CN102547768A - Method and device for realizing SON in distributed type Femto base station system - Google Patents
Method and device for realizing SON in distributed type Femto base station system Download PDFInfo
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Abstract
The invention provides a method and a device for realizing SON in a distributed type Femto base station system as well as an Femto base station system. The method comprises the following steps that: after an Femto base station is powered on, a radio frequency is set into an intercepting mode for intercepting the information of each adjacent cell in a network, wherein the adjacent cells comprise the adjacent cells of a macro base station and the adjacent cells of the Femto base station; and the adjacent cell list, the working frequency point, the interference code and the maximum transmission power of the Femto base station and the maximum transmission power of user equipment (UE) are obtained according to the intercepted information of each adjacent cell so as to finish the automatic configuration of the adjacent cell list, the working frequency point, the interference code and the maximum transmission power of the Femto base station and the maximum transmission power of the UE. According to the method and the device which are provided by the invention, the parameters of the cells can be configured in a self-adapting way by the Femto base station according to a network environment when the Femto base station is powered on, and the aim of automatic normal working is realized; furthermore, no manual interference is needed in the working process; and moreover, the interference can be decreased.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to implement device and a kind of Femto base station system of SON in the implementation method of SON in a kind of distributed Femto base station system, a kind of distributed Femto base station system.
Background technology
The main commercial technology of mobile communication just changes to 3G from 2G, 2.5G at present; Type of service is improving constantly along with wireless access rate also; Change to rich data is professional from simple voice and short message service gradually, it is also increasingly high that mobile data services account for the ratio of total business volume.A large amount of high-speed datas and multimedia service all occur in indoor environment as business such as visual telephone, Streaming Media, recreation, these business all need bigger power system capacity and good network quality.
Compare with traditional second generation GSM 900 frequency ranges, 3-G (Generation Three mobile communication system) signal attenuation is faster, and is poorer to the through characteristic of building, and the indoor covering that how to improve 3-G (Generation Three mobile communication system) is a great problem of pendulum in face of each operator always; Owing to the cell breath of 3G network, when the traffic loads of macro base station sub-district increases the weight of, the coverage of macro base station sub-district will diminish thereupon in addition.Solve the problems referred to above through the mode of introducing the Femto base station in the market, introduce the Femto base station and will greatly shunt the telephone traffic of macro base station sub-district, thereby can better speech quality be provided for the user.
The Femto base station is towards the lower communication base station of the transmitting power of indoor scene, and personal user and enterprise customer's fast access into network are provided, and the communication service efficiently of multiple business such as comprising voice, data, video is provided for the domestic consumer.The Femto base station of indoor application; Because One's name is legion, the uncertainty of switching on and shutting down makes the intervention that receives user and operator that the deployment of Femto base station should be few as far as possible; Need the Femto base station to possess SON (Self-Organizing Networks; Self-organizing network) function reaches plug and play, and can periodically carry out the parameter optimization of Femto base station cell.
The station mode of opening of macro base station is through the network planning at present, and cell parameter is by the unified configuration of network, and in network operation process, these cell parameters generally can not change.Can have very big defective if existing cell configuration mode is applied in the distributed Femto base station system: the Femto base station range is little, quantity is many, can not be configured base station from home one by one through Operation and Maintenance; And existing collocation method also is unfavorable for the realization of plug and play, and therefore the collocation method of existing macro base station cell parameter is not suitable for the Femto base station.
Technology below in centralized Femto network, existing in addition: the Femto base station is detected through down link, disposes preliminary frequency, and scrambler and transmitting power send to network controller with the cell parameter that disposes then and register, and revises the scrambler allocation list.This method is the scrambler allocation list of the adjacent cell that issues according to network when the preliminary scrambler of configuration, and therefrom the scrambler of sub-district far away, this sub-district of chosen distance is as the scrambler of this sub-district.The configuration of scrambler needs network real-time to safeguard a scrambler allocation list in this method; This method is that the configuration of simple frequency, scrambler and transmitting power (in fact also needs good Neighboring Cell List of network configuration and UE maximum transmission power to be handed down to the Femto base station then in addition; Could guarantee Femto base station operate as normal like this); Therefore said method can only be applicable in the centralized Femto network; Because in distributed Femto base station system, network can be responsible for the parameter configuration of sub-district, can not preserve the information of adjacent cell in real time yet and be handed down to the Femto base station that newly powers on.
