CN1957630A - Method of allocating centralized BS resource and routing signal - Google Patents
Method of allocating centralized BS resource and routing signal Download PDFInfo
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- CN1957630A CN1957630A CNA2004800431435A CN200480043143A CN1957630A CN 1957630 A CN1957630 A CN 1957630A CN A2004800431435 A CNA2004800431435 A CN A2004800431435A CN 200480043143 A CN200480043143 A CN 200480043143A CN 1957630 A CN1957630 A CN 1957630A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/086—Load balancing or load distribution among access entities
- H04W28/0861—Load balancing or load distribution among access entities between base stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Abstract
The present invention provides a method of allocating the channel resource in the centralized BS, concluding: selecting the optimum channel processing unit respectively for each radio link newly added so that all the channel processing that relates to each radio link newly added is performed respectively in the corresponding optimum channel processing unit. The present invention also provides a method of dispatching the resource adaptively and balancing the load on the basis of complimenting the channel resource allocation, and a centralized base station that can realize the above channel resource allocating method .Accordingly, to each radio link newly added (concluding the link established newly and added due to the macro diversity), which can be allocated to a optimum channel processing unit and be processed, thereby realizing the maximum of using the channel processing resource.
Description
The resource allocation of centralized base station
With signal method for routing technical field
The present invention relates to the technical field of distributed base station in GSM, the more particularly to resource allocation and control method in the centralized base station systems zoomed out using radio frequency unit.Background technology
1. centralized base station is summarized
In mobile communication system, base station（BTS the transmitting of wireless signal) is completed, receives and handles, traditional BTS is main by baseband, radio frequency（RF) subsystem and antenna composition, a BTS can cover different honeycomb (cells by multiple antennas）, such as shown in Fig. 1 (a)；And each BTS then by certain interface respectively with base station controller（) or radio network controller BSC（RNC) it is connected, thus constitutes wireless access network（RAN), as shown in Fig. 1 (b).
Fig. 2 gives another distributed base station, i.e., the system architecture of the centralized base station zoomed out using radio frequency unit.Compared with traditional base station, the centralized base station that this use radio frequency unit is zoomed out has many advantages：Allow to substitute a macrocell based on traditional base station using multiple Microcells, so as to better adapt to different wireless environments, improve the wireless performances such as capacity and the covering of system；The structure of centralization allows soft handover to be completed with More Soft Handoff, so as to obtain extra processing gain；The structure of centralization also causes the base band signal process resource of costliness to turn into the resource pool that multiple cells are shared, so as to obtain the benefit of statistic multiplexing, and effectively lowers system cost.PCT Patent " WO9005432, Communications system ";The U.S. special ^ " US5657374, Cellular system with centralized base stations and distributed antenna units ", " US6324391, Cellular communication with centralized control
and signal processing";Chinese patent application " CN1471331, the base station system of mobile communication,；And " US20030171118, Cellular radio transmission apparatus and cellular radio transmission method " etc. disclose the relevant of this technology and realize details U.S. Patent application.
As shown in Fig. 2 the main center channel by installing concentratedly of the centralized base station systems zoomed out using radio frequency unit handles master unit（MU) 10 constituted with multiple long-distance radio frequency units (RRIJ) 20, it is connected between them by broadband transmission link or network, and user plane and signaling plane that BSC/RNC interface units are then responsible for completing BTS and BSC/RNC interfaces are handled.Center channel processing master unit is mainly made up of the functional unit such as channel processing resource pond and signal route assignment unit, wherein, channel processing resource pond is stacked by multiple channel banks and formed, the work such as base band signal process are completed, signal route assignment unit is then according to each cell business volume（Traffic difference) carrys out dynamically distributes channel processing resource, so as to realize the effectively shared of multiple cell process resource.Signal route assignment unit can also be realized in addition to being realized as shown in Figure 2 inside MU as single equipment outside MU.Long-distance radio frequency unit is mainly made up of functional units such as the radio-frequency power amplifier of transmission channel, the low-noise amplifier of receiving channel and antennas.Center channel handles master unit 10 and the link of long-distance radio frequency unit typically can be using transmission mediums such as optical fiber, copper cable, microwaves；Signal transmission form can be it is sampled after data signal, or modulated analog signal；Signal can use baseband signal, intermediate-freuqncy signal or radiofrequency signal.
It is not difficult to find out from the above-mentioned introduction to prior art, a main advantage of centralized base station is to make base band signal process resource turn into the resource pool that multiple cells are shared, so as to obtain the benefit of statistic multiplexing and effectively lower system cost.Therefore, the distribution for how effectively carrying out channel processing resource is the key point of centralized base station.
2. channel processing resource and centralized base station structure
In CDMA（CDMA) in system, base band signal process resource it is main by with
RAKE receiver or other enhanced reception technique such as Multiuser Detections（MUD it is) that the chip-level processing unit of core and the symbol level processing unit two parts for being processed as core with channel coding/decoding are constituted, wherein, symbol level processing is close with customer service type and Rate Relationship, and chip-level processing is influenceed very little by user's type of service and Rate Relationship, it is mainly relevant with Traffic Channel number.
In the fairly large base station system for supporting many sector multi-carrier frequencies, Channel Processing funtion part typically has two kinds of possible structures, one is that chip-level processing unit and symbol level processing unit are integrated on single board to realize, the channel processing module that system can configure by multiple quantity is constituted；Two be chip-level processing unit is realized that the chip-level processing module and symbol level processing module that is, system can configure by multiple quantity are constituted on different boards respectively from symbol level processing unit.The typical case that Fig. 3 and Fig. 4 give above two structure realizes example.
In the representative instance by chip-level processing unit with the integrated system architecture of symbol level processing unit shown in Fig. 3, system is made up of M independent channel processing modules, so-called " independence ", refers to that each of which completes corresponding channel processing task and interconnected without internal signal.Due to the interconnection of no internal signal, so that the design of System Backplane bus cylinder significantly, so as to be conducive to constituting fairly large centralized base station, although intermodule is unfavorable for effective utilization of system resource independently of one another, also occurred in that based on digital signal processor in existing base band signal process solution（DSP) or parallel processing multiple microprocessing unit array structures full software implement scheme, due to software processor resource scheduling on flexibility, substantially reduce the structure system resource effectively utilize aspect deficiency.
