CN102638807B - A kind of descending interference defining method and device - Google Patents
A kind of descending interference defining method and device Download PDFInfo
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- CN102638807B CN102638807B CN201110038662.4A CN201110038662A CN102638807B CN 102638807 B CN102638807 B CN 102638807B CN 201110038662 A CN201110038662 A CN 201110038662A CN 102638807 B CN102638807 B CN 102638807B
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Abstract
The invention provides a kind of descending interference defining method and device, the method is applied to the system comprising theaomni-directional transmission directional reception (OTSR) base station, comprise: to the selected pixel of main Serving cell, calculate the Reference Signal Received Power that each cell transmission signal covers this selected pixel, wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community; The interfered cell of described pixel is chosen from described each community; Transmit according to the described interfered cell chosen and cover the Reference Signal Received Power of described pixel, determine descending total interference of described pixel.This device comprises: computing module, choose module and determination module.Can the descending interference simulation of OTSR base station configuration in accurate analog LTE network by the present invention, and the network performance evaluation in later stage and Capacity Simulation.
Description
Technical field
The present invention relates to the network planning in wireless communication field and emulation, particularly, relate to a kind of based on OTSR (Omni Transmission Sectorized Receive, theaomni-directional transmission directional reception) defining method of technology descending interference in the lte networks and device, planning and designing and the network capacity emulation of new network or dilatation network can be applied to.
Background technology
At LTE (Long Term Evolution, long evolving system) the networking initial stage, the covering quality of wireless network directly can have influence on the experience of user, simultaneously with lower one-tenth originally built one effectively cover and capacity can with number of users increase progressively and the wireless network of smooth evolution also becomes the problem that operator is concerned about the most.OTSR technology is exactly in this context, in order to one of solution that the networking initial investment of saving, protecting mobile operator proposes.The erection of OTSR base station is consistent with three sector configuration of standard, carries multiple antenna direction by a logic district, adopts theaomni-directional transmission, directional reception, obtains the coverage effect of Directing Station with the collocation form at omnidirectional station.
Under traditional mode, wireless network planning emulation is mainly carried out for three sector base stations of standard, and in 2G/3G, merges OTSR technology also mainly in the scenes such as remote districts and highway.Therefore the simulating scenes for the network planning of OTSR site type is few.Because the interference calculation in legacy system emulation does not also relate to such scene, therefore cannot the descending interference simulation of OTSR base station configuration in accurate analog LTE network and the network performance evaluation in later stage and Capacity Simulation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of descending interference defining method based on theaomni-directional transmission directional reception (OTSR) technology and device, with the descending interference simulation of OTSR base station configuration in accurate analog LTE network.
In order to solve the problems of the technologies described above, the invention provides a kind of descending interference defining method, be applied to the system comprising theaomni-directional transmission directional reception (OTSR) base station, the method comprises:
To the selected pixel of main Serving cell, calculate the Reference Signal Received Power that each cell transmission signal covers this selected pixel, wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community;
The interfered cell of described pixel is chosen from described each community;
Transmit according to the described interfered cell chosen and cover the Reference Signal Received Power of described pixel, determine descending total interference of described pixel.
Further, said method also has feature below: the step choosing the interfered cell of described pixel from described community comprises:
The Reference Signal Received Power that choosing transmits covers described pixel is greater than the interfered cell of community as described pixel of predetermined threshold; Or
Choosing transmits covers the interfered cell of R the highest community of the Reference Signal Received Power of described pixel as described pixel, and R is preset value, R >=1.
Further, said method also has feature below: calculate a cell transmission signal and cover main Serving cell to select the mode of the Reference Signal Received Power M of pixel as follows:
When described pixel is positioned at the central area of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
1; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2+P
2;
When described pixel is positioned at the fringe region of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
2; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2,
Wherein, P
1for this community transmitting in the frequency range of central area covers the Reference Signal Received Power of described pixel, P
2for transmitting in this community edge region frequency range covers the Reference Signal Received Power of described pixel.