Because install the Femto base station and the uncertainty of switching on and shutting down, in distributed Femto base station system, for making Femto base station ability operate as normal, the SON function is indispensable.With respect to the centralized Femto network architecture, distributed Femto system is a kind of more network configuration of intelligence, therefore; In distributed Femto network; How to let the Femto base station can operate as normal, and reduce manual intervention in the course of the work as far as possible, become this area problem demanding prompt solution.
Summary of the invention
For addressing the above problem; The present invention provides implementation method, device and a kind of Femto base station system of the SON in a kind of distributed Femto base station system; Can adaptive allocating cell parameter, realize automatic operate as normal, and in the course of the work without any need for manual intervention.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
The implementation method of SON in a kind of distributed Femto base station system comprises the steps:
After the Femto base station powered on, radio frequency was set to listen mode, intercepted the information of each adjacent cell in the network, and said adjacent cell comprises contiguous macro base station sub-district and contiguous Femto base station cell;
Information according to each adjacent cell that listens to; Obtain the maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station, and accomplish the automatic configuration of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
The implement device of SON in a kind of distributed Femto base station system comprises:
Intercept module, be used for after the Femto base station powers on, radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network, and said adjacent cell comprises contiguous macro base station sub-district and contiguous Femto base station cell;
The self-configuring module; Be used for information according to each adjacent cell that listens to; Obtain Neighboring Cell List, working frequency points, scrambler, the maximum transmission power of Femto base station and the maximum transmission power of UE of this Femto base station, and accomplish the automatic configuration of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
The present invention also provides a kind of distributed Femto base station system in addition, comprises the Femto base station described in the implement device of SON at least one above-mentioned distributed Femto base station system.
Can find out by above scheme; Implementation method, device and a kind of Femto base station system of SON in a kind of distributed Femto base station system of the present invention; The Femto base station has automatic listening functions; When the Femto base station has just added network, the Femto base station through intercepting each adjacent cell in the network information and obtain and accomplish the automatic configuration of each item cell parameter according to the information of the adjacent cell that listens to, make the Femto base station system only need insert the Internet network and just can work automatically through the IP port; Do not need webmaster and extraneous intervention, realized the purpose of the plug and play of Femto base station; Use method of the present invention and device to need not the terminal to report measured value, need not Signalling exchange, can reduce of the interference of this Femto base station adaptively, improved network performance further other base station in the network.
Description of drawings
Fig. 1 introduces the common network diagram that covers of macro base station and Femto base station behind the Femto base station;
Fig. 2 is the automatic configuration flow sketch map of the implementation method of SON in a kind of distributed Femto base station system among the embodiment one;
Fig. 3 is this Femto base station and the tangent sketch map of intercepting PCCPCH RSCP largest cell in the sub-district;
Fig. 4 is the Automatic Optimal schematic flow sheet of the implementation method of SON in a kind of distributed Femto base station system among the embodiment two;
Fig. 5 is the whole implementation frame diagram of SON in the embodiment of the invention three;
Fig. 6 is the synchronous schematic flow sheet of SON cyclic cell in the embodiment of the invention three;
Fig. 7 is the structural representation of the implement device of SON in a kind of distributed Femto base station system among the embodiment four.
Embodiment
The invention provides implementation method, device and a kind of Femto base station system of SON in a kind of distributed Femto base station system, with the problem that solves in the prior art allocating cell parameter automatically and need manual intervention.Below in conjunction with accompanying drawing, the specific embodiment of implementation method, device and a kind of Femto base station system of SON in a kind of distributed Femto base station system of the present invention is done further to describe.