In the representative instance for the system architecture that the chip-level processing unit shown in Fig. 4 is separated with symbol level processing unit, system by individual chip-level processing module and β symbol level manage Mo Kuai Group into.Wherein, independently of one another, i.e., each of which completes corresponding chip-level processing task without internal signal interconnection to chip-level processing module, and because chip-level processing speed is very high, chip-level processing module will carry out internal signal interconnection each other to answer system architecture
Hydridization, it is more difficult to applied in fairly large centralized base station；On the other hand, because speed is relatively low, symbol level processing module allows to carry out internal signal interconnection to realize that process resource is shared, therefore symbol level process part can be regarded as to continuous single processing module.
It can be seen that, above two typically realizes that structure has the discontinuous problem of channel processing resource, simultaneously in fairly large centralized base station, because the disposal ability of each channel bank is limited, when the RRU that centralized base station can be supported is larger, all RRU wireless signal can be exchanged into each channel bank simultaneously and just do not have practical significance.Simultaneously, because wireless signal streaming rate is very high, limited by signal route assignment unit and system complexity, it is also difficult to realize that all RRU wireless signal can be exchanged into each channel bank simultaneously, therefore, the RRU signal numbers that each channel bank can be handled simultaneously are always limited, that is to say, that not all wireless signal corresponding with centralized base station RRU can exchange to some channel bank simultaneously.The content of the invention
Therefore, it is just blunt according to the above-mentioned analysis to Fig. 3 and channel processing system structure representative instance shown in Fig. 4, the assignment problem of channel processing resource in the centralized base station of prior art can be further attributed to such a problem：
To the Radio Link of each new addition（Including newly-established and due to the increased Radio Link of macro-diversity）, it should assign it to which channel bank is handled, and by cell RRU wireless signal is routed to the channel bank of the distribution where the Radio Link accordinglyWherein, above-mentioned channel bank is each channel processing module of correspondence to channel processing system structure shown in Fig. 3, is correspondence chip-level to channel processing system structure shown in Fig. 4
Processing module（Because symbol level process part is continuous single treatment module, in the absence of above-mentioned assignment problem, the scheduling of its internal resource does not consider in the present invention）.The present invention exactly proposes a kind of effective solution regarding to the issue above.
Therefore, it is an object of the present invention to provide a kind of method for being used to carry out channel resource allocation in the centralized base station of wireless communication system, the method comprising the steps of：
Respectively each Radio Link selection preferred channels processing unit newly added, to cause the Channel Processing relevant with each Radio Link newly added to be carried out respectively in selected corresponding preferred channels processing unit.
In one embodiment of above-mentioned channel resource allocation method, in addition to step：According to the parameter related to the Radio Link of each new addition in access procedure, quantify the resource occupation amount of each Radio Link newly added using system known resource model information, and preferred channels processing unit is selected for the Radio Link of each new addition based on the resource occupation amount for each Radio Link newly added for quantifying to obtain.
According to a kind of preferred embodiment of above-mentioned channel resource allocation method, in the step of Radio Link each newly to add selects preferred channels processing unit so that cell corresponding with the Radio Link that each selected preferred channels processing unit is responsible for processing is geographically as adjacent as possible and concentrates on some region.
It can be seen that, according to Radio Link of the above method to each new addition（Including newly-established and due to the increased Radio Link of macro-diversity）The optimal channel bank of selection, it is possible to achieve each channel processing resource is distributed in the optimization of the point in base station.On this basis, maximized in order that obtaining channel processing resource utilization rate, scheduling of resource can also be carried out, to balance the processing load of each channel bank between each channel bank according to the medium-term and long-term statistical result of the centralized base station channel bank load.
Therefore, it is used to carry out adaptive resource scheduling and balancing the load method in the centralized base station of wireless communication system it is a further object to provide a kind of, this method includes Bu Sudden：
According to the statistics to the load condition of each channel bank in the centralized base station
As a result, the parameter relevant with the load sharing of each channel bank is adaptively adjusted in System resource model information, to realize that the adaptive resource of each channel bank is dispatched and balancing the load；
Wherein,
It is based upon resource occupation amount determined by the Radio Link of each new addition, respectively described each Radio Link selection preferred channels processing unit newly added, to cause the Channel Processing relevant with each Radio Link newly added to be carried out respectively in selected corresponding preferred channels processing unit.
In the above-mentioned adaptive resource scheduling of the present invention and a kind of embodiment of balancing the load method, cell corresponding with the Radio Link that the preferred channels processing unit of the Radio Link selection each newly to add is responsible for processing is geographically as adjacent as possible and concentrates on some region.
It is just blunt according to the scheduling of above-mentioned adaptive resource and a kind of preferred embodiment of balancing the load method, for each channel bank in centralized base station, the cell that the centralized base station is controlled is divided into the other set of cells of corresponding one group of different resource distribution stage；And, select preferred channels processing unit from high to low for each Radio Link newly added according to the resource allocation level of the set of cells divided.
According to another object of the present invention there is provided a kind of centralization collection station of channel resource allocation method for being used to realize the invention described above, the centralized base station includes：
Center channel processing master unit Μ;
Multiple long-distance radio frequency unit RRU, it is connected by broadband transmission link or network handles master unit MU couplings with center channel；
Wherein, the centralized base station also includes
Preferred channels alternative pack, for being respectively that each Radio Link newly added selects preferred channels processing unit, to cause the Channel Processing relevant with each Radio Link newly added to be carried out respectively in selected corresponding preferred channels processing unit.
Just it is blunt according to the present invention above-mentioned centralized base station a kind of embodiment, the optimal letter
Road alternative pack is configured to select preferred channels processing unit according to the resource occupation amount of each Radio Link newly added quantified using system known resource model information for the Radio Link of each new addition.In a preferred embodiment, the corresponding cell of the preferred channels alternative pack is configured so that with each selected preferred channels processing unit is responsible for processing Radio Link is geographically as adjacent as possible and concentrates on some region.
