WO2017049980A1

WO2017049980A1 - Method for adjusting pilot reference signal transmission power, and base station

Info

Publication number: WO2017049980A1
Application number: PCT/CN2016/087480
Authority: WO
Inventors: 张伟; 彭劲东
Original assignee: 华为技术有限公司
Priority date: 2015-09-23
Filing date: 2016-06-28
Publication date: 2017-03-30
Also published as: CN105307258B; CN105307258A

Abstract

Disclosed are a method for adjusting a pilot reference signal transmission power, and a base station. The method comprises: a base station acquiring co-frequency measurement reports (MR) periodically reported by all user equipments (UEs) within a target cell in a range covered by the base station (101); the base station computing a cell edge MR ratio according to the reference signal receiving power (RSRP) of the target cell and the RSRPs of neighbouring cells in each co-frequency MR (102); the base station collecting statistics about the resource block (RB) average utilization rate of the target cell, and according to the RB average utilization rate, determining the load condition of the target cell, and acquiring the load conditions of all of the neighbouring cells (103); the base station acquiring a target level margin when the neighbouring cell UE does not perform cell handoff (104); in the case that the cell edge MR ratio exceeds a pre-set threshold, the load condition of the target cell is a high load condition, the load conditions of all the neighbouring cells are low load conditions, and the target level margin is not zero, the base station upregulating the pilot reference signal transmission power of the target cell by a step, wherein the step is less than or equal to the target level margin (105). The present invention ensures that a neighbouring cell user will not be triggered to perform handoff to a target cell when the pilot reference signal transmission power of the target cell is adjusted, and at the same time ensures the gain effect of the power adjustment.

Description

Method and base station for adjusting pilot signal transmission power

This application claims the priority of the Chinese Patent Application filed on Sep. 23, 2015, the Chinese Patent Application No. CN201510611387.9, entitled "A Method for Adjusting the Transmission Power of Pilot Reference Signals and Base Stations", all of which are The content is incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and a base station for adjusting a transmit power of a pilot reference signal.

Background technique

With the continuous development of mobile communication technology, users have put forward higher requirements for the content and quality of mobile communication, including miniaturization of communication equipment, low power consumption, broadband access and rich multimedia services.

Due to the adoption of Orthogonal Frequency Divided Multiple Access (OFDMA) in the communication system, the OFDMA technology uses the orthogonality between frequencies as a way of distinguishing users, and the information of users is orthogonal to each other. On different carriers, since the frequencies used by the users in the cell are orthogonal to each other, all the interferences are from other cells, and the signal to interference plus noise ratio (SINR) of the cell center users can be greatly improved, thereby It can provide higher data rate and better quality of service, but for users at the cell edge, because the users occupying the same carrier resources in the neighboring cell have relatively large interference, and the distance from the base station is relatively small, the SINR is relatively small. The result is that although the throughput of the entire cell is high, the quality of the cell edge user is poor, and the throughput is low, and the inter-cell interference is more serious with the wide application of small base stations (for example, Pico base stations).

In order to reduce the mutual interference between the base stations, one method is to use a measurement report (MR) triggered by the handover measurement control of the cell where the base station is located, and according to the current reference information, the received signal receiving power (RSRP) in the reported MR. The absolute value of the RSRP size of the neighbor cell is evaluated for the interference of the neighbor cell, and the transmit power of the pilot reference signal of the current cell is adjusted according to the statistical result and the decision criterion.

However, the MR event based on the handover measurement control can only collect the area information of the UE where the handover may occur, and the proportion of the users in this part is not statistical, and cannot reflect the interference situation of all users in the entire cell, and at the same time, since the neighbor cell is not acquired. Peer-to-peer information, unable to know neighboring cell side The status of the user is the same. Therefore, after the current cell improves the power adjustment, the interference to the neighbor cell may be increased, and the neighbor cell user may be triggered to switch to the local cell, thereby reducing the available resources of the original user of the current cell. Therefore, only the current cell is used. The collected data is evaluated and the pilot reference signal transmission power is adjusted. After adjustment, the impact on the neighbor cell cannot be determined, and the gain of the entire network cannot be guaranteed.