Embodiment one
The description of embodiments of the invention equally also is applicable to WCDMA and CDMA2000 system certainly mainly based on the TD-SCDMA GSM.As shown in Figure 1, in certain scope, comprise a plurality of macro base stations sub-district and a plurality of Femto base station cell to satisfy the wireless coverage of user mobile phone (UE).Macro base station sub-district maximum downstream transmitting power is fixed, and system provides the Femto base station with reference to maximum transmission power, but this maximum transmission power can be adjusted according to the network environment self adaptation.The mode that intercept the Femto base station is adopted in the configuration of cell parameters such as other cell parameter such as Neighboring Cell List, working frequency points, scrambler in the Femto system, and the mode through SON self-configuring and self-optimizing obtains.As shown in Figure 2, the implementation method of SON comprises the steps: in a kind of distributed Femto base station system
Step S1, after the Femto base station powered on, radio frequency was set to listen mode, intercepted the information of each adjacent cell in the network; Specifically comprise: radio frequency is set to the scope of each adjacent cell working frequency range in the network, and the sub-district in the whole frequency scope is intercepted.Said adjacent cell comprises contiguous macro base station sub-district and contiguous Femto base station cell.When the interference of considering between the base station, not only having considered the configuration of macro base station in the method for the present invention, also considered the configuring condition of contiguous Femto base station simultaneously, is a kind of method of reasonable configuration more.
The information of above-mentioned each adjacent cell that listens to comprises: the working frequency points of each adjacent cell, scrambler, PCCPCH RSCP (Primary Common Control Physical Channel Received Signal Code Power; The Primary Common Control Physical Channel received signal code power) information such as reception signal strength values on value, SNR (Signal/Noise, signal to noise ratio) value and each carrier wave.
Step S2 according to the information of each adjacent cell that listens to, obtains the Neighboring Cell List of this Femto base station, and accomplishes the automatic configuration of the Neighboring Cell List of this Femto base station.
Step S3 according to the information of each adjacent cell that listens to, obtains the working frequency points of this Femto base station, and accomplishes the automatic configuration of the working frequency points of this Femto base station.
Step S4 according to the information of each adjacent cell that listens to, obtains the scrambler of this Femto base station, and accomplishes the automatic configuration of the scrambler of this Femto base station.
Step S5 according to the information of each adjacent cell that listens to, obtains the maximum transmission power of this Femto base station and the maximum transmission power of UE, and accomplishes the automatic configuration of maximum transmission power of maximum transmission power and the UE of this Femto base station.
Preferably; The process that the information of each adjacent cell that basis listens among the said step S2 is obtained the Neighboring Cell List of this Femto base station specifically can comprise as follows: sort to the PCCPCH RSCP value of each adjacent cell in the network that listens in the Femto base station; Select the Neighboring Cell List of the formation Femto base station, sub-district of the bigger predetermined number of said PCCPCH RSCP value; That is: according to the size of said PCCPCH RSCP value, the sub-district of descending selection predetermined number forms the Neighboring Cell List of Femto base station.
The process that the information of each adjacent cell that preferably, basis listens among the said step S3 is obtained the working frequency points of this Femto base station specifically can comprise as follows:
Step S301, working frequency points, scrambler, PCCPCH RSCP value and the carrier wave of each adjacent cell receive signal strength values in the network that the Femto base station obtains to listen to;
Step S302, the Femto base station obtains the operable candidate's frequency tabulation of this Femto;
Step S303, the already used frequency in other sub-district that listens in the Femto base station acquisition network forms and intercepts the frequency tabulation;
Step S304; Whether exist in the tabulation of Femto base station judges candidate frequency and do not belong to the frequency of intercepting the frequency tabulation; If exist; Then calculate the absolute value sum of this frequency and the difference of all frequencies of having listened to respectively, select wherein and the available frequency of frequency minimum as this Femto base station;
Step S305; If said candidate's frequency tabulation is intercepted the frequency tabulation for the frequency in empty or said candidate's frequency tabulation all belongs to; Then obtain said carrier wave of intercepting each frequency in the frequency tabulation and receive signal strength values, choose carrier wave and receive the working frequency points of the minimum frequency of signal strength values as this Femto base station.