Further, said method also has feature below: if described community is OTSR antenna Gong Fen community, then
P
1transmitting power-10log (N)+antenna gain-total losses of logic district in the frequency range of central area belonging to=described OTSR antenna Gong Fen community;
P
2transmitting power-10log (N)+antenna gain-total losses in logic district edge region frequency range belonging to=described OTSR antenna Gong Fen community;
Wherein, N equals the number of the radio-frequency antenna of the logic district belonging to described OTSR antenna Gong Fen community.
Further, said method also has feature below: if described in the interfered cell chosen comprise the OTSR antenna Gong Fen community that two or more belongs to same logic district, the interfered cell chosen described in described basis transmits and covers the Reference Signal Received Power of described pixel, determines that the step of descending total interference of described pixel comprises:
Travel through described interfered cell one by one, the Reference Signal Received Power dividing cell transmission signal to cover described pixel the OTSR antenna merit belonging to same logic district is multiplied by a commutation factor after being added, and then be added with other interfered cells Reference Signal Received Power covering described pixel that transmits, obtain descending total interference of described pixel, wherein, commutation factor < 1 described in 0 <.
In order to solve the problem, present invention also offers a kind of device determining descending interference, be applied to the system comprising theaomni-directional transmission directional reception (OTSR) base station, comprising:
Computing module, for the selected pixel to main Serving cell, calculates the Reference Signal Received Power that each cell transmission signal covers this selected pixel, and wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community;
Choose module, for choosing the interfered cell of described pixel from described each community;
Determination module, the interfered cell chosen for choosing module described in basis transmits and covers the Reference Signal Received Power of described pixel, determines descending total interference of described pixel.
Further, said apparatus also has feature below: described in choose module and at least comprise one of lower unit:
First chooses unit, is greater than the interfered cell of community as described pixel of predetermined threshold for choosing the Reference Signal Received Power that covers described pixel of transmitting; Or
Second chooses unit, and for choosing the interfered cell of R the highest community of the Reference Signal Received Power that covers described pixel of transmitting as described pixel, R is preset value, R >=1.
Further, said apparatus also has feature below: described computing module calculates a cell transmission signal and covers main Serving cell to select the mode of the Reference Signal Received Power M of pixel as follows:
When described pixel is positioned at the central area of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
1; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2+P
2;
When described pixel is positioned at the fringe region of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
2; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2,
Wherein, P
1for this community transmitting in the frequency range of central area covers the Reference Signal Received Power of described pixel, P
2for transmitting in this community edge region frequency range covers the Reference Signal Received Power of described pixel.
Further, said apparatus also has feature below: if described community is OTSR antenna Gong Fen community, then
P
1transmitting power-10log (N)+antenna gain-total losses of logic district in the frequency range of central area belonging to=described OTSR antenna Gong Fen community;
P
2transmitting power-10log (N)+antenna gain-total losses in logic district edge region frequency range belonging to=described OTSR antenna Gong Fen community;
Wherein, N equals the number of the radio-frequency antenna of the logic district belonging to described OTSR antenna Gong Fen community.
Further, said apparatus also has feature below: if described in the interfered cell chosen comprise the OTSR antenna Gong Fen community that two or more belongs to same logic district, then described determination module determines that descending total interference of described pixel is specially:
Travel through described interfered cell one by one, the Reference Signal Received Power dividing cell transmission signal to cover described pixel the OTSR antenna merit belonging to same logic district is multiplied by a commutation factor after being added, and then be added with other interfered cells Reference Signal Received Power covering described pixel that transmits, obtain descending total interference of described pixel, wherein, commutation factor < 1 described in 0 <.
