CN1253026C

CN1253026C - Accessing method and system for wireless access system

Info

Publication number: CN1253026C
Application number: CN 03122824
Authority: CN
Inventors: 蒋纯波; 钱国良
Original assignee: Potevio Institute of Technology Co Ltd
Current assignee: Potevio Information Technology Co Ltd
Priority date: 2003-04-24
Filing date: 2003-04-24
Publication date: 2006-04-19
Anticipated expiration: 2023-04-24
Also published as: CN1540999A

Abstract

The present invention discloses an access method of a radio access network (RAN), and the radio access network is applied to UMTS and is carried through an MPLS network. The access method at least comprises: an acquiescent service RNC is designated to each NODEB when NODEB and RNC are initialized, and LSP channels between NODEB and each RNC and the LSP channels between RNC and RNC are established; RNC flow rate information in RAN is received timely; after an access request of UE is received, acquiescent service RNC is preferably used for accessing UE to RAN according to the timely received RNC flow rate information and service requests contained in the access request of UE, and if acquiescent service RNC dissatisfies requirements, then, final service RNC is selected to access UE to RAN according to the flow rate information of other RNCs. The present invention also discloses a radio access network system for realizing the access method.

Description

A kind of cut-in method of Radio Access Network and system

Technical field

The present invention relates to the network configuration of mobile communication system, be specifically related to a kind of cut-in method and system that is applied to the Radio Access Network (RAN) of universal mobile telecommunications system (UMTS).

Background technology

For UMTS, third generation partner plan (3GPP) is in the 5th version (Release 5) that proposes and version before thereof, for wireless access network system, just the logical construction of RAN has still adopted the RAN structure in GPRS (GPRS) technology of the 2.5th third-generation mobile communication system shown in Figure 1.

As can be seen from Figure 1, in present RAN, a NODE B is responsible for one or more sub-district, one or more NODE B are connected on the fixing radio network controller (RNC) by Iub interface, RNC is connected on the Serving GPRS Support Node (SGSN) of core net (CN) by the Iu interface, and a plurality of RNC interconnects by the Iur interface.A basic RAN network architecture that Here it is.

At present, the main effect of RAN is to provide the wireless access function of subscriber equipment (UE), with the data security of UE, be sent to the destination reliably, effectively, finish that simultaneously unlimited resources management (RRM), mobile management (MM), call session management (C/SM), safety management (SM) and quality of service (QOS) are managed etc.In RAN, the data that need to handle are divided into two classes, and a class is a user data, and another kind of is signaling.

Mainly contain two kinds of network entities in RAN, a kind of is NODE B, and its effect is equivalent to the base station (BS) in the second generation mobile communication system, and another kind of network entity is RNC, and its effect is equivalent to the base station controller (BSC) in the second generation mobile communication system.Wherein, the major function of NODE B is to carry out air interface ground floor (L1) to handle, and for example channel establishment sign indicating number, rate-matched and spread spectrum etc. are also carried out some basic radio resource management operations simultaneously, for example inner loop power control etc.And the major function of RNC is that RAN is managed, RRM etc. for example, and it is connected with SGSN and mobile switching centre (MSC) among the CN.

Because to the having relatively high expectations of data and signaling transmission, so the bearing technology among the RAN requires to have very strong QOS tenability in RAN.In the communication technology before the 5th version, the equipment among the RAN adopts the atm technology carrying, and in the 5th version, wherein a kind of suggestion is to adopt IP(Internet Protocol) (IP) carrying of being supported by multiprotocol label switching (mpls).The basic structure of the RAN of this employing MPLS as shown in Figure 2.

In this technology, MPLS utilizes the label of one 20 bit that all data that comprise user data and signaling are transmitted operation, tag edge router (LER) as inlet is classified to the data that receive, these data map are arrived on the label switched path (LSP), and when data arrive, add suitable label.In LSR (LSR), just carry out data forwarding, and do not analyze concrete IP packet header content according to label.LER as outlet receives peeling label after the data.LSP interface channel is wherein set up by webmaster when NODE B initialization, specifically can adopt static LSP configuration mode, also can adopt dynamic LSP configuration mode.

