CN101005692A

CN101005692A - Method for reducing terminal switch between LTE and 3G cut-in technology

Info

Publication number: CN101005692A
Application number: CNA2006100038254A
Authority: CN
Inventors: 王弘; 李小强; 孙春迎; 许丽香; 朱彦民; 崔成豪
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2006-01-20
Filing date: 2006-01-20
Publication date: 2007-07-25

Abstract

A method for supporting the reduction of signaling caused by reselecting different access technologies for a terminal in an idle mode, comprising steps: SGSN receives an area update message sent by UE; SGSN sends a first message to an LTE network node; the LTE network node Send the second message to the SGSN; the SGSN sends an area update confirmation message to the UE. By using the method of the invention, the signaling when the terminal switches access modes can be reduced. On the other hand, using the method of the present invention, the LTE terminal can be kept in the URA-PCH state under the 3G access technology.

Description

The method of the signaling that the minimizing terminal is switched between LTE and 3G access technology

Technical field

The present invention relates to a kind ofly in mobile communication system Long Term Evolution (hereinafter to be referred as the LTE) system configuration that third generation partner plan (hereinafter to be referred as 3GPP) proposes, reduce the user in the method for carrying out the signaling of access technology when between 3G and LTE, switching.

Background technology

Existing third generation partner plan (hereinafter to be referred as 3GPP) structure as shown in Figure 1.Be description below to Fig. 1 3GPP system configuration.

101 subscriber equipmenies (hereinafter to be referred as UE) are the terminal equipments that is used for receiving data.102NodeB is the node of being responsible for (being called for short RNS) wireless receipts/send out in the RNS.103 control radio network controllers (hereinafter to be referred as CRNC) are the radio network controllers of directly controlling NodeB.104 service wireless network controllers (hereinafter to be referred as SRNC) are the radio network controllers (hereinafter to be referred as RNC) of control beared information, as Radio Resource control (hereinafter to be referred as RRC) state.105 gateway general packet radio service (is GPRS hereinafter to be referred as GPRS) support nodes (is GGSN hereinafter to be referred as Gateway GPRS Support Node) and 106 Serving GPRS Support Nodes (hereinafter to be referred as SGSN) provide route for the transmission of data.107 E-PDN are outside public data networks, and data source is provided.

RNC and Node B belong to connecting system, SGSN and GGSN belong to core net, the interface of connecting system and core net can have different agreements, what A/Gb mode was meant that the interface of connecting system and core net uses is A interface or Gb Interface, the system that also can call the system that uses the A/Gb pattern 2G, what the Iu pattern was meant that the interface of connecting system and core net uses is the Iu interface, also can call the system that uses the Iu pattern system of 3G.

For ambulant management, UE is divided into different states, to the Iu pattern, the state of mobile management is divided into packet not to be had and adheres to (PMM-DETACHED), and the packet free time (PMM-IDLE), packet connects (PMM-CONNECTED).The all individual function of each state also is assigned with corresponding information, and these information are kept in the context of mobile management of terminal and SGSN.

Under the PMM-DETACHED state, do not communicate by letter between terminal and the SGSN, there be not positional information or the routing iinformation of UE in MS and the SGSN context.The state machine of the mobile management of terminal does not respond the relevant broadcast message with SGSN.SGSN does not know the position of terminal.Terminal is initiated " attaching process ", and the signaling of having set up between terminal and the SGSN connects, and the state of mobile management has forwarded the PMM-CONNECTED state to from the PMM-DETACHED state.

Under the PMM-IDLE state, SGSN knows which Routing Area is terminal be positioned at.Can initiate paging at whole Routing Area.Terminal and SGSN have set up the context of mobile management.If terminal has moved to another Routing Area, terminal will be initiated the process of routing region updating.If set up the signaling connection between terminal and the SGSN, the mobile management state of terminal and SGSN has just entered the PMM-CONNECTED state.If terminal is initiated " attachment removal process (Detach procedure) ", state just enters PMM-DETACHED.

Under the PMM-CONNECTED state, SGSN knows which SRNC is terminal be positioned under, set up the signaling connection between terminal and the SGSN, if connecting, signaling discharges or broken, terminal enters the PMM-IDLE state, release that signaling connects or failure are to send message to terminal by RNC, and perhaps terminal oneself detects connection failure.If URA upgrades the former thereby failure because of " wireless connections do not have foundation ", wireless connections discharge, and the clock of perhaps working as the URA renewal is overtime, and terminal does not have in coverage, and RNC also will discharge wireless connections.After setting up the signaling connection, SGSN can determine release signaling to connect, and state changes the PMM-IDLE state over to.

When the user converts the access technology of 2G to from the access technology of 3G, if the access node of the access node of 2G and 3G is under the control of same SGSN, according to the residing state of UE, UE has different actions.

If-UE is in the PMM-IDLE state, do not change Routing Area, UE carries out " selectivity routing update process ".

If-UE is in the PMM-IDLE state, and changed Routing Area, UE will send " routing area update procedures ".

If-UE is in the PMM-CONNECTED state, no matter whether changed Routing Area, UE will initiate " routing area update procedures ".

UE is in the PMM-IDLE state, does not change Routing Area, converts 2G to from 3G, does not carry out the routing update process.SGSN does not know that the user has carried out the switching of access technology.Will send when the user has upstream data, if terminal still is in the access module same with sending data or signaling last time, terminal should be initiated normal process, such as, the process of initiation service request.

If the user has changed access technology, the user at first initiates the process of routing update, and the pattern that the present terminal of notice SGSN is used is Iu pattern or A/Gb pattern.After the routing update process finishes, carry out normal process, such as the process of service request.

If SGSN receives user's downlink data, SGSN need be under two kinds of patterns of whole Routing Area calling user, promptly SGSN need send beep-page message to sub-district below the Iu patterns all in the Routing Area and the sub-district below all A/Gb patterns.If terminal is received beep-page message, and, terminal is in the pattern same with sending data or signaling last time, such as, be the data that send under the Iu pattern last time, terminal remains on the Iu pattern, do not switch to the A/Gb pattern, so, terminal is carried out the process of normal page response, such as, carry out the process of service request.If terminal is in the beep-page message of receiving under the pattern different with sending data last time, terminal wants advanced walking along the street by the process of upgrading, then in the process of carrying out normal page response, such as the process of carrying out service request.

When the user under 3G or the 2G system is in PMM-IDLE and moves to zone under another SGSN control, perhaps the user of PMM-CONNECTED pattern has changed over the technology of 2G from 3G technology, the radio access node of 2G is under the control of another SGSN, and the user will initiate the process of routing region updating.

In UE moves to a new Routing Area (Routing Area), perhaps cycle routing update clock arrives the scheduled time, perhaps RRC connects because the reason of " signaling connection rebuilding is upright " discharges, perhaps terminal need report that new access capability is to network, under these situations, terminal all will be initiated the process of routing update.UE will initiate the process of routing region updating.Routing Area is the combination of one group of sub-district of SGSN definition, and SGSN is to Route Distinguisher RAI of this group cell allocation.Routing update may be the renewal of intra-SGSN or inter-SGSN, and periodic routing update all is the routing update of Intra-SGSN, may be that URA upgrades and RA upgrades the process that makes up.Be in PMM-IDLE or PMM-CONNECTED pattern in terminal, can initiate the routing update process.To the terminal of PMM-IDLE pattern, by broadcast channel, UE knows the residing RA in present sub-district, and if old sub-district not at same RA, UE will initiate the process of routing region updating.User for the PMM-CONNECTED pattern, broadcast listening channel not, SRNC is by the indication of special-purpose signaling Routing Area, general, SRNC does not provide RAI user to the PMM-CONNECTED pattern, has only after the SRNC conversion process is carried out, and just notifies UE a new RAI, UE receives new RAI, need carry out routing area update procedures.

Fig. 2 has described in the existing systems structure, and the UE of PMM-IDLE pattern changes the process of Routing Area.

Fig. 3 has described in the existing systems structure, and the UE of PMM-CONNECTED pattern carries out the process of SRNC conversion and routing update.