To sum up, the invention provides a kind of descending interference defining method based on theaomni-directional transmission directional reception (OTSR) technology and device, can network plan simulation precision be improved, and reduce the cost of later stage optimization, better can reflect the real network performance of LTE.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of OTSR Gong Fen community;
Fig. 2 is the schematic diagram that Q is positioned at OTSR merit and divides the Non-overlapping Domain of MPS process;
Fig. 3 is the schematic diagram that Q is positioned at OTSR merit and divides the overlapping region of MPS process;
Fig. 4 is the flow chart of the descending interference defining method of the embodiment of the present invention;
Fig. 5 is the schematic diagram that the embodiment of the present invention fixs the device of row interference really.
Embodiment
Main purpose of the present invention is to provide a kind of descending interference defining method based on OTSR technology and device, in LTE network planning simulation, needs the base station configuration considering standard base station configuration and OTSR merit divided antenna to carry out descending interference and determines.
In order to understand the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is further described.
Fig. 1 is the schematic diagram of OTSR Gong Fen community, as shown in Figure 1, according to the mode of merit divided antenna, by a logic district by splitter at a RRU (Remote Radio Unite, far-end RF module) upper configuration multiple RF (Radio Frequency, radio frequency) antenna.A set of RRU and BBU (Building Baseband Unite, indoor baseband processing unit) shared by multiple RF antenna, therefore belongs to a logic district.
Need to carry out Resourse Distribute and ICIC (Inter CellInterference Coordination, Inter-Cell Interference Coordination) frequency allocation to the community of planning before calculating interference.For the RF antenna that each merit is divided away (i.e. OTSR Gong Fen community), the transmitting power-10log (N) of its transmitting power=community, N are the RF antenna number of this logic district.
For the interference of certain pixel (Pixel point) Q of main Serving cell, RSRP (the Reference Signal Receiving Power being covered Q point by cumulative interfered cell in network plan simulation, Reference Signal Received Power) draw, quantity A and/or thresholding B that selection interfered cell is set can be carried out simultaneously.Be normal cell or OTSR Gong Fen community for interfered cell, this community can be adjudicated by A and/or B pre-set and whether can enter interfered cell list.
In the configuration scene of merit divided antenna, the Q overlapping region that under may being positioned at certain independent merit divided antenna (Ye Chenggongfen community) overlay area under a logic district or a logic district, multiple merit divided antenna covers.
When Q is positioned at the Non-overlapping Domain of merit divided antenna covering (as shown in Figure 2), transmitting power after then dividing according to merit divides MPS process to the RSRP of Q point to calculate this merit, wherein, this merit divides MPS process can be obtained by following formula to the RSRP (representing with M) of Q point:
Transmitting power-10log (N)+antenna gain-total losses of M=logic district;
Wherein, antenna gain comprises cell side antenna gain and receiving terminal antenna gain, and total losses comprise: feeder loss, propagated loss, building wear damage, human body loss and atural object shadow fading etc.
When the plural merit that Q is positioned under same logic district divides the region of little area overlapping (as shown in Figure 3), then need to divide MPS process to merge to the RSRP of Q point to multiple merit under a logic district.
Finally, effective interfered cell list of each pixel is traveled through, the RSRP covering Q point that transmitted interfered cell in the list of interfered cell adds up, obtain descending total interference of each pixel, descending total interference of each pixel and Traffic Channel received power finally can be utilized to calculate descending SINR (Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio), for assessment of channel quality.
Method of the present invention can be applied to the network plan simulation stage, in descending interference is determined, because the interfered cell list of each pixel in current service cell can change because of the merit divided antenna configuration of community, therefore corresponding interference determination result also can change.Traditional wireless system emulation then cannot simulate change situation before and after the interference after introducing merit divided antenna, and therefore the present invention better can promote network plan simulation precision, meanwhile reduces the work of the later stage network optimization.
Fig. 4 is the flow chart of the descending interference defining method of the embodiment of the present invention, and as shown in Figure 4, this defining method comprises step below:
S10, selected pixel to main Serving cell, calculate the Reference Signal Received Power that each cell transmission signal covers this selected pixel, wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community;
S20, from described each community, choose the interfered cell of described pixel;
The interfered cell chosen described in S30, basis transmits and covers the RSRP of described pixel, determines descending total interference of described pixel.