The Femto base station is the listening functions of utilization itself in the present embodiment; Through to the disturbed condition on each carrier wave of peripheral cell; Select to disturb the working frequency points of minimum carrier wave, do not need webmaster to carry out the frequency configuration, can effectively reduce manual intervention as this Femto base station.
The process that the information of each adjacent cell that preferably, basis listens among the said step S4 is obtained the scrambler of this Femto base station specifically can comprise as follows:
Step S401, the Femto base station obtains and the frequency point allocation information of this Femto base station with frequency, scrambler, PCCPCH RSCP value and this sub-district of all sub-districts frequently;
Step S402 adopts the alternative scrambling code distribution method, carries out basic scrambler set of dispense;
Step S403 carries out downlink frequency pilot code and distributes;
Step S404 distributes the scrambler of confirming this Femto base station according to said basic scrambler set of dispense and downlink frequency pilot code.
Because the distribution of above-mentioned basic scrambler set of dispense and downlink frequency pilot code is known technology, so the two is not done and gives unnecessary details to this in the present embodiment.In the present embodiment; The Femto base station does not need webmaster to carry out the scrambler configuration equally; But adopt a kind of scrambling code planning algorithm of alternative, and at first scrambler is divided into groups according to the correlation of compound key, obtain the scrambler of this Femto base station then according to the cross correlation of compound key interblock.Above-mentioned way can further reduce manual intervention.
Preferably, the process of maximum transmission power of obtaining maximum transmission power and the UE of this Femto base station according to the information of each adjacent cell of listening among the said step S5 specifically can comprise as follows:
Step S501, the working frequency points of working frequency points, scrambler, PCCPCH RSCP value and this sub-district of each adjacent cell in the network that the Femto base station obtains to listen to;
Step S502 searches the maximum sub-district of PCCPCH RSCP value in the adjacent cell that listens to;
Step S503 obtains the maximum corresponding PCCPCH channel transmitting power (PCCPCH TxPower) in sub-district of PCCPCH RSCP value;
Step S504 is provided with the minimum intensity of edge field intensity according to the requirement of cell edge field intensity in the actual overwrite procedure;
Step S505 adopts propagation model and link budget, between the base station of calculating the maximum sub-district of PCCPCH RSCP value and this Femto base station apart from d1, and base station self the covering radius d2 of the sub-district of calculating PCCPCH RSCP value maximum;
Step S506 in conjunction with propagation model and link budget, adopts the principle of wireless coverage, makes that the maximum sub-district of this Femto base station scope that covers and the PCCPCH RSCP value that listens to is tangent, as shown in Figure 6.Disturb for reducing, the coverage d3 that this sub-district is set is above-mentioned distance and poor (being d3=d1-d2) of radius, and obtains this Femto base station PCCPCH transmitting power;
Step S507 is provided with a power bias value on the basis of this Femto base station PCCPCH transmitting power, and then obtains the maximum transmission power of Femto base station;
Step S508, the maximum transmission power that said UE is set is identical with said PCCPCH transmitting power.
The scope that the transmitting power of Femto base station covers in the present embodiment is reasonable; Both realized seamless covering; Make again this Femto base station to the interference reduction of other base station to minimum; With respect to adopting the mode that directly is defaulted as maximum transmission power in the existing power self-configuring technology, be a kind of reasonable configuration more.