201 steps: the user of idle pulley moves under the new Routing Area, and the user sends the RA update inquiry information to new SGSN.In the RA update inquiry information, comprise the indication RAI of old Routing Area, the signature signature of old P-TMSI, the network capabilities of user terminal in addition.This message is included in and sends in the RRC message.

202 steps: new SGSN sends message for old SGSN, and requirement obtains the contextual information of the UE of old SGSN preservation.The contextual information of the UE that SGSN preserves comprises mobile management (MM) context and Packet Data Protocol (PDP) context, the MM context comprises the sign of UE, encrypt used information, the wireless capability of terminal, the network capabilities of terminal etc., PDP Context comprises the type of PDP, address information, APN information, tunnel information also has Qos information etc.

203 steps: old SGSN sends the contextual information of UE to new SGSN.

204 steps: new SGSN may initiate security process.

205 steps: new SGSN sends message to GGSN and " upgrades the PDP Context request ", upgrades the PDP Context information that GGSN goes up the UE that preserves, and this message comprises the address of new SGSN, the Tunnel Identifier of distribution, the information of Qos in addition.

206 steps: GGSN sends " upgrading the PDP Context response " message.

207 steps: new SGSN sends " position renewal " message and gives HLR, and HLR is a node of preserving customer position information.Comprise the IP address of new SGSN and the sign IMSI of UE in this message.

208 steps: HLR sends message " delete position record " for old SGSN, the information of the UE that old SGSN deletion is preserved.Old SGSN sends response message " delete position registration confirmed " and gives HLR

209 steps: HLR sends message " Insert subscriber data " and gives new SGSN, and SGSN judges that according to subscriber data whether UE has the right to receive certain service, sends response message then to HLR.

210 steps: HLR sends response message " position is upgraded and confirmed " and gives new SGSN.

211 steps: new SGSN sends " position is upgraded and confirmed " message and gives UE, and this message comprises new P-TMSI.

When UE is in the PMM-CONNECTED pattern, different RRC states can be arranged.The RRC state is the state that Radio Resource connects, and Radio Resource connects the point-to-point two-way connection between the RRC agreement that is meant UE and RNC.To the 3G system, defined idle pulley altogether at present, Cell-DCH, Cell-FACH, five kinds of states of Cell-PCH and URA-PCH.The RRC idle pulley is meant does not have RRC to connect between UE and the RNC.At idle pulley, UE will receive broadcast, the indication of the Routing Area in the broadcast under the broadcast cell, if UE moves to a new Routing Area, UE will initiate the process of routing update.

The Cell-DCH state is meant has RRC to connect between UE and the RNC, and, be configured special-purpose Data-carrying, can transmit data and dedicated signaling between RNC and the UE.At the Cell-DCH state, only listen the broadcast message of a part, and UE need carry out some measurements according to the configuration of RNC.

The Cell-FACH state is meant has RRC to connect between UE and the RNC, and, be configured public Data-carrying, can transmit data and dedicated signaling between RNC and the UE.At the Cell-FACH state, broadcast listening information, cell updating course that can start-up period, in the cycle of RNC config update, UE sends " cell update " message according to the cycle and gives RNC.If UE moves to a new sub-district, UE will send " cell update " message and give RNC.The Cell-PCH state is meant has RRC to connect between UE and the UTRAN, but there is not Data-carrying, cannot send data, if there is downlink data to send, RNC sends paging in whole sub-district, the user sends page-response message, and RNC makes the user enter Cell-DCH or Cell-FACH state then, enters the transmission of data.If upstream data is arranged, " cell update message " will take place in UE, the reason of message is arranged to " upstream data transmission ", RNC sends " cell update affirmation " message and gives UE, in message, can carry by configuration data, make the user enter Cell-DCH or Cell-FACH state, enter the transmission of data.The UE of Cell-PCH will send " cell update " message and give RNC in switching cell.

Also having a state is the URA-PCH state, under the URA-PCH state, there is RRC to connect between UE and the RNC, but do not have Data-carrying, cannot send data, if there is downlink data to send, RNC sends paging in whole sub-district, the user sends page-response message, and RNC makes the user enter Cell-DCH or Cell-FACH state then, enters the transmission of data.If upstream data is arranged, " cell update message " will take place in UE, the reason of message is arranged to " upstream data transmission ", UTRAN sends " cell update affirmation " message and gives UE, in message, can carry by configuration data, make the user enter Cell-DCH or Cell-FACH state, enter the transmission of data.The place that URA-PCH is different with the Cell-PCH state is that URA-PCH user does not send " cell update " message when having switched the sub-district, has only when having switched URA, just sends " URA renewal " message.URA is the combination of one group of sub-district of RNC definition, in broadcast message, broadcasts the sign of the affiliated URA in this sub-district.

At present, be to have changed between these several states, conversion between state is the SRNC decision, if data volume is very big, the user just is set enters the Cell-DCH state,, just allow the user enter the Cell-FACH state if data volume is not very big, if a period of time does not have the activity of up-downgoing data, SRNC can allow the user enter Cell-PCH or URA-PCH state.Under the state of Cell-PCH or URA-PCH, if up data activity is down arranged, SRNC can change UE and enter Cell-FACH or Cell-DCH state.At the Cell-FACH state, if data volume is bigger, SRNC can change UE and enter the Cell-DCH state.

Fig. 3 is in the URA-PCH state with the PMM-CONNECTED mode user, and has the Iur interface to exist, and the Iur interface has only signaling to connect, and does not have data to connect.URA upgrades and the purpose of the combined process that SRNC reshuffles in the process that URA upgrades, be that the tie point of wireless network access network (RAN) and core net (CN) is transformed into the RNC of purpose from original SRNC, the Iu connection has changed to.If purpose RNC and original SRNC are connected to same SGSN, be the process that the SRNC of Intra-SGSN reshuffles so.If routing area change, next to carry out the routing update process of intra-SGSN, in this process, SGSN has preserved about terminal information, HLR has also preserved the sign of the present residing SGSN of terminal, therefore, do not need SGSN to follow the HLR interactive information, notify the present position of HLR terminal.If purpose RNC is connected to different SGSN with original SRNC, be the process that the SRNC of inter-SGSN reshuffles so, to carry out the routing update between the inter-SGSN afterwards.Before routing update, endpoint registration is to old SGSN, and after routing update, endpoint registration is to new SGSN, Fig. 3 has shown that URA upgrades and the signaling process of the combined process that SRNC disposes, and this signaling process is applicable to that intra-SGSN SRNC reshuffles with inter-SGSN SRNC and reshuffles.

Step 301 terminal sends " URA update request " message and gives original SRNC, if current sub-district under DRNC, message sends to SRNC through DRNC.The combined process that SRNC decision whether carrying out URA upgrades and SRNC reshuffles originally.Following flow process has been described the combined process that SRNC decision carrying out URA upgrades and SRNC reshuffles, do not set up the wireless data carrying between UE and the SRNC, the data of not setting up between SRNC and the old SGSN connect (tunnel connections), do not set up old SGSN and the data between GGSN connections (tunnel connection).

The original SRNC of step 302 sends " reshuffling requirement " message and gives old SGSN, and message comprises the type of reshuffling, reason, source RNC sign, purpose RNC sign, the transparent vessel of source RNC and purpose RNC.SRNC is provided with and reshuffles type is " UE stays out of " (UEnot involved).The transparent vessel of source RNC and purpose RNC has comprised necessary information, such as following security-related information, RRC protocol information, the ability of terminal etc.

The old SGSN of step 303 by purpose RNC identify judge whether be intra-SGSN SRNC reshuffle or the SRNC of inter-SGSN reshuffles.If the SRNC of inter-SGSN reshuffles, old SGSN sends message " forwarding reconfiguration request " message and gives new SGSN, comprises the IMSI of UE in the message, the information of UE, the Tunnel Identifier of signaling, the sign of purpose RNC, the transparent vessel of RAN, the RANAP reason.

