CN101159893B - Distributed base station controller and its unit, data transmission method - Google Patents
Distributed base station controller and its unit, data transmission method Download PDFInfo
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Abstract
The invention discloses a distributed base station controller and a unit thereof and a data transmission method, wherein, the distributed base station controller includes a central unit and at least one pulling unit. The central unit is used to convert protocols of interactive signaling and business data between core network node and the pulling unit and perform operation processing in weak correlation with business for the pulling unit. The pulling unit is used to convert protocols of signaling and business data between the central unit and the base station, perform multi-drop merging and converging processing for received up data and sent to the central unit. When the pulling units are more than one, connect with the central unit respectively or in cascade connection with the central unit. The invention can realize flexible networking mode, deploy a SDU unit with multi-drop merging function in the distributed base station controller on a transmission converging node of wireless access network and improve the converging capability of the transmission converging node.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of distributed base station controller, a kind of center cell, a kind of extension unit, and the data transmission method in a kind of distributed base station controller.
Background technology
Current, most of metropolitan areas mobile transmission network is divided into the three-layer network structure: core layer, convergence-level and Access Layer.Core layer is deployed in the central office, is connected with the convergence layer node by fiber optic network; The convergence-level node deployment is in the central machine room or the module office of sub-district; Access Layer provides access interface for the user.
Core layer utilizes high-speed optical link interconnected, mainly provides the quick forwarding of network packet and the interconnection between the aggregation node.
Convergence-level mainly is made up of the transmission equipment that is positioned at base station cut-in convergent node and convergence point, is responsible for the interior service convergence in certain zone and dredges, and finishes the convergence of Access Layer flow.Problems such as the existence of convergence-level has avoided access point directly into core layer, and the Access Network span that causes is big, trunk optical fiber consumption is serious.
Access Layer is made up of the transmission equipment that is positioned at base station, data service access point and other Service Access points, is responsible for service access to each convergence-level node.
Fig. 1 is Radio Access Network (UMTS Territorial Radio Access Network, the UTRAN) structural representation of WCDMA (Wireless Code Division Multiple Addressing, wireless code division multiple address) system.(Radio Network System RNS) forms UTRAN, and RNS links to each other with core net by the Iu interface by the RNS collection.RNS comprises RNC (Radio Network Controller, radio network controller), and one or more Node B (base station).Node B supports FDD (FrequencyDivision Duplex, Frequency Division Duplexing (FDD)) pattern, TDD (Time Division Duplex, time division duplex) pattern or double mode, can handle one or more sub-districts, and link to each other with RNC by Iub interface.RNC is responsible for switching controls, the function of the combination/division of grand diversity between the different N that provides support ode B.Support the Node B of fdd mode to comprise optional grand diversity feature.RNC interconnects by the Iur interface, and Iur can directly link to each other or link to each other by suitable transmission network by the physical connection between RNC.
Fig. 2 has provided a kind of possible IS-95/cdma2000 network evolution form, be based upon existing IS-41 core net and improving among IS-634A RAN-CN interface standard on.Comprise BSC/PCF and BTS (Base Station Controlle, base transceiver station) in wireless access network shown in Figure 2 one side, the BSC/PCF entity is base station controller and PCF (grouping support node), and a BSC/PCF can administer a plurality of BTS.BTS can be distributed in different positions according to its disposal ability with performance, forms multistage base station and connects.For example, be connected with ODU (outdoor unit) 3601C below BTS3612A among Fig. 2 and the cBTS3612, be connected with the BTS3606 of next stage below the BTS3606.
From Fig. 1 and Fig. 2 as can be seen, no matter WCDMA system or cdma system all exist base station unit (be called NodeB in the WCDMA system, be called BTS in cdma system) and base station controller unit (be called RNC in WCDMA, be called BSC in CDMA).Existing mobile communication equipment provides producer, and the base station controller unit that provides is generally integrated unit, that is, (RNC/BSC) is as a whole for base station controller.
The inventor is in realizing process of the present invention, find this incorporate base station controller of the prior art, make in actual mobile network builds, reusing in a plurality of base station controllers partly can't be public, therefore in this case, system's networking cost is higher, and can't dispose flexibly base station controller according to the situation of transmission network.
Summary of the invention
Embodiments of the invention have disclosed a kind of distributed base station controller, and to realize flexible networking, this distributed base station controller comprises: center cell and at least one extension unit;
Described center cell is used to receive signaling and business datum that core net node sends, sends to described extension unit after this signaling and business datum are converted to distributed base station controller internal interface protocol signaling and business datum; Receive signaling and business datum that described extension unit sends, send to core net node after this signaling and business datum are converted to the signaling of core net node interface protocol and business datum; And described extension unit carried out and professional weak relevant operational processes;
Described extension unit is used to receive signaling and business datum that described center cell sends, carries out Business Processing and signaling process, and the business datum after will handling and signaling send to the base station after being converted to base-station interface protocol signaling and business datum; Receive business datum and signaling that described base station sends, carry out Business Processing and signaling process, and the business datum after will handling and signaling send to described center cell after being converted to the business datum of base station controller internal interface agreement and signaling.
Embodiments of the invention have also disclosed a kind of center cell of distributed base station controller, described distributed base station controller comprises and independent of service or weak relevant center cell, and the extension unit relevant with business, described center cell comprises: upstream Interface subelement, interconnected interface subelement and public services management subelement;
Described upstream Interface subelement is used to receive signaling or business datum that core net node sends, sends to described interconnected interface subelement after this signaling or business datum are converted to distributed base station controller internal interface protocol signaling or business datum; Receive signaling or business datum that described interconnected interface subelement sends, send to core net node after this signaling or business datum are converted to the signaling of core net node interface protocol or business datum;
Described interconnected interface subelement is used to receive signaling or the business datum that described upstream Interface subelement sends, and sends to extension unit; Receive signaling or business datum that extension unit sends, and send to described upstream Interface subelement;
Described public services management subelement is used for the information of the described extension unit that receives according to described interconnected interface subelement, and described extension unit is carried out the public services management.