What present this RAN adopted is the structure of centralized control, and just a RNC is responsible for a plurality of NODE B, and in other words, the corresponding relation between NODE B and the RNC is many-to-one relation.Therefore present this RAN has following two shortcomings inevitably:

One can not be controlled the data flow.Development along with mobile communication system, the user data type is gradually to big data quantity, the development of paroxysmal IP operation, may cause the load too high of part NODE B and RNC like this, and the low excessively phenomenon of load of some NODE B and RNC in addition, thereby the unbalanced of data traffic caused.And for IP operation, the user has no idea to estimate in certain regional business demand, therefore can not carry out relative set to NODE B and RNC in advance, makes the RNC exit cause bottleneck easily.If support more user and bandwidth and unrealistic by the disposal ability that increases RNC merely, because can increase a large amount of costs to system operator like this.

Its two, poor reliability.In this centralized RAN, the load of RNC may be very heavy, and require RNC to have extreme high reliability.In case RNC breaks down or makes a mistake, the whole service area that this RNC is responsible for all will be ended service, cause very big loss to the user.Though near the RNC this moment might not have fault and load light, can not replace breaking down or wrong RNC works.

In order to solve above-mentioned two problems, the internet forum of mobile wireless (MWIF) has proposed a kind of new RAN framework, in this framework, the function that RAN will be finished is refined into some network functional entities of control plane and transport plane, and has defined the standard interface form between each network entity.In this RAN framework, but because the distributed deployment of functional entity has solved two big defectives of original centralized control.But this RAN framework is not considered and existing 3GPP operating such, when being applied to present network configuration, need carry out complex interface mapping conversion, not only in operation, bother very much, and need carry out a large amount of transformations network entities such as NODE B and RNC.Therefore this RAN framework is difficult to practical operation and application for present stage.

Summary of the invention

In view of this, an object of the present invention is to provide a kind of can control the data flows and and existing UMTS have the cut-in method of the Radio Access Network of favorable compatibility.

Another object of the present invention provides a kind of wireless access network system that is used to realize said method.

Above-mentioned purpose of the present invention is achieved by the following technical solutions:

The cut-in method of the RAN that passes through the MPLS network carrying of a kind of UMTS of being applied to comprises the steps: at least

A. be the Serving RNC that each NODE B specifies an acquiescence in advance when NODE B and RNC initialization, and set up between NODE B and each RNC and RNC and RNC LSP passage each other;

B. regularly receive the RNC flow information among the RAN;

C. after the access request that receives UE, the service request that is comprised in the access request according to RNC flow information that regularly receives and UE judges that the present flow rate of the Serving RNC of giving tacit consent to and the quality of service QOS of UE require sum whether smaller or equal to the threshold value that sets in advance, if, use the Serving RNC of acquiescence that UE is inserted RAN, otherwise execution in step d;

D. judge whether other RNC satisfies predetermined condition, if, from other RNC, select the Serving RNC that conduct is new, UE is inserted RAN; Otherwise still use the Serving RNC of acquiescence that UE is inserted RAN.

In above-mentioned cut-in method, if there is other RNC greater than 1 to satisfy predetermined condition in steps d, the RNC of the difference maximum that the present flow rate that the threshold value of selecting to set in advance deducts RNC and the QOS requirement sum of UE obtain is as new Serving RNC.

In above-mentioned cut-in method, can static set up signaling LSP passage and data LSP passage between NODE B and each RNC, static simultaneously RNC and the RNC LSP passage each other set up at step a.Perhaps, set up signaling LSP passage between NODE B and each RNC, and RNC and RNC LSP passage each other, and regularly collect the flow information of all LSR among the RAN at step b in step a static state; Determined in step c or steps d after the Serving RNC of UE that dynamically set up from NODE B to the data LSP passage this Serving RNC according to the flow information of LSR among the RAN that regularly receives, perhaps using be the dynamically data LSP passage of foundation of other UE.

In above-mentioned cut-in method, after receiving the access request of UE, step c may further include: determine whether that according to predefined constraints the service request that is comprised in will the access request according to RNC flow information that regularly receives and UE judges whether the Serving RNC of acquiescence satisfies predetermined condition, if, carry out this determining step, otherwise directly use the Serving RNC of acquiescence that UE is inserted RAN.The constraints here can perhaps not selected the Serving RNC of the UE in the predetermined amount of time for each UE is not selected.