Although it should be noted that for the ease of description, the present invention is described by taking cdma system as an example, basic thought, spirit, principle and the method for the present invention, to the GSM of other standards, such as FDMA (frequency division multiple access）, TDMA (time division multiple acesses）, OFDM (orthogonal frequency-divisions）Etc. being still applicable.
As described above, according to the present invention, channel processing resource is decomposed into two relatively independent processing procedures in centralized base station, and one is (including newly-established and due to the increased Radio Link of macro-diversity to the Radio Link of each new addition）The optimal channel bank of selection；Another is the medium-term and long-term statistical result according to the centralized base station channel bank load, scheduling of resource is carried out between each channel bank, to balance the processing load of each channel bank, so as to reach the maximized purpose of channel processing resource utilization rate.Blunt obvious, previous processing procedure is that the optimization to the distribution of channel processing resource in centralized base station can be achieved, and latter processing is then the further improvement to previous process.Brief description of the drawings
With reference to detailed description of each accompanying drawing to the specific embodiment of the invention, the features of the present invention, benefit will become more apparent upon.In the drawings：
Fig. 1 (a) shows traditional BTS structures；
Fig. 1 (b) shows traditional wireless accessing network structure；
Fig. 2 shows the centralized base station systems structure zoomed out using radio frequency unit；Fig. 3 shows in the base station system of prior art chip-level in Channel Processing funtion part
Processing and the integrated system architecture of symbol level processing unit；
Fig. 4 shows the system architecture that chip-level processing is separated with symbol level processing unit in Channel Processing funtion part in the base station system of prior art；
Fig. 5 shows the schematic diagram of three kinds of set of cells of each channel bank of centralized base station according to an embodiment of the invention；
Fig. 6 a show the schematic flow diagram for the Radio Link preferred channels processing unit selection course realized in centralized base station according to an embodiment of the invention；
Fig. 6 b show the detail flowchart of the preferred channels processing unit selection course in Fig. 6 a；
Fig. 7 a show the first situation according to the channel processing resource adaptive scheduling of the present invention and an embodiment of balancing the load method；
Fig. 7 b show second of situation of an embodiment of the method according to channel processing resource adaptive scheduling and balancing the load of the invention.Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with each accompanying drawing.
1. the resource allocation in access procedure
According to the present invention, newly added when there is Radio Link（Including newly-established and due to the increased Radio Link of macro-diversity）When, it is necessary to select to carry out the preferred channels processing unit of respective channel processing, for this reason, it may be necessary to carry out the Radio Link of the new addition analysis and assessment of resource occupation, according to analysis above, involved centralized base station systems resource mainly has：
Chip-level processing unit resources；
Symbol level processing unit resources（Only to channel processing system structure shown in Fig. 3）；
The each channel banks of at most allow allowing simultaneously for processing simultaneously
Exchange or be routed to the RRU wireless signal path resources of each channel bank；And as previously described, different rates and the Radio Link of type of service its to take chip-level process resource and symbol level process resource be different, simultaneously newly-established Radio Link and due to the increased Radio Link of macro-diversity in terms of occupying system resources it is also different, therefore need according to speed, type of service, whether be the radio link parameters such as the increased Radio Link of macro-diversity, quantify the resource occupation amount of each Radio Link newly added, to carry out the analysis and assessment of resource occupation.In view of base station is to determine known to System resource model information such as average resource occupancy, the channel processing resource structures of various speed and type service, therefore the processing of this selection preferred channels processing unit that carries out respective channel processing is effectively equivalent to a table lookup operation.
According to the present invention, each Radio Link newly added in access procedure（Including newly-established and due to the increased Radio Link of macro-diversity）Preferred channels processing unit selection should follow following principle：That is, the selection of preferred channels processing unit should take the RRU signalling channel resources of each channel bank as few as possible；The RRU wireless signals of cell where each macro-diversity branch road exchange to same channel bank to realize that More Soft Handoff is handled when soft handover is occurred as far as possible；Reduce as far as possible due to the handover operation across channel bank that mobile terminal is caused in mobile process such as different districts switchings.
In fact, when the GSM used supports soft hand-off, handle all macro-diversity branch roads of a mobile terminal simultaneously in same channel bank, advantageously reduce the consumption of system processing resources, be conducive to improving the wireless performances such as covering and capacity.Even if the GSM used does not support soft hand-off, such as TDD (time division duplexs）The cdma system of pattern, if the Channel Processing of mobile terminal movement its Radio Link when different districts switch still is carried out in same channel bank, it is possible to reduce the context related to the mobile terminal between different channels processing unit（Context) the migration operation of information, reduces and carries out having related parameter to match somebody with somebody in new channel bank
The operation put and operated, so as to simplify system complexity, is conducive to the raising of the stability of a system and reliability.
According to mentioned above principle, in the preferred embodiment of the present invention, each Radio Link newly added in access procedure（Including newly-established and due to the increased Radio Link of macro-diversity）Preferred channels processing unit select the corresponding cell of Radio Link for causing each channel bank to be responsible for processing geographically as adjacent as possible and concentrate on some region, so, it is beneficial to take the RIOJ signalling channel resources of each channel bank as few as possible；Be conducive to enabling as far as possible soft handover when occurring the RRU wireless signals of cell where each macro-diversity branch road exchange to same channel bank and improve wireless performance to realize More Soft Handoff processing；Be conducive to reducing as far as possible due to the handover operation across channel bank that mobile terminal is caused in mobile process such as different districts switchings.
Specifically, according to each Radio Link newly added in this access procedure of the present invention（Including newly-built and due to the increased Radio Link of macro-diversity）Preferred channels processing unit selection preferred embodiment it is as described below.