Embodiments of the invention have also disclosed a kind of extension unit of distributed base station controller, described distributed base station controller comprises and independent of service or weak relevant center cell, and the extension unit relevant with business, described extension unit comprises: interconnected upstream Interface subelement, Business Processing subelement, signaling process subelement and downstream interface subelement.
Embodiments of the invention have also disclosed the data transmission method in a kind of distributed base station controller, be applied to distributed base station controller, described distributed base station controller comprises and independent of service or weak relevant center cell, and the extension unit relevant with business, and the method comprising the steps of:
The extension unit of distributed base station controller receives the business datum that downstream node sends; Described downstream node is and direct-connected base station of described extension unit or next stage extension unit;
The business datum that described extension unit will receive from base station direct-connected with it is carried out data exchange processing in this locality, after will being converted to the business datum of distributed base station controller internal interface agreement from the business datum that next stage extension unit direct-connected with it receives, carry out data exchange processing in this locality;
Perhaps, after will being converted to the business datum of distributed base station controller internal interface agreement from the multiple-limb business datum that base station direct-connected with it receives it is merged, to merge from the multiple-limb business datum that next stage extension unit direct-connected with it receives, and the business datum after will merging converges by statistic multiplexing, and the center cell that sends to described base station controller is handled.
Description of drawings
Fig. 1 is the structural representation of WCDMA system wireless access network in the prior art;
Fig. 2 is the schematic diagram of IS-95/CDMA2000 network evolution form in the prior art;
Fig. 3 A, Fig. 3 B and Fig. 3 C are the structural representation of center cell of the distributed base station controller of the embodiment of the invention one;
Fig. 4 A, Fig. 4 B and Fig. 4 C are the structural representation of extension unit of the distributed base station controller of the embodiment of the invention one;
Fig. 5 is the schematic diagram of the Business Processing subelement in the extension unit of the embodiment of the invention one;
Fig. 6 A, Fig. 6 B and Fig. 6 C are the structural representation of the distributed base station controller of the embodiment of the invention one;
Fig. 7 is the structural representation of extension unit cascade in the distributed base station controller of the embodiment of the invention one;
Fig. 8 A and Fig. 8 B are the schematic diagram based on the access network of distributed base station controller of the embodiment of the invention two;
Fig. 9 A and Fig. 9 B be the embodiment of the invention three utilize the schematic diagram of distributed base station controller as the access network of transmitting convergent node.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Embodiment one
Present embodiment has been described the structure of distributed base station controller, and the structure of center cell and extension unit.
Present mobile communication system, WCDMA/CDMA system for example, the part of its base station controller generally is made up of the logical gate of following indispensability:
Interface unit is used to provide the physical interface of up-downgoing, and upstream Interface and core net node carry out alternately, and carry out alternately downstream interface and base station;
Signaling Processing Unit is used to provide signaling processing ability;
Service Processing Unit is used to provide traffic handing capacity;
Operation and Maintenance Unit is used to provide system management function, such as functions such as configuration, alarm, maintenance, performance statisticses;
Clock unit is used to system that clock is provided.
Clock unit in the above unit and Operation and Maintenance Unit can be thought or weak relevant public services administrative unit irrelevant with Business Processing, Service Processing Unit then is the specialized processing units relevant with concrete business with signaling unit, therefore, present embodiment is divided into base station controller and the center cell of independent of service (or weak relevant) and the extension unit relevant with business in order to improve the extensibility of system.
But the common sparing that has comprised base station controller in the center cell, key component in this unit is by forming with the public services administrative unit of power system capacity irrelevant (or weak relevant), for example: clock subelement, Operation and Maintenance subelement etc., center cell does not need to increase in addition configuration under the situation of System Expansion.
Comprised the Business Processing part of base station controller in the extension unit, this unit is relevant with Business Processing, comprises signaling process subelement, Business Processing subelement etc.Professional different according to what handle, extension unit can have polytype, as SDU (Selection/Distribution Unit SDU, select Dispatching Unit), the SDU unit has the soft handover pooling function, can select one the tunnel top-qualityly from two soft handover branches of user terminal at SDU by SDU, deliver to core net on it.Extension unit with need carry how many sector carrier frequency, much processing flows are closely related, after sector carrier frequency number that system need support surpasses certain specification, need to increase corresponding extension unit.
Referring to Fig. 3 A, structural representation for the center cell of the distributed base station controller of the embodiment of the invention one, this center cell 10 comprises: upstream Interface subelement 11, interconnected interface subelement 12, clock subelement 13 and Operation and Maintenance subelement 14 (clock subelement 13 and Operation and Maintenance subelement 14 are formed public services management subelement), wherein:
Operation and Maintenance subelement 14, be used to receive the information of the aspects such as configuration, alarm, maintenance or performance statistics that the distributed base station controller extension unit transmitted by interconnected interface subelement 12 reports, and these information are sent to network management center by the interface with network management center carry out corresponding Operation and Maintenance and handle, if desired, also from the result and the configuration data at the interface receiving network managing center of network management center, the extension unit that sends in the distributed base station controller by interconnected interface subelement 12 then.Operation and Maintenance subelement 14 generally also comprises a near-end maintaining subelement, so that the near-end maintaining of system.
Can as required center cell be expanded.Center cell also can comprise the service processing function of some extension units,, can comprise one or more dedicated services processing subelements in the center cell that is.Fig. 3 B has provided the structural representation that comprises in the center cell when dedicated service is handled subelement.Shown in Fig. 3 B, this center cell 10 ' also comprises a dedicated service processing subelement 30 on the basis of Fig. 3 A, and dedicated service is handled subelement 30 and comprised Business Processing subelement 33 and signaling process subelement 34;
Center cell can also directly be connected with the base station, utilize the dedicated service in the center cell to handle the data of subelement 30 processing base stations, like this, just need in center cell, comprise the downstream interface subelement, with the data of transceiver base station, Fig. 3 C provided can with the structural representation of the center cell of base station direct communication.Shown in Fig. 3 C, at center cell 10 " in comprise a downstream interface subelement 15.