In above-mentioned cut-in method, after steps d, may further include following steps:

E. after receiving the PDP Context change message of UE, flow information and new customer requirements according to current service RNC judge whether current service RNC satisfies predetermined conditions, if still use the Serving RNC of current service RNC, otherwise carry out next step as UE;

F. judge further whether other RNC satisfies predetermined conditions, if carry out next step, otherwise still use the Serving RNC of current service RNC as UE;

G. in satisfying other RNC of predetermined conditions, select a RNC as new Serving RNC, new Serving RNC obtains management information by the LSP passage between the RNC from original RNC, original RNC will upgrade the SGSN of result notification core net, use new RNC that UE is inserted RAN then.

In above-mentioned cut-in method, predetermined conditions is can be that the QOS that comprises in the PDP Context change message of the present flow rate of RNC and UE requires sum smaller or equal to the threshold value that sets in advance.And, may further include receive the PDP Context change message of UE at step e after: determine whether and to judge according to flow information and the new customer requirements of current service RNC whether current service RNC satisfies predetermined conditions according to predefined constraints, if, carry out this determining step, otherwise still use current Serving RNC that UE is inserted RAN.The constraints here can be for keeping RNC constant to each UE, and perhaps the Serving RNC to the UE in the predetermined amount of time remains unchanged.

In above-mentioned cut-in method, can set up the signaling LSP passage of NODE B between each RNC in step a static state, and RNC and RNC LSP passage each other, and further comprise: regularly collect the flow information of all LSR among the RAN at step b; Determined in step c or steps d after the Serving RNC of UE that dynamically setting up from NODE B to the data LSP passage this Serving RNC or use according to the flow information of LSR among the RAN that regularly receives has been the data LSP passage that other UE dynamically sets up; In step g, after selecting a RNC, dynamically set up the data LSP passage between NODE B and the new RNC or use these data LSP passage of dynamically having set up for other UE as new Serving RNC; In step g new Serving RNC obtains management information by the signaling LSP passage between RNC and the RNC from original RNC after, judge whether to also have other UE to use the data LSP passage of dynamically setting up, if, directly carrying out original RNC will upgrade the result notification network and use new RNC UE to be inserted the step of RAN, otherwise original RNC deletion data LSP passage relevant, and then carry out original RNC and will upgrade the result notification network and use new RNC UE to be inserted the step of RAN with NODE B.

Above-mentioned cut-in method may further include: if when not receiving the flow information of Serving RNC of the RNC of current service or acquiescence when regularly receiving the flow information of RNC, select a new RNC as Serving RNC UE to be inserted RAN in other RNC.

A kind of RAN system that is applied to UMTS, at least comprise by the MPLS network connect greater than 1 NODE B with greater than 1 RNC, this system further comprises a flow collector unit and a RNC updating block, wherein the flow collector unit is used for collecting the flow information of RAN RNC and LSR and notifies NODE B, the RNC updating block is used to judge whether to carry out RNC to be upgraded and is used to carry out concrete renewal and handle, each the NODE B among the RAN and more than or equal between 1 the RNC and RNC and RNC have the LSP passage each other.

In above-mentioned RAN system, the flow collector unit can be made up of traffic engineering processing module that increases on NODE B and the traffic engineering processing module that increases on RNC, wherein the traffic engineering processing module that increases on the NODE B is used for collecting the flow information of each RNC of RAN and the flow information of each LSR, the traffic engineering processing module of the last increase of RNC is used to collect the flow information of this RNC, and broadcasts this flow information in RAN.

In above-mentioned RAN system, the RNC updating block can be made up of RNC selection module that increases on NODE B and the Coordination module that increases on RNC, and the RNC selection module that wherein increases on the NODE B is used for the Serving RNC according to flow information and customer requirements selection UE; The Coordination module of the last increase of RNC is used for the switching between the processing of RNC renewal process and original RNC.

In above-mentioned RAN system, the LSP passage between NODE B and the RNC can comprise static signaling LSP passage and the data LSP passage of setting up, and also can comprise static signaling LSP passage of setting up and the data LSP passage of dynamically setting up when needing data to transmit.

From technical scheme of the present invention as can be seen, by in RAN, increasing traffic engineering processing unit and RNC updating block, change the centralized configuration of original RAN into distributed frame, a NODEB is connected by channel with a RNC no longer regularly, but can according to the loading condition of each RNC among the RAN and failure condition neatly any one RNC that satisfies condition of Dynamic Selection carry out signaling and data transmit.By this distributed RAN structure, and when practical application, regularly collect the flow information of RNC, and select the Serving RNC of UE according to the flow information of each RNC, thereby can control and flexible allocation the data traffic of whole system, solve the shortcoming that to control the data flows in the existing 3GPPR5 technology well.