Summary of the invention

An embodiment of the present invention provides a method for adjusting a transmit power of a pilot reference signal and a base station, which ensures that when the transmit power of the pilot reference signal of the target cell is adjusted, the neighbor cell user is not triggered to switch to the target cell, and the gain of the power adjustment is ensured. effect.

A first aspect of the embodiments of the present invention provides a method for adjusting a transmit power of a pilot reference signal, including:

The base station acquires the same-frequency measurement report MR reported by the UEs in the target cell in the target cell in the coverage of the base station, where the same-frequency MR includes the reference signal received power RSRP of the target cell and the RSRP of the neighboring cell;

The base station calculates a proportion of the cell edge MR according to the RSRP of the target cell and the RSRP of the neighboring cell in each intra-frequency MR;

The base station calculates an average utilization rate of the target cell resource block RB, and determines a load state of the target cell according to the average RB utilization rate, and acquires a load status of all neighbor cells, where the cell load status includes a high load status and Two load states in a low load state;

The base station acquires a target level margin of the neighboring cell UE that does not cause a cell handover to the target cell, where the target level margin is that all UEs in the neighboring cell do not have a cell handover to the target cell. The minimum of the level margins;

The ratio of the MR of the cell edge exceeds a preset threshold, the load state of the target cell is a high load state, the load state of all neighbor cells is a low load state, and the target level margin is not zero. In the case, the base station uplinks the pilot reference signal transmission power of the target cell by one step, and the step size is less than or equal to the target level margin.

With reference to the first aspect of the embodiments of the present invention, in a first possible implementation manner of the first aspect of the embodiments of the present invention,

The base station calculates the proportion of the cell edge MR according to the RSRP of the target cell and the RSRP of the neighboring cell in each intra-frequency MR, including:

The base station respectively uses the same-frequency MR as the target-frequency MR, and in the target-inter-frequency MR, the RSRP of the target cell and the RSRP of a neighboring cell satisfy the SerRSRP-NeighRSRP<xdB, and determine the target The frequency MR is a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of a neighbor cell in the target intra-frequency MR, where x is a preset value and is a positive integer;

After determining the cell edge MRs, the base station calculates the proportion of the cell edge MRs to all the intra-frequency MRs received by the base station.

With reference to the first aspect of the embodiments of the present invention or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect of the embodiments of the present invention,

The base station calculates the average utilization rate of the target cell resource block RB, and determines the target cell load status according to the RB average utilization rate, including:

The base station calculates the average utilization rate of the target cell resource block RB, and determines that the target cell load state is a high load state when the target cell RB utilization rate is greater than or equal to 60%, and the target cell RB utilization rate is less than At 60%, the target cell load state is determined to be a low load state.

In conjunction with the first aspect of the embodiments of the present invention or the first possible implementation of the first aspect or the second possible implementation of the first aspect, a third possible implementation of the first aspect of the embodiments of the present invention In the way,

The method further includes:

When the target cell load state is a high load state, the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are not all low load states or the target level margin is zero. In the case, the base station sends a power adjustment request to the target base station, where the target base station is a base station corresponding to the neighbor cell in which the load state is a low load state in all the neighbor cells.

In a fourth possible implementation manner of the first aspect of the embodiment of the present invention,

The method further includes:

When the target cell load state is a low load state, the base station receives a power adjustment request sent by a base station corresponding to the neighbor cell;

If the target level margin is not zero, the base station lowers the pilot reference signal transmission power of the target cell by one step, and the step size is less than or equal to the target level margin.

A second aspect of the embodiments of the present invention provides a base station, including:

An MR acquisition unit, configured to report an intra-frequency measurement report MR reported by all user equipment UEs in a target cell in a coverage area of the base station, where each intra-frequency MR includes a reference signal received power RSRP and a neighbor of the target cell. RSRP of the cell;

a calculating unit, configured to calculate a ratio of a cell edge MR according to an RSRP of the target cell and an RSRP of a neighboring cell in each intra-frequency MR;

a load status obtaining unit, configured to calculate an average utilization rate of the target cell resource block RB, and determine a load status of the target cell according to the average RB utilization rate, and obtain a load status of all neighbor cells, where the cell load status includes Two load states of high load state and low load state;

a level residual acquiring unit, configured to acquire a target level margin of the neighboring cell UE that does not cause cell handover to the target cell, where the target level margin is that no handover occurs in all UEs in the neighboring cell a minimum of the level margins to the target cell;