Embodiment two
Describe the process that cell parameter is disposed automatically among the embodiment one in detail, as an embodiment preferably, present embodiment also provides cell parameter has been carried out Automatic Optimal, and this Automatic Optimal is the process that reconfigures cell parameter.As shown in Figure 4, after said automatic configuration is accomplished, can also comprise the steps:
Step S6 is provided with and periodically optimizes timer;
Step S7 optimizes timer to after date when said periodicity, carries out the Automatic Optimal operation; Specifically comprise:
Step 701, Femto base station radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network again;
Step 702 according to the information of up-to-date each adjacent cell that listens to, is obtained the Neighboring Cell List of this Femto base station again, and accomplishes the Automatic Optimal of the Neighboring Cell List of this Femto base station;
Step S703 according to the information of up-to-date each adjacent cell that listens to, obtains the working frequency points of this Femto base station again, and accomplishes the Automatic Optimal of the working frequency points of this Femto base station;
Step S704 according to the information of up-to-date each adjacent cell that listens to, obtains the scrambler of this Femto base station again, and accomplishes the Automatic Optimal of the scrambler of this Femto base station;
Step S705 according to the information of up-to-date each adjacent cell that listens to, obtains the maximum transmission power of this Femto base station and the maximum transmission power of UE again, and accomplishes the Automatic Optimal of maximum transmission power of maximum transmission power and the UE of this Femto base station.
Again it is identical with method among the embodiment one to obtain the process of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and UE of this Femto base station according to the information of up-to-date each adjacent cell that listens in the present embodiment, will not give unnecessary details here.
Embodiment three
We have described the automatic configuration of SON and the process of Automatic Optimal in the foregoing description one and embodiment two, and present embodiment also provides the function of cell synchronizing on the former two's basis, to realize the whole implementation of SON.
As shown in Figure 5; In the whole implementation of SON; The Neighboring Cell List of said this Femto of obtaining base station and dispose automatically or Automatic Optimal after, obtain the working frequency points of this Femto base station and dispose automatically or Automatic Optimal before, also comprise step S21: the reference synchronization sub-district that obtains this Femto base station; And in the normal course of operation of Femto base station, the Femto base station is periodic carries out clock synchronization to keep the synchronous of minizone with said reference synchronization sub-district.
Preferably, above-mentioned process of carrying out cell synchronizing specifically can comprise the steps:
Step S211 according to the information of each adjacent cell that listens to, obtains the reference synchronization sub-district of this Femto base station;
Step S212 selects idle time slot execution cycle property minizone synchronous;
Step S213 then returns step S212 if cyclic cell is successful synchronously, if cyclic cell is successfully failed synchronously, then checks whether also to have candidate's reference synchronization sub-district, if exist, then continues execution minizone, next reference synchronization sub-district synchronous; If do not exist, then directly carry out SON self-configuring flow process.
Preferably, the process of obtaining the reference synchronization sub-district among the above-mentioned steps S211 specifically can comprise the steps:
Step S2111, working frequency points, scrambler, SNR value and the PCCPCH RSCP value of adjacent cell in the Neighboring Cell List of this sub-district of acquisition, Femto base station and the Neighboring Cell List;
Step S2112 selects that SNR value and PCCPCH RSCP value form candidate's reference synchronization cell list all above the sub-district of predetermined threshold in the said Neighboring Cell List;
Step S2113 if said candidate's reference synchronization cell list is not empty, then preferentially selects the maximum sub-district of SNR value as the reference synchronization sub-district from this candidate's reference synchronization cell list;
Step S2114; If said candidate's reference synchronization cell list is empty; Then carry out intercepting again to adjacent cell in the network; And then obtain the information such as frequency, scrambler, SNR value and PCCPCH RSCP value of each adjacent cell in Neighboring Cell List and the Neighboring Cell List of this sub-district, carry out the judgement of candidate's reference synchronization sub-district again.If said candidate's reference synchronization cell list is still for empty after repeatedly intercepting; It is the isolated island sub-district that this sub-district then is set; Handle according to the isolated island sub-district Femto base station, promptly disposes working frequency points, scrambler, the maximum transmission power of Femto base station and the maximum transmission power of UE of Femto base station according to the isolated island sub-district.
