CN102916754A - Method and device for measuring reference signal receiving power - Google Patents
Method and device for measuring reference signal receiving power Download PDFInfo
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Abstract
The invention disclose a method and a device for measuring reference signal receiving power (RSRP), which can acquire the RSRP of all RRUs (Radio Remote Units), and relates to the technical field of communication networks. The scheme provided by the embodiment of the invention is that CSI-RSs (Channel State Information-Reference Symbols) at different time frequency positions are configured to all RRUs in a multi-RRU combined cell or the multi-RRU combined cell and the adjacent cells through a base station; the base station sends all the CSI-RSs to UE (User Equipment), so that the UE can conveniently measure the RSRP according to the time-frequency positions of all the CSI-RSs; and the base station receives all the CSI-RSs reported by the UE and the RSRP corresponding to all the CSI-RSs and acquires the RSRP of all the RRUs in the multi-RRU combined cell or the multi-RRU combined cell and the adjacent cells. The embodiment of the invention is suitable for measuring the RSRP.
Description
Technical Field
The present invention relates to the field of communications network technologies, and in particular, to a method and an apparatus for measuring reference signal received power.
Background
At present, the problem of inter-cell interference can be solved by a Radio Remote Unit (RRU) cell merging technology. Combining multiple RRUs into one cell may use the following two combining methods: firstly, a plurality of RRUs with the same channel are combined into a cell, which may be called a Single Frequency Network (SFN) cell; second, the RRUs with N channels and the RRUs with M channels are combined into a cell, which may be referred to as an N + M cell.
When measuring the downlink Reference Signal Receiving Power (RSRP) of a Cell with multiple RRUs combined, the RSRP is usually measured according to a Cell-specific Reference signal (CRS), and a Cell-level downlink RSRP of the Cell, that is, the total Reference signal receiving Power after combining multiple RRU signals in the Cell, can be obtained.
However, when the prior art is used to measure the reference signal received power, only the received power after combining the signals of multiple RRUs can be obtained, so that when multiple RRUs are combined to cover a cell, the downlink reference signal received power of each RRU cannot be obtained, which results in that power setting cannot be performed for the RRUs covering the cell.
Disclosure of Invention
The invention provides a method and a device for measuring reference signal received power, which can obtain the reference signal received power of each RRU.
In a first aspect, the present invention provides a method for measuring reference signal received power, including:
a base station configures Channel state information Reference signals (CSI-RS) at different time-frequency positions for each RRU in a multi-RRU merging cell or the multi-RRU merging cell and adjacent cells thereof;
the base station sends each CSI-RS to User Equipment (UE), so that the UE measures Reference Signal Received Power (RSRP) according to the time-frequency position of each CSI-RS;
and the base station receives each CSI-RS reported by the UE and the RSRP corresponding to each CSI-RS, and acquires the RSRP of each RRU in a multi-RRU merging cell or the multi-RRU merging cell and a cell adjacent to the multi-RRU merging cell.
In a first possible implementation manner, with reference to the first aspect, the obtaining, by the base station, the RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cell includes:
the base station acquires the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof according to different CSI-RSs configured for each RRU in the multi-RRU merging cell and the RSRP corresponding to each CSI-RS.
In a second possible implementation manner, with reference to the first aspect, after the obtaining, by the base station, the RSRP of each RRU in the multi-RRU combining cell, the method further includes:
and the base station adjusts the downlink transmission power of at least one RRU in the multi-RRU merging cell according to the obtained RSRP of each RRU in the multi-RRU merging cell.
In a third possible implementation manner, with reference to the second possible implementation manner of the first aspect, the adjusting, by the base station, the downlink transmission power of at least one RRU in the multi-RRU combining cell includes:
the base station sets an output power adjustment value of at least one RRU in the multi-RRU combined cell so that the at least one RRU transmits by adopting the adjusted downlink power; or,
and the base station sets a downlink power configuration value of at least one RRU in the multi-RRU combined cell so that the at least one RRU adopts the configured downlink power to transmit.
In a fourth possible implementation manner, with reference to the first aspect, after acquiring RSRP of each RRU in the multi-RRU combining cell and its neighboring cell, the base station further includes:
and according to the obtained RSRP of each RRU in the multi-RRU merging cell and the adjacent cell thereof, the base station adjusts the multi-RRU merging cell into a new multi-RRU merging cell, wherein the new multi-RRU merging cell comprises part or all RRUs in the multi-RRU merging cell and part or all RRUs in the adjacent cell of the multi-RRU merging cell.