The SGSN that step 304 is new sends " reconfiguration request " message and gives purpose RNC, comprises the sign of UE in the message, the transparent vessel of source RNC and purpose RNC, the RAB that set up.The information of the RAB that sets up comprises the sign of RAB, the parameter of RAB, transport layer address and Iu transmission associating.The parameter of RAB has provided the configuration of Qos, and it is that new SGSN is reception upstream data addresses distributed that transport layer address and Iu transmission are united.Purpose RNC distributes necessary resource, comprise according to the corresponding resource of RAB parameter configuration, purpose RNC sends " response of reconfiguration request " and gives new SGSN, comprise the successful RAB information of setting up in the message, do not set up successful RAB information, each sets up successful RAB also will define a transport layer address and Iu transmission associating (Iu Transport Association), is that purpose RNC distributes, and is used for receiving descending data.After new SGSN received message, the data between purpose RNC and the new SGSN connected (tunnel connections) and have just set up successfully.Purpose RNC can receive the data of new SGSN and SRNC transmission simultaneously.

Step 305 when user plane after purpose RNC and new SGSN set up successfully, new SGSN has just carried out the preparation that SRNC reshuffles, new SGSN sends " response is reshuffled in forwarding " message and gives old SGSN, and this message indication purpose RNC has been ready to receive the downlink data that original SRNC sends.Comprise the RANAP reason in the message, the information that comprises the RAB of foundation in the message, what the transmission data were used between SRNC originally and the purpose RNC is tunnel protocol, need identify the two ends in tunnel with TEID, therefore, to each RAB that is allocated successfully, also comprise purpose RNC in the message to the TEID of RAB distribution and the IP address of RNC.For not setting up successful RAB, only comprise the NSAPI sign in the message, NSAPI can be used for identifying the resource of a RAB correspondence, and SRNC can discharge the not successful RAB of foundation.

Step 306 old SGSN sends message " reconfigure command " and gives original SRNC, comprises the RAB information that will discharge in the message, comprises the RAB information of transmitting data in the message.SRNC need transmit some data and give purpose RNC, old SGSN decision is used for transmitting the RAB of data, the information of these RAB is included in the message, the RAB information of transmission data comprises the RAB sign, transport layer address and Iu transmission associating, these addresses are the same with the address that purpose RNC sends to new SGSN, be used for receiving from SRNC and transmit the data of coming, after receiving the message of 306 steps, SRNC just can send data to purpose RNC, data forwarding is unidirectional, can only be forwarded to purpose RNC from SRNC.

The original SRNC of 307 steps will start the clock that data are transmitted to the data forwarding of purpose RNC at first.Data are transmitted by the Iu interface, and SRNC sends data by IP course purpose RNC, and simultaneously, SRNC will duplicate same data, is kept at SRNC.SRNC originally continues to send the data of duplicating and receives upstream data.Step after 307, the order of following step are not strict sequencings, and some message can be carried out simultaneously.Carrying out as purpose RNC before the role of SRNC, purpose RNC can preserve the downlink data of receiving, perhaps abandons the downlink data of receiving.

308 steps are worked as original SRNC all set, and SRNC originally can send " reshuffling execution " by the Iur interface and give purpose RNC, comprise the information of SRNS in the message.For the RAB that is strict with sequential delivery, SRNC will hang up these RAB, sends message then.In the SRNS information, for each RAB, the sequence number that comprises the GTP-PDU that the next one will send and receive, for the RAB that requires lossless PDCP, the sequence number that also comprises the PDCP that the next one will send/receive in the SRNS information, for the RAB that does not need to support lossless PDCP, do not comprise the PDCP sequence number in the SRNS information.If the Qos of RAB do not require order and send, purpose RNC does not need to use the sequence number of the GTP-PDU that the next one will send.

After 309 step purpose RNC are subjected to the message of 308 steps, send " reshuffling detection " message and give new SGSN.After " reshuffling detection " message sent, purpose RNC began to carry out the role of SRNC.

310 step purpose SRNC send " URA upgrades affirmation " message and give UE.Comprise UE information element and network information element in the message.The UE information element comprises the sign of new SRNC and the S-RNTI sign that new SRNC distributes to UE, and network information element comprises new RAI indication.After receiving this message, terminal can begin to send upstream data to new SRNC.After terminal had been reshuffled resource, terminal sent " mobile message affirmation " message and gives purpose SRNC, indicates new SRNC, and terminal has been ready to downlink data receiving.If new SGSN has received " upgrading the PDP Context response " message from GGSN, new SGSN transmits data by newly-built user plane and gives GGSN, otherwise new SGSN sends to old SGSN to upstream data.The sequence number of the SRNC of purpose and terminal switch PDCP: PDCP-SNU and PDCP-SND.PDCP-SND is the descending PDPC sequence number that the next one will be received, each radio bearer has a PDCP-SND, and PDCP-SND is the sequence number of the bag of the PDCP that terminal is received before SRNC reshuffles.After purpose SRNC obtains PDCP-SND, be PDCP-SND and packet before if purpose SRNC has preserved the sequence number that forwards from original SRNC, purpose SRNC will abandon these bags.PDCP-SNU is the sequence number of the up PDCP bag that will receive of the RNC next one, and PDCP-SNU has confirmed the upstream data correctly received before SRNC reshuffles, if purpose SRNC has preserved these data, purpose SRNC will abandon these bags.

Step 311 is worked as purpose SRNC and is received " mobile message affirmation " message, and purpose SRNC sends " reshuffle and finish " message and gives new SGSN.The purpose of this message is a purpose SRNC indication core network, and purpose SRNC has finished reconfiguration course.

Step 312 is worked as new SGSN and is received " reshuffle and finish " message, if the SRNC reconfiguration course of inter-SGSN, new SGSN sends message " forwarding is reshuffled and finished " need for old SGSN, and the indication reconfiguration course has been finished.

Step 313 is when receiving " reshuffle and finish " message, core network switches to new SRNC to user plane from original SRNC, after new SGSN receives 312 response message, new SGSN sends message and " upgrades the PDP Context request information and give GGSN; message comprises the address of new SGSN; the Tunnel Identifier that new SGSN distributes to user plane, information such as Qos information.GGSN upgrades contextual information, sends " upgrading the PDP Context response " message then and gives new SGSN, comprises the Tunnel Identifier that GGSN distributes to user plane in the message.Like this, the datum plane between GGSN and the new SGSN is set up.

Step 314 is received the message " forwarding is reshuffled and finished " of step 312 as old SGSN, old SGSN need discharge and original SRNC between the Iu interface, old SGSN sends message " Iu release command " and gives original RNC, after the clock of the data forwarding of original RNC is overtime, RNC originally sends " Iu discharges and finishes " message and gives old SGSN, and the Iu interface discharges to be finished.

Step 315 terminal has been finished the URA renewal process, if RAI that comprises in " URA upgrades affirmation " message and old RAI are inconsistent, terminal need be initiated the routing update process, as shown in Figure 2,

For the 3GPP system all has competitiveness following 10, the standardization effort of Long Term Evolution (Long Term Evolution is called for short LTE) 3GPP connecting system is being carried out in the 3GPP meeting.The purpose of LTE is to improve the ability of 3GPP system, reduces to postpone, and higher data rate is provided, and enlarges to cover.When strengthening the property, the cost that reduces system also is that LTE wants one of target that reaches.

The business of IP-based 3GPP can be switched under multiple access technology, and LTE need be supported in the seamless switching that switches under the various systems.

One of demand of the system of LTE be at idle mode terminals in the sub-district of gravity treatment different access technologies (Inter-RAT), reduce and move relevant signaling.Such as, under the present 3G network, adopt " optionally routing update process " to reduce up signaling.In LTE, hope can have similar method to make the user of idle pulley switch to the network of traditional 3G/2G from the LTE system, perhaps switch to the network of LTE from traditional 3G/2G network, can reduce the signaling of the area update of interface transmission aloft, simultaneously should consider to reduce the signaling of calling user, both are mutual restriction.

In present technology, for the demand, some solutions have been proposed,

Method one is " Do Nothing ", is feasible scheme to the single mode mobile phone.This scheme is a multimode at mobile phone, when perhaps the covering of the covering of LTE system and 3G/2G system overlaps, can not satisfy the demands.