Referring to Fig. 4 A, structural representation for the extension unit of the distributed base station controller of the embodiment of the invention one, this extension unit 20 comprises: downstream interface subelement 21, interconnected upstream Interface subelement 22, Business Processing subelement 23, and signaling process subelement 24, wherein:
Interconnected upstream Interface subelement 22 is used for being connected with center cell.Interconnected upstream Interface subelement 22 adopts the internal interface agreement of distributed base station controller to communicate.But the business datum that interconnected upstream Interface subelement 22 receiving center unit send, and send to Business Processing subelement 23, the signaling that the receiving center unit sends, and send to signaling process subelement 24.Interconnected upstream Interface subelement 22 can also send to center cell with the business datum or the signaling of Business Processing subelement 23 and 24 transmissions of signaling process subelement.
All right cascade between the extension unit, the extension unit inside of realizing cascade also needs an interconnected downstream interface subelement 25, in the extension unit 20 ' shown in Fig. 4 B, the interconnected upstream Interface subelement wired connection of the extension unit of interconnected downstream interface subelement 25 and next stage (as by cable or access network) is to realize data interaction.
Extension unit can have many kinds according to the difference of the concrete business that realizes, for example, realizes that Business Processing subelement 23 wherein can comprise as shown in Figure 5 with the extension unit of multiple-limb merging and traffic aggregation:
Multiple-limb merges subelement 233, is used for the multiple-limb business datum that receives is merged, and sends to the data recombination subelement; This subelement can also be subdivided into local multiple-limb and merge subelement 2331 and downstream multiple-limb merging subelement 2332.Local multiple-limb merges subelement 2331 and is used for the data that this extension unit is received from base station direct-connected with it are carried out the multiple-limb merging, and the downstream multiple-limb merges subelement 2332 and is used for the data that this extension unit receives from its next stage extension unit are carried out the multiple-limb merging;
Also can comprise local commutator unit 235 in the Business Processing subelement 23 of extension unit, be used for the conversation between the user is finished in this locality the exchange of Business Stream.For local flow, the conversation between the user herein is meant the conversation between the user who is had jurisdiction over this direct-connected base station of extension unit, and these user traffic flow are used identical vocoder; For downstream flow, the conversation between the user herein is meant the conversation between user between the next stage extension unit of extension unit, and these user traffic flow are used identical vocoder.
Because can carrying out the local data exchange, handles extension unit, for fear of the extension unit traffic overload, extension unit inside can also comprise a resource management subelement, extension unit 20 shown in Fig. 4 C " in, resource management subelement 26 is used for carrying out load allocating according to the traffic handing capacity of this extension unit.Resource management subelement 26 handles to the veneer of local extension unit load allocating as far as possible, when resource management subelement 26 detects 23 loads of Business Processing subelement when overweight (as the cpu load that detects extension unit arrives preset threshold value), can be distributed to center cell to a part of load by interconnected interface subelement 22 and handle.
Above-mentioned center cell and extension unit have been formed distributed base station controller.
The distributed base station controller of present embodiment comprises center cell, and comprises an extension unit at least.Can directly be connected by cable or optical cable between center cell and extension unit, also can be undertaken interconnected by transmission network.Can be connected by transmission network between the interconnected interface subelement of center cell and the interconnected upstream Interface subelement of extension unit, adopt distributed base station controller internal interface agreement to communicate.
Center cell in the distributed base station controller and extension unit can independently be disposed, and a center cell can connect a plurality of extension units.Center cell can also make up with extension unit, thereby constitute a mixture, in this way, not only can realize existing base station controller framework (be about to center cell and all extension units and lump together placement), the novel system architecture of freely expanding can also be provided.Adopt this distributed base station controller framework, can bring convenience for the mobile communication system dilatation, when power system capacity promoted, the extension unit that can increase side of base station controller flexibly carried out dilatation.
The spread scenarios different according to center cell, distributed base station controller can be shown in Fig. 6 A, Fig. 6 B and Fig. 6 C.
Distributed base station controller shown in Fig. 6 A, form by a center cell 10 and a plurality of extension unit 20, can be connected by transmission network between the interconnected interface subelement of center cell 10 and the interconnected upstream Interface subelement of extension unit, adopt distributed base station controller internal interface agreement to communicate.The subelement that comprises realization public services management functions such as clock subelement 13, Operation and Maintenance subelement 14 in the center cell 10.
Distributed base station controller shown in Fig. 6 B, be on the distributed base station controller basis shown in Fig. 6 A, in the center cell 10 ' except that comprising that clock subelement 13, Operation and Maintenance subelement 14 etc. realize the subelement of public services management functions, its inside also can comprise realize the dedicated service processing capacity zoom out subelement 30, make center cell 10 ' can realize the function of part extension unit.
Distributed base station controller shown in Fig. 6 C, be on the basis of the distributed base station controller shown in Fig. 6 B, center cell 10 " inside also comprises downstream interface subelement 15; make center cell 10 " the inner subelement 30 that zooms out is connected with the base station by this downstream interface subelement 15, make this center cell 10 " can be directly and base station communication, and carry out control corresponding and management by the 30 pairs of base stations of subelement of zooming out of inside.
According to whether cascade of the extension unit in the distributed base station controller, distributed base station controller can be as shown in Figure 7.In distributed base station controller shown in Figure 7, extension unit can multi-stage cascade, the situation of only having drawn two-stage cascade among the figure, as shown in Figure 7, extension unit is connected with extension unit 4 and extension unit 5 for 1 time, and extension unit 1 can also connect one or more base stations (only draw among the figure and connect the situation of 1 base station).Wherein, the structure of extension unit 1 can be shown in 4B, and the structure of extension unit 4 or extension unit 5 can be shown in Fig. 4 A or Fig. 4 C, and center cell can be shown in Fig. 3 A, Fig. 3 B or Fig. 3 C.
Embodiment two
Present embodiment has been described the Radio Access Network networking structure based on distributed base station controller, and the handling process of distributed base station controller.