In a second aspect, the present invention provides a device for measuring reference signal received power, including:
a configuration unit, configured to configure CSI-RS at different time-frequency positions for multiple RRU combining cells or each RRU in the multiple RRU combining cells and their neighboring cells;
a sending unit, configured to send each CSI-RS to a user equipment UE, so that the UE measures reference signal received power RSRP according to a time-frequency position of each CSI-RS;
an obtaining unit, configured to receive each CSI-RS reported by the UE and an RSRP corresponding to each CSI-RS, and obtain an RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cells.
In a first possible implementation manner, with reference to the second aspect, the obtaining unit is configured to:
and acquiring the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof according to different CSI-RSs configured for each RRU in the multi-RRU merging cell and the RSRP corresponding to each CSI-RS.
In a second possible implementation manner, with reference to the second aspect, the apparatus further includes:
the first processing unit is configured to adjust downlink transmission power of at least one RRU in the multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell.
In a third possible implementation manner, with reference to the second possible implementation manner of the second aspect, the first processing unit includes:
a first setting module, configured to set an output power adjustment value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits using the adjusted downlink power; or,
a second setting module, configured to set a downlink power configuration value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits using the configured downlink power.
In a fourth possible implementation manner, with reference to the second aspect, the apparatus further includes:
and a second processing unit, configured to adjust the multi-RRU combining cell to a new multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell and its neighboring cell, where the new multi-RRU combining cell includes part or all of the RRUs in the multi-RRU combining cell, and includes part or all of the RRUs in the neighboring cell of the multi-RRU combining cell.
The embodiment of the invention provides a method and a device for measuring reference signal receiving power.A base station configures CSI-RSs of different time-frequency positions for RRUs in a multi-RRU merging cell or the multi-RRU merging cell and adjacent cells thereof; the base station sends each CSI-RS to UE so that the UE can measure RSRP according to the time-frequency position of each CSI-RS; and the base station receives each CSI-RS reported by the UE and the RSRP corresponding to each CSI-RS, and acquires the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof.
Compared with the prior art that when the reference signal receiving power is measured, the receiving power after combining the signals of the plurality of RRUs can only be obtained, so that when the cross-area coverage of the multi-RRU combining cell occurs, the power setting cannot be performed on the cross-area covered RRUs due to the fact that the downlink reference signal receiving power of each RRU cannot be obtained, the scheme provided by the embodiment of the invention can configure different CSI-RSs for the multi-RRU combining cell or each RRU in the multi-RRU combining cell and the adjacent cell thereof, and enable the terminal to measure the RSRP according to the time-frequency position of the CSI-RSs, so that the reference signal receiving power of each RRU can be obtained.
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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, and 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 flowchart of a method for measuring reference signal received power according to embodiment 1 of the present invention;
fig. 2 is a flowchart of another method for measuring received power of a reference signal according to embodiment 1 of the present invention;
fig. 3 is a schematic view of the handover coverage provided in embodiment 1 of the present invention;
fig. 4 is a flowchart of another method for measuring the received power of the reference signal according to embodiment 1 of the present invention;
fig. 5 is a block diagram of another apparatus for measuring received power of a reference signal according to embodiment 2 of the present invention;
fig. 6 is a block diagram of another apparatus for measuring the received power of a reference signal according to embodiment 2 of the present invention;
fig. 7 is a block diagram of another base station according to embodiment 2 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.
Example 1
An embodiment of the present invention provides a method for measuring reference signal received power, where an execution subject of the method is a base station, and as shown in fig. 1, the method includes:
the RRU is a radio remote unit, which means that the radio unit is pulled to a remote coverage target area through an optical fiber, wherein the optical fiber transmits a baseband signal. The base band processing units (BBUs) are centrally placed in a machine room, the RRUs can be installed at antenna ends, and one BBU can support multiple RRUs.
Because the distance between base stations is too small, the interference between cells is difficult to solve by adjusting the downward inclination angle of the antenna and other modes, and therefore a technology of combining multiple RRUs into a cell is introduced. Wherein, multiple RRUs combine cells, i.e. full cell transmission, and receive in sectors (coverage areas). The coverage area of a cell is divided into a plurality of sectors or a plurality of small coverage areas, each sector or small coverage area is received by different receiving antennas, and the transmitted signals of all the sectors or the coverage areas are the same. In the uplink direction, signals received by the plurality of RRUs are respectively sent to the BBU for processing, and in the downlink direction, the generated downlink signals are copied into a plurality of parts and sent to the RRUs, so that the effect of a full cell mode is achieved.
102, the base station sends each CSI-RS to User Equipment (UE), so that the UE measures Reference Signal Received Power (RSRP) according to the time-frequency position of each CSI-RS;
the base station may allocate different CSI-RSs to different RRUs and send the different CSI-RSs to the UE. And the time-frequency positions of the CSI-RSs corresponding to different RRUs are different.
