CN101668294A - Method and system for reducing interferences - Google Patents
Method and system for reducing interferences Download PDFInfo
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- CN101668294A CN101668294A CN200810119318A CN200810119318A CN101668294A CN 101668294 A CN101668294 A CN 101668294A CN 200810119318 A CN200810119318 A CN 200810119318A CN 200810119318 A CN200810119318 A CN 200810119318A CN 101668294 A CN101668294 A CN 101668294A
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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 theadjacent 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 asto 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 adopt extensive grand covering scheme certainly will cause that the user capacity that inserts is not enough, message transmission rate descends and the user experience sense is bad.Yet the user who just opens the 3G business at the beginning of the 3G networking previously has been 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 the cost of investment height, efficiency of investment is low and can't perceives 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, substantially 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 grand covering scheme as single employing macro base station extensive style, and design macro base station in advance earlier, then along with userbase, the particularly growth of userbase in the 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 by Iub interface; Security gateway links to each other with RNC; RNC links to each other with MSC by Iu CS interface, and RNC links to each other with SGSN by Iu PS interface.Adopt this Architecture characteristic to be: the protocol stack distributional class distributes like present agreement, disposes simply, is convenient to quick realization; Each FemtoCELL belongs to a RNC administration, and is removable in the RNC compass of competency, do not need SIM card 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 by the Iu interface; Security gateway links to each other with the IU concentrator; The IU concentrator links to each other with MSC by Iu CS interface, and the IU concentrator links to each other with SGSN by 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 by the UMA interface; GANC links to each other with MSC by Iu CS interface, and GANC links to each other with SGSN by 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: FemtoCELL, the 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 by 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, at 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, and solution is not arranged as yet also at present, 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 described adjacent domain system information and described 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 described adjacent domain system information.
Wherein, among the step B, described 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 described n adjacent sub-district, and sort from large to small according to signal strength signal intensity and to be: F1, F2, F3......Fn;
B13, obtain and the frequency range that can use at current Home eNodeB is selected frequency, make selected waiting set up the frequency of sub-district and F1, F2, the whole alien frequencies of F3......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, 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 sort from large to small according to signal strength signal intensity and to be: f1, f2, f3......fm, and m is the integer greater than n;
B15, obtain and the frequency range that can use at all Home eNodeB is selected frequency, make selected waiting set up the frequency of sub-district and f1, f2, the whole alien frequencies of f3......fm.
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, described 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 described 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 described 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 described 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, described planning waits that the scrambler of setting up the sub-district is specially: when the described frequency of waiting to set up the sub-district and described 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 described co-frequency neighbor cell.
Wherein, with the described selected mode of waiting to set up frequency, time slot transfer point and the scrambler of sub-district finish 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 described selected mode, join and describedly wait to set up in the adjacent cells of cells tabulation, finish described 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 described auxilliary frequency point information of adjacent domain system information from described.
Wherein, the described unit that is provided with is further used for being provided with in advance time slot transfer point information in system information; Described reading and planning unit is further used for being provided with from described that the unit reads and based on the time slot transfer point Information Selection time slot transfer point the described adjacent domain system information, plan the time slot transfer point of waiting to set up the sub-district.
Wherein, described 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 described, plans the scrambler of waiting to set up the sub-district.
Wherein, described 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 described n adjacent sub-district, and sort from large to small according to signal strength signal intensity and to be: F1, F2, F3......Fn; The frequency range of obtaining and using at current Home eNodeB is selected frequency, makes selected waiting set up the frequency of sub-district and F1, F2, the whole alien frequencies of F3......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 described 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 described 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 sort from large to small according to signal strength signal intensity and to be: f1, f2, f3......fm, and m is the integer greater than n; The frequency range of obtaining and using at all Home eNodeB is selected frequency, makes selected waiting set up the frequency of sub-district and f1, f2, the whole alien frequencies of f3......fm.
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 described 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, described 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 described time slot transfer point of waiting to set up adjacent cells of cells.
Wherein, when the described time slot transfer point of waiting to set up adjacent cells of cells is not quite identical, the described 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 described to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
Wherein, described 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 described co-frequency neighbor cell when the described frequency of waiting to set up the sub-district and described 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 schematic diagram of existing first kind of network architecture of Home eNodeB;
Fig. 2 is the composition schematic diagram of existing second kind of network architecture of Home eNodeB;
Fig. 3 is the composition schematic diagram of existing the third network architecture of Home eNodeB;
Fig. 4 is the composition schematic diagram of existing the 4th kind of network architecture of Home eNodeB;
Fig. 5 is the realization flow schematic diagram 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 the interference of waiting to set up between sub-district and its adjacent sub-district.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 5, a kind of method that reduces interference, this method may further comprise the steps:
Step 101, in advance auxilliary frequency point information is set in system information.
Step 102, Home eNodeB are searched for adjacent sub-district, read and select frequency based on the main frequency point information in the adjacent domain system information and auxilliary frequency point information, plan the frequency of waiting to set up the sub-district.
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, because even 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, by the selected mode of waiting to set up frequency, time slot transfer point and the scrambler of sub-district in the step 102 finish 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, finish 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 finishes 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 are specifically addressed.
At 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 sort from large to small according to signal strength signal intensity and to be: F1, F2, F3......Fn.
Step 1023a, obtain and the frequency range that can use at current Home eNodeB is selected frequency, make selected waiting set up the frequency of sub-district and F1, F2, the whole alien frequencies of F3......Fn.
Here it is to be noted, in current Home eNodeB, embed SIM card in advance, write the operable frequency range of current Home eNodeB among the SIM, in this frequency range, the frequency of selecting 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 Chu Liing is like this, 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.
At 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 sort from large to small according to signal strength signal intensity and to be: f1, f2, f3......fm, and m is the integer greater than n.
