CN101668294B - Method and system for reducing interferences - Google Patents
Method and system for reducing interferences Download PDFInfo
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- CN101668294B CN101668294B CN2008101193186A CN200810119318A CN101668294B CN 101668294 B CN101668294 B CN 101668294B CN 2008101193186 A CN2008101193186 A CN 2008101193186A CN 200810119318 A CN200810119318 A CN 200810119318A CN 101668294 B CN101668294 B CN 101668294B
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Abstract
The invention discloses a method for reducing interferences, which comprises the following steps that: auxiliary frequency point information is set in system information in advance; and a home base station searches an adjacent cell, and reads and selects frequency points on the basis of main frequency point information and the auxiliary frequency point information in the system information of the adjacent cell so as to plan the frequency points of a cell to be established. The invention also discloses a system for reducing the interferences, which comprises a setting unit, and a reading and planning unit, wherein the setting unit is used for setting the auxiliary frequency point information in the system information in advance; and the reading and planning unit is used for reading and selecting the frequency points on the basis of the main frequency point information and the auxiliary frequency point information in the system information of the adjacent cell from the setting unit so as to plan the frequency points of the cell to be established. By adopting the method and the system, the interferences generated between home base stations, and between the home bases stations and macro base stations can be effectively reduced.
Description
Technical field
The present invention relates to reduce the technology of interference, relate in particular to a kind of reduce between the Home eNodeB and Home eNodeB and macro base station between the method and system disturbed.
Background technology
At the beginning of the 3G networking, because userbase is little, therefore most of operators select to solve covering problem with grand covering scheme earlier, and then solve capacity problem.Here, so-called grand covering scheme is wide covering, is to adopt outdoor macro base station to cover most outdoor area to stress to solve the problem that improves coverage rate.Arrived the 3G business development stage, the userbase steady-state growth, after the user increases, a series of problems such as the user capacity that adopts extensive grand covering scheme certainly will cause inserting is not enough, message transmission rate descends and the user experience sense is bad.Yet at the beginning of the 3G networking, just open the professional user of 3G previously and be accustomed to using data service at a high speed; This moment, extensive grand covering scheme just can't satisfy covering demand, especially the covering demand of high-speed data service in the subscriber household zone of intensive residential block of high-speed data service in the home area well.The new planning if the overlay strategy of adjusting grand covering scheme according to user's covering characteristics is laid equal stress on certainly will cause that cost of investment is high, efficiency of investment is low and can't perceive series of problems such as high-value user.Like this, operator is difficult in coverage rate and capacity two aspects and does balance and choice.Introducing Home eNodeB especially Wireless Fidelity (wifi) Home eNodeB can done a balance aspect coverage rate and the capacity two as replenishing of macro base station.Present wifi Home eNodeB generally only is used for Packet Service (PS).
Wherein, Home eNodeB is used to cover most careat.Introduce Home eNodeB except can reducing cost of investment doing aspect coverage rate and the capacity two balance.Home eNodeB is different from macro base station; It is easy, as to need not a to dispose small base station; When the macro base station that is used to cover most of outdoor area in cooperation uses together; Basically can realize the seamless link of indoor and outdoors and the covering that becomes more meticulous of 3G, thus the advantage of the high-speed data service of performance 3G.And need not as the extensive grand covering scheme of single employing macro base station, design macro base station in advance earlier, then along with userbase, the particularly growth of the interior userbase of home area, the overlay strategy of the adjusting grand covering scheme new planning of laying equal stress on.Obviously the scheme that adopts Home eNodeB and macro base station to be used can reduce cost of investment greatly than the grand covering scheme of single employing macro base station.Home eNodeB is the technology that operator initiates; To be that equipment vendor promotes different with a lot of technology; Home eNodeB is the technology that operator is interested at first and actively promote; Reason is: Home eNodeB meets operator's reduction cost of investment and captures the strategy of home network market, reduces network construction cost simultaneously.But the scheme that adopts Home eNodeB and macro base station to be used can produce interference between the Home eNodeB and between Home eNodeB and the macro base station, causes the user experience sense to reduce.
Wherein, four kinds of network architectures of existing Home eNodeB and characteristics thereof are as follows.