Referring to Fig. 8 A, for the embodiment of the invention two based on one of schematic diagram of the access network of distributed base station controller, in this access network, comprise a center cell C_BSC, can directly connect BTS under the C_BSC, also can connect one or more extension unit R_BSC, a R_BSC can converge several base stations, and realizes the call treatment of these base stations.Wherein,
C_BSC mainly provides the common functions of base station controller.Can comprise one or more C_BSC in the access network.C_BSC inside also can be matched some as required and zoom out subelement.Generally speaking,, C_BSC can be deployed in the key city, as being deployed in same machine room with MGW (MediaGateWay, media gateway)/MSCe (mobile soft handover center) according to principle easy to maintenance.
R_BSC mainly provides the service processing function of base station controller.R_BSC can with BTS or Transmission Convergence deployed with devices at same machine room.
C_BSC and R_BSC form distributed base station controller, and this distributed base station controller structure can be as described in the embodiment one.In the access network shown in Fig. 8 A, for the WCDMA system, the handling process of C_BSC (its structure can as shown in Figure 3A) is:
On the signaling plane of down direction, the upstream Interface subelement of C_BSC will carry out protocol conversion from the signaling that IuCS or IuPS interface receive, and be forwarded to corresponding R_BSC by interconnected interface subelement and handle; On the service surface, the business datum that the upstream Interface subelement of C_BSC receives IuCS or IuPS interface is converted to the form of C_BSC and R_BSC internal interface agreement, and is transmitted to corresponding R_BSC by interconnected interface subelement and handles;
On the signaling plane of up direction, the internal interface protocol signaling that the upstream Interface subelement of C_BSC will be sent by the R_BSC that interconnected interface subelement receives is converted to the signaling of IuCS or IuPS interface protocol, and is transmitted to equipment of the core network; On service surface, the business datum of the internal interface agreement that the upstream Interface subelement of C_BSC will be sent by the R_BSC that interconnected interface subelement receives is converted to the business datum of IuCS or IuPS interface protocol, and is transmitted to equipment of the core network;
On the Operation and Maintenance face, the interconnected interface subelement of C_BSC will be collected from the alarm of R_BSC, the information of aspects such as performance statistics sends to the Operation and Maintenance subelement, and, simultaneously configuration data is handed down to each R_BSC by Operation and Maintenance subelement, interconnected interface subelement by SCN Space Cable Network administrative center on it.
In the access network shown in Fig. 8 A, for cdma system, the flow process in the basic and above-mentioned WCDMA of the handling process of C_BSC (its structure can the as shown in Figure 3A) system is identical, and difference is:
Because the upstream Interface subelement of C_BSC is on signaling plane, be connected with equipment of the core network by A1/A1p or A9/A11 interface, therefore, this upstream Interface subelement is changed between A1/A1p or A9/A11 interface protocol form and distributed base station controller internal interface protocol format when the transmitting-receiving signaling mutually.Because the upstream Interface subelement of C_BSC is on service surface, be connected with equipment of the core network by the A2/A2p/A8/A10 interface, therefore, this upstream Interface subelement is changed between A2/A2p/A8/A10 interface protocol form and distributed base station controller internal interface protocol format when the transmitting and receiving service data mutually.
In the access network shown in Fig. 8 A, for the WCDMA system, the handling process of R_BSC (its structure can shown in Fig. 4 C) is:
On the signaling plane of down direction, the interconnected upstream Interface subelement of R_BSC will send to the signaling process subelement from the signaling of C_BSC and handle, send to the downstream interface subelement then, the signaling after will being handled by it is converted into the Iub interface signaling format, is handed down to NodeB; The signaling process subelement of R_BSC is also realized RRM simultaneously; On service surface, the interconnected upstream Interface subelement of R_BSC will send to the Business Processing subelement from the business datum of C_BSC and handle, send to the downstream interface subelement then, the business datum after will being handled by it is converted into the Iub interface data format, is handed down to NodeB.For the situation that has soft handover branches, can also business datum be sent simultaneously in a plurality of branches by the Business Processing subelement in the extension unit of corresponding R_BSC.
On the signaling plane of up direction, the signaling that the downstream interface subelement of R_BSC is sent Iub interface is converted into the inside story form, and with after the processing of signaling process subelement, is transmitted to C_BSC by interconnected upstream Interface subelement; On service surface, the business datum that the downstream interface subelement of R_BSC is sent Iub interface is converted into the inside story form, and after the Business Processing subelement is handled, as realize that grand diversity merges, and is transmitted to C_BSC by interconnected upstream Interface subelement;
On the Operation and Maintenance face, R_BSC collects alarm, the information of aspects such as performance statistics, and, accept the configuration data that C_BSC issues simultaneously by delivering to C_BSC on the interface between C_BSC and R_BSC;
In the access network shown in Fig. 8 A, for cdma system, the flow process in the basic and above-mentioned WCDMA of the handling process of the R_BSC system is identical, and difference is:
Because the downstream interface subelement of R_BSC is on the signaling plane and on the service surface, be connected with the base station by Abis interface, therefore, this downstream interface subelement is changed between Abis interface protocol format and distributed base station controller internal interface protocol format when transmitting-receiving signaling and business datum mutually.
Referring to Fig. 8 B, for the embodiment of the invention two based on two of the schematic diagram of the access network of distributed base station controller.Access network structure shown in Fig. 8 B is on the basis of Fig. 8 A, and R_BSC carries out multi-stage cascade, and a R_BSC can converge R_BSC and a plurality of base station of several next stage.Shown in Fig. 8 B, R_BSC1 (its structure can shown in Fig. 4 B) is connected with R_BSC4 and R_BSC5 (structure of R_BSC4 and R_BSC5 can respectively shown in Fig. 4 A or 4C), and BTS.The handling process of its signaling or data and above-mentioned flow process are similar.Because the communication protocol that the interconnected downstream interface subelement of R_BSC1 and the interconnected upstream Interface subelement of R_BSC4 or R_BSC5 are adopted all is the internal agreement of this distributed base station controller, therefore do not need to carry out protocol conversion.
The R_BSC base station deployment of can trying one's best, like this, because the control path contraction, thereby help to promote wireless network performance.A R_BSC is disposed in the area that can relatively concentrate in the base station, converges to master controller step by step by the multi-stage cascade mode again.Can dispose flexibly according to the characteristics of transmission network.