RSRP is one of the key parameters that can represent the radio signal strength in an LTE network, and is the average of the received signal power over all Resource Elements (REs) that carry reference signals within a certain symbol.
In the prior art, when the downlink signal strength of a cell is measured, RSRP is usually measured according to CRS, but the RSRP measured in the prior art is a cell unit, that is, a superposition value of downlink RSRPs of a plurality of RRUs of the cell. In the invention, the base station configures different CSI-RSs for each RRU, so that the UE measures the RSRP through the time-frequency position of the CSI-RS, and can obtain the RSRP of each RRU in a cell, namely obtain the downlink RSRP of the RRU level.
In this step, the base station obtains RSRP of each RRU through internal mapping, and specifically, the base station obtains RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cells according to different CSI-RSs configured for each RRU in the multi-RRU combining cell and RSRP corresponding to each CSI-RS.
The embodiment of the invention provides a method for measuring reference signal received power, which is characterized in that different CSI-RSs are configured for each RRU in a multi-RRU merging cell or the multi-RRU merging cell and an adjacent cell thereof, so that a terminal can measure RSRP according to the time-frequency position of the CSI-RSs, and the reference signal received power of each RRU is obtained.
The present invention provides another method for measuring received power of a reference signal, as shown in fig. 2, the method includes:
step 201, a base station configures channel state information reference signals CSI-RS at different time frequency positions for each RRU in a multi-RRU merging cell;
the base station can configure the CSI-RS with different time frequency positions for different RRUs in the multi-RRU merging cell, wherein the different CSI-RSs refer to different time frequency positions of the CSI-RS, and the time frequency positions refer to resource positions where resources in a time dimension and resources in a frequency dimension intersect. The Time-dimension Resource may be different Transmission Time Intervals (TTIs), and the frequency-dimension Resource may be different Physical Resource Blocks (PRBs). Specifically, when the base station configures the CSI-RS for each RRU, it is only required to ensure that the CSI-RS of each RRU in the multi-RRU combining cell is different, and thus, the CSI-RS can be determined for each RRU by using different configurations of the CSI-RS specified in the communication protocol.
Step 202, a base station sends each CSI-RS to User Equipment (UE), so that the UE measures Reference Signal Received Power (RSRP) according to the time-frequency position of each CSI-RS;
in this step, the base station may send each CSI-RS to the UE through sending a Radio Resource Control (RRC) connection reconfiguration message.
RSRP is one of the key parameters that can represent the radio signal strength in an LTE network, and is the average of the received signal power over all Resource Elements (REs) that carry reference signals within a certain symbol.
Step 203, the UE receives the CSI-RS configured for each RRU sent by the base station, and measures RSRP according to the time-frequency position of the CSI-RS;
in this step, the UE obtains the CSI-RS configured by the base station for each RRU by receiving the RRC connection reconfiguration message sent by the base station, queries the period and offset corresponding to the CSI-RS, calculates the time-frequency position of the CSI-RS according to the queried period and offset corresponding to the CSI-RS, and measures RSRP at the calculated time-frequency position of the CSI-RS.
Step 204, the UE reports each CSI-RS and the measured RSRP corresponding to each RRU to a base station;
optionally, the UE may report each CSI-RS and RSRP corresponding to each measured RRU to the base station in a CSI-RS RSRP measurement report form. When the difference between the CSI-RS RSRP of a certain adjacent RRU measured by the UE and the CSI-RS RSRP of the RRU is higher than a preset threshold, triggering the report of a CSI-RS RSRP measurement report, wherein the RRU can be any one of the RRUs in the multi-RRU merging cell, the adjacent RRU can be the RRU directly adjacent to the RRU, and the adjacent RRU is also the RRU in the multi-RRU merging cell; the preset threshold may be set empirically. The CSI-RS RSRP measurement report comprises the CSI-RS of the RRU, the CSI-RS RSRP of the RRU, the CSI-RS of each RRU adjacent to the RRU and the CSI-RS RSRP of each RRU adjacent to the RRU.
In addition, the UE may also use other manners, for example, a manner of setting a timer, when reporting each CSI-RS and the measured RSRP corresponding to each RRU to the base station, and when the set time arrives, report each CSI-RS and the measured RSRP corresponding to each RRU to the base station. That is, the embodiment of the present invention does not limit the reporting mode of the UE.
Step 205, a base station receives each CSI-RS reported by the UE and RSRPs corresponding to each CSI-RS, and obtains RSRPs of each RRU in the multi-RRU combining cell;
in this step, the base station obtains RSRP of each RRU through internal mapping according to each received CSI-RS reported by the UE and RSRP corresponding to each CSI-RS. Specifically, the base station performs mapping according to different CSI-RSs configured for each RRU in the multi-RRU combining cell in step 201 and the received RSRP corresponding to each CSI-RS reported by the UE, so as to obtain the RSRP of each RRU in the multi-RRU combining cell.
