CN108243448B - Method and device for determining interference strength in cell system - Google Patents
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Abstract
The invention provides a method and a device for determining the interference strength in a cell system, wherein the method comprises the following steps: after one or more first measurement reports that the target cell is a neighboring cell are screened out and reported by one or more terminals at a preset time point, the interference strength of each terminal reaching the target cell as an interference source is obtained according to the reference signal receiving power of the target cell and the transmitting power margin of the terminal in the first measurement reports, and the interference strength of uplink signals of the one or more terminals on the target cell is obtained. Therefore, by calculating the interference intensity in the cell system, the invention can obtain the average value of PRB-level interference noise, also can obtain the interference intensity on the whole physical uplink shared channel PUSCH, can reflect the interference situation of a plurality of adjacent cell terminals to the service cell, has more comprehensive data and can better analyze the uplink interference situation.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for determining an interference strength in a cell system.
Background
An OFDMA (Orthogonal Frequency Division Multiple Access) Access mode is adopted in a downlink of an LTE (Long Term Evolution) system, and an SC-FDMA (Single-carrier Frequency-Division Multiple Access) Access mode is adopted in an uplink. Due to the inherent characteristic of OFDMA/SC-FDMA, that is, Physical Resource Blocks (PRBs) used by all UEs (User equipments) in a cell are orthogonal to each other in the frequency domain, the interference in the cell is small. However, since the frequency reuse factor of LTE is 1, that is, all cells use the whole system frequency band at the same time, interference in the LTE system becomes non-negligible, especially Cell Edge Users (CEUs), which are interfered by downlink signals of the neighboring Cell on the one hand and by uplink signals of the Cell Edge Users (CEUs) on the other hand.
In the prior art, a network management side is mainly used for capturing interference level strength of all RBs (Resource blocks ) in a bandwidth to judge whether the interference is received, and specific capturing technical details are as follows: and the base station eNodeB acquires the interference level intensity on the RB according to a certain frequency dimension and a certain time dimension. Taking 20MHz bandwidth as an example, there are 100 frequency dimensions and 4 time dimensions, which are: the 1 st time dimension is the 1 st symbol of UpPTS (uplink pilot); the 2 nd time dimension is the 2 nd symbol of the UpPTS; the 3 rd time dimension is the first half subframe of the last uplink subframe; the 4 th time dimension is a second half subframe of the last uplink subframe. Taking subframe allocation 1 as an example, the frequency dimension and the time dimension are shown in fig. 1. For the special subframe UpPTS, the eNodeB occupies both RB and idle RB for interference detection. The eNodeB samples a set of data every 5s and averages the interference noise power of each sample RB over the "supervision period". Based on the interference noise power average for each sample RB, the eNodeB averages each time dimension. And the measurement system measures the total power of the background noise and the adjacent cell interference on each uplink PRB every TTI, and averages the total power on the level of the PRBs, and the value is used as a sample point. And at the end of the counting period, calculating the average value of each sample point in the period as the average value of the PRB-level interference noise detected on each PRB in the system uplink. The resulting measurements include the average of the interference power per cell per hour RB00-RB99 over a statistical time period (typically at least statistically 24 consecutive hours). Generally, the TD-LTE noise floor is-174 +10Log (180K) + NF (value 4) — 117 dBm/RB. Considering that the international convention sacrifices the desensitization of 0.8dB corresponding to 5% throughput (the allowable interference is 7dB lower than the background noise), finally, the interference power on each RB is inferred to be higher than-116.2 dBm/RB, and the existence of certain interference in the cell can be inferred.
Therefore, the existing method depends on the background acquisition at the network management side, and has the defects of untimely processing and poor real-time performance. The collected data needs special software processing, mainly aims at intersystem (an external system aims at a TD-LTE system) interference, and does not carefully analyze the intersystem interference. The prior art obtains the average value of the PRB-level interference noise detected on each PRB of the system uplink, only considers the result detected by the serving cell, and fails to embody the influence of the adjacent cell on the users of the serving cell in detail.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a device for determining the intra-cell system interference strength, which can solve the problem that the influence of an adjacent cell on a service cell user cannot be embodied in detail mainly aiming at inter-system interference and only considering the result detected by the service cell in the prior art.