The reason that cascade network produces is relevant with transmission network, if establishing wireless network is located at the area that population relatively disperses, the user is fewer, if adopt non-distributed networking mode, the scope of a controller covering is very big, backwoodsman base station is very far away to the distance of controller, is suitable for multi-stage cascade under this scene and converges step by step.Another scene be user distribution at a kind of belt-like zone, cover or the covering of compact community, both sides, river such as the traffic route, also be suitable for multi-stage cascade under this scene and converge step by step.
In the present embodiment, C_BSC can independent dilatation, and the quantity of R_BSC also can increase as required, and is therefore very flexible based on the access network system framework of this distributed base station controller.R_BSC is because the simplification of capacity and function, so volume can reduce, and is also just more flexible when arranging net.
After the base station controller realization was distributed, extension unit can be disposed flexibly, can require be deployed to any position according to network performance demand and transport network architecture.In order to reduce the expense that transmission network is rented by operator, can the extension unit of aggregation feature will be had in the distributed base station controller, as the SDU unit with soft handover pooling function, be deployed on the aggregation node in the transmission network, reach the purpose that reduces resource occupation and reduce expense.
In present mobile communication (as the CDMA/WCDMA/GSM system) transmission group net, transmission network usually is divided into the access part of " last kilometer ", and metropolitan area backbone transport network; " last kilometer " access way is diversified, at present based on microwave transmission.Under microwave transmission networking situation, substantially all there is a transmitting convergent node, the setting of this Transmission Convergence point can be reduced to the resource requirement of transmission network.
Embodiment three
Present embodiment has been described the wireless accessing network structure of the SDU unit with soft handover pooling function in the distributed base station controller being transferred to transmitting convergent node, and data handling procedure.
Referring to Fig. 9 A, utilize extension unit (SDU unit) in the distributed base station controller as one of schematic diagram of the access network of transmitting convergent node with soft handover pooling function for the embodiment of the invention three.In this access network, comprise a plurality of BTS, wherein a part of BTS converges to R_BSC1 (its structure can shown in Fig. 4 A or Fig. 4 C), part BST converges to R_BSC2 (its structure can shown in Fig. 4 A or Fig. 4 C), and R_BSC1 and R_BSC2 are through linking C_BSC (its structure can shown in Fig. 3 A, Fig. 3 B or Fig. 3 C) on the transmission network (for example synchronous digital transmission network SDN transmission network).Wherein C_BSC is a center cell; R_BSC1 and R_BSC2 are respectively extension unit, and R_BSC1 is a SDU unit with soft handover pooling function, and R_BSC1 is positioned at transmitting convergent node.The base station can be 1 * S222, supports 168TCE, is configured to 2 E1.
WCDMA system and CDMA2000 communication system, owing to support soft handover, so a unit that is called SDU is arranged in the distributed base station controller.The SDU unit is selected one the tunnel top-quality by SDU at SDU from two soft handover branches of MS/UE (user terminal), send core net on then.Because the soft handover pooling function of SDU makes that the resource requirement of SDU both sides is different, SDU down direction (toward base station side) needs more transfer resource than up direction (toward the core net direction).
In the present embodiment, R_BSC1 is based on the extension unit of the SDU processing unit with soft handover pooling function, and R_BSC1 is positioned over transmitting convergent node, can utilize the grand diversity pooling function of SDU itself, after making that a plurality of branches merge, go up transmission network again.
The process that R_BSC1 converges data is:
The downstream interface subelement of R_BSC1 receives business datum and the signaling that the base station sends, and business datum and signaling are converted to the business datum and the signaling format of distributed base station controller internal interface agreement, and the business datum after the protocol conversion sent to the Business Processing subelement of R_BSC1, the signaling after the protocol conversion is sent to the signaling process subelement; Comprise the multiple-limb data in the business datum that the downstream interface subelement receives;
The Business Processing subelement of R_BSC1 can comprise that multiple-limb merges subelement and data recombination subelement.Multiple-limb merges subelement and utilizes the grand diversity pooling function of self, selects one the tunnel top-qualityly for the multiple-limb data in the business datum, and multiple-limb is merged processing, sends to the data recombination subelement then; The data recombination subelement can be packed to business datum again, after receiving the up frame of eating dishes without rice or wine, the data recombination subelement reorganizes uplink frame, can adopt long packet mode, be about to a plurality of business data packet and break into a uplink business data bag, the business data packet after will handling then sends to the interconnected interface subelement of R_BSC1.The Business Processing subelement of R_BSC1 also can comprise the convergence subelement, and this subelement can receive the packet of data recombination subelement reorganization, carry out traffic aggregation by statistic multiplexing after, send to C_BSC by interconnected interface subelement.
The Business Processing subelement of R_BSC1 also can comprise local commutator unit, and this subelement is used for handling does not need to deliver to core net or other network equipment, and the business datum that can handle by this locality.For example,, can directly finish the exchange of Business Stream by this R_BSC1, not go to handle and do not need to deliver to core net, thereby saved the part bandwidth, also can reduce network delay in this locality in the talk business of calling out after connecting foundation for the user who uses identical vocoder.
After the signaling process subelement of R_BSC1 receives business datum, carry out signaling process, and the signaling after will handling sends to the interconnected interface subelement of R_BSC1;
The interconnected interface subelement of R_BSC1 sends it to C_BSC after receiving business datum and signaling after the processing.
In said process, because the SDU branch that terminated, last when sending core net, can pack to business datum again, adopt long packet mode, a plurality of business data packet are broken into a uplink business data bag, like this, the ratio that accounts for of the overhead-bits of each business data packet reduces greatly; In addition, because a plurality of packets have synthesized a packet, make the quantity of uplink packet reduce greatly, like this, the quantity of the bag on the SDH transmission network has just reduced significantly.Thus, rent or self-built SDH transport network resources can reduce significantly.
