung Electronics Co Ltd
Current assignee: Nokia Technologies Oy
Priority date: 2005-07-07
Filing date: 2006-07-07
Publication date: 2011-09-14
Anticipated expiration: 2026-07-07
Also published as: BRPI0612766A2; RU2007149346A; CN101218764A; KR101042763B1; JP4886079B2; JP2008547353A; JP2011151828A; KR20070006539A; RU2367094C1; CN102056259A; CN102056259B

Abstract

A method and apparatus performs handover from a E-UMTS system to a UMTS system. An E-RAN of the E-UMTS system determines to perform the handove based on a measured signal strength of the UMTS system reported from a UE. Then, am E-CN of the E-UMTS system generates a PDP context and an MM context for the UE, and sets up a data tunnel for the UE to a GGSN of the UMTS system using the PDP/MM context. The E-CN sends to the UE a handover command message including information on an RB to be used by the UE to access the UMTS system. The UE accesses the UMTS system using the RB information, and forwards user data for the UE via a data transmission path composed of the E-CN, the data tunnel, a SGSN, and a RAN of the UMTS system.

Description

Changing method between the different system and equipment

Technical field

The present invention relates generally to the switching between the different system.More specifically, but not restrictedly, the present invention relates to a kind of method and apparatus that is used between tradition (legacy) universal mobile telecommunications service (UMTS) system and reinforcement UMTS (E-UMTS) system, providing switching.

Background technology

Universal mobile telecommunications service (UMTS) system is based on the third generation asynchronous mobile communiation system of Global Systems for Mobile communications (GSM) and General Packet Radio Service System (GPRS).UMTS system use Wideband Code Division Multiple Access (WCDMA) (CDMA) is as wireless access technology (RAT) and relevant service is provided, and wherein the user of mobile phone or computer can send packet-based text, digitized audio/video and multi-medium data with 2Mbps speed or higher rate in the world Anywhere.The UMTS system adopt to use packet oriented protocol such as Internet protocol (IP) be called virtual access notion that packet switching inserts and always can access network in any terminal.

Fig. 1 has illustrated the configuration of traditional UMTS system.

With reference to figure 1, subscriber equipment (UE) 110 is meant terminal equipment or the user who participates in radio communication, and wireless connections are in Node B 120.Node B 120 is used to participate in directly the wireless base station transceiver that communicates with UE 110, manages the sub-district relevant with it.Radio network controller (RNC) the 130 a plurality of Node B of control also need to determine whether to switch.Connection between RNC 130 and the UE 110 is finished by Radio Resource control (RRC) interface.

RNC 130 is connected to packet switching or Packet Service (PS) network, for example internet by Serving GPRS Support Node (SGSN) 140.Communicating by letter between RNC 130 and the PS network finished by packet switching signaling (PS signaling).Connection between RNC 130 and the SGSN 140 is called as " Iu-PS interface ".SGSN140 control offers each user's business.Especially, each user's of SGSN 140 management service billing related data, and the data that exchange of transmissions/receptions and UE 110 optionally of the Serving RNC (SRNC) 130 by the corresponding UE 110 of management.

Gateway GPRS Support Node (GGSN) 150 is as gateway node, and the UE 110 that receives Packet Service is given in this network node distributing IP address, and UE 110 is connected to external packet data network (PDN) 160.

As shown in Figure 1, the combination of Node B 120 and RNC 130 is called as Radio Access Network (RAN) 170, and the combination of SGSN 140 and GGSN 150 is called as core network (CN) 180.Each SGSN 140 and each GGSN 150 are called as the CN node.

Improved E-UMTS system of UMTS system from based on CDMA has utilized orthogonal frequency division modulated (OFDM), and has reduced the network node number that UE need be connected to PDN.This helps rapid data transmission.

Fig. 2 has illustrated the exemplary configuration of E-UMTS system.

With reference to figure 2, UE 210 expression terminal equipment or users.Improve RAN (E-RAN) 240 as Node B 120 and RNC 130 in traditional UMTS system.In E-RAN 240, with the same in traditional UMTS system, the function of E-Node B 220 and E-RNC 230 can be by physical isolation at different nodes.Alternatively, the function of E-Node B 220 and E-RNC 230 can be integrated in the entity node.E-CN 250, and the combined joint of SGSN 140 and GGSN 150 is placed between PDN 260 and the E-RAN 240 in traditional UMTS system.E-CN 250 is as being used for the gateway node that the distributing IP address is given UE 210 and is used for UE 210 is connected to PDN 260.

The coverage of tradition UMTS system and E-UMTS system may overlap.In this coincidence zone (being also known as Zone switched), can must between this two system, carry out switching from the bimodulus UE of traditional UMTS system and E-UMTS system received signal.In order to provide service by the E-UMTS system to the user, the service provider need be in the hand-off process between traditional UMTS system and the E-UMTS system.

Therefore, need be convenient in traditional common mobile communication business (UMTS) system and strengthen the improvement system and method that switches between UMTS (E-UMTS) system.

Summary of the invention

Technical problem

The objective of the invention is to propose at least one the problems referred to above and/or shortcoming and following at least advantage is provided.Correspondingly, an object of the present invention is to provide method and apparatus, wherein the UE in data communication carries out the switching from the E-UMTS system to traditional UMTS system.

One exemplary embodiment of the present invention provide method and apparatus, and wherein the UE in data communication carries out the switching from traditional UMTS system to the E-UMTS system.

Exemplary embodiment of the present invention provides the method and apparatus of setting up the tunnel between a kind of CN that is used in the E-CN of E-UMTS system and traditional UMTS system.Exemplary embodiment of the present invention also provides packet data service to carry out the UE that switches between E-UMTS system and traditional UMTS system.

Technical scheme

According to an aspect of exemplary embodiment of the present invention, provide a kind of be used for carrying out from based on reinforcement universal mobile telecommunications service (E-UMTS) system of OFDM modulation (OFDM) to method based on the switching of the UMTS system of code division multiple access (CDMA).Subscriber equipment (UE) by E-UMTS and packet data network (PDN) measure the signal strength signal intensity of UMTS system in communicating.Indicate the measurement report message of measured signal strength signal intensity to be sent to the E-UMTS system.The wireless access network of E-UMTS system (E-RAN) determines whether to carry out switching from the E-UMTS system to the UMTS system based on measured signal strength signal intensity.If determine to switch, the core network of E-UMTS system (CN) set up UE to the data tunnel of gateway GPRS (GPRS) support node (GGSN) of UMTS system to respond the handoff request of E-RAN.After setting up this data tunnel, E-CN sends switching command message to UE.This switching command message comprises radio bearer (RB) information that relevant UE is used for inserting the UMTS system.UE uses this RB information to insert the UMTS system.After being linked into the UMTS system, Serving GPRS Support Node (SGSN) and the data transfer path of the RAN of the UMTS system user data that PDN and UE between transmit UE of UE by comprising E-CN, data tunnel, GGSN, UMTS system.