In step S10, from described community, choose the interfered cell of described pixel, can be chosen by pre-defined rule below, particularly, below can at least comprising one of in rule, but be not limited to this:
Rule 1, the RSRP choosing the selected pixel covering main Serving cell that transmits are greater than the community of predetermined threshold as interfered cell;
Rule 2, choose R the highest community of the RSRP of the selected pixel covering main Serving cell that transmits as interfered cell, R is preset value, R >=1.
Wherein, calculate cell transmission signal to cover main Serving cell to select the mode of the Reference Signal Received Power M of pixel as follows:
When described pixel is positioned at the central area of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
1; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2+P
2;
When described pixel is positioned at the fringe region of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
2; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2,
Wherein, P
1for this community transmitting in the frequency range of central area covers the Reference Signal Received Power of described pixel, P
2for transmitting in this community edge region frequency range covers the Reference Signal Received Power of described pixel.
If described community is OTSR antenna Gong Fen community, then
P
1transmitting power-10log (N)+antenna gain-total losses of logic district in the frequency range of central area belonging to=described OTSR antenna Gong Fen community;
P
2transmitting power-10log (N)+antenna gain-total losses in logic district edge region frequency range belonging to=described OTSR antenna Gong Fen community;
Wherein, N equals the number of the radio-frequency antenna of the logic district belonging to described OTSR antenna Gong Fen community.
Further, if described in the interfered cell chosen comprise the OTSR antenna Gong Fen community that two or more belongs to same logic district, determine in step S30 that the step of descending total interference of described pixel comprises:
Travel through described interfered cell one by one, the Reference Signal Received Power dividing cell transmission signal to cover described pixel the OTSR antenna merit belonging to same logic district is multiplied by a commutation factor after being added, and then be added with other interfered cells Reference Signal Received Power covering described pixel that transmits, obtain descending total interference of described pixel, wherein, commutation factor < 1 described in 0 <.
With a specific embodiment, computational methods of the present invention are described in detail below, comprise step below:
Step 101: configure separately each RF antenna, needs the parameter of configuration to comprise: high and propagation model hung by antenna type, transmitting power, deflection, angle of declination, antenna.
Step 102: path loss calculation, the planning of PCI (Physical Cell Identifier) code, adjacent cell planning and frequency planning are carried out to community to be planned.
Suppose that a logic district A merit separates multiple antenna (A1/A2/...), its transmitting power sum is total transmitting power of this logic district A, simultaneously the frequency resource of sharing A and PCI code, but each merit divided antenna has respective Neighboring Cell List.
Step 103: the descending interference for a pixel Q is determined to comprise the following steps:
(1), suppose that the interfered cell list of a certain pixel Q of the main Serving cell (BestServer A1) of certain antenna A1 is descending for B, C, D, E, F1, F2 according to RSRP;
(2) travel through described interfered cell, one by one, can find out that adjacent area F is Gong Fen community from interfered cell list above, then when calculating Q interference need community F to be considered as two independent interfered cell F1, F2 and carry out sequence calculating.Because the transmitting power of F1, F2 reduces by half respectively, therefore corresponding RSRP value reduces, and F1, F2 become the weak jamming community of Q.Such as, suppose that the base station transmitting power originally of adjacent area F is 46dBm, merit divides the transmitting power of rear F1, F2 to be 46dBm-10log2=43dBm.Divide if certainly strong jamming community B or C is carried out merit, the situation after the interfered cell list ordering of Q also can divide according to merit changes;
Can choose interfered cell according to the RSRP threshold value, interfered cell number etc. preset, therefore part weak jamming community can be excluded outside the list of interfered cell after being divided by merit.
(3), judge that Q is positioned at IC (the Inter Cell of BestServer_A1, central area) or EC (Edge Cell, fringe region), calculate according to residing cell conditions the interference that Q is subject to, the interference that Q the is subject to frequency range used with IC and EC of coverage cell is relevant.
