CN106535205B - Frequency re-ploughing cell setting method and system - Google Patents
Frequency re-ploughing cell setting method and system Download PDFInfo
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- CN106535205B CN106535205B CN201510584054.1A CN201510584054A CN106535205B CN 106535205 B CN106535205 B CN 106535205B CN 201510584054 A CN201510584054 A CN 201510584054A CN 106535205 B CN106535205 B CN 106535205B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a frequency replating cell setting method, which comprises the following steps: acquiring equipment design parameters of the frequency replating cell and the tested service cell; respectively acquiring measurement report MR data of original standard base stations of the frequency replating cell and the tested service cell at a plurality of randomly selected sampling points; for each sampling point, judging whether the tested service cell generates obvious co-channel interference on the frequency replating cell one by one according to the MR data and the equipment design parameters; and when the number of the sampling points generating obvious co-channel interference exceeds a preset threshold value, setting the tested service cell as a space isolation zone cell of the frequency replating cell. The invention also discloses a frequency replating cell setting system.
Description
Technical Field
The invention relates to the technical field of wireless communication network planning, in particular to a method and a system for setting a frequency replating cell.
Background
With the development of wireless technology, the allocation of available frequency spectrum is more tense due to the appearance of new communication systems, and more operators replans the frequency originally occupied by the system with lower frequency spectrum efficiency and apply the frequency to the system with higher frequency spectrum efficiency. In the process of frequency replanning, because a new system and an old system coexist, co-channel interference is likely to occur in a communication network, and therefore, a space isolation band needs to be properly arranged in the communication network so as to provide sufficient isolation protection between the new area and the old area with serious co-channel interference.
Since the spatial isolation zone is usually determined before or at least at the same time as the new cell is constructed, the presence or absence of co-channel interference and the installation range of the spatial isolation zone cannot be determined by field testing. At present, the setting of the existing space isolation belt mainly depends on simulation or engineering experience, subjective factors have large influence, an explicit and feasible objective setting principle is not available temporarily, the matching degree of a setting result and the actual condition of a system is difficult to accurately control, once deviation occurs, the network quality of the system is seriously influenced, the user experience is reduced, and the system needs to be improved/maintained at great cost; in the scene where the electronic map is lacked or the terrain is complex, the effectiveness of the existing setting method is further reduced.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present invention provide a method and a system for setting a frequency replating cell, so as to objectively and accurately determine the co-channel interference situation, reasonably set a spatial isolation zone, and improve the construction efficiency of system frequency replating.
The technical scheme of the embodiment of the invention is realized as follows:
in an aspect of an embodiment of the present invention, there is provided a frequency replating cell setting method, including:
acquiring equipment design parameters of the frequency replating cell and the tested service cell;
respectively acquiring measurement report MR data of the original standard base station of the frequency replating cell and/or the tested service cell at a plurality of randomly selected sampling points;
for each sampling point, judging whether the tested service cell generates obvious co-channel interference on the frequency replating cell one by one according to the MR data and the equipment design parameters;
and when the number of the sampling points generating obvious co-channel interference exceeds a preset threshold value, setting the tested service cell as a space isolation zone cell of the frequency replating cell.
Preferably, the co-channel interference includes: and the interference of the original standard base station of the tested service cell to the new standard base station of the frequency replating cell, the interference of the new standard base station of the frequency replating cell to the original standard base station of the tested service cell and the interference of the new standard base station of the frequency replating cell to the original standard base station of the tested service cell.
Preferably, acquiring the MR data comprises:
acquiring a signal level value provided by an original standard base station of the frequency replating cell at the sampling point on site;
and/or the presence of a gas in the gas,
and acquiring the signal level value provided by the original standard base station of the tested serving cell at the sampling point on site.
Preferably, in the method, the setting when the number of the sampling points exceeds a preset threshold value includes:
when the proportion of the number of sampling points which can generate obvious co-channel interference in the serving cell to the total number of sampling points which can generate influence by the serving cell exceeds a first threshold value,
and/or the presence of a gas in the gas,
when the proportion of the number of sampling points which can generate obvious co-channel interference in the serving cell to all the sampling points exceeds a second threshold value,
and setting the measured serving cell as a space isolation zone cell of the frequency replating cell.
Preferably, in the method, the setting when the number of the sampling points exceeds a preset threshold value includes:
and when the number of sampling points which can generate obvious co-channel interference in the measured service cell exceeds a third threshold value, setting the measured service cell as a space isolation zone cell of the frequency replating cell.