And, distributed RAN of the present invention has kept the compatibility to the RAN equipment of existing UMTS, the communication port and the agreement that have just kept original RAN structure, make the present invention can be applied in the present mobile communication system easily, and do not need whole system is carried out costly transformation, have very high application power.

In addition, in this distributed RAN structure, if some RNC break down, it is the UE service that the NODE B that is connected with this RNC can select other RNC easily, be unlikely to influence the access of UE, improved the reliability of system greatly because this RNC breaks down.

The present invention can formulate different conditions according to system requirements when selecting RNC, make whole system have stronger extensibility.And the present invention can handle a large amount of bursts of traffic of UE application in the future calmly, can satisfy the demand of future communications business development fully.

Description of drawings

Fig. 1 is the basic structure schematic diagram of the RAN of existing UMTS;

Fig. 2 is the basic structure schematic diagram that adopts the RAN of MPLS carrying;

Fig. 3 is an overview flow chart of the present invention;

Fig. 4 is that the present invention adopts the overview flow chart under the dynamic configuration data LSP passage situation;

Fig. 5 is the flow chart of basic dynamic switching RNC;

Fig. 6 is the flow chart that adopts the dynamic switching RNC under the dynamic configuration data LSP passage situation.

Embodiment

The present invention is described in detail below in conjunction with the drawings and specific embodiments.

The basic structure of RAN of the present invention still adopts the RAN framework of MPLS carrying shown in Figure 2.As can be seen from Figure 2, adopt the MPLS network to connect between the RNC of RAN of the present invention and the NODE B, wherein, intermediate router is as LSR, and NODE B and RNC are as LER.NODE B and RNC comprise following two parts respectively in the framework of MPLS carrying:

Packet forward parts: be used for data interpolation or deletion label, and good LSP passage transmits with putting into foundation through the data after interpolation or the deletion tag processes.

Signalling module: be mainly used in all signalings of setting up, safeguard the LSP process according to strategy, and the distribution of Management label.

Simultaneously, efficient that inserts for the raising system and the reliability that improves system works have been used distributed network insertion among the present invention, and NODE B and RNC are except having kept original basic function, and NODE B of the present invention has also increased following two modules:

Traffic engineering processing module: main be responsible for collecting the loading condition of each RNC among the RAN and the loading condition of middle LSR, for example the bandwidth of maximum link bandwidth, maximum constrained link bandwidth, current bandwidth reserved, current use etc.

RNC selects module: the QOS requirement that information of collecting according to the traffic engineering processing module and user need, the Serving RNC of which RNC as UE selected in decision for use, and the RNC renewal process of decision in whether communicating.

Simultaneously, also increased following two modules among the RNC:

Traffic engineering processing module: the main loading condition of being responsible for collecting this RNC.

Coordination module: in the Serving RNC renewal process of NODE B, the handoff procedure between processing and the original RNC, and whether decision initiates route district (RA) renewal process of SGSN.

After in NODE B and RNC, adding above-mentioned module respectively, promptly constituted the basic framework of RAN of the present invention, but also need between RNC and NODE B, set up the LSP passage, just also needed MPLS is carried out network configuration.This configuration can be the easy configuration pattern, also can be to strengthen configuration mode.Below they are described respectively.

The easy configuration pattern: set up a pair of signaling LSP passage of static configuration between each the NODE B in RAN and each RNC in advance, this a pair of signalling path is corresponding up direction and down direction respectively.Because reliability and real-time that signaling transmits are had relatively high expectations, in LSR on the way, reserve the limit priority of adequate resources and processing and give signaling LSP passage.And, between each NODE B and each RNC, set up four pairs of data LSP passages of static configuration in advance, these four pairs of data passages are respectively in the four class QOS requirements of up direction and the corresponding UMTS of down direction.For data LSP passage, according to the pre-estimating of flow among the RAN, bandwidth that LSP reserves and the processing priority that is lower than limit priority are set.Between RNC and RNC because the delivery flow rate of signaling and data is less, therefore no longer distinguishing signaling LSP passage and data LSP passage, but directly static state is set up the LSP passage of two corresponding above-below directions of difference and down direction.Simultaneously, in order to improve the reliability of system, all LSP passages are set up the backup path in different paths respectively.