With the citing of the method for salary distribution of ICIC SFR (Soft Frequency Reuse, soft-frequency reuse), suppose that the frequency range of cell allocation is 2610MHz ~ 2620MHz, then according to the mode of SFR, frequency range is divided into three pieces, the method for salary distribution is as table 1:
Table 1
| Mode | F1：2610～2613.3 | F2：2613.3～2616.6 | F3：2616.6～2620 |
| One | EC | IC | IC |
| Two | IC | EC | IC |
| Three | IC | IC | EC |
A, when Q is positioned at the IC of BestServer_A1, suppose that BestServer_A1 adopts mode one, and interfered cell also adopts mode one, now the EC of EC and the BestServer_A1 of interfered cell is with frequently, then interfered cell to the interference of Q be interfered cell IC frequency range on to transmit the interference produced;
If interfered cell adopts mode two or mode three, then now the EC of EC and the BestServer_A1 of interfered cell is alien frequencies, so the interference of interfered cell to Q be exactly interfered cell IC frequency range on transmit produce interference 1/2 and interfered cell EC frequency range on transmit produce interference sum.
Therefore, when Q is positioned at the IC of BestServer_A1,
Calculating interfered cell transmits and covers the RSRP of Q in IC frequency range, represents with P1, and the EC of EC and the BestServer_A1 of this interfered cell is with frequently;
Calculating interfered cell transmits and covers the RSRP of Q in EC frequency range, represents, the EC alien frequencies of EC and the BestServer_A1 of this interfered cell with P2;
Calculating interfered cell transmits and covers the RSRP of Q in IC frequency range, represents, the EC alien frequencies of EC and the BestServer_A1 of this interfered cell with P3;
The then interference IC=P1+P2+P3*1/2 that is subject to of Q.
B, when Q is positioned at the EC of BestServer_A1, the frequency resource taken is 1/3 of whole frequency band, suppose that BestServer_A1 adopts mode one, and interfered cell also adopts mode one, then the interference that Q is subject to be interfered cell EC frequency range on to transmit the interference produced;
When interfered cell adopt mode two or mode three time, then the interference that Q is subject to be interfered cell IC frequency range on transmit produce interference 1/2.
Therefore, when Q is positioned at the EC of BestServer_A1,
Calculating interfered cell transmits and covers the RSRP of Q in EC frequency range, represents with P4, and the EC of EC and the BestServer_A1 of this interfered cell is with frequently;
Calculating interfered cell transmits and covers the RSRP of Q in IC frequency range, represents, the EC alien frequencies of EC and the BestServer_A1 of this interfered cell with P5;
The then interference EC=P4+P5*1/2 that is subject to of Q.
When calculating the interference of each pixel, can represent that the multiple merit divided antennas belonging to same logic district cover the RSRP of Q respectively with M1/M2/M3..., next need to judge the overlapping region of the merit divided antenna of Q present position whether in same logic district, if in overlapping region, the RSRP that multiple merit divided antenna covers Q is then needed to merge into C* (M1+M2+...), wherein C represents that Q drops on the commutation factor on certain clutter (type of ground objects), value is between (0,1); If not in overlapping region, then do not need to merge.According to previous step, effective interference of covering each pixel is added up, thus obtain descending total interference of each pixel.
Present invention also offers a kind of device determining descending interference, as shown in Figure 5, the application of installation of the present embodiment, in the system comprising theaomni-directional transmission directional reception (OTSR) base station, comprising: computing module, choose module and determination module, wherein,
Computing module, for the selected pixel to main Serving cell, calculates the Reference Signal Received Power that each cell transmission signal covers this selected pixel, and wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community;
Choose module, for choosing the interfered cell of described pixel from described each community;
Determination module, the interfered cell chosen for choosing module described in basis transmits and covers the RSRP of described pixel, determines descending total interference of described pixel.