Method two, a general SGSN, SGSN promptly supports the LTE access technology, supports the access technology of 3G/2G again, can adopt with the same method of present Common RA, but the angle from realizing needs the network node of 3G to support 2G simultaneously, 3G, the interface of LTE implements more tried out.

Method three is the RNC that change existing system, is that it promptly supports 2G/3G to support LTE again.This method has limited the structure Design of LTE.

Method four is to adopt the notion of the RA that is equal to, the RA of LTE is different RA with the RA of 2G/3G, but can be defined as the RA that is equal to one group of RA, when the user is registered on one of them RA, network in all RA has all been accepted user's log-on message, and the user can be assigned with different signs.When the user is being equal to when switching in the RA, UE does not send up signaling.The user is in the URA-PCH state under the access technology of 3G, when moving to LTE from 3G, UE is in the LTE-IDLE state, but the Iu-PS interface under the 3G network wouldn't discharge, and after the regular hour, just discharges the connection of Iu-PS.If UE returns 3G after during this period of time, UE can only be in the PMM-IDLE pattern.When new RA was not equivalent regions, UE carried out the process of common area update.The shortcoming of this method is according to the condition difference, the state difference of UE under 3G network.

Method five is that UE keeps original access technology as far as possible, has only exceeded the coverage of original access technology, and UE just uses new access technology.Restriction to UE is too many.

Because LTE is structurally just different with existing 3G system, and, many than the strictness of 3G system required for setting up delay that data connect.At present, SGSN promptly supports 3G, also supports under the situation of 2G, can adopt a definition public Routing Area to reduce terminal and switch to 3G from 2G, and perhaps 3G switches to the signaling that 3G introduces.In LTE, possible structure is that ENB adds EGGSN, and wherein, ENB is a connecting system, and EGGSN is a network node, how reducing terminal is switched introducing between different connecting systems signaling on the new structure, does not have solution in present standard.

Summary of the invention

The purpose of this invention is to provide a kind ofly in LTE, reduce the signaling of terminal when switching access module.

Another object of the present invention provides a kind of in LTE, and especially terminal reduces the signaling when switching access module under the URA-PCH state.

According to an aspect of the present invention, propose a kind of terminal that is in idle pulley is switched the signaling that causes between different access technologies method of supporting to reduce, comprise step:

1) SGSN receives the area update message that UE sends;

2) SGSN sends message for the network node of LTE;

3) network node of LTE sends message to SGSN;

4) acknowledge message is upgraded to UE in the SGSN sending zone.

According to a further aspect in the invention, propose a kind of terminal that is in idle pulley is switched the signaling that causes between different access technologies method of supporting to reduce, comprise step:

1) network node of LTE receives the area update message that UE sends,

2) network node of LTE sends message to SGSN;

3) SGSN sends message for the network node of LTE;

4) acknowledge message is upgraded to UE in the network node sending zone of LTE.

Utilize method of the present invention, can reduce terminal and carry out the signaling of access module when switching.The terminal that can make LTE remains under the URA-PCH state under the access technology of 3G.

Description of drawings

Fig. 1 is existing 3GPP system configuration;

Fig. 2 is in the present system, the process of routing region updating;

Fig. 3 is the method that existing URA-PCH user obtains the Routing Area indication;

Fig. 4 is the system configuration of the LTE that the present invention is based on;

Fig. 5 is that idle mode users is registered on the SGSN;

Fig. 6 is that idle pulley is registered on the MME;

Fig. 7 discharges the UE contextual information;

Fig. 8 is that URA-PCH user changes access technology in public Routing Area;

Fig. 9 is the block diagram of UE;

Figure 10 is the motion flow of UE;

Figure 11 is the motion flow of SRNC;

Figure 12 is the SGSN motion flow;

Figure 13 is the motion flow of MME/UPE;

Figure 14 is a schematic diagram of the present invention.

Embodiment

The present invention is based on the system configuration of Fig. 4.At present, the structure of LTE is not also decided, and therefore, the present invention adopts wherein a kind of structure as structure of the present invention.ENB is the Radio Access Network of LTE among the figure, handles with relevant signaling and the data of Radio Resource.MME/UPE among the figure (Mobility Management Entity/User Plane Entity) is the core network node among the LTE, the mobility of MME management idle mode users, UPE is responsible for receiving user's data, and initiate the node of paging, Inter AS MM is the anchor of user plane, be supported in the user plane when switching between different access technologies, between UPE and Inter ASMM, user to each LTE idle pulley, all set up the Data-carrying that to transmit acquiescence Qos data, the Qos of acquiescence is the ability of MME according to the user, the basic configuration of some services that distribute to the user, be configured in MME and the terminal of the Qos of acquiescence are preserved, and the user can use Qos configuration command transmitting and some data that do not need special service to require of acquiescence.MME and UPE can be same physical entities, and promptly MME/UPE if MME/UPE, also needs the mutual of the information of carrying out between the MME/UPE at different entities, in the present invention, is example on same physical entity with MME/UPE together.Signaling when the present invention adopts the structure of Fig. 4 to reduce idle mode users to switch between 3G access technology and LTE access technology.Between the SGSN of public Routing Area, be connected on the MME/UPE.MME/UPE is oneself being registered on the HSS, and when data were come, data directly arrived MME/UPE, and MME/UPE is data cached.Interface R3 between MME/UPE and the SGSN promptly can be the interface of signaling, also can be the interface of data.

Figure 14 is a schematic diagram of the present invention.1401, terminal moves to new Routing Area, this Routing Area is defined as the public Routing Area of 3G and LTE, terminal is known and has been moved under the new Routing Area, if terminal is under the access module of 3G, terminal sends 1401 message, the routing region updating request message is given SGSN, and SGSN obtains the contextual information of UE from old network node, and SGSN sends the network node that 1402 message " UE message transmission " is given LTE, such as, MME/UPE, MME/UPE are that UE distributes some resources under the LTE, such as sign, the Qos of acquiescence, send 1403 message " affirmation of UE message transmission " then and give SGSN, SGSN also distributes the resource of 3G to UE, such as P-TMSI, be MME/UPE that resource and the SGSN that UE distributes passes through 1404 message " routing region updating affirmation " to the resource that UE distributes then, send to UE.If UE is under the access module of LTE, UE sends 1405 message " area update request ", message name can be other, purpose is to allow MME/UPE know, UE has moved to new Routing Area at present, and this message also can comprise the contextual information of UE, perhaps MME/UPE obtains the contextual information of UE from old network node, the UE contextual information comprises the ability of UE, encrypts relevant information, and IMSI follows professional relevant information with other.MME/UPE sends 1406 message " UE message transmission " to SGSN, SGSN is the UE Resources allocation, such as P-TMSI, send 1407 message " affirmation of UE message transmission " then and give MME/UPE, MME/UPE also distributes the resource of 3G to UE, such as the Qos of acquiescence, be MME-UPE that resource and the SGSN that UE distributes passes through 1408 message " area update affirmation " to the resource that UE distributes then, send to UE.

Fig. 5 is one embodiment of the present of invention, based on the structure of Fig. 4.The UE that is in idle pulley is under the access module of 3G or LTE, moves to the shared Routing Area of 3G and LTE system definition then, and UE has selected the access technology of 3G, need be oneself being registered on the new SGSN, and new SGSN distributes new P-TMSI.MME in same public Routing Area obtains the information of UE from SGSN, and Qos according to the acquiescence of the information setting UE of UE, can also distribute a new IP address and/or long sign for UE, in public Routing Area, UE does not need to send up signaling when the technology of 3G and LTE is switched.When data arrived UPE, UPE sent beep-page message to SGSN, and sent beep-page message simultaneously in LTE.If UE will send upstream data, can directly send " service request " message, do not need at first to carry out the process of area update.

