CN102916754A - Method and device for measuring reference signal receiving power - Google Patents

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

Method and device for measuring received power of a reference signal

technical field

The present invention relates to the technical field of communication networks, in particular to a method and device for measuring received power of a reference signal.

Background technique

At present, the problem of mutual interference between cells can be solved by combining radio remote unit (Radio Remote Unit, RRU) cells. Multiple RRUs can be combined into one cell in the following two ways: first, multiple RRUs with the same channel are combined into one cell, which can be called a single frequency network (Single Frequency Network, SFN) cell; second, by The RRUs of N channels and the RRUs of M channels are combined into one cell, which may be called an N+M cell.

When measuring the downlink reference signal receiving power (Reference Signal Receiving Power, RSRP) of a multi-RRU merged cell, the RSRP is usually measured according to the cell-specific reference signals (CRS), and the cell-level downlink RSRP of the cell can be obtained , that is, the total reference signal received power after combining multiple RRU signals in the cell.

However, when using the existing technology to measure the received power of the reference signal, only the received power of multiple RRU signals combined can be obtained. In this way, when multiple RRUs are merged and the cell is over-covered, the downlink reference signal received by each RRU cannot be obtained. As a result, the power cannot be set for the RRU with over-area coverage.

Contents of the invention

The invention provides a method and device for measuring the received power of a reference signal, which can acquire the received power of a reference signal of each RRU.

In a first aspect, the present invention provides a method for measuring the received power of a reference signal, including:

The base station configures the channel state information reference signal (Channel State Information-Reference Symbol, CSI-RS) of different time-frequency positions for the multi-radio remote unit RRU merged cell or the multi-RRU merged cell and each RRU in the adjacent cell;

The base station sends each of the CSI-RSs to a user equipment (User Equipment, UE), so that the UE measures a reference signal received power RSRP according to the time-frequency position of each of the CSI-RSs;

The base station receives each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS, and obtains the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells .

In a first possible implementation manner, in combination with the first aspect, obtaining the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells by the base station includes:

According to the different CSI-RS configured for each RRU in the multi-RRU combined cell and the RSRP corresponding to each of the CSI-RS, the base station acquires the multi-RRU combined cell or each of the multi-RRU combined cell and its adjacent cells RRU's RSRP.

In the second possible implementation manner, in combination with the first aspect, after the base station obtains the RSRP of each RRU in the multi-RRU merged cell, it further includes:

According to the acquired RSRP of each RRU in the multi-RRU combined cell, the base station adjusts the downlink transmit power of at least one RRU in the multi-RRU combined cell.

In a third possible implementation manner, in combination with the second possible implementation manner in the first aspect, adjusting the downlink transmit power of at least one RRU in the multi-RRU merged cell by the base station includes:

The base station sets the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted downlink power to transmit; or,

The base station sets a downlink power configuration value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the configured downlink power for transmission.

In a fourth possible implementation manner, in combination with the first aspect, after the base station acquires the RSRP of each RRU in the multi-RRU merged cell and its neighboring cells, the base station further includes:

According to the acquired RSRP of each RRU in the multi-RRU combined cell and its adjacent cells, the base station adjusts the multi-RRU combined cell to a new multi-RRU combined cell, and the new multi-RRU combined cell includes the multi-RRU Merge part or all of the RRUs in the cell, and include part or all of the RRUs in the neighboring cells of the multi-RRU merged cell.

In a second aspect, the present invention provides a device for measuring the received power of a reference signal, comprising:

A configuration unit, configured to configure CSI-RSs at different time-frequency positions for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells;

a sending unit, configured to send each of the CSI-RSs to a user equipment UE, so that the UE measures a Reference Signal Received Power RSRP according to the time-frequency position of each of the CSI-RSs;

an acquiring unit, configured to receive each of the CSI-RSs reported by the UE and the RSRP corresponding to each of the CSI-RSs, and acquire the multiple RRU combined cell or the multiple RRU combined cell and its neighboring cells RSRP of each RRU.

In a first possible implementation manner, in combination with the second aspect, the acquiring unit is configured to:

According to the different CSI-RS configured for each RRU in the multi-RRU combined cell, and the RSRP corresponding to each of the CSI-RSs, obtain the multi-RRU combined cell or the RSRP of each RRU in the multi-RRU combined cell and its neighboring cells .