Step 206, according to the obtained RSRP of each RRU in the multi-RRU combining cell, the base station adjusts the downlink transmission power of at least one RRU in the multi-RRU combining cell.
In this embodiment, as shown in fig. 3, although the UE is in the coverage area of CELL1, where the coverage area of CELL1 is represented by a black frame, the CELL2 signal in the coverage area of CELL1 is relatively strong, so that the UE resides in CELL2, and since the RSRP of each RRU in the CELL can only be obtained when the downlink signal strength is measured in the prior art, and the RSRP of each RRU in the CELL cannot be obtained, it can only be known in the coverage area of CELL1 that the downlink signal of CELL2 is strong, there is a handover coverage, but it cannot be specifically known which RRU in CELL2 has a larger power setting, and therefore no specific adjustment can be performed.
In addition, there is another situation that, in a multi-RRU combining cell, if there is pilot pollution, that is, there are too many strong pilots at a certain point where the UE resides, but there is not enough strong primary pilot to make the UE stably reside, that is, the downlink signal strength of each multi-RRU combining cell is close to each other, so that the UE cannot stably reside in a certain cell. In the prior art, only the RSRP at the cell level can be obtained when the downlink signal strength is measured, and the RSRP of each RRU in the cell cannot be obtained, so that even if it is known that signals are close before some RRUs are combined into the cell and pilot pollution exists, it is unclear which RRU downlink power setting should be adjusted, and thus specific adjustment cannot be performed.
Therefore, according to the RSRP of each RRU in the CELL merged by multiple RRUs, the present embodiment may determine that the RSRP of a certain RRU in CELL2 is set too large in a scenario where handover coverage exists, resulting in the CELL2 having the handover coverage, and at this time, may adjust the RRU with the RSRP set too large in CELL 2. In addition, in a scene with pilot pollution, downlink power setting can be performed on at least one RRU according to the RSRP of the at least one RRU in the cell combined by the multiple RRUs, so that the pilot pollution of the cell combined by the multiple RRUs is avoided.
Specifically, in this step, the downlink power setting of the RRU may be performed in the following two ways: firstly, a base station sets an output power adjustment value of at least one RRU in a multi-RRU combined cell so that the at least one RRU transmits by adopting adjusted downlink power;
the method is to set the existing parameters, namely, the cell ID- > cabinet- > frame- > slot- > RRU output power adjustment value is set according to the existing parameters, wherein the cabinet is a parameter in the cell I D, the frame is a parameter in the cabinet, the slot is a parameter in the frame, and the parameter in the slot is set: and the RRU outputs a power adjustment value. The RRU output power adjustment value is a bias that increases or decreases by several dB based on the RRU transmit power. For example, in a scenario where there is a handover coverage, the transmit power of the RRU whose RSRP is set too large in CELL2 is reduced so that the handover coverage situation is eliminated.
Secondly, the base station sets a downlink power configuration value of at least one RRU in the multi-RRU combined cell, so that the at least one RRU transmits by adopting the configured downlink power.
The method is to set new parameters, namely, the new parameters are set according to the cell ID- > the number of RRUs in the cell- > cabinet- > frame- > slot- > downlink power configuration of each RRU level, namely, the downlink power of each RRU in the cell is reset. It should be noted that, when the cell is a multi-RRU merged cell, the newly added "downlink power configuration for each RRU level" parameter is valid, and when the cell is a normal cell, the newly added "downlink power configuration for each RRU level" parameter is invalid, and the original implementation manner is still adopted. Here, the "downlink power allocation" value is the power of a Cell-specific Reference Signal (CRS) pilot Signal of each Cell, and this value can be understood as the transmission power of the Cell on the base station side. For example, in a scene with pilot pollution, the downlink power of at least one RRU is set for the RRU level by obtaining RSRP of at least one RRU in each multi-RRU combined cell, so that one cell is a main pilot, and the UE can stably reside in the cell, thereby eliminating the pilot pollution.
According to the method for measuring the reference signal received power, the base station configures the CSI-RS with different time frequency positions for the multi-RRU merging cell, so that the terminal can measure the RSRP according to the time frequency positions of the CSI-RS, the base station can obtain the RSRP of each RRU, the power can be adjusted according to the RSRP of each RRU, and the cross-area coverage condition and the pilot frequency pollution condition can be avoided.