In another aspect of the embodiments of the present invention, there is also provided a frequency replating cell setting system, including:
the parameter acquisition module is used for acquiring the equipment design parameters of the frequency replating cell and the tested service cell;
the acquisition module is used for respectively acquiring measurement report MR data of the original standard base station of the frequency replating cell and/or the tested service cell at a plurality of randomly selected sampling points;
the interference judging module is used for judging whether the tested service cell generates obvious co-channel interference on the frequency replating cell one by one according to the MR data and the equipment design parameters for each sampling point;
and the cell setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replanning cell when the number of the sampling points generating the obvious co-channel interference exceeds a preset threshold value.
Preferably, the interference determination module includes at least one of a first direction interference determination module, a second direction interference determination module, a third direction interference determination module and a fourth direction interference determination module; wherein the content of the first and second substances,
the first direction interference judging module is used for judging the interference of the original standard base station of the tested service cell to the new standard terminal of the frequency replating cell;
the second direction interference judging module is used for judging the interference of the original standard terminal of the tested service cell to the new standard base station of the frequency replating cell;
the third direction interference judging module is used for judging the interference of the new type base station of the frequency replating cell to the original type terminal of the tested service cell;
and the fourth direction interference judging module is used for judging the interference of the newly-made terminal of the frequency replating cell to the original-type base station of the tested service cell.
Preferably, the acquisition module comprises:
the first signal acquisition module is used for acquiring a signal level value provided by an original standard base station of the frequency replanning cell at the sampling point on site;
and/or the presence of a gas in the gas,
and the second signal acquisition module is used for acquiring the signal level value provided by the original standard base station of the tested serving cell at the sampling point on site.
Preferably, the cell setting module includes:
the first setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the proportion of the number of sampling points which can generate obvious co-frequency interference in the tested service cell to the total number of sampling points which are influenced by the tested service cell exceeds a first threshold value;
and/or the presence of a gas in the gas,
and the second setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the proportion of the number of sampling points which can generate obvious co-frequency interference in the tested service cell to all the sampling points exceeds a second threshold value.
Preferably, the cell setting module includes:
and the third setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the number of sampling points which can generate obvious co-channel interference in the tested service cell exceeds a third threshold value.
According to the frequency replating cell setting method and system provided by the embodiment of the invention, the MR data information of original standard equipment is acquired in the existing network, and the co-channel interference degree is objectively and accurately judged, so that the cell needing to be set into a space isolation zone can be definitely indicated; the technical scheme of the embodiment of the invention has high reliability, is real, efficient and easy to implement, greatly simplifies the network planning process of the space isolation zone area when the frequency replating cell is arranged, and improves the construction efficiency of the frequency replating of the communication network.
Drawings
Fig. 1 is a flow chart illustrating a method for setting a frequency replating cell according to an embodiment of the present invention;
FIG. 2 is a diagram of an exemplary co-channel interference pattern in an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating MR data collected when the co-channel interference degree generated by the original standard base station of the serving cell to be tested is determined in the embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating MR data collected when the co-channel interference degree generated by the original standard terminal of the serving cell to be tested is determined in the embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating MR data collected when the co-channel interference level generated by the newly-built base station of the frequency replating cell is determined according to the embodiment of the present invention;
fig. 6 is a schematic diagram illustrating MR data collected when it is determined that a newly-manufactured terminal in a frequency replating cell generates co-channel interference in the embodiment of the present invention;
fig. 7 is a schematic block diagram of a frequency replating cell setting system according to an embodiment of the present invention.
Detailed Description
Firstly, a phenomenon of co-channel interference is explained, and because the original system is still used, the construction of a new system cell with frequency replanting is often formed by adding a new system base station on the basis of the original system cell, and the frequency replanting can only be carried out according to the load and the frequency use condition of the original system base station, so that the actually available bandwidth or central frequency point of each cell cannot be consistent, the same frequency band may be respectively occupied by the new system base station and the original system base station of two adjacent cells, a terminal can receive two different system signals with the same frequency in the common influence range of the two cells, and the co-channel signals which do not belong to the current working system of the terminal can interfere the normal work of the terminal. Under the condition of serious co-frequency interference, in order to ensure the normal work of the terminal, a service cell which seriously interferes with a frequency replating cell needs to be set as a space isolation zone for isolation protection.