In a second possible implementation manner, with reference to the second aspect, the device further includes:

The first processing unit is configured to adjust the downlink transmit power of at least one RRU in the multi-RRU combined cell according to the acquired RSRP of each RRU in the multi-RRU combined cell.

In a third possible implementation manner, in combination with the second possible implementation manner in the second aspect, the first processing unit includes:

A first setting module, configured to set the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted downlink power for transmission; or,

The second setting module is configured to set a downlink power configuration value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the configured downlink power for transmission.

In a fourth possible implementation manner, in combination with the second aspect, the device further includes:

The second processing unit is configured to adjust the multi-RRU combined cell to a new multi-RRU combined cell according to the obtained RSRP of each RRU in the multi-RRU combined cell and its neighboring cells, and the new multi-RRU combined cell includes Part or all of the RRUs in the multi-RRU combined cell include part or all of the RRUs in a neighboring cell of the multi-RRU combined cell.

The embodiments of the present invention provide a method and device for measuring the received power of a reference signal. The base station configures CSI-RSs with different time-frequency positions for each RRU in a multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells; The base station sends each of the CSI-RSs to the UE, so that the UE measures RSRP according to the time-frequency position of each of the CSI-RSs; the base station receives each of the CSI-RSs reported by the UE and The RSRP corresponding to the CSI-RS, and obtain the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells.

Compared with the measurement of reference signal received power in the prior art, only the received power of multiple RRU signals combined can be obtained. In this way, when multiple RRUs are combined for cell overlay, since the downlink reference signal received power of each RRU cannot be obtained , resulting in the inability to perform power setting for RRUs with over-area coverage, the solution provided by the embodiments of the present invention can configure different CSI-RS for each RRU in the multi-RRU combined cell or the multi-RRU combined , so that the terminal measures the RSRP according to the time-frequency position of the CSI-RS, so as to obtain the reference signal received power of each RRU.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flow chart of a method for measuring the received power of a reference signal provided in Embodiment 1 of the present invention;

FIG. 2 is a flow chart of another method for measuring the received power of a reference signal provided in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of handoff coverage provided by Embodiment 1 of the present invention;

FIG. 4 is a flow chart of another method for measuring the received power of a reference signal provided in Embodiment 1 of the present invention;

FIG. 5 is a block diagram of another device for measuring the received power of a reference signal provided in Embodiment 2 of the present invention;

FIG. 6 is a block diagram of another device for measuring received power of a reference signal provided in Embodiment 2 of the present invention;

FIG. 7 is a block diagram of another base station provided by Embodiment 2 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Example 1

An embodiment of the present invention provides a method for measuring the received power of a reference signal. The execution subject of the method is a base station. As shown in FIG. 1 , the method includes:

Step 101, the base station configures the channel state information reference signal CSI-RS at different time-frequency positions for the multi-radio remote unit RRU combined cell or each RRU in the multi-RRU combined cell and its adjacent cells;

The RRU is a radio remote unit, which means that the radio frequency unit is pulled to the remote coverage target area through the optical fiber, and the baseband signal is transmitted in the optical fiber. The baseband processing unit (Building Baseband Unite, BBU) is centrally placed in the computer room, the RRU can be installed at the antenna end, and one BBU can support multiple RRUs.

Because the distance between base stations is too small, it is difficult to solve the interference between cells by adjusting the downtilt angle of the antenna, so the technology of combining multiple RRUs into cells is introduced. Among them, multiple RRUs are merged into a cell, that is, the whole cell transmits, and the sub-sectors (coverage areas) receive. Divide the coverage of a cell into multiple sectors or small coverage areas, each sector or small coverage area is received by different receiving antennas, and the transmitted signals of all sectors or coverage areas are the same. In the uplink direction, the signals received by multiple RRUs are respectively sent to the BBU for processing. In the downlink direction, the generated downlink signals are copied into multiple copies and sent to each RRU, so as to realize the effect of the whole cell mode.

Step 102, the base station sends each of the CSI-RSs to a user equipment UE, so that the UE measures a Reference Signal Received Power (RSRP) according to the time-frequency position of each of the CSI-RSs;

The base station can allocate different CSI-RSs to different RRUs and send them to the UE. Wherein, the time-frequency positions of the CSI-RS corresponding to different RRUs are different.