After the Femto base station obtains the reference synchronization sub-district; The physical layer of Femto base station need periodically be carried out synchronously; The Femto base station also need be in the idle signal strength signal intensity of monitoring the reference synchronization sub-district constantly of periodic synchronous simultaneously; When detecting the signal variation of reference synchronization sub-district, the reference synchronization sub-district that in time more renews makes that other sub-district in Femto base station and the network keeps synchronous better.
Embodiment four
Corresponding with the implementation method of SON in a kind of distributed Femto base station system of the present invention, the present invention also provides the implement device of SON in a kind of distributed Femto base station system, and is as shown in Figure 7, comprising:
Intercept module, be used for after the Femto base station powers on, radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network, and said adjacent cell comprises contiguous macro base station sub-district and contiguous Femto base station cell;
The self-configuring module; Be used for information according to each adjacent cell that listens to; Obtain Neighboring Cell List, working frequency points, scrambler, the maximum transmission power of Femto base station and the maximum transmission power of UE of this Femto base station, and accomplish the automatic configuration of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
Preferably, as shown in Figure 7, the implement device of the SON in the distributed Femto base station system in the present embodiment can also comprise:
Timer is provided with module, is used to be provided with periodically optimize timer;
The self-optimizing module is used for optimizing timer to after date when said periodicity, carries out the Automatic Optimal operation; Specifically comprise: Femto base station radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network again; Information according to up-to-date each adjacent cell that listens to; Again obtain the maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station, and accomplish the Automatic Optimal of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
Preferably, as shown in Figure 7, the implement device of the SON in the present embodiment in the distributed Femto base station system can also comprise:
The reference synchronization sub-district acquisition module that is connected respectively with said self-configuring module, self-optimizing module; Be used for after the Neighboring Cell List that obtains this Femto base station, obtain before the working frequency points of this Femto base station; According to the information of each adjacent cell that listens to, obtain the reference synchronization sub-district of this Femto base station;
The cell synchronizing module is used to select idle time slot execution cycle property minizone synchronous;
Judge module is used for checking whether also to have candidate's reference synchronization sub-district when the cyclic cell synchronization failure, if exist, then continues execution minizone, next reference synchronization sub-district synchronous; If do not exist, then directly carry out SON self-configuring flow process.
The implementation method of SON in a kind of distributed Femto base station system among other technical characterictic in the implement device of SON in a kind of distributed Femto base station system in the present embodiment and the embodiment one is identical, will not give unnecessary details here.
Embodiment five
The present invention also provides a kind of distributed Femto base station system, and it comprises at least one Femto base station of being mentioned in implementation method and the device of the SON in the distributed Femto base station system among above-mentioned several embodiment.
Can find out through above several embodiment; The present invention proposes implementation method, device and a kind of Femto base station of the SON in a kind of distributed Femto base station system completely newly; The Femto base station has automatic listening functions; When the Femto base station has just added network; The Femto base station through intercepting each adjacent cell in the network information and obtain and accomplish the automatic configuration of each item cell parameter according to the information of each adjacent cell that listens to, make the Femto base station system only need insert the Internet network and just can work automatically that the Femto base station just can obtain cell parameter and Automatic Optimal cell parameter automatically under the situation that does not need webmaster and extraneous intervention through the IP port; No longer need carry out the network planning and the network optimization just can operate as normal, has realized the purpose of the plug and play of Femto base station; And method of the present invention and device need not the terminal to report measured value, need not Signalling exchange, can reduce the interference of this Femto base station to other base station in the network adaptively, have improved network performance further.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (13)
1. the implementation method of the SON in the distributed Femto base station system is characterized in that, comprises the steps:
After the Femto base station powered on, radio frequency was set to listen mode, intercepted the information of each adjacent cell in the network, and said adjacent cell comprises contiguous macro base station sub-district and contiguous Femto base station cell;
Information according to each adjacent cell that listens to; Obtain the maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station, and accomplish the automatic configuration of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
2. the implementation method of the SON in the distributed Femto base station system according to claim 1 is characterized in that, also comprises step after said automatic configuration is accomplished:
Be provided with and periodically optimize timer;
Optimize timer to after date when said periodicity, carry out the Automatic Optimal operation; Specifically comprise: Femto base station radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network again; Information according to up-to-date each adjacent cell that listens to; Again obtain the maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station, and accomplish the Automatic Optimal of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
3. the implementation method of the SON in the distributed Femto base station system according to claim 1 and 2; It is characterized in that; After the Neighboring Cell List of said this Femto of obtaining base station, obtain before the working frequency points of this Femto base station, also comprise step: the reference synchronization sub-district that obtains this Femto base station; And in the normal course of operation of Femto base station, the Femto base station is periodic carries out clock synchronization to keep the synchronous of minizone with said reference synchronization sub-district, specifically comprises:
According to the information of each adjacent cell that listens to, obtain the reference synchronization sub-district of this Femto base station;
Select idle time slot execution cycle property minizone synchronous;
When the cyclic cell synchronization failure, check whether also to have candidate's reference synchronization sub-district, if exist, then continue execution minizone, next reference synchronization sub-district synchronous; If do not exist, then directly carry out SON self-configuring flow process.