An embodiment of the present invention provides another method for measuring received power of a reference signal, as shown in fig. 4, the method includes:
step 401, a base station configures channel state information reference signals CSI-RS at different time frequency positions for each RRU in a multi-RRU merging cell and adjacent cells thereof;
step 402, a base station sends each CSI-RS to User Equipment (UE), so that the UE measures Reference Signal Received Power (RSRP) according to the time-frequency position of each CSI-RS;
in this step, a base station issues CSI-RS configured for Multiple RRU combining cells and each RRU in an adjacent cell to a UE, where the Multiple RRU combining cells and the adjacent cell belong to a Coordinated Multiple Points Transmission/Reception (CoMP) management set, the Multiple RRU combining cell is used as a local cell, the adjacent cell is a cell directly adjacent to the local cell, the CoMP management set may include at most 8 measurement targets, and the measurement targets may be cells or RRUs.
Step 403, the UE receives the CSI-RS configured for each RRU sent by the base station, and measures RSRP according to the time-frequency position of the CSI-RS;
step 404, the UE reports each CSI-RS and the measured RSRP corresponding to each RRU in the multi-RRU merging cell and the adjacent cell thereof to a base station;
optionally, the UE may report each CSI-RS and RSRP corresponding to each measured RRU to the base station in a CSI-RS RSRP measurement report form. When the difference between the CSI-RS RSRP of a certain adjacent RRU measured by the UE and the CSI-RS RSRP of the RRU is higher than a preset threshold, triggering the report of a CSI-RS RSRP measurement report, wherein the RRU can be any one of the RRUs in the multi-RRU merging cell, the adjacent RRU can be the RRU directly adjacent to the RRU, and the adjacent RRU is also the RRU in the multi-RRU merging cell; the preset threshold may be set empirically. The CSI-RS RSRP measurement report comprises the CSI-RS of the RRU, the CSI-RS RSRP of the RRU, the CSI-RS of each RRU adjacent to the RRU and the CSI-RS RSRP of each RRU adjacent to the RRU.
In addition, the UE may also use other manners, for example, a manner of setting a timer, when reporting each CSI-RS and the measured RSRP corresponding to each RRU to the base station, and when the set time arrives, report each CSI-RS and the measured RSRP corresponding to each RRU to the base station. That is, the embodiment of the present invention does not limit the reporting mode of the UE.
Step 405, a base station receives each CSI-RS reported by the UE and RSRPs corresponding to each CSI-RS in a multi-RRU combining cell and its neighboring cells, and obtains RSRPs of each RRU in the multi-RRU combining cell and its neighboring cells;
in this embodiment, steps 401 to 405 are the same as the operations of steps 201 to 205 in fig. 2, except that, in fig. 2, only the processing according to one multi-RRU merged cell is performed, and fig. 4 is the processing according to one multi-RRU merged cell and its neighboring cells, but the specific processing manners are the same, and specifically refer to the description of the operations of steps 201 to 205 in fig. 2, which is not repeated herein.
Step 406, according to the obtained RSRP of each RRU in the multi-RRU combining cell and its neighboring cell, the base station adjusts the multi-RRU combining cell to a new multi-RRU combining cell;
the new multi-RRU merging cell comprises part or all of the RRUs in the multi-RRU merging cell and part or all of the RRUs in a neighbor cell of the multi-RRU merging cell.
In this embodiment, in the later stage of network planning, the existing network has already completed network construction of a cell combining multiple RRUs, but due to long-term parameter setting, Radio Frequency (RF) optimization, and other work, the previous scheme of combining some RRUs into one cell is not optimal, that is, the original combining of some RRUs into one cell cannot obtain optimal interference suppression and other effects. However, in the prior art, only cell-level RSRP can be obtained, if the planning of the multi-RRU merged cell is performed again in case of failure, the existing multi-RRU merged cell can only be split into the common cells, then RSRP of the common cells is obtained again, and then an optimal new multi-RRU merged cell merging scheme is obtained by calculation according to a network gauge tool, that is, which RRUs are selected to be merged into one cell.
Therefore, by adopting the scheme provided by this embodiment, according to the obtained RSRP of each RRU in the multi-RRU combining cell and its neighboring cell and the implementation method of the network planning tool, the multi-RRU combining cell can be adjusted to a new multi-RRU combining cell, so as to achieve the optimal interference suppression effect.
The net gauge tool is realized by the following steps: inputting information such as a multi-RRU merging cell parameter table, an adjacent cell list, RSRP of adjacent cells and the like into a Network gauge tool, giving various Single Frequency Network (SFN) merging cell combinations according to the distance between base stations and the adjacent cell list, obtaining a Signal to Interference plus noise ratio (SINR) of the whole Network after certain SFN combination is adopted according to various SFN merging cell combinations and RSRP measurement values of the RRUs in the cells, and finally obtaining the SINR which is the largest, namely the SFN combination with the smallest Interference is the new multi-RRU merging cell.