RSRP is one of the key parameters that can represent wireless signal strength in an LTE network, and it is the average value of signal power received on all resource elements (Resource Element, RE) that carry reference signals within a certain symbol.

In the prior art, when measuring the downlink signal strength of a cell, the RSRP is usually measured according to the CRS, but the RSRP measured in the prior art is in units of a cell, that is, the superposition value of the total downlink RSRP of multiple RRUs in the cell. In the present invention, the base station configures different CSI-RSs for each RRU, so that the UE can measure the RSRP through the time-frequency position of the CSI-RS, and can obtain the RSRP of each RRU under the cell, that is, obtain the downlink RSRP of the RRU level.

Step 103, the base station receives each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS, and obtains the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells The RSRP of each RRU.

In this step, the base station obtains the RSRP of each RRU through internal mapping. Specifically, the base station obtains the multi-RRU combination according to the different CSI-RS configured for each RRU in the multi-RRU combination cell and the RSRP corresponding to each said CSI-RS. The RSRP of each RRU in the cell or the combined multi-RRU cell and its neighboring cells.

An embodiment of the present invention provides a method for measuring the received power of a reference signal. By configuring different CSI-RSs for each RRU in a multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells, the terminal can use the CSI-RS RSRP is measured at the time-frequency position of each RRU, so as to obtain the reference signal received power of each RRU.

The present invention provides another method for measuring the received power of a reference signal, as shown in Figure 2, the method includes:

Step 201, the base station configures channel state information reference signals CSI-RS at different time-frequency positions for each RRU in the multi-radio remote unit RRU merged cell;

The base station can configure CSI-RSs with different time-frequency positions for different RRUs in a multi-RRU merged cell, where different CSI-RSs mean that the time-frequency positions of the CSI-RS are different, and the time-frequency positions refer to resources in the time dimension and resources in the frequency dimension The resource location where the resource intersects. The resources in the time dimension can be different transmission time intervals (Transmission Time Interval, TTI), and the resources in the frequency dimension can be different physical resource blocks (Physical Resource Block, PRB). Specifically, when the base station configures CSI-RS for each RRU, it only needs to ensure that the CSI-RS of each RRU in the multi-RRU merged cell is different. -RS will do.

Step 202, the base station sends each of the CSI-RS to the user equipment UE, so that the UE measures the reference signal received power RSRP according to the time-frequency position of each CSI-RS;

In this step, the base station can send each CSI-RS to the UE by sending a radio resource control (Radio Resource Control, RRC) connection reconfiguration message.

RSRP is one of the key parameters that can represent wireless signal strength in an LTE network, and it is the average value of signal power received on all resource elements (Resource Element, RE) 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 the 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, and according to the period and offset corresponding to the queried CSI-RS The offset calculates the time-frequency position of the CSI-RS, and the UE measures the RSRP at the calculated time-frequency position of the CSI-RS.

Step 204, the UE reports each of the CSI-RSs and the measured RSRPs corresponding to each RRU to the base station;

Optionally, the UE may report each of the CSI-RSs and the measured RSRPs corresponding to each RRU to the base station in the form of a CSI-RS RSRP measurement report. That is, when the difference between the CSI-RS RSRP of an adjacent RRU measured by the UE and the CSI-RS RSRP of the RRU is higher than the preset threshold, the report of the CSI-RS RSRP measurement report is triggered, wherein the RRU can be For any RRU in the multi-RRU merged cell, its adjacent RRU may be the RRU directly adjacent to this RRU, and its adjacent RRU is also an RRU in the multi-RRU merged cell; the preset threshold can be set according to experience. The CSI-RS RSRP measurement report includes the CSI-RS of this RRU, the CSI-RS RSRP of this RRU, the CSI-RS of each RRU adjacent to this RRU, and the CSI-RS RSRP of each RRU adjacent to this RRU .

In addition, when the UE reports each of the CSI-RSs and the measured RSRPs corresponding to each RRU to the base station, other methods may be used, such as setting a timer. The above CSI-RS and the RSRP corresponding to each measured RRU. That is to say, the embodiment of the present invention does not limit the reporting manner of the UE.

