CN100369522C

CN100369522C - Method for switching users between different subzones implemented within same station

Info

Publication number: CN100369522C
Application number: CNB200410006337XA
Authority: CN
Inventors: 熊军
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: China Academy of Telecommunications Technology CATT
Priority date: 2004-02-26
Filing date: 2004-02-26
Publication date: 2008-02-13
Anticipated expiration: 2024-02-26
Also published as: CN1662091A

Abstract

The present invention discloses a method for realizing user switching among different small zones within the same base station, which comprises the steps: user switching is triggered by a radio network controller according to a scheduled mode to send radio link increase request information to a base station; an identifier of a local user and the number of a small zone corresponding to the radio link are obtained according to the radio link increase request information; the existing radio link information corresponding to the local user is obtained according to the identifier of the local user; a new radio link is established according to the radio link increase request information and the existing radio link information of the local user which is obtained; after the new radio link is successfully established, radio link increase response information is sent to the radio network controller. A radio link increase process, a radio link deleting process, and processing mechanisms of a base station subsystem and a user terminal physical layer in an integral signaling switching flow are defined by the present invention, the processing of user switching among different small zones at a signalling layer of the base station subsystem is simple and clear, and switching efficiency is enhanced.

Description

Realize the method that the user is switched between different districts in the same base station

Technical field

The present invention relates to the mobile communication technology field, be specifically related to a kind of method that realizes that the user is switched between different districts in the same base station.

Background technology

3G (Third Generation) Moblie will be made up of satellite mobile communication net and land mobile communication net.They will form a three-dimensional communications network network to the seamless covering in the whole world, satisfy city and various user density from far-off regions, high-speed mobile, support the advanced person's of speech, data and multimedia service mobile radio communication, realize the ideal of human personal communication substantially.As a complete mobile communication standard, the standard of IMT-2000 is made of two major parts: CN (core network) and RAN (wireless access network), its network configuration as shown in Figure 1.According to the notion of 3GPP, RAN is exactly the RNS (wireless access network system) among Fig. 1, and it is made of RNC (wireless network manager), Node B (base station sub-system) and UE (user terminal).Node B is connected on the RNC by Iub (interface between RNC and the Node B) interface, and it supports FDD (Frequency Division Duplexing (FDD)) pattern, TDD (time division duplex) pattern or double mode.RNC comprises merging/fractionation function of supporting grand diversity between the different N ode B, and needs are maked decision with the switching that UE has signaling to be connected.Node B comprises one or more sub-districts.Wireless network layer at Iub (interface between RNC and the Node B) interface is NBAP (applying portion of Node B agreement), and it is responsible for the RNC of RNS inside and the Signalling exchange between the Node B.

In the 3G (Third Generation) Moblie standard, as leading position is CDMA (code division multiple access) standard, owing to reasons such as the restriction of base station power emission and channelings, the scope that the base station covered is limited, so must have many base stations in the area, the user moves to the another one base station from a base station, must bring the switching problem between the base station.The processing signaling flow process that switches in NodeB between the base station is that Radio Link is set up process.In order to satisfy the ever-increasing demand of mobile subscriber in the Digital Cellular System of future generation, can be used for disturbing and increasing in the minimizing system capacity of system based on the cdma system of sectorization and multi-transceiver technology.So Node B adopts three carrier waves and three sector systems among the present stage TD-SCDMA, such Node B will have a plurality of sub-districts, a sector under the corresponding carrier wave in one of them sub-district.In order to effectively utilize power system capacity and to guarantee the service quality of system, the user is switched the flow process that the NBAP signalling module handles between the different districts in same Node B be that Radio Link increases process.Because it all is to use in handoff procedure that Radio Link foundation and Radio Link increase these two signaling processes, therefore, they have a lot of similar processing.

For example, the signaling process of user when purpose Node B switches to source Node B is as shown in Figure 2:

The figure shows and use Radio Link to set up the handoff procedure that carries out.The control of RNC Radio Resource triggers switching according to measurement report or control algolithm, at first RNC sends Radio Link to Node B and sets up request message, Radio Link is set up request message and has been comprised and set up needed all parameters of a wireless links: cell ID, TFS Transport Format Set, transport format combination set, gap information, code channel information and power control information or the like.These information are differentiated arrangement dispose each subsystem of giving physical layer then respectively, new configuration information is after each subsystem of physical channel comes into force, the NBAP signaling processing module of base station returns RNC and sets up response message, mainly is included as to set up Iub bearer context for data transmission transport layer address information.After receiving that Radio Link is set up response message, RNC uses ALCAP (Access Link Control Application Protocol) agreement to start the foundation of Iub bearer context for data transmission and the foundation of Iub interface transport channel synchronization.Then, RNC carries out reshuffling of physical channel to user terminal, reshuffles the Radio Link that RNC after finishing deletes former Node B control.Here it is, and RL sets up the application of process in handoff procedure.

Local user (NBCC_ID) at Node B has had under the situation of a wireless links, owing to the reason of switching, the Radio Link that RNC can send this user increases message, comprise in the Radio Link increase message: gap information, code channel information and optional power control information, but lack TFS Transport Format Set, transmitting channel informations such as transport format combination set.Node B finishes dealing with after the Radio Link increase message, if do not adopt diversity mode then need to return the transport layer address information of Iub bearer context for data transmission, if adopted diversity mode then need to indicate this user's the other wireless links sign that has existed.

Because the TDD system does not support soft handover and grand diversity, a user at a time only supports a wireless links.In order to guarantee in handoff procedure not traffic affecting transmission quality, the TDD system reaches the purpose of not only saving Internet resources but also guaranteeing transmission quality by baton handover.Baton handover is one of core technology of TD-SCDMA mobile communication system.Its design philosophy is to utilize technology such as smart antenna and uplink synchronous, on the basis that the distance and bearing to user terminal positions, judge as supplementary whether present user terminal has moved to the close region of the adjacent base station that can switch according to user terminal orientation and range information.If user terminal enters the switch area, then RNC notifies the preparation that switching is carried out in this base station, thereby reaches fast, the reliably and efficiently purpose of switching.Baton handover integrates the high success rate of soft handover and the high channel utilance of direct-cut operation dexterously by organically combining with technology such as smart antenna and uplink synchronous, is a kind of changing method with optimization of better systematic function.In the baton handover process, because Radio Link increases the existence of process, will there be two wireless links in a user, and for the TDD system, how this situation handles prior art in base station side is not explained.And Radio Link increases process and not only is used for baton handover, and the direct-cut operation in the TDD system uses this process too, the present physical layer of treatment region complicated variant of direct-cut operation and baton handover and the resource management module among the RNC.