Strengthen configuration mode: the process of setting up of signaling LSP passage is identical with the easy configuration pattern under this pattern, just all set up a pair of signaling LSP passage of static configuration between the NODE of each in RAN B and each RNC in advance, this a pair of signalling path is corresponding up direction and down direction respectively.Simultaneously, for the same mode that adopts above-mentioned static foundation of the LSP passage between RNC and the RNC.Then adopt the mode of dynamic foundation for the foundation of data LSP passage, just, adopt towards the RSVP (RSVP-TE) of traffic engineering or based on tag distribution protocol (CR-LDP) signaling of constraint and set up appropriate users data LSP passage according to the requirement of traffic engineering.

The interface shape that has kept 3G R5 in the present invention, signalings all between NODE B and the RNC are transmitted in corresponding signaling LSP passage, and all user data then transmit in data LSP passage.The overall procedure of wireless network access method of the present invention at first is described with reference to figure 3 below.

In the present invention, need be in step 301, when each NODE B carried out initialization, system operator was specified the Serving RNC of the RNC of an acquiescence as the UE that connects this NODE B respectively for each NODE B.And in step 302, in advance between each NODE B and each RNC, and all RNC set up the LSP passage each other.

In step 303, after NODE B received access request from UE, whether the Serving RNC that the RNC of NODE B selects RNC load information that module regularly receives according to the traffic engineering processing module and user's QOS to require to judge acquiescence satisfied the system operator predetermined conditions.The access request process here is the process of a packet data protocol (PDP) context activation, comprises the QOS requirement of UE to this access, and it mainly is to specify bandwidth that the QOS here requires.The system operator predetermined conditions can be that the present load of RNC and the QOS of UE require the predefined load-threshold value of sum smaller or equal to RNC.If the RNC of acquiescence satisfies predetermined conditions, execution in step 307 is just used the current service RAN of the RNC of this acquiescence as UE; Otherwise execution in step 304.

In step 304, the RNC of NODE B selects RNC load information that module regularly receives according to the traffic engineering processing module and user's QOS to require to calculate a functional value, the residual capacity that for example can be other RNC deducts the difference that user QOS requires, and judges that in step 305 whether this difference is greater than zero.If these differences have the situation greater than zero, then select greater than zero RNC the RNC of a difference maximum to replace the RNC of acquiescence from these differences, as the Serving RNC of UE in step 306; Otherwise still use original acquiescence RNC as Serving RNC in step 307.

After step 306 or step 307 have been determined the current service RNC of UE, use this RNC that UE is inserted RAN in step 308.

To 308, system has finished a basic wireless network and has inserted processing by step 301.From method of the present invention as can be seen, NODE B not necessarily inserts UE by fixedly connected RNC, can not satisfy the communication quality requirement if give tacit consent to the RNC load too high, then can require in other numerous RNC, to select a load the lightest relative RNC according to the loading condition of current other each RNC and user's QOS, thereby can control flexibly the flow of whole RAN, improve the operation ability and the service quality of system greatly.

In said process, need to prove, will use the RNC load information that regularly receives in the step 303.This process is to be carried out jointly by the traffic engineering processing module that increases among traffic engineering processing module of introducing previously that increases in NODE B and the RNC.The traffic engineering processing module of RNC is responsible for collecting the flow situation of this RNC, loading condition just, and flow information is included in the link state advertisement regularly notifies all NODE B and other RNC by signalling path.The traffic engineering processing module of NODE B receives from the flow situation of each RNC collection and the loading condition of the middle LSR of collection by signalling path, these flow informations is regularly circulated a notice of to webmaster, but do not needed to broadcast these information to whole RAN.Specifically how collecting flow information as for the traffic engineering processing module of NODE B and RNC then is known technology, here repeats no more.

In addition, before whether the RNC that judges acquiescence satisfies the predetermined condition of step 303, can further use some constraintss, these constraintss can be that the RNC to each UE does not select, the Serving RNC of the UE in certain period is not selected etc.If using under the situation of these constraintss, the RNC that directly uses acquiescence is no longer carried out step 303 and subsequent step thereof as the Serving RNC of UE.The constraints here can be provided with flexibly by system operator.