Wherein, combining a plurality of RRUs into one cell may adopt the following two combining methods: firstly, combining a plurality of RRUs with the same channel into a cell, which can be called as an SFN cell; second, the RRUs with N channels and the RRUs with M channels are combined into one cell, which may be referred to as an N + M cell.
According to the method for measuring the reference signal received power provided by the embodiment of the invention, the base station configures different CSI-RSs for the multiple RRU merging cells, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RSs, the base station can obtain the RSRP of each RRU, and the original multiple RRU merging cell can be adjusted to be a new multiple RRU merging cell according to the RSRP of each RRU in the multiple RRU merging cells and the adjacent cell, and the optimal interference suppression effect and other effects can be achieved.
Example 2
An embodiment of the present invention provides a device for measuring reference signal received power, where the device may be a base station, as shown in fig. 5, and the device includes: a configuration unit 501, a sending unit 502 and an obtaining unit 503;
a configuration unit 501, configured to configure CSI-RS at different time-frequency positions for multiple RRU combining cells or each RRU in the multiple RRU combining cells and their neighboring cells;
the configuration unit 501 may configure different CSI-RS for different RRUs in a multi-RRU combining cell, where the different CSI-RS refer to different time and frequency positions of the CSI-RS, and the time and frequency positions refer to resource positions where resources in a time dimension and resources in a frequency dimension intersect. The resources in the time dimension may be different transmission time intervals, TTIs, and the resources in the frequency dimension may be different physical resource blocks, PRBs. Specifically, when the configuration unit 501 configures the CSI-RS for each RRU, it is only required to ensure that the CSI-RS of each RRU in the multi-RRU combining cell is different, and therefore, the CSI-RS can be determined for each RRU by configuring the CSI-RS according to the different configurations of the CSI-RS specified in the communication protocol.
A sending unit 502, configured to send each CSI-RS to a UE, so that the UE measures RSRP according to a time-frequency location of each CSI-RS;
specifically, the sending unit 502 sends CSI-RS configured for each RRU in the multiple-RRU combining cell or the multiple-RRU combining cell and the neighboring cell to the UE.
The sending unit 502 issues CSI-RS configured for each RRU in a multi-RRU combining cell and an adjacent cell to the UE, where the multi-RRU combining cell and the adjacent cell belong to the same CoMP management set, the multi-RRU combining cell is used as the local cell, the adjacent cell is a cell directly adjacent to the local cell, the CoMP management set may include at most 8 measurement targets, and the measurement target may be a cell or an RRU.
The transmitting unit 502 may transmit the respective CSI-RSs to the UE through transmission of the RRC connection reconfiguration message.
RSRP is one of the key parameters that can represent radio signal strength in LTE networks, being the average of the received signal power over all resource elements RE that carry reference signals within a certain symbol.
An obtaining unit 503, configured to receive each CSI-RS reported by the UE and an RSRP corresponding to each CSI-RS, and obtain an RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cells.
Further, as shown in fig. 6, the obtaining unit 503 is configured to: the obtaining module 5032 is configured to obtain RSRPs of RRU combining cells or RRUs in the RRU combining cells and neighboring cells thereof according to different CSI-RSs configured for each RRU in the RRU combining cells and RSRPs corresponding to each CSI-RS.
Further, as shown in fig. 6, when the base station configures different CSI-RSs for each RRU in the multi-RRU combining cell, the apparatus further includes: a first processing unit 504, a first setup module 5041, a second setup module 5042;
the first processing unit 504 is configured to adjust downlink transmission power of at least one RRU in the multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell.
Specifically, the first setting module 5041 in the first processing unit 504 is configured to set an output power adjustment value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits using the adjusted downlink power;
the RRU output power adjustment value is a bias that increases or decreases by several dB based on the RRU transmit power. For example, in a scenario where there is a handover coverage, i.e., the UE is in the coverage area of CELL1, but the CELL2 signal is relatively strong in the coverage area of CELL1, so that the UE resides in CELL2, the transmit power of the RRU that determines the RSRP setting in CELL2 is too large is reduced, so that the handover coverage situation is eliminated.
A second setting module 5042 in the first processing unit 504 is configured to set a downlink power configuration value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits with the configured downlink power. Under the scene of pilot pollution, the downlink power of at least one RRU is set according to the level of the RRUs by obtaining the RSRP of each RRU in each multi-RRU combined cell, so that one cell is a main pilot, the UE can stably reside in the cell, and the pilot pollution is eliminated.