According to another aspect of exemplary embodiment of the present invention, provide a kind of be used for carrying out from based on reinforcement universal mobile telecommunications service (E-UMTS) system of OFDM modulation (OFDM) to method based on the switching of the UMTS system of code division multiple access (CDMA).Subscriber equipment (UE) by E-UMTS and packet data network (PDN) measure the signal strength signal intensity of UMTS system in communicating, and the measurement report message of intensity that sends the measured signal of indication is to the E-UMTS system.The wireless access network of E-UMTS system (E-RAN) determines whether to carry out switching from the E-UMTS system to the UMTS system based on measured signal strength signal intensity.If determine to switch, then the core network of E-UMTS system (E-CN) produces for user's packet data protocol (PDP) context and mobile management (MM) the context handoff request with response E-RAN.E-CN uses this PDP/MM context to set up the data tunnel of UE to gateway GPRS (GPRS) support node (GGSN) of UMTS system.After setting up this data tunnel, E-CN sends switching command message to UE.This switching command message comprises that relevant UE is used for inserting the radio bearer of UMTS system (RB) information.UE use this RB information insert UMTS system and subsequently the data transfer path of the RAN by comprising E-CN, data tunnel, GGSN, Serving GPRS Support Node (SGSN) and UMTS system between PDN and UE, transmit the user data of UE.

More enter an aspect according to an exemplary embodiment of the present invention, provide a kind of be used for carrying out from based on reinforcement universal mobile telecommunications service (E-UMTS) system of OFDM modulation (OFDM) to device for switching based on the UMTS system of code division multiple access (CDMA).This device comprises the Radio Access Network (E-RAN) of E-UMTS system, and this E-UMTS system receives the measurement report message of indication subscriber equipment measured UMTS system signal intensity in communicating by E-UMTS system and packet data network (PDN).The E-RAN of E-UMTS system also determines whether to carry out the switching of E-UMTS to the UMTS system based on measured signal strength signal intensity.If determine to switch, the core network of E-UMTS system (CN) produces for packet data protocol (PDP) context of UE and mobile management (MM) the context handoff request with response E-RAN.The E-CN of E-UMTS system also uses the data tunnel of this PDP/MM context foundation for UE.After setting up data tunnel, send the switching command message comprise radio bearer (RB) information that relevant UE is used for inserting the UMTS system to UE.In response after this switching command message is linked into the UMTS system, the data transfer path of the RAN of UE by comprising E-CN, data tunnel, GGSN, Serving GPRS Support Node (SGSN) and UMTS system transmits the user data of UE between PDN and UE.

According to an exemplary embodiment of the present invention on the other hand, provide a kind of equipment UE that is used for to carry out the method for switching to reinforcement UMTS (E-UMTS) system of modulating (OFDM) based on OFDM from based on universal mobile telecommunications service (UMTS) system of code division multiple access (CDMA).UE measures the signal strength signal intensity of E-UMTS system in the process that communicates by E-UMTS system and packet data network (PDU), and sends the measurement report message of the measured signal strength signal intensity of indication to the UMTS system.The Radio Access Network of UMTS system (RAN) determines whether to carry out switching from the UMTS system to the E-UMTS system based on measured signal strength signal intensity.After determining switching, RAN will be from service GPRS (GPRS) support node (SGSN) that request message sends to the UMTS system of redistributing of source radio network controller (RNC) reception.SGSN transmission forward direction is redistributed message and is redistributed request message to the core network (E-CN) of E-UMTS system with response.E-CN is the Data-carrying and the data tunnel of gateway GPRS (GPRS) support node (GGSN) of the UE Radio Access Network (E-RAN) that is established to the E-UMTS system and UMTS system.After setting up data tunnel, SGSN sends the request of command messages with response E-CN of redistributing by RAN to UE.UE redistributes command messages and is linked into the E-UMTS system in response to this.

Others of the present invention, advantage and remarkable characteristic will become clear by the following detailed description of coming to disclose exemplary embodiment of the present invention in conjunction with the accompanying drawings for those skilled in the art.

The advantage influence

Exemplary embodiment of the present invention is provided at the switching between the different system in the wireless environment.Exemplary embodiment of the present invention can be finished UE and move to the switching of traditional UMTS system from the E-UMTS system, and vice versa.The old IP address that can use old system to distribute in the handoff procedure of UE between E-UMTS system and traditional UMTS system.This has just been avoided existing SGSN, the needs that RNC and Node B make amendment.

When the reference certain exemplary embodiments illustrates when of the present invention, those skilled in the art are to be understood that the different changes of form and details do not break away from appended claims and the defined the spirit and scope of the present invention of their equivalent.

Description of drawings

Above-mentioned and other illustrative aspects, characteristic and the advantage of certain exemplary embodiments of the present invention will become clear in conjunction with the drawings, wherein:

Fig. 1 is the schematic diagram that conventional UMTS system is provided with.

Fig. 2 is the schematic diagram that the routine of E-UMTS system is provided with.

Fig. 3 illustrates that according to an exemplary embodiment of the present node participates in the schematic diagram of the handoff procedure from the E-UMTS system to traditional UMTS system.

Fig. 4 is the message flow chart according to the hand-off process of first exemplary embodiment of the present invention.

Fig. 5 is the message flow chart according to the hand-off process of second exemplary embodiment of the present invention.

Fig. 6 is the block diagram according to the UE structure of first and second exemplary embodiments of the present invention.

Fig. 7 is the flow chart according to the UE operation of first and second exemplary embodiments of the present invention.

Fig. 8 is the block diagram according to the structure of the E-RAN of first and second exemplary embodiments of the present invention.

Fig. 9 is the flow chart according to the operation of the E-RAN of first and second exemplary embodiments of the present invention.

Figure 10 is the block diagram according to the structure of the E-CN of first and second exemplary embodiments of the present invention.

Figure 11 is the flow chart according to the operation of the E-CN of first exemplary embodiment of the present invention.

Figure 12 is the flow chart according to the operation of the E-CN of second exemplary embodiment of the present invention.

Figure 13 is the block diagram according to the structure of the GGSN of preferred illustrative embodiment of the present invention.

Figure 14 is the flow chart according to the operation of the GGSN of first exemplary embodiment of the present invention.

Figure 15 is the message flow chart according to the hand-off process of the 3rd exemplary embodiment of the present invention.

In these accompanying drawings, identical Reference numeral is understood that to represent components identical, characteristic and structure.

Embodiment

The defined content of specification is understood embodiments of the invention as detailed structure and element is provided with help.Correspondingly, those skilled in the art will recognize that the various changes of embodiment as described herein and revise do not depart from the scope of the present invention and spirit.And, with simple and clear, will known function and structure be described for simplicity.

