CN101015224B - Radio network control - Google Patents

Abstract

A first session is established for a first mobile access terminal (AT) on a first radio network controller (RNC) via a first radio node (RN). A first traffic channel is established between the first mobile access terminal (AT) and the first radio network controller (RNC). A first plurality of packets are sent and received over the first traffic channel. The first plurality of packets travel between a first radio node (RN) and the first radio network controller (RNC) without passing through a second radio network controller (RNC). The first traffic channel is maintained as the first access terminal moves from a coverage area of the first radio node (AT) to a coverage area of a second radio node (RN). A second plurality of packets travel between the second radio node (RN) and the first radio network controller (RNC) without passing through another radio network controller. In a radio access network, multiple radio network controllers are connected to several radio nodes using a network.

Description

Wireless network control

Technical field

The present invention relates to wireless network control.

Background technology

High Data Rate (HDR) is emerging mobile wireless access technique, it makes it possible in any position, any time is visited individual broadband internet service (referring to P.Bender, et al.; " CDMA/HDR:ABandwidth-Efficient High-Speed Wireless Data Service for Nomadic Users ", IEEE Communications Magazine, July 2000; And 3GPP2, " Draft Baseline Text for1xEV-DO, " August 21; 2000 (P.Bender etc. " CDMA (code division multiple access)/HDR: the high speed wireless data service that is used for mobile subscriber's bandwidth efficient "; IEEE (Institute of Electrical and Electric Engineers) magazine of communicating by letter, in July, 2000,3GPP2; " 1xEV-DO draw up benchmark text ", on August 21st, 2000)).HDR by Qualcomm exploitation is a kind of air interface of optimizing for the IP Packet data service, and said IP Packet data service can only be used the frequency spectrum of (1X) 1.25MHz to provide to reach each sector 2.46M bps shared forward link transmission rate.With CDMA2000 accessing wirelessly (TIA/EIA/IS-2001, " Interoperability Specification (IOS) for CDMA2000 NetworkAccess Interfaces, " May 2000 () TIA/EIA/IS-2001; " inter-operability specification of CDMA2000 network access interface (IOS) "; In May, 2000) and Wireless IP network interface (TIA/EIA/TSB-115, " Wireless IP Architecture Based on IETF Protocols, " June 6; 2000; AndTIA/EIA/IS-835, " Wireless IP Network Standard, " 3 ^RdGeneration PartnershipPr0ject 2 (3GPP2), Version 1.0, and July 14; 2000 (TIA/EIA/TSB-115, " based on the wireless IP framework of IETF agreement ", on June 6th, 2000; TIA/EIA/IS-835, " Wireless IP network standard ", third generation collaborative project 2 (3GPP2); Version 1.0; On July 14th, 2000)) compatibility, can be from the mobile access terminal (AT) to fhe global internet based on the IP technology and integral body is set up the HDR network, therefore make full use of scalability, the redundancy and low-cost of IP network.

HDR is adopted as the new standard in CDMA2000 family by TIA (telecommunications industry association); Promptly only be used for high-speed data (DO) the business evolution of current 1xRTT standard of---being called as HRPD (High Rate Packet Data) in the past---also is called as 1xEV-DO or IS-856.

Usually use and realize the IS-856 system at the radio access network framework shown in Fig. 1.At this, access terminal (AT) 10 can be desktop computer, PDA(Personal Digital Assistant), double mode voice/data mobile phone or other device, and they have built-in IS-856 and support.

The whole management service zone of accessing wirelessly provider can be divided into one or more sub-networks (or subnet) 12,14.Each subnet 12 comprises one group of radio node (RN) 16,18 and one or more radio network controller (RNC) 20,22.Said RN is connected to RNC through backhaul network 24.In existing 2G and 3G wireless network, each RN uses special leased line or ATM permanent virtual circuit (pvc) and only is connected to a RNC.And RNC uses special leased line or ATM PVC and is connected to each other.In the IP-based radio access network of a new generation, can use share I P or Metro Ethernet to realize said backhaul network, the multi-to-multi that said share I P or Metro Ethernet are supported between RN and the RNC connects.

Each RNC controls 25-100 RN usually.Each RN supports 1-4 carrier wave usually.Each carrier wave has the bandwidth of 1.25MHz.And each cell area (not shown) is divided into a plurality of sectors (3-6 usually) usually, and RN has a wireless transceiver 27 that is used for each sector.

Each RNC is connected to one or more packet data serving nodes (PDSN) 28 (referring to the TIA list of references of as above quoting) through IP network 26.RNC communicates by letter with PDSN through the standard interface that is called as R-P (packet radio) interface 30.Said R-P interface further is divided into two interfaces: the A10 interface is used to carry data; The A11 interface is used for carrier signaling.PDSN can be counted as and support ambulant edge router; It connects through the link layer that accesses network remains to AT.PDSN also is connected to the aaa server 32 of be used for discriminating, authorize and charge (AAA).

In case AT is connected to network, the then session of its foundation and RNC, and from RNC reception link layer address.Said session representes that RNC need serve all information of AT.In the IS-856 radio access network (IS-878) by the current definition of 3GPP2 in the 1xEV-DO IOS stage 1, each RN is associated with RNC uniquely, and each subnet only comprises a RNC.As a result, when AT from the overlay area of a RNC when move the overlay area of another RNC, AT switches, it comprises that session transmits.

When the AT of each dormancy passed through sub-net boundary, AT started the dormancy switching through sending UATI_Request (UATI request).AT is discerned the needs that dormancy is switched by 128 bit SectorID (sector ID) of sector broadcasting through monitoring.All sectors that belong to same subnet have the SectorID that falls in the particular range.The 128 bit general-purpose accessing terminal identifiers (UATI) that are assigned to the AT in given subnet fall in the same scope.When AT moves in the overlay area of another subnet, AT with its UATI with compared by the SectorID of its serving sector broadcasting.When these did not belong to same scope, AT knew it through sub-net boundary, and started the dormancy switching through sending UATI_Request.

First purpose that dormancy is switched is that notice PDSN sends the grouping to the arrival of that AT to new Serving RNC.The dormancy switching relates to from old Serving RNC redistributes R-P (A10) to new Serving RNC.Do not have such switching, PDSN will send to old Serving RNC and divide into groups.Because old Serving RNC is not known in the position of the outside AT of its subnet, so the grouping of AT may be lost.

Second purpose that dormancy is switched is between RNC, to transmit session information.In IS-856, each RNC preserves the special session information about AT.Such session information need send through air interface.Session information comprises general-purpose accessing terminal identifier (UATI), is used for safe key and other agreement constants that access channel is differentiated and encrypted.When AT is through RNC border (being subnet) in this case at every turn, need distribute new UATI to AT, and remaining session information need be sent to new Serving RNC from old Serving RNC.Such transmission need be between RNC network linking.Do not have such session to transmit, each switching between RNC will cause new setting up with long session, take previous air resource, and cause delay.When the area of coverage of RNC hour, the frequent generation switched in dormancy, causes excessive use air link resource (being used for new UATI distributes), RNC to be used to realize that extra process and RNC that session transmits are used to redistribute the extra process that A10 is connected with PDSN.

Summary of the invention

In one aspect, there is a kind of method.Said method comprises: with the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes explicitly, on first radio network controller, set up first session via first radio node for the first mobile access terminal.Said method also comprises: on second radio network controller, set up second session for the second mobile access terminal via second radio node, and between said first mobile access terminal and said first radio network controller, set up first Traffic Channel.Said method also comprises: send and receive more than first through first Traffic Channel and divide into groups, wherein, said more than first individual being grouped between first radio node and first radio network controller are propagated, and not through second radio network controller.Said method also comprises: when first access terminal from the overlay area of first radio node when move the overlay area of second radio node; Keep first Traffic Channel; Wherein, Individual being grouped between second radio node and first radio network controller propagated more than second, and not through another radio network controller.Said method also comprises: when first access terminal is in the resting state in the overlay area from first radio node after move the overlay area of second radio node; On second radio network controller, set up new session, perhaps carry out from first radio network controller and switch to the dormancy between RNC of second radio network controller for the first mobile access terminal.

In yet another aspect, there is a kind of method.Said method comprises:---each is implemented in said radio network controller on the hardware platform based on frame with a plurality of server cards---set up first session for the first mobile access terminal via first radio node explicitly on first radio network controller with the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes.Said method also comprises: between said first mobile access terminal and said first radio network controller, set up first Traffic Channel; Send and receive more than first through first Traffic Channel and divide into groups, wherein, said more than first individual being grouped between first radio node and first radio network controller are propagated, and not through any other radio network controller.Said method also comprises: between the second mobile access terminal and second radio network controller, set up second Traffic Channel; And send and receive more than second through second Traffic Channel and to divide into groups, wherein, said more than second are grouped between second radio node and second radio network controller and propagate, and not through any other radio network controller.Said method also comprises: when first access terminal from the overlay area of first radio node when move the overlay area of second radio node; Keep first Traffic Channel; Individual being grouped between second radio node and first radio network controller propagated more than the 3rd; And not through another radio network controller, and, the first mobile access terminal keeps first session when moving to the overlay area of second radio node.

In yet another aspect, have a kind of computer program, it visibly is included in the information carrier, and is adapted to operate in the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes.Said computer program comprises following instruction: said instruction is moved makes receiving and processing device on first radio network controller, set up first session for the first mobile access terminal via first radio node, and on second radio network controller, sets up second session for the second mobile access terminal via second radio node.Said computer program also comprises following instruction: said instruction further is caught data processing equipment by operation and between the first mobile access terminal and first radio network controller, sets up first Traffic Channel; And sending and receive more than first through first Traffic Channel divides into groups; Wherein, Said more than first individual being grouped between first radio node and first radio network controller are propagated, and not through second radio network controller.Said computer program also comprises following instruction: said instruction by further operation make data processing equipment when first access terminal from the overlay area of first radio node when move the overlay area of second radio node; Keep first Traffic Channel; Wherein, Individual being grouped between second radio node and first radio network controller propagated more than second, and not through another radio network controller.