In an actual situation, since the spatial isolation zone is usually determined before the frequency replating cell is constructed, and at this time, a newly-manufactured base station and a newly-manufactured terminal do not exist, the co-channel interference degree cannot be actually measured when the spatial isolation zone is set, and the frequency replating cell and the corresponding spatial isolation zone can only be set by relying on subjective simulation or engineering experience in the prior art.
The embodiment of the invention determines the actual co-channel interference degree through the Measurement Report (MR) data of the original system acquired by the existing network, thereby determining the setting range of the space isolation zone and realizing the objective and accurate setting of the frequency replating cell. As shown in fig. 1, the method for setting a frequency replating cell according to the embodiment of the present invention includes:
s1: acquiring equipment design parameters of the frequency replating cell and the tested service cell;
s2: respectively acquiring MR data of original standard base stations of the frequency replanning cell and the tested service cell at a plurality of randomly selected sampling points;
s3: for each sampling point, judging whether the tested service cell generates obvious co-channel interference on the frequency replating cell one by one according to the MR data and the equipment design parameters;
s4: and when the number of the sampling points generating obvious co-channel interference exceeds a preset threshold value, setting the tested service cell as a space isolation zone cell of the frequency replating cell.
Further, as shown in fig. 2, it is assumed that the frequency replating cell 1 is already constructed and no spatial isolation zone is set, the measured serving cell 2 is a serving cell adjacent to the frequency replating cell 1, and the same frequency interference only exists between base stations and terminals of different systems in different cells because the construction of the original system is mature. For simplicity of analysis, at least the following devices are present in the communication network environment shown in fig. 2: new-type base station NB1 of frequency replating cell 1newNew-type terminal UE1 belonging to frequency replating cell 1newOriginal standard base station NB2 of serving cell 2 to be testedlegacyOriginal standard terminal UE2 belonging to tested service cell 2legacy。
In the example of fig. 2, co-channel interference may exist in four directions: original standard base station NB2 of tested serving celllegacyNew type terminal UE1 for frequency replating cellnewInterference and frequency re-cultivation cell new-type terminal UE1newFor the original standard base station NB2 of the tested service celllegacyInterference of (2), frequency re-cultivation of newly-built cell base station NB1newFor the original standard terminal UE2 of the tested service celllegacyInterference and original standard terminal UE2 of tested service celllegacyNew-type base station NB1 for frequency replating cellnewThe interference of (2). Those skilled in the art can understand that there may be a plurality of measured serving cells adjacent to the frequency replating cell, or there may be a new type of device in some of the measured serving cells, which may be interfered by the original type of device in the frequency replating cell, but each measured serving cell may be processed in the manner of the embodiment of the present invention, and the situation of reverse interference may be processed in the manner of the embodiment of the present invention only by exchanging the positions of the frequency replating cell and the measured serving cell, so the example of fig. 2 is not a one-by-one analysis description of all the interference situations.
Fig. 2 is a schematic diagram of an interference principle, and in practical cases, the co-channel interference in the four directions cannot be measured in advance, so that the preferred embodiment of the present invention further provides a technical solution for objectively determining the co-channel interference degree in each direction. The method specifically comprises the following aspects:
first, original standard base station NB2legacyFor newly-made terminal UE1newInterference of (2):
if a new type of terminal UE1 is to be guaranteednewThe new type of terminal UE1 is usually required to have normal operation performancenewThe Signal to Interference plus Noise Ratio (SINR) at the current sampling point is not less than a certain threshold, i.e., the SINR
SINR1new＝R1new-I1new≥SINR1new，Thd (1)；
Wherein, SINR1newIs the newly-made terminal UE1newSignal to interference plus noise ratio at the current sampling point, which is re-tilled by frequency to new cell type base station NB1newAt the current sampling point is the new formed terminal UE1newThe provided signal level value R1newAnd the original standard base station NB2 of the tested serving celllegacyFor the new formed terminal UE1 at the current sampling pointnewThe generated interference level value I1newDetermination, SINR1new，ThdTo ensure new form of terminal UE1newNormal operating signal and interference plusA noise ratio threshold. SINR1new，ThdIs a predetermined index, R1newAnd I1newAs not actually measurable, the preferred embodiment of the present invention further utilizes MR data for objective determination of R1newAnd I1new。
Specifically, as the construction of the original-standard devices of the two cells is mature, the relevant MR data of the original-standard devices at the current sampling point can be collected on site, as shown in fig. 3, the MR data to be collected for determining the co-channel interference degree in the first direction includes: frequency replating cell original standard base station NB1legacyThe original standard terminal UE1 belonging to the frequency replating cell at the current sampling pointlegacyThe provided signal level value R1legacyAnd the original standard base station NB2 of the serving cell to be testedlegacyThe signal level value R2 provided at the current sampling pointlegacy. In practical systems, the useful signal and the interference signal only differ in whether the signal is the signal currently used by the terminal, and a signal of the same source is a useful signal when used by the terminal and is an interference signal when not used by the terminal, so that here R2legacyThe actual base station is the original standard NB2 of the serving cell to be testedlegacyTo original standard terminal UE1legacyThe resulting interference level value.