Fig. 3 has illustrated that node according to an exemplary embodiment of the present participates in the handoff procedure between E-UMTS system and the traditional UMTS system.

With reference to figure 3, for example, UE 310, and it is connected in the E-UMTS system 370 and receives from PDN390 such as service that IP network provided, moves now and is linked into UMTS system 370 therefrom to receive service.UE 310 moves to UMTS system 380 from E-UMTS system 370 in Zone switched, in Zone switched UE can be from E-UMTS system 370 and UMTS system 380 received signal.For example, the forward/reverse transmission path that is used for grouped data after switching changes to new path UE (310)-RNC (340)-SGSN (350)-GGSN (360)-PDN (390) or to another new path UE (310)-RNC (340)-SGSN (350)-E-CN (330)-PDN (390) from old path UE (310)-E-RAN (320)-E-CN (330)-PDN (390).

As another example, UE 310, and it is connected to UMTS system 380 and the service that provides from PDN 390 is provided, and move now to be linked into E-UMTS system 370 therefrom to receive service.Here, UE310 moves to E-UMTS system 370 Zone switched from UMTS system 380, wherein in Zone switched UE can be from E-UMTS system 370 and UMTS system 380 received signal.According to illustrative embodiments, the forward/reverse transmission path that is used for grouped data after the switching changes to new route UE (310)-E-RAN (320)-E-CN (330)-PDN (390) from old path UE (310)-RNC (340)-SGSN (350)-GGSN (360)-PDN (390).

In Fig. 3, RNC 340 in the UMTS system 380 and the Node B between the UE 310, and the operation of Node B between E-RAN in the E-UMTS system 370 320 and the UE 310 and exemplary embodiment of the present is not closely-related.In order to be beneficial to different types of switching, E-CN 330 can have

connection

365 and 355 between GGSN 360 and SGSN 350.

First exemplary embodiment of the present invention between E-CN 330 and GGSN 360, set up the tunnel and by this tunnel transmission user data so that UE 310 even after switching, can use oneself old IP address.According to first exemplary embodiment of the present invention, the data transfer path among Fig. 3 is PDN (390)-E-CN (330)-GGSN (360)-SGSN (350)-RNC (340)-UE (310) after switching.By making full use of the message for service radio network system (SRNS) re-allocation process between the SGSN that defines in traditional UMTS system, signaling can the advantageously switching between back-up system under the situation of SGSN and the RNC of traditional UMTS system not made amendment between the node that is used to switch.

Fig. 4 has illustrated the hand-off process according to first exemplary embodiment of the present invention.Here, the prefix " s " and " t " that link to each other with each namespace node indicate source and target respectively.

With reference to figure 4, in step 410, the UE 401 that is connected to the E-UMTS system measures the quality information as the received power stage of UMTS system or received signal strength signal intensity.UE 401 sends the measurement report message of the quality information that comprises the UMTS system to E-RAN 402.In step 411, E-RAN 402 determines whether to carry out the switching between RAT.Determine to carry out switch between RAT after, E-RAN 402 sends to E-CN 403 and switches the message that needs in step 412.The message that this switching needs comprises that the SRNS that is used in traditional UMTS system redistributes " source RNC is to the transparent vessel of Target RNC " and the expectation target sub-district ID in the processing.That is to say that E-RAN 402 configurations are somebody's turn to do " source RNC (402) is to the transparent vessel of Target RNC (406) " so that Target RNC 406 is appreciated that its implication.

Transparent vessel is used for redistributing between SGSN.Even transparent vessel is sent to Target RNC by core network from source RNC, core network is not opened this container yet and is checked its content.Following information is included in this " source RNC is to transparent vessel of Target RNC ": the number of RRC container, Iu interface (for example, " 1 " expression Iu-PS), redistribute integrity protection/encryption, Target cell ID, trace recording conversation information and multimedia broadcast/multi broadcast business (MBMS) link information of type (being set to usually comprise UE's), form.The RRC message that is provided by UE 401, for example measurement report message can be provided the RRC container.

In step 413, E-CN 403 turns round as a virtual SGSN by the function of imitating SGSN, and sends HO request message between RAT to GGSN 404.In step 414, E-CN 403 receives between RAT the HO response message with as its response.The HO request message comprises and comprises as the block data protocol context of the business/user profile of IP address and distribute to the Quality of Service grade of UE 401 in the E-UMTS system between RAT, and a UE-id.In addition, the HO requests/response messages comprises the GGSN address that is used for setting up user's face (UP) data tunnel between E-CN 403 and GGSN 404 between RAT.In step 415, between E-CN 403 and GGSN 404, set up the tunnel by the information of exchange in step 413 and 414.If E-CN 403 has predicted this GGSN 404 (for example, having only a GGSN in the system), step 413 and 414 can be omitted.

In step 416, E-CN 403 uses the Target cell ID that receives in the step 412 to discern the SGSN 405 that switching command should be sent to.E-CN 403 sends forward direction to the SGSN 405 that is discerned and redistributes request message.This forward direction is redistributed request message and is included in transparent vessel and the Target cell ID that receives in the step 412, and packet data protocol (PDP) context and mobile management (MM) context that are produced by E-CN 403.In step 417, SGSN 405 sends to RNC 406 and redistributes request message.In step 418, SGSN 405 receives the request of redistributing of this transmission message of response and confirms (Ack) message.In response to redistributing request message, RNC 406 is to UE 401 Resources allocation and redistribute the request acknowledge message to SGSN 405 transmissions then.

In step 419, SGSN 405 redistributes response message to E-CN 403 transmission forward directions and redistributes request message with the response forward direction.Redistributing request acknowledge message and forward direction redistributes response message and comprises that " DRNC is to the SRNC transparent vessel " and RAB (RAB) foundation/failure tabulate.This " DRNC is to SRNC transparent vessel " comprises the RRC message in the RRC container.RAB foundation/failure tabulation comprises radio bearer (RB) information that is used to insert RNC 406.For example, RAB sets up ID and the QoS information that tabulation (" RAB sets up tabulation ") is included in the RAB that normally sets up among the RAB of the foundation of asking, and RAB failure tabulation comprises the ID of the RAB that (tabulation that RAB can not set up) can not normally set up in the RAB that asks foundation.The message of exchange can be used in traditional UMTS system the form that exchanges messages between the SGSN in the SRNC re-allocation process in step 416 to 419.And, step 413 to 415 and step 416 to 419 can carry out together and need not consideration order.

If each preparation that is used for switching all finishes in the UMTS of goal systems system, user data at first is sent to GGSN404 by the tunnel of setting up in the step 415 from E-CN 403 in step 420.Can in step 430 and step 432, carry out the initialization that data transmit.