As shown in Figure 1, first kind of network architecture is based on the framework of Iub interface.This framework comprises: fly promptly very little sub-district, midge sub-district (FemtoCELL), security gateway, radio network controller (RNC), mobile switching centre (MSC) and GPRS business support point (SGSN).Wherein, FemtoCELL links to each other with security gateway through Iub interface; Security gateway links to each other with RNC; RNC links to each other with MSC through Iu CS interface, and RNC links to each other with SGSN through Iu PS interface.Adopt this Architecture characteristic to be: the protocol stack distributional class distributes like present agreement, disposes simply, is convenient to Rapid Realization; Each FemtoCELL belongs to a RNC administration, and is removable in the RNC compass of competency, do not need SIM to carry out authentication; Transmission requirement to Iub interface is higher, but does not require strict timing relationship in view of HSDPA, only to the dedicated channel (DCH) of the low rate transmission delay of having relatively high expectations, so present 512K/1M ADSL can support; Configuration all is responsible for by RNC; The charging aspect is difficult to obtain otherness information.
As shown in Figure 2, second kind of network architecture is based on the framework of Iu interface.This framework comprises: FemtoCELL, security gateway, Iu concentrator, MSC and SGSN.Wherein, FemtoCELL links to each other with security gateway through the Iu interface; Security gateway links to each other with the IU concentrator; The IU concentrator links to each other with MSC through Iu CS interface, and the IU concentrator links to each other with SGSN through Iu PS interface.Adopt this Architecture characteristic to be: the Iu interface structure is more open than Iub interface, forms multi-vendor supply of material environment easily; The Iu interface can be simplified the function of concentrator, connects a plurality of FemtoCell easily; Iu interface single node is controlled, and avoids the synchronisation requirement of Iub interface; The interoffice signaling process simplification is the intra-exchange signaling flow process; Single node control; Evolve to the structure of conversation initialized protocol (SIP) easily, only need substitute I u agreement to get final product; The Iu interface is introduced Iu-Flex easily, has non-access node selection function (NNSF) mechanism; Because it is restive that FemtoCell inserts, and needs this mechanism to carry out load sharing.
As shown in Figure 3, the third network architecture is based on the framework of UMA interface.This framework comprises: FemtoCELL, general access network controller (GANC), MSC and SGSN.Wherein, FemtoCELL links to each other with GANC through the UMA interface; GANC links to each other with MSC through Iu CS interface, and GANC links to each other with SGSN through Iu PS interface.This Architecture characteristic is based on the framework basically identical of Iu interface with second kind of network architecture, but compares and need more change with second kind of network architecture.As shown in Figure 4, the 4th kind of network architecture is based on the framework of IP multimedia system (IMS), is the framework after 3GP is upgraded to 3G evolution technology (LTE), belongs to final planning.This framework comprises: the FemtoCELL, IMS System, GPRS router (GGSN) and the SGSN that link to each other.
Here, existing Home eNodeB can possess following requirement: Home eNodeB has the function of simulation UE; Function through simulation UE receive other cell informations that existed, automatically plan carrier frequency, automatically plan scrambler, plan and set up the adjacent area automatically in the adjacent area automatically; Home eNodeB has the signal that receives public macrocell, carries out the function of clock synchronization.But; To the scheme that adopts Home eNodeB and macro base station to be used; Disturb can producing between the Home eNodeB and between Home eNodeB and the macro base station, and solution also do not arranged at present as yet, can reduce between the Home eNodeB effectively and Home eNodeB and macro base station between the interference that produces; That is to say that existing Home eNodeB does not possess the sub-district and the interference between other sub-districts that make automatic foundation and is reduced to minimum function.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that reduces interference, can reduce between the Home eNodeB effectively and Home eNodeB and macro base station between the interference that produces.
Another object of the present invention is to provide a kind of system that reduces interference, can reduce between the Home eNodeB effectively and Home eNodeB and macro base station between the interference that produces.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method that reduces interference, this method may further comprise the steps:
A, in advance auxilliary frequency point information is set in system information;
B, Home eNodeB are searched for adjacent sub-district, read and select frequency based on main frequency point information in the said adjacent domain system information and said auxilliary frequency point information, plan the frequency of waiting to set up the sub-district.
Wherein, in the steps A, also comprise time slot transfer point information is set in system information in advance; Among the step B, also comprise and read and, plan the time slot transfer point of waiting to set up the sub-district based on the time slot transfer point Information Selection time slot transfer point in the said adjacent domain system information.