4. the implementation method of the SON in the distributed Femto base station system according to claim 3; It is characterized in that the information of said each adjacent cell that listens to comprises: the reception signal strength values on the working frequency points of each adjacent cell, scrambler, PCCPCH RSCP value, SNR value and each carrier wave.
5. the implementation method of the SON in the distributed Femto base station system according to claim 4; It is characterized in that; The process that the information of the adjacent cell that said basis listens to is obtained the Neighboring Cell List of this Femto base station specifically comprises: sort to the PCCPCH RSCP value of each adjacent cell in the network that listens in the Femto base station; According to the size of said PCCPCH RSCP value, the sub-district of descending selection predetermined number forms the Neighboring Cell List of Femto base station.
6. the implementation method of the SON in the distributed Femto base station system according to claim 4 is characterized in that, the process that the information of each adjacent cell that said basis listens to is obtained the reference synchronization sub-district of this Femto base station specifically comprises:
Working frequency points, scrambler, SNR value and the PCCPCH RSCP value of each adjacent cell in the Neighboring Cell List of this sub-district of acquisition, Femto base station and the Neighboring Cell List;
Select that SNR value and PCCPCH RSCP value form candidate's reference synchronization cell list all above the sub-district of predetermined threshold in the said Neighboring Cell List;
If said candidate's reference synchronization cell list is not empty, then from this candidate's reference synchronization cell list, preferentially select the maximum sub-district of SNR value as the reference synchronization sub-district;
If said candidate's reference synchronization cell list is empty, then carry out intercepting again to adjacent cell in the network; If still for empty, it is the isolated island sub-district that this sub-district then is set to said candidate's reference synchronization cell list after repeatedly intercepting, handle according to the isolated island sub-district Femto base station.
7. the implementation method of the SON in the distributed Femto base station system according to claim 4 is characterized in that the process that the information of each adjacent cell that said basis listens to is obtained the working frequency points of this Femto base station specifically comprises:
Working frequency points, scrambler, PCCPCHRSCP value and the carrier wave of each adjacent cell receive signal strength values in the network that the Femto base station obtains to listen to;
The Femto base station obtains the operable candidate's frequency tabulation of this Femto;
The already used frequency in other sub-district that listens in the Femto base station acquisition network forms and intercepts the frequency tabulation;
Whether exist in the tabulation of Femto base station judges candidate frequency and do not belong to the frequency of intercepting the frequency tabulation; If exist; Then calculate the absolute value sum of this frequency and the difference of all frequencies of having listened to respectively, select wherein and the available frequency of frequency minimum as this Femto base station;
If said candidate's frequency tabulation is intercepted the frequency tabulation for the frequency in empty or said candidate's frequency tabulation all belongs to; Then obtain said carrier wave of intercepting each frequency in the frequency tabulation and receive signal strength values, choose carrier wave and receive the working frequency points of the minimum frequency of signal strength values as this Femto base station.