501 steps, if terminal was in the idle pulley of 3G originally, move to public Routing Area, pass through receiving broadcasting information, know and moved to a new Routing Area at present, user's transmission of idle pulley " the routing region updating request information is given new SGSN, comprises old P-TMSI in the message, old Routing Area indication (RAI); If terminal was under the access technology of LTE originally, move to public Routing Area, pass through receiving broadcasting information, know to have moved to a new Routing Area at present, and terminal is under new Routing Area, selected the access technology of 3G, terminal need be oneself being registered on the new SGSN, and the user of idle pulley sends the order of 3G, and " the routing region updating request information is given the SGSN of public Routing Area, comprises the long sign that old MME/UPE distributes to the user in the message.

502 steps, if comprise P-TMSI and old RAI in " routing region updating request ", new SGSN finds the contextual old SGSN of preservation UE according to old RAI and old P-TMSI, new SGSN sends " SGSN context request " message and gives old SGSN, requirement obtains the information of UE, old SGSN is notified to new SGSN to the contextual information of UE by response message " SGSN context response ", comprises information encrypted in the information of UE.In some cases, identical with present standard, new SGSN can initiate verification process, the verification process that verification process can adopt LTE to define, and at present, because also not definition of the verification process among the LTE, therefore, the present invention does not relate to the detailed process of authentication.If verification process is success not, SGSN wants the reject region renewal process, and the information of the UE of deletion preservation.If comprise long sign and old RAI that old MME/UPE distributes to the user in " the routing region updating request " of 501 steps, new SGSN finds the contextual old MME/UPE of preservation UE according to old RAI and old long sign, new SGSN sends " context request " message and gives old MME/UPE, message name can be other title, comprise old long sign in the message, perhaps other user's sign, the purpose of message is the contextual information that requirement obtains UE, old MME/UPE is notified to new SGSN to the contextual information of UE by response message " context response ", comprises information encrypted in the information of UE.If necessary, SGSN can initiate safety certification process.If verification process is success not, SGSN wants the reject region renewal process, and the information of the UE of deletion preservation.

503 steps, if UE has passed through safety certification, new SGSN sends message " UE context transfer " message and gives the MME/UPE that is in same public Routing Area, the message the inside comprises the context of UE, MME/UPE preserves the context of UE, ability according to UE, MME/UPE is to the service ability (i.e. the Qos of acquiescence configuration) of an acquiescence of UE configuration, MME/UPE sends " response of UE context transfer " message and gives SGSN, the message the inside comprises the Qos of acquiescence, the long sign of distributing can also be comprised,, the IP address can also be comprised in this message if UPE is responsible for the distributing IP address to UE.The Qos configuration of acquiescence is kept at MME/UPE and terminal.In this step, the data that can set up between SGSN and the MME/UPE connect, and like this, when data arrived MME/UPE, MME/UPE can use the data of having set up to connect data are sent to SGSN.

504 steps, MME/UPE initiates registration process to HSS.Comprise the sign of UE and the sign of MME/UPE in the message.

505 steps, MME sets up the acquiescence connection of UPE with inter-AS MM according to the Qos of acquiescence.

506 steps, new SGSN sends " routing region updating affirmation " message, comprises newly assigned P-TMSI in the message, the Qos of acquiescence, also comprising MME is the newly assigned long sign of UE, can also comprise the IP address in this message.UE is under the access technology of 3G, and the Qos of acquiescence and long sign are otiose, if UE switches in public Routing Area under the LTE technology, UE can use the Qos configuration and the long sign of acquiescence, does not need with the MME/UPE interactive information.

507 steps, UE sends " routing region updating is finished " message and gives SGSN.Afterwards, so UE has been assigned with new IP address, and UE can initiate the process of IMS registration.

508 steps if there are data to arrive MME/UPE, after UPE receives data, can send to SGSN to data.Can data not sent to SGSN earlier yet, send an order " paging command " and give SGSN,, again data are sent to SGSN when UPE knows under the covering of UE at SGSN.

509 steps, UPE sends beep-page message at whole public Routing Area.SGSN sends beep-page message at whole public Routing Area.

The 510a step, if UE is in the access technology of 3G at present, UE sends " service request " message and gives SGSN response as paging, comprises P-TMSI in the message.After SGSN receives page response, message " paging the stops indication " message that sends the 510b step is given MME/UPE, from this message, MME/UPE can know that SGSN has received page-response message, after receiving this message, if the paging of MME/UPE does not also stop, MME/UPE can stop paging.If in 508 steps, UPE does not send to SGSN to data, after the 510b step, UPE can give SGSN data forwarding so.

The 511a step, if UE is in the access technology of LTE at present, received beep-page message, order " service request " message that UE will send among the LTE gives MME/UPE as page-response message, message name can be other, the MME/UPE that comprises the UE preservation in the message identifies to the length that UE distributes, also comprise the Qos configuration of acquiescence, by this message and message afterwards, set up the default data path between UE and the MME/UPE, UE can initiate the IMS registration on the default data path, perhaps send IMS message.After MME/UPE receives " service request " message, MME/UPE will send " paging stops indication " message and give SGSN, from this message, SGSN can know that MME/UPE has received page-response message, receive this message after, if the paging of SGSN does not also stop, SGSN can stop paging, if SGSN has received some data, after SGSN receives " paging stops indication " message, the data of SGSN deletion buffer area.MME/UPE no longer sends data to SGSN after receiving the message of 511a.

When the user has upstream data to send, because UE has obtained SGSN and MME/UPE gives the resource of distributing, therefore, can send message according to the normal handling flow process, such as, if UE is under the access technology of 3G, can directly send " service request " message and give SGSN, do not need to resemble present standard, need at first initiate routing region updating message, could send " service request ".If UE under the access technology of LTE, has upstream data to send, can directly send " service request " message, message name can be other, the purpose of message is that request msg connects.

Fig. 6 is that the UE that is in idle pulley is under the network of 3G or LTE, moves to the shared Routing Area of 3G and LTE system definition then, and UE has selected the access technology of LTE, and UE is oneself being registered on the new MME/UPE.SGSN in same shared Routing Area obtains the information of UE from MME/UPE, and for the user distributes a P-TMSI, in public Routing Area, UE does not need to send up signaling when the technology of 3G and LTE is switched.When downlink data arrived UPE, UPE sent beep-page message to SGSN, and sent beep-page message simultaneously in LTE.If UE will send upstream data, can directly send " service request " message, do not need at first to carry out the process of area update.

601 steps, user's broadcast listening information of idle module, know the access technology of peripheral cell, the user of idle pulley carries out the measurement of minizone, the user of idle pulley moves to a new sub-district, the user has selected the access technology of LTE, user's receiving broadcasting information, obtain the sign of the new residing Routing Area in sub-district, if the sign of new Routing Area is different with the old Tracking Area Identifier that UE preserves, UE has just entered a new Routing Area, and the user of idle pulley needs transmission, and " the area update request information is given new MME/UPE.Message name can be other title, and purpose is to allow the Network records terminal move under the new zone, and this message can be incorporated in a piece of news with other message.If in old sub-district, what the user of idle pulley used is the access technology of 3G, so " comprise old P-TMSI in the area update request information, old Routing Area indication (RAI); If in old sub-district, what the user of idle pulley used is the access technology of LTE, so " comprise the long sign that old MME distributes to the user in the area update request information.

602 steps, among the LTE, when the user moves to one Routing Area, the user need to send " the area update request information,, ENB is transmitted to MME/UPE to " area update request ".MME/UPE receives message, if UE is the access technology of 3G old Routing Area use, comprise P-TMSI and old RAI in " area update request " information that MME/UPE receives, MME/UPE finds the contextual old SGSN of preservation UE according to old RAI and old P-TMSI, MME sends " SGSN context request " message for old SGSN, requirement obtains the information of UE, old SGSN is notified to MME/UPE to the contextual information of UE by response message " SGSN context response ", comprises information encrypted in the information of UE.If necessary, MME/UPE can initiate safety certification process, if not success of verification process, MME/UPE wants the reject region renewal process, the information of the UE that the MME/UPE deletion is preserved.If UE is the access technology of LTE old Routing Area use, comprise long sign and old RAI that old MME distributes to the user in " area update request " that MME/UPE receives, MME/UPE finds the contextual old MME/UPE of preservation UE according to old RAI and old long sign, MME/UPE sends " context request " message and gives old MME, message name can be other title, comprise old long sign in the message, the purpose of message is the contextual information that requirement obtains UE, old MME is notified to new MME/UPE to the contextual information of UE by response message " context response ", comprises information encrypted in the information of UE.If necessary, MME/UPE can initiate safety certification process.If verification process is success not, MME/UPE wants the reject region renewal process, the information of the UE that the MME/UPE deletion is preserved.