Wherein, among the step B, said planning waits that the frequency of setting up the sub-district is specially:
B11, in all adjacent sub-districts that search, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district;
B12, obtain the main frequency point information and the auxilliary frequency point information of said n adjacent sub-district, and by big to little ordering be: F1, F2, F3......Fn according to signal strength signal intensity;
B13, obtain and select frequency, make selected waiting set up frequency and the F1 of sub-district, F2, the whole alien frequencies of F3......Fn in the employable frequency range of current Home eNodeB.
Wherein, when the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn, it was consistent with Fn to make selected waiting set up the frequency of sub-district;
Perhaps, also comprise behind the step B13:
B14, obtain the main frequency point information of all adjacent sub-districts that search, and by big to little ordering be according to signal strength signal intensity: f1, f2, f3......fm, and m is the integer greater than n;
B15, obtain and select frequency, make selected waiting set up frequency and the f1 of sub-district, f2, the whole alien frequencies of f3......fm in the employable frequency range of all Home eNodeB.
Wherein, when the frequency of setting up the sub-district when selected waiting can't reach with f1, f2, the whole alien frequencies of f3......fm, it was consistent with fm to make selected waiting set up the frequency of sub-district.
Wherein, among the step B, said planning waits that the time slot transfer point of setting up the sub-district is specially:
B21, obtain and, make time slot transfer point that selected waiting set up the sub-district consistent with the said time slot transfer point of waiting to set up adjacent cells of cells based on the time slot transfer point Information Selection time slot transfer point of all adjacent sub-districts that search.
Wherein, when the said time slot transfer point of waiting to set up adjacent cells of cells is not quite identical, also comprise behind the B21:
B22, make time slot transfer point that selected waiting set up the sub-district and said to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
Wherein, also comprise behind the step B22: obtain and select scrambler, plan the scrambler of waiting to set up the sub-district based on the scrambling code information in all adjacent domain system information that search.
Wherein, said planning waits that the scrambler of setting up the sub-district is specially: when the said frequency of waiting to set up the sub-district and said when waiting to set up the frequency point co-frequency of adjacent cells of cells, make selected waiting set up the scrambler of sub-district and the scrambler quadrature of said co-frequency neighbor cell.
Wherein, With the said selected mode of waiting to set up frequency, time slot transfer point and the scrambler of sub-district accomplish wait to set up the planning of sub-district after; Home eNodeB continues the adjacent cells of cells to be set up that search meets said selected mode; Join and saidly wait to set up in the adjacent cells of cells tabulation, accomplish said planning of waiting to set up adjacent cells of cells.
A kind of system that reduces interference, this system comprises: the unit is set, reads and planning unit; Wherein,
The unit is set, is used in system information auxilliary frequency point information being set in advance;
Read and planning unit, be used for being provided with that the unit reads and selecting frequency, plan the frequency of waiting to set up the sub-district based on the main frequency point information and the said auxilliary frequency point information of adjacent domain system information from said.
Wherein, the said unit that is provided with is further used in system information, being provided with in advance time slot transfer point information; Said reading and planning unit is further used for being provided with from said that the unit reads and based on the time slot transfer point Information Selection time slot transfer point the said adjacent domain system information, plan the time slot transfer point of waiting to set up the sub-district.
Wherein, said reading and planning unit also is used for being provided with that the unit reads and selecting scrambler based on the scrambling code information of all adjacent domain system information that search from said, plans the scrambler of waiting to set up the sub-district.
Wherein, said read and planning unit comprises: wait to set up the frequency planning module of sub-district, be used for, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district in all adjacent sub-districts that search; Obtain the main frequency point information and the auxilliary frequency point information of said n adjacent sub-district, and by big extremely little ordering be: F1, F2, F3......Fn according to signal strength signal intensity; Obtain and select frequency, make selected waiting set up frequency and the F1 of sub-district, F2, the whole alien frequencies of F3......Fn in the employable frequency range of current Home eNodeB.
Wherein, when the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn, the said frequency planning module of waiting to set up the sub-district, the frequency that is further used for making selected waiting set up the sub-district is consistent with Fn.
Wherein, When the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn; The said frequency planning module of waiting to set up the sub-district; Be further used for obtaining the main frequency point information of all adjacent sub-districts that search, and by big extremely little ordering be according to signal strength signal intensity: f1, f2, f3......fm, and m is the integer greater than n; Obtain and select frequency, make selected waiting set up frequency and the f1 of sub-district, f2, the whole alien frequencies of f3......fm in the employable frequency range of all Home eNodeB.