8. the implementation method of the SON in the distributed Femto base station system according to claim 4 is characterized in that the process that the information of each adjacent cell that said basis listens to is obtained the scrambler of this Femto base station specifically comprises:
The Femto base station obtains and the frequency point allocation information of this Femto base station with frequency, scrambler, PCCPCHRSCP value and this sub-district of all sub-districts frequently;
Adopt the alternative scrambling code distribution method, carry out basic scrambler set of dispense;
Carrying out downlink frequency pilot code distributes;
Distribute the scrambler of confirming this Femto base station according to said basic scrambler set of dispense and downlink frequency pilot code.
9. the implementation method of the SON in the distributed Femto base station system according to claim 4; It is characterized in that the process of maximum transmission power that the information of each adjacent cell that said basis listens to is obtained maximum transmission power and the UE of this Femto base station specifically comprises:
The working frequency points of working frequency points, scrambler, PCCPCHRSCP value and this sub-district of each adjacent cell in the network that the Femto base station obtains to listen to;
In the adjacent cell that listens to, search the maximum sub-district of PCCPCH RSCP value;
Obtain the maximum corresponding PCCPCH channel transmitting power in sub-district of PCCPCH RSCP value;
The minimum intensity of edge field intensity is set according to the requirement of cell edge field intensity in the actual overwrite procedure;
Adopt propagation model and link budget, calculate the base station of the maximum sub-district of PCCPCH RSCP value and the distance between this Femto base station, and calculate base station self covering radius of the maximum sub-district of PCCPCH RSCP value;
In conjunction with propagation model and link budget, adopt the principle of wireless coverage, what the coverage that this sub-district is set was above-mentioned distance with radius is poor, and obtains this Femto base station PCCPCH transmitting power;
A power bias value is set on the basis of this Femto base station PCCPCH transmitting power, and then obtains the maximum transmission power of Femto base station;
The maximum transmission power that said UE is set is identical with said PCCPCH transmitting power.
10. the implement device of SON in the distributed Femto base station system is characterized in that, comprising:
Intercept module, be used for after the Femto base station powers on, radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network, and said adjacent cell comprises contiguous macro base station sub-district and contiguous Femto base station cell;
The self-configuring module; Be used for information according to each adjacent cell that listens to; Obtain Neighboring Cell List, working frequency points, scrambler, the maximum transmission power of Femto base station and the maximum transmission power of UE of this Femto base station, and accomplish the automatic configuration of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
11. the implement device of the SON in the distributed Femto base station system according to claim 10 is characterized in that, also comprises:
Timer is provided with module, is used to be provided with periodically optimize timer;
The self-optimizing module is used for optimizing timer to after date when said periodicity, carries out the Automatic Optimal operation; Specifically comprise: Femto base station radio frequency is set to listen mode, intercepts the information of each adjacent cell in the network again; Information according to up-to-date each adjacent cell that listens to; Again obtain the maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station, and accomplish the Automatic Optimal of maximum transmission power of Neighboring Cell List, working frequency points, scrambler, maximum transmission power and the UE of this Femto base station.
12. the implement device of the SON in the distributed Femto base station system according to claim 11 is characterized in that, also comprises:
The reference synchronization sub-district acquisition module that is connected respectively with said self-configuring module, self-optimizing module; Be used for after the Neighboring Cell List that obtains this Femto base station, obtain before the working frequency points of this Femto base station; According to the information of each adjacent cell that listens to, obtain the reference synchronization sub-district of this Femto base station;
The cell synchronizing module is used to select idle time slot execution cycle property minizone synchronous;
Judge module is used for checking whether also to have candidate's reference synchronization sub-district when the cyclic cell synchronization failure, if exist, then continues execution minizone, next reference synchronization sub-district synchronous; If do not exist, then directly carry out SON self-configuring flow process.
13. a distributed Femto base station system is characterized in that, comprises that at least one is like any described Femto base station of claim 10-12.
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