In a first aspect, the present invention provides a method for determining an interference strength in a cell system, where the method includes:
obtaining measurement reports periodically reported by each neighboring cell terminal of a target cell, and screening out one or more first measurement reports which are reported by one or more terminals at a preset time point and are taken as neighboring cells of the target cell;
obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the reference signal receiving power of the target cell in each first measurement report and the transmission power margin of the terminal reporting the first measurement report;
and obtaining the interference intensity of the uplink signals of the one or more terminals to the target cell according to the interference intensity of each terminal serving as an interference source to reach the target cell, wherein the interference intensity of each terminal serving as the interference source reports the first measurement report.
Optionally, the measurement report is a sample class measurement report, MRO;
correspondingly, the screening of one or more first measurement reports that the target cell is a neighboring cell and reported by one or more terminals at a preset time point includes:
and screening one or more measurement reports with a preset time point and the target cell as the neighbor cell according to a sample measurement time TimeStamp field in the measurement report and a physical cell identification code MR.
Optionally, the obtaining, according to the reference signal received power of the target cell in each first measurement report and the transmit power headroom of the terminal reporting the first measurement report, the interference strength of the terminal reaching the target cell as an interference source includes:
obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmitting power corresponding to the target cell and the numerical value corresponding to the reference signal receiving power MR.LtencRSRP field of the adjacent cell in the first measurement report;
acquiring a transmitting power value of the terminal according to the configured maximum transmitting power and a value corresponding to a transmitting power margin MR.LtessPHR field of the terminal in the first measurement report;
and obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the transmitting power value of the terminal and the path loss of the terminal in the target cell.
Optionally, the obtaining, according to the reference signal transmission power corresponding to the target cell and a numerical value corresponding to a reference signal received power mr.lterncrrp field of an adjacent cell in the first measurement report, a path loss of the corresponding terminal in the target cell includes:
according to the reference signal transmitting power CellA _ CRS corresponding to the target cell a and the numerical value CellA _ RSRP corresponding to the reference signal receiving power mr. lterncrrsrp field of the neighboring cell in the first measurement report, the path loss of the terminal reporting the first measurement report in the target cell is calculated by adopting a formula one:
and the path loss of the terminal in the target cell is CellA _ CRS-CellA _ RSRP formula I.
Optionally, the obtaining the transmission power value of the terminal according to the configured maximum transmission power and a value corresponding to the transmission power headroom mr.ltescphr field of the terminal in the first measurement report includes:
and calculating to obtain the transmitting power value of the terminal by adopting a formula two according to the configured maximum transmitting power Pcmax and the transmitting power margin MR.LtescPHR of the terminal:
and the transmission power value of the terminal is min (Pcmax, Pcmax-mr. ltescphr) formula two.
Optionally, the obtaining, according to the transmission power value of the terminal and the path loss of the terminal in the target cell, the interference strength of the terminal reaching the target cell as an interference source includes:
and calculating a difference value between the transmitting power value of the terminal and the path loss of the terminal in the target cell, wherein the difference value is an interference strength value when the terminal is used as an interference source to reach the target cell.
Optionally, the obtaining, according to the strength of interference that each terminal that reports the first measurement report reaches the target cell as an interference source, the strength of interference that the uplink signal of the one or more terminals generates to the target cell includes:
and for a plurality of terminals reporting the first measurement report, summing the interference strength of each terminal serving as an interference source reaching the target cell to obtain the interference strength of uplink signals of the plurality of terminals on the target cell.
In a second aspect, the present invention provides an apparatus for determining an interference strength in a cell system, the apparatus comprising:
the measurement report screening unit is used for acquiring measurement reports periodically reported by each neighboring cell terminal of a target cell and screening one or more first measurement reports which are reported by one or more terminals to the target cell as a neighboring cell at a preset time point;
a first interference strength calculation unit, configured to obtain, according to the reference signal received power of the target cell in each first measurement report and a transmit power headroom of a terminal reporting the first measurement report, an interference strength at which the terminal reaches the target cell as an interference source;
and the second interference strength calculation unit is used for obtaining the interference strength of the uplink signals of the one or more terminals to the target cell according to the interference strength of the terminals which report the first measurement report and serve as interference sources to reach the target cell.
Optionally, the measurement report is a sample class measurement report, MRO;
correspondingly, the measurement report screening unit is specifically configured to:
and screening one or more measurement reports with a preset time point and the target cell as the neighbor cell according to a sample measurement time TimeStamp field in the measurement report and a physical cell identification code MR.