In Radio Link increase message, a diversity control field IE is arranged, be used for indicating this new Radio Link of Node B whether to make up with already present Radio Link.Diversity control field IE has following several different setting:

May: expression can be made up with already present Radio Link, and Node B can make any selection.

Must: expression Node B must make up this wireless links that increases with an already present wireless links, and when new Radio Link is combined, which wireless links Node B will select make up with it.

Must not: expression Node B will not make up with already present any wireless links.

Provided the implication of each IE of diversity control field on the agreement, whether this needs to provide information with already present Radio Link combination for Node B.But how base station side uses diversity control field IE not have clear and definite indication, there is not TFS Transport Format Set in the wireless link increasing request message that RNC sends over, transmitting channel information such as transport format combination set and might not have relevant power information, how configures physical layer and FP (Frame Protocol), not explanation on the agreement at present.

In addition, Radio Link increases process and when will be called by RNC, does not also have clear and definite explanation on the agreement at present, and lacking Radio Link increases the complete process flow of process at Node B.

Summary of the invention

Problem in view of above-mentioned prior art existence, the purpose of this invention is to provide a kind of method that realizes that the user is switched between the different districts of base station, increase process, delete procedure and base station sub-system and the treatment mechanism of user terminal physical layer in the whole signaling switching flow with clear and definite Radio Link, make between different districts user's the processing that switches in the base station sub-system Signaling Layer simple and clear.

The objective of the invention is to be achieved through the following technical solutions:

A kind of method that realizes that the user is switched between the different districts of base station comprises:

A, radio network controller are pressed predetermined way and are triggered user's switching, send wireless link increasing request message to the base station;

B, obtain local user sign and described Radio Link corresponding district numbering according to described wireless link increasing request message;

C, set up user radio link information table, and obtain the home cell numbering and the local wireless sign at the existing Radio Link of described user place according to described local user sign and cell number, identify according to described home cell numbering and local wireless and retrieve described user radio link information table and obtain the wireless link information that corresponding described user has preserved;

D, set up newly-increased Radio Link according to the existing wireless link information of described wireless link increasing request message and described this user who obtains;

E, described newly-increased Radio Link are set up successfully, and the back sends Radio Link increase response message to described radio network controller.

Predetermined way in the described steps A comprises:

A1, according to the measurement report of user terminal;

A2, according to the measurement report of base station;

A3, according to the load control algolithm.

Described wireless link increasing request message comprises: local user's sign, cell number, diversity control information, the local sign of coded combination transmission channel, gap information, code channel information and optional power control information, wherein, clear and definite diversity control information is set in the base station: newly-increased Radio Link does not make up with already present any wireless links.

Described user radio link information table comprises: all users' information in the BTS management sub-district comprises: local user's sign, described user's local wireless sign, binding logo, the local sign of dedicated transmission channel, home cell numbering, the local sign of coded combination transmission channel, dedicated transmission channel, transport format combination set, power control information and code channel information.

Described step C comprises:

Identify pairing dedicated transmission channel this locality with the local wireless under the described home cell numbering and be designated the described dedicated transmission channel information of index stores;

Be designated index with the local wireless sign institute corresponding coded combination transmission channel this locality under the described home cell numbering and in described user radio link information table, store up and down power adjustment step-length, up link target sir, transformat combination indication coding, punching restriction, transport format combination set information.

Retrieving described user radio link information table according to described home cell numbering and local wireless sign and obtain the wireless link information that corresponding described user preserved and comprise among the described step C:

C21, when comprising power control information in the described wireless link increasing request message, from described user radio link information table, obtain dedicated transmission channel information, transport format combination set information that should the user;

C22, when not comprising power control information in the described wireless link increasing request message, from described user radio link information table, obtain dedicated transmission channel information, transport format combination set information and power control information that should the user.

Described step C22 comprises:

Obtain the dedicated transmission channel information that corresponding described user has preserved according to described home cell numbering and the described user radio link information table of local wireless sign retrieval;

Obtain up and down power adjustment step-length, up link target sir, transformat combination indication coding, punching restriction, the transport format combination set information that described user has preserved according to described home cell numbering, local wireless sign and the local sign of described coded combination transmission channel.

Described step D comprises:

D1, in described base station, increase new Radio Link according to described wireless link increasing request message;

D2, when the existing Radio Link of described user is in non-ly when reshuffling standby condition and non-reconfiguration status, dispose described new Radio Link according to the described existing wireless link information of this user that obtains.

Described step D2 comprises:

The transmission rate that each bar dedicated transmission channel of the corresponding described user that D21, basis are obtained is stored is carried out the distribution of asynchronous transfer mode link circuit resource, and writes down the transport layer address that each bar dedicated transmission channel is carried;

D22, the Radio Link switching mark being set, is that Radio Link is set up request message or wireless link increasing request message with what distinguish that the base station receives that radio network controller sends;

D23, the physical layer and the Frame Protocol module of described new Radio Link are carried out parameter configuration.

Described step D23 comprises:

If described base station is received Radio Link and is set up request message, it is that Radio Link is set up configuration information that described Radio Link switching mark then is set, and according to the parameter in the described Radio Link request message physical layer and the Frame Protocol of the Radio Link set up is carried out parameter configuration then;

If wireless link increasing request message is received in described base station, described Radio Link switching mark then is set is Radio Link increases configuration information, according to the described existing wireless link information of this user that obtains the physical layer and the Frame Protocol of the Radio Link that increases is carried out parameter configuration then.

Described step D also comprises: after described newly-increased Radio Link is set up successfully, increase the information of described new Radio Link in described user radio link information table.

Described step e comprises: organize described Radio Link to increase response message according to described Radio Link switching mark, new Radio Link recorded information, described Radio Link is increased comprise new enhanced-dedicated transmission channel identification number and corresponding transmission bearer address in the response message.