In yet another aspect, there is a kind of mobile wireless network.Said mobile wireless network comprises first radio network controller, second radio network controller, first radio node, second radio node, the first mobile access terminal and the second mobile access terminal.The said first mobile access terminal is associated with first session of on first radio network controller, setting up via first radio node with first Traffic Channel of first radio network controller foundation.More than first grouping sent and received in the said first mobile access terminal through first Traffic Channel, and wherein, said more than first individual being grouped between first radio node and first radio network controller are propagated, and not through second radio network controller.The second mobile access terminal is associated with second session of on second radio network controller, setting up via second radio node.When first access terminal from the overlay area of first radio node when move the overlay area of second radio node, keep first Traffic Channel.Individual being grouped between second radio node and first radio network controller propagated more than second, and not through another radio network controller.

Any one other examples of said aspect can provide the one or more of following characteristic.Can between second radio node and second radio network controller, set up main related.Can between second radio node and first radio network controller, set up time association.Setting up main association can comprise: transmit PN skew and IP address information from second radio node to second radio network controller, setting up time association can comprise: transmit PN skew and IP address information from second radio node to first radio network controller.First radio node can be broadcasted first subnet identifier.Second radio node can be broadcasted second subnet identifier different with first subnet identifier.Each radio node can be disposed its subnet identifier separately independently.Said radio node all can---it has set up main related with said radio network controller---obtain its subnet identifier from its radio network controller separately.

First access terminal can be monitored subnet identifier in resting state, and trigger when the change that detects in subnet identifier that new session is set up or the RNC of dormancy from first radio network controller to second radio network controller switching.First access terminal can through send that the UATI request message triggers that new session is set up or the RNC of dormancy from first radio network controller to second radio network controller switching.

Can between the 3rd radio node and first radio network controller, set up main related.Can between the 3rd radio node and second radio network controller, set up time association.The 3rd radio node can be broadcasted the 3rd subnet identifier, and said the 3rd subnet identifier is different with first and second subnet identifiers that are associated with first and second radio nodes.Said first radio network controller can distribute new UATI to first access terminal when it is in the resting state in the overlay area from first radio node after move the overlay area of the 3rd radio node.The RNC resource control proxy can be used to store the session information by the session of one or more radio network controller services.The RNC resource control proxy can detect the fault of radio network controller; And after detecting the fault of radio network controller; Redistribute user conversation to remaining radio network controller, and transmit said session information to these remaining radio network controllers.Can the translator unit session information, it provides the enough information about first access terminal to new radio network controller, to send the message of end session.

Can use hardware platform to realize each radio network controller based on frame with a plurality of server cards.Can between second radio node and first radio network controller, set up related through one of resident service device card on first radio network controller.Can between second radio node and second radio network controller, set up related through one of resident service device card on second radio network controller.Can at each radio node and server card the signaling between---said radio node resides on this server card in the radio network controller---set up transport layer and connect, such as TCP or SCTP.Set up related can comprise from second radio node to its resident server card transmit the PN offset information.Said PN offset information can be distributed to from the server card that receives the PN offset information based on other server cards the hardware platform of frame.Handover procedure between the said RNC can meet the A13 interface of 1xEV-DO IOS standard.

The Session ID that can basis be associated with first and second access terminal in first and second radio nodes, sends access channel and divides into groups.The said Session ID that is associated with first access terminal can be based on the access terminal identification (ATI) according to the 1xEV-DO standard.The Session ID that is associated with said second access terminal can be based on the temporary transient mobile subscriber identifier (TMSI) according to the CDMA2000 standard.Said radio network controller can comprise the PDSN function.When the first transmission terminal is in the resting state in the overlay area from first radio node after move the overlay area of second radio node; Can on radio network controller, set up new session for the first mobile access terminal, the dormancy that perhaps can carry out the RNC from first radio network controller to second radio network controller is switched.First radio network controller and first radio node can be positioned at same position.Second radio network controller and second radio node can be positioned at same position.

In one aspect, the invention is characterized in a kind of method that is used for exchanging digital information at wireless network use mobile access terminal.Said method comprises: send grouping via first radio node through first Traffic Channel of between the first mobile access terminal and first radio network controller, setting up, and not through second radio network controller; And, send grouping via second radio node through second Traffic Channel of between the second mobile access terminal and second radio network controller, setting up, and not through first radio network controller.Said method is also when receiving or when first access terminal is sent grouping, maintain first Traffic Channel between first access terminal and first radio network controller via second radio node from first access terminal.Said method also comprises: send the grouping that receives from first access terminal to external network (for example internet).

Implementation can comprise the one or more of following characteristic.Said method also can comprise: carry out the effective switching (active handoff) of first Traffic Channel from first radio network controller to second radio network controller near the 3rd radio node the time detecting first access terminal.Said method also can comprise: close first Traffic Channel through first radio network controller near the 3rd radio node the time detecting first access terminal.

Said method also can comprise: on first radio network controller, set up first session for the 3rd mobile access terminal via first radio node; Remember the approximate location of the 3rd access terminal according to the location update message that sends by access terminal; Receive the grouping of going to the 3rd access terminal that is in resting state at first radio network controller; Send the message of its paging of request the 3rd access terminal to second radio network controller; And via the 3rd radio node from the said access terminal of the said second radio network controller paging.Said method also comprises: receive traffic channel request message at the 3rd radio node from the 3rd mobile access terminal through access channel; Transmit said traffic channel request message from said the 3rd radio node to said second radio network controller; Execution is from the switching of first radio network controller to first session of second radio network controller; And, after accomplishing said switching, between second radio network controller and the 3rd access terminal, set up Traffic Channel.

Radio network controller (for example first radio network controller) can comprise a plurality of server cards, and said method also can comprise: be based upon first Traffic Channel between the said radio network controller and the first mobile access terminal at a server card of from a plurality of server cards, selecting; Send the address of selected server card to first radio node from said radio network controller; Sending reverse link traffic channel from first radio node to the address of selected server card divides into groups; Send the address of selected server card to second radio node from first radio network controller; And, send reverse link traffic channel from second radio node to the address of selected server card and divide into groups.

Said first radio node can be configured to be operated on the first frequency channel, and second radio node can be positioned at same position with first radio node, and is configured to be operated on the second frequency channel.Said method also can comprise: first radio node via being operated on the first frequency channel is set up first session for the first mobile access terminal on first radio network controller; On second radio network controller, set up second session via being operated in second radio node on the second frequency channel for the second mobile access terminal; And, on first radio network controller, set up the 3rd session for the 3rd mobile access terminal via second radio node that operates on the second frequency channel.

Said method also can comprise: between first radio node and first radio network controller that are operated on the first frequency channel, set up main related; Between second radio node and first radio network controller that are operated on the second frequency channel, set up time related; First radio node via being operated on the first frequency channel is set up first session for the first mobile access terminal on first radio network controller; And, when access terminal begins to monitor second radio node, transmit said first session to second radio network controller in resting state.

Said method also can comprise: on first radio network controller, receive connection request from the first mobile access terminal via being operated in first radio node on the first frequency channel; And, on first radio network controller, set up the 3rd Traffic Channel for first access terminal, wherein, said Traffic Channel flows via being operated in second radio node on the second frequency channel.

Said method also can comprise: set up via second radio node and the 3rd mobile Traffic Channel that are operated on the second frequency channel according to the actual loading information that is received from first and second radio nodes by first radio network controller.Said method can also comprise: according to setting up in the estimation of the load on first and second radio nodes via second radio node and the 3rd mobile Traffic Channel that are operated on the second frequency channel.

First and second radio network controllers include a plurality of server cards, and said method can also comprise: handle a plurality of Traffic Channels on first server card in first radio network controller; The overload situations of detection in first server card; Be chosen in the Traffic Channel that provides on first server card to be sent to another server card; And, transmit selected Traffic Channel to another server card in one of said radio network controller, and do not abandon said Traffic Channel.

The selection of the Traffic Channel that is used to transmit can be at least in part based on the quantity of the processing resource of being used by selected Traffic Channel and/or the quality of service requirement of the business on a plurality of Traffic Channels.Confirm will the destination server card that selected Traffic Channel is sent to be based at least in part the load and the availability of other cards in the radio network controller.The destination server card can be arranged in the radio network controller identical or different with first server card.

Being arranged in central load tracker outside radio network controller or all radio network controller can provide about the information in the load of the server card of one or more radio network controllers.The central load tracker can be configured to trigger the transmission of the Traffic Channel from first server card to the destination server card.In some implementations, can directly obtain load information from other server cards by server card.

Said method can also comprise: use ip network exchange data packets between first radio network controller and first and second radio nodes.

In yet another aspect; The invention is characterized in a kind of radio access network, be used for and the mobile access terminal wireless communication that said radio access network comprises: a plurality of radio nodes; They use network (for example IP network) and interconnect with a plurality of radio network controllers; Wherein, each said radio node can each said radio network controller of addressing, and each said radio network controller can each said radio node of addressing; And the interface that is used for exchange grouping between radio access network and external network.

Implementation can comprise following one or more characteristics.Said a plurality of radio node and radio network controller can be associated with common subnet.Each radio network controller can be configured to keep Traffic Channel, no matter and said Traffic Channel just flows on which radio node.Radio network controller can divide into groups and send from access terminal to divide into groups to keep Traffic Channel through coming via any one of radio node to send to access terminal.Each radio node can be associated with the primary wireless network controller of from a plurality of radio network controllers, selecting, and each radio network controller can be enabled to send beep-page message via any radio node to access terminal.

Each radio network controller can comprise a plurality of server cards, and each is connected to network and can be by each radio node addressing.Said radio network controller can be configured on each of said a plurality of server cards, to set up the Traffic Channel with access terminal.Said radio network controller also can be configured to provide to one or more radio nodes the address of the server card of having set up Traffic Channel on it.Each radio network controller also can be configured to detect the overload situations on one of its a plurality of server cards, and one or more Traffic Channels of selecting to be handled by the card of overload are to be sent to another card.