In the present embodiment, can will have distribution and select the R_BSC (as SDU unit) of processing capacity to be placed on the suitable transmitting convergent node according to network topology structure with soft handover function.In the mobile communications network, tree group network and chain networking are arranged at present.For tree group network, this R BSC can be placed on branch to the trunk place, near the place of backbone transport net, as access part at " last kilometer "; For chain networking, this R_BSC can be placed on the place between chain and the backbone transport networks.
Because extension unit can multi-stage cascade, himself also can connect the base station, therefore, extension unit is called downstream flow from the flow process that its next stage extension unit receives, and the flow that will receive from the base station of its connection is called local flow.Be in the extension unit of aggregation node, the local flow that receives is directly handled in this locality, upload after the downstream flow (non-local flow) that receives is converged.
Referring to Fig. 9 B, utilize extension unit (SDU unit) in the distributed base station controller as two of the schematic diagram of the access network of transmitting convergent node for the embodiment of the invention three, this access network is on the basis of Fig. 9 A, R_BSC1 (its structure can shown in Fig. 4 B) level is associated with R_BSC3 (its structure can shown in Fig. 4 A or Fig. 4 C) and R_BSC4 (its structure can shown in Fig. 4 A or Fig. 4 C), and R_BSC1 also can directly be connected with BTS.
When R_BSC1 carries out convergence processing to the business datum that receives, handle respectively for local flow and downstream flow, its processing procedure is:
The local flow that receives for the base station of R_BSC1 below it, merge subelement by the local multiple-limb among the R_BSC1 and carry out multiple-limb merging processing, downstream flow for R_BSC3 and R_BSC4 from this its next stage of R_BSC1 receive merges subelement by the downstream multiple-limb among the R_BSC1 data between the user that user and R_BSC4 had jurisdiction over that R_BSC3 had jurisdiction over is carried out multiple-limb merging processing.Data flow after local multiple-limb merging subelement and downstream multiple-limb merging subelement will merge sends to the data recombination subelement and repacks, data after the data recombination subelement will be packed send to the traffic aggregation subelement and carry out statistic multiplexing, send to interconnected interface subelement then.Simultaneously, the local commutator unit of R_BSC1 carries out this locality exchange for the communicating data between the user in the local flow, has jurisdiction over communicating data between the user for user that R_BSC3 has jurisdiction in the downstream flow and R_BSC4 and carries out this locality and exchange.Said herein local exchange is meant uses the user service flow of identical vocoder can directly finish the exchange of Business Stream in extension unit, does not go to handle and do not need to deliver to core net.
Handle because R_BSC1 can carry out this locality exchange to the talk business between the user, therefore the resource management subelement can be set in R_BSC1 inside, to realize monitoring and distribution to the R_BSC1 business load.When the business load that monitors R_BSC1 when the resource management subelement reaches preset threshold value, the partial service data can be sent to C_BSC1 and handle,, reach the purpose of resource-sharing to alleviate the load of R_BSC1, and the guaranteed service quality.
Have distribution and select the R_BSC (as the SDU unit) of processing capacity also can be arranged on the transmitting convergent node of existing network, realize the multiple-limb pooling function, strengthen the aggregate capabilities of transmitting convergent node.In this case, comprise the upstream Interface subelement in the SDU unit, by the network entity on transmission network and the up direction, as the R_BSC or the C_BSC of upper level, the data upload that will carry out after multiple-limb merges is handled to the network entity of upper level.
In the embodiment of the invention, the combination of disposing by the transmitting convergent node in R_BSC and the conventional wireless access network, make transmission network and mobile communications network present to a certain degree fusion, thereby in mobile networking, save system resource more and improve wireless network performance.R_BSC in the embodiment of the invention can realize local function of exchange, with further saving part bandwidth, reduces network delay; Resource management function among the R_BSC can be realized resource-sharing, to guarantee quality of service.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (21)
1. the center cell of a distributed base station controller, described distributed base station controller comprises and independent of service or weak relevant center cell, and the extension unit relevant with business, it is characterized in that described center cell comprises: upstream Interface subelement, interconnected interface subelement and public services management subelement;
Described upstream Interface subelement is used to receive signaling or business datum that core net node sends, sends to described interconnected interface subelement after this signaling or business datum are converted to distributed base station controller internal interface protocol signaling or business datum; Receive signaling or business datum that described interconnected interface subelement sends, send to core net node after this signaling or business datum are converted to the signaling of core net node interface protocol or business datum;
Described interconnected interface subelement is used to receive signaling or the business datum that described upstream Interface subelement sends, and sends to extension unit; Receive signaling or business datum that extension unit sends, and send to described upstream Interface subelement;
Described public services management subelement is used for the information of the described extension unit that receives according to described interconnected interface subelement, and described extension unit is carried out the public services management.
2. center cell as claimed in claim 1 is characterized in that, described public services management subelement comprises:
The clock subelement is used for the information according to the described extension unit that receives, and sends to described interconnected interface subelement to be used to indicate described extension unit to carry out the instruction of clock synchronization;
The Operation and Maintenance subelement is used for the information according to the described extension unit that receives, and described extension unit is carried out Operation and Maintenance handle.
3. center cell as claimed in claim 1 is characterized in that, described center cell also comprises dedicated service processing subelement, and described dedicated service is handled subelement and comprised:
The Business Processing subelement is used to receive the business datum that described upstream Interface subelement sends, and carries out sending to described interconnected interface subelement after the Business Processing; Receive the business datum that described interconnected interface subelement sends, carry out sending to described upstream Interface subelement after the Business Processing;
The signaling process subelement is used to receive the signaling that described upstream Interface subelement sends, and carries out sending to described interconnected interface subelement after the signaling process; Receive the signaling that described interconnected interface subelement sends, carry out sending to described upstream Interface subelement after the signaling process.
4. center cell as claimed in claim 3 is characterized in that, described center cell also comprises:
The downstream interface subelement is used to receive the business datum that described Business Processing subelement sends, and receives the signaling that described signaling process subelement sends, and sends to the base station after being converted into the base-station interface protocol signaling; Receive signaling and business datum that the base station sends, and send to described signaling process subelement and described Business Processing subelement respectively after being converted into the signaling of distributed base station controller internal agreement and business datum.