Above-mentioned is an overall procedure of the present invention, in order to improve real-time and the reliability that signaling transmits, between NODE B and RNC, signaling can be transmitted by different special-purpose LSP passages with data in the present invention, just be used signaling LSP passage and data LSP passage respectively.Signaling LSP passage wherein is two stationary conduits of corresponding up direction of difference and down direction, and data LSP passage then can adopt aforementioned static configuration mode or dynamic-configuration mode.

If data LSP passage adopts the static configuration mode, the flow process among its flow process and Fig. 3 is basic identical, after having determined Serving RNC, will select a pair of suitable LSP passage as data LSP passage.

If data LSP passage adopts the dynamic-configuration mode, to have any different slightly among its flow process and Fig. 3, idiographic flow is as shown in Figure 4.Compare with flow process shown in Figure 3, increased a step 408 among Fig. 4, just NODE B need be determined to the data LSP passage of this RNC according to the LSR information of regularly collecting, just select which LSR to form data LSP passage, can specifically set up data LSP passage here according to the algorithm of tag distribution protocol (LDP) signaling by.If other UE for this NODE B has dynamically set up identical data LSP passage in advance, the suitable data LSP passage that then direct use has been set up gets final product.In step 409, NODE B inserts RAN according to step 406 or definite RNC and the step 408 established data LSP passage of step 407 with UE then.

In order to improve the fault-tolerance of system, in the present invention can also be regularly the failure condition of RNC and LSR be detected.Specifically, if when NODE B does not receive the flow of acquiescence RNC of the current service RNC of UE or appointment when regularly receiving the flow information of RNC in the network insertion process, think that promptly the current service RNC of UE breaks down, this moment, the RNC of NODE B selected module to select the Serving RNC of a RNC as UE according to certain condition from normal RNC, substituted original RNC that breaks down.The condition here can be to select the RNC of surplus resources maximum.New RNC will upgrade result notification SGSN, and NODE B uses new RNC to carry out network insertion.

If the some LSR in the network insertion process in the LSP passage break down and cause the work of whole LSP passage undesired, after the LSR of the LSR upstream with fault detects the fault of this LSR with fault, enable standby LSP passage, and reporting wrong place and reason to webmaster, communication this time then can not interrupted therefrom.

In order further to bring into play the advantage of distributed RAN, carried out further processing for the situation of UE change PDP Context in the present invention, its flow process is as shown in Figure 5.Just work as UE and changed the QOS requirement in the process of network insertion, might no longer be fit to new QOS requirement by current service RNC, can dynamically update RNC this moment under the situation of not interrupt communication, and its concrete processing procedure is as follows:

In step 501, NODE B receives the PDP Context change message from UE, and just UE has sent a new QOS requirement to network.This moment, the RNC of NODE B selected module to require to determine according to load information of regularly collecting and new QOS whether current service RNC satisfies predetermined condition in step 502.If current service RNC still satisfies predetermined condition, then execution in step 503, just do not carry out RNC and upgrade, and NODE B still carries out network insertion with the current service RNC of UE for this UE.If current service RNC can not satisfy predetermined condition this moment, then execution in step 504.

In step 504, NODE B further requires to judge whether that other RNC satisfies predetermined condition according to load information that regularly receives and new QOS, if there is other RNC to satisfy predetermined condition, and execution in

step

505 and 506 then.If other RNC does not satisfy predetermined condition, then same execution in step 503 is not just carried out RNC and is upgraded.

Predetermined condition in the

step

503 and 504 is formulated by system operator, for example can be that RNC present load and user QOS require sum less than predetermined threshold, and it mainly is bandwidth that user QOS wherein requires.

For the predetermined condition in step 503 and the step 504, except above-mentioned condition, can also on the basis of this condition, re-use some constraintss, these constraintss can be to each PDP Context keep Serving RNC constant, to each UE keep RNC constant, the Serving RNC of the UE in certain period remained unchanged etc.

In step 505, from the RNC that satisfies condition, select an optimal RNC as new Serving RNC.In step 506, new RNC obtains related administrative information in original RNC, and this operation is to be finished by the Coordination module that increases among new RNC and the original RNC.In step 507, original RNC will upgrade result notification SGSN then, and NODE B uses new RNC to carry out network insertion.

Fig. 5 is the processing procedure for fixed L SP passage, if data LSP passage is dynamically to set up, its processing is slightly different, sees Fig. 6 for details.