Wherein, when the frequency of setting up the sub-district when selected waiting can't reach with f1, f2, the whole alien frequencies of f3......fm, the frequency that the said frequency planning module of waiting to set up the sub-district also is used to make selected waiting set up the sub-district was consistent with fm.
Wherein, Said read and planning unit comprises: the time slot transfer point planning module of waiting to set up the sub-district; Be used to obtain and based on the time slot transfer point Information Selection time slot transfer point of all adjacent sub-districts that search, make time slot transfer point that selected waiting set up the sub-district consistent with the said time slot transfer point of waiting to set up adjacent cells of cells.
Wherein, When the said time slot transfer point of waiting to set up adjacent cells of cells is not quite identical; The said time slot transfer point planning module of waiting to set up the sub-district, the time slot transfer point that is further used for making selected waiting set up the sub-district is with said to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
Wherein, Said read and planning unit comprises: the scrambling code planning module of waiting to set up the sub-district; Be used for making selected waiting set up the scrambler of sub-district and the scrambler quadrature of said co-frequency neighbor cell when the said frequency of waiting to set up the sub-district and said when waiting to set up the frequency point co-frequency of adjacent cells of cells.
Originally just be provided with main frequency point information in the system information; But it is not enough having only main frequency point information, even because dominant frequency point is different, it also is noisy between the adjacent sub-district that auxilliary frequency coexists mutually; Need further to utilize auxilliary frequency point information to plan the sub-district, disturb thereby reduce.The present invention has set up auxilliary frequency point information in advance in system information; Afterwards, Home eNodeB is searched for adjacent sub-district, reads and selects frequency based on the main frequency point information in the adjacent domain system information and auxilliary frequency point information, plans the frequency of waiting to set up the sub-district, just can reduce and wait to have set up the interference between sub-district and its adjacent sub-district.
Adopt the present invention, can reduce between the Home eNodeB effectively and Home eNodeB and macro base station between the interference that produces, the sub-district that Home eNodeB is possessed make automatic foundation and the interference between other sub-districts are reduced to the function of minimum.
Description of drawings
Fig. 1 is the composition sketch map of existing first kind of network architecture of Home eNodeB;
Fig. 2 is the composition sketch map of existing second kind of network architecture of Home eNodeB;
Fig. 3 is the composition sketch map of existing the third network architecture of Home eNodeB;
Fig. 4 is the composition sketch map of existing the 4th kind of network architecture of Home eNodeB;
Fig. 5 is the realization flow sketch map of the inventive method.
Embodiment
Core concept of the present invention is: the present invention has set up auxilliary frequency point information in advance in system information; Home eNodeB is searched for adjacent sub-district, reads and selects frequency based on the main frequency point information in the adjacent domain system information and auxilliary frequency point information, plans the frequency of waiting to set up the sub-district, can reduce and wait to set up the interference between sub-district and its adjacent sub-district.
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
As shown in Figure 5, a kind of method that reduces interference, this method may further comprise the steps:
Here it is to be noted; Owing to be provided with main frequency point information in the system information originally; But it is not enough having only main frequency point information, even because dominant frequency point is different, it also is noisy between the adjacent sub-district that auxilliary frequency coexists mutually; Need further to utilize auxilliary frequency point information to plan the sub-district, reach and reduce the purpose of disturbing.The present invention has set up auxilliary frequency point information in advance in system information, Home eNodeB starts the adjacent sub-district of search, back so, can search this Home eNodeB main frequency point information and the auxilliary frequency point information of adjacent sub-district on every side.
Here, in the step 101, also comprise time slot transfer point information is set in system information in advance; In the step 102, also comprise and read and, plan the time slot transfer point of waiting to set up the sub-district based on the time slot transfer point Information Selection time slot transfer point in the adjacent domain system information.
Here, in the step 102, also comprise and obtain and select scrambler, plan the scrambler of waiting to set up the sub-district based on the scrambling code information in all adjacent domain system information that search.
In sum; Through the selected mode of waiting to set up frequency, time slot transfer point and the scrambler of sub-district in the step 102 accomplish wait to set up the planning of sub-district after; Home eNodeB continues the adjacent cells of cells to be set up that search meets these three selected modes; Join this and wait to set up in the adjacent cells of cells tabulation, accomplish the planning that this waits to set up adjacent cells of cells.Afterwards, Home eNodeB is set up sub-district and adjacent cells of cells to be set up according to good the waiting of planning, sets up the sub-district automatically and accomplishes the foundation of sub-district.