Optionally, the first interference strength calculation unit is specifically configured to:
obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmitting power corresponding to the target cell and the numerical value corresponding to the reference signal receiving power MR.LtencRSRP field of the adjacent cell in the first measurement report;
acquiring a transmitting power value of the terminal according to the configured maximum transmitting power and a value corresponding to a transmitting power margin MR.LtessPHR field of the terminal in the first measurement report;
and obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the transmitting power value of the terminal and the path loss of the terminal in the target cell.
According to the technical solution, after one or more first measurement reports that the target cell is a neighboring cell are screened out and reported by one or more terminals at a preset time point, the interference strength of each terminal reaching the target cell as an interference source is obtained according to the reference signal receiving power of the target cell and the transmitting power margin of the terminal in the first measurement reports, and the interference strength of an uplink signal of the one or more terminals on the target cell is further obtained. Therefore, the interference of the uplink signal of the TD-LTE terminal to the adjacent cell is obtained by analyzing and counting the measurement report, the main focus is to calculate the interference intensity in the cell system, the average value of PRB-level interference noise can be obtained, the interference intensity on the whole physical uplink shared channel PUSCH can also be obtained, the interference situation of a plurality of adjacent cell terminals to the service cell can be reflected, the data is more comprehensive, and the uplink interference situation can be better analyzed.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram in the frequency and time dimensions;
fig. 2 is a flowchart illustrating a method for determining an interference strength in a cell system according to an embodiment of the present invention;
fig. 3 is a schematic view of a scenario in which a plurality of terminals report Cell a as a neighboring Cell according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for determining an interference strength in a cell system according to an embodiment of the present invention;
fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic flow chart of a method for determining an interference strength in a cell system according to an embodiment of the present invention, where an execution subject of the embodiment is a network management system, and as shown in fig. 2, the method includes the following steps:
s1: the method comprises the steps of obtaining measurement reports periodically reported by each neighbor cell terminal of a target cell, and screening out one or more first measurement reports which are reported by one or more terminals at a preset time point and are taken as neighbor cells of the target cell.
It should be noted that, the interferences brought by the uplink signals of the terminals to the target cell at different time points are different, and the interferences brought by the uplink signals of the terminals to the target cell at different time points need to be calculated respectively, so in this embodiment, one or more first measurement reports that the target cell is a neighboring cell need to be screened out at preset time points to obtain the interference strength of the uplink signals of one or more terminals at the time point to the target cell. Understandably, Measurement Report (MR) data is control plane signaling data based on millisecond grain level, has massive characteristics, and can reflect network quality and network coverage level of a main serving cell and an adjacent cell when a user is in a service state. 3GPP TS 25.331 defines format requirements of various measurement reports such as co-frequency measurement, inter-frequency measurement, quality measurement, UE internal measurement, UE position measurement, traffic measurement and the like. Measurement is an important function of TD-LTE systems. The measurement result reported by the physical layer can be used for triggering events such as cell selection/reselection and handover by a radio resource control sublayer in the system, and can also be used for system operation and maintenance and observing the running state of the system. The network device should have the capability to measure the specified measurement report data. When the measurement mode adopts periodic measurement, the reporting period can be configured when the measurement task is customized. LTE MRs can be classified into measurement report sample data (MRO), event triggered Measurement Report (MRE), Measurement Report Statistics (MRs) according to measurement data classification: the MRO is triggered periodically, a reporting period needs to be configured, and the definition is performed on the device side (the algorithm is based on the MRO); MRE is event trigger, and utilizes the time measurement of network starting without additionally starting measurement; MRS is based on operator defined statistics levels data, including one-dimensional, two-dimensional statistics.
In this embodiment, MRO data is mainly used. Specifically, the periodic MR measurement is started for the whole network, MR analysis is performed on the measurement result, and measurement report information that all reported target cells (e.g., cell a) are neighboring cells at the same time point is found.
S2: and obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the reference signal receiving power of the target cell in each first measurement report and the transmission power margin of the terminal reporting the first measurement report.
Specifically, if a target cell (for example, cell a) in measurement reports reported by multiple terminals is a neighboring cell, an interference strength value of the terminal reaching the target cell as an interference source may be obtained according to a reference signal received power of the neighboring cell (for example, the target cell) in each measurement report and a transmission power margin of the terminal (for example, the terminal reporting the measurement report).
S3: and obtaining the interference intensity of the uplink signals of the one or more terminals to the target cell according to the interference intensity of each terminal serving as an interference source to reach the target cell, wherein the interference intensity of each terminal serving as the interference source reports the first measurement report.