Step 205, the base station receives each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS, and acquires the RSRP of each RRU in the multi-RRU merged cell;

In this step, the base station obtains the RSRP of each RRU through internal mapping according to the received CSI-RS reported by the UE and the RSRP corresponding to each CSI-RS. Specifically, the base station performs mapping according to the different CSI-RS configured for each RRU in the multi-RRU merged cell in step 201, and the received RSRP corresponding to each CSI-RS reported by the UE, to obtain multiple The RRU merges the RSRP of each RRU in the cell.

Step 206, according to the acquired RSRP of each RRU in the multi-RRU combined cell, the base station adjusts the downlink transmit power of at least one RRU in the multi-RRU combined cell.

In this embodiment, as shown in FIG. 3, although the UE is in the coverage area of cell CELL1, wherein the coverage area of CELL1 is indicated by a black line box, the signal of CELL2 in the coverage area of CELL1 is relatively strong, so that the UE camps on In CELL2, because in the prior art, when measuring the downlink signal strength, only the RSRP at the cell level can be obtained, and the RSRP of each RRU in the cell cannot be obtained. Therefore, in the coverage area of CELL1, it can only be known that the downlink signal of CELL2 is strong, and there is over-area coverage , but it is impossible to know specifically which RRU power setting in CELL2 is larger, so specific adjustments cannot be made.

In addition, there is another situation. In a multi-RRU merged 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 a strong enough dominant pilot to make it reside stably. That is to say, the downlink signal strength of each multi-RRU merged cell is similar, so that the UE cannot stably reside in a certain cell. Because in the prior art, when measuring the downlink signal strength, only the RSRP at the cell level can be obtained, and the RSRP of each RRU in the cell cannot be obtained. Therefore, even if we know that some cells with multiple RRUs merged before the signal is close and there is pilot pollution, but it is not clear. Adjust the downlink power setting of which RRU, so specific adjustments cannot be made.

Therefore, in this embodiment, according to the RSRP of each RRU in the multi-RRU merged cell, it is determined that the RSRP setting of a certain RRU in CELL2 is too large in the scenario where there is over-area coverage, resulting in over-area coverage in CELL2. At this time, you can adjust CELL2 RSRP is set too large RRU. In addition, in the scenario where there is pilot pollution, the downlink power of at least one RRU can be set according to the RSRP of at least one RRU in the multi-RRU combined cell, so as to avoid pilot pollution in the multi-RRU combined cell.

Specifically, in this step, the downlink power setting of the RRU can be set in the following two ways: first, the base station sets the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted output power downlink power for transmission;

This method is to set the existing parameters, that is, to set according to the existing parameter cell ID->cabinet->frame->slot->RRU output power adjustment value, wherein, the cabinet is a parameter in the cell ID, and the frame It is a parameter in the cabinet, and the slot is a parameter in the frame. Set the parameter in the slot: RRU output power adjustment value. The RRU output power adjustment value is an offset that increases or decreases several dB based on the RRU transmit power. For example, in a scenario where there is crossover coverage, the transmission power of the RRU whose RSRP setting in CELL2 is determined to be too large is reduced, so as to eliminate the crossover coverage situation.

Second, the base station sets the downlink power configuration value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the configured downlink power for transmission.

This method is to set new parameters, that is, set according to the cell ID->the number of RRUs in the cell->cabinet->frame->slot->downlink power configuration of each RRU level, that is, to reconfigure the downlink power of each RRU in the cell set up. It should be noted that when the cell is a multi-RRU merged cell, the newly added "downlink power configuration at each RRU level" parameter takes effect; when the cell is a normal cell, the newly added "downlink power configuration at each RRU level" parameter is invalid , still using the original implementation. The "downlink power configuration" value here is the power of the cell-specific reference signal (Cell-specific Reference Signal, CRS) pilot signal of each cell, which can be understood as the transmit power of the cell on the base station side. For example, in the scenario where there is pilot pollution, by obtaining the RSRP of at least one RRU in each multi-RRU merged cell, the downlink power of at least one RRU is set for the RRU level, so that one of the cells is the dominant pilot, so that the UE can Stay in this cell stably, thereby eliminating pilot pollution.

The embodiment of the present invention provides a method for measuring the received power of a reference signal. The base station configures CSI-RS with different time-frequency positions for a multi-RRU merged cell, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RS, so that the base station can The RSRP of each RRU is obtained, and the power can be adjusted according to the RSRP of each RRU, so that the situation of over-area coverage and pilot pollution can be avoided.