Below to three kinds of selected modes, that is: the selected mode of waiting to set up subdistrict frequency point, the selected mode of waiting to set up sub-district time slot transfer point and the selected implementation procedure of waiting to set up the mode of cell scrambling is specifically set forth.
To the selected mode of waiting to set up subdistrict frequency point, in the step 102, planning waits that the frequency of setting up the sub-district is specially:
Step 1021a, in all adjacent sub-districts that search, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district.
Step 1022a, obtain the main frequency point information and the auxilliary frequency point information of n adjacent sub-district, and by big to little ordering be: F1, F2, F3......Fn according to signal strength signal intensity.
Step 1023a, obtain and select frequency, make selected waiting set up frequency and the F1 of sub-district, F2, the whole alien frequencies of F3......Fn in the employable frequency range of current Home eNodeB.
Here it is to be noted; In current Home eNodeB, embed SIM in advance; Write the operable frequency range of current Home eNodeB among the SIM; In this frequency range, the frequency of selection should with the frequency alien frequencies among the step 1022a, and guarantee that whole frequencies comprises dominant frequency point and assists frequency all is alien frequencies.The reason of handling like this is; Generally for avoiding interference, the frequency of outdoor macro base station and indoor Home eNodeB should be an alien frequencies, at this moment; Most important preventing also will guarantee alien frequencies between each Home eNodeB as far as possible, causes interference in order to avoid the frequency of selecting for use is identical.
Here, when the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn, first kind of solution was: it is consistent with the frequency of the sub-district of signal strength signal intensity minimum to make selected waiting set up the frequency of sub-district, is consistent with Fn.Second kind of solution is: have to take the second best, do not consider auxilliary frequency, only guarantee that the dominant frequency point is an alien frequencies.
To second kind of solution, also comprise behind the step 1023a:
Step 1024a, obtain the main frequency point information of all adjacent sub-districts that search, and by big to little ordering be according to signal strength signal intensity: f1, f2, f3......fm, and m is the integer greater than n.
Step 1025a, obtain and select frequency, make selected waiting set up frequency and the f1 of sub-district, f2, the whole alien frequencies of f3......fm in the employable frequency range of all Home eNodeB.
Here it is pointed out that in advance in other Home eNodeB, to embed SIM, write the operable frequency range of Home eNodeB among the SIM, in this frequency range, the frequency of selection should with the frequency alien frequencies among the step 1025a.And, when the frequency of setting up the sub-district when selected waiting can't reach with f1, f2, the whole alien frequencies of f3......fm, make the frequency of the minimum sub-district of frequency that selected waiting set up the sub-district and signal strength signal intensity consistent, be at this moment consistent with fm.
To the selected mode of waiting to set up sub-district time slot transfer point, in the step 102, planning waits that the time slot transfer point of setting up the sub-district is specially:
Step 1021b, obtain and, make time slot transfer point that selected waiting set up the sub-district consistent with the time slot transfer point of waiting to set up adjacent cells of cells based on the time slot transfer point Information Selection time slot transfer point of all adjacent sub-districts that search.
Here; When the time slot transfer point of waiting to set up adjacent cells of cells is not quite identical; The promptly selected time slot transfer point of waiting to set up the sub-district when inconsistent, also comprises step with the time slot transfer point of waiting to set up adjacent cells of cells behind the step 1021b: make time slot transfer point that selected waiting set up the sub-district and to wait to set up the sub-district consistent with the time slot transfer point of the adjacent sub-district of frequency.
Here it is pointed out that in sum can have interference because the time slot transfer point is different, preferably the time slot transfer point of neighbor cell is identical.Originally do not have time slot transfer point information in the system information, just can't guarantee that when carrying out plot planning the time slot transfer point is identical, therefore, the present invention is based on the time slot transfer point information of setting up in the system information and plan, can reduce interference.So, behind the time slot transfer point, need make time slot transfer point that selected waiting set up the sub-district and to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently at family's base station search.The reason of handling like this is, the time slot transfer point of only waiting to set up the sub-district with wait to set up the sub-district and just can accomplish to disturb minimum with the time slot transfer point of adjacent sub-district frequently is consistent.When waiting that it is not in full accord setting up adjacent cells of cells time slot transfer point; When the promptly selected time slot transfer point of waiting to set up the sub-district can't reach consistent with the time slot transfer point of waiting to set up adjacent cells of cells, the time slot transfer point that waiting of preferentially guaranteeing to select set up the sub-district was consistent with the time slot transfer point of waiting to set up the sub-district co-frequency neighbor cell.The reason of handling like this is that the interference between the co-frequency cell is maximum, has guaranteed the consistent interference that just can eliminate this maximum of time slot transfer point of co-frequency cell.