5. the extension unit of a distributed base station controller, described distributed base station controller comprises and independent of service or weak relevant center cell, and the extension unit relevant with business, it is characterized in that described extension unit comprises: interconnected upstream Interface subelement, Business Processing subelement, signaling process subelement and downstream interface subelement;
Described interconnected upstream Interface subelement is used for signaling and business datum that the receiving center unit sends, and sends to described Business Processing subelement and described signaling process subelement respectively;
Described Business Processing subelement is used to receive the business datum that described interconnected upstream Interface subelement sends, and carries out sending to described downstream interface subelement after the Business Processing; Receive the business datum that described downstream interface subelement sends, carry out sending to described interconnected upstream Interface subelement after the Business Processing;
Described signaling process subelement is used to receive the signaling that described interconnected interface subelement sends, and carries out sending to described downstream interface subelement after the signaling process; Receive the signaling that described downstream interface subelement sends, carry out sending to described interconnected upstream Interface subelement after the signaling process;
Described downstream interface subelement is used to receive the business datum that described Business Processing subelement sends, and receives the signaling that described signaling process subelement sends, and sends to the base station after this business datum and signaling are converted to the business datum of base-station interface agreement and signaling; Receive signaling and business datum that the base station sends, send to described signaling process subelement and described Business Processing subelement respectively after this signaling and business datum are converted to distributed base station controller internal interface protocol signaling and business datum.
6. extension unit as claimed in claim 5 is characterized in that, described Business Processing subelement comprises:
Multiple-limb merges subelement, and the multiple-limb business datum that is used for receiving merges;
The data recombination subelement is used for the business datum that described multiple-limb merges after subelement merges is repacked, and a plurality of business data packet is packaged as a business data packet, and sends to described convergence subelement.
7. extension unit as claimed in claim 6 is characterized in that, described Business Processing subelement also comprises:
The convergence subelement is used for the business datum after the described data recombination subelement processing is carried out statistic multiplexing, and sends to described interconnected interface subelement.
8. extension unit as claimed in claim 6 is characterized in that, described multiple-limb merges subelement and comprises:
Local multiple-limb merges subelement, is used for that the multiple-limb business datum that is sent with the direct-connected base station of described extension unit is carried out multiple-limb and merges and handle;
The downstream multiple-limb merges subelement, and the multiple-limb business datum that the next stage extension unit that is used for being connected with described extension unit is sent is carried out multiple-limb and merged processing.
9. extension unit as claimed in claim 6 is characterized in that, described Business Processing subelement also comprises:
Local commutator unit, be used for with user that the direct-connected base station of described extension unit is had jurisdiction between have an identical vocoder the talk business data carry out exchanges data; Perhaps, will with user that the direct-connected a plurality of next stage extension units of described extension unit are had jurisdiction between have an identical vocoder the talk business data carry out exchanges data.
10. extension unit as claimed in claim 5 is characterized in that, described extension unit also comprises:
The resource management subelement is used for the handled business datum of described Business Processing subelement being sent to center cell by described upstream Interface subelement handling when the load that monitors described Business Processing subelement surpasses threshold value.
11. extension unit as claimed in claim 5 is characterized in that, described extension unit also comprises:
Interconnected downstream interface subelement, be used to receive signaling or business datum that the interconnected upstream Interface subelement of next stage extension unit sends, and send the signaling process subelement and the Business Processing subelement of this extension unit respectively, or send to the interconnected upstream Interface subelement of this extension unit; From the Business Processing subelement and the signaling process subelement of this extension unit, or interconnected internally upstream Interface subelement receives signaling or business datum, and sends to the interconnected upstream Interface subelement of described next stage extension unit.
12. a distributed base station controller is characterized in that, comprising: center cell and at least one extension unit;
Described center cell is used to receive signaling and business datum that core net node sends, sends to described extension unit after this signaling and business datum are converted to distributed base station controller internal interface protocol signaling and business datum; Receive signaling and business datum that described extension unit sends, send to core net node after this signaling and business datum are converted to the signaling of core net node interface protocol and business datum; And described extension unit carried out and professional weak relevant operational processes;
Described extension unit is used to receive signaling and business datum that described center cell sends, carries out Business Processing and signaling process, and the business datum after will handling and signaling send to the base station after being converted to base-station interface protocol signaling and business datum; Receive business datum and signaling that described base station sends, carry out Business Processing and signaling process, and the business datum after will handling and signaling send to described center cell after being converted to the business datum of base station controller internal interface agreement and signaling.
13. distributed base station controller as claimed in claim 12 is characterized in that, described extension unit is a plurality of, and described a plurality of extension units are connected with described center cell respectively, is connected with described center cell after perhaps described a plurality of extension unit cascades; Part in perhaps described a plurality of extension units is connected with described center cell, is connected with described center cell after another part cascade.
14. distributed base station controller as claimed in claim 12 is characterized in that, described center cell comprises: upstream Interface subelement, interconnected interface subelement, public services management subelement;
Described upstream Interface subelement is used to receive signaling or the business datum that core net node sends, and carries out sending to described interconnected interface subelement after the protocol conversion; Receive signaling or business datum that described interconnected interface subelement sends, carry out sending to core net node after the protocol conversion;
Described interconnected interface subelement is used to receive signaling or the business datum that described upstream Interface subelement sends, and sends to extension unit; Receive signaling or business datum that extension unit sends, and send to described upstream Interface subelement;
Described public services management subelement is used for the information of the described extension unit that receives according to described interconnected interface subelement, and described extension unit is carried out the public services management.
15. distributed base station controller as claimed in claim 14 is characterized in that, described center cell also comprises:
Dedicated service is handled subelement, is used to receive business datum and the signaling that described upstream Interface subelement sends, and carries out sending to described downstream interface subelement after Business Processing and the signaling process; Receive business datum and signaling that described downstream interface subelement sends, carry out sending to described upstream Interface subelement after Business Processing and the signaling process;
The downstream interface subelement is used to receive described dedicated service and handles business datum and the signaling that subelement sends, and carries out sending to the base station after the protocol conversion; Receive business datum and signaling that the base station sends, carry out sending to described dedicated service processing subelement after the protocol conversion.