The adjusting unit is configured to: the ratio of the MR at the cell edge exceeds a preset threshold, the load state of the target cell is a high load state, the load state of all neighbor cells is a low load state, and the target level is If the amount is not zero, the pilot reference signal transmission power of the target cell is up-regulated by one step, and the step size is less than or equal to the target level margin.

With reference to the second aspect of the embodiments of the present invention, in a first possible implementation manner of the second aspect of the embodiments of the present invention,

The calculating unit is specifically configured to use the each intra-frequency MR as the target intra-frequency MR, and determine the RSRP of the target cell and the RSRP of a neighboring cell in the target intra-frequency MR, and satisfy SerRSRP-NeighRSRP<xdB. The target intra-frequency MR is a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of a neighbor cell in the target intra-frequency MR, where x is a preset value and It is a positive integer; after all cell edge MRs are determined, the ratio of the cell edge MR to all the intra-frequency MRs received by the base station is calculated.

With reference to the second aspect of the embodiment of the present invention or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect of the embodiment of the present invention,

The load status obtaining unit is specifically configured to collect an average utilization rate of the target cell resource block RB, and determine a target cell load status when the target cell RB utilization rate is greater than or equal to 60%. For a high load state, when the target cell RB utilization is less than 60%, the target cell load state is determined to be a low load state.

In conjunction with the second aspect of the embodiment of the present invention or the first possible implementation of the second aspect or the second possible implementation of the second aspect, a third possible implementation of the second aspect of the embodiment of the present invention In the way,

The adjusting unit is further configured to: when the target cell load state is a high load state, where the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are not all low load states or the target When the level margin is not zero, the power adjustment request is sent to the target base station, where the target base station is a base station corresponding to the neighbor cell in which the load state is a low load state in all neighbor cells.

In a fourth possible implementation manner of the second aspect of the embodiment of the present invention, in a fourth possible implementation manner of the second aspect of the embodiment of the present invention,

The base station further includes a receiving unit, where the receiving unit is configured to receive a power adjustment request sent by the base station corresponding to the neighboring cell if the target cell load state is a low load state;

The adjusting unit is further configured to: if the target level margin is not zero, downgrade a pilot reference signal transmit power of the target cell by one step, where the step size is less than or equal to the target level the amount.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

In the embodiment of the present invention, when the target cell load state is a high load state, the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are in a low load state, the neighbor is acquired. The cell UE does not have a level shift of the cell handover. In the case that the level margin is not zero, the base station raises the pilot reference signal transmission power of the target cell by one step, because before adjusting the target cell RSRP, The complete MR data of the target cell is obtained, and the load state of the neighboring cell is fully considered, which ensures that the neighbor cell user is not triggered to switch to the target cell when the target cell pilot reference signal transmission power is adjusted, and the gain effect of the power adjustment is ensured.

DRAWINGS

1 is a schematic diagram of an embodiment of a method for adjusting a transmit power of a pilot reference signal in an embodiment of the present invention;

2 is a schematic diagram of an embodiment of a base station according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another embodiment of a base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is an embodiment of the invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The terms "first", "second", and the like (if any) in the specification and claims of the present invention and the above figures are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

In the following, some concepts that may be involved in the embodiments of the present invention are briefly introduced.

Measurement Report: Measurement Report, referred to as MR, MR sends the measurement control (including the measured frequency information and the judgment criterion of the reported MR) to the user equipment (User Equipment, UE) through the air interface signaling message. When the MR reporting criterion is met, the UE Sending the MR message to the base station (the MR includes the local cell and the neighbor cell RSRP). For a specific base station, only the RSRP of the local cell is a useful signal, and the RSRP of the neighbor cell is an interference signal, and the base station can pass each MR The relative difference between the cell and the neighboring cell RSRP determines the interference size of the neighboring base station, and adjusts the pilot reference signal transmission power of the base station.