To the selected mode of waiting to set up cell scrambling, Home eNodeB reads the scrambling code information of adjacent sub-district from system information, analyzes and selected cell scrambling to be set up with frequency, plans the scrambler of waiting to set up the sub-district.Then in the step 102, planning waits that the scrambler of setting up the sub-district is specially: when waiting to set up the frequency of sub-district and waiting to set up the complete alien frequencies of frequency of adjacent cells of cells, and the not restriction of selected and distribution of scrambler; When the frequency of waiting to set up the sub-district when waiting to set up the frequency point co-frequency of adjacent cells of cells, make selected waiting set up the scrambler of sub-district and the scrambler quadrature of co-frequency neighbor cell, will distribute to selected sub-district to be set up with the scrambler of the scrambler quadrature of co-frequency neighbor cell after tabling look-up.
In sum; When the mode of waiting to set up cell scrambling with the said selected mode of waiting to set up subdistrict frequency point, the selected mode of waiting to set up sub-district time slot transfer point and selected accomplish wait to set up the planning of sub-district after; Home eNodeB continues the adjacent cells of cells to be set up that search meets these three selected modes; Join and wait to set up in the adjacent cells of cells tabulation, to satisfy follow-up mobility demand.Selected Home eNodeB waits to set up frequency, time slot transfer point and the scrambler of sub-district and its adjacent sub-district; After waiting to set up sub-district and its adjacent sub-district and all having accomplished planning; Home eNodeB is set up sub-district and adjacent cells of cells to be set up according to good the waiting of planning, sets up the sub-district automatically and accomplishes the foundation of sub-district.
A kind of system that reduces interference, this system comprises: the unit is set, reads and planning unit.Wherein, the unit being set is used in system information auxilliary frequency point information being set in advance.Read and planning unit is used for planning the frequency of waiting to set up the sub-district from being provided with that the unit reads and selecting frequency based on the main frequency point information and the said auxilliary frequency point information of adjacent domain system information.
Wherein, the unit is set and is further used in system information, being provided with in advance time slot transfer point information.Read and planning unit is further used for that the unit reads and based on the time slot transfer point Information Selection time slot transfer point the adjacent domain system information, plan the time slot transfer point of waiting to set up the sub-district from being provided with.And then, read and planning unit also is used for planning the scrambler of waiting to set up the sub-district from being provided with that the unit reads and selecting scrambler based on the scrambling code information of all adjacent domain system information that search.
Here,, read and planning unit comprises: wait to set up the frequency planning module of sub-district, be used for, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district in all adjacent sub-districts that search to reading and planning unit; Obtain the main frequency point information and the auxilliary frequency point information of n adjacent sub-district, and by big extremely little ordering be: F1, F2, F3......Fn according to signal strength signal intensity; Obtain and select frequency, make selected waiting set up frequency and the F1 of sub-district, F2, the whole alien frequencies of F3......Fn in the employable frequency range of current Home eNodeB.
Wherein, When the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn; A solution in this case is: wait to set up the frequency planning module of sub-district, the frequency that is further used for making selected waiting set up the sub-district is consistent with Fn.Another kind of solution is: wait to set up the frequency planning module of sub-district, be further used for obtaining the main frequency point information of all adjacent sub-districts that search, and according to signal strength signal intensity by big extremely little ordering be: f1, f2, f3......fm, and m is the integer greater than n; Obtain and select frequency, make selected waiting set up frequency and the f1 of sub-district, f2, the whole alien frequencies of f3......fm in the employable frequency range of all Home eNodeB.And when the frequency of setting up the sub-district when selected waiting can't reach with f1, f2, the whole alien frequencies of f3......fm, the frequency that the frequency planning module of waiting to set up the sub-district also is used to make selected waiting set up the sub-district was consistent with fm.
Here; To reading and planning unit; Read and planning unit comprises: the time slot transfer point planning module of waiting to set up the sub-district; Be used to obtain and based on the time slot transfer point Information Selection time slot transfer point of all adjacent sub-districts that search, make time slot transfer point that selected waiting set up the sub-district consistent with the time slot transfer point of waiting to set up adjacent cells of cells.