Further, as shown in fig. 6, when the base station configures different CSI-RSs for each RRU in the multi-RRU combining cell and its neighboring cells, the apparatus further includes: a second processing unit 505;
a second processing unit 505, configured to adjust the multi-RRU combining cell to a new multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell and its neighboring cell, where the new multi-RRU combining cell includes part or all of the RRUs in the multi-RRU combining cell, and includes part or all of the RRUs in the neighboring cell of the multi-RRU combining cell.
The embodiment of the invention provides a device for measuring reference signal receiving power, which is used for configuring CSI-RS (channel state information-reference signals) of different time frequency positions for a plurality of RRU (radio remote unit) combined cells or each RRU in the plurality of RRU combined cells and adjacent cells thereof through a configuration unit; a sending unit, configured to send each CSI-RS to a UE, so that the UE measures RSRP according to a time-frequency location of each CSI-RS; and an obtaining unit, configured to receive each CSI-RS reported by the UE and an RSRP corresponding to each CSI-RS, and obtain an RSRP of each RRU in a multi-RRU combining cell or the multi-RRU combining cell and its neighboring cells. According to the scheme provided by the embodiment of the invention, different CSI-RSs can be configured for each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RSs, and the reference signal receiving power of each RRU can be obtained.
An embodiment of the present invention provides a base station, as shown in fig. 7, where the base station includes: a processor 701, a transmitter 702, a receiver 703;
a processor 701, configured to configure CSI-RSs at different time-frequency positions for multiple RRU combining cells or each RRU in the multiple RRU combining cells and their neighboring cells;
a transmitter 702, configured to send each CSI-RS to a UE, so that the UE measures RSRP according to a time-frequency location of each CSI-RS;
a receiver 703, configured to receive each CSI-RS reported by the UE and an RSRP corresponding to each CSI-RS; the processor 701 is configured to obtain RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cell.
Further, when the processor 701 obtains RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cell, the processor 701 is specifically configured to: and acquiring the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof according to different CSI-RSs configured for each RRU in the multi-RRU merging cell and the RSRP corresponding to each CSI-RS.
Further, when the base station configures different CSI-RSs for each RRU in the multi-RRU combining cell, the processor 701 is further configured to adjust downlink transmission power of at least one RRU in the multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell.
Specifically, the processor 701 sets an output power adjustment value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits using the adjusted downlink power; or, the processor 701 sets a downlink power configuration value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits with the configured downlink power.
The RRU output power adjustment value is a bias that increases or decreases by several dB based on the RRU transmit power. For example, in a scenario where there is a handover coverage, i.e., the UE is in the coverage area of CELL1, but the CELL2 signal is relatively strong in the coverage area of CELL1, so that the UE resides in CELL2, the transmit power of the RRU that determines the RSRP setting in CELL2 is too large is reduced, so that the handover coverage situation is eliminated.
Under the scene of pilot pollution, the downlink power of at least one RRU is set according to the level of the RRUs by obtaining the RSRP of each RRU in each multi-RRU combined cell, so that one cell is a main pilot, the UE can stably reside in the cell, and the pilot pollution is eliminated.
Further, when the base station configures CSI-RSs with different time-frequency positions for each RRU in the multi-RRU combining cell and its neighboring cell, the processor 701 is further configured to adjust the multi-RRU combining cell to a new multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell and its neighboring cell, where the new multi-RRU combining cell includes part or all of the RRUs in the multi-RRU combining cell and includes part or all of the RRUs in the neighboring cell of the multi-RRU combining cell.
The embodiment of the invention provides a base station, which is characterized in that a processor is used for configuring CSI-RS (channel state information-reference signals) of different time frequency positions for a multi-RRU merging cell or each RRU in the multi-RRU merging cell and a cell adjacent to the multi-RRU merging cell; the transmitter sends each CSI-RS to the UE so that the UE can measure RSRP according to the time-frequency position of each CSI-RS; and the receiver receives each CSI-RS reported by the UE and the RSRP corresponding to each CSI-RS, and the processor acquires the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof. According to the scheme provided by the embodiment of the invention, different CSI-RSs can be configured for each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RSs, and the reference signal receiving power of each RRU can be obtained.
It should be noted that the above-described device embodiments are merely illustrative, where 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 multiple 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.
From the above description of the embodiments, those skilled in the art will clearly understand that the present invention can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the apparatus and system embodiments are substantially similar to the method embodiments and are therefore described in a relatively simple manner, where relevant, reference may be made to some descriptions of the method embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for measuring reference signal received power, comprising:
a base station configures channel state information reference signals (CSI-RS) of different time frequency positions for each RRU in a multi-RRU merging cell or the multi-RRU merging cell and adjacent cells thereof;
the base station sends each CSI-RS to User Equipment (UE), so that the UE measures Reference Signal Received Power (RSRP) according to the time-frequency position of each CSI-RS;
and the base station receives each CSI-RS reported by the UE and the RSRP corresponding to each CSI-RS, and acquires the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof.