Specifically, according to step S2, interference strength values of the terminals serving as interference sources reaching the target cell are respectively calculated, and when a plurality of terminals report that the target cell is a neighbor cell at a preset time point, the interference strength values corresponding to the terminals need to be summed, so that the interference strength value generated by the uplink signals of the terminals on the target cell can be obtained.
In this embodiment, after one or more first measurement reports that the target cell is a neighboring cell are screened out and reported by one or more terminals at a preset time point, according to the reference signal receiving power of the target cell and the transmission power margin of the terminal in the first measurement reports, the interference strength of each terminal reaching the target cell as an interference source is obtained, and further, the interference strength of uplink signals of the one or more terminals on the target cell is obtained. Therefore, in the embodiment, the interference of the uplink signal of the TD-LTE terminal to the neighboring cell is obtained by analyzing and counting the measurement report, the main focus is to calculate the intra-cell system interference strength, which can not only obtain the average value of PRB level interference noise, but also obtain the interference strength on the entire physical uplink shared channel PUSCH, and can reflect the interference situation of multiple neighboring cell terminals to the serving cell, so that the data is more comprehensive, and the uplink interference situation can be better analyzed.
Moreover, the algorithm of the embodiment is simple, the algorithm can be deployed on a network management system, the high-interference cell can be rapidly calculated and screened according to the MRO setting period (generally 15 minutes), and the real-time performance is high; further, when a high-interference cell is obtained, the UE with a high interference contribution degree can be found, and positioning analysis is carried out on the problem. The method can quickly obtain the results of the interference cell, the interference intensity, the high-interference cell priority and the like, and can optimize the cells by adjusting the network structure, balancing the frequency point load and the like at the later stage, namely, a powerful reference is provided for network optimization.
Specifically, the measurement report in step S1 is a sample type measurement report MRO.
Understandably, the MRO data sources mainly include the following: MR.LtesScRSRP, MR.LtescNRSRP, MR.LtesScRSRQ, MR.LtescNRSRQ, MR.LtesScEarfcn, MR.LtesScPci, MR.LtescNEarfcn, MR.LtescNPcPci, MR.LtesScRTTD, MR.LtesScPHR, MR.LtesScRIP, MR.LtesScAOA, MR.LtesCrULQci 1-9, MR.LtesCrPlQci-9, MR.LtesScSinUL, MR.GsNceBcch, MR.GsNcellCarrRSSI, MR.GsNcenncNcnBcc, MR.TdscppchRSCP, MR.TdsNcUcfn, MR.TdsParameterId, etc.
Correspondingly, the screening out, at a preset time point, one or more first measurement reports that the target cell is a neighboring cell and that the one or more terminals report the target cell as the neighboring cell in step S1 specifically includes:
and screening one or more measurement reports with a preset time point and the target cell as the neighbor cell according to a sample measurement time TimeStamp field in the measurement report and a physical cell identification code MR.
Further, in an optional embodiment of the present invention, the step S2 specifically includes the following sub-steps:
s21: and obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmitting power corresponding to the target cell and the numerical value corresponding to the reference signal receiving power MR.LtencRSRP field of the adjacent cell in the first measurement report.
S22: and obtaining the transmitting power value of the terminal according to the configured maximum transmitting power and the value corresponding to the transmitting power margin MR.
S23: and obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the transmitting power value of the terminal and the path loss of the terminal in the target cell.
In this embodiment, two fields, MR. lterncsrsrp and MR. ltescphr, in the MR data are mainly used. Wherein mr. lterncsrsrp represents the neighbor level strength measured by the UE. Ltescphr defines the margin of the UE with respect to the configured maximum transmit power. In the headroom type 1, the margin represents the difference between the UL-SCH transmission power of the serving cell and the configured maximum transmission power. In the headroom type 2, the margin represents the UL-SCH transmission power of each activated serving cell or the PUSCH (Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel) transmission power values of the serving cell and the difference from the configured maximum transmission power.
Wherein, the UE end transmits power P of PUSCH on subframe iPUSCH(i) The formula is as follows:
wherein, PcmaxIs the maximum transmit power configured by the UE; mPUSCH(i) Is the transmission bandwidth of the PUSCH in subframe i; pO_PUSCH(j) Is an open loop power control parameter; α is a cell-specific path loss compensation factor, α (j) ∈ {0,0,4,0,5,0,6,0,7,0,8,0,9,1} when j is 0 or 1, α (j) is 1, α is 1, and α is 1, which is complete path loss compensation, α is 1<1 is partial path loss compensation(ii) a PL is a downlink path loss estimate measured and calculated at the UE end; deltaTF(i) Is a modulation coding mode dependent power offset; f (i) is the current PUSCH power control adjustment state. Ltescphr is the transmit power headroom of the UE, defined as the difference between the configured maximum transmit power and the UE transmit power.