An embodiment of the present invention provides another method for measuring the received power of a reference signal, as shown in FIG. 4 , the method includes:

Step 401, the base station configures the channel state information reference signal CSI-RS at different time-frequency positions for each RRU in the multi-RRU merged cell and its adjacent cells;

Step 402, the base station sends each of the CSI-RS to the user equipment UE, so that the UE measures the reference signal received power RSRP according to the time-frequency position of each CSI-RS;

In this step, the base station sends the CSI-RS configured for each RRU in the multi-RRU combined cell and adjacent cells to the UE, where the multi-RRU combined cell and the adjacent cells belong to the same Coordinated Multiple Points Transmission/Reception (Coordinated Multiple Points Transmission/Reception) , CoMP) management set, the multi-RRU merged cell is used as the current cell, and its neighbor cells are the cells directly adjacent to the current cell. The CoMP management set can include a maximum of 8 measurement targets, and the measurement targets can be cells or RRUs.

Step 403, the UE receives the CSI-RS configured for each RRU sent by the base station, and measures the RSRP according to the time-frequency position of the CSI-RS;

Step 404, the UE reports each of the CSI-RSs and the measured RSRP corresponding to each RRU in the multi-RRU merged cell and its neighboring cells to the base station;

Optionally, the UE may report each of the CSI-RSs and the measured RSRPs corresponding to each RRU to the base station in the form of a CSI-RS RSRP measurement report. That is, when the difference between the CSI-RS RSRP of an adjacent RRU measured by the UE and the CSI-RS RSRP of the RRU is higher than the preset threshold, the report of the CSI-RS RSRP measurement report is triggered, wherein the RRU can be For any RRU in the multi-RRU merged cell, its adjacent RRU may be the RRU directly adjacent to this RRU, and its adjacent RRU is also an RRU in the multi-RRU merged cell; the preset threshold can be set according to experience. The CSI-RS RSRP measurement report includes the CSI-RS of this RRU, the CSI-RS RSRP of this RRU, the CSI-RS of each RRU adjacent to this RRU, and the CSI-RS RSRP of each RRU adjacent to this RRU .

In addition, when the UE reports each of the CSI-RSs and the measured RSRPs corresponding to each RRU to the base station, other methods may be used, such as setting a timer. The above CSI-RS and the RSRP corresponding to each measured RRU. That is to say, the embodiment of the present invention does not limit the reporting manner of the UE.

Step 405, the base station receives each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS in the multi-RRU combined cell and its adjacent cells, and obtains each of the multi-RRU combined cell and its adjacent cells RRU's RSRP;

In this embodiment, steps 401-405 are the same as the operations of steps 201-205 in accompanying drawing 2. The difference is that in accompanying drawing 2, only the processing based on one multi-RRU merging cell is performed, and accompanying drawing 4 is based on a The processing of multiple RRU merged cells and their neighboring cells, but the specific processing methods are the same. For details, please refer to the description of the operations of steps 201 to 205 in FIG. 2 , which will not be repeated here.

Step 406, according to the obtained RSRP of each RRU in the multi-RRU combined cell and its neighboring cells, the base station adjusts the multi-RRU combined cell to a new multi-RRU combined cell;

Wherein, the new multi-RRU combined cell includes part or all of the RRUs in the multi-RRU combined cell, and includes part or all of the RRUs in the adjacent cells of the multi-RRU combined cell.

In this embodiment, due to the fact that in the late stage of network planning, the existing network has completed the network construction of multiple RRU merged cells, but due to long-term parameter settings, radio frequency (Radio Frequency, RF) optimization and other work, some RRUs were merged into one The scheme of the cell is no longer optimal, that is, some original RRUs are merged into one cell and can no longer achieve optimal effects such as interference suppression. However, the existing technology can only obtain the RSRP at the cell level. If it is false to re-plan the multi-RRU merged cell, the existing multi-RRU merged cell can only be split into ordinary cells, and then the RSRP of a common cell can be obtained again. Then, according to the network planning tool, the optimal new multi-RRU merging cell merging scheme is obtained, that is, which RRUs are selected to be merged into one cell. This method is basically necessary for such a large operation when the network deployment is basically fixed in the later stage of network construction. Impossible, and there is a lot of work.

Therefore, using the solution provided in this embodiment, according to the obtained RSRP of each RRU in the multi-RRU combined cell and its adjacent cells, and the implementation method of the network planning tool, the multi-RRU combined cell can be adjusted to a new multi-RRU combined cell , to achieve the best effect of interference suppression.