First, for each channel bank in centralized base station, the cell that the centralized base station is controlled is divided into the other set of cells of corresponding one group of different resource distribution stage, in the nonrestrictive preferred embodiment mode, cell can be divided into three set of cells of basic cell, candidate cell and remaining cell, the Traffic Channel of cell in its basic cell set of each channel bank priority treatment, next to that in candidate cell collection cell Traffic Channel, be finally the Traffic Channel of cell in remaining cell set.According to the present invention, cell classification should follow following principle：
Each cell one belonging to the centralized base stations is scheduled on one and only in the basic set of cells of a channel bank, the channel bank is referred to as the home channel processing unit of the cell, therefore, it is empty and union is whole cells belonging to the centralized base station that the basic set of cells of all channel banks, which occurs simultaneously,；
.Basic cell is geographically adjacent set of cells, therefore is conducive to as far as possible
The RRIJ signalling channel resources of each channel bank are taken less, being conducive to enabling as far as possible soft handover, the RRU wireless signals of cell exchange to same channel bank where each macro-diversity branch road when occurring, so as to realize More Soft Handoff in a channel bank；
Cell in the candidate set of each channel banks of is cell in the basic set of cells with the channel bank geographically adjacent peripheral cell, therefore it is the basic set of cells part that geographically coverage expands, due to overlapping covering, a cell may be in the candidate set of multiple channel banks simultaneously.As described later, candidate cell when cell in candidate set is load sharing, i.e. when certain channel bank has channel processing resource more than needed and larger other channel bank Channel Processing loads, the channel bank preferentially can provide channel processing resource for the cell in its candidate set.If comprising some of the basic set of cells of other channel banks cell in the candidate set of certain channel bank, the channel bank is referred to as the adjacent channel processing unit of these channel banks；
Residue set of cells is that the affiliated subdistrict of other centralized base stations in addition to basic cell and candidate cell is gathered.Because the cell in remaining set of cells is geographically apart from each other with cell handled by its channel bank, therefore excessive RRU signalling channel resources may be consumed, and More Soft Handoff processing relatively difficult to achieve, therefore as described later, selection during load sharing only can be just used as in extreme situations.Fig. 5 gives the schematic diagram of above-mentioned three kinds of set of cells, in this embodiment, centralized base station has 9 channel banks, the each corresponding basic set of cells of the channel bank such as D1, the D2 that are marked in figure ... D9 regions, the E1 marked in figure is expanded to after plus its corresponding candidate set, E2 ... E9 regions, wherein each region contains a number of geographically adjacent cell.It can be seen that, the basic set of cells of all channel banks just covers whole cells of the centralized base station, appoints
One cell has and only one of which home channel processing unit, still, and a cell may be simultaneously in the candidate set of multiple channel banks.
Fig. 6 a and 6b are according to the preferred embodiment of the invention, the flow chart for the Radio Link preferred channels processing unit selection course realized in centralized base station.Wherein, Fig. 6 a show the exemplary flow of the preferred channels selection course.As illustrated, in step S50, for each channel bank in centralized base station, the cell for being controlled the centralized base station in the way of shown in Fig. 5, which is divided into corresponding one group, has the other set of cells of different resource distribution stage；In step S60, preferred channels processing unit is selected from high to low for each Radio Link newly added according to the resource allocation level of the set of cells divided；In step S70, the result of preferred channels selection processing is returned, i.e., whether successfully have selected preferred channels processing unit for each Radio Link newly added.
Fig. 6 b show the detailed process of step S60 and S70 in Fig. 6 a.As illustrated, after base station receives the newly-built Radio Link from BSC/RNC or increased message（Step S100), carry out corresponding message processing and obtain the parameters such as the wireless link rate, type of service, the factor of newly-built Radio Link and increase Radio Link is considered simultaneously, quantifies the resource occupation amount of the Radio Link using system known resource model information（Bu Sudden S110), while cell and corresponding RRU signals where searching the Radio Link（Step S120)；Then whether the home channel processing unit of cell can be the resource needed for the Radio Link is carried enough where judging it（Including chip-level processing unit resource, symbol level processing unit resource, RRU wireless signal path resources etc.）（Step S130)；If step S130 judged result, which is " no ", i.e. its home channel processing unit, can not provide required resource, then the channel bank that all candidate cell sets include cell where the Radio Link is searched（Step S140), then judge that can corresponding channel bank be the resource (step S150) needed for the Radio Link is provided successively by the order of available resources size from high to low;If step S150 judged result, which is " no ", i.e. all these channel banks, can not still provide required resource, then judge whether other channel banks can carry for the Radio Link successively by the order of available resources size from high to low
For required resource（Step S160), if can not still find the channel bank of the demand of satisfaction, return to wireless link to BSC/RNC or increase failed message and point out that failure cause is inadequate for process resource（Step S210).Then stop follow-up judgement as long as being found in above-mentioned each resource judgment and meeting the channel bank of resource requirement, whether the RRU wireless signals of cell have been routed to the channel bank where then judging the Radio Link（Step S170), the RRU wireless signals are routed to the channel bank if not yet routeing（Step S180), then it is the wireless link distribution and configures corresponding channel processing resource, the statistical information (step S190) of respective channel processing unit resource situation is updated, and returns to wireless link to BSC/RNC or increases successful message (step S200).
In above-mentioned Radio Link preferred channels processing unit selection course, the home channel processing unit of its place cell of prioritizing selection, so as to be conducive to taking the RRU signalling channel resources of each channel bank as few as possible, and the RRU wireless signals of cell where each macro-diversity branch road exchange to same channel bank to realize that More Soft Handoff is handled when soft handover is occurred as far as possible；During angelica channel bank inadequate resource, based on same purpose, it is considered as the channel bank that candidate cell set includes cell where the Radio Link, this thing happens be primarily due near zone active users and portfolio where the basic cell of its home channel processing unit it is larger caused by, therefore need to share excessive load by adjacent channel bank for it, when process resource required for there is channel bank of multiple candidate cell sets comprising cell where the Radio Link and can provide, the minimum channel bank of load is then selected to realize channel bank balancing the load；Only when some high extreme case of area business amount in a big way in short-term occurs in system, just load sharing processing can be provided by non-conterminous channel bank.
Although in order to realize each Radio Link newly added in access procedure（Including newly-established and due to the increased Radio Link of macro-diversity）Preferred channels processing unit selection, the embodiment used be so that each channel bank be responsible for processing it is wireless
The corresponding cell of link is geographically as adjacent as possible and concentrates on some region.But; it should be understood by those skilled in the art that; the limitation for the technical scheme that the preferred channels processing unit that this preferred embodiment is not intended to the Radio Link to newly adding in the centralization collection of this realization to present invention station is selected, the embodiment that other skilled in the art need not spend creative work to be contemplated that is also regarded as being within the scope of the present invention.For example, can also have other selections for the mode classification of the set of cells of each channel bank, as long as corresponding mode classification helps to realize the optimized allocation of resources of above-mentioned centralized base station.