Said a plurality of radio node can comprise two radio nodes that the position is identical, and first radio node is configured to be operated on the first frequency channel, and second radio node is configured to be operated on the second frequency channel.

Said interface can be the packet data exchanged node, perhaps can be the part of one of radio network controller.

Implementation can realize the one or more of following advantage.Through between all radio nodes and all radio network controller, setting up the main and secondary association, radio network controller has when the overlay area of access terminal from a radio node and when move the overlay area of another radio node, is used to find and the needed information of communicating by letter with any radio node in the IP backhaul.Even this allows wireless network also can carry out normal soft handover when time in access terminal the move to radio node overlay area of---its main RNC is different with that RNC that is currently serviced in access terminal---.This has been avoided the handover procedure between the more traditional RNC, the handover procedure between the said more traditional RNC by known be error-prone, and introduce the extra stand-by period.A kind of implementation of the present invention provides all above-mentioned advantages.

Description of drawings

Fig. 1-Fig. 4 shows network.

Embodiment

Comprise as above for described those the existing 3G wireless network architecture of IS-856 and be employed in the fixed relationship between RN and the RNC.In other words, all that flow or flow to RN from RN are professional through same RNC.This dormancy that requires complicated hierarchy to handle between RNC is switched, and requires (soft) between frequent and the RNC that tends to postpone to switch.When the dedicated leased-line with point-to-point is used for like Fig. 1 and 2 that graphic backhaul between RN and RNC connects, need be in Circuit-switched voice application at the fixed correlation between RN and the RNC.

In example subsequently, RNC representes directly to be attached to the radio network controller of IP network.Direct attached expression RNC can divide into groups to other nodes transmissions IP in IP network/divides into groups from other nodes receptions IP IP network, and is not higher than any intermediate treatment of IP layer.RNC can be implemented on the hardware platform based on frame, and said platform can be made up of a plurality of server cards.In this case; Whole frame can be counted as the RNC that is directly connected to IP network; And independently server card need be operated in the intermediate node (perhaps I/O server card) on the IP layer, divide into groups to send IP to other nodes in IP network/receiving IP from other nodes IP network divides into groups.In substituting implementation, can directly be attached to IP network based on the separate server card in the hardware platform of frame.In this case, said server card can have independent IP address, and therefore they can each be counted as a RNC.RNC also can be implemented on the separate server hardware, such as traditional calculating machine server or blade server (blade server).In this case, said server can be counted as RNC, and has for other RN in radio access network and the visible IP address of RNC.

IP-based radio access network framework with the signaling between the RNC

At first, as shown in Figure 3, consider the same position of one group of RNC 60 in data center and situation about linking together via the high-speed local area network (LAN) 62 such as thousand gigabit Ethernet local area network (LAN)s.In this case, RNC is connected to network via LAN interface, and router 64 is provided to the connection of external network.Such configuration can be called as RNC bunch (or pond).(how following declarative description same idea can be expanded the RNC that connects through more general IP network---such as metropolitan area network---.) past, when the main business type of carrying through wireless network was Circuit-switched voice, it was infeasible using such cluster of ethernet lan.RN can use dedicated leased-line 66 and be connected to the router in data center.Suppose that RN and RNC are that IP is addressable.In other words, by any RN of bunch service can the IP level with bunch in any other RNC direct communication.

In such as aforesaid that RNC bunch, importantly avoid in any handoff boundary between the RNC independently, so that whole bunch can be a conduct the big RNC as said bunch.This will eliminate the unnecessary switching that causes owing to moving, and improve scalability and reliability thus widely.

In order to realize this, suppose that in one example IS-856 subnet 70 is defined as RNC bunch the whole area of coverage, rather than the area of coverage of a RNC only.In other words, all RN by said bunch of service belong to same subnet now.For simplified system operation, each RN in subnet with bunch in a RNC be associated (for example leading related).When supplying power for RN first, set up this association.Below the detailed meanings that this is related will be described.

Route is got in the access channel grouping

Each sector in RN can be sent to AT through forward business or control channel 72.Similarly, the sector of each in RN can receive from AT through reverse traffic or access channel 74.Use long code mask to separate said access channel and reverse traffic channel through code division multiplexing, and use preamble to separate said control channel and forward traffic channel through time division multiplexing.Said preamble is identified as the Traffic Channel grouping that control channel divides into groups or is associated with the special MAC index with the forward link physical layer packet.The MAC index, promptly in a sector, be unique, and when Traffic Channel is set up, distributed by RN and RNC at the integer between 0 and 63.Similarly, growing code mask is that access channel divides into groups or particular traffic channel is divided into groups with the reverse link physical layer packet identification.Long code mask is based on the UATI of the AT that is used for Traffic Channel, and based on the SectorID of the serving sector of access channel.The transmission AT of access channel grouping and the reception AT that control channel divides into groups in the ATI field of MAC layer head, have been indicated.

Whenever RN receives the MAC layer when dividing into groups on one of its access channel, RN transmits said grouping to master's (or acquiescence) RNC in that RN was associated with bunch, and does not even see its content.Equally, when receiving the grouping of carrying UATI_Request message from AT, said grouping is received RN and is forwarded to main RNC.RN divides into groups said MAC layer packet encapsulation in (possible quilt with other AT MAC layer Packet Multiplexing) at IP, wherein IP address in destination equals the IP address of Serving RNC.Said IP divides into groups to be sent to the router that compiles in data center through backhaul network, and said router is forwarded to Serving RNC with said grouping through ethernet lan.

All access channels divide into groups to comprise address field, are used for identification and send AT.When sending AT by RNC distribution UATI, said address field comprises that UATI.When transmission AT did not also have UATI, said address field comprised random access terminal identifier (RATI), and it is selected by AT at random.It is UATI or RATI that preceding two bits of said address field are indicated said address.

When (Ethernet) I/O subsystem of RNC when AT receives the UATI_Request message with the address field that comprises RATI or Unidentified UATI, RNC takes on the role of Serving RNC to handle session.If RNC is implemented on the hardware platform based on frame, then it distributes said session to one of its server card.Said AT is assigned to UATI then in certain preset range.Be used for to bunch every other RNC identification service RNC this scope by bunch in all RNC know, but do not known by said AT.If RNC is implemented on the hardware platform based on frame, the scope that then belongs to the UATI of specific RNC can further be segmented to be identified in the server card in the Serving RNC of handling session.Said Serving RNC is also set up with the A10 of PDSN and is connected, so that convenient data transmission between AT and PDSN.Said A10 is connected the server card terminating of handling said session.

When dormancy, RouteUpdate (routing update) message that the AT transmission needs is to provide the information about its current location.This mobile message is stored in the mobility manager in the Serving RNC.Because subnet covers RNC bunch the whole area of coverage, therefore when AT through the time with the border between two RNC in the cluster, AT does not detect subnet to be changed, and does not therefore start the dormancy switching.But, when AT to bunch in the RN that is associated of different RNCs (acting on behalf of RNC) when sending access channel message, send the grouping of carrying that message through RN to acting on behalf of RNC.I/O subsystem in acting on behalf of RNC is checked the address field that the access channel of all arrival divides into groups, and reads UATI.From said UATI, said I/O subsystem is checked the identity of confirming Serving RNC through table, and transmits said access channel through high-speed local area network to that RNC and divide into groups.When the UATI on access channel divides into groups is received the RNC service, the said grouping of its local processing.Be implemented on the hardware platform based on frame if receive RNC, then its I/O subsystem at first confirms handling the server module (card) of said UATI (session), and uses the internal bus of Serving RNC to transmit said grouping to that card.

Route is got in paging

If receive grouped data, then transmit said grouping to the particular server card on Serving RNC through the A10 interface from the PDSN of dormancy AT.That server card is checked the positional information of that AT then.Serving RNC sends beep-page message via the one group of RN that confirms according to the last routing update message that receives from AT then.Said beep-page message is sent out via the control channel that belongs to one or more sectors of RNC bunch.The RN that sends beep-page message possibly not be associated with Serving RNC (being that they possibly have different main RNC), but they need with bunch in one of RNC be associated.

Connecting (Traffic Channel) sets up

When Serving RNC from AT directly or when acting on behalf of RNC and receive ConnectionRequest (connection request) message, it checks the pilot frequency intensity by the AT report in following the RouteUpdate message of said ConnectionRequest message.For the simplified system operation, suppose the Radio Resource of managing said RN through the Radio Resource controlled function among the RNC that is associated with at each RN.And, the RNC exchange of signaling that RN can only be associated with it.Therefore, when Serving RNC will be set up the Traffic Channel that relates to the RN that is associated with other RNC, Serving RNC at first with Radio Resource controlled function direct communication on those RNC to check Resource Availability.Such communication occurs on the high-speed lan.(Serving RNC can use look-up table to confirm the main RNC of RN).In the time can obtaining enough Radio Resources; The RNC that Serving RNC is associated with via these RN to set up necessary Traffic Channel communication link with RN, and sends TrafficChannelAssignment (traffic channel assignments) message to said AT and set up to start Traffic Channel.In case set up Traffic Channel, then divide into groups directly between RN and Serving RNC, to flow, insert and need not anyly act on behalf of RNC.The route of directly getting is like this eliminated the delay that in relating to the soft handover rules of getting route through the triangle of another RNC, takes place usually.

When new Traffic Channel relates at the outside RN of the coverage of RNC bunch (different sub-network), realize similar rules.In this case, Serving RNC is communicated by letter with the RNC of said bunch of outside to obtain Radio Resource through IP network (metropolitan area network).If can obtain Radio Resource, then Serving RNC is set up the communication link with that RN through the RNC exchange of signaling that is associated with via these RN.

This method allows Serving RNC to keep Traffic Channel, though when AT when move the overlay area of the RN that is associated with the RNC different with Serving RNC, also be like this.