Among them, the implementation method of the network planning tool is: input information such as the multi-RRU merged cell parameter table, the list of neighboring cells, and the RSRP of the neighboring cells into the network planning tool, and give various information according to the distance between base stations and the list of neighboring cells Single frequency network (Single Frequency Network, SFN) merged cell combination, according to various SFN combined cell combinations, through the RSRP measurement value of each RRU in each cell, the signal and interference plus noise of the entire network after using a certain SFN combination Ratio (Signal to Interference plus NoiseRatio, SINR), and finally obtain the largest SINR, that is, the SFN combination with the least interference is the new multi-RRU merged cell.

Among them, multiple RRUs can be combined into one cell in the following two ways: first, multiple RRUs with the same channel can be combined into one cell, which can be called an SFN cell; second, RRUs with N channels and M channels The RRUs are combined into one cell, which may be called an N+M cell.

The embodiment of the present invention provides a method for measuring the received power of a reference signal. The base station configures different CSI-RSs for the multi-RRU merged cell, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RS, so that the base station can obtain each RRU. RSRP, and the original multi-RRU combined cell can be adjusted to a new multi-RRU combined cell according to the RSRP of the multi-RRU combined cell and each RRU in the neighboring cell, so as to achieve optimal interference suppression and other effects.

Example 2

An embodiment of the present invention provides a device for measuring received power of a reference signal. The device may be a base station. As shown in FIG. 5 , the device includes: a configuration unit 501, a sending unit 502, and an acquisition unit 503;

The configuration unit 501 is configured to configure CSI-RSs of different time-frequency positions for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells;

The configuration unit 501 can configure different CSI-RSs for different RRUs in a multi-RRU merged cell, where different CSI-RSs mean that the time-frequency positions of the CSI-RS are different, and the time-frequency positions refer to resources in the time dimension and resources in the frequency dimension The resource location where the resource intersects. 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 only needs to ensure that the CSI-RS of each RRU in the multi-RRU merged cell is different. Just confirm the CSI-RS.

A sending unit 502, configured to send each of the CSI-RSs to a UE, so that the UE measures RSRP according to the time-frequency position of each of the CSI-RSs;

Specifically, the sending unit 502 will send the CSI-RS configured for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and adjacent cells to the UE.

The sending unit 502 sends the CSI-RS configured for each RRU in the multi-RRU combined cell and neighboring cells to the UE, where the multi-RRU combined cell and the neighboring cells belong to the same CoMP management set, and the multi-RRU combined cell is used as the current cell, and its neighboring cells For a cell directly adjacent to the current cell, the CoMP management set can include a maximum of 8 measurement targets, and the measurement target can be a cell or an RRU.

The sending unit 502 can send each CSI-RS to the UE by sending an RRC connection reconfiguration message.

RSRP is one of the key parameters that can represent wireless signal strength in an LTE network, and is the average value of signal power received on all resource elements RE that carry reference signals within a certain symbol.

The obtaining unit 503 is configured to receive each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS, and obtain the multiple RRU combined cell or the multiple RRU combined cell and its neighboring cells The RSRP of each RRU.

Further, as shown in FIG. 6, the obtaining unit 503 is configured to: according to the different CSI-RS configured for each RRU in the multi-RRU merged cell, and the RSRP corresponding to each CSI-RS, the obtaining module 5032 is used to obtain The multi-RRU combined cell or the RSRP of each RRU in the multi-RRU combined cell and its adjacent cells.

Further, as shown in FIG. 6, when the base station configures different CSI-RSs for each RRU in a multi-RRU merged cell, the device further includes: a first processing unit 504, a first setting module 5041, a second Setup module 5042;

Wherein, the first processing unit 504 is configured to adjust the downlink transmit power of at least one RRU in the multi-RRU combined cell according to the acquired RSRP of each RRU in the multi-RRU combined cell.

Specifically, the first setting module 5041 in the first processing unit 504 is configured to set the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted downlink power launch;

The RRU output power adjustment value is an offset that increases or decreases several dB based on the RRU transmit power. For example, in a scenario where there is cross-area coverage, that is, although the UE is in the coverage area of CELL1, the signal of CELL2 in the coverage area of CELL1 is relatively strong, so that the UE resides in CELL2. The transmission power of the large RRU makes it possible to eliminate the situation of over-area coverage.