Wherein, When the time slot transfer point of waiting to set up adjacent cells of cells is not quite identical; Wait to set up the time slot transfer point planning module of sub-district, the time slot transfer point that is further used for making selected waiting set up the sub-district is with to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
Here; To reading and planning unit; Read and planning unit comprises: the scrambling code planning module of waiting to set up the sub-district; Be used for making selected waiting set up the scrambler of sub-district and the scrambler quadrature of this co-frequency neighbor cell when the frequency of waiting to set up the sub-district and said when waiting to set up the frequency point co-frequency of adjacent cells of cells.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (17)
1. a method that reduces interference is characterized in that, this method may further comprise the steps:
A, in advance auxilliary frequency point information is set in system information;
B, Home eNodeB are searched for adjacent sub-district, read and select frequency based on main frequency point information in the said adjacent domain system information and said auxilliary frequency point information, plan the frequency of waiting to set up the sub-district,
Among the step B, said planning waits that the frequency of setting up the sub-district is specially:
B11, in all adjacent sub-districts that search, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district;
B12, obtain the main frequency point information and the auxilliary frequency point information of said n adjacent sub-district, and by big to little ordering be: F1, F2, F3......Fn according to signal strength signal intensity;
B13, obtain and select frequency, make selected waiting set up frequency and the F1 of sub-district, F2, the whole alien frequencies of F3......Fn in the employable frequency range of current Home eNodeB.
2. method according to claim 1 is characterized in that, in the steps A, also comprises time slot transfer point information is set in system information in advance; Among the step B, also comprise and read and, plan the time slot transfer point of waiting to set up the sub-district based on the time slot transfer point Information Selection time slot transfer point in the said adjacent domain system information.
3. method according to claim 1 is characterized in that, when the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn, it was consistent with Fn to make selected waiting set up the frequency of sub-district;
Perhaps, also comprise behind the step B13:
B14, obtain the main frequency point information of all adjacent sub-districts that search, and by big to little ordering be according to signal strength signal intensity: f1, f2, f3......fm, and m is the integer greater than n;
B15, obtain and select frequency, make selected waiting set up frequency and the f1 of sub-district, f2, the whole alien frequencies of f3......fm in the employable frequency range of all Home eNodeB.
4. method according to claim 3 is characterized in that, when the frequency of setting up the sub-district when selected waiting can't reach with f1, f2, the whole alien frequencies of f3......fm, it was consistent with fm to make selected waiting set up the frequency of sub-district.
5. according to claim 3 or 4 described methods, it is characterized in that among the step B, said planning waits that the time slot transfer point of setting up the sub-district is specially:
B21, obtain and, make time slot transfer point that selected waiting set up the sub-district consistent with the said time slot transfer point of waiting to set up adjacent cells of cells based on the time slot transfer point Information Selection time slot transfer point of all adjacent sub-districts that search.
6. method according to claim 5 is characterized in that, when the said time slot transfer point of waiting to set up adjacent cells of cells is not quite identical, also comprises behind the B21:
B22, make time slot transfer point that selected waiting set up the sub-district and said to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
7. method according to claim 6 is characterized in that, also comprises behind the step B22: obtain and select scrambler based on the scrambling code information in all adjacent domain system information that search, plan the scrambler of waiting to set up the sub-district.
8. method according to claim 7; It is characterized in that; Said planning waits that the scrambler of setting up the sub-district is specially: when the said frequency of waiting to set up the sub-district and said when waiting to set up the frequency point co-frequency of adjacent cells of cells, make selected waiting set up the scrambler of sub-district and the scrambler quadrature of said co-frequency neighbor cell.
9. method according to claim 8; It is characterized in that; With the said selected mode of waiting to set up frequency, time slot transfer point and the scrambler of sub-district accomplish wait to set up the planning of sub-district after; Home eNodeB continues the adjacent cells of cells to be set up that search meets said selected mode, joins saidly to wait to set up in the adjacent cells of cells tabulation, accomplishes said planning of waiting to set up adjacent cells of cells.