By above technical scheme provided by the invention as can be seen, the present invention is clear and definite, and Radio Link increases process processing at Node B in whole Universal Terrestrial Radio Access Network switching flow.Overlap independently dedicated transmission channel and corresponding ATM (asynchronous transfer mode) transmission bearer by user's each wireless links correspondence one in handoff procedure, make switching processing simple; By physical layer is carried out identical processing to the foundation of Radio Link with increase with the Frame Protocol module, optimize the handling procedure of physical layer and Frame Protocol, and then improved switching efficiency, ensured service quality better.

Description of drawings

Fig. 1 is the 3-G (Generation Three mobile communication system) schematic network structure;

Fig. 2 is the signaling process the when user is switched between different base station in the prior art;

Fig. 3 is the flow chart of the method that the user is switched between different districts in the same base station of the present invention;

Fig. 4 is that Radio Link increases the typical treatment process schematic diagram of process in the base station in the inventive method.

Embodiment

Core of the present invention has been clearly in the same base station between different districts that Radio Link increases process, Radio Link delete procedure, base station and the treatment mechanism of user terminal physical layer in the whole signaling switching flow in the subscriber handover process.The base station is designated index by local district identification and local wireless when handling Radio Link increase process, extraction is kept at the transmitting channel information of the already present Radio Link of this user in NBAP (Node B agreement) signalling module, then the parameter that obtains is integrated, physical layer and Frame Protocol module are carried out the configuration that channel activates, realize switching between different districts in the same base station processing of NBAP Signaling Layer.

The present technique field personnel know, the utilization of TD-SCDMA (TD SDMA) system obtains the positional information of user of mobile station, realize baton handover, avoided shared a large amount of Radio Resources of grand diversity in the soft handover and frequent switching, improved power system capacity and efficient greatly.

In the TD-SCDMA system, for the reasons such as modification, dynamic channel allocation or professional change of power, RNC can send radio link reconfiguration message to Node B, but can not indicate Node B to allow the user switch by radio link reconfiguration message.Wireless links reconfiguration course comprises synchronously and non-synchronized radio link reconfiguration that these two processes all can not replace Radio Link increases the task that process is finished.Though radio link reconfiguration message can be finished modification, deletion and the increase of physical channel, dedicated transmission channel also can carry out corresponding modification, deletion and increase simultaneously.But on the one hand because do not switch back this parameter of Cell Identity CI in the radio link reconfiguration message, so Node B will not know which sub-district this user will switch to.The parameter of power modification or the modification information of some dedicated transmission channels may only be arranged in the reconfiguration message on the other hand, will be not enough to provide Radio Link to switch needed information.Therefore, RNC need set up process and/or Radio Link increase process by Radio Link and finishes the user and switch.

Because a Node B is divided into a plurality of sub-districts (perhaps being called the sector), when switching between the different districts of same Node B, Node B this user after receiving the Radio Link increase message that RNC sends over will not carry out business and change, because:

1, the user switches to another one sub-district that time from a sub-district, think in the very short period that at this section this wireless links institute loaded service does not change, because after RNC sends to Node B one wireless links increase message, before not receiving the Radio Link increase response message that Node B returns, think that business can not change this time, if professional change is arranged during this period of time really, RNC also will receive by the time after Radio Link increases response message and this wireless links be reshuffled again.

2, when Node B is handling this user's wireless links reconfiguration course, increase message if received this user's a wireless links again, Node B will return to RNC one wireless links increases failed message, shows that the user is at the Radio Link handoff procedure that carries out can not handling when business is reshuffled in the same NodeB.

By above analysis as can be seen, this user can not carry out professional change when same Node B switches, if reshuffling of managing business, Radio Link increases message can be not successful yet.So when handling wireless links increase message, can think business less than changing, therefore use Radio Link to increase process and just can satisfy the requirement of switching between same Node B different districts, do not set up process and do not re-use Radio Link.Can use the original corresponding transmitting channel information that Radio Link comprised of this user and some power informations this moment.Radio Link increase process is exactly the signaling process process that a user is switched between different districts/sector in same Node B.

Because the Radio Link that increases uses independently transmission channel resources, do not use identical transmission channel resources with already present Radio Link, that is to say that this wireless links that this user increases does not use identical dedicated transmission channel information with already present Radio Link, the information of a dedicated transmission channel transmission uses for a wireless links.So Node B can only select " not with already present Radio Link combination ", the diversity control field IE that RNC sends should be set to " Must not " or " May " (if " May ", then Node B can select arbitrarily, actual Node B still will select " not with already present RL combination "), otherwise return failed message to RNC.Make in this way, when a user is switched between same Node B different districts, the Radio Link that this user increases after Radio Link that this user has existed before switching and the switching all has dedicated transmission channel and corresponding ATM carrying separately, so after Node B finished dealing with Radio Link increase message, the Radio Link that sends to RNC increases just must comprise the pairing ATM transmission bearer of the dedicated transmission channel information that increases in the response message.According to this message, RNC will send to data service on the dedicated transmission channel of this wireless links of increase, and has not re-send on the dedicated transmission channel of original Radio Link.

The carrying of home cell service plane can also be considered like this: at service plane, business datum need send to each home cell, TDD system for present design, the corresponding permanent circuit (PVC) of fabricating of each home cell, the corresponding VPI+VCI (VPI+virtual channel identifier) of PVC.Present stage TDD system design is that a Node B can only corresponding VPI, so the PVC of same NodeB must be identical VPI.A NodeB may manage a plurality of home cells, the business of being transmitted on home cell is transmitted in the pairing carrying of a VCI (this moment VCI only be used for bearer service), and the business that is to say this home cell connects at specified one group of AAL2 (ATM Adaptation Layer type 2) link of this VCI and goes up transmission.When carrying out the Radio Link increase,,, do not use identical atm link with already present Radio Link so the pairing dedicated transmission channel of this wireless links that increases also must use the ATM transmission bearer on the new sub-district because changed home cell.

Because a Node B may manage a plurality of home cells, each home cell will take the binding logo of some, and the numerical value of binding logo is unique in Node B.Each bar dedicated transmission channel all has unique binding logo corresponding with it.In returning to the Radio Link increase response message of RNC, need the transport layer address information, because the transport layer address is used for determining Node B.If Node B and RNC adopt Y-connection, atm link just can directly find corresponding N ode B by the VPI of correspondence, and this moment, the transport layer address information was nonessential.If but Node B is linear the connection or tree-like connection with the topological structure of RNC, that is to say that some Node B is connected with RNC by other Node B not have directly to be connected with RNC, just need the transport layer address as routing address this moment, RNC sends to this Node B to configuration information by this address exactly by other Node B, and can not send mistake or can not find routing address.