SINR: Signal to Interference plus Noise Ratio is the ratio of the strength of the received useful signal to the strength of the received interference signal (noise and interference).

RSRP: Reference Signal Receiving Power, which is a key parameter in the LTE network that can represent the strength of the wireless signal and one of the physical layer measurement requirements, is all REs (resource particles) that carry the reference signal within a certain symbol. The average of the received signal power.

Small base station: Small cell (Small Cell) refers to a small integrated base station. It is a general term for a base station type different from a macro base station. It is divided into a Micro base station Pico base station and a Femto base station according to its support and coverage. Before the 4G era, small base stations were mainly used in blind scenes, and the application scenarios were relatively narrow. However, after the high-frequency and high-bandwidth 4G era, small base stations will become 4G (fourth generation) because they can improve the overall system capacity. The important network components after the era of mobile communication, small base stations can be divided into three different types according to their location: residential base stations for home applications, enterprise/indoor base stations for small or retail enterprise applications, and Outdoor base station for public places. Small base stations can improve the user network experience in homes, offices, and public places.

The following describes the method for adjusting the transmit power of the pilot reference signal in the embodiment of the present invention.

Referring to FIG. 1, an embodiment of a method for transmitting power of an integrated pilot reference signal in an embodiment of the present invention includes:

The base station acquires the intra-frequency measurement report MR reported by all user equipments in the target cell in the coverage area of the base station;

Each of the intra-frequency MRs includes a reference signal received power RSRP of the target cell and an RSRP of the neighboring cell. When the base station coverage includes multiple cells, the target cell is one of the multiple cells, and only includes the base station range. When a cell is used, the target cell is the only cell;

The manner in which the base station acquires the same-frequency MR reported by all the UEs in the target cell is as follows:

The base station sends the measurement control (including the measured frequency point information and the judgment criterion of the reported MR) to all the UEs in the target cell through the air interface signaling message. When the MR reporting criterion is met, the UE in the target cell sends the MR message to the base station (in the MR). Contains the RSRP of the target cell and the RSRP of the neighbor cell.

102. The base station calculates a proportion of the cell edge MR according to the RSRP of the target cell in each intra-frequency MR and the RSRP of the neighboring cell.

Optionally, the calculating, by the base station, the proportion of the cell edge MR according to the RSRP of the target cell in each of the intra-frequency MRs and the RSRP of the neighboring cell may include:

The base station respectively uses the each intra-frequency MR as a target intra-frequency MR, and when the RSRP of the target cell and the RSRP of one neighbor cell in the target intra-frequency MR satisfy SerRSRP-NeighRSRP<xdB, Determining that the target intra-frequency MR is a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of one neighbor cell in the target intra-frequency MR, where x is a preset value and is A positive integer, when there is only one neighbor cell's RSRP in the target intra-frequency MR, the Neigh RSRP is the unique RSRP. When the target intra-frequency MR includes RSRPs of multiple neighbor cells, the RSRP of the multiple neighbor cells is Neigh RSRP, judging, the RSRP of the target cell in the target intra-frequency MR and the RSRP of one neighbor cell, and satisfying the SerRSRP-NeighRSRP<xdB, determining that the target co-frequency MR is the cell edge MR, for example, the target co-frequency MR includes the target The RSRP of the cell and the RSRP of the three neighboring cells, when the RSRP of the target cell and the RSRP of a neighboring cell satisfy the SerRSRP-NeighRSRP<xdB, that is, the target intra-frequency MR is determined to be the cell edge MR, and the value of x may be In [1,4];

After determining the cell edge MRs, the base station calculates the ratio of the cell edge MRs to all the intra-frequency MRs received by the base station, for example, when the number of all intra-frequency MRs received by the base station is 100, the cell edge MR is determined. The number of cells is 30, and the ratio of cell edge MR at this time is 30%.

103. The base station calculates an average utilization rate of the target cell resource block RB, and determines a target cell load status according to the RB average utilization rate, and acquires a load status of all neighbor cells.

The cell load status includes the two load states of the high load state and the low load state, and the average utilization rate of the target cell resource block RB is the existing mode, and details are not described herein again.