10. a system that reduces interference is characterized in that, this system comprises: the unit is set, reads and planning unit; Wherein,
The unit is set, is used in system information auxilliary frequency point information being set in advance;
Read and planning unit, be used for being provided with that the unit reads and selecting frequency, plan the frequency of waiting to set up the sub-district based on the main frequency point information and the said auxilliary frequency point information of adjacent domain system information from said,
Wherein, said reading and planning unit also is used for being provided with that the unit reads and selecting scrambler based on the scrambling code information of all adjacent domain system information that search from said, plans the scrambler of waiting to set up the sub-district,
And wherein, said read and planning unit comprises: wait to set up the frequency planning module of sub-district, be used for, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district in all adjacent sub-districts that search; Obtain the main frequency point information and the auxilliary frequency point information of said n adjacent sub-district, and by big extremely little ordering be: F1, F2, F3......Fn according to signal strength signal intensity; Obtain and select frequency, make selected waiting set up frequency and the F1 of sub-district, F2, the whole alien frequencies of F3......Fn in the employable frequency range of current Home eNodeB.
11. system according to claim 10 is characterized in that, the said unit that is provided with is further used in system information, being provided with in advance time slot transfer point information; Said reading and planning unit is further used for being provided with from said that the unit reads and based on the time slot transfer point Information Selection time slot transfer point the said adjacent domain system information, plan the time slot transfer point of waiting to set up the sub-district.
12. system according to claim 10; It is characterized in that; When the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn, the said frequency planning module of waiting to set up the sub-district, the frequency that is further used for making selected waiting set up the sub-district is consistent with Fn.
13. system according to claim 10; It is characterized in that; When the frequency of setting up the sub-district when selected waiting can't reach with F1, F2, the whole alien frequencies of F3......Fn, the said frequency planning module of waiting to set up the sub-district was further used for obtaining the main frequency point information of all adjacent sub-districts that search; And by big to little ordering be according to signal strength signal intensity: f1, f2, f3......fm, and m is the integer greater than n; Obtain and select frequency, make selected waiting set up frequency and the f1 of sub-district, f2, the whole alien frequencies of f3......fm in the employable frequency range of all Home eNodeB.
14. system according to claim 13; It is characterized in that; When the frequency of setting up the sub-district when selected waiting can't reach with f1, f2, the whole alien frequencies of f3......fm, the frequency that the said frequency planning module of waiting to set up the sub-district also is used to make selected waiting set up the sub-district was consistent with fm.
15. system according to claim 10; It is characterized in that; Said read and planning unit comprises: the time slot transfer point planning module of waiting to set up the sub-district; Be used to obtain and based on the time slot transfer point Information Selection time slot transfer point of all adjacent sub-districts that search, make time slot transfer point that selected waiting set up the sub-district consistent with the said time slot transfer point of waiting to set up adjacent cells of cells.
16. system according to claim 15; It is characterized in that; When the said time slot transfer point of waiting to set up adjacent cells of cells is not quite identical; The said time slot transfer point planning module of waiting to set up the sub-district, the time slot transfer point that is further used for making selected waiting set up the sub-district is with said to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
17. system according to claim 10; It is characterized in that; Said read and planning unit comprises: the scrambling code planning module of waiting to set up the sub-district; Be used for making selected waiting set up the scrambler of sub-district and the scrambler quadrature of said co-frequency neighbor cell when the said frequency of waiting to set up the sub-district and said when waiting to set up the frequency point co-frequency of adjacent cells of cells.
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| CN101969645B (en) * | 2009-07-27 | 2013-09-11 | 华为技术有限公司 | Interference treatment method and home base station |
| CN102238660B (en) * | 2010-04-30 | 2013-08-14 | 鼎桥通信技术有限公司 | Cell reselection method |
| CN102244870B (en) * | 2010-05-15 | 2014-09-10 | 中兴通讯股份有限公司 | Method and system for configuring Femto frequencies |
| CN102065461B (en) * | 2011-01-19 | 2013-07-31 | 上海大唐移动通信设备有限公司 | Home base station information configuring and processing method and device |
| CN104869614B (en) * | 2014-02-26 | 2018-09-14 | 普天信息技术有限公司 | A kind of processing method of current sector frequency point information |
| CN103813347B (en) * | 2014-02-28 | 2018-01-26 | 电信科学技术研究院 | A kind of base station frequency resource allocation method and the network equipment |
| CN104053159B (en) * | 2014-06-19 | 2018-02-27 | 京信通信系统（中国）有限公司 | The frequency collocation method and device of a kind of Multi-Carrier basestation |
| CN107396287B (en) * | 2017-07-14 | 2020-10-20 | 深圳市盛路物联通讯技术有限公司 | Method and device for selecting working frequency points |
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