2. adaptive resource is dispatched and balancing the load
According to the present invention, on the basis of the selection of above-mentioned Radio Link preferred channels processing unit, can also be according to the medium-term and long-term statistical result of channel bank load in centralized base station, scheduling of resource is carried out between each channel bank, to balance the processing load of each channel bank, so as to reach the maximized purpose of channel processing resource utilization rate.
Therefore, present invention also offers a kind of method for realizing above-mentioned each channel bank balancing the load.The method according to this invention, according to the medium-term and long-term statistical result of centralized base station channel bank load, adaptively adjust the set of cells based on load sharing purpose of each channel bank, such as candidate set in the above-mentioned preferred real mode with reference to shown in Fig. 5, so as to reach the purpose of each channel bank balancing the load.
In the first situation of a preferred embodiment of the method according to this invention, the instantaneous load situation to each channel bank in centralized base station carries out each channel bank in the range of statistics acquisition certain time（It is average）Load, and the total average load amount of all channel banks is obtained by arithmetic average, if the load of certain channel bank is beyond the overall average certain thresholding, then suitably increase the candidate set of the adjacent channel processing unit of the channel bank, wherein increased cell is the cell in the candidate set with corresponding adjacent channel processing unit in the basic set of cells of the channel bank geographically adjacent cell, each adjacent channel processing unit candidate
The increased larger adjacent channel processing unit candidate set of respective load, i.e. load that how much also depends on of set of cells increases less, and the less adjacent channel processing unit candidate set increase of load is more；Simultaneously, suitably reduce the candidate set of the channel bank, reduce number also depend on the load of each adjacent channel processing unit, the load of even its certain adjacent channel processing unit is larger, the cell for belonging to the basic set of cells of adjacent channel processing unit then reduced in its candidate set is smaller, if the load of its certain adjacent channel processing unit is smaller, the cell for belonging to the basic set of cells of adjacent channel processing unit reduced in its candidate set is more.
Fig. 7 (a) is the schematic diagram of the first situation.As shown in Fig. 7 (a), certain centralized base station includes three channel bank A, B, C, basic cell A is corresponded to respectively, B, C, if channel bank B load exceeds the certain thresholding of overall average, based on a kind of preferred scheme of the above-mentioned mat woven of fine bamboo strips, then its adjacent channel processing unit, C candidate set will increase, and channel bank B candidate set is small Jiang Minus, if channel bank A load is more than channel bank C load, then the incrementss of channel bank A candidate sets are smaller than the incrementss of channel bank C candidate sets, and the cell for belonging to the basic set of cells of channel bank A reduced in channel bank B candidate set is more compared with the cell for belonging to the basic set of cells of channel bank C.
In just second of situation of blunt the preferred embodiment according to this method of the present invention, the instantaneous load situation to each channel bank in centralized base station carries out each channel bank in the range of statistics acquisition certain time（It is average）Load and the total average load amount of all channel banks（Processing with the first above-mentioned situation is identical）If the load of certain channel bank is less than overall average certain thresholding, then suitably increase the candidate set of the channel bank, the increased load for how much depending on each adjacent channel processing unit, the load of even its certain adjacent channel processing unit is larger, then the increased cell for belonging to the basic set of cells of adjacent channel processing unit is less in its candidate set, if the load of its certain adjacent channel processing unit is smaller, its candidate cell collection
The increased cell for belonging to the basic set of cells of adjacent channel processing unit is more in conjunction；Simultaneously, suitably reduce the candidate set of the adjacent channel processing unit of the channel bank, reduce number also depend on the load of each adjacent channel processing unit, that is the larger adjacent channel processing unit candidate set reduction of load is more, and the less adjacent channel processing unit candidate set of load reduces less.
Fig. 7 (b) be this and the schematic diagram of two kinds of situations.Certain centralized base station includes three channel banks A, B, C, basic cell A, B, C are corresponded to respectively, if channel bank B load is less than the certain thresholding of overall average, based on above-mentioned second of preferred scheme, then its adjacent channel processing unit, C candidate set will reduce, and channel bank B candidate set will increase, if channel bank A load is less than channel bank（：Load, then the reduction amount of channel bank A candidate sets is smaller than the reduction amount of channel bank C candidate sets, and the cell for belonging to the basic set of cells of channel bank A increased in channel bank B candidate set is more compared with the cell for belonging to the basic set of cells of channel bank C.
It will be appreciated by those skilled in the art that, in the above-mentioned adaptive resource scheduling of the present invention and balancing the load method, parameter for judging the channel bank load of machinery systems can also choose other and suitably judge parameter in addition to the total average load amount of all channel banks.For example, the total weighted average load of all channel banks, or the total average load amount of all channel banks function, such as aP+b, wherein a, b are constant, and P is the total average load amount of all channel banks；Etc..As for used threshold value when judging to need to the load of certain channel bank mutually adjust, it can also be configured by technical staff according to actual conditions.
The above two method of the present invention with software while it is preferred that realized, it is clear, however, that these methods can also equally be realized with well known to a person skilled in the art various hardware modules or structure.Therefore, it is any to realize the hardware configuration of the above method of the present invention also while should be considered to fall in protection scope of the present invention with known hardware configuration or its combination.For example, corresponding preferred channels processing unit can be set to select in centralized base station
Part is selected, for selecting optimal channel bank to the Radio Link newly added, so as to complete the resources configuration optimization in the centralized base station.It is readily appreciated that, the preferred channels processing unit alternative pack can be realized by various known functional modules, and it can be arranged in the MU 10 for example shown in Fig. 3, can also be arranged on centralized base station outside, etc..
Although having described each technical scheme of the present invention in conjunction with specific embodiments above, skilled in the art realises that, on the premise of without departing substantially from the principle of the present invention and spirit, various improvement or deformation can also be made to the present invention.In a word, protection scope of the present invention is only determined by appended claims.