The improved IP-based wireless network architecture that does not have the signaling between the RNC

Described so far scheme can improve aspect several.At first, can get routing function and eliminate the triangle that divides into groups via the access channel of acting on behalf of RNC and get route through move that to RN.This will reduce in the grouping of processing access channel, such as the delay during Traffic Channel foundation, and its cost is some increases on the processing power of RN.And, can eliminate all signalings between RNC, rather than allow RNC directly with all RN exchange of signaling in radio access network.This helps to set up the simpler network architecture, and it is easy disposing and maintenance more.

Said Radio Resource controlled function also can move to RN from RNC, further reduces thus and sets up the delay in the process in Traffic Channel.

Said said IP-based radio access network and enhancing version thereof all allow to use the flexibility of IP network and metropolitan area network; And produce the system that more distributes; Wherein, AT can keep being attached to its Serving RNC, and with its location independent, except when the distance between AT and Serving RNC when becoming excessive outside.For these abilities are provided, each RN can be associated with a plurality of RNC, might be associated with all RNC in IP-based radio access network, but at this, needn't make one of RNC as main RNC.

The triangle of avoiding access channel to divide into groups is got route

When being powered up for the first time, AT is following to the IS-856 network registry: AT obtains the IS-856 pilot tone of one of the sector by nearby broadcasting, and and system synchronization.Set up in order to start session, AT sends UATI_Request.As preceding, AT uses the ATI at random (RATI) in MAC layer head to send this request.

Said RN checks the address field that said access channel divides into groups, and discerns the UATI that the originator of said message is not assigned with, and forwards the packet to its main RNC that said RN is associated with.In order to check address field, said RN is the MAC layer extract MAC layer encapsulation segmentation from being received at first, and forms the encapsulation of MAC layer.Said RN reads in the address field in the MAC layer head then.

After receiving UATI_Request, main RNC takes on the role of Serving RNC, and distributes UATI to AT.Main RNC proceeds to remainder, particularly security key exchange and the protocol configuration that session is set up then.(below illustrate in greater detail the improvement version that is used to improve availability and these rules of better load balance are provided).RNC has realized that also the PPP/CHAP rules are to differentiate AT according to its Network Access Identifier symbol (NAI).Between the actual IMSI at NAI and terminal (international mobile subscriber identity), man-to-man mapping is arranged.This mapping is stored in AAA (Radius) the server (not shown).Said aaa server is sent to Serving RNC with the IMSI value of AT.

Acting Packet Control Function (PCF) uses this IMSI value to select as at the PDSN described in the IS-2001 standard in Serving RNC, and the A10 that is established to that PDSN connects.In the A11 registration message, the PCF function provides the IMSI value of AT and the SID/NIS/PZID identifier of itself to PDSN.Said AT and PDSN set up ppp link then, carry out simple IP or mobile IP and set up, and carry out user class and differentiate.

Each RN preserves the routing table that is used for the mapping between UATI and Serving RNC.This routing table can be provided to RN by NMS.As in previous system, each RNC has the UATI value that falls in the particular range.Whenever RN receives access channel when dividing into groups, RN is from the identity of the definite Serving RNC of the UATI value MAC layer head, and places the destination address field of IP head and grouping got be routed to that RNC through the IP address with Serving RNC.Therefore, access channel divides into groups directly to be provided to Serving RNC by any RN.The scope of the UATI value that each RNC has can directly be sent to RN by RNC, eliminates thus clearly from management system necessity to RN configuration UATI scope.

Said method requires said RN to preserve the form that is used for UATI is mapped to the IP address of RNC.Perhaps, can between all RNC, divide the UATI space, and each RNC is assigned with unique subspace, and can between the IP address of RNC and UATI subspace, sets up arithmetic relation.Said RN can be then confirms the IP address of RNC from the UATI of AT with arithmetic mode, and does not use any form.

Also possibly have hybrid plan, wherein, in RN, handle the access channel grouping with distribution mode and get route in the central member neutralization.At this, central UATI server---possibly be arranged in one of RNC---can be responsible for distributing UATI and the new session that is associated to Serving RNC.When setting up new session first, RNC can be to the new UATI of central UATI server requests.Serving RNC also can be between UATI and Serving RNC, setting up the central AC router registration of binding.When RN served AT for the first time, it can forward the packet to the UATI router, and said UATI router can be forwarded to the UATI router subsequently.Serving RNC can be carried out Binding Update with Serving RNC then, so that in all transaction subsequently, access channel divides into groups directly to be sent to Serving RNC, thereby avoids triangle to get route.

Avoid the switching between RNC

As preceding, come the mobile management of the given AT of disposed of in its entirety through Serving RNC.AT is configured in park mode, provide the position based on distance to upgrade.In other words, when the sector of serving sector and its last RouteUpdate of transmission message surpassed specific range apart, AT sent new RouteUpdate message through access channel to said serving sector.Said RouteUpdate message is forwarded to Serving RNC by RN, and therefore said Serving RNC remembers the position of AT.

When Serving RNC was wanted paging AT, Serving RNC was at first according to confirming that in the time shown in the up-to-date RouteUpdate message that receives from AT and position it will send one or more RN of paging.In this supposition, Serving RNC is known the IP address of all RN in radio access network.During initial power supply, RNC can obtain this information from NMS, perhaps when RN is associated with RNC, can directly obtain this information from RN.Serving RNC directly sends said beep-page message to the group of suitable RN.These RN come paging AT through their control channels separately then.

Their SectorID (sector ID) and subnet mask broadcasted in all sectors in the IS-856 network on their overhead channel.For less network, can subnet mask be set to 0, hint that thus whole network is a big subnet.In this case, AT never detects the subnet variation.Therefore, AT still is attached to original service RNC, and does not trigger the switching between RNC of dormancy.Connect to the A10 of PDSN also still fixing, and with the location independent of AT.

If radio access network covers geographic big zone, then move to when Serving RNC is too far away as AT, said radio access network is the switching between RNC of forced dormancy modestly.This can for example be triggered by Serving RNC when receiving RouteUpdate message from AT.Perhaps, can subnet mask be chosen as greater than 0, between RNC too far away, to introduce sub-net boundary.Then, when AT passes through sub-net boundary, dormancy taking place switch, and redistributes the A10 connection.And, distribute AT to new UATI, and transmit session parameter to new Serving RNC from old Serving RNC.

Use the Traffic Channel faster of distributed wireless resource control to set up

Explain below how between the control of RN mobile wireless resource and all RNC radio access network and RN, set up direct signaling link from RNC shortens the settling time that (in the scheme formerly) relates to the Traffic Channel of a plurality of RNC.Whenever AT sends ConnectionRequest (connection request) message when starting new Traffic Channel through access channel with RouteUpdate message, said message is forwarded to Serving RNC from receiving RN immediately.Serving RNC checks that said RouteUpdate message is to confirm being included in one group of possible sector in the active set.Serving RNC is therefore directly corresponding to the resident RN in these sectors, with requested service channel and backhaul resources.RN perhaps refuses perhaps to accept and distribute needed Radio Resource.If can obtain resource from one group of enough RN, the Serving RNC channel request of accepting business then, and send TrafficChannel (Traffic Channel) assignment messages to AT through control channel.AT begins to go up transmission at reverse traffic channel (RTC) then.In case RN has obtained RTC, then send RTCAck message obtaining with the indication rtc signal to AT.AT is then with TrafficChannelComplete (Traffic Channel completion) message response, with the completion of indicating services channel foundation.

In these rules, each RN is to the Radio Resource of controlling itself in the management of hardware resource that can obtain on the RN and the interference on its sector.As a result, between RN and Serving RNC, divide the permission controlled function.RN provides this locality of the sector of their control to allow control, and Serving RNC provides the permission control of the overall situation.Similarly, when the sector in given Traffic Channel in certain during inertia period, said sector can be through starting the rules that are used to close Traffic Channel to close Traffic Channel to the Serving RNC request of sending.Serving RNC carries out the overall situation then and determines whether to remove that sector from Traffic Channel, closes the whole service channel, does not perhaps do anything.

In case between AT and Serving RNC, set up Traffic Channel, then it keeps anchoring to Serving RNC, moves in the overlay area of other RN in IP-based radio access network even work as AT.

Subregion between RN and RNC is got route---and more detailed

When the sector in RN receives the MAC layer when dividing into groups on reverse traffic channel, said sector forwards the packet to input/output cards comprise the flow identifier of connection identifier (CID in interpolation after.Said input/output cards uses said connection identifier (CID value to search the IP address of Serving RNC.Said input/output cards then in the IP that its destination-address is set to the IP address of Serving RNC divides into groups encapsulation MAC layer divide into groups and its flow identifier.If Serving RNC is implemented on the hardware platform based on frame, then the input/output module in Serving RNC reads the UATI value to confirm to handle the server module of this session after receiving grouping.Said input/output cards is sent to that server module further to handle with said grouping with said flow identifier then.

When the sector in RN receives the grouping of MAC layer on access channel; UATI is at first read in said sector in the ATI field of MAC layer head, after interpolation comprises the SectorID of flow identifier and serving sector of the UATI that sends AT, be forwarded to input/output cards then.Said input/output cards in RN uses said UATI value to search the IP address of Serving RNC again.Said input/output cards divides into groups the MAC layer to be encapsulated in during IP that its destination-address is set to the IP address of Serving RNC divides into groups with its flow identifier.If on based on the hardware platform of frame, realize said RNC, then the input/output module in Serving RNC reads the UATI value to confirm the server module of this session of service after receiving grouping.Said input/output cards divides into groups said MAC layer to be sent to that server module further to handle with flow identifier then.

When Serving RNC has the MAC layer that is ready on forward traffic channel, send when dividing into groups, it at first search divide into groups the IP address of the RN that will be sent to.It divides into groups the MAC layer to be encapsulated in during IP that its destination-address is set to the IP address of said RN divides into groups with its flow identifier then.The SectorID value that said RN reads in after receiving grouping in the flow identifier will be sent the sector of dividing into groups with definite.Said RN divides into groups said MAC layer to be sent to suitable nextport modem card NextPort with flow identifier then, and said nextport modem card NextPort uses the MAC index to be used as preamble and dispatches the MAC layer and divide into groups on forward link, to transmit.