Because the binding logo of collaborative dedicated transmission channel all is the same, and all is a shared atm link, therefore, the dedicated transmission channel of binding logo and transport layer address information only return to(for) one group of collaborative dedicated transmission channel get final product.So no matter which kind of Node B adopts be connected with RNC, comprised binding logo and transport layer address information as long as Radio Link increases the dedicated transmission channel of setting up in the response message, RNC just can send to the business datum of this wireless links among the Node B on the corresponding transmission channel of this wireless links exactly.Like this, after Radio Link increase response message sends to RNC, on the service plane of Iub interface, can normally carry out transfer of data.

In order to make those skilled in the art person understand the present invention better, the present invention is described in further detail below in conjunction with drawings and embodiments.

With reference to Fig. 3, Fig. 3 shows the detailed process of the inventive method, may further comprise the steps:

Step 301: set up user radio link information table by the base station.This table content comprises the information of all users in the BTS management sub-district, mainly contains: local user's sign, user's local wireless sign, binding logo, the local sign of dedicated transmission channel, home cell numbering, the local sign of coded combination transmission channel, dedicated transmission channel, transport format combination set, power control information and code channel information.Wherein, the local user identifies the Node B communication context that defines in the agreement just, is unique customer identification number in the NodeB; The local wireless sign is unique customer identification number in the home cell; The local sign of dedicated transmission channel is the unified numbering that the NBAP signalling module carries out according to the quantity of the DCH in the home cell (dedicated transmission channel).The retrieval of user radio link information when setting up this table, identifies pairing dedicated transmission channel this locality with the local wireless under the home cell numbering and is designated index stores dedicated transmission channel information for convenience; Identify pairing coded combination transmission channel this locality with the local wireless under the home cell numbering and be designated index stores up and down power adjustment step-length, up link target sir, transformat combination indication coding, punching restriction, transport format combination set information.Specify as follows:

Consider that RNC sends to that the CCTrCH ID of base station (coded combination transmission channel sign) numerical value be can not determine or numerical value at random, can distribute the local sign of a coded combination transmission channel for each bar CCTrCH ID, this sign is designated the index stores up and down power with this and adjusts step-length, up link target sir, transformat combination indication coding, punching restriction, transport format combination set information since 0 number consecutively.Improve inquiry and retrieve these information processings time with this.

Step 302: radio network controller is pressed predetermined way and is triggered user's switching, sends wireless link increasing request message to the base station.Predetermined way wherein can be: according to the measurement report of user terminal or according to the measurement report of base station or according to the load control algolithm.The content of wireless link increasing request message comprises: local user's sign, cell number, diversity control information, the local sign of coded combination transmission channel, gap information, code channel information and optional power control information, wherein, clear and definite diversity control information is set in the base station: newly-increased Radio Link does not make up with already present any wireless links.

Step 303: judge whether the Radio Link corresponding district that need increase is available.

Judge whether available foundation is in the sub-district: though this sub-district is set up, the hardware that OM (operating maintenance module) detects this sub-district has problem, and this sub-district of notice NBAP signalling module cannot re-use.It is unavailable that this sub-district NBAP signalling module when being in blocked state also writes down this sub-district in addition.If being in down state, the residing sub-district of the Radio Link of this increase returns to a RL of RNC (Radio Link) increase failed message; The residing sub-district of Radio Link that existed of user must be inequality therewith in the residing sub-district of Radio Link of adding, because a user can only have a RL on same sub-district, increases failed message otherwise will return RL; If the Radio Link that increases sign is identical with the Radio Link numerical value that this user has existed, and obviously is logic error to have occurred, also will return RL increases failed message.

If unavailable, then enter step 311: returning Radio Link to RNC increases failed message.

If available, then enter step 304: obtain local user's sign and cell number according to wireless link increasing request message.

Step 305: home cell numbering and the local wireless sign of obtaining the existing Radio Link of user place according to local user's sign.

A Node B is in charge of a plurality of sub-districts, and the NBAP signaling processing module all distributes a home cell numbering to these sub-districts.Local user's sign is arranged in the wireless link increasing request message that RNC sends over, this local user sign is that Radio Link is set up in the process to be distributed concrete numerical value and to be set up response message by Radio Link by the NBAP signalling module and returned to RNC, after the RNC this Radio Link is carried out other operation and just use this local user's sign, this sign is provided as unique user ID in the Node B.

Identify the local wireless sign that retrieval user wireless link information table can obtain the existing Radio Link of this user place according to the local user.

The local wireless sign is local identification number: the LocalRL_ID that each home cell all will be provided with the Radio Link of setting up.Because all dedicated transmission channel information all is recorded in below the home cell, is all dedicated transmission channel information that index just can find this wireless links correspondence with LocalRL_ID.

Insert the needed hardware resource of home cell at Node B, operating maintenance module (OM) detects these hardware resources, whether OM judges these hardware resources can satisfy that to add a home cell needed, OM just carries out initialization to this home cell if meet the demands, OM initialization success back this home cell of notice NBAP signalling module has added success, after NBAP receives this message of OM, just set up, the home cell numbering is arranged in the message by this home cell of resource status Indication message notice RNC.At this moment RNC will send the pairing sub-district of this home cell and set up message, and existing home cell numbering in the message is set up in the sub-district, and cell number is also arranged.The home cell numbering is unique in the Node B, and cell number is unique in the RNC, so the common value of cell number is all bigger, and numerical value relatively also more at random.The home cell numbering is exactly the number that Node B had before told RNC, because the home cell numbering is Node B oneself configuration, so value is all smaller, usually start from scratch and add one successively, for example a Node B has 9 home cells, the home cell numbering just might be from 0 to 8, will use the home cell numbering to carry out the storage of resource and the index of searching at the NBAP signalling module like this.Node B whenever receives from the sub-district that RNC sends over and sets up message, just in the NBAP resource management module, write down this sub-district of setting up, identify this sub-district and be established, this time, NBAP also just knew the corresponding relation that cell number and home cell are numbered certainly.Therefore, can know corresponding home cell numbering according to cell number.After Node B received Radio Link increase message, the NBAP signalling module judged whether the sub-district in this message has been set up and whether this home cell of correspondence is available, if this sub-district is not set up then returned failure.So just guaranteed of the normal operation of the Radio Link of increase at Target cell.