Claims (1)
- 1st, a kind of method for being used to carry out channel resource allocation in the centralized base station of wireless communication system, including Bu Sudden：Respectively each Radio Link selection preferred channels processing unit newly added, to cause the Channel Processing relevant with each Radio Link newly added to be carried out respectively in selected corresponding preferred channels processing unit.2nd, channel resource allocation method as claimed in claim 1, in addition to step：According to the parameter related to the Radio Link of each new addition in access procedure, quantify the resource occupation amount of each Radio Link newly added using system known resource model information, and preferred channels processing unit is selected for the Radio Link of each new addition based on the resource occupation amount for each Radio Link newly added for quantifying to obtain.3rd, channel resource allocation method as claimed in claim 1 or 2, wherein：It is described select preferred channels processing unit for each Radio Link newly added the step of in so that cell corresponding with the Radio Link that each selected preferred channels processing unit is responsible for processing is geographically as adjacent as possible and concentrates on some region.4th, the channel resource allocation method as any one of claim 1-3, wherein：It is described to include following sub-step the step of each Radio Link newly added selects preferred channels processing unit in access procedure：For each channel bank in centralized base station, the cell that the centralized base station is controlled, which is divided into corresponding one group, has the other set of cells of different resource distribution stage；Preferred channels processing unit is selected for each Radio Link newly added from high to low according to the resource allocation level of the set of cells divided, it is preferentially high in resource allocation level Selected in set of cells, when only can not find optimal channel bank in the high set of cells of resource allocation level, just select the optimal channel bank in the relatively low set of cells of resource allocation level successively.5th, channel resource allocation method as claimed in claim 4, wherein：The other set of cells of different resource distribution stage divided for each channel bank includes：Basic cell, candidate cell and remaining cell, wherein, basic cell is unique to each channel bank, and it is empty and union is whole cells belonging to the centralized base station that the basic set of cells of all channel banks, which occurs simultaneously, for each cell in each basic set of cells, the channel bank belonging to it is the home channel processing unit of the cell；Cell in the candidate set of each channel bank is cell in the basic set of cells of the channel bank geographically adjacent peripheral cell；Remaining set of cells is that other affiliated subdistricts of the centralized base station in addition to basic cell and candidate cell are gathered, and, assign resource allocation level according to from the basic cell that high to low order is each channel bank, candidate cell and remaining cell.6th, the channel resource allocation method as described in claim 4 or 5, wherein：The described resource allocation level according to the set of cells divided includes following sub-step for each Radio Link selection preferred channels processing unit Bu Sudden newly added from high to low：After base station receives the message of new addition Radio Link, the cell and corresponding long-distance radio frequency unit RRU wireless signals where the Radio Link are determined according to the resource occupation amount of the Radio Link for the new addition for quantifying to obtain；Whether the home channel processing unit for judging the cell can be the resource needed for the Radio Link is carried enough, if its home channel processing unit can not provide required resource, the channel bank that all candidate cell sets include cell where the Radio Link is then searched, then corresponding Channel Processing list is judged successively by the order of available resources size from high to low Can member be the resource needed for the Radio Link is provided, if all these channel banks can not still provide required resource, then judge whether other channel banks can be the resource needed for the Radio Link is provided successively by the order of available resources size from high to low, to obtain preferred channels processing unit for the Radio Link of the new addition.7th, channel resource allocation method as claimed in claim 6, wherein：Then stop follow-up judgement as long as being found in judging at each time of the resource allocation step and meeting the preferred channels processing unit of resource requirement, if the preferred channels processing unit of the demand of satisfaction can not be found in the resource allocation step, return to wireless link to the corresponding base station controller of the centralized base station/radio network controller BSC/RNC or increase failed message and point out that failure cause is inadequate for process resource；AndAfter the resource allocation Bu Sudden are obtained and are met the preferred channels processing unit of resource requirement, whether the long-distance radio frequency unit R U wireless signals of cell have been routed to the preferred channels processing unit where judging the Radio Link, the RRU wireless signals are routed to the channel bank if not yet routeing, then it is the wireless link distribution and configures the channel processing resource that * is answered, the statistical information of respective channel processing unit resource situation is updated simultaneously, and is returned to wireless link to BSC/RNC or increased successful message.8th, the channel resource allocation method as any one of claim 1-7, wherein：The resource that the preferred channels processing unit can provide for corresponding new addition Radio Link includes chip-level processing unit resource, symbol level processing unit resource, RRU wireless signal path resources.9th, the channel resource allocation method as any one of claim 2-7, wherein, the parameter used in the step of resource occupation amount of each new addition Radio Link of the quantization includes speed, type of service and the radio link parameter of the Radio Link each newly added. 10th, channel resource allocation method as claimed in claim 9, wherein, the Radio Link that the radio link parameter includes representing the new addition is the increased Radio Link of macro-diversity or the type parameter of newly-built Radio Link.11st, the channel resource allocation method as any one of claim 5-7, wherein：When being the Radio Link selection preferred channels processing unit newly added in the resource allocation step, when process resource required for there is channel bank of multiple candidate cell sets comprising cell where the Radio Link and can provide, then choosing falls the minimum channel bank of load as the preferred channels processing unit, so as to realize each channel bank balancing the load.12nd, a kind of to be used in the centralized base station of wireless communication system carry out adaptive resource scheduling and balancing the load method, the method comprising the steps of：According to the statistical result to the load condition of each channel bank in the centralized base station, the parameter relevant with the load sharing of each channel bank is adaptively adjusted in System resource model information, to realize that the adaptive resource of each channel bank is dispatched and balancing the load；Wherein：It is based upon resource occupation amount determined by the Radio Link of each new addition, respectively described each Radio Link selection preferred channels processing unit newly added, to cause the Channel Processing relevant with