Further, the value range of the mr.ltescphr can be obtained according to the statistical data of the mr.ltescphr field in the measurement report and the measurement data interval distribution of the mr.ltescphr in the table one.
Table one measurement data interval distribution of mr. ltescphr
Specifically, the step S21 specifically includes:
according to the reference signal transmitting power CellA _ CRS corresponding to the target cell a and the numerical value CellA _ RSRP corresponding to the reference signal receiving power mr. lterncrrsrp field of the neighboring cell in the first measurement report, the path loss of the terminal reporting the first measurement report in the target cell is calculated by adopting a formula (2):
path loss of the terminal in the target cell is CellA _ CRS-CellA _ RSRP (2)
Specifically, the step S22 specifically includes:
calculating to obtain the transmission power value of the terminal by adopting a formula (3) according to the configured maximum transmission power Pcmax and the transmission power margin MR.LtescPHR of the terminal:
the transmitting power value of the terminal is min (Pcmax, Pcmax-MR. LtescPHR) (3)
Specifically, the step S23 specifically includes:
and calculating a difference value between the transmitting power value of the terminal and the path loss of the terminal in the target cell, wherein the difference value is an interference strength value when the terminal is used as an interference source to reach the target cell.
Further, step S3 specifically includes:
and for a plurality of terminals reporting the first measurement report, summing the interference strength of each terminal serving as an interference source reaching the target cell to obtain the interference strength of uplink signals of the plurality of terminals on the target cell.
It should be noted that, when a plurality of terminals report a plurality of measurement reports that a target cell is a neighboring cell at a preset time point, the interference strengths of the terminals serving as interference sources reaching the target cell are summed to obtain the interference strength of uplink signals of the terminals on the target cell; and only one terminal reports the measurement report that the target cell is the neighboring cell at the preset time point, and the interference strength of the terminal serving as an interference source reaching the target cell at the time is the interference strength of an uplink signal of the terminal at the preset time point on the target cell.
For example, as shown in fig. 3, for a target Cell a, all measurement reports that report that Cell a is a neighbor Cell at the same time point are found: a measurement report MR1 reported by UE1, a measurement report MR2 reported by UE2, and a measurement report MR3 reported by UE 3. Wherein, the UE1 primary serving Cell is Cell B, and the reported measurement report MR1 includes: CellA RSRP1 and mr. ltescphr 1; the UE2 has a primary serving Cell of Cell C, and the reported measurement report MR2 includes: CellA RSRP2 and mr. ltescphr 2; the UE3 has a primary serving cell of CellD, and the reported measurement report MR3 includes: CellA RSRP3 and mr. ltescphr 3.
Further, according to MR 1: the path loss of the UE1 in CellA can be obtained by CellA RSRP1 ═ CellA CRS-UE1 in CellA; the transmission power of the UE1 can be obtained according to mr. ltescphrr 1; therefore, the transmission power of the UE1, the path loss of the UE1 in CellA, can obtain the interference level strength value of the UE1 as the interference source to the CellA.
Specifically, the UE1 reaches CellA with an interference level strength of min (Pcmax, Pcmax-mr. ltescphrr 1) - (CellA CRS-CellA RSRP1) as an interference source.
Similarly, the interference level strength of UE2 reaching CellA as the interference source and the interference level strength of UE3 reaching CellA as the interference source can be calculated. That is, according to the same method, combing out all cell measurement reports using CellA as the neighboring cell, and calculating the interference power of all the UE transmission power reaching CellA.
Further, summing the levels of the interference signals, and finally obtaining the level intensity of the CellA uplink interference (here, the intensity of all the RB interference on the PUSCH is obtained).
It should be noted that the algorithm in this embodiment is based on the approximation of the uplink and downlink signal path loss, and since the uplink and downlink of the TD-LTE system use the same frequency band, the uplink and downlink path loss can be considered to be approximately equal.
Thus, in the present embodiment, the existing network MRO is used to periodically obtain the mr.lteoncrrsrp and mr.ltescphr indexes, so that the uplink interference strength of all the existing network cells can be calculated, high interference cells in the system (in the system) can be identified, and such cells can be optimized by adjusting the network structure, balancing the frequency point load, and the like in the later period.