Step 306: identify retrieval user wireless link information table according to home cell numbering and local wireless and obtain wireless link information to should the family having preserved.

Do not have dedicated transmission channel information because RNC sends in the wireless link increasing request message of base station, perhaps do not have the information such as power, transport format combination set of this wireless links yet.Just can't configures physical layer and Frame Protocol module if can not get these information.Do not change owing to think professional when between same Node B different districts, switching, therefore can use the dedicated transmission channel information on the wireless links that this user exists before switching fully.Divide following two kinds of situations:

(1), then obtains in the user radio link information table dedicated transmission channel information, transport format combination set information that should the user if comprise power control information in the wireless link increasing request message;

(2), then from user radio link information table, obtain dedicated transmission channel information, transport format combination set information and power control information that should the user if do not comprise power control information in the wireless link increasing request message.

Concrete retrieving is as follows:

A) identify retrieval user wireless link information table according to home cell numbering and local wireless and obtain dedicated transmission channel information should the user having preserved:

Because is that unit calculates for dedicated transmission channel distributes the atm link resource according to a home cell, in the NodeB a plurality of home cells are arranged, the ATM resource of each home cell (the bar number and the corresponding bandwidth of AAL2 link) all was the same before not being transmitted channel occupancy.Home cell will be for setting up the atm link that each bar dedicated transmission channel distributes respective bandwidth, so the user mode of atm link resource (seizure condition and idle condition) is exactly to carry out record according to home cell.Like this, dedicated transmission channel information is also stored according to home cell, just can unite the atm link resource of dedicated transmission channel information and distribution at an easy rate.In addition, because dedicated transmission channel information is to be used for channel coding module in configures physical layer and the Frame Protocol module, and these two modules have on each home cell, and different sub-districts all is an independent process, so should be that unit is configured according to the sub-district to their configuration information.Since the dedicated transmission channel informational needs is stored according to home cell, the NBAP signalling module distributes well-determined number in the home cell for this user (NBCC_ID) so: local wireless sign LocalRL_ID.Therefore, the present invention identifies all dedicated transmission channel information that retrieval user wireless link information table just can find the Radio Link correspondence that this user set up at an easy rate according to home cell numbering and local wireless, and does not directly use the index of NBCC_ID as the dedicated transmission channel information stores.

It should be noted that: the pairing dedicated transmission channel of already present that wireless links of this user is to be assigned with the ATM resource, and this wireless links of increase also needs to redistribute the ATM resource.Because each home cell takies the situation difference of ATM resource, although the dedicated transmission channel information of newly-increased link does not change, but the ATM resource difference that might distribute because when being fit to the ATM inadequate resource of this rate business, can be selected the ATM resource of bigger speed.

B) obtain up and down power adjustment step-length, up link target sir, transformat combination indication coding, punching restriction, the transport format combination set information that described user has preserved according to described home cell numbering, local wireless sign and the local sign of described coded combination transmission channel:

If comprise power control information in the wireless link increasing request message that RNC sends over: initial downlink link transmitting power, the maximum downlink transmitting power, these numerical value will be stored and directly be used to minimum downlink transmitting power, NBAP signaling processing module; If there are not these parameters, the NBAP signalling module will use user terminal to be stored in power control information in the user radio link information table at present.Also do not comprise if the power of the Uplink/Downlink in the wireless link increasing request message that RNC sends over is adjusted step-length, the NBAP signaling processing module also will use existing power to adjust step-length information physical layer will be configured.Think that Radio Link increases the professional not change in process front and back, power control information is not variation also, does not also change so can infer the shared physical channel resources of this wireless links.Because RL that increases and the RL that existed might code channel quantity be less than variation, but the shared time slot of these code channels might change, even time slot does not change, but the residing position of code channel also may change on this time slot, because the shared time slot of Radio Link is normally different with code channel on the different sub-districts, and RNC is sometimes owing to the reason of dynamic channel allocation or the control of some power need be carried out the adjustment of spreading factor and code channel.So can not have the information of power in the wireless link increasing request message, but the information of code channel must be arranged.

When not comprising power control information in the wireless link increasing request message that RNC sends over, need to use the existing power information of this user.At first find the home cell numbering and the local wireless sign of that original wireless links correspondence of this user by local user's sign, from this wireless links of this locality, find any physical channel, power information is taken out, compose and use for the Radio Link that increases.Up and down power adjustment step-length (TPC UL/DL Step Size) and UL SIRTarget (up link target sir), TFCI coding (transformat combination indication coding), Puncture Limit (punching restriction), TFCS information stores such as (transport format combination sets) are below CCTrCH, so also be to find this wireless links by home cell numbering and local wireless sign, be that index finds these information with CCTrCH ID again, these information taken out give this RL of increase again.The front is mentioned, consider that CCTrCH ID numerical value that RNC sends over be can not determine or numerical value at random, can distribute a local CCTrCHID sign for each bar CCTrCH ID, the local CCTrCH ID number consecutively of starting from scratch, can be the retrieval that index carries out these information like this, just with local CCTrCH ID.

Step 307: set up newly-increased Radio Link according to wireless link increasing request message and the existing wireless link information of this user of obtaining.

At first increase a new Radio Link, after the Radio Link that increases obtains dedicated transmission channel information and some power control informations, enough information configuration physical layers and Frame Protocol module are just arranged according to wireless link increasing request message.When the existing Radio Link of user be in non-when reshuffling standby condition and non-reconfiguration status, according to the new Radio Link of wireless link information configuration that obtains.Comprise:

(1) transmission rate of being stored according to each the bar dedicated transmission channel to should the user that obtains is carried out the distribution of atm link resource, the transmission bearer resource of just distributing dedicated transmission channel, the transmission bearer resource of dedicated transmission channel is that unit distributes with a home cell, distribution between the home cell is separate, the transport layer address that needs each bar dedicated transmission channel correspondence of record, because Node B is to select " not with already present Radio Link combination " handling when Radio Link increases process, promptly adopt the non diversity mode.Since adopted the non diversity mode, thus need distribute ATM transport layer address and Binding ID (binding logo) for the dedicated transmission channel that increases, and to return to RNC to these information.