In step 421 and 422, E-CN 403 transmits switching command message by E-RAN 402 to UE 401.The RB information that is provided by the UMTS system in the step 419 is provided this switching command message.In step 423, in case receive switching command message, UE 401 changes into CDMA with RAT from OFDM.

In step 424, UE 401 carries out with RNC 406 up links (UL)/down link (DL) synchronous according to CDMA.If UE 401 and RNC 406 detect the other side mutually respectively in step 425 and 426, then in step 427 RNC 406 send to SGSN 405 indication UE 401 detection redistribute detect-message.If UE 401 sends the RRC message that is used to ask the RRC connection to RNC 406 in step 428, then RNC 406 redistributes to SGSN 405 transmissions and finishes message in step 429.In step 430 and 431, SGSN 405 sends forward directions to E-CN 403 and redistributes and finish message, and receives forward direction and redistribute and finish acknowledge message and redistribute and finish message to respond this forward direction.

In step 432, the transmission path that E-CN 403 may change UE 401 does not comprise E-RAN 402 so that it comprises GGSN 404.In step 433 and 434, if necessary, SGSN 405 sends to GGSN 404 and upgrades the PDP Context request message, and receives then in response to the renewal PDP Context response message that upgrades the PDP Context request message.At last, in step 435, between UE 401 and RNC 406, carry out routing region updating and handle, make and to communicate by letter between UE 401 and the RNC 406.

Second exemplary embodiment of the present invention is being set up the tunnel and is being sent user data by this tunnel at CN 330 during as GGSN 360 running between E-CN 330 and the SGSN 350 so that even after switching UE 310 can use its old IP address.With reference to figure 3, according to second exemplary embodiment of the present invention, the data transfer path after the switching is expressed as PDN (390)-E-CN (330)-SGSN (350)-RNC (340)-UE (310).As E-CN 330 during as GGSN 360 running, signaling is redistributed processing by SRNS between the SGSN that uses traditional UMTS system effectively and define and is advantageously switched between back-up system and do not need SGSN and the RNC of traditional UMTS are made amendment between the node that is used for switching.

Fig. 5 has illustrated the handoff procedure according to second exemplary embodiment of the present invention.Similarly, the prefix " s " and " t " that link to each other with each namespace node indicate source and target respectively.

With reference to figure 5, in step 460, the UE 451 that is connected to the E-UMTS system measures the quality information as the power stage that is received of UMTS system or the signal strength signal intensity that received, and the measurement report message that will include about the quality information of UMTS system sends to E-RAN 452.In step 461, E-RAN 452 determines whether to carry out between RAT and switches.Determine to carry out switch between RAT after, E-RAN 452 sends to E-CN 453 and switches the message that needs in step 462.Comprise " source RNC is to the Target RNC transparent vessel " that is used for traditional UMTS SRNS of system re-allocation process in the message that this switching needs, and expectation target sub-district ID.That is to say that E-RAN 452 produces " source RNC is to the Target RNC transparent vessel " so that Target RNC 456 is appreciated that it, and the measurement report message among the UE 451 is included in the transparent vessel.

Transparent vessel is used for redistributing between SGSN.Even this transparent vessel is sent to Target RNC by core network from source RNC, core network is not opened this container yet and is detected its content.Following information is included in " source RNC is to the Target RNC transparent vessel ": the RRC container; the Iu receiving number (for example; " 1 " indication Iu-PS); redistribute type (being set to usually comprise UE's); integrity protection/enciphered message; Target cell ID, track record session information and multimedia broadcast/multi broadcast business (MBMS) link information.

In step 463, for the virtual SGSN operation as traditional UMTS system, E-CN 453 produces PDP Context and the MM context relevant with UE 451, for example PDP/MM context.This PDP Context comprises IP address and the QoS level of business/user profile as distribute to UE 451 in the E-UMTS system.E-CN 453 can produce MM context and PDP Context naturally.Alternatively, E-CN 453 can obtain necessary information from UE 451 and produce MM context and PDP Context.Under a back situation, E-CN 453 sends the message that is used to ask to be used for produce the necessary information of MM context and PDP Context to UE 451, and receives message as the necessary information that is used to produce MM context and PDP Context comprising of its response from UE 451.

In step 464, E-CN 453 discerns the SGSN 455 that switching command is sent to by use the Target cell ID that receives in step 462, and redistributes request message to the SGSN 455 transmission forward directions of being discerned.This forward direction is redistributed request message and is included in transparent vessel and the Target cell ID that receives in the step 462, and the PDP Context and the MM context that produce in step 463.This PDP Context comprises that the GGSN address is to make things convenient for the suitable GGSN of SGSN 455 identifications.In one exemplary embodiment of the present invention, the address that this PDP Context comprises E-CN 453 is virtual GGSN as the address of GGSN so that SGSN 455 can discern E-CN 453.In this way, between E-CN 453 and SGSN 455, directly open data tunnel and do not need by GGSN 454.

In step 465, SGSN 455 sends to RNC 456 and redistributes request message.In step 466, in response to redistributing request message, RNC 456 is to UE 451 Resources allocation and redistribute the request acknowledge message to SGSN 455 transmissions then.This is redistributed acknowledge message and comprises " DRNC is to the SRNC transparent vessel ".

In step 467, SGSN 455 sends forward directions to E-CN 453 and redistributes response message and redistribute request message to respond this forward direction, and this forward direction is redistributed request acknowledge message and this forward direction and redistributed response message and comprise that " DRNC is to the transparent vessel of SRNC " and RAB foundation/failure tabulate.This RAB foundation/failure tabulation comprises the RB information that is used to insert RNC 456.For example, RAB foundation tabulation comprises ID and the QoS information corresponding to the normal RAB that sets up among the RAB that is requested to set up.The ID of the RAB that can not normally set up among the RAB that the RAB failure tabulation request of being included in is set up.The message of exchange can be used in traditional UMTS system the form that exchanges messages in the SRNS re-allocation process between SGSN in

step

464 and 467.

Prepare all in the UMTS of goal systems system, to finish if each switches, in step 468, user data is sent to SGSN 455 from E-CN 453 by the data tunnel of in step 464, setting up.Can carry out data in

step

468 and 480 initially transmits.

In step 469 and 470, E-CN 453 transmits switching command message by E-RAN 452 to UE 451.The RB information that is provided by the UMTS system in the step 467 is provided this switching command message, and this " DRNC is to SRNC transparent vessel ".In step 471, in case receive this switching command message, UE 451 will change into CDMA to RAT from OFDM.