Preferably, described computing module calculates a cell transmission signal and covers main Serving cell to select the mode of the Reference Signal Received Power M of pixel as follows:
When described pixel is positioned at the central area of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
1; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2+P
2;
When described pixel is positioned at the fringe region of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
2; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2,
Wherein, P
1for this community transmitting in the frequency range of central area covers the Reference Signal Received Power of described pixel, P
2for transmitting in this community edge region frequency range covers the Reference Signal Received Power of described pixel.
Wherein, if described community is OTSR antenna Gong Fen community, then
P
1transmitting power-10log (N)+antenna gain-total losses of logic district in the frequency range of central area belonging to=described OTSR antenna Gong Fen community;
P
2transmitting power-10log (N)+antenna gain-total losses in logic district edge region frequency range belonging to=described OTSR antenna Gong Fen community;
Wherein, N equals the number of the radio-frequency antenna of the logic district belonging to described OTSR antenna Gong Fen community.
In a preferred embodiment, choose module described in and at least comprise one of lower unit:
First chooses unit, is greater than the interfered cell of community as described pixel of predetermined threshold for choosing the Reference Signal Received Power that covers described pixel of transmitting; Or
Second chooses unit, and for choosing the interfered cell of R the highest community of the Reference Signal Received Power that covers described pixel of transmitting as described pixel, R is preset value, R >=1.
In a preferred embodiment, if described in the interfered cell chosen comprise the OTSR antenna Gong Fen community that two or more belongs to same logic district, then described determination module determines that descending total interference of described pixel is specially:
Travel through described interfered cell one by one, the Reference Signal Received Power dividing cell transmission signal to cover described pixel the OTSR antenna merit belonging to same logic district is multiplied by a commutation factor after being added, and then be added with other interfered cells Reference Signal Received Power covering described pixel that transmits, obtain descending total interference of described pixel, wherein, commutation factor < 1 described in 0 <.
To sum up, in the descending interference modeling of LTE, increase the community based on the configuration of OTSR site type, better can reflect the real network performance of LTE, computational methods provided by the invention and device, can network plan simulation precision be improved, and reduce the cost of later stage optimization.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
These are only the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. a descending interference defining method, be applied to the system comprising theaomni-directional transmission directional reception (OTSR) base station, the method comprises:
To the selected pixel of main Serving cell, calculate the Reference Signal Received Power that each cell transmission signal covers this selected pixel, wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community;
The interfered cell of described pixel is chosen from described each community;
Transmit according to the described interfered cell chosen and cover the Reference Signal Received Power of described pixel, determine descending total interference of described pixel;
Calculate a cell transmission signal to cover main Serving cell to select the mode of the Reference Signal Received Power M of pixel as follows:
When described pixel is positioned at the central area of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
1; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2+P
2;
When described pixel is positioned at the fringe region of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
2; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2,
Wherein, P
1for this community transmitting in the frequency range of central area covers the Reference Signal Received Power of described pixel, P
2for transmitting in this community edge region frequency range covers the Reference Signal Received Power of described pixel.
2. the method for claim 1, is characterized in that: the step choosing the interfered cell of described pixel from described community comprises:
The Reference Signal Received Power that choosing transmits covers described pixel is greater than the interfered cell of community as described pixel of predetermined threshold; Or
Choosing transmits covers the interfered cell of R the highest community of the Reference Signal Received Power of described pixel as described pixel, and R is preset value, R >=1.
3. the method for claim 1, is characterized in that: if described community is OTSR antenna Gong Fen community, then
P
1transmitting power-10log (N)+antenna gain-total losses of logic district in the frequency range of central area belonging to=described OTSR antenna Gong Fen community;
P
2transmitting power-10log (N)+antenna gain-total losses in logic district edge region frequency range belonging to=described OTSR antenna Gong Fen community;
Wherein, N equals the number of the radio-frequency antenna of the logic district belonging to described OTSR antenna Gong Fen community.