The second setting module 5042 in the first processing unit 504 is configured to set the downlink power configuration value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the configured downlink power for transmission. In the scenario of pilot pollution, by obtaining the RSRP of each RRU in each multi-RRU merged cell, set the downlink power of at least one RRU for the RRU level, so that one of the cells is the dominant pilot, so that the UE can camp on stably In this cell, thereby eliminating pilot pollution.

Further, as shown in FIG. 6, when the base station configures different CSI-RSs for each RRU in the multi-RRU merged cell and its neighboring cells, the device further includes: a second processing unit 505;

The second processing unit 505 is configured to adjust the multi-RRU combined cell to a new multi-RRU combined cell according to the obtained RSRP of each RRU in the multi-RRU combined cell and its adjacent cells, and the new multi-RRU combined cell It includes part or all of the RRUs in the multi-RRU combined cell, and includes part or all of the RRUs in a neighboring cell of the multi-RRU combined cell.

An embodiment of the present invention provides a reference signal received power measurement device, which is used to configure a CSI-RS with different time-frequency positions for each RRU in a multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells through a configuration unit. a sending unit, configured to send each of the CSI-RSs to a UE, so that the UE measures RSRP according to the time-frequency position of each of the CSI-RSs; an acquiring unit, configured to receive each of the CSIs reported by the UE - RSs and RSRPs corresponding to each of the CSI-RSs, and acquiring the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells. The solution provided by the embodiment of the present invention can configure different CSI-RS for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RS, Thus, the reference signal received power of each RRU is obtained.

An embodiment of the present invention provides a base station. As shown in FIG. 7 , the base station includes: a processor 701, a transmitter 702, and a receiver 703;

The processor 701 is configured to configure CSI-RSs with different time-frequency positions for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells;

The transmitter 702 is configured to send each of the CSI-RSs to the UE, so that the UE measures RSRP according to the time-frequency position of each of the CSI-RSs;

The receiver 703 is configured to receive each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS; the processor 701 is configured to obtain the multi-RRU combined cell or the multi-RRU combined RSRP of each RRU in the cell and its neighboring cells.

Further, when the processor 701 acquires the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells, the processor 701 is specifically configured to: The different CSI-RS configured by each RRU, and the RSRP corresponding to each CSI-RS, acquire the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells.

Further, when the base station configures different CSI-RSs for each RRU in the multi-RRU combined cell, the processor 701 is further configured to adjust the obtained RSRP of each RRU in the multi-RRU combined cell. The downlink transmit power of at least one RRU in the multi-RRU combined cell.

Specifically, the processor 701 sets the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted downlink power for transmission; or, the processor 701 sets the The multiple RRUs combine the downlink power configuration value of at least one RRU in the cell, so that the at least one RRU uses the configured downlink power for transmission.

The RRU output power adjustment value is an offset that increases or decreases several dB based on the RRU transmit power. For example, in a scenario where there is cross-area coverage, that is, although the UE is in the coverage area of CELL1, the signal of CELL2 in the coverage area of CELL1 is relatively strong, so that the UE resides in CELL2. The transmission power of the large RRU makes it possible to eliminate the situation of over-area coverage.

In the scenario of pilot pollution, by obtaining the RSRP of each RRU in each multi-RRU merged cell, set the downlink power of at least one RRU for the RRU level, so that one of the cells is the dominant pilot, so that the UE can camp on stably In this cell, thereby eliminating pilot pollution.

Further, when the base station configures CSI-RSs with different time-frequency positions for each RRU in the multi-RRU combined cell and its adjacent cells, the processor 701 is further configured to, according to the obtained multi-RRU combined cell and The RSRP of each RRU in the adjacent cell, adjust the multi-RRU combined cell to a new multi-RRU combined cell, the new multi-RRU combined cell includes part or all of the RRUs in the multi-RRU combined cell, and includes the Multiple RRUs merge some or all RRUs in the neighboring cells of the cell.

An embodiment of the present invention provides a base station, which uses a processor to configure CSI-RSs with different time-frequency positions for each RRU in a multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells; The RS is sent to the UE, so that the UE measures the RSRP according to the time-frequency position of each CSI-RS; the receiver receives each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS, and The processor obtains the RSRP of each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells. The solution provided by the embodiment of the present invention can configure different CSI-RS for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells, so that the terminal can measure the RSRP according to the time-frequency position of the CSI-RS, Thus, the reference signal received power of each RRU is obtained.