Optionally, the determining, by the base station, the average utilization rate of the target cell resource block RB, and determining the target cell load status according to the average RB utilization rate, may include:

The base station calculates the average utilization rate of the target cell resource block RB, and determines that the target cell load state is a high load state when the target cell RB utilization rate is greater than or equal to 60%, and determines the target cell load when the target cell RB utilization rate is less than 60%. The status is a low load state.

In this embodiment, the base station acquires the load status of all the neighboring cells, and the load status information of the neighboring cells is obtained by the base station and the X2 interface between the base stations corresponding to the other neighboring cells.

104. The base station acquires a target level margin of the neighboring cell UE that does not cause a cell handover to the target cell.

The level margin is an adjustable maximum level value at which no cell handover to the target cell occurs in each UE, where the target level margin is that no handover occurs to all UEs in the neighboring cell. a minimum of the level margins of the target cell;

In this embodiment, the preset threshold can be set as needed, for example, 5%, 10%, 20%, 30%, 50%, and the like.

The base station acquires a target level margin of the neighboring cell UE that does not cause a cell handover to the target cell, and may be:

The base station obtains, by using the X2 interface between the base stations corresponding to the neighboring cells, the target level margin of the neighboring cell UE not to be switched to the target cell, that is, the base station corresponding to the neighboring cell needs to determine the neighbor first. The target level margin of the cell handover does not occur in the cell UE, and is then sent to the base station through an X2 interface with the base station. At this time, the base station receives the target level margin through the X2 interface.

The manner that the base station corresponding to the neighboring cell determines that the neighboring cell UE does not cause the cell to switch to the target level of the target cell may be:

The base station corresponding to the neighboring cell determines, according to the difference between the RSRP of the neighboring cell and the RSRP of the target cell in each of the same-frequency MRs, that the UE corresponding to the same-frequency MR does not have the level margin of the cell handover to the target cell, and Determining a minimum value of all the obtained level margins, wherein the minimum value is a target level margin, wherein each of the same-frequency MRs is a base station corresponding to the neighboring cell, and the pre-acquired UE period in the neighboring cell is reported. Each same frequency MR;

The base station corresponding to the neighboring cell determines, according to the difference between the RSRP of the neighboring cell and the RSRP of the target cell in each of the same-frequency MRs, that the UE corresponding to the same-frequency MR does not have the level-to-cell handover to the target cell. Can include:

The base station corresponding to the neighboring cell uses the each intra-frequency MR as the target intra-frequency MR, and calculates the level of the UE corresponding to the target-synchronous MR without cell handover according to the formula delta=RSRP1-RSRP2+A. The quantity delta, where A is an intra-frequency handover threshold, RSRP1 is the RSRP of the neighbor cell in the target co-frequency MR, and RSRP2 is the RSRP of the target cell in the target co-frequency MR.

After determining the delta of all intra-frequency MRs received by the base station, the minimum value of the obtained delta is determined. For example, when three deltas are obtained, respectively, 2 dB, 3 dB, and 5 dB, and the minimum value is determined to be 2 dB. If the cell of the cell has a cell handover to the target cell, the minimum value is a target level margin that the base station can adjust the transmit power of the pilot reference signal.

105. The ratio of the MR at the edge of the cell exceeds a preset threshold, the load state of the target cell is a high load state, the load state of all neighbor cells is a low load state, and the target level margin is not In the case of zero, the base station uplinks the pilot reference signal transmission power of the target cell by one step.

Wherein the step size is less than or equal to the target level margin.

When the ratio of the cell edge MR exceeds a preset threshold, it indicates that the target cell is seriously interfered by the neighbor cell, and the pilot reference signal transmission power adjustment of the base station is required. When the target level margin is not zero, the base station The space for adjusting the transmit power of the pilot reference signal is only available. When the load state of the target cell is a high load state, and the load states of all the neighbor cells are all in a low load state, the pilot reference to the base station can be determined. After the signal transmission power is adjusted upwards, the target cell is a high load, and other neighbor cells are loaded. It can be determined that the gain of the entire network can be ensured after adjustment. The step size of the uplink reference signal transmit power is less than or equal to the target. When the level is marginal, it can be determined that the adjusted neighboring cell UE does not have a cell handover to the target cell.