(2) physical layer and the Frame Protocol to new Radio Link carries out parameter configuration.

In order to improve allocative efficiency, the present invention carries out the configuration of transmission channel according to the local sign of dedicated transmission channel to Frame Protocol module and physical layer, help Frame Protocol module and physical layer on the one hand separately to the dedicated transmission channel information processing, this is because a Frame Protocol module and physical layer channel code module are all arranged on each home cell, on home cell separately, independently handle, these dedicated transmission channel this locality are identified at unique number in the home cell, and they just can carry out the storage and the processing of dedicated transmission channel information to the local sign of this dedicated transmission channel that distributes as index like this.Frame Protocol module and physical layer are in carrying out the data service transport process on the other hand, because the channel coding module of FP module and physical layer all is to handle as array indexing separately by the local sign of same dedicated transmission channel, obviously reduce the processing complexity between physical layer channel code module and Frame Protocol module interface, helped the processing speed of data service.

At first, judge according to following situation whether this wireless links is in and reshuffle standby condition and reconfiguration status:

1) when handling synchronised radio link reconfigure, radio link reconfiguration is prepared the NBAP signalling module that message sends to Node B, the NBAP resource management module at first is set to reshuffle standby condition to this wireless links, and then the Frame Protocol module is carried out returning reconfiguration response message after being configured to of time window.By the time the submission message of this wireless links sends to after the Node B, in the NBAP resource management module, obtain previous radio link reconfiguration and prepare stored configuration information, then the NBAP signalling module carries out the configuration of parameter to physical layer and Frame Protocol, after the configuration successful, by the cancellation of NBAP signalling module this wireless links is reshuffled the setting of standby condition again, before cancellation was reshuffled the setting of standby condition to this RL, the NBAP signalling module of Node B was not receive Radio Link to increase message.

2) after Node B receives non-synchronized radio link reconfiguration message, it is reconfiguration status that the NBAP signalling module also will be provided with this wireless links, and then physical layer and Frame Protocol carried out the configuration of parameter, after the configuration successful, cancel setting again to this wireless links reconfiguration status.When this wireless links was in reconfiguration status, also not receiving Radio Link increased message.Therefore can guarantee that this wireless links reshuffling Shi Buhui and carrying out the switching between different districts in the same Node B at Node B.

All is independent operating for physical layer and Frame Protocol module in each sub-district, actually so or they are indifferent to Radio Link and set up the process Radio Link and increase process in when configuration, and the present invention designs NBAP signalling module and physical layer and Frame Protocol module and only defines a socket message thus: channel activation message.Radio Link that RNC sends over increases message physical layer and Frame Protocol being carried out channel when activating configuration, if lack what information, goes to obtain relevant information in the NBAP signalling module of arriving.When being configured to physical layer, the NBAP signalling module is provided with a flag bit, indicate that this is the configuration information of Radio Link foundation or the configuration information that Radio Link increases, by the time after all configuration successfuls to physical layer and Frame Protocol, just know that the response message that return to RNC is that Radio Link is set up response message or Radio Link increases response message according to the flag bit that sets.By a flag bit is set, the NBAP signalling module is distinguished this two processes by the definition of a socket type of message, when giving the configuration of physical layer and Frame Protocol, shield the difference of these two processes, reduce the definition of interface message header file like this, optimized physical layer and the processing of Frame Protocol module on program.

In order to improve physical layer and Frame Protocol module processing speed and efficient to configuration information, the present invention at first sorts in the NBAP signalling module to the size of the dedicated transmission channel information in the Radio Link according to DCH ID (dedicated transmission channel sign), and is followed successively by the local numbering of dedicated transmission channel distribution LocalDCH_ID according to the good order of ordering.Because the DCH ID that RNC sends over is numbered in this wireless links, thereby this numbering is unique in this wireless links.The NBAP signalling module is unique in home cell for the numbering that the DCH in this RL carries out, concrete numbering plan is that (coding rule of local RL ID is from 0 according to a local RL of the maximum M bars of home cell, 1, the 2 consistent M that number), article one, local RL has N bar DCH channel at most, the maximum quantity of local DCH numbering is M*N in such home cell, so the numbering of local DCH is unique on a home cell.According to the local RL ID that obtains, as index the DCH information of storage is taken out with local RL ID*N.Certainly RL increases the request message the inside does not have DCH information, and this user is numbered each bar DCH after need taking out previously stored DCH information again.Like this physical layer and Frame Protocol are all carried out the configuration of transmission channel according to LocalDCH_ID, help physical layer and Frame Protocol on the one hand separately to the dedicated transmission channel information processing, because a FP and physical layer channel code module are all arranged on each home cell, on home cell separately, independently handle, these LocalDCH_ID (local DCH sign) unique number in home cell, they just can carry out this LocalDCH_ID of distributing the storage and the processing of dedicated transmission channel information as index like this; Frame Protocol and physical layer are in carrying out the data service transport process on the other hand, because the channel coding module of Frame Protocol module and physical layer all is to handle as array indexing separately by same LocalDCH_ID, obviously reduce the processing complexity between physical layer channel code module and Frame Protocol module interface, helped improving the processing speed of data service.For dedicated transmission channel distributes LocalDCH_ID the necessity of storing dedicated transmission channel information at the NBAP signalling module has been described also, have only the NBAP signalling module that the LocalDCH_ID of the dedicated transmission channel correspondence of setting up is in the past stored, know that just which LocalDCH_ID is assigned with, just can know and distribute the local numbering should be from much numerical value to the dedicated transmission channel that will set up.It should be noted that also needs to distribute local numbering to the dedicated transmission channel in this wireless links distribution that increases, the dedicated transmission channel that is to say this wireless links correspondence that this user has existed has the numbering of local dedicated transmission channel on original home cell, because the Radio Link that increases has changed a home cell, so the Radio Link of newly-increased link also needs to redistribute local numbering.

Step 308: after newly-increased Radio Link is set up successfully, in user radio link information table, increase the information of new Radio Link.