Similarly, on forward link, when Serving RNC has the MAC layer that sends on the control channel that is ready in particular sector when dividing into groups, Serving RNC confirm to divide into groups the IP address of the RN that will be sent to.It divides into groups the MAC layer to be encapsulated in during IP that its destination-address is set to the IP address of said RN divides into groups with its flow identifier then.Said RN reads in the SectorID value in the flow identifier after receiving grouping, to confirm the sending sector of dividing into groups.RN transmits MAC layer grouping and SectorID and MAC index to suitable nextport modem card NextPort then.Said nextport modem card NextPort schedule is to transmit on control channel.

Fault recovery and load balance

Aforesaid improved IP-based radio access network framework can be further expanded to improve the global reliability of wireless network.

The fault recovery that does not have session to keep

At first, consider each RN when being powered at first with main RNC resource control proxy---it can reside among one or more RNC or can reside in independently on computing engines or the server---means of communicating by letter.Said primary resource control agent is distributed to main RNC with each RN.Said RN please ask for all new sessions then and be routed to main RNC.

When RNC owing to certain fault becomes when being unreachable to fully, the IS-856 session that will finally identified them by all AT of that RNC service is lost.Each AT among these AT will start new session through on access channel, sending UATI_Request.Each RN that receives one of these requests gets them and is routed to its main RNC.If RN can not reach its main RNC at any time, the RN main RNC that will please look for novelty from main RNC resource control proxy immediately then.If main RNC resource control proxy also is unreachable to, then RN will send similarly request to inferior RNC resource control proxy.In case UATI_Request is received by main RNC, then main RNC will set up new IS-856 session immediately with AT, and will further start the rules that foundation is connected with the new A10 of PDSN.

The distribution of new main RNC also can be started by the RNC resource control proxy.This can accomplish through the health that makes the RNC resource control proxy monitor all RNC in subnet continuously, and when detecting the fault of RNC, the RNC resource control proxy is communicated by letter with the RN that all are affected immediately, and they are assigned to new main RNC.Distributing among the RN to main RNC, said RNC resource control proxy can be carried out load balance to guarantee that user conversation is distributed on all available RNC equably.

The load balance session distributes

Said method can be through making the RNC resource control proxy be responsible at last being further strengthened to the session of RNC distributing user.In this case, as master's (or acquiescence) RNC or when maybe RN itself receiving new UATI_Request, main RNC (perhaps RN) please distribute said session to RNC by the RNC resource control proxy.Said RNC resource control proxy comes the assign sessions to RNC according to Resource Availability, load with at RNC and the distance that is currently serviced between the RN of AT.These means provide the better load balance between RNC, allow user conversation more dynamically to be distributed on the RNC, also consider the current location of AT simultaneously.Under the situation of RNC fault, all new session requests will arrive the RNC resource control proxy, and said RNC resource control proxy will be considered to distribute these sessions to new RNC according to load and other then once more.

The RNC resource control proxy also can be used to trigger dormancy and switch to be used for load balance or other purposes.In stage 1IS-856 network, always when detecting subnet and change, trigger the switching between RNC of dormancy through AT.As stated, the dormancy switching that lacks immediately possibly cause losing paging data.

In the improved IS-856 network shown in Fig. 3 and 4; Position through network based AT starts the dormancy switching; When receiving RouteUpdate; Confirm the desired user session to the transmission of another RNC when (being used for load balance or other reasons) when Serving RNC, Serving RNC is to the RNC resource control proxy---it is to new RNC assign sessions---sends the dormancy handoff request.Said new Serving RNC distributes new UATI then, and carries out from the session of previous Serving RNC and transmit.

In the implementation that more distributes of RNC resource control proxy thought; RNC can always communicate by letter with other RNC with RN; So that routing iinformation (comprising their load) to be provided to all RN; Make RN can the conversation request that get into be got thus and be routed to correct RNC, and not through the RNC resource control proxy.For example; Each RN can have preferred RNC tabulation; And whenever it need be when RNC distributes new session, it is chosen in one of RNC in this tabulation according to certain algorithm (pseudorandom selection, circulation etc.), if the RNC in preferred tabulation will become unavailable; Then RN will detect this (can between RN and RNC, use KeepAlive message to detect the RNC fault to help RNC), and remove that RNC from its preference lists.The shortcoming of these means is in return such dynamic load result of information and to set up some backhaul signalings professional.

Has the fault recovery that session keeps

In some networks, possibly under the situation of RNC fault, recover user session information.It is crowded by the airlink that hundreds of new session request produces that this will eliminate after RNC fault short time; For preserving sessions under the situation of RNC fault, can the copy of such information (being used for all sessions at subnet) be stored in the RNC resource control proxy.

When RNC fault and AT startup new session, its new conversation request will arrive the RNC resource control proxy.Said RNC resource control proxy not only distributes new Serving RNC to each session then, and session information is provided, and avoids long session to set up rules thus.In case successfully distribute new UATI, then can recover and the communicating by letter of network to AT.The RNC resource control proxy further provides the information that is associated with the A10 interface, so that make RNC and same PDSN set up the A10 session, avoids setting up new PPP thus and moves/the simple IP session.

In the RNC based on frame, the RNC resource control proxy may operate on the specific redundant card, and has hot standby.The RNC resource control proxy is responsible for store session information then.If the server module fault, then said session is re-assigned to another server module by inside.On the principle, the operation of this system is identical with the system that on network, moves.And, in this case, needn't rebulid the A10 session of PDSN, because the outside ip address of the PCF that can keep seeing by PDSN.

Integrated RNC and PDSN

Another benefit of aforesaid IP-based radio access network framework is in the single network element, to make up RNC and PDSN function.In the 3G of layering packet data network, PDSN is illustrated in the peak in the layering, therefore can support a plurality of RNC.Hundreds of user and several RNC are supported in the PDSN expection of a new generation.

Between RN and RNC, have in the existing radio access network of link of special-purpose point-to-point; The PDSN function is moved to RNC will not expected; Because the quantity that this will reduce the session that can support causes the high switching of frequent cost between the PDSN that relates to new PPP and simple/mobile IP registration.

In said IP-based radio access network framework, less occur in the switching between the RNC, therefore allow the PDSN function is integrated among the RNC.Because can be always by effective call of same RNC service, therefore usually in the switching that does not require during the effective call between PDSN.Such means have also been simplified the networking between RNC and PDSN, and have further improved scalability and reliability.

In the RNC with integrated PDSN, the PDSN function comprises PPP termination, simple IP and/or mobile IP external agent and AAA client's function.As long as AT remains in the subnet (such as RNC bunch), then do not need the switching between the PDSN.

If integrated RNC/PDSN fault then supports all sessions (comprising interface, PPP and simple/mobile IP session) of AT to be sent to another RNC/PDSN, avoid any new session between AT and wireless network to set up thus.

Also maybe RNC/PDSN and RN is integrated.In this case, the RNC/PDSN function can with RN at same position, or even in same shell.

Should be understood that in the method described in the disclosure and can be applied to wherein RNC and PDSN or RN, RNC and PDSN are integrated or at the network of same position with being equal to.

Has main/related IP-based radio access network framework of inferior RNC

Each RN have RN association (for example set up main related) in master's (for example acquiescence) RNC, as stated.Use backhaul network 80, each RN also can be associated with one or more other RNC in IP RAN, and these RNC are called as the inferior RNC (for example setting up time association) of that RN.In order to be associated with RNC, RN provides the enough information about itself to inferior RNC, so that these RNC can communicate by letter with AT via that RN.And, in order to be supported in the signaling exchange between RN and the inferior RNC, between them, set up signaling and connect.RNC also distinguishes main RN and time RN.Main RN has main those related RN with that RNC.For example when RN powers up, can carry out time related foundation.

When RN receives access channel when dividing into groups from AT, RN is forwarded to its main RNC blindly.Dormancy AT in the overlay area of RN is by the main RNC service of that RN.In a kind of basic implementation, all RN that share same main RNC belong to same 1xEV-DO subnet.When AT passed through sub-net boundary, AT sent the UATI request to its service RN, and said service RN is forwarded to its main RNC with described request then.Because this UATI is by that RNC service, so that RNC starts according to the A13 interface that in 1xEV-DO IOS, defines and the common rules of between RNC, switching of the dormancy of old Serving RNC.New RNC also carries out A10 and switches.In a word, this method is not retained in the dormancy handoff boundary between the RNC.

Also possibly allow the RN that belongs to different 1xEV-DO subnets to share same main RNC.In this case, when AT sent the UATI request through sub-net boundary the time, said message was forwarded to the current same main RNC (because same RNC is the main RNC of the RN in two sub-net) that is serving AT.Discern it and can proceed to the UATI distribution then, and do not use A13 rules or A10 to switch at the said main RNC of this UATI of service.

When the A10 of main RNC through dormancy AT received the data of input, main RNC proceeded to paging procedure as common.Via this RNC is come to send again said beep-page message as all RN or its subnet of main RNC.

When the AT that sets up Traffic Channel from request when Serving RNC received traffic channel request message, Serving RNC was at first checked routing update message, to confirm needed pilot tone and the RN that finds these pilot tones to be positioned at.Serving RNC is these RN of contact as usually then, to set up Traffic Channel.Master/inferior association makes the PN skew of the pilot tone that RNC can be asked to the IP of RN map addresses, and uses to be connected with signaling that these RN set up in advance and set up all hand-over branch (handoff leg).In case set up effective Traffic Channel, then Serving RNC keeps grappling as the RNC of that Traffic Channel.When AT moved through the overlay area, Serving RNC used the inferior association of RN to increase or removes RN.