each Radio Link newly added to be carried out respectively in selected corresponding preferred channels processing unit.Adaptive resource scheduling as claimed in claim 12 and balancing the load method, Cell corresponding with the Radio Link that the preferred channels processing unit of the Radio Link selection each newly to add is responsible for processing is geographically as adjacent as possible and concentrates on some region.14th, the adaptive resource scheduling as described in claim 12 or 13 and balancing the load method, wherein：For each channel bank in centralized base station, the cell that the centralized base station is controlled is divided into the other set of cells of corresponding Yi Group different resource distribution stages；Preferred channels processing unit is selected according to the resource allocation level of the set of cells divided from high to low for each Radio Link newly added.15th, adaptive resource scheduling as claimed in claim 14 and balancing the load method, wherein：The other set of cells of different resource distribution stage divided by each channel bank includes：Basic cell, candidate cell and remaining cell, wherein,Basic cell is unique to each channel bank, and it is empty and union is whole cells belonging to the centralized base station that the basic set of cells of all channel banks, which occurs simultaneously, for each cell in each basic set of cells, channel bank belonging to it is the home channel processing unit of the cell, cell in the candidate set of each channel bank is cell in the basic set of cells of the channel bank geographically adjacent peripheral cell, remaining set of cells is that other affiliated subdistricts of the centralized base station in addition to basic cell and candidate cell are gathered, and, according to from high to low order be each channel bank the basic cell, candidate cell and remaining cell assign resource allocation level.16th, the adaptive resource scheduling as any one of claim 12-15 and balancing the load method, wherein： It is described to be adaptively adjusted in System resource model information the parameter Bu Sudden relevant with the load sharing of each channel bank including sub-step：The load of certain channel bank is compared with certain predetermined value；And the parameter relevant with load sharing of the channel bank is adaptively adjusted according to comparative result.17th, adaptive resource scheduling as claimed in claim 16 and balancing the load method, wherein：The predetermined value is obtained at least one of in the following manner：Instantaneous load situation to each channel bank in centralized base station carries out the average load amount that statistics obtains each channel bank in the range of certain time, and will be used as the predetermined value by the total average load amount of all channel banks that arithmetic average acquisition is carried out to resulting average load amount；The predetermined value will be used as by total weighted average load that all channel banks that processing is obtained are weighted to resulting average load amount；Using the function aP+b of the total average load amount of all channel banks as the predetermined value, wherein a, b is constant, and P is the total average load amount of all channel banks.18th, the adaptive resource scheduling as any one of claim 15-17 and balancing the load method, wherein：The parameter relevant with the load sharing of the channel bank is the size of the respective cell set of each channel bank.19th, the adaptive resource scheduling as any one of claim 16-18 and balancing the load method, wherein：If the load of channel bank is more than the predetermined value, suitably increase the candidate set of the adjacent channel processing unit of the channel bank, meanwhile, suitably Reduce the candidate set of the channel bank.20th, adaptive resource scheduling as claimed in claim 19 and balancing the load method, wherein：When the load of channel bank is more than the predetermined value, the increased cell of institute is the geographically adjacent cell of the cell in the candidate set with respective channel processing unit in the basic set of cells of the channel bank.21st, the adaptive resource scheduling as described in claim 19 or 20 and balancing the load method, wherein：How much when the load of channel bank is more than the predetermined value, the adjacent channel processing unit candidate set of the channel bank is increased depends on the respective load of adjacent channel processing unit, the larger adjacent channel processing unit candidate set increase of load is less, and the less adjacent channel processing unit candidate set increase of load is more.22nd, the adaptive resource scheduling as any one of claim 19-21 and balancing the load method, wherein：When the load of channel bank is more than the predetermined value, the amount of the appropriate reduction of the candidate set of the channel bank depends on the load of its each adjacent channel processing unit, if the load of its certain adjacent channel processing unit is larger, the cell for belonging to the basic set of cells of adjacent channel processing unit then reduced in its candidate set is smaller, if the load of its certain adjacent channel processing unit is smaller, the cell for belonging to the basic set of cells of adjacent channel processing unit reduced in its candidate set is more.23rd, the adaptive resource scheduling as any one of claim 16-18 and balancing the load method, wherein： When the load of the channel bank is less than the predetermined value, suitably increase the candidate set of the channel bank, meanwhile, suitably reduce the candidate set of the adjacent channel processing unit of the channel bank.24th, adaptive resource scheduling as claimed in claim 23 and balancing the load method, wherein：When the load of channel bank is less than the predetermined value, the incrementss of the candidate set of the channel bank depend on the load of its each adjacent channel processing unit, if the load of its certain adjacent channel processing unit is larger, then the increased cell for belonging to the basic set of cells of adjacent channel processing unit is less in its candidate set, if the load of its certain adjacent channel processing unit is smaller, the increased cell for belonging to the basic set of cells of adjacent channel processing unit is more in its candidate set.25th, the adaptive resource scheduling as described in claim 23 or 24 and balancing the load method, it is characterised in that：When the load of channel bank is less than the predetermined value reduction amount of the candidate set of the adjacent channel processing unit of the channel bank number also depend on the load of each adjacent channel processing unit, the candidate set reduction of the larger adjacent channel processing unit of load is more, and the candidate set reduction of the less adjacent channel processing unit of load is less.26th, a kind of centralization collection station, including：Center channel processing master unit MU (10)；Multiple long-distance radio frequency unit RRU (20), it is connected by broadband transmission link or network handles master unit Μ couplings with center channel；Wherein, the centralized base station also includesPreferred channels alternative pack, for being respectively each Radio Link selection newly added Preferred channels processing unit, to cause the Channel Processing relevant with each Radio Link newly added to be carried out respectively in selected corresponding preferred channels processing unit.27th, centralized base station as claimed in claim 26, wherein：The preferred channels alternative pack is configured to select preferred channels processing unit according to the resource occupation amount of each Radio Link newly added quantified using system known resource model information for the Radio Link of each new addition.28th, the centralized