603 steps, if UE has passed through safety certification, new MME/UPE sends message " UE context transfer " message and gives the SGSN that is in same public Routing Area, the message the inside comprises the context of UE, SGSN preserves the context of UE, SGSN distributes P-TMSI to UE, and SGSN sends " response of UE context transfer " message and gives MME/UPE then, and the message the inside comprises P-TMSI.In this step, the data that can set up between SGSN and the MME/UPE connect, and like this, when data arrived MME/UPE, MME/UPE can use the data of having set up to connect data are sent to SGSN.

604 steps, MME/UPE initiates registration process to HSS.Comprise the sign of UE and the sign of MME/UPE in the message.

605 steps, MME/UPE sets up the acquiescence connection of UPE with inter-AS MM according to the Qos of acquiescence.

606 steps, new MME/UPE sends " area update affirmation " message, comprises newly assigned long sign in the message, the Qos of acquiescence, the IP address, may also comprise SGSN is the newly assigned P-TMSI of UE.UE is under the access technology of 3G, and P-TMSI is otiose, if UE switches under the 3G technology in by the zone at highway, UE can use P-TMSI to send and receive message, does not need to obtain P-TMSI with the MME interactive information.

607 steps, UE sends " area update is finished " message and gives MME/UPE.Afterwards, UE can initiate the process of IMS registration.

608 steps if there are data to arrive MME/UPE, after UPE receives data, can send to SGSN to data.Can data not sent to SGSN earlier yet, send an order " paging command " and give SGSN,, again data are sent to SGSN when UPE knows under the covering of UE at SGSN.

609 steps, UPE sends beep-page message at whole public Routing Area.SGSN sends beep-page message at whole public Routing Area.

The 610a step, if UE is in the access technology of 3G at present, UE sends " service request " message and gives SGSN response as paging, comprises P-TMSI in the message.After SGSN receives page response, message " paging the stops indication " message that sends the 610b step is given MME/UPE, from this message, MME/UPE can know that SGSN has received page-response message, after receiving this message, if the paging of MME/UPE does not also stop, MME/UPE can stop paging.If in 608 steps, UPE does not send to SGSN to data, after the 610b step, UPE can give SGSN data forwarding so.

The 611a step, if UE is in the access technology of LTE at present, order " service request " message that UE will send among the LTE gives MME/UPE as page-response message, message name can be other, and the MME/UPE that comprises the UE preservation in the message also comprises the Qos configuration of acquiescence to the long sign that UE distributes, by this message and message afterwards, set up the default data path between UE and the MME/UPE, UE can initiate the IMS registration on the default data path, perhaps send IMS message.After MME/UPE receives " service request " message, MME/UPE will send " paging stops indication " message and give SGSN, from this message, SGSN can know that MME/UPE has received page-response message, receive this message after, if the paging of SGSN does not also stop, SGSN can stop paging, if SGSN has received some data, after SGSN receives " paging stops indication " message, the data of SGSN deletion buffer area.MME/UPE no longer sends data to SGSN after receiving the message of 611a.

When knowing UE, MME/UPE left public Routing Area, such as, UE has left public Routing Area, has arrived new Routing Area, the node of new Routing Area can be registered on the HLR, HLR can send message to MME/UPE, requires the information of the UE of MME/UPE deletion preservation, owing to have only MME/UPE to be registered to HLR, the SGSN of public Routing Area is registration not, so MME/UPE need send message to SGSN, require the information of the UE of SGSN deletion preservation; Perhaps MME/UPE knows that the user shuts down, such as, the user sends " detach request " message at public Routing Area, and the purpose of this message is the information that UE requires the user that deletion MME/UPE preserves above.After MME/UPE knew the information that needs the deletion user, MME/UPE sent 701 message " release UE context request " message and gives SGSN, comprises the sign of UE in the message, requires SGSN to discharge this user's information.SGSN sends 702 response messages " release UE context response " message and confirms.This message also can be that SGSN initiates, be in the access technology of 3G such as UE, UE sends " detach request " message and gives SGSN, the information that requires deletion SGSN to preserve, SGSN will send 703 message and " discharge the UE context request " to MME/UPE, the sign that comprises UE in the message requires MME/UPE to discharge this user's information.MME/UPE sends 704 to answering message " release UE context response " message to confirm.

Connect in order to make the LTE terminal can set up data fast, have and propose to allow the terminal of LTE under the connecting system of 3G, remain on the URA-PCH state.If Fig. 8 has analyzed the LTE terminal under the access technology of 3G, how to reduce the signaling when access module switches.

801 steps, the sub-district of UE under non-public Routing Area, the sub-district is the access technology of 3G, the UE current state is URA-PCH.UE has entered new Routing Area.According to present standard, the indication of the Routing Area that the user of URA-PCH does not broadcast on the broadcast listening channel, but receive the indication of Routing Area by dedicated channel.Move to the scope of a new URA as URA-PCH user, the user sends " URA update request " message and gives SRNC, if the purpose sub-district is under the control of DRNC, " URA update request " message is through the forwarding of DRNC, and SRNC decision whether carrying out URA upgrades and SRNC conversion (SRNCRelocation) operation.URA upgrades and SRNC reshuffles if SRNC decides to do, and flow process is seen Fig. 3.When having received the Routing Area that comprises in " URA upgrades affirmation " message, the user indicate the RAI of RAI and UE preservation different, in this figure, new Routing Area is public Routing Area, and terminal need send the process of routing update, and the process of routing region updating is seen Fig. 5 or Fig. 6.

802 steps are that URA upgrades, the process of SRNC reconfiguration course and routing region updating, after 802 steps of Fig. 8, the information that MME/UPE in the public Routing Area and SGSN have preserved UE, and, UE has obtained the Qos and the long sign of the acquiescence that MME/UPE distributes to him, may also have the IP address, has also obtained the P-TMSI that SGSN distributes to the user.After 802 steps, if UE switches to other access module below same public Routing Area, such as, switched to the access module of LTE from the access module of 3G, because UE has obtained the long Qos configuration that identifies and give tacit consent to that MME/UPE distributes, UE can remain on the LTE idle pulley, does not need MME/UPE to carry out the mutual of information.In 803 steps, UE has switched to the access module of LTE, do not send up signaling, SRNC is in 804 steps, after the URA clock is overtime, also do not receive " URA renewal " message, if all do not receive " URA renewal " message in a N continuous cycle, N is a predetermined value, and SRNC can think that UE has switched under the technology of LTE, SRNC carries out 805 steps, and request SGSN discharges the connection of Iu interface." Iu discharges request information and gives SGSN, and the reason of release is " UE does not have activity " in the SRNC transmission.SGSN sends message " Iu discharges response " and gives RNC, and RNC can discharge the RRC connection afterwards, and deletion RNC goes up the context of the UE that preserves.If terminal is in 806 steps, terminal switches to the access technology of 3G, if follow at public Routing Area, UE changes access technology, does not send the principle of signaling, and UE advances to enter the PMM-IDLE state so, shown in Figure 80 6 steps.If also will follow the LTE terminal should remain on URA-PCH under the access technology of 3G principle, shown in Figure 80 7 steps, UE need send signaling so, and at first the RRC between foundation and the RNC connects.The process of building the RRC connection had three steps, and UE at first sends the message " RRC connection request " of 808 steps and gives RNC, comprises the sign of UE in the message, also comprises the reason of setting up RRC in the message.RNC preserves the information of UE, distributes the sign of RNC scope and cell range to UE, and to the resource that the user distributes command transmitting, then these information is told to UE by the message " RRC connects foundation " of 809 steps.The message of UE transmission 810 " RRC connects foundation to be finished " is given RNC then, comprises the sign of UE in the message, the access capability of UE, which kind of access technology the access capability indication UE of UE supports, such as the terminal of LTE, the access technology of support has the access technology of 3G, also supports the access technology of LTE.Also comprise the START value in the message, the START value is kept at usim card, with encrypting relevant parameter.