And because the equipment design parameters of the two cells can be obtained from the operator system, new standard data can be converted in a proper mode. Wherein, assuming that the original and new base stations in the frequency re-cultivation cell share the antenna feed and the antenna gain is the same, the new base station NB1newAnd the original standard base station NB1legacyThe difference value of the signal intensity at the current sampling point is the difference D of the transmitting power of the two base stations1The following can be obtained: r1new＝R1legacy-D1。
In addition, the original standard base station NB2 of the serving cell to be testedlegacyThe transmission power, the transmission bandwidth and the signal bandwidth of the new-type terminal belong to design parameters, and the signal level value D of the transmission power on the signal bandwidth can be converted according to the bandwidth proportion2(actually the interference level value), we can obtain: i1new＝R2legacy-D2；
The above decision formula (1) may be converted into:
SINR1new＝R1new-I1new＝R1legacy-D1-(R2legacy-D2)≥SINR1new，Thd；
namely R1legacy-R2legacy≥SINR1new,Thd+D1-D2＝T1 (2)。
Wherein, R1legacyAnd R2legacyFor MR data acquired in situ, T1(i.e., SINR1new，Thd+D1-D2) Can be determined by design parameters, and the real data can objectively determine the original standard base station NB2legacyFor newly-made terminal UE1newThat is, when the above-mentioned decision formula (2) at the current sampling point cannot be satisfied, the measured serving cell will generate significant co-channel interference to the downlink data of the frequency replating cell.
Second, original standard terminal UE2legacyFor new type base station NB1newInterference of (2):
because the uplink signal-to-noise ratio is influenced by various factors such as network load and the like, the original standard terminal UE2 is difficult to obtain through uplink informationlegacyFor new type base station NB1newThe interference level is thus quantified in this direction by the uplink background rise.
In theory, the original standard terminal UE2legacyTransmitted power T2legacy,tSuppose a new standard base station NB1newNoise floor value of N per unit receiving bandwidth1(dBm) with an acceptable sensitivity drop value of A1(dB), the acceptable interference signal strength is to satisfy the index, and the original standard terminal UE2legacyTo new built base station NB1newIsolation (i.e. path loss) PL provided in direction1Should not be less than
But original standard terminal UE2legacyThe uplink path loss of the present invention cannot be actually measured, and the embodiment of the present invention determines the path loss in the downlink direction. According to design parameters, original systemBase station NB1legacyTransmitting power of T1legacy,bAs shown in fig. 4, the original standard base station NB1 receivable at the current sampling point is collected in the fieldlegacyThe generated downstream signal level value R1legacyThen the isolation (i.e., path loss) requirement becomes:
namely, it is
Wherein, R1legacyFor MR data acquired in situ, T2Can be determined by design parameters, and the real data can objectively determine the original standard terminal UE2legacyFor new type base station NB1newThat is, when the above-mentioned decision formula (3) cannot be satisfied at the current sampling point, the measured serving cell will generate significant co-channel interference to the uplink data of the frequency replating cell.
Third, new type base station NB1newTo original standard terminal UE2legacyInterference of (2):
if the original system is guaranteed, the terminal UE2legacyThe normal working performance usually requires the original system terminal UE2legacyThe signal to interference plus noise ratio at the current sampling point is not less than a certain threshold, i.e.