16. distributed base station controller as claimed in claim 12 is characterized in that, described extension unit comprises: interconnected upstream Interface subelement, Business Processing subelement, signaling process subelement and downstream interface subelement;
Described interconnected upstream Interface subelement is used for signaling and business datum that the receiving center unit sends, and sends to described Business Processing subelement and described signaling process subelement respectively;
Described Business Processing subelement is used to receive the business datum that described interconnected upstream Interface subelement sends, and carries out sending to described downstream interface subelement after the Business Processing; Receive the business datum that described downstream interface subelement sends, carry out sending to described interconnected upstream Interface subelement after the Business Processing;
Described signaling process subelement is used to receive the signaling that described interconnected upstream Interface subelement sends, and carries out sending to described downstream interface subelement after the signaling process; Receive the signaling that described downstream interface subelement sends, carry out sending to described interconnected upstream Interface subelement after the signaling process;
Described downstream interface subelement is used to receive the business datum that described Business Processing subelement sends, and receives the signaling that described signaling process subelement sends, and carries out sending to the base station after the protocol conversion; Receive signaling and business datum that the base station sends, carry out sending to described signaling process subelement and described Business Processing subelement respectively after the protocol conversion.
17. distributed base station controller as claimed in claim 16 is characterized in that, described extension unit also comprises:
Interconnected downstream interface subelement, be used to receive signaling or business datum that the interconnected upstream Interface subelement of next stage extension unit sends, and send the signaling process subelement and the Business Processing subelement of this extension unit respectively, or send to the interconnected upstream Interface subelement of this extension unit; From the Business Processing subelement and the signaling process subelement of this extension unit, or interconnected internally upstream Interface subelement receives signaling or business datum, and sends to the interconnected upstream Interface subelement of described next stage extension unit.
18. distributed base station controller as claimed in claim 16 is characterized in that, described extension unit also comprises:
The resource management subelement is used for the handled partial service data of described Business Processing subelement being sent to center cell by described upstream Interface subelement handling when the load that monitors described Business Processing subelement surpasses threshold value.
19. the data transmission method in the distributed base station controller, be applied to distributed base station controller, described distributed base station controller comprises and independent of service or weak relevant center cell, and the extension unit relevant with business, it is characterized in that the method comprising the steps of:
The extension unit of distributed base station controller receives the business datum that downstream node sends; Described downstream node is and direct-connected base station of described extension unit or next stage extension unit;
The business datum that described extension unit will receive from base station direct-connected with it is carried out data exchange processing in this locality, after will being converted to the business datum of distributed base station controller internal interface agreement from the business datum that next stage extension unit direct-connected with it receives, carry out data exchange processing in this locality;
Perhaps, after will being converted to the business datum of distributed base station controller internal interface agreement from the multiple-limb business datum that base station direct-connected with it receives it is merged, to merge from the multiple-limb business datum that next stage extension unit direct-connected with it receives, and the business datum after will merging converges by statistic multiplexing, and the center cell that sends to described base station controller is handled.
20. method as claimed in claim 19 is characterized in that, described extension unit is handled described business datum and is comprised in this locality:
Described business datum is the business datum that sends with the direct-connected base station of described extension unit, and described business datum is that described extension unit carries out data exchange processing with described business datum when having the talk business data of identical vocoder between the user that has jurisdiction over of described base station in this locality;
Perhaps, described business datum is the business datum that sends with the direct-connected next stage extension unit of described extension unit, and described business datum is that described extension unit carries out data exchange processing with described business datum when having the talk business data of identical vocoder between the user that had jurisdiction over of described each next stage extension unit in this locality.
21. method as claimed in claim 20 is characterized in that, when the load of described extension unit reaches threshold value, further comprises: the described business datum of part is sent to described center cell handle.
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| CN2007101300696A CN101159893B (en) | 2007-03-31 | 2007-07-30 | Distributed base station controller and its unit, data transmission method |
| PCT/CN2008/070590 WO2008119295A1 (en) | 2007-03-31 | 2008-03-26 | Distributed base station controller and unit thereof, and data transimitting method |
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| CN200710096228.5 | 2007-03-31 | ||
| CNA2007100962285A CN101052003A (en) | 2007-03-31 | 2007-03-31 | Base station controller system and device, radio access net and data transmitting method |
| CN2007101300696A CN101159893B (en) | 2007-03-31 | 2007-07-30 | Distributed base station controller and its unit, data transmission method |
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| FI20135462L (en) * | 2013-05-03 | 2014-11-04 | Tellabs Oy | Mesh elements in software-defined mesh |
| CN103702310A (en) * | 2013-12-30 | 2014-04-02 | 成都道永网络技术有限公司 | Multi-interface data merge implementation method |
| KR102061773B1 (en) * | 2014-12-29 | 2020-01-02 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Configuration Methods, SDN-Based Data Transfer Methods, and Network Controllers for SDN and SDN |
| CN109691168B (en) * | 2016-09-30 | 2020-10-23 | 华为技术有限公司 | Method, equipment and system for processing control signaling |
| CN110740197B (en) * | 2018-07-20 | 2021-03-12 | 大唐移动通信设备有限公司 | Core network equipment, core network system and communication method |
| CN109413765B (en) * | 2018-11-22 | 2019-06-18 | 广州开信通讯系统有限公司 | Extendible capacity formula access device and digital fiber compartment system, the dilatation switching method for utilizing it |
| CN113315559B (en) * | 2021-05-25 | 2022-11-15 | 天津大学 | Transmission method of wireless sensor network |
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| CN1321046A (en) * | 2000-06-30 | 2001-11-07 | 深圳市中兴通讯股份有限公司 | Transmission convergence method of base station controller |
| CN1801972A (en) * | 2003-06-10 | 2006-07-12 | 中兴通讯股份有限公司 | Base station controller and its communication method |
| CN1788503A (en) * | 2003-07-16 | 2006-06-14 | Ut斯达康(中国)有限公司 | Distributed type radio network controller based on IP exchanging |
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