It should be noted that the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physically separated. A unit can be located in one place, or it can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general-purpose hardware. However, in many cases, the former is a better implementation. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., including several instructions to make a computer device (which can be A personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to part of the description of the method embodiments.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A method for measuring reference signal received power, characterized in that, comprising: The base station configures the channel state information reference signal CSI-RS of different time-frequency positions for the multi-radio remote unit RRU combined cell or each RRU in the multi-RRU combined cell and its adjacent cells; The base station sends each of the CSI-RSs to a user equipment UE, so that the UE measures a Reference Signal Received Power RSRP according to the time-frequency position of each of the CSI-RSs; The base station receives each of the CSI-RS reported by the UE and the RSRP corresponding to each of the CSI-RS, and obtains each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its neighboring cells RSRP. 2. The method according to claim 1, wherein the obtaining by the base station of the multi-RRU combined cell or the RSRP of each RRU in the multi-RRU combined cell and its neighboring cells comprises: According to the different CSI-RS configured for each RRU in the multi-RRU combined cell and the RSRP corresponding to each of the CSI-RS, the base station acquires the multi-RRU combined cell or each of the multi-RRU combined cell and its adjacent cells RRU's RSRP. 3. The method according to claim 1, wherein after the base station acquires the RSRP of each RRU in the multi-RRU combined cell, further comprising: According to the acquired RSRP of each RRU in the multi-RRU combined cell, the base station adjusts the downlink transmit power of at least one RRU in the multi-RRU combined cell. 4. The method according to claim 3, wherein the base station adjusting the downlink transmit power of at least one RRU in the multi-RRU merged cell comprises: The base station sets the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted downlink power to transmit; or, The base station sets a downlink power configuration value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the configured downlink power for transmission. 5. The method according to claim 1, wherein after the base station obtains the RSRP of each RRU in the multi-RRU merged cell and its neighboring cells, further comprising: According to the acquired RSRP of each RRU in the multi-RRU combined cell and its adjacent cells, the base station adjusts the multi-RRU combined cell to a new multi-RRU combined cell, and the new multi-RRU combined cell includes the multi-RRU Merge part or all of the RRUs in the cell, and include part or all of the RRUs in the neighboring cells of the multi-RRU merged cell. 6. A measuring device for reference signal received power, characterized in that, comprising: A configuration unit, configured to configure CSI-RSs at different time-frequency positions for each RRU in the multi-RRU combined cell or the multi-RRU combined cell and its adjacent cells; a sending unit, configured to send each of the CSI-RSs to a UE, so that the UE measures RSRP according to the time-frequency position of each of the CSI-RSs; an acquiring unit, configured to receive each of the CSI-RSs reported by the UE and the RSRP corresponding to each of the CSI-RSs, and acquire the multiple RRU combined cell or the multiple RRU combined cell and its neighboring cells RSRP of each RRU. 7. The device according to claim 6, wherein the acquiring unit is used for: According to the different CSI-RS configured for each RRU in the multi-RRU combined cell, and the RSRP corresponding to each of the CSI-RSs, obtain the multi-RRU combined cell or the RSRP of each RRU in the multi-RRU combined cell and its neighboring cells . 8. The device according to claim 6, further comprising: The first processing unit is configured to adjust the downlink transmit power of at least one RRU in the multi-RRU combined cell according to the acquired RSRP of each RRU in the multi-RRU combined cell. 9. The device according to claim 8, wherein the first processing unit comprises: A first setting module, configured to set the output power adjustment value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the adjusted downlink power for transmission; or, The second setting module is configured to set a downlink power configuration value of at least one RRU in the multi-RRU merged cell, so that the at least one RRU uses the configured downlink power for transmission. 10. The device according to claim 6, further comprising: The second processing unit is configured to adjust the multi-RRU combined cell to a new multi-RRU combined cell according to the obtained RSRP of each RRU in the multi-RRU combined cell and its neighboring cells, and the new multi-RRU combined cell includes Part or all of the RRUs in the multi-RRU combined cell include part or all of the RRUs in a neighboring cell of the multi-RRU combined cell.

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