Fig. 4 is a schematic structural diagram of an apparatus for determining interference strength in a cell system according to the present invention, as shown in fig. 4, the apparatus includes: measurement report screening section 401, first interference strength calculation section 402, and second interference strength calculation section 403. Wherein:
the measurement report screening unit 401 is configured to obtain measurement reports periodically reported by each neighboring cell terminal of a target cell, and screen out one or more first measurement reports that the target cell is a neighboring cell and are reported by one or more terminals at a preset time point; the first interference strength calculation unit 402 is configured to obtain, according to the reference signal received power of the target cell in each first measurement report and the transmit power headroom of the terminal reporting the first measurement report, an interference strength of the terminal reaching the target cell as an interference source; the second interference strength calculation unit 403 is configured to obtain, according to the interference strength of each terminal that reports the first measurement report and reaches the target cell as an interference source, the interference strength that the uplink signal of the one or more terminals generates to the target cell.
In this embodiment, after a plurality of first measurement reports that a target cell is a neighboring cell and reported by a plurality of terminals at a preset time point are screened by the measurement report screening unit 401, the first interference strength calculation unit 402 obtains, according to the reference signal received power of the target cell and the transmission power margin of the terminals in the first measurement reports, the interference strength of each terminal reaching the target cell as an interference source, and further obtains, by the second interference strength calculation unit 403, the interference strength generated by uplink signals of the plurality of terminals on the target cell. Therefore, in the embodiment, the interference of the uplink signal of the TD-LTE terminal to the neighboring cell is obtained by analyzing and counting the measurement report, the main focus is to calculate the intra-cell system interference strength, which can not only obtain the average value of PRB level interference noise, but also obtain the interference strength on the entire physical uplink shared channel PUSCH, and can reflect the interference situation of multiple neighboring cell terminals to the serving cell, so that the data is more comprehensive, and the uplink interference situation can be better analyzed.
Moreover, the device for determining the interference strength in the cell system in the embodiment is only required to be deployed in a network management system, and can quickly calculate and screen out a high-interference cell according to an MRO setting period (generally 15 minutes), so that the real-time performance is high; further, when a high-interference cell is obtained, the UE with a high interference contribution degree can be found, and positioning analysis is carried out on the problem. The method can quickly obtain the results of the interference cell, the interference intensity, the high-interference cell priority and the like, and can optimize the cells by adjusting the network structure, balancing the frequency point load and the like at the later stage, namely, a powerful reference is provided for network optimization.
In an optional embodiment of the invention, the measurement report is a sample class measurement report, MRO.
Correspondingly, the measurement report screening unit 401 is specifically configured to:
and screening one or more measurement reports with a preset time point and the target cell as the neighbor cell according to a sample measurement time TimeStamp field in the measurement report and a physical cell identification code MR.
In an optional embodiment of the present invention, the first interference strength calculating unit 402 is specifically configured to:
obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmitting power corresponding to the target cell and the numerical value corresponding to the reference signal receiving power MR.LtencRSRP field of the adjacent cell in the first measurement report;
acquiring a transmitting power value of the terminal according to the configured maximum transmitting power and a value corresponding to a transmitting power margin MR.LtessPHR field of the terminal in the first measurement report;
and obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the transmitting power value of the terminal and the path loss of the terminal in the target cell.
Specifically, the first interference strength calculating unit 402 is further configured to:
according to the reference signal transmitting power CellA _ CRS corresponding to the target cell a and the numerical value CellA _ RSRP corresponding to the reference signal receiving power mr. lterncrrsrp field of the neighboring cell in the first measurement report, the path loss of the terminal reporting the first measurement report in the target cell is calculated by adopting a formula one:
and the path loss of the terminal in the target cell is CellA _ CRS-CellA _ RSRP formula I.
Specifically, the first interference strength calculating unit 402 is further configured to:
and calculating to obtain the transmitting power value of the terminal by adopting a formula two according to the configured maximum transmitting power Pcmax and the transmitting power margin MR.LtescPHR of the terminal:
and the transmission power value of the terminal is min (Pcmax, Pcmax-mr. ltescphr) formula two.
Specifically, the first interference strength calculating unit 402 is further configured to:
and calculating a difference value between the transmitting power value of the terminal and the path loss of the terminal in the target cell, wherein the difference value is an interference strength value when the terminal is used as an interference source to reach the target cell.