2. The method of claim 1, wherein the base station obtaining the RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cells comprises:
the base station acquires the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof according to different CSI-RSs configured for each RRU in the multi-RRU merging cell and the RSRP corresponding to each CSI-RS.
3. The method of claim 1, wherein after the base station obtains the RSRP of each RRU in the multi-RRU combining cell, the method further comprises:
and the base station adjusts the downlink transmission power of at least one RRU in the multi-RRU merging cell according to the obtained RSRP of each RRU in the multi-RRU merging cell.
4. The method of claim 3, wherein the base station adjusting the downlink transmission power of at least one RRU in the multi-RRU combining cell comprises:
the base station sets an output power adjustment value of at least one RRU in the multi-RRU combined cell so that the at least one RRU transmits by adopting the adjusted downlink power; or,
and the base station sets a downlink power configuration value of at least one RRU in the multi-RRU combined cell so that the at least one RRU adopts the configured downlink power to transmit.
5. The method of claim 1, wherein after acquiring the RSRP of each RRU in the multi-RRU combining cell and its neighboring cells, the base station further comprises:
and according to the obtained RSRP of each RRU in the multi-RRU merging cell and the adjacent cell thereof, the base station adjusts the multi-RRU merging cell into a new multi-RRU merging cell, wherein the new multi-RRU merging cell comprises part or all RRUs in the multi-RRU merging cell and part or all RRUs in the adjacent cell of the multi-RRU merging cell.
6. An apparatus for measuring a reference signal received power, comprising:
a configuration unit, configured to configure CSI-RS at different time-frequency positions for multiple RRU combining cells or each RRU in the multiple RRU combining cells and their neighboring cells;
a sending unit, configured to send each CSI-RS to a UE, so that the UE measures RSRP according to a time-frequency location of each CSI-RS;
an obtaining unit, configured to receive each CSI-RS reported by the UE and an RSRP corresponding to each CSI-RS, and obtain an RSRP of each RRU in the multi-RRU combining cell or the multi-RRU combining cell and its neighboring cells.
7. The apparatus of claim 6, wherein the obtaining unit is configured to:
and acquiring the RSRP of each RRU in the multi-RRU merging cell or the multi-RRU merging cell and the adjacent cell thereof according to different CSI-RSs configured for each RRU in the multi-RRU merging cell and the RSRP corresponding to each CSI-RS.
8. The apparatus of claim 6, further comprising:
the first processing unit is configured to adjust downlink transmission power of at least one RRU in the multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell.
9. The apparatus of claim 8, wherein the first processing unit comprises:
a first setting module, configured to set an output power adjustment value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits using the adjusted downlink power; or,
a second setting module, configured to set a downlink power configuration value of at least one RRU in the multi-RRU combining cell, so that the at least one RRU transmits using the configured downlink power.
10. The apparatus of claim 6, further comprising:
and a second processing unit, configured to adjust the multi-RRU combining cell to a new multi-RRU combining cell according to the obtained RSRP of each RRU in the multi-RRU combining cell and its neighboring cell, where the new multi-RRU combining cell includes part or all of the RRUs in the multi-RRU combining cell, and includes part or all of the RRUs in the neighboring cell of the multi-RRU combining cell.
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| PCT/CN2013/078726 WO2014059799A1 (en) | 2012-10-15 | 2013-07-03 | Method and device for measuring reference signal receiving power |
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| CN109587691B (en) * | 2017-09-28 | 2022-03-04 | 中国移动通信集团浙江有限公司 | Power adjustment method and system for cell distribution |
| CN109672496A (en) * | 2017-10-16 | 2019-04-23 | 上海华为技术有限公司 | A kind of method and device of data processing |
| CN109672496B (en) * | 2017-10-16 | 2021-08-20 | 上海华为技术有限公司 | Data processing method and device |
| CN108135007A (en) * | 2018-02-11 | 2018-06-08 | 京信通信系统（中国）有限公司 | A kind of method and device of communication |
| CN111970707A (en) * | 2019-05-20 | 2020-11-20 | 成都鼎桥通信技术有限公司 | PDT (PDT) sector merging method and dual-mode base station |
| WO2021248384A1 (en) * | 2020-06-10 | 2021-12-16 | Oppo广东移动通信有限公司 | Measurement method and apparatus |
| WO2024108533A1 (en) * | 2022-11-25 | 2024-05-30 | 深圳市运联通通信服务有限公司 | Signal processing method and apparatus, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014059799A1 (en) | 2014-04-24 |
| JP2015505181A (en) | 2015-02-16 |
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