After having set up RRC and connecting, 811 rapid, UE sends the message of Non-Access Stratum, and such as " service request ", the type of service request is " acquiescence Qos ".SGSN receives message in 812 steps, preserved the default configuration of LTE terminal on the SGSN, this default configuration is that MME/UPE distributes to the user, and has been transferred to SGSN from MME/UPE in 802 steps, and the acquiescence Qos configuration transitions that SGSN distributes MME/UPE becomes oneself to be fit to the form of 3G, and be kept in the information of UE, in 812 steps, SGSN has accepted user's service request information according to the Qos configuration of preserving, in 813 steps, send " service is accepted " message and give UE.In 814 steps, SGSN sends " RAB request for allocation " message and gives SRNC, comprises service quality in the message, 815 steps, and SRNC sends response message " RAB assignment response " and gives SGSN.816 steps, SRNC needs configured radio bearer, and " RB sets up request information and gives UE, and message comprises the indication of RB, the configuration of logic channel, the configuration of transmission channel, the configuration of physical channel, and the mapping relations of interchannel to send the message of 816 steps.UE sends response message " RB sets up response " and gives RNC in 817 steps.In 818 steps, because it is the terminal of a LTE that SRNC has known UE, all there is not the activity of upstream data and downlink data when user's long period, SRNC can convert UE to the URA-PCH state, conversion need send a RRC message to UE, such as " RB reshuffles ", SRNC keeps UE at the URA-PCH state, when the user under the URA-PCH state, do not have the activity of upstream data and downlink data for a long time, SRNC does not ask to discharge Iu yet and connects, preserve UE at the URA-PCH state always, have only the URA-PCH clock of working as overtime, when also not receiving the URA update inquiry information, the SRNC request discharges the connection of Iu interface.If in 814 steps, comprise an indication in " RAB request for allocation " message, indicate this Iu interface to be acquiescence Qos configuration, in 815 steps, the RRC state that SRNC just can be provided with UE is in the URA-PCH state, in 818 steps so, SRNC just only needs to keep the URA-PCH state, only overtime at the URA-PCH clock, when also not receiving the URA update inquiry information, SRNC just asks to discharge the connection of Iu interface.

Fig. 9 is the frame diagram of terminal.The terminal of support LTE technology is supported the technology of 3G simultaneously, the square frame the inside expression on the left side, 3G system and LTE system have separately overlaps independently protocol stack, if the sub-district of terminal under the access technology of 3G, use the protocol stack of 3G system, the protocol stack of LTE is in stand-by state, if the sub-district of terminal under the access technology of LTE, use the protocol stack of LTE system, the protocol stack of 3G is in stand-by state.The sub-district of tube terminal under which kind of access technology all do not need to preserve the contextual information of UE, and obtains the information of UE from the contextual information of UE.The square frame the inside expression on the right, terminal have only a cover protocol stack, and this cover protocol stack is supported 3G and LTE technology.

Figure 10 is the action specification of UE.

UE switches to new sub-district, the access technology of at first selecting present sub-district to support, if the access technology of new sub-district is different with the access technology of old sub-district, UE need start the protocol stack of new access technology, UE receives the broadcast message of new sub-district then, comes the protocol stack of the new sub-district of initialization according to broadcast message.If new sub-district is in a new Routing Area, UE will send that " the area update request information is given network; if current sub-district is the sub-district of 3G access technology; this message sends to SGSN; comprise old P-TMSI in the message; the long sign that perhaps old MME/UPE distributes, old zone indication.UE wait for to receive response message, and when UE receives response message " area update affirmations " message, UE preserves the information that comprises in the message, sends " area update is finished " message then to network.The process of area update finishes.

Figure 11 is the action specification of SRNC, if the terminal of supporting the LTE access technology is when being in URA-PCH in traditional network (non-LTE network is such as 3G), and the action specification that the SRNC state of a control shifts

1101 when the user has data or signaling to transmit, and the state of UE is Cell-DCH or Cell-FACH state, can transmitting and receiving data.

During 1102 data send, if for some time, RNC monitors data activity or the signaling that the user does not have up-downgoing, in order to save the battery consumption of user terminal, RNC changes the user over to 1103 URA-PCH state, under 1103 URA-PCH state, 1104 steps, RNC can start the clock of a URA-PCH, and clock setting becomes a predetermined cycle, and UE initiates periodic URA renewal process according to this cycle, when clock overtime, RNC should receive " URA renewal " message that UE sends, and RNC judges in 1105 steps, if received the URA updating message, carry out 1106 steps, SRNC sends " URA upgrades affirmation " message and gives UE, and then, RNC allows the user enter the 1103URA-PCH state.If 1105 steps, SRNC does not receive " URA renewal " message, the number of times of URA updating message do not received in the RNC record, does not the RNC judgement receive that the number of times of URA updating message reaches N time 1107? N is a predetermined value, arrived predetermined period N time if having continuously, all do not receive " URA renewal " message, RNC just thinks UE in the non-service area territory, and RNC carries out 1108 steps, " the Iu interface discharges request information and gives SGSN, discharges the resource of Iu interface in transmission.SGSN can send response message, discharges the resource of Iu interface, and RNC can be the user's who preserves information deletion.If do not reach maximum times, SRNC continues to start the URA clock of 1104 steps, arrives the cycle that URA upgrades, and just prepares to receive " URA renewal " message that UE sends.

1103, the user is in the URA-PCH state, SRNC not only will detect the user and whether periodically send the URA updating message, SRNC also will monitor the data activity of UE up-downgoing, if do not carry out the activity of up-downgoing data for a long time, according to present standard, SRNC can forward state of user to idle pulley.If implemented LTE, and, allow the terminal of LTE when not having data activity, be in the URA-PCH pattern, the processing of SRNC has some differences so.In 1110 steps, if there is not the up-downgoing activity for a long time, the length of time can be to realize being correlated with, carry out 1111 steps, check the contextual information of UE, carry out the judgement of 1112 steps, terminal if not LTE, SRNC sends the message " the Iu interface discharges request " of 1108 steps and gives SGSN, requires to discharge the Iu interface, in other words, for non-LTE terminal, the release of Iu interface can be in 1107 steps, because N time is not received the URA updating message, also can be because there is not the up-downgoing activity of data for a long time; If the terminal of LTE, SRNC continues to keep the pattern of UE at URA-PCH, can just not discharge the Iu interface because of the up-downgoing activity that does not have data for a long time, can only be in 1107 steps, does not receive the URA updating message, release Iu interface N time.

For the LTE terminal, when the up-downgoing activity that does not have data for a long time, keeping the mode of user in another enforcement of URA-PCH state, is in 1103 steps, after the LTE terminal enters the URA-PCH state, SRNC checks the access capability of UE, if a terminal of supporting the LTE access technology, SRNC is provided with an indication, and indication " keeps UE at the URA-PCH state ", like this, SRNC just need not consider whether the user is transferred to idle condition.