Further, the second interference strength calculating unit 403 is specifically configured to:
and for a plurality of terminals reporting the first measurement report, summing the interference strength of each terminal serving as an interference source reaching the target cell to obtain the interference strength of uplink signals of the plurality of terminals on the target cell.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
Fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention.
Referring to fig. 5, the electronic device includes: a processor (processor)501, a memory (memory)502, a communication Interface (Communications Interface)503, and a bus 504; wherein,
the processor 501, the memory 502 and the communication interface 503 complete mutual communication through the bus 504;
the communication interface 503 is used for information transmission between the electronic device and the communication device of the base station;
the processor 501 is configured to call program instructions in the memory 502 to perform the methods provided by the above-mentioned method embodiments, for example, including: obtaining measurement reports periodically reported by each neighboring cell of a target cell, and screening out a plurality of first measurement reports which are reported by a plurality of terminals at a preset time point and are taken as the neighboring cells of the target cell; obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the reference signal receiving power of the target cell in each first measurement report and the transmission power margin of the terminal reporting the first measurement report; and obtaining the interference intensity of the uplink signals of the plurality of terminals to the target cell according to the interference intensity of each terminal which reports the first measurement report and serves as an interference source to reach the target cell.
An embodiment of the present invention discloses a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including: obtaining measurement reports periodically reported by each neighboring cell of a target cell, and screening out a plurality of first measurement reports which are reported by a plurality of terminals at a preset time point and are taken as the neighboring cells of the target cell; obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the reference signal receiving power of the target cell in each first measurement report and the transmission power margin of the terminal reporting the first measurement report; and obtaining the interference intensity of the uplink signals of the plurality of terminals to the target cell according to the interference intensity of each terminal which reports the first measurement report and serves as an interference source to reach the target cell.
An embodiment of the present invention discloses a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to execute the methods provided by the above method embodiments, for example, the method includes: obtaining measurement reports periodically reported by each neighboring cell of a target cell, and screening out a plurality of first measurement reports which are reported by a plurality of terminals at a preset time point and are taken as the neighboring cells of the target cell; obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the reference signal receiving power of the target cell in each first measurement report and the transmission power margin of the terminal reporting the first measurement report; and obtaining the interference intensity of the uplink signals of the plurality of terminals to the target cell according to the interference intensity of each terminal which reports the first measurement report and serves as an interference source to reach the target cell.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the test equipment and the like of the display device are merely illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for determining interference strength in a cellular system, the method comprising:
obtaining measurement reports periodically reported by each neighboring cell terminal of a target cell, and screening out one or more first measurement reports which are reported by one or more terminals at a preset time point and are taken as neighboring cells of the target cell;
obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the reference signal receiving power of the target cell in each first measurement report and the transmission power margin of the terminal reporting the first measurement report;
obtaining the interference intensity of the uplink signals of the one or more terminals to the target cell according to the interference intensity of each terminal serving as an interference source to reach the target cell, wherein the interference intensity is generated by the terminal serving as the interference source;
the obtaining, according to the reference signal received power of the target cell in each first measurement report and the transmit power headroom of the terminal reporting the first measurement report, the interference strength of the terminal reaching the target cell as an interference source includes:
obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmitting power corresponding to the target cell and the numerical value corresponding to the reference signal receiving power MR.LtencRSRP field of the adjacent cell in the first measurement report;
acquiring a transmitting power value of the terminal according to the configured maximum transmitting power and a value corresponding to a transmitting power margin MR.LtessPHR field of the terminal in the first measurement report;
obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the transmitting power value of the terminal and the path loss of the terminal in the target cell;
the obtaining, according to the transmission power value of the terminal and the path loss of the terminal in the target cell, the interference strength of the terminal reaching the target cell as an interference source includes:
calculating a difference value between the transmission power value of the terminal and the path loss of the terminal in the target cell, wherein the difference value is an interference strength value when the terminal serves as an interference source and reaches the target cell;
the obtaining, according to the strength of interference that each terminal that reports the first measurement report reaches the target cell as an interference source, the strength of interference that the uplink signal of the one or more terminals generates to the target cell includes:
and for a plurality of terminals reporting the first measurement report, summing the interference strength of each terminal serving as an interference source reaching the target cell to obtain the interference strength of uplink signals of the plurality of terminals on the target cell.