Since the sub-district at the Radio Link place that the Radio Link that increases has existed with respect to this user scarcely with, so their pairing home cells are also just different.If this wireless links that increases is all set up success at physical layer and the Frame Protocol of Node B, these dedicated transmission channel information that then also need before to have taken out are kept at above the pairing home cell of this wireless links of increase.Because at this moment need to delete that original wireless links of this user, the information of this Radio Link of storing on the user radio link information table is also with deleted, certainly also comprise dedicated transmission channel information, so the pairing dedicated transmission channel of this wireless links that increases extremely relevant information must continue in Node B under the preservation, be that later handoff procedure uses.To ensure that at the high-level signaling of Node B the cellphone subscriber switches back and forth at the different districts of Node B like this, transmission channel, power information can not lost.

Step 309: organize Radio Link to increase response message according to the transport layer address of each bar dedicated transmission channel correspondence of new wireless link information and record.Because the diversity indication that Radio Link increases in the response message is selected not combine with already present Radio Link, comprise new enhanced-dedicated transmission channel identification number and corresponding transmission bearer address in the response message.

Step 310: sending Radio Link to RNC increases response message.

Describe Radio Link in the inventive method in detail below with reference to Fig. 4 and increase the typical treatment process of process in the base station:

1, user terminal is by information such as the Cell Identity CI of the adjacent sub-district of information acquisition of reading this sub-district and broadcasting in system information, basic Midamble (training sequence) sign indicating number, frequencies, constantly monitor these adjacent sub-districts according to these information of adjacent cells that obtain, measure the power of the received signal code power (PCCPCH RSCP) of the Primary Common Control Physical Channel of these adjacent sub-districts, if the power of the PCCPCHRSCP that measures surpasses certain upper limit value (the set upper limit value is also broadcasted) in system information, then trigger user terminal and send measurement report to RNC.

2, RNC is according to the measurement report or the other reasons (for example load control algolithm) of user terminal or base station, find that current area (cell-of-origin) measured value is lower than default threshold value, and another other sub-district (Target cell) is when measured value is higher than threshold value, so the startup handoff procedure switches to another better sub-district with this user terminal.RNC sends hand off signaling according to NBAP (Node B agreement) to NodeB.Increase a new Radio Link, discharge old Radio Link.

3, the switching command of the RNC that receives of Node B comprises: Radio Link is set up and two signaling processes of Radio Link increase.Illustrated in the description in front that using Radio Link to increase process just can satisfy the requirement of switching between the different districts of same base station, does not set up process and do not re-use Radio Link.What receive as Node B is Radio Link when setting up signaling, if there has been a wireless links in this user of this base station, if also will set up a wireless links, just starts Radio Link and increases process.A user has two wireless links at most in a period of time, at the same time actual use have only a wireless links.In this flow process, what Node B received is wireless link increasing request message.This message comprises: gap information, code channel information and optional power control information etc.After receiving this message, Node B obtains to be kept at the transmission channel and the power information of the wireless links that this user in the NBAP signalling module existed, integrate with the parameter that Radio Link increases in the message, by the NBAP signalling module physical layer and Frame Protocol are carried out the configuration that channel activates then.After the configuration successful, adopt " not with already present Radio Link combination " mode, increase the response message that comprises dedicated transmission channel in the response message at the Radio Link that sends.

Node B finishes dealing with after the wireless link increasing request message, if do not adopt diversity mode then need to return the transport layer address information of Iub bearer context for data transmission,

At the NBAP signalling module channel is activated message arrangement to after the physical layer of Node B, the physical layer of Node B will send some data according to the parameter of NBAP signalling module configuration on new physical channel, though at this moment business datum also there is not operation to get up, but the base station is in order to get in touch with the user and synchronously, and the physical layer of Node B will send some certain synchrodata frames that produced by the physical layer channel code module of Node B to the physical layer of user terminal.

User terminal no longer sends upstream data on original Radio Link after the activationary time point of appointment switches to new physical channel.At this moment, Radio Link on the former sub-district is not also deleted by the base station, but owing to do not receive data, so Node B physical layer detects coded combination transmission channel (CCTrCH) step-out of original this wireless links, Node B reports to the NBAP signalling module with step-out primitive, the NBAP signalling module is through after judging, to RNC report radio link failure message.

The physical layer of user terminal sends certain synchrodata frame simultaneously on the physical channel of newly-increased Radio Link, Node B physical layer is detecting user terminal after the synchrodata frame that sends on the physical channel of new configuration on the newly-increased Radio Link, if satisfy predetermined synchronous criterion, physical layer reports to the NBAP signalling module with synchronization primitives, the NBAP signalling module is through after judging, to RNC report wireless link synchronization message.Meanwhile, the physical layer of user terminal detects the synchrodata frame that Node B sends on the physical channel of new configuration, physical layer is carried out synchronously, after physical layer reaches synchronously, report to the RRC of user terminal, the RRC of user terminal receives that sending physical channel after this message reshuffles and finish message to RNC.

After RNC receives that Radio Link increases response message, begin to carry out the foundation and the transport channel synchronization of AAL2 link, just dedicated transmission channel is synchronous: upwards obtain the synchronous of dedicated transmission channel data flow at downlink side, purpose is that the transmission bearer of keeping Iub interface is in state of activation, these synchronous control frame do not send when having Frame, RNC sends a downlink synchronization control frame for Node B, also comprises current Connection Frame Number (CFN) in this frame.When Node B receives the downlink synchronization control frame, whether drop in the time window regardless of this frame point time of advent, all to return to the wireless link synchronization control frame that one of RNC comprises the time of advent (TOA).After the dedicated transmission channel that carries on the AAL2 link of setting up reaches synchronously, RNC can on this newly-increased wireless links, send business datum (but in fact this time high level temporarily be can not send business datum).At this moment, RNC sends the physical channel reconfiguration message to user terminal.

4, after user terminal is received the physical channel reconfiguration message of RNC transmission, the activationary time that sends over according to RNC calculates the activation SFN (System Frame Number) of Target cell channel, physical layer stops old wireless channel after activating SFN, bring into use new wireless channel.After new wireless channel reaches synchronously, RNC also can be corresponding activationary time point use newly-increased Radio Link, but to wait receive physical channel that user terminal sends over reshuffle finish after the message just can be on the dedicated transmission channel that newly disposes transmit traffic data.At this moment, the RRC of user terminal returns physical channel and reshuffles and finish message and give RNC.