Figure 12 is the action specification of SGSN.SGSN receives message, analyzes the type of message.If 1202 " routing region updating request information; SGSN will be according to the indication of the sign of the UE that comprises in the message (such as P-TMSI or long sign) and old Routing Area; find the old network node of preserving UE information; and carry out 1203 steps, give old network node transmission message " context request ".SGSN continues to wait for reception message in 1201 steps then, if the message that receives is 1204 steps " context response " message, the context of the UE that SGSN comprises in 1205 steps preservation message, in some cases, SGSN can initiate 1206 safety certification process, this process can be identical with present process with present execution mode, perhaps, the process of definition safety certification in LTE, the present invention can directly adopt the safety certification process of definition, and what do not make an amendment quotes usefulness, in view of the also not definition of safety certification process of present LTE, therefore, the present invention does not relate to concrete safety certification process.1207 steps, if the MME/UPE of SGSN and LTE is in same Routing Area, SGSN is sending the MME/UPE of message " UE context transfer " to same Routing Area, and purpose is to allow MME/UPE also preserve the information of a UE, and allows MME/UPE distribute some signs and resource to the user.SGSN gets back to 1201 then, waits for receiving message.If the message that receives is 1208 steps " UE context response ", this message is that the MME/UPE of same Routing Area sends, comprise the long sign that MME/UPE distributes to the user in the message, the IP address, also has the Qos configuration of acquiescence, to preserve these information, SGSN gives user's allocation identification to SGSN, these information is included in " routing region updating acknowledge message " and message is sent to UE in 1209 steps.SGSN gets back to 1201 then, waits for and receive message.If the message that receives is " routing region updating is finished ", SGSN just knows that area update procedures finishes.SGSN gets back to 1201 then, waits for and receive message.If SGSN, has received the data that MME/UPE sends in 1213 steps, perhaps SGSN receives the order " paging command " that MME/UPE sends, and SGSN sends " paging " message and gives whole Routing Area interior RNC in 1214 steps, requires RNC to initiate paging.SGSN gets back to 1201 then, waits for and receive message.If the message of receiving is 1215 page-response message, such as " service request " message that UE sends, SGSN will send " paging stops indication " message of 1216 steps and give MME/UPE, and notice MME/UPE can stop paging.Carry out 1217 steps then, SGSN begin to dispose and RNC between data connect.If the message that 1201 steps receive is 1218 steps " paging stops indication ", comprise the indication of UE in the message, such as P-TMSI, perhaps long sign, SGSN just stops the paging to this user, sends message to the RNC below the SGSN in 1219 steps, requires to stop paging, simultaneously, SGSN deletion buffer area preserve about this user's data.

Figure 13 is the action specification of MME/UPE.MME/UPE receives message, analyzes the type of message.If 1302 " routing region updating request information; MME/UPE will be according to the indication of the sign of the UE that comprises in the message (such as P-TMSI or long sign) and old Routing Area; find the old network node of preserving UE information; and carry out 1303 steps, give old network node transmission message " context request ".MME/UPE continues to wait for reception message in 1301 steps then, if the message that receives is 1304 steps " context response " message, the context of the UE that MME/UPE comprises in 1305 steps preservation message, in some cases, MME/UPE can initiate safety certification process, this process can be identical with present process with present execution mode, perhaps, the process of definition safety certification in LTE, the present invention can directly adopt the safety certification process of definition, and what do not make an amendment quotes usefulness, in view of the also not definition of safety certification process of present LTE, therefore, the present invention does not relate to concrete safety certification process.1305 steps, if the MME/UPE of LTE and SGSN are in same Routing Area, MME/UPE is sending the SGSN of message " UE context transfer " to same Routing Area, and purpose is to allow SGSN also preserve the information of a UE, and allows SGSN distribute some signs and resource to the user.MME/UPE gets back to 1301 then, waits for receiving message.If the message that receives is 1306 steps " UE context response ", this message is that the SGSN of same Routing Area sends, comprise the P-TMSI that SGSN distributes to the user in the message, MME/UPE in 1307 steps to preserve these information, MME/UPE gives the configuration of user's allocation identification and acquiescence Qos, these information are included in " routing region updating affirmation " message of 1308 steps, and message is sent to UE.MME/UPE gets back to 1301 then, waits for and receive message.If the message that receives is " routing region updating is finished ", MME/UPE just knows that area update procedures finishes.MME/UPE gets back to 1301 then, waits for and receive message.If receive packet, MME/UPE sends beep-page message to following node, and sends paging command to the SGSN under the same Routing Area.If the message that receives is 1309 steps " paging stops indication ", comprise the indication of UE in the message, such as P-TMSI, MME/UPE just stops the paging to this user, continues to transmit data to SGSN.MME/UPE gets back to 1301 then, waits for receiving message.If what receive is the page response that 1313 UE sends, MME/UPE sends " paging stops indication " message and gives same Routing Area SGSN down in 1314 steps, then MME/UPE in 1315 steps, begin to dispose and ENB between the data connection.

Claims

1. the method for the signaling that causes at the gravity treatment different access technologies of a terminal of supporting to reduce to be in idle pulley comprises step:

1) SGSN receives the area update message that UE sends;

2) SGSN sends message for the network node of LTE;

3) network node of LTE sends message to SGSN;

4) acknowledge message is upgraded to UE in the SGSN sending zone.

2. method according to claim 1 is characterized in that, also comprises step, and the network node of LTE sends registration message to HLR.

3. method according to claim 1 is characterized in that, described step 2) message that sends comprises the sign of UE.

4. method according to claim 1 is characterized in that, the message that described step 3) sends comprises the Qos configuration of the network node of LTE to the acquiescence of user's distribution.

5. method according to claim 1 is characterized in that, described step 3) sends

The network node that message comprises LTE identifies to the length that the user distributes.

6. method according to claim 1 is characterized in that, the message that described step 3) sends comprises the network node of LTE to user's IP address allocated.

7. method according to claim 1 is characterized in that, described area update acknowledge message comprises the Qos configuration of the network node of LTE to the acquiescence of user's distribution.

8. method according to claim 1 is characterized in that, the network node that described area update acknowledge message comprises LTE identifies to the length that the user distributes.

9. method according to claim 1 is characterized in that, described area update acknowledge message comprises the network node of LTE and gives user's IP address allocated.

10. method according to claim 1 is characterized in that, described area update acknowledge message comprises the P-TMSI that SGSN distributes.

11. method according to claim 1 is characterized in that also comprising, if the terminal access module is changed between 3G and LTE, does not need to send up signaling.

12. method according to claim 1 is characterized in that also comprising, if the terminal upstream data sends, the directly requested service foundation of carrying does not need to carry out earlier the process of area update.

13. the method for the signaling that a terminal of supporting to reduce to be in idle pulley causes at the gravity treatment different access technologies comprises step:

1) network node of LTE receives the area update message that UE sends,

2) network node of LTE sends message to SGSN,

3) SGSN sends message for the network node of LTE,

14. method according to claim 13 is characterized in that, also comprises step, the network node of LTE sends registration message to HLR.。

15. method according to claim 13 is characterized in that, described step 2) message that sends comprises the sign of UE.

16. method according to claim 13 is characterized in that, the message that described step 3) sends comprises the P-TMSI that SGSN distributes to the user.

17. method according to claim 13 is characterized in that, described area update acknowledge message comprises the Qos configuration of the network node of LTE to the acquiescence of user's distribution.

18. method according to claim 13 is characterized in that, the network node that described area update acknowledge message comprises LTE identifies to the length that the user distributes.

19. method according to claim 13 is characterized in that, described area update acknowledge message comprises the network node of LTE and gives user's IP address allocated.

20. method according to claim 13 is characterized in that, described area update acknowledge message comprises the P-TMSI that SGSN distributes.

21. method according to claim 13 is characterized in that also comprising, if the terminal access module is changed between 3G and LTE, does not need to send up signaling.

22. method according to claim 13 is characterized in that also comprising, if the terminal upstream data sends, the directly requested service foundation of carrying does not need to carry out earlier the process of area update.

23. according to claim 1 or 13 described methods, it is characterized in that also comprising that in paging, if SGSN has received page response, SGSN will notify the network node MME of LTE.

24. method according to claim 1 is characterized in that, if UE at the URA-PCH state, also comprises step:

If terminal in the access technology of 3G, keeps the Iu interface between RNC and the SGSN.

25. method according to claim 24 is characterized in that, has switched to the access technology of LTE when RNC judges terminal, RNC initiates Iu interface dispose procedure.

26. method according to claim 24 is characterized in that, SGSN can indicate the Iu interface to be acquiescence Qos configuration.

27. method according to claim 24 is characterized in that, it is the URA-PCH state that RNC directly is provided with state of user.