For example, when AT at first communicated by letter with a RN, that RN was forwarded to its main RNC (promptly a RN has main related RNC with it) with request as stated.In case set up Traffic Channel, then when AT from the overlay area of a RN when move the overlay area of the 2nd RN, main RNC keeps the Serving RNC of that whole service channel, even that the 2nd RN leads related with Serving RNC.This allows to continue not interrupt user behavior (for example call, data transmit).When AT from the overlay area of a RN when move the overlay area of the 2nd RN, AT is through sending the pilot strength information that RouteUpdate message transmits to Serving RNC the 2nd RN.In the common soft handover between the RN with identical main RNC, this transmission, AT takes place when still using a RN.When receiving RouteUpdate message; Because time association of being set up, Serving RNC can be communicated by letter with the 2nd RN, and said association comprises the information such as the IP address of the PN skew of pilot signal and RN as stated; Get in touch the 2nd RN with the permission Serving RNC, and set up communication channel.An attracting aspect of above-mentioned handover procedure is that it is worked as common soft handover.Unique difference is time association between RN and RNC, and it allows RNC and RN, and---RNC and said RN are main related---set up Traffic Channel.

Because RN always divides into groups to their main their access channel of RNC forwarding, therefore no longer need RN to carry out the access channel grouping and get route according to UATI.This has simplified the implementation of IP-based radio access network widely.

System based on frame

Aforesaid thought also can for example be used for the system based on frame through following manner: but regard each server card the RNC of IP addressing as, but perhaps each nextport modem card NextPort is regarded as the PN of IP addressing.The logical operation of system does not change.

But, in having the macroreticular of a plurality of server cards, regard each server card independently that RNC possibly cause too many RNC as, this can produce a plurality of signalings then and connect with RN and arrive the related of RNC.But a kind of mode that is used for hiding this complexity is whole frame to be regarded as the RNC of IP addressing, and uses internal agreement to handle communication in the frame.Again, can use aforesaid thought in an identical manner, and when the logical operation of RNC when the outside is seen and RN be constant.How these thoughts in following explanation in more detail influences the built-in function based on the RNC of frame if having been described.

In some above-mentioned examples, when RN is associated with its master or acquiescence RNC, between RN and RNC, sets up signaling and connect.In the system based on frame, one of server card can be responsible for carrying out said association, and the terminating signaling connects.This expression: when new RN will be associated with RNC, RN to one of (residing in) server card, subsequently, was being carried out all signalings between RNC and RN via that server card by internal distribution.In IP-based radio access network framework with the signaling between the RNC; RNC based on frame can use other RNC of layout manager discovery between the RNC; Comprise the UATI space that PN squints and their are controlled that these RN provide, layout manager can reside in system controller (SC) card between the said RNC.System controller card is communicated by letter with said server card to understand necessary information about RN to be sent to other RNC.

Use therein in some implementations based on the RNC of frame; When RN when transmitting the AC that is received based on the RNC of frame and divide into groups; Said grouping at first is transfused to/the output card intercepting; Input/output cards is checked the UATI address in AC divides into groups, and confirms the server card of that UATI of service, and is forwarded to that server card.When local service UATI, input/output cards is confirmed the particular server card of service UATI, and forwards the packet to that server card.In order to carry out such forwarding, input/output cards is preserved form, and said form arrives RNC with the UATI map addresses, and further local UATI map addresses is arrived server card.

When based on the server card among the RNC of frame when AT receives the request of setting up for Traffic Channel, server card is at first through being mapped to the PN skew that is received the IP address of RN and confirming that from RouteUpdate message its pilot tone need be used for the RN collection of active set.Said server card then with those RN exchange of signaling directly that resides on the said server card, to set up needed Traffic Channel branch.For other RN that reside on the same RNC frame, if exist, then said server card is at first confirmed a plurality of server cards that those RN are resided in.Said server contact is shared these server cards of same shell, and they get in touch RN then to set up Traffic Channel branch.For other RN that reside on other RNC frames, said these RNC of server card contact.Input/output cards in these RNC is got described request then and is routed to the server card that RN resides in.These server cards are got in touch RN then to set up needed Traffic Channel branch.

Because the direct IP communication between all RN in IP RAN and the RNC is possible, so all Traffic Channel branches directly operate between RN and the Serving RNC.When the input/output cards based on the RNC of frame receives Traffic Channel when dividing into groups, according to unique connection identifier (CID, input/output cards is forwarded to the server card of the channel of wherein managing business.

In some implementations, each server card can be assigned with the IP address, and it can provide this address to the RN of positive service business channel.RN can directly send Traffic Channel to Serving RNC then and divide into groups.Said grouping is got via input/output cards then and is routed to said server card, and does not require based on the high level of connection identifier (CID and search.

Can keep and the communicating by letter of AT based on the RNC of frame, even be in the coverage of RN as said AT, for said RN, it is not main RNC.All customer services directly flow between RN and Serving RNC, when dormancy AT passes through entire I P RAN, do not need the switching (though being possible) between the RNC, because Serving RNC can come paging AT via any RN in IP VAN.

In IP-based radio access network framework, as stated, detection (discovery) is arranged between RNC and communicate by letter via system control card with the signaling between the RNC.This framework also can produce the triangle route that access channel divides into groups when main RNC is not Serving RNC, and said grouping is got route via another input/output cards based on the RNC of frame.And the fault of RNC server card causes the fault of resident all RN above that.If whole RNC frame fault, then all main RN lose.

In the improved IP-based radio access network framework that does not have the signaling between the RNC, RN is associated with a plurality of RNC in IP RAN, and preserves and be used for the form of UATI map addresses to Serving RNC.In this means, RN can be configured subnet information, and in having the additive method of main RNC, this information can be provided by main RNC.RN also keeps being connected with the signaling of a plurality of RNC in IP RAN.All signalings stop in based on one of server card on the RNC of frame now, and one of said server card is assigned to resident that RN.RN to it resident server card the information about itself is provided, comprise its IP address.This server card is then to based on the every other server card distributing information among the RNC of frame.

In these examples, when RN receives access channel when dividing into groups from AT, RN checks the UATI address field, confirms the IP address of Serving RNC to transmit said grouping to that RNC then from its form.Based on the said grouping of input/output cards intercepting among the RNC of frame, be that access channel divides into groups with said packet identification, check the UATI address, and the server card that is routed to this AT of processing is got in said grouping.In Traffic Channel was set up, said server card was contacted directly those RN, and they reside on the said server card and set up Traffic Channel branch with request.For other RN, server card is at first confirmed other server cards that RN is resided in, and gets in touch that other server cards, and said those other server cards are got in touch said RN then to set up Traffic Channel branch.In this means, RNC can be used as the autonomous entity that does not have the communication between the RNC, except the switching of handling between the possible RNC is got the route with optimization.But, exist the communication between the card resident to handle.

Even the triangle of having eliminated between the RNC frame is got route, still, if input/output cards is passed through in all groupings---it is carried out high level and gets routing function, then can have the indirect route of getting in frame inside.The fault of server card causes the fault of resident RN above that.These RN can no longer serve any session that resides on the RNC, even still those sessions of activity on server card except the server card of fault.But when each server card in frame during as the RNC of IP addressing, such problem does not take place.In this case, divide into groups directly between RN and RNC server, to get route, and the fault of server card does not influence RN or other server cards.

In having the IP-based radio access network framework of master/inferior association, one group of RNC based on shell is connected to one group of RN via the IP backhaul network, and between all RN and all RNC, exists main and secondary related.

Each RN has main RNC based on shell, and RN is associated with it, as stated.Each RN also is associated with other RNC based on shell in IP RAN, and these are called as the inferior RNC of that RN.Said RN provides the enough information about itself to inferior RNC, so that these RNC can communicate by letter with AT via that RN.And, in order to be supported in the signaling exchange between RN and the inferior RNC, between RN and next RNC, set up signaling and connect.In each case, handle at RN with based on the association between the RNC of frame via one of server card in the RNC frame.

The access channel that is forwarded to its main RNC by RN blindly divides into groups to be transfused to/the output card intercepting, and said input/output cards is checked the UATI field, and is forwarded to the server card as that UATI of pre-treatment.Dormancy AT in the overlay area of RN is by the server card service in the main RNC of that RN.All RN that share same main RNC belong to same 1xEV-DO subnet.When AT passes through sub-net boundary; AT sends the UATI request to its service RN; Said service RN is forwarded to its main RNC with described request then; Because this UATI can't help that RNC service, therefore said I/O is forwarded to any one in its server card with described request after being stuck in and checking the UATI field.Server card can be then starts and the common rules of between RNC, switching of the dormancy of old Serving RNC according to the A13 interface of the definition in 1xEV-DO IOS, and said new server card is also carried out A10 and switched.

The RN of the 1xEV-DO subnet that also possibly allow to belong to different shares same main RNC.In this case, when AT sent the UATI request through sub-net boundary the time, said message was forwarded to the same main RNC (because same RNC is the main RNC of the RN in different sub-network) that is currently serviced in AT.Through checking the UATI address, the input/output cards in main RNC can be transmitted said grouping to the server card that is currently serviced in that UATI, and that server card can proceed UATI then and distribute, and does not carry out the A13 rules or A10 switches.

When the A10 of main RNC through dormancy AT received the data of arrival, said grouping was transfused to/the output card intercepting again, was forwarded to the server card of handling that A10 link after said I/O is stuck in and checks.Server card is proceeded paging procedure then as usually.Beep-page message is again via this RNC is sent as all RN or its subnet of main RNC.

When the AT that sets up Traffic Channel from request when server card received traffic channel request message, server card was checked routing update message confirming needed pilot tone, and finds current other server cards of handling these pilot tones.The server card of said server card contact these other, it then as RN that gets in touch usually to set up Traffic Channel.Main/inferior related server card that allows is mapped to the identifier of the server card that RN resides in the PN skew of the pilot tone of being asked, and uses the signaling of setting up in advance through these resident RN to connect and set up all hand-over branch.

Above-mentioned explanation can be further expanded improves reliability under the situation of server card fault.In some instances, when the server card fault, also lose by all user conversations of that card service.This expression user can keep in considerable time and can not arrive.The user possibly not know that he can not arrive yet.For anti-here, when setting up session for the first time, the copy of session status information is stored in the stand-alone card, in system controller card.Session information comprises variety of protocol configuration, mobility information, UATI etc.When session parameter changed, the session information on system controller card was updated.