SINR2legacy＝R2legacy-I2legacy≥SINR2legacy,Thd (4)；
Wherein, SINR2legacyFor the original terminal UE2legacyThe signal-to-interference-plus-noise ratio at the current sampling point, which is determined by the original standard base station NB2 of the serving cell under testlegacyAt the current sampling point, the original standard terminal UE2legacyThe provided signal level value R2legacyAnd frequency re-ploughing cell new type base station NB1newThe original standard terminal UE2 is processed at the current sampling pointlegacyThe generated interference level value I2legacyDetermination, SINR2legacy，ThdTo ensure the original standard terminalUE2legacyA signal to interference plus noise ratio threshold for normal operation. SINR2legacy，ThdIs a predetermined index, I2legacyAs not actually measurable, the preferred embodiment of the present invention further utilizes the MR data for objective determination of I2legacy。
Specifically, as the construction of the original-standard devices of the two cells is mature, the relevant MR data of the original-standard devices at the current sampling point can be collected on site, as shown in fig. 5, the MR data to be collected for determining the co-channel interference degree in the direction includes: frequency replating cell original standard base station NB1legacyAt the current sampling point, the original standard type terminal UE2 belonging to the tested service celllegacyThe provided signal level value R1legacy(actually, interference level value) and original base station NB2 of serving cell under testlegacyThe original standard terminal UE2 is processed at the current sampling pointlegacyThe provided signal level value R2legacy。
The equipment design parameters of the two cells can be obtained from an operator system, and new standard data can be converted in a proper mode. Wherein, assuming that the original and new base stations in the frequency re-cultivation cell share the antenna feed and the antenna gain is the same, the new base station NB1newAnd the original standard base station NB1legacyThe difference value of the signal intensity (actually, the interference intensity) at the current sampling point is the difference D between the transmitting powers of the two base stations1The following can be obtained: i2legacy＝R1legacy-D1。
The above decision equation (4) can be converted into: SINR2legacy＝R2legacy-I2legacy＝R2legacy-(R1legacy-D1)≥SINR2legacy，Thd；
Namely R2legacy-R1legacy≥SINR2legacy，Thd+D1＝T3 (5)。
Wherein, R2legacyAnd R1legacyFor MR data acquired in situ, T3Can be determined by design parameters, and the real data can objectively determine the new standard base station NB1newTo original standard terminal UE2legacyI.e. the above-mentioned decision at the current sampling pointWhen the formula (5) cannot be satisfied, the frequency replating cell will generate obvious same frequency interference to the downlink data of the measured serving cell.
Fourth, new-type terminal UE1newFor original standard base station NB2legacyInterference of (2):
because the uplink signal-to-noise ratio is influenced by various factors such as network load and the like, the new-type terminal UE1 is difficult to obtain through uplink informationnewFor original standard base station NB2legacyThe interference level is thus quantified in this direction by the uplink background rise.
Theoretically, the new terminal UE1newTransmitted power T1new,tSuppose that the original standard base station NB2legacyNoise floor value of N per unit receiving bandwidth2(dBm) with an acceptable sensitivity drop value of A2(dB), then the acceptable interference signal strength is to meet the criteria, new type terminal UE1newTo original standard base station NB2legacyIsolation (i.e. path loss) PL provided in direction2Should not be less than
However, a new type of terminal UE1 is made before constructionnewThe path loss of the invention can not be actually measured, and the embodiment of the invention determines the path loss through the downlink direction. According to design parameters, the original standard base station NB2legacyTransmitting power of T2legacy,bAs shown in fig. 6, the original standard base station NB2 receivable at the current sampling point is collected in the fieldlegacyProvided downstream signal level value R2legacyThen the isolation (i.e., path loss) requirement becomes:
namely, it is
Wherein, R2legacyFor MR data acquired in situ, T4Can be determined by design parameters, these realitiesData can objectively determine new type of terminal UE1newFor original standard base station NB2legacyThat is, when the above-mentioned decision formula (6) cannot be satisfied at the current sampling point, the frequency replating cell will generate significant co-channel interference to the uplink data of the measured serving cell.
From the above analysis, it can be known that whether obvious co-frequency interference is generated in each direction can be objectively and accurately determined at each sampling point by only collecting signal level values provided by the original standard base station of the frequency replating cell and the measured service cell at each sampling point and combining the equipment design parameters (including the transmission power of each base station, the transmission power of each terminal, the transmission bandwidth of each base station, the signal bandwidth of each terminal, the signal indexes of each equipment and the like) of the two cells.
The measured serving cell can be regarded as an interference cell no matter obvious co-channel interference is generated in any direction, but all the interference cells are not required to be set as space isolation zone cells of the frequency replating cells in order to reduce construction cost and complexity. In the preferred embodiment of the present invention, it is further determined whether the interfering cell needs to be set as a spatial isolation zone cell according to the number or the proportion of sampling points that will generate significant co-channel interference.