Compare with Fig. 5, the preceding step 601 to 605 of Fig. 6 and the corresponding steps of Fig. 5 are identical, no longer repeat here.In step 606, owing to need be established to the data LSP passage of new RNC temporarily, so NODE B is initiated to the request of setting up data LSP passage between the new RNC.In the process of setting up the LSP passage, original RNC buffer memory arrives the user data of UE, and after new LSP passage is set up, among the new RNC that the user data of buffer memory is transmitted by the signaling LSP passage between original RNC and the new RNC.If other UE for this NODE B has dynamically set up same data LSP passage in advance, then no longer need dynamically to set up again this moment, and use the data LSP passage of having set up to get final product.After dynamically having set up data LSP passage or adopted after the existing LSP passage, in step 607, new RNC obtains related administrative information from original RNC equally.Then in step 608, NODE B need judge whether to also have other UE to use original channel, if also have other UE to use original channel, and then direct execution in step 610, just original RNC will upgrade result notification SGSN, and NODE B uses new RNC to carry out network insertion.If there is not other UE to use original channel, for the consideration that economizes on resources, in step 609, original RNC deletion LSP passage relevant with this NODE B, original RNC and NODE B are released to deleted LSP passage resources reserved simultaneously, in execution in step 610, just use new RNC to carry out network insertion then.

With a kind of embodiment system and method for the present invention has been described above.In the above-described embodiments, flow collector unit and the RNC selected cell of RAN are realized by the corresponding module on NODE B and the RNC respectively, in actual conditions, those skilled in the art are readily appreciated that, if these functions can be finished equally as a self-contained unit among the RAN in these unit.Therefore be appreciated that above-mentioned just to the displaying of spirit of the present invention, rather than restriction.

Claims

1. a cut-in method that is applied to the Radio Access Network RAN that passes through the multiprotocol label switching MPLS network carrying of universal mobile telecommunications system UMTS comprises the steps: at least

A. be the Serving RNC that each NODE B specifies an acquiescence in advance when NODE B and radio network controller (RNC) initialization, and set up between NODE B and each RNC and RNC and RNC label switching path LSP passage each other;

B. regularly receive the RNC flow information among the RAN;

C. after the access request that receives user equipment (UE), the service request that is comprised in the access request according to RNC flow information that regularly receives and UE judges whether the Serving RNC of acquiescence satisfies predetermined condition, described predetermined condition is that the present flow rate of RNC and the quality of service QOS of UE require sum smaller or equal to the threshold value that sets in advance, if, use the Serving RNC of described acquiescence that UE is inserted RAN, otherwise execution in step d;

D. judge whether other RNC satisfies described predetermined condition, if, from other RNC, select the Serving RNC that conduct is new, UE is inserted RAN; Otherwise still use the Serving RNC of described acquiescence that UE is inserted RAN.

2. cut-in method according to claim 1, it is characterized in that, if there is other RNC greater than 1 to satisfy described predetermined condition in steps d, the RNC of the difference maximum that the present flow rate that the threshold value of selecting to set in advance deducts RNC and the QOS requirement sum of UE obtain is as new Serving RNC.

3. cut-in method according to claim 1 is characterized in that, sets up signaling LSP passage and data LSP passage between NODEB and each RNC in step a static state, static simultaneously RNC and the RNC LSP passage each other set up.

4. cut-in method according to claim 1 is characterized in that, sets up signaling LSP passage between NODEB and each RNC in step a static state, and RNC and RNC LSP passage each other, and described method further comprises:

Regularly collect the flow information of all LSR LSR among the RAN at step b;

Determined in step c or steps d after the Serving RNC of UE that dynamically set up from NODE B to the data LSP passage this Serving RNC according to the flow information of LSR among the RAN that regularly receives, perhaps using be the dynamically data LSP passage of foundation of other UE.

5. cut-in method according to claim 1 is characterized in that, this method further comprises receive the access request of UE at step c after:

Determine whether that according to predefined constraints the service request that is comprised in will the access request according to RNC flow information that regularly receives and UE judges whether the Serving RNC of acquiescence satisfies predetermined condition, if, carry out described determining step, otherwise directly use the Serving RNC of acquiescence that UE is inserted RAN.

6. cut-in method according to claim 5 is characterized in that, described constraints is not perhaps selected the Serving RNC of the UE in the predetermined amount of time for each UE is not selected.