base station as described in claim 26 or 27, wherein：The corresponding cell of the preferred channels alternative pack is configured so that with each selected preferred channels processing unit is responsible for processing Radio Link is geographically as adjacent as possible and concentrates on some region.29th, the centralized base station as any one of claim 26-28, wherein：The preferred channels alternative pack includes：Set of cells divides subassembly, for each channel bank in centralized base station, the cell that the centralized base station is controlled, which is divided into corresponding one group, to have the other set of cells of different resource distribution stage；WithChannel assignment subassembly, preferred channels processing unit is selected for the resource allocation level according to the set of cells divided from high to low for each Radio Link newly added, preferentially selected in the high set of cells of resource allocation level, when the optimal channel bank is only can not find in the high set of cells of resource allocation level, the optimal channel bank is just selected in the relatively low set of cells of resource allocation level successively.30th, centralized base station as claimed in claim 29, wherein：The other set of cells of different resource distribution stage divided for each channel bank includes：Basic cell, candidate cell and remaining cell, wherein, basic cell is unique to each channel bank, and the basic set of cells of all channel banks occurs simultaneously To be empty, union is whole cells belonging to the centralized base station, for each cell in each basic set of cells, and the channel bank belonging to it is the home channel processing unit of the cell；Cell in the candidate set of each channel bank is cell in the basic set of cells of the channel bank geographically adjacent peripheral cell；Remaining set of cells is that other affiliated subdistricts of the centralized base station in addition to basic cell and candidate cell are gathered, and, assign resource allocation level according to from the basic cell that high to low order is each channel bank, candidate cell and remaining cell.31st, the centralized base station as described in claim 29 or 30, wherein：Described Channel assignment subassembly is configured for：Whether the home channel processing unit for judging the cell corresponding with the Radio Link newly added can be the resource needed for the Radio Link is carried enough, if its home channel processing unit can not provide required resource, then search the channel bank that all candidate cell sets include cell where the Radio Link, then judge that can corresponding channel bank be the resource needed for the Radio Link is provided successively by the order of available resources size from high to low, if all these channel banks can not still provide required resource, then judge whether other channel banks can be the resource needed for the Radio Link is provided successively by the order of available resources size from high to low, to obtain preferred channels processing unit for the Radio Link of the new addition.32nd, centralized base station as claimed in claim 31, wherein：Described Channel assignment subassembly is further configured to be used for：Then stop follow-up judgement as long as being found in judging at each time of the resource allocation and meeting the preferred channels processing unit of resource requirement, if the preferred channels processing unit of the demand of satisfaction can not be found in the resource allocation process, return to wireless link to the corresponding base station controller of the centralized base station/radio network controller BSC/RNC or increase failed message and point out that failure cause is inadequate for process resource；AndThe preferred channels processing unit for meeting resource requirement is obtained in the resource allocation process Afterwards, whether the long-distance radio frequency unit RRU wireless signals of cell have been routed to the preferred channels processing unit where judging the Radio Link, the RRU wireless signals are routed to the channel bank if not yet routeing, then it is the wireless link distribution and configures corresponding channel processing resource, the statistical information of respective channel processing unit resource situation is updated simultaneously, and is returned to wireless link to BSC/RNC or increased successful message.
Applications Claiming Priority (1)
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|---|---|---|---|
| PCT/CN2004/000623 WO2005122610A1 (en) | 2004-06-10 | 2004-06-10 | A method of allocating the centralized bs resource and routing signal |
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| CN100551154C CN100551154C (en) | 2009-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932142A (en) * | 2009-06-19 | 2010-12-29 | 中兴通讯股份有限公司 | User interface data uplink/downlink transmission methods of time division BTS (Base Transceiver Station) for IP access |
| CN104581825A (en) * | 2013-10-18 | 2015-04-29 | 中兴通讯股份有限公司 | Resource status acquisition method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009164912A (en) * | 2008-01-07 | 2009-07-23 | Nec Corp | Base station device and method of controlling the same |
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| US5293641A (en) * | 1991-10-03 | 1994-03-08 | Telefonaktiebolaget L M Ericsson | Signal strength controlled directed retry in a mobile radiotelephone system |
| US5627879A (en) * | 1992-09-17 | 1997-05-06 | Adc Telecommunications, Inc. | Cellular communications system with centralized base stations and distributed antenna units |
| TW253088B (en) * | 1992-10-02 | 1995-08-01 | Ericsson Telefon Ab L M | |
| JPH0759145A (en) * | 1993-08-13 | 1995-03-03 | Oki Electric Ind Co Ltd | Mobile communication system |
| US5758287A (en) * | 1994-05-20 | 1998-05-26 | Airtouch Communications, Inc. | Hub and remote cellular telephone system |
| JPH09261722A (en) * | 1996-03-22 | 1997-10-03 | Hitachi Ltd | Mobile radio communication system |
| US6473623B1 (en) * | 1996-04-18 | 2002-10-29 | At&T Wireless Services, Inc. | Method for self-calibration of a wireless communication system |
| JPH1023497A (en) * | 1996-06-13 | 1998-01-23 | At & T Corp | Cellular radio telephone system utilizing centralized base station |
| SE522834C2 (en) * | 1998-11-11 | 2004-03-09 | Ericsson Telefon Ab L M | Device, system and method related to radio communication |
| SE515898C2 (en) * | 1999-05-21 | 2001-10-22 | Ericsson Telefon Ab L M | A method for cell load distribution in a cellular mobile radio communication system |
| AU2001239934A1 (en) * | 2000-04-27 | 2001-11-12 | Lgc Wireless, Inc. | Adaptive capacity management in a centralized basestation architecture |
| US6353600B1 (en) * | 2000-04-29 | 2002-03-05 | Lgc Wireless, Inc. | Dynamic sectorization in a CDMA cellular system employing centralized base-station architecture |
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- 2004-06-10 WO PCT/CN2004/000623 patent/WO2005122610A1/en active Application Filing
- 2004-06-10 JP JP2007526163A patent/JP4510888B2/en not_active Expired - Fee Related
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932142A (en) * | 2009-06-19 | 2010-12-29 | 中兴通讯股份有限公司 | User interface data uplink/downlink transmission methods of time division BTS (Base Transceiver Station) for IP access |
| CN101932142B (en) * | 2009-06-19 | 2015-04-01 | 中兴通讯股份有限公司 | User interface data uplink/downlink transmission methods of time division BTS (Base Transceiver Station) for IP access |
| CN104581825A (en) * | 2013-10-18 | 2015-04-29 | 中兴通讯股份有限公司 | Resource status acquisition method, device and system |
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| JP4510888B2 (en) | 2010-07-28 |
| WO2005122610A1 (en) | 2005-12-22 |
| JP2008502235A (en) | 2008-01-24 |
| CN100551154C (en) | 2009-10-14 |
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