Specifically, in a preferred embodiment of the present invention, for a certain measured serving cell, if the ratio of the number of sampling points that will generate significant co-channel interference to the number of all sampling points that will generate significant co-channel interference exceeds a first threshold, and/or the ratio of the number of sampling points that will generate significant co-channel interference to the number of all sampling points exceeds a second threshold, it is determined that the measured serving cell is set as a spatial isolation zone cell of a frequency replating cell. In another preferred embodiment of the present invention, if the number of sampling points that will generate significant co-channel interference for a certain measured serving cell exceeds a third threshold, a spatial isolation zone cell that sets the measured serving cell as a frequency replating cell is determined. The first threshold, the second threshold and/or the third threshold are preset indexes during planning of the frequency replating cell, and each index is comprehensively evaluated and set according to factors such as communication network construction cost, network service quality requirements, the number of cell users, main user types and the like.
The embodiment of the invention can be used for replating GSM frequency to LTE FDD, CDMA to LTE FDD, GSM to WCDMA, WCDMA to LTE FDD and other scenes. In practical application, the original-system base station has a large influence on the new-system terminal and the original-system terminal, for example, when the GSM frequency is replanted to the LTE FDD, the GSM base station has a large influence on the LTE FDD terminal and the LTE FDD base station. Therefore, the following description focuses on the sampling analysis in these two directions through specific application scenarios. Scene 1, interference of a GSM base station to an LTE FDD terminal:
to ensure the performance of the LTE FDD terminals, the signal-to-noise ratio of the LTE FDD terminals in the frequency replating cell 1 may be required to be greater than-3 dB, that is:
SINR1LTE＝R1LTE-I1LTE≥-3dB。
assuming that the LTE and GSM base stations in the frequency replating cell 1 share the same antenna feed and the antenna gains are the same, the difference between the LTE FDD and GSM signal strengths is the difference between the transmitting powers of the two systems. Assuming that the GSM base station in the frequency replating cell 1 transmits at a single carrier frequency with 20W (43dBm) power, the LTE FDD reference signal power is 15dBm, and if the GSM base station in the frequency replating cell 1 provides a signal level value of R1 in the original system MR data acquired by the frequency replating cell 1GSMThen the signal level value provided by the LTE FDD base station of the same sampling point frequency replating cell 1 will be R1LTE＝R1GSM-(43-15)＝R1GSM-28。
For the measured serving cell 2, if the signal level value provided by its GSM base station at the sampling point is R2GSM(actually, the interference level value generated by the LTE FDD terminal in the frequency replating cell 1), the GSM base station 20W power of the measured serving cell 2 is distributed on the 200KHz bandwidth, and the interference to the reference signal (15KHz) of the LTE FDD terminal is
Therefore, if the signal-to-noise ratio index needs to be satisfied, R1GSMAnd R2GSMThe following inequalities should be satisfied:
R1GSM-R2GSM≥-3+28-12＝13。
that is, the measured serving cell that does not satisfy the above conditions will generate obvious co-channel interference to the downlink data of the frequency replating cell. And then determining whether the tested service cell is set as a space isolation zone cell or not according to the number and/or the proportion of the sampling points generating the same frequency interference.
Scene 2, interference of the GSM terminal to the LTE FDD base station:
assuming a background noise value of-113 (dBm) per unit reception bandwidth for LTE FDD base stations of frequency replating cell 1 and an acceptable sensitivity drop of 0.8dB, the acceptable interference signal strength is-124.9 dB. Then, according to the transmitting power of the GSM terminal of the measured serving cell 2 being 33dBm, the isolation (path loss) to be provided in this direction should be not less than 157.9 dBm. The GSM base station transmitting power of the frequency replating cell 1 is 43dBm, and the level value R1 of the downlink signal generated by the GSM base station transmitting power is collected on siteGSMThen the isolation (path loss) requirement becomes:
R1GSM≤43-33-124.9＝-114.9dBm。
that is, the measured serving cell that does not satisfy the above conditions will generate obvious co-channel interference to the downlink data of the frequency replating cell. And then determining whether the tested service cell is set as a space isolation zone cell or not according to the number and/or the proportion of the sampling points generating the same frequency interference.