System controller card use heartbeat signaling mechanism (heartbeat sigaling mechanism) detects the fault of server card, and any one assign sessions in remaining server card.Said new server card can be redistributed UATI, to guarantee said new server card and the connectivity of AT.In this method, only in load balance N+1 redundant configuration, using, an extra server card will guarantee to exist enough head rooms (headroom) to redistribute the session on the failed server card.

Even some of aforesaid technology are used the 1xEV-DO air-interface standard, said technology can be applicable to other CDMA and non-CDMA air interface technologies with also being equal to.In this case, link layer address (ATI) can be slightly different with the ATI that in 1xEV-DO (the for example TMSI in CDMA2000), uses, and can use other RN zones such as paging domain, PCF zone etc. to replace the 1xEV-DO subnet.

Controlling based on connection level load balance among the RNC of frame and overload

In RNC,, just then possibly influence performance by all users of said card service if the load on server card surpasses the processing and the storage capacity of said card based on frame.In order to prevent such overload, can use to connect the level load balance.

For example, use when becoming too big when handling with memory, server card can be triggered to the active session transmission of one or more connections of one or more other cards that resource wherein can use.In such load balance or overload controlling schemes, be desirably in and have some central entity in the frame, system controller card for example is to remember the independent load of each server card on frame.In some implementations, when server card became overload, server card confirmed that which connection will be sent to another card.At this, server card can use one of several standards, and the QoS that is included in the independent stream in the connection needs, connect the QoS class of always using how many processing and memory resource, user recently etc.In case server card confirms it will be sent to which connection of another server card, and then its gets in touch the point-load tracker that is associated with RNC, and request can transmit the destination server card of these connections.

When central load tracking device provides the tabulation of available server card, be similar to the handover procedure between the effective RNC that is described below, the card of overload is contacted directly one or more available server cards, transmits (perhaps switching) to start active session.

In some implementations, the point-load tracker triggers load balance on one's own initiative.For example, when the point-load tracker detected the server card that RNC balancedly is not installed, point-load was followed the tracks of entity and is sent the identity that active session transmits request and can serve the underload server card of said connection to the Overloaded Servers card.

In some implementations, in IP-based wireless network through bunch in a plurality of RNC carry out load balance.For example, for bunch in all RNC as the load tracking entity at center through remembeing the overall load of independent RNC alternately with the local load tracking device in each RNC.If point-load is followed the tracks of entity detection to the laod unbalance in the RNC of cluster, then its active session of triggering from the RNC of overload to underload RNC transmits.Bunch the center follow the tracks of among one of entity RNC in can residing in bunch, perhaps can bunch in the outside of RNC.

Can be in RNC and/or bunch in realize aforesaid load balance and overload controlling mechanism with distribution mode.For example, replace with bunch point-load that is associated and follow the tracks of an entity, bunch in RNC in local load tracking entity can directly shared each other load information.By this way, when a RNC is experiencing when overload, it can through for example get in touch other local load tracking entities with confirm bunch in the availability of other RNC confirm bunch in which RNC transmit active session.It can trigger the effective switching to available RNC then.Can use similar strategy to handle the load balance in RNC.

When the server card fault, also lost by all connections that server card is being handled, only if other positions in RNC or be useful on certain mechanism of the crucial connection state information of storage in bunch outside.In some implementations, can on the system controller card of RNC, connection state information be provided.Therefore, when the server card fault, system controller can be distributed in the Traffic Channel on the failed server card to other server cards in system.The server of charge server card is established to the Traffic Channel branch of all sectors of the said connection of service then, returns to the A10 link of PDSN, and the intiating radio link protocol, recovers the Traffic Channel operation.

Dormancy in the wireless network that part connects is switched

In IP-based wireless network, dormancy AT can be connected to network via a plurality of RNC, and irrelevant with its RN of current service.These RNC form bunch with the RN of their services.When each RN and each RNC have fully when related, such bunch is called as grid RNC bunch.In grid RNC bunch, dormancy AT can always remain to the connectivity of its Serving RNC because Serving RNC can via bunch in RN in any one RN come to communicate by letter with AT.This expression Serving RNC can paging bunch in the AT of any position, and dormancy AT can to bunch in the Serving RNC of any position send access channel message.

When RN not with bunch in each RNC related the time, said bunch be called as that part connects bunch.Part connect bunch in, if the RN of current service AT related with its Serving RNC not, then said AT possibly lose network and connect.This expression AT possibly become and can not arrive, and perhaps it may not send the connection of access channel message for example please look for novelty to its Serving RNC.Take place here for anti-, can keep internuncial another RNC to move the session of AT to AT wherein from Serving RNC.

In some implementations, will bunch in RNC and RN be subdivided into a plurality of grids bunch, and set up the 1xEV-DO sub-net boundary belonging between different bunches the RN.Then, whenever dormancy AT through bunch between sub-net boundary the time, its sends the UATI request, the dormancy that triggers between the so-called A13RNC is switched.The RN that receives UATI request is forwarded to its main RNC (perhaps one of RNC in its bunch) with it, and this RNC confirms the RNC of the session of current service AT then from UATI, and will trigger A13 dormancy switching.Bunch between therefore set up subnet and guarantee that dormancy AT always remains connected to network.

When effective AT through bunch between sub-net boundary the time, as long as Serving RNC has necessary association with to the RN distribution service channel in other bunches, then still keep connecting.Otherwise need carry out effective RNC before on the border that reaches connection switches.

In some implementations, what part connected bunch is configured to allow AT moves to does not have related RN with the Serving RNC of said AT overlay area, and said Serving RNC can not know that said AT no longer can reach.For example; The current paging domain that is sent the AT that the RouteUpdateRadius of the sector of RouteUpdate confirms by wherein said AT at last can comprise with Serving RNC there is not related RN; Therefore, when RNC received the paging data of this AT, it can not directly come paging AT via these RN; In order to handle this problem, RNC preserves the paging domain tabulation that is used for each RN that its keeps being associated with.RouteUpdateRadius through RN confirms said paging domain tabulation.The IP address of all RN in paging domain that this tabulation not only is included in RNC and is associated with, and comprise the IP address of the main RNC of the RN that it is not associated with.When Serving RNC paging receiving data, it directly sends beep-page message to RN that it was associated with, and transmits the paging request of other RN to their main RNC, their main RNC then in paging domain the RN via them come paging AT.Serving RNC is when it comprises additional information when other RNC transmit beep-page messages, is used to allow other RNC to confirm that it need send beep-page message via its which of RN.

In some implementations; Serving RNC is only via those RN---for they it be main RNC---come directly to send beep-page message; For other RN, it transmits beep-page message to their main RNC, said they main RNC then in paging domain the RN via them come paging AT.

Part connect bunch in, AT can work as it and be in when not having in the overlay area of related RN with Serving RNC to network transmission access channel message.In this case, service RN identify from the UATI field access channel divides into groups said grouping by with its not related RNC service in be forwarded to its main RNC (perhaps it select other RNC) according to load balancing algorithm.The main RNC of RN will trigger the A13 dormancy and switch before handling the access channel message that is received; Wherein, The session of AT will be sent to the main RNC of RN from Serving RNC, and said Serving RNC is taken on the role of source RNC between transfer period, and the main RNC of said RN takes on the role of Target RNC between transfer period.Said Target RNC sends the A13 request message to source RNC then from the IP address that the UATI the access channel that is received divides into groups draws source RNC.After receiving the session information of AT from source RNC, Target RNC will distribute new UATI to AT, accomplish A13 and switch, and handle the access channel message that is received then.For example, if access channel message is ConnectionRequest (connection request) message, then Target RNC will be established to the Traffic Channel branch of related RN, and will send traffic channel assignment message.Importantly, in time accomplish the A13 handover procedure before the timer expiration of Target RNC in AT, to send TCA message.

Also can be used for distributed IP-based wireless network in the method described in this part, wherein, RNC and RN function are arranged in or are integrated in same base station.

Effective switching in the wireless network that part connects

In IP-based radio access network, RNC can be not be associated with all RN in network.Therefore, Serving RNC can not be kept for the Traffic Channel of access terminal (AT) indefinitely.If AT moves in the overlay area with the unconnected RN of Serving RNC, then it will little by little be lost to the wireless connectivity of its Serving RNC.In case lost connection, then AT will attempt to rebulid new connection, start the dormancy handover procedure that aforesaid behavior triggers.A kind of mode that is used to reduce the interruption that causes by lacking association is for Serving RNC, identification AT can be better by with its sector that is not connected service in close connection prevent possible long duration before so that confirm to close connection at AT.Such behavior in advance by Serving RNC is carried out can be avoided so-called " RF drags problem ".

In order to prevent that as above described together connection from losing, can switch to another RNC that is associated with near the AT current location RN from Serving RNC.

When AT from the overlay area of a RN when move the overlay area of another RN, it sends RouteUpdate message to its Serving RNC, Serving RNC uses said message to carry out normal soft handover.Through these RouteUpdate message, Serving RNC obtains the relatively accurate estimation of AT position, and can use this information to trigger following effective RNC switching.

Each RNC can be configured the form of the main RNC that each resident RN is shown.When RNC confirmed to trigger effectively switching, it can send HandoffRequest (handoff request) message to the main RNC of service RN, switches to start.Also can in selecting the Target RNC that effectively switches, design other method.

The effective switching than the dormancy switching implements more complicacy, because in effective switching, the effective call state also needs quilt, and RNC is sent to Target RNC from the source.And, when radio link protocol (RLP) in use the time, becoming importantly, RNC moves RLP to Target RNC and handles from the source with the interruption of minimum.Exist and realize the effectively alternative of switching.For example, can before the existing RLP link of losing via old RNC, set up new RLP link via new RNC.This allows AT when switching, to receive via source RNC.In case switch to accomplish, the RLP link that then arrive source RNC can terminating, and all groupings can be mobile via Target RNC.3GPP2 is that current to be used to discern so effective switching be standardization agreement, with the interoperability between the RNC equipment that enables different manufacturers.