Step 1025a, obtain and the frequency range that can use at all Home eNodeB is selected frequency, make selected waiting set up the frequency of sub-district and f1, f2, the whole alien frequencies of f3......fm.
Here it is pointed out that in advance in other Home eNodeB, to embed SIM card, 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, it was 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 at this moment consistent with fm.
At 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 Chu Liing is like this, only waits to set up the time slot transfer point and the consistent interference minimum of just accomplishing of time slot transfer point of waiting to set up same adjacent sub-district frequently, sub-district of sub-district.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 Chu Liing is like this, and the interference maximum between the co-frequency cell has guaranteed the consistent interference that just can eliminate this maximum of time slot transfer point of co-frequency cell.
At 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, the selected and distribution of scrambler without limits; 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 finish with the described 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 mode of waiting to set up cell scrambling 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 finished 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 finishes 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 described 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 at reading and planning unit; Obtain the main frequency point information and the auxilliary frequency point information of n adjacent sub-district, and sort from large to small according to signal strength signal intensity and to be: F1, F2, F3......Fn; The frequency range of obtaining and using at current Home eNodeB is selected frequency, makes selected waiting set up the frequency of sub-district and F1, F2, the whole alien frequencies of F3......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, 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 sort from large to small according to signal strength signal intensity and to be: f1, f2, f3......fm, and m is the integer greater than n; The frequency range of obtaining and using at all Home eNodeB is selected frequency, makes selected waiting set up the frequency of sub-district and f1, f2, the whole alien frequencies of f3......fm.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, at 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, at 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 described when waiting to set up the frequency point co-frequency of adjacent cells of cells.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (20)
1, a kind of 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 described adjacent domain system information and described auxilliary frequency point information, plan the frequency of waiting to set up the sub-district.
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 described adjacent domain system information.
3, method according to claim 1 and 2 is characterized in that, among the step B, described 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 described n adjacent sub-district, and sort from large to small according to signal strength signal intensity and to be: F1, F2, F3......Fn;
B13, obtain and the frequency range that can use at current Home eNodeB is selected frequency, make selected waiting set up the frequency of sub-district and F1, F2, the whole alien frequencies of F3......Fn.
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......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 sort from large to small according to signal strength signal intensity and to be: f1, f2, f3......fm, and m is the integer greater than n;
B15, obtain and the frequency range that can use at all Home eNodeB is selected frequency, make selected waiting set up the frequency of sub-district and f1, f2, the whole alien frequencies of f3......fm.
5, method according to claim 4 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.
According to claim 4 or 5 described methods, it is characterized in that 6, among the step B, described 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 described 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.
7, method according to claim 6 is characterized in that, when the described 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 described to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
8, method according to claim 7 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.
9, method according to claim 8, it is characterized in that, described planning waits that the scrambler of setting up the sub-district is specially: when the described frequency of waiting to set up the sub-district and described 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 described co-frequency neighbor cell.
10, method according to claim 9, it is characterized in that, with the described selected mode of waiting to set up frequency, time slot transfer point and the scrambler of sub-district finish 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 described selected mode, join and describedly wait to set up in the adjacent cells of cells tabulation, finish described planning of waiting to set up adjacent cells of cells.
11, a kind of 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 described auxilliary frequency point information of adjacent domain system information from described.
12, system according to claim 11 is characterized in that, the described unit that is provided with is further used for being provided with in advance time slot transfer point information in system information; Described reading and planning unit is further used for being provided with from described that the unit reads and based on the time slot transfer point Information Selection time slot transfer point the described adjacent domain system information, plan the time slot transfer point of waiting to set up the sub-district.
13, according to claim 11 or 12 described systems, it is characterized in that, described 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 described, plans the scrambler of waiting to set up the sub-district.
14, system according to claim 13 is characterized in that, described read and planning unit comprises: wait to set up the frequency planning module of sub-district, be used in all adjacent sub-districts that search, select to satisfy the strongest n of signal strength signal intensity adjacent sub-district; Obtain the main frequency point information and the auxilliary frequency point information of described n adjacent sub-district, and sort from large to small according to signal strength signal intensity and to be: F1, F2, F3......Fn; The frequency range of obtaining and using at current Home eNodeB is selected frequency, makes selected waiting set up the frequency of sub-district and F1, F2, the whole alien frequencies of F3......Fn.
15, system according to claim 14, 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 described 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.
16, system according to claim 14, 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 described 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 sort from large to small according to signal strength signal intensity and to be: f1, f2, f3......fm, and m is the integer greater than n; The frequency range of obtaining and using at all Home eNodeB is selected frequency, makes selected waiting set up the frequency of sub-district and f1, f2, the whole alien frequencies of f3......fm.
17, system according to claim 16, 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 described 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.
18, system according to claim 13, it is characterized in that, described 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 described time slot transfer point of waiting to set up adjacent cells of cells.
19, system according to claim 18, it is characterized in that, when the described time slot transfer point of waiting to set up adjacent cells of cells is not quite identical, the described 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 described to wait to set up the sub-district consistent with the time slot transfer point of adjacent sub-district frequently.
20, system according to claim 13, it is characterized in that, described 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 described co-frequency neighbor cell when the described frequency of waiting to set up the sub-district and described when waiting to set up the frequency point co-frequency of adjacent cells of cells.
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| CN2008101193186A CN101668294B (en) | 2008-09-03 | 2008-09-03 | Method and system for reducing interferences |
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| WO2011012067A1 (en) * | 2009-07-27 | 2011-02-03 | 华为技术有限公司 | Interference processing method and home base station |
| CN102065461A (en) * | 2011-01-19 | 2011-05-18 | 上海大唐移动通信设备有限公司 | Home base station information configuring and processing method and device |
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