After determining that the cell is set as a spatial isolation zone, the corresponding cell needs to perform frequency-scrambling, and the frequency-scrambling principle generally is as follows: determining the same frequency band occupied by equipment of different systems in a cell of a space isolation zone according to the frequency division of a frequency replating cell, and clearing the frequency of the same frequency band and then leaving the same frequency band unused or deploying the same frequency band to the equipment of the same system of the frequency replating cell for use. In practical application, frequency replanting cells may exist on both sides of a cell of a spatial isolation zone, and the rising frequency band is determined comprehensively according to the conditions of the frequency replanting cells on both sides by adopting the principle, and specific rising frequency measures belong to the prior art and are not described herein.
As shown in fig. 7, an embodiment of the present invention also provides a frequency replating cell setting system 7, including:
a parameter obtaining module 701, configured to obtain device design parameters of the frequency replating cell and the measured serving cell;
an acquisition module 702, configured to acquire MR data of the original-standard base station of the frequency replating cell and the measured serving cell at a plurality of randomly selected sampling points, respectively;
an interference determination module 703, configured to determine, for each sampling point, one by one, according to the MR data and the device design parameter, whether the measured serving cell generates significant co-channel interference on the frequency replating cell;
a cell setting module 704, configured to set the serving cell to be tested as a spatial isolation zone cell of the frequency replating cell when the number of the sampling points generating significant co-channel interference exceeds a preset threshold.
Preferably, the interference determination module includes at least one of a first direction interference determination module, a second direction interference determination module, a third direction interference determination module and a fourth direction interference determination module; wherein the content of the first and second substances,
the first direction interference judging module is used for judging the interference of the original standard base station of the tested service cell to the new standard terminal of the frequency replating cell;
the second direction interference judging module is used for judging the interference of the original standard terminal of the tested service cell to the new standard base station of the frequency replating cell;
the third direction interference judging module is used for judging the interference of the new type base station of the frequency replating cell to the original type terminal of the tested service cell;
and the fourth direction interference judging module is used for judging the interference of the newly-made terminal of the frequency replating cell to the original-type base station of the tested service cell.
In the embodiment of the present invention, two types of MR data are mainly acquired, so the acquisition module includes:
the first signal acquisition module is used for acquiring a signal level value provided by an original standard base station of the frequency replanning cell at the sampling point on site;
and/or the presence of a gas in the gas,
and the second signal acquisition module is used for acquiring the signal level value provided by the original standard base station of the tested serving cell at the sampling point on site.
In the preferred embodiment of the present invention, it is determined whether to set a spatial isolation zone cell according to the ratio of interference sampling points, and then preferably, the cell setting module includes:
the first setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the proportion of the number of sampling points which can generate obvious co-frequency interference in the tested service cell to the total number of sampling points which are influenced by the tested service cell exceeds a first threshold value;
and/or the presence of a gas in the gas,
and the second setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the proportion of the number of sampling points which can generate obvious co-frequency interference in the tested service cell to all the sampling points exceeds a second threshold value.
In another preferred embodiment of the present invention, it is directly determined whether to set a spatial isolation zone cell according to the number of interference sampling points, and then preferably, the cell setting module includes:
and the third setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the number of sampling points which can generate obvious co-channel interference in the tested service cell exceeds a third threshold value.
Preferably, the frequency replating cell setting system may be implemented by a stand-alone device, such as a mobile terminal or a stand-alone functional unit loaded by the mobile terminal; or may be implemented by a plurality of different devices, for example, the acquisition module is an independent mobile/fixed device, and the other modules are implemented by a background terminal, a processing device and/or a server. In practical applications, each module (including but not limited to a parameter obtaining module, an interference determination module, a cell setting module, a first direction interference determination module, a second direction interference determination module, a third direction interference determination module, a fourth direction interference determination module, a first setting module, a second setting module, a third setting module, etc.) in the system may be implemented by a Central Processing Unit (CPU), a microprocessor Unit (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like, which are located in the system device. The acquisition module, the first signal acquisition module, the second signal acquisition module and the like are realized by corresponding signal acquisition sensors, signal acquisition units or signal acquisition equipment and the like.
The embodiment of the invention provides a frequency replating cell setting method and a frequency replating cell setting system, which can objectively and accurately judge the co-channel interference degree through the information which can be acquired by the existing network, thereby definitely indicating the cell which needs to be set into a space isolation zone.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for frequency re-cultivation cell placement, the method comprising:
acquiring equipment design parameters of the frequency replating cell and the tested service cell;
respectively acquiring measurement report MR data of the original standard base station of the frequency replating cell and/or the tested service cell at a plurality of randomly selected sampling points;
for each sampling point, judging whether the tested service cell generates obvious co-channel interference on the frequency replating cell one by one according to the MR data and the equipment design parameters;
and when the number of the sampling points generating obvious co-channel interference exceeds a preset threshold value, setting the tested service cell as a space isolation zone cell of the frequency replating cell.