Also can be used for distributed IP-based wireless network in the method described in this part, wherein, RNC and RN function are arranged in or are integrated in same base station.

Multichip carrier operation in IP-based network

Another advantage of IP-based radio access network is high power capacity multichip carrier (a plurality of frequency channels) configuration; In legacy system with strict RNC border; Increase new carrier and possibly be divided in the RN that carrier #1 is upward served by RNC, so that can be by one group of RN that the position is identical of same RNC service on carrier wave #2.Coming the identical carrier of service position through same RNC is the important requirement in legacy system; Can use suitable multichip carrier load balancing algorithm so that guarantee; The multichip carrier load balance is used on available carrier distribution service channel loading equally, so that maximize overall user experience (experience).The working load balance increases the experience of packet data user, and has minimized voice user's blocking probability.As a result, when increasing new carrier, must remove some RN the RN on first carrier from their Serving RNC, so that be the RN vacating space on second carrier.This causes unnecessary service disruption.

In IP-based accessing wirelessly gets up,, therefore needn't remove any one the existing RN on first carrier from their RNC because RNC can keep related with the RN of a big group.On the contrary, can increase by the 2nd RNC, and make all existing RN be associated, still keep simultaneously their related with a RNC with it.This has been avoided any service disruption.When on second carrier, increasing more RN, these foundation are related with first and second RNC's.

When session that AT please look for novelty, service RN can be forwarded to any one among said two RNC with the session request according to load balance mechanism between a certain RNC, and perhaps, it can be forwarded to acquiescence RNC with said session.This RNC will become the Serving RNC of that session subsequently, and just serve said AT as long as AT remains in whole RNC bunch the coverage, and to monitor which carrier irrelevant with AT.And, when Traffic Channel is set up, Serving RNC can to operate in available support any one on one group of RN distribute AT.If RN to they all related RNC their load information is provided, then can realize such traffic channel assignments so that the load of balance through carrier.Therefore because may operate on the same 1xEV-DO subnet, when AT changes the carrier that it is monitoring, do not need the dormancy switching between the RNC at all RN on all carriers.

Perhaps, in having the IP-based radio access network of master/inferior association, operate in RN on first carrier and will use RNC#1 to be used as their main RNC, and the RN that operates on second carrier will use RNC#2 to be used as their main RNC.Simultaneously, all RN also have inferior related with other RNC.In this case, when new conversation request arrived first carrier, service RN was forwarded to its main RNC with it, and main RNC becomes Serving RNC then.Perhaps, when new conversation request arrived on second carrier, service RN was forwarded to next RNC with it, and said time RNC becomes Serving RNC.Again, any one RNC can be to the traffic channel assignments AT on any one carrier, so that balance is through the business load of carrier.Again, this needs RN to all RNC---main and secondary both---provides their load information.Unique shortcoming with IP-based radio access network of master/inferior association is: if AT will change the carrier that it is being monitored, the dormancy that then need carry out between the RNC is switched.AT can for example change the carrier that it is being monitored after being redirected (redirect) by its Serving RNC.Being redirected like this can take place, and for example AT is forwarded to the carrier that is equipped with better with service AT.In---one of them carrier is supported so-called 1xEV-DO standard version 0, and second carrier is supported so-called version A---, said network can be redirected to version A carrier from version 0 carrier with the version party A-subscriber at the network that mixes the x version.Being redirected so also can occur on the carrier border, and at this, the coverage of carrier can stop, and perhaps such forwarding also can occur under the situation of RN fault.If AT is lost to the RF link of the given RN on carrier #1, then it can be connected to the identical RN in position on carrier #2.Again, need the dormancy between the RNC to switch the switching of carrying out between such carrier.

Also can be used for distributed IP-based wireless network in the method described in this part, wherein, RNC and RN function are arranged in or are integrated in same base station.

The border cell paging

In IP-based wireless network, can come to reduce widely handoff boundary through forming big bunch.But big bunch formation may not be eliminated switching fully.The known problem of in dormancy is switched, seeing is to lose paging data between dormancy transfer period, and in the switching between the RNC of dormancy, AT will once only monitor a sector.AT is the monitor service RNC sector that can not arrive at the beginning, then Serving RNC paging AT no longer just.AT has been sent to after new RNC and PDSN forwarding a packet to new RNC with AT in its session now, obtains paging property again.For the paging data that prevents loss, Serving RNC can be in that it sends in the session information of new RNC and comprises any unsettled (outstanding) paging data between A13 dormancy transfer period.Serving RNC can paging AT when accomplishing A13 dormancy switching.This will guarantee that AT keeps paging property in the paging procedure between RNC of dormancy.

A plurality of embodiment of the present invention has been described.But, can understand that can under the situation that does not break away from the spirit and scope of the present invention, carry out various modifications, therefore, other embodiment are in the scope of appended claim.

Claims (22)

1. method that is used for wireless network control comprises:

With the wireless network that comprises first radio network controller, second radio network controller, first radio node and second radio node relatively,

On said first radio network controller, set up first session via said first radio node for first access terminal,

On said second radio network controller, set up second session via said second radio node for second access terminal,

Utilize said first radio node, on first Traffic Channel between said first access terminal and said first radio network controller, transmit a plurality of first and divide into groups, and said a plurality of first divide into groups without said second radio network controller,

When said first access terminal is kept said first Traffic Channel from the overlay area of said first radio node when move the overlay area of said second radio node,

Said first access terminal keeps state of activation in the arbitrary portion of the said overlay area of said second radio node when; Utilize said second radio node; On said first Traffic Channel between said first access terminal and said first radio network controller, transmitting a plurality of second divides into groups; And said a plurality of second divide into groups without said second radio network controller, and

When being in resting state in the said overlay area of said first access terminal at said second radio node; On said second radio network controller, set up new session, perhaps carry out from said first radio network controller and switch to the dormancy between RNC of said second radio network controller for said first access terminal.

2. according to the method for claim 1, also comprise:

Between said second radio node and said second radio network controller, set up main association, and between said second radio node and said first radio network controller, set up inferior related.

3. according to the method for claim 2,

Wherein, set up said main association and comprise: transmit PN skew and IP address information from said second radio node to said second radio network controller, and

Wherein, setting up said association comprises: transmit PN skew and IP address information from said second radio node to said first radio network controller.

4. according to the method for claim 1 or 2, also comprise:

Broadcast first subnet identifier through said first radio node,

Broadcast second subnet identifier different through said second radio node with said first subnet identifier,

In resting state, monitor subnet identifier through said first access terminal, and

When the variation that detects in said subnet identifier, trigger said new session and set up perhaps from of the dormancy switching between RNC of said first radio network controller to said second radio network controller.

5. according to the method for claim 4, also comprise:

Use each radio node subnet identifier separately to come to dispose independently each radio node.

6. according to the method for claim 4, also comprise:

The respective wireless network controller that sets up main association with it from it through the said second or the 3rd radio node obtains its subnet identifier.

7. according to the method for claim 4, wherein,

Triggering comprises: by said first access terminal through sending general-purpose accessing terminal identifier request message and trigger that said new session is set up or switching to the dormancy between RNC of said second radio network controller from said first radio network controller.

8. according to the method for claim 7, also comprise:

Use each radio node subnet identifier separately to come to dispose independently each radio node.

9. according to the method for claim 7, also comprise:

The respective wireless network controller that sets up main association with it from it through the said second or the 3rd radio node obtains its subnet identifier.

10. according to the method for claim 4, also comprise:

Between the 3rd radio node and said first radio network controller, set up main association,

Between said the 3rd radio node and said second radio network controller, set up time association,

Broadcast three subnet identifier different with said first and second subnet identifiers through said the 3rd radio node, wherein said first and second subnet identifiers are associated with said first and second radio nodes,

When said first radio network controller from the overlay area of said first radio node to the overlay area of said the 3rd radio node move the back it when being in the resting state; Said first radio network controller distributes new general-purpose accessing terminal identifier to said first access terminal, and

When the change that detects in said subnet identifier, trigger said new general-purpose accessing terminal identifier distribution through sending general-purpose accessing terminal identifier request message.

11. the method according to claim 10 also comprises:

Use each radio node subnet identifier separately to come to dispose independently each radio node.

12. the method according to claim 10 also comprises:

The respective wireless network controller that sets up main association with it from it through the said second or the 3rd radio node obtains its subnet identifier.

13. the method according to claim 2 also comprises,

Use the RNC resource control proxy, be used to store session information by the session of one or more radio network controllers services.

14. the method according to claim 7 also comprises:

Detect the fault of radio network controller through the RNC resource control proxy, and

When detecting the fault of radio network controller, redistribute user conversation to remaining radio network controller, and session information is sent to these remaining radio network controllers.

15. the method according to claim 1 or 2 also comprises:

Use has the hardware platform based on frame of a plurality of server cards and realizes each radio network controller.

16. the method according to claim 15 also comprises:

Through one of said server card being resided on said first radio network controller, between said second radio node and said first radio network controller, set up association, and

Through one of said server card being resided on said second radio network controller, between said second radio node and said second radio network controller, set up related.

17. according to the method for claim 16, wherein,

The foundation association comprises: from said second radio node to it resident server card transmit the PN offset information,

Said method also comprises: from the server card that receives said PN offset information to distributing said PN offset information based on other server cards the hardware platform of frame said.

18. the method according to claim 16 also comprises:

In each radio node and said radio network controller its set up the transport layer that is used for signaling between the resident server card and connect.

19. according to the method for claim 18, wherein,

The foundation association comprises: from said second radio node to it resident server card transmit the PN offset information,

Said method also comprises: from the server card that receives said PN offset information to distributing said PN offset information based on other server cards the hardware platform of frame said.

20. according to the process of claim 1 wherein,

Said handover procedure between RNC meets the A13 interface of 1xEV-DO IOS standard.

21. according to the process of claim 1 wherein,

Said radio network controller comprises the PDSN function.

22. according to the process of claim 1 wherein,

Said first radio network controller and said first radio node are positioned at same position, and

Said second radio network controller and said second radio node are positioned at same position.

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