In step 472, UE 451 is synchronous according to the UL/DL of CDMA execution and RNC 456.If UE 451 and RNC 456 detects mutually respectively in step 473, then in step 475 RNC 456 send to SGSN 455 indication UE 451 detection redistribute detect-message.If UE 451 sends RRC message according to the information that is included in " DRNC is to the SRNC transparent vessel " to RNC 456 in step 476, then RNC 456 redistributes to SGSN 455 transmissions and finishes message in step 477.In step 478 and 479, SGSN 455 sends forward directions to E-CN 453 and redistributes and finish message, and receives this forward direction of response and redistribute the forward direction of message and redistribute and finish acknowledge message.

In step 480, E-CN 453 changes data transfer path for UE 451 so that it comprises SGSN 455 and does not comprise E-RAN 452.In step 481 and 482, if desired, SGSN 455 sends to E-CN 453 and upgrades the PDP Context request message, and this upgrades the renewal PDP Context response message of PDP Context request message to receive response then.At last,, between UE 451 and E-CN 453, carry out routing region updating and handle, make and between UE 451 and RNC 456, can communicate by letter in step 483.

Preceding method does not need to change the IP address of

communication UE

401 and 451 when using in the traditional UMTS system SRNS between SGSN to redistribute the signaling transmission that processing is used for switching effectively between XM.Therefore, exemplary embodiment of the present invention can be used traditional SGSN and RNC and not need to revise.

Fig. 6 has illustrated the UE structure according to first and second exemplary embodiments of the present invention.

With reference to figure 6,

Reference numeral

510 and 530 is represented UMTS information receiving and transmitting machine and E-UMTS information receiving and transmitting machine respectively.UMTS information receiving and transmitting machine 510 and E-UMTS information receiving and transmitting machine 530 are based at least one exemplary embodiment of the present invention exchange message between UMTS system and E-UMTS system.UMTS information receiving and transmitting machine 510 and E-UMTS information receiving and transmitting machine 530 are connected on the message processing device 520.Although not explanation, UMTS information receiving and transmitting machine 510 and E-UMTS information receiving and transmitting machine 530 and UMTS system and E-UMTS system are by communicating at the frequency band processing ofdm signal of UMTS system and E-UMTS system and radio frequency (RF) unit of CDMA signal.

Message processing device 520 produces and is transferred to the message of UMTS system and E-UMTS system, and the message that transmits this generation is to UMTS information receiving and transmitting machine 510 and E-UMTS information receiving and transmitting machine 530.Further, message processing device 520 is analyzed the message that receives from UMTS system and E-UMTS system by UMTS information receiving and transmitting machine 510 and E-UMTS information receiving and transmitting machine 530, and carries out operations necessary, particularly switches relevant operation.UMTS s-meter 540 is measured from the signal strength signal intensity of the system of current connection such as the reception of UMTS system.If measured signal strength signal intensity is greater than or equal to threshold value, then UMTS s-meter 540 provides the quality information of the measured signal strength signal intensity of indication so that switch beginning to message processing device 520.

Fig. 7 has illustrated the operating process of the UE of first and second exemplary embodiments according to the present invention.

With reference to figure 7, in step 610, UMTS signal measuring apparatus 540 is measured the signal strength signal intensity that receives from the UMTS system.If measured signal strength signal intensity is greater than or equal to threshold value, then UMTS signal measuring apparatus 540 provides the quality information of the measured signal strength signal intensity of indication to message processing device 520.This message processing device 520 produces the measurement report message (step 410) that comprises quality information.This measurement report message is sent in the E-UMTS system by E-UMTS information receiving and transmitting machine 530.

If determine that in step 620 E-UMTS information receiving and transmitting machine 530 receives switching command message (step 422), then UE jumps to step 630.Otherwise UE returns step 610.In step 630, in case receive switching command message, UE changes to UMTS (CDMA) with the RAT of its RF unit (not shown) from E-UMTS (OFDM).After this, in step 640, UE uses message processing device 520 and UMTS information receiving and transmitting machine 510 to carry out in the UMTS systems that SRNS redistributes program (step 424 to 435) between SGSN.

Fig. 8 has illustrated the structure according to the E-RAN of first and second exemplary embodiments of the present invention.

With reference to figure 8, wireless information transceiver 710, its processing and UE communicate by letter, and receive measurement report message (step 410) from UE, and send switching command message (step 422) to UE.Switching determiner 740 is based on the quality information that is included in the measurement report message that wireless information transceiver 710 provided and determines whether to carry out the unit that UE switches.This switching determiner 740 determines whether need to consider the moving direction of UE and the load of each sub-district for switching between RAT.

Switch if desired, switch determiner 740 and send the sign that indication need be switched to message processing device 720.This message processing device 720 produces the message that sends to UE or E-CN, and analyzes from the message that UE or E-CN received.Internet message transceiver 730 at least one exemplary embodiment according to the present invention by send switching message (step 412) from needs to E-CN and receive switching command message (step 421) from E-CN and handle message with E-CN.

Fig. 9 has illustrated the operating process according to the E-RAN of first and second exemplary embodiments of the present invention.

With reference to figure 9, in step 810, wireless information transceiver 710 receives measurement report message (step 410) from UE.In step 820, switch determiner 740 and determine whether to need to carry out switching between RAT according to the quality information that is included in the UMTS system in the measurement report message (step 411).For example, if the signal strength signal intensity in the UMTS system is greater than or equal to threshold value, then switches determiner 740 and determine to carry out switching between RAT.

If determine and need switch, message processing device 720 produces in step 830 and switches the message (step 412) that needs, and the message that this switching needs is sent to E-CN by internet message transceiver 730.The message that this switching needs comprises " source RNC is to the Target RNC transparent vessel ".In step 840, internet message transceiver 730 is waited for the switching command message (step 421) that receives from E-CN.In a single day receive this switching command message in step 840, message processing device 720 produces the switching command message (step 422) that sends to UE in step 850 based on this switching command message.The switching command message that is produced is sent to UE by wireless information transceiver 710.

Figure 10 has illustrated according to the present invention the structure of the E-CN of first and second exemplary embodiments.

With reference to Figure 10, three information receiving and transmitting machines 910,930 and 940 are the message of processing and E-RAN, SSGN and GGSN respectively, and is connected to Message Processing and establishes on 920.Produce the message that sends to other node from E-CN according to this message processing device 920 of at least one exemplary embodiment of the present invention, and analyze the message of importing into from other contact.In the

data transceiver

950 and 960 each all with the external network exchanging user data of PDN and GGSN.

For example, with reference to figure 4, before switching, the downlink data that E-CN will receive from the PDN through PDN data transceiver 950 is sent to the E-RAN through E-RAN (not shown) data transceiver.If information receiving and transmitting machine 940 receives HO response message (step 414) between the RAT that comprises the GGSN address information from GGSN, tunnel control device 970 uses this GGSN address information to set up the tunnel that is used for user's face.As a result, after switching, packet is along path P DN-E-CN-(Tunnel)-GGSN-SGSN-RNC-UE transmission.