RNC receive physical channel that user terminal sends over reshuffle finish message after, beginning sends downlink data on the new Radio Link that adds, at this moment RNC will delete the Radio Link on the former sub-district, after Node B physical layer is received Radio Link deletion message, stop to transmit and receive of data on this wireless links.After Node B deletes this wireless links, the AAL2 link of this wireless links of carrying will be removed.At this moment RNC might initiate Radio Link again increases request, the dedicated transmission channel information of up-to-date preservation will be used to use to the Radio Link that increases for the second time, can also carry out for the third time equally, the 4th time Radio Link increases process, so a user can be switched in the different districts of a Node B back and forth, it all is similar handling.Owing to stored this user's transmitting channel information at Node B, so RNC just can not have these transmitting channel informations in sending over wireless link increasing request message.Like this, saved the transmission quantity on the Iub interface on the one hand, also alleviated simultaneously the processing load that RNC increases Radio Link, RNC is just passable as long as physic channel information is sent to Node B by wireless link increasing request message, does not need to consider the situation that takies of transmission channel; Alleviated the time of RNC PER (PackedEncoding Rules) coding when organizing wireless link increasing request message on the other hand, and the NBAP signalling module is handled the time of PER decoding.Because the protocol message of NBAP all uses ASN.1 (DDL of standard) to describe.ASN.1 is a kind of abstract syntax notation that has nothing to do with platform specific, can not directly use.In the realization of NBAP subsystem, need in concrete realization environment (as: C language, Vxworks and PowerPC8260), define the data structure of NBAP protocol message.ASN.1 definition for its message of upper-layer protocol NBAP of 3GPP is very huge, complicated.Though the PER coding/decoding module has adopted ripe tool software to assist the function that realizes its encoding and decoding, the time of used PER encoding and decoding still is long with respect to the processing time of signaling process, and the NBAP signalling module also needs one by one information element to be taken out and carry out corresponding judgment to decoded information.If the transmission of Information that can reduce Iub interface just can reduce the time of NBAP signalling module in this process of processing.Because the data structure more complicated of transmitting channel information is nested very dark,, just can reduce the NBAP signalling module increases process to Radio Link processing time greatly if do not transmit these information at Iub interface.

Certainly Iub interface does not transmit transmitting channel information, has increased the processing complexity of Node B to a certain extent yet, because Node B need store the transmitting channel information of Radio Link, uses for Radio Link increase process.The storage of transmitting channel information and query and search will take the processing time of the certain memory headroom and the process of increasing.Increase process but the storage of transmitting channel information not only is used for Radio Link, other process also needs to use the transmitting channel information of storage.For example: if DCH (dedicated transmission channel) deletion information is arranged in the radio link reconfiguration message, reconfiguration course just need arrive DCH ID record whether in the NBAP signalling module of searching deletion in the NBAP signalling module, have only and write down this DCH, just can delete this DCH ID at Node B.In addition, if in the radio link reconfiguration message that RNC sends over, have only time window parameter or the uplink frame protocol mode of a DCH among the collaborative DCH to change, time window parameter or UL FP (up link Frame Protocol) pattern of other DCH among the collaborative DCH of this group also need to change so, and to give the Frame Protocol module DCH information configuration that has changed time window or uplink frame protocol mode, so needing NBAP to write down which DCH of this wireless links is collaborative DCH, which DCH is non-collaborative DCH, and the information of collaborative DCH is carried out corresponding modification.If Node B supports the Radio Link preemption function, also need the precedence information of each bar DCH in the NBAP signalling module record Radio Link.Therefore, NBAP storage DCH information can be used for multiple demand, has improved utilance, and then can improve the whole efficiency of system.In addition, storage organization and the index that the obtain DCH stored information load that can to greatest extent alleviate NBAP signaling process of the present invention by optimizing DCH reduces processing time of process query transmitting channel information as much as possible.

Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.

Claims

1. realize in the same base station method of user's switching between different districts for one kind, it is characterized in that described method comprises:

2. the method that the user is switched between different districts in the same base station of realization as claimed in claim 1 is characterized in that the predetermined way in the described steps A comprises:

A1, according to the measurement report of user terminal;

A2, according to the measurement report of base station;

A3, according to the load control algolithm.

3. the method that the user is switched between different districts in the same base station of realization as claimed in claim 1, it is characterized in that, described wireless link increasing request message comprises: local user's sign, cell number, diversity control information, coded combination transmission channel sign, gap information, code channel information and optional power control information, wherein, clear and definite diversity control information is set in the base station: newly-increased Radio Link does not make up with already present any wireless links.

4. the method that the user is switched between different districts in the same base station of realization as claimed in claim 3, it is characterized in that, described user radio link information table comprises: all users' information in the BTS management sub-district comprises: local user's sign, described user's local wireless sign, binding logo, the local sign of dedicated transmission channel, home cell numbering, the local sign of coded combination transmission channel, dedicated transmission channel, transport format combination set, power control information and code channel information.

5. the method that the user is switched between different districts in the same base station of realization as claimed in claim 4 is characterized in that described step C comprises:

6. the method that the user is switched between different districts in the same base station of realization as claimed in claim 5, it is characterized in that retrieving described user radio link information table according to described home cell numbering and local wireless sign and obtain the wireless link information that corresponding described user preserved and comprise among the described step C:

7. the method that the user is switched between different districts in the same base station of realization as claimed in claim 6 is characterized in that described step C22 comprises:

8. the method that the user is switched between different districts in the same base station of realization as claimed in claim 6 is characterized in that described step D comprises:

9. the method that the user is switched between different districts in the same base station of realization as claimed in claim 8 is characterized in that described step D2 comprises:

10. the method that the user is switched between different districts in the same base station of realization as claimed in claim 9 is characterized in that described step D23 comprises:

11. the method that the user is switched between different districts in the same base station of realization as claimed in claim 9, it is characterized in that, described step D also comprises: after described newly-increased Radio Link is set up successfully, increase the information of described new Radio Link in described user radio link information table.

12. the method that the user is switched between different districts in the same base station of realization as claimed in claim 11, it is characterized in that, described step e comprises: organize described Radio Link to increase response message according to described Radio Link switching mark, new Radio Link recorded information, described Radio Link is increased comprise new enhanced-dedicated transmission channel identification number and corresponding transmission bearer address in the response message.