7. cut-in method according to claim 1 is characterized in that, further comprises the steps: after steps d

E. after receiving the packet data protocol PDP Context change message of UE, flow information and new customer requirements according to current service RNC judge whether current service RNC satisfies predetermined conditions, if, still use the Serving RNC of current service RNC, otherwise carry out next step as UE;

G. in satisfying other RNC of predetermined conditions, select a RNC as new Serving RNC, new Serving RNC obtains management information by the LSP passage between the RNC from original RNC, original RNC will upgrade the service universal grouping wireless business supporting node SGSN of result notification core net, use new RNC that UE is inserted RAN then.

8. cut-in method according to claim 7 is characterized in that, described predetermined conditions is that the QOS that comprises in the PDP Context change message of the present flow rate of RNC and UE requires sum smaller or equal to the threshold value that sets in advance.

9. cut-in method according to claim 7 is characterized in that, this method further comprises receive the PDP Context change message of UE at step e after:

Determine whether and to judge according to flow information and the new customer requirements of current service RNC whether current service RNC satisfies predetermined conditions according to predefined constraints, if, carry out described determining step, otherwise still use current Serving RNC that UE is inserted RAN.

10. cut-in method according to claim 9 is characterized in that, described constraints is to keep RNC constant to each UE, and perhaps the Serving RNC to the UE in the predetermined amount of time remains unchanged.

11. cut-in method according to claim 7 is characterized in that, sets up NODEB to the signaling LSP passage between each RNC in step a static state, and RNC and RNC LSP passage each other, described method further comprises:

Regularly collect the flow information of all LSR among the RAN at step b;

Determined in step c or steps d after the Serving RNC of UE that dynamically setting up from NODE B to the data LSP passage this Serving RNC or use according to the flow information of LSR among the RAN that regularly receives has been the data LSP passage that other UE dynamically sets up;

In step g, after selecting a RNC, dynamically set up the data LSP passage between NODE B and the new RNC or use these data LSP passage of dynamically having set up for other UE as new Serving RNC;

In step g new Serving RNC obtains management information by the signaling LSP passage between RNC and the RNC from original RNC after, judge whether to also have other UE to use the data LSP passage of dynamically setting up, if, directly carrying out original RNC will upgrade the result notification network and use new RNC UE to be inserted the step of RAN, otherwise original RNC deletion data LSP passage relevant, and then carry out original RNC and will upgrade the result notification network and use new RNC UE to be inserted the step of RAN with NODE B.

12. cut-in method according to claim 1, it is characterized in that, this method further comprises: if when not receiving the flow information of Serving RNC of the RNC of current service or acquiescence when regularly receiving the flow information of RNC, select a new RNC as Serving RNC UE to be inserted RAN in other RNC.

13. RAN system that is applied to UMTS, at least comprise by the MPLS network connect greater than 1 NODE B with greater than 1 RNC, it is characterized in that, described system further comprises a flow collector unit and a RNC updating block, described flow collector unit is used for collecting the flow information of RAN RNC and LSR and notifies NODE B, described RNC updating block is used to judge whether to carry out RNC to be upgraded and is used to carry out concrete renewal and handle, each NODE B among the RAN and more than or equal between 1 the RNC, and RNC and RNC have the LSP passage each other.

14. RAN according to claim 13 system, it is characterized in that, described flow collector unit is made up of traffic engineering processing module that increases on NODE B and the traffic engineering processing module that increases on RNC, the traffic engineering processing module that increases on the described NODE B is used for collecting the flow information of each RNC of RAN and the flow information of each LSR, described RNC goes up the flow information that the traffic engineering processing module that increases is used to collect this RNC, and broadcasts this flow information in RAN.

15. RAN according to claim 13 system, it is characterized in that, described RNC updating block is made up of RNC selection module that increases on NODE B and the Coordination module that increases on RNC, and the RNC selection module that increases on the described NODE B is used for the Serving RNC according to flow information and customer requirements selection UE; The Coordination module that described RNC upward increases is used for the switching between the processing of RNC renewal process and original RNC.

16. RAN according to claim 13 system is characterized in that, the LSP passage between described NODE B and the RNC comprises static signaling LSP passage and the data LSP passage of setting up.

17. RAN according to claim 13 system is characterized in that, the LSP passage between described NODE B and the RNC comprises static signaling LSP passage of setting up and the data LSP passage of dynamically setting up when needing data to transmit.