With reference to figure 5, before switching, the downlink data that E-CN will receive from the PDN through PDN data transceiver 950 is sent to the E-RAN through the data transceiver of E-RAN (not shown).After information receiving and transmitting machine 930 and SGSN exchange forward direction were redistributed requests/response messages, tunnel control device 970 was established to the tunnel for user's face of SGSN.As a result, after switching, packet can be along path P DN-E-CN-(Tunnel)-SGSN-RNC-UE transmission.

In case tunnel control device 970 is set up data tunnel, the downlink data that this data transceiver 960 sends from data transceiver 950 to GGSN or SGSN.

Figure 11 has illustrated the operating process according to the E-CN of first exemplary embodiment of the present invention.

With reference to Figure 11, after the message (step 412) that information receiving and transmitting machine 910 receive to switch needs from E-RAN in step 1002, message processing device 920 produces between RAT that the HO request message is sent to GGSN by information receiving and transmitting machine 940 between HO request message (step 413) and this RAT in step 1004.The HO request message can comprise tunnel information between RAT, in the future can transmit user data by this tunnel E-CN, and as the information of PDP Context and UE-id.

In step 1006, information receiving and transmitting machine 930 is redistributed request message (step 416) to the forward direction that SGSN transmits message processing device 920 generations.This forward direction is redistributed request message and can be used message format identical with SRNS re-allocation process between SGSN in traditional UMTS system.Therefore, the message processing device 920 of E-CN can be imitateed the message generation function of SGSN.Here, step 1004 and 1006 trans-substitutions mutually.

After HO request message and forward direction are redistributed request message between transmission RAT, information receiving and transmitting machine 940 is waited for from HO request response between the RAT of HO request message between the response RAT of GGSN in step 1008, and the forward direction that 930 waits of information receiving and transmitting machine are redistributed request message from this forward direction of response of SGSN in step 1012 is redistributed response message.

In case receive HO response message between RAT in step 1008, tunnel control device 970 is set up the tunnel of user's face (as the user tunnel) to GGSN in step 1010.Redistribute response message if receive forward direction in step 1012, information receiving and transmitting machine 910 transmits the switching command message that message processing device 920 produces to E-RAN in step 1014.

After send switching command message to E-RAN, user's associated tunnel that E-CN has determined whether to have set up in step 1016 to GGSN.If do not arrive the tunnel of GGSN, E-CN turns back to step 1008 and waits for up to the tunnel that is established to GGSN.But if established the tunnel of GGSN, E-CN uses the 930 wait receptions of information receiving and transmitting machine to redistribute from the forward direction of SGSN in step 1020 and finishes message.Redistribute and finish message in case receive forward direction, information receiving and transmitting machine 930 sends the forward direction that is produced by message processing device 920 in step 1022 to SGSN and redistributes and finish acknowledge message (step 431).Alternatively, E-CN can begin to transmit down link data to GGSN (step 1018) by data tunnel after step 1016, or begins transmit down link data by data tunnel to GGSN (step 1024) in step 1022 back.

Figure 12 has illustrated the operation according to the E-CN of second exemplary embodiment of the present invention.

With reference to Figure 12, information receiving and transmitting machine 910 receives the message (step 452) that switching needs from E-RAN in step 1032, and information receiving and transmitting machine 930 is redistributed request message (step 464) to the SGSN transmission by the forward direction that message processing device 920 produces in step 1034.This forward direction is redistributed request message can be identical with the employed message format of SRNS re-allocation process between SGSN in the traditional UMTS system.Therefore, the message processing device 920 of E-CN can imitate the message of SGSN to produce function.This forward direction is redistributed request message and is comprised PDP Context and MM context, and message processing device 920 is virtual GGSN as the E-CN address so that SGSN can discern E-CN with the GGSN address setting in PDP Context.

After the transmission forward direction was redistributed request message, the forward direction that 940 waits of information receiving and transmitting machine are redistributed request message from the response forward direction of SGSN in step 1036 was redistributed response message.Redistribute response message in case receive this forward direction, tunnel control device 970 is set up the tunnel of user's face to SGSN in step 1038.In step 1040, E-CN begins to transmit to the data of SGSN.Here, step 1040 is optional.Redistribute response message if receive forward direction in step 1038, message processing device 910 transmits the switching command message that is produced by message processing device 920 to E-RAN in step 1042.

After sending switching command message to E-RAN, E-CN waits in step 1044 that information receiving and transmitting machine 930 receives to redistribute from the forward direction of SGSN and finishes message.Redistribute and finish message in case receive forward direction, information receiving and transmitting machine 930 sends the forward direction that is produced by message processing device 920 to SGSN and redistributes and finish acknowledge message (step 431) in step 1046.E-CN can transmit down link data by data tunnel to SGSN (step 1040) between step 1038 and step 1042, or transmits down link data by data tunnel to SGSN (step 1048) in step 1046 back.

Figure 13 has illustrated the structure according to the GGSN of first and second exemplary embodiments of the present invention.Handle the message relevant according at least one message processing device in the previous embodiment 1120, and information receiving and transmitting machine 1110 and E-CN exchange messages with E-CN.The traditional GGSN functional unit of Reference numeral 1130 expression, and traditional GGSN functional unit 1130 is as the GGSN of traditional UMTS system.That is to say, except function, also carry out message with E-CN with traditional GGSN according to the GGSN of exemplary embodiment of the present invention.

Figure 14 has illustrated the operation according to the GGSN of first exemplary embodiment of the present invention.

With reference to Figure 14, in a single day in step 1210, receive HO request message between RAT from E-CN, information receiving and transmitting machine 1110 sends HO response message between the RAT that is produced by message processing device 1120 in step 1220 to E-CN.The HO response message comprises the GGSN address and about the port numbers in user tunnel, so that E-CN can be established to the user tunnel of GGSN between this RAT.If receive downlink user data by the user tunnel from E-CN in step 1230, then traditional GGSN functional unit 1130 is handled downlink user data as the data that transmit from outside PDN in step 1240.

Be provided for the 3rd exemplary embodiment of the present invention from the UMTS system to the E-UMTS system.

For in addition after switching UE use its old IP address, E-CN to be established to the data tunnel of SGSN and send user data from the tunnel by the SGSN function of carrying out traditional UMTS system.With reference to figure 3, be PDN (390)-GGSN (360)-E-CN (330)-E-RNC (320)-UE (310) according to the data transfer path after the 3rd exemplary embodiment switching of the present invention.By making full use of SRNS re-allocation process between the SGSN that defines in the traditional UMTS system, when E-CN almost ideal can be used as GGSN the time, the switching between the node that is used to switch between signaling transmission back-up system and do not need GGSN, SGSN and the RNC function of traditional UMTS system are made amendment.