2. The method according to claim 1, wherein the measurement report is a sample class measurement report, MRO;
correspondingly, the screening of one or more first measurement reports that the target cell is a neighboring cell and reported by one or more terminals at a preset time point includes:
and screening one or more measurement reports with a preset time point and the target cell as the neighbor cell according to a sample measurement time TimeStamp field in the measurement report and a physical cell identification code MR.
3. The method of claim 1, wherein the obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmission power corresponding to the target cell and the value corresponding to the reference signal received power mr.ltenncrrp field of the neighboring cell in the first measurement report comprises:
according to the reference signal transmitting power CellA _ CRS corresponding to the target cell a and the numerical value CellA _ RSRP corresponding to the reference signal receiving power mr. lterncrrsrp field of the neighboring cell in the first measurement report, the path loss of the terminal reporting the first measurement report in the target cell is calculated by adopting a formula one:
and the path loss of the terminal in the target cell is CellA _ CRS-CellA _ RSRP formula I.
4. The method according to claim 1, wherein the obtaining the transmission power value of the terminal according to the configured maximum transmission power and a value corresponding to a mr.ltescphr field of the transmission power headroom of the terminal in the first measurement report comprises:
and calculating to obtain the transmitting power value of the terminal by adopting a formula two according to the configured maximum transmitting power Pcmax and the transmitting power margin MR.LtescPHR of the terminal:
and the transmission power value of the terminal is min (Pcmax, Pcmax-mr. ltescphr) formula two.
5. An apparatus for determining interference strength in a cellular system, the apparatus comprising:
the measurement report screening unit is used for acquiring measurement reports periodically reported by each neighboring cell terminal of a target cell and screening one or more first measurement reports which are reported by one or more terminals to the target cell as a neighboring cell at a preset time point;
a first interference strength calculation unit, configured to obtain, according to the reference signal received power of the target cell in each first measurement report and a transmit power headroom of a terminal reporting the first measurement report, an interference strength at which the terminal reaches the target cell as an interference source;
a second interference strength calculation unit, configured to obtain, according to interference strength of each terminal that reports the first measurement report and reaches the target cell as an interference source, interference strength that the uplink signal of the one or more terminals generates to the target cell;
the first interference strength calculation unit is specifically configured to:
obtaining the path loss of the corresponding terminal in the target cell according to the reference signal transmitting power corresponding to the target cell and the numerical value corresponding to the reference signal receiving power MR.LtencRSRP field of the adjacent cell in the first measurement report;
acquiring a transmitting power value of the terminal according to the configured maximum transmitting power and a value corresponding to a transmitting power margin MR.LtessPHR field of the terminal in the first measurement report;
obtaining the interference strength of the terminal serving as an interference source reaching the target cell according to the transmitting power value of the terminal and the path loss of the terminal in the target cell;
the obtaining, according to the transmission power value of the terminal and the path loss of the terminal in the target cell, the interference strength of the terminal reaching the target cell as an interference source includes:
calculating a difference value between the transmission power value of the terminal and the path loss of the terminal in the target cell, wherein the difference value is an interference strength value when the terminal serves as an interference source and reaches the target cell;
the obtaining, according to the strength of interference that each terminal that reports the first measurement report reaches the target cell as an interference source, the strength of interference that the uplink signal of the one or more terminals generates to the target cell includes:
and for a plurality of terminals reporting the first measurement report, summing the interference strength of each terminal serving as an interference source reaching the target cell to obtain the interference strength of uplink signals of the plurality of terminals on the target cell.
6. The apparatus of claim 5, wherein the measurement report is a sample class Measurement Report (MRO);
correspondingly, the measurement report screening unit is specifically configured to:
and screening one or more measurement reports with a preset time point and the target cell as the neighbor cell according to a sample measurement time TimeStamp field in the measurement report and a physical cell identification code MR.
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| CN111294920B (en) * | 2018-12-10 | 2021-05-18 | 中国移动通信集团四川有限公司 | Method, device, equipment and medium for identifying interference in LTE network |
| CN111601348B (en) * | 2019-06-19 | 2022-01-28 | 维沃移动通信有限公司 | Information reporting and acquiring method, terminal and network side equipment |
| CN113068218B (en) * | 2020-01-02 | 2022-07-01 | 中国移动通信集团设计院有限公司 | Cell network coverage assessment method and device based on measurement report |
| CN113873565B (en) * | 2020-06-30 | 2023-07-21 | 中国移动通信集团设计院有限公司 | Co-channel interference positioning method, device, equipment and storage medium |
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