2. The method of claim 1, wherein the co-channel interference comprises: and the interference of the original standard base station of the tested service cell to the new standard base station of the frequency replating cell, the interference of the new standard base station of the frequency replating cell to the original standard base station of the tested service cell and the interference of the new standard base station of the frequency replating cell to the original standard base station of the tested service cell.
3. The method of claim 1, wherein acquiring the MR data comprises:
acquiring a signal level value provided by an original standard base station of the frequency replating cell at the sampling point on site;
and/or the presence of a gas in the gas,
and acquiring the signal level value provided by the original standard base station of the tested serving cell at the sampling point on site.
4. The method of claim 1, wherein the setting of the number of sampling points exceeding a preset threshold comprises:
when the proportion of the number of sampling points which can generate obvious co-channel interference in the serving cell to the total number of sampling points which can generate influence by the serving cell exceeds a first threshold value,
and/or the presence of a gas in the gas,
when the proportion of the number of sampling points which can generate obvious co-channel interference in the serving cell to all the sampling points exceeds a second threshold value,
and setting the measured serving cell as a space isolation zone cell of the frequency replating cell.
5. The method of claim 4, wherein the setting of the number of sampling points exceeding the preset threshold comprises:
and when the number of sampling points which can generate obvious co-channel interference in the measured service cell exceeds a third threshold value, setting the measured service cell as a space isolation zone cell of the frequency replating cell.
6. A frequency replating cell placement system, comprising:
the parameter acquisition module is used for acquiring the equipment design parameters of the frequency replating cell and the tested service cell;
the acquisition module is used for respectively acquiring measurement report MR data of the original standard base station of the frequency replating cell and/or the tested service cell at a plurality of randomly selected sampling points;
the interference judging module is used for judging whether the tested service cell generates obvious co-channel interference on the frequency replating cell one by one according to the MR data and the equipment design parameters for each sampling point;
and the cell setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replanning cell when the number of the sampling points generating the obvious co-channel interference exceeds a preset threshold value.
7. The system of claim 6, wherein the interference decision module comprises at least one of a first directional interference decision module, a second directional interference decision module, a third directional interference decision module, and a fourth directional interference decision module; wherein the content of the first and second substances,
the first direction interference judging module is used for judging the interference of the original standard base station of the tested service cell to the new standard terminal of the frequency replating cell;
the second direction interference judging module is used for judging the interference of the original standard terminal of the tested service cell to the new standard base station of the frequency replating cell;
the third direction interference judging module is used for judging the interference of the new type base station of the frequency replating cell to the original type terminal of the tested service cell;
and the fourth direction interference judging module is used for judging the interference of the newly-made terminal of the frequency replating cell to the original-type base station of the tested service cell.
8. The system of claim 6, wherein the acquisition module comprises:
the first signal acquisition module is used for acquiring a signal level value provided by an original standard base station of the frequency replanning cell at the sampling point on site;
and/or the presence of a gas in the gas,
and the second signal acquisition module is used for acquiring the signal level value provided by the original standard base station of the tested serving cell at the sampling point on site.
9. The system of claim 6, wherein the cell setting module comprises:
the first setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the proportion of the number of sampling points which can generate obvious co-frequency interference in the tested service cell to the total number of sampling points which are influenced by the tested service cell exceeds a first threshold value;
and/or the presence of a gas in the gas,
and the second setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the proportion of the number of sampling points which can generate obvious co-frequency interference in the tested service cell to all the sampling points exceeds a second threshold value.
10. The system of claim 6, wherein the cell setting module comprises:
and the third setting module is used for setting the tested service cell as a space isolation zone cell of the frequency replating cell when the number of sampling points which can generate obvious co-channel interference in the tested service cell exceeds a third threshold value.
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| CN107277843B (en) * | 2017-07-31 | 2020-04-17 | 珠海市魅族科技有限公司 | Wireless communication method, device, terminal and computer readable storage medium |
| CN113923671B (en) * | 2020-07-07 | 2024-05-07 | 中国移动通信集团重庆有限公司 | Frequency resetting method, device, equipment and storage medium |
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