Figure 15 has illustrated the handoff procedure according to the 3rd exemplary embodiment of the present invention.Here, the prefix " s " and " t " that link to each other with each namespace node indicate source and target respectively.

With reference to Figure 15, in step 1310, the UE 1301 that is connected to the UMTS system measures the quality information as the power stage that receives of E-UMTS system or the signal strength signal intensity that receives.UE 1301 sends the measurement report message that includes E-UMTS mass of system information to RNC1302.In step 1311, RNC1302 determines whether to carry out and switches.After determining to carry out switching, RNC 1302 sends to SGSN 1303 and redistributes the message that needs in step 1312.This redistributes the message that needs, and is similar to the switching in the traditional UMTS system, comprises Target cell Id and " source RNC is to the Target RNC transparent vessel ".

In step 1312, SGSN 1303 determines that it should carry out that SRNS redistribute processing between SGSN according to being included in Target cell Id in the message of redistributing needs.In step 1313, SGSN 1303 sends forward direction to E-CN 1305 and redistributes request message.SGSN 1303 is used for the forward direction that SRNC redistributes between general SGSN to E-CN 1305 transmissions and redistributes request message, considers that E-CN 1305 is another SGSN of UMTS system.Forward direction is redistributed request message and is comprised the GGSN address, and " source RNC is to the Target RNC transparent vessel " sets up RAB, MM context and the PDP Context of tabulation.

In step 1314, E-CN 1305 reanalyses to be included in and is used for the E-UMTS system and redistributes RAB information in the request message as the forward direction of user plane bearer information, (being that RAB sets up tabulation).In step 1315, E-CN 1305 is established to the up carrying of E-RAN 1306.In step 1319, E-CN1305 redistributes the upstream data tunnel that GGSN address in the request message is established to GGSN 1304 based on being included in forward direction.

Execution in

step

1315 and 1319 o'clock, E-CN 1305 sent the response forward directions to SGSN 1303 and redistributes the forward direction of request message and redistribute response message in step 1316.This forward direction is redistributed response message and is comprised " Target RNC is to source RNC transparent vessel ".For example, if possible, E-CN1305 can ideally imitate and send the target SGSN that forward direction is redistributed response message in the SRNS re-allocation process between SGSN.

In step 1317, SGSN 1303 redistributes command messages to RNC 1302 transmissions and redistributes response message with the response forward direction.In step 1318, RNC 1302 reads and is included in " DRNC is to the SRNC transparent vessel " redistributed in the command messages, and uses and redistribute command messages is included in RRC message from transparent vessel to UE 1301 transmissions.

In step 1320, UE 1301 changes RAT into OFDM from CDMA and redistributes command messages with response.In step 1321, UE 1301 carries out with the UL/DL of the tE-RAN 1306 that comprises E-RAN synchronous.If UE 1301 and tE-RAN 1306 detect respectively mutually in step 1322 and 1323, then UE 1301 quarters in the Target cell that E-RAN covers in step 1324.Step 1325 to 1328 in the back provides processing, and wherein E-CN 1305 imitates the function of the target SGSN in the SRNS re-allocation process between SGSN.In step 1325 and 1326, E-CN 1305 sends between indication SGSN SRNC to source SGSN 1303 and redistributes the common forward direction of finishing and redistribute and finish message, and receives forward directions from SGSN 1303 then and redistribute and finish acknowledge message.In step 1327 and 1328, if desired, E-CN 1305 sends renewal PDP Context request message and revises its PDP Context with request GGSN 1304 to depend on change possible in the QoS information, and receives renewal PDP Context response messages from GGSN 1304.At last, in step 1329, between UE 1301, E-CN 1305 and GGSN 1304, carry out routing region updating and handle, so that between UE 1301 and E-RAN 1306, can communicate by letter.

After switching, according to the 3rd exemplary embodiment of the present invention, data transfer path becomes GGSN-E-CN-E-RNC-UE.The IP address of distributing to UE remains unchanged.

Claims

One kind be used to carry out from based on the reinforcement universal mobile telecommunications service E-UMTS system of orthogonal frequency division modulated OFDM to method based on the switching of the UMTS system of code division multiple access CDMA, this method comprises:

Measure the signal strength signal intensity of UMTS system by user equipment (UE), and send the measurement report message of the measured signal strength signal intensity of indication to the E-UMTS system, wherein UE communicates by letter with packet data network (PDN) by the E-UMTS system;

Radio Access Network E-RAN by the E-UMTS system determines the switching of execution from the E-UMTS system to the UMTS system based on measured signal strength signal intensity;

If determine to switch, be the data tunnel that UE is established to the gateway general packet radio service GPRS Support Node GGSN of UMTS system from the handoff request of E-RAN by the core network E-CN response of E-UMTS system;

After setting up this data tunnel, send to UE by E-CN and to comprise the switching command message that is used for inserting the radio bearer RB information of UMTS system by UE;

UE uses this RB information to insert the UMTS system; And

After inserting the UMTS system, the user data of the data transfer path transmission UE that UE forms by the RAN by the Serving GPRS Support Node SGSN of E-CN, data tunnel, GGSN, UMTS system and UMTS system between PDN and UE.
2. the method for claim 1 comprises that further exchange is used to set up the GGSN address of data tunnel between E-CN and GGSN.
3. the method for claim 1 wherein further comprises:

After determining switching, send the handoff request message that comprises " source radio network controller RNC is to the Target RNC transparent vessel " and target cell identifier to E-CN by E-RAN;

Send to GGSN in response to handoff request message by E-CN and to include the IP address of in the E-UMTS system, distributing to UE and the inter-radio access technology RAT handoff request message of service quality QoS information and UE identifier;

Send between RAT switching response message in response to handoff request message between RAT to E-CN by GGSN; And

Receive between RAT after the switching response message from GGSN at E-CN, redistribute resource in response to request to UE from E-CN by SGSN.
4. method as claimed in claim 3, wherein said SGSN comprises to the step that UE redistributes resource in response to the request from E-CN:

Send the forward direction that comprises transparent vessel and target cell identifier, the identification of use target cell identifier by E-CN to the SGSN of UMTS system and redistribute request message;

Redistribute request message by SGSN in response to forward direction and redistribute request message to the RNC transmission;

After the UE Resources allocation, redistribute the request acknowledge message to the SGSN transmission by RNC in response to redistributing request message; And

Redistribute response message in response to redistributing the request acknowledge message to the forward direction that the E-CN transmission comprises RB information and transparent vessel by SGSN.
5. method as claimed in claim 4 wherein sends switching command message to UE and comprises that redistributing response message by E-CN in response to forward direction sends switching command message by E-RAN to UE.
One kind be used to carry out from based on the reinforcement universal mobile telecommunications service E-UMTS system of orthogonal frequency division modulated OFDM to method based on the switching of the UMTS system of code division multiple access CDMA, this method comprises:

Measure the signal strength signal intensity of UMTS system by user equipment (UE), and send the measurement report message of the measured signal strength signal intensity of indication to the E-UMTS system, wherein UE communicates by letter with packet data network PDN by the E-UMTS system;

Radio Access Network E-RAN by the E-UMTS system determines the switching of execution from the E-UMTS system to the UMTS system based on measured signal strength signal intensity;

If determine to switch, then produce packet data protocol PDP Context and the mobile management MM context of UE in response to the handoff request of E-RAN by the core network E-CN of E-UMTS system;

Use this PDP and MM context to be established to the data tunnel of the gateway general packet radio service GPRS Support Node GGSN of UMTS system as UE by E-CN;

After setting up this data tunnel, send to UE by E-CN and to include the switching command message that UE is used for inserting the radio bearer RB information of UMTS system;

Use this RB information to insert the UMTS system by UE; And

After being linked into the UMTS system, the data transfer path of being made up of by the RAN by E-CN, data tunnel, Serving GPRS Support Node SGSN and UMTS system between PDN and UE UE transmits the user data of UE.
7. method as claimed in claim 6, wherein this PDP Context comprises that address as the E-CN of GGSN address is so that SGSN can discern the E-CN as GGSN.
8. method as claimed in claim 6 further comprises, after determining switching, sends the handoff request message that comprises " source radio network controller RNC is to the Target RNC transparent vessel " and target cell identifier to E-CN by E-RAN.
9. method as claimed in claim 8 further comprises, after producing PDP and MM context, redistributes resource in the request of E-CN to UE by the UMTS system responses.
10. method as claimed in claim 9, wherein resource is redistributed and is comprised:

Use target cell identifier identification SGSN by E-CN, and send to SGSN and to comprise transparent vessel, target cell identifier and PDP and the contextual forward direction of MM is redistributed request message;

Redistribute request message by SGSN in response to forward direction and redistribute request message to the RNC of the UE that can be connected to UMTS system transmission;

Send to SGSN and redistribute the request acknowledge message after the UE Resources allocation, redistributing request message by RNC in response to this; With

Redistribute response message in response to redistributing the request acknowledge message to the forward direction that the E-CN transmission comprises RB information and " Target RNC is to source RNC transparent vessel " by SGSN.
11. method as claimed in claim 10 wherein sends switching command message to UE and comprises that redistributing response message by E-CN in response to forward direction sends switching command message by E-RAN to UE.
12. one kind be used to carry out from based on the reinforcement universal mobile telecommunications service E-UMTS system of orthogonal frequency division modulated OFDM to equipment based on the switching of the UMTS system of code division multiple access CDMA, this equipment comprises:

The Radio Access Network E-RAN of E-UMTS system, it is used for receiving from user equipment (UE) the measurement report message of the signal strength signal intensity that is designated as the UMTS systematic survey, and determine whether to carry out switching from the E-UMTS system to the UMTS system based on measured signal strength signal intensity, wherein UE communicates by letter with packet data network PDN by the E-UMTS system; With

The core network E-CN of E-UMTS system, determine to switch if be used for, originate in packet data protocol PDP Context and the mobile management MM context of UE in response to the handoff request of E-RAN, use this PDP and MM context to be established to the data tunnel of the UE of gateway general packet radio service GPRS Support Node GGSN, send to UE and comprise the switching command message that UE is used for inserting the radio bearer RB information of UMTS system;

Wherein after inserting the UMTS system, in response to switching command message, the data transfer path that UE forms by the RAN by E-CN, data tunnel, Serving GPRS Support Node SGSN and UMTS system between PDN and UE transmits the user data of UE.
13. equipment as claimed in claim 12, wherein this PDP Context comprises that address as the E-CN of GGSN address is so that SGSN can discern the E-CN as GGSN.
14. equipment as claimed in claim 12, wherein after determining switching, E-RAN sends to E-CN and comprises source radio network controller RNC to the transparent vessel of Target RNC and the handoff request message of target cell identifier.
15. equipment as claimed in claim 12, wherein after producing PDP and MM context, E-CN sends the request that is used for redistributing to UE resource to the UMTS system.
16. equipment as claimed in claim 15, wherein E-CN uses target cell identifier to discern SGSN, and sends to SGSN and to comprise transparent vessel, target cell identifier and PDP and the contextual forward direction of MM is redistributed request message;

Wherein SGSN redistributes request message in response to forward direction and redistributes request message to the RNC of the UE that can be connected to UMTS system transmission;

Wherein RNC is comprising the redistribute request acknowledge message of Target RNC to source RNC transparent vessel in response to redistributing request message to the SGSN transmission after the UE Resources allocation; And

Wherein SGSN sends to E-CN and comprises RB information and Target RNC is redistributed the request acknowledge message to the forward direction of source RNC transparent vessel in response to redistributing the request acknowledge message.
17. equipment as claimed in claim 16, wherein E-CN redistributes response message in response to forward direction and sends switching command message by E-RAN to UE.
18. the method for being carried out by user equipment (UE) from switching to the reinforcement universal mobile telecommunications service E-UMTS system of orthogonal frequency division modulated OFDM based on the universal mobile telecommunications service UMTS system of code division multiple access CDMA, this method comprises:

Measure the signal strength signal intensity of E-UMTS system by the UE that communicates by letter with packet data network PDU by the E-UMTS system, and send the measurement report message of the measured signal strength signal intensity of indication to the UMTS system;

Radio Access Network RAN by the UMTS system determines the switching of execution from the UMTS system to the E-UMTS system based on measured signal strength signal intensity;

After determine switching, send from what source radio network controller RNC received to the service universal packet wireless business affair GPRS Support Node SGSN of UMTS system by RAN and to redistribute request message;

Redistribute request message in response to redistributing request message to the core network E-CN of E-UMTS system transmission forward direction by SGSN;

Be established to Data-carrying and the data tunnel of UE of the gateway general packet radio service GPRS Support Node GGSN of the Radio Access Network E-RAN of E-UMTS system and UMTS system by E-CN;

After setting up data tunnel, redistribute command messages by RAN to the UE transmission in response to the request of E-CN by SGSN; And

Insert the E-UMTS system by UE in response to redistributing command messages.
19. method as claimed in claim 18, wherein this is redistributed request message and comprises target cell identifier and " source RNC is to the Target RNC transparent vessel ".
20. method as claimed in claim 19, wherein this forward direction is redistributed the address that request message comprises GGSN, and it is used for setting up data tunnel, transparent vessel, is used for setting up the radio bearer RB information of Data-carrying, packet data protocol PDP Context and mobile management MM context.