4. the method as described in claim 1 or 3, it is characterized in that: if described in the interfered cell chosen comprise the OTSR antenna Gong Fen community that two or more belongs to same logic district, the interfered cell chosen described in described basis transmits and covers the Reference Signal Received Power of described pixel, determines that the step of descending total interference of described pixel comprises:
Travel through described interfered cell one by one, the Reference Signal Received Power dividing cell transmission signal to cover described pixel the OTSR antenna merit belonging to same logic district is multiplied by a commutation factor after being added, and then be added with other interfered cells Reference Signal Received Power covering described pixel that transmits, obtain descending total interference of described pixel, wherein, commutation factor < 1 described in 0 <.
5. determine a device for descending interference, be applied to the system comprising theaomni-directional transmission directional reception (OTSR) base station, comprise:
Computing module, for the selected pixel to main Serving cell, calculates the Reference Signal Received Power that each cell transmission signal covers this selected pixel, and wherein, each OTSR antenna Gong Fen community under described OTSR base station calculates respectively as independent community;
Choose module, for choosing the interfered cell of described pixel from described each community;
Determination module, the interfered cell chosen for choosing module described in basis transmits and covers the Reference Signal Received Power of described pixel, determines descending total interference of described pixel;
Described computing module calculates a cell transmission signal and covers main Serving cell to select the mode of the Reference Signal Received Power M of pixel as follows:
When described pixel is positioned at the central area of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
1; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2+P
2;
When described pixel is positioned at the fringe region of described main Serving cell, as this community fringe region and as described in the fringe region of main Serving cell with frequently, then M=P
2; As this community fringe region and as described in the fringe region alien frequencies of main Serving cell, then M=P
1/ 2,
Wherein, P
1for this community transmitting in the frequency range of central area covers the Reference Signal Received Power of described pixel, P
2for transmitting in this community edge region frequency range covers the Reference Signal Received Power of described pixel.
6. device as claimed in claim 5, is characterized in that: described in choose module and at least comprise one of lower unit:
First chooses unit, is greater than the interfered cell of community as described pixel of predetermined threshold for choosing the Reference Signal Received Power that covers described pixel of transmitting; Or
Second chooses unit, and for choosing the interfered cell of R the highest community of the Reference Signal Received Power that covers described pixel of transmitting as described pixel, R is preset value, R >=1.
7. device as claimed in claim 5, is characterized in that: if described community is OTSR antenna Gong Fen community, then
P
1transmitting power-10log (N)+antenna gain-total losses of logic district in the frequency range of central area belonging to=described OTSR antenna Gong Fen community;
P
2transmitting power-10log (N)+antenna gain-total losses in logic district edge region frequency range belonging to=described OTSR antenna Gong Fen community;
Wherein, N equals the number of the radio-frequency antenna of the logic district belonging to described OTSR antenna Gong Fen community.
8. the device as described in claim 5 or 7, it is characterized in that: if described in the interfered cell chosen comprise the OTSR antenna Gong Fen community that two or more belongs to same logic district, then described determination module determines that descending total interference of described pixel is specially:
Travel through described interfered cell one by one, the Reference Signal Received Power dividing cell transmission signal to cover described pixel the OTSR antenna merit belonging to same logic district is multiplied by a commutation factor after being added, and then be added with other interfered cells Reference Signal Received Power covering described pixel that transmits, obtain descending total interference of described pixel, wherein, commutation factor < 1 described in 0 <.
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| WO2010022556A1 (en) * | 2008-08-27 | 2010-03-04 | 中兴通讯股份有限公司 | Method for processing downlink signal in sector portion and base station thereof |
| CN101904126A (en) * | 2007-12-21 | 2010-12-01 | 爱立信电话股份有限公司 | Scrambling code allocation in a cellular communication network |
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| CN101904126A (en) * | 2007-12-21 | 2010-12-01 | 爱立信电话股份有限公司 | Scrambling code allocation in a cellular communication network |
| WO2010022556A1 (en) * | 2008-08-27 | 2010-03-04 | 中兴通讯股份有限公司 | Method for processing downlink signal in sector portion and base station thereof |
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