Therefore, in the target cell load state is a high load state, the ratio of the cell edge MR exceeds a preset threshold, the load state of all neighbor cells is a low load state, and the target level margin is not In the case of zero, the base station adjusts the pilot reference signal transmission power of the target cell by one step (less than or equal to the target level margin), which can ensure that the base station needs to adjust the pilot reference signal transmission power, and has room to go. When the transmit power of the pilot reference signal is adjusted, adjusting the transmit power of the pilot reference signal does not trigger the neighbor cell user to switch to the target cell, and ensures the gain of the entire network after adjustment, thereby improving the user experience.

Optionally, the method may further include:

When the target cell load state is a high load state, the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are not all low load states or the target level margin is not zero. The base station sends a power adjustment request to the target base station, where the target base station is a base station corresponding to the neighbor cell in which the load state is a low load state in all neighbor cells.

At this time, when the ratio of the cell edge MR exceeds a preset threshold, it indicates that the RSRP adjustment needs to be performed on the base station, but if the target cell is in a high load state, and all the neighbor cell load states are not all in a low load state, the base station The pilot reference signal transmission power adjustment cannot guarantee the gain of the entire network. If the target level margin is zero, the base station does not perform the pilot reference signal transmission power adjustment. The space of the UE may be switched due to an adjustment, and the gain of the entire network cannot be guaranteed. At this time, the load state of the target cell is a high load state, and the ratio of the edge MR of the cell exceeds the preset. In the case of a threshold, and the load state of all neighbor cells is not all low load state or the target level margin is not zero, the base station may send a power adjustment request to the target base station, and the power adjustment request is used for Instructing the target base station to perform pilot reference signal transmission power adjustment.

Optionally, the method further includes:

When the target cell load state is a low load state, the base station receives a power adjustment request sent by the base station in the neighbor cell;

In a case where the target level margin is not zero, the base station lowers a pilot reference signal transmission power of the target cell by one step, and the step size is less than or equal to the target level margin.

In this case, the base station receives the power adjustment request of the base station in the high load state when the target cell load state is in the low load state, and can adjust the pilot reference signal transmit power by itself. (that is, the target level margin is not zero), and the pilot reference signal transmission power of the target cell is adjusted, specifically, the pilot reference signal transmission power of the target cell is down-regulated by one step, and the step size is less than or equal to The target level margin.

The base station in the embodiment of the present invention may be a macro base station, or may be a small base station (for example, a Micro base station Pico base station, a Femto base station, etc.), and the small base station is widely used in an indoor coverage scene in wireless network coverage, and the feature is that the coverage is small. The number of access users is limited, and the required number of deployments is large and dense, which causes mutual interference between small base stations to be more serious. Therefore, the method for adjusting the transmission power of the reference signal in the small base station is particularly effective.

The following describes an embodiment of a base station in the embodiment of the present invention.

Referring to FIG. 2, an embodiment of the base station 200 in the embodiment of the present invention includes:

The MR acquisition unit 201 is configured to perform the same-frequency measurement report MR reported by all user equipments in the target cell in the coverage area of the base station, where each of the intra-frequency MRs includes the reference signal received power RSRP of the target cell. RSRP of the neighbor cell;

The calculating unit 202 is configured to calculate a proportion of the cell edge MR according to the RSRP of the target cell and the RSRP of the neighboring cell in each intra-frequency MR;

The load status obtaining unit 203 is configured to collect the average utilization rate of the target cell resource block RB, determine the target cell load status according to the RB average utilization rate, and acquire all neighbor cells. Load status, wherein the cell load status includes two load states: a high load state and a low load state;

The level residual acquisition unit 204 is configured to acquire a target level margin of the neighboring cell UE that does not cause cell handover to the target cell, where the target level margin is that no cells in all cells in the neighboring cell do not occur. Switching to a minimum of the level margin of the target cell;

The adjusting unit 205 is configured to: the ratio of the cell edge MR exceeds a preset threshold, the target cell load state is a high load state, the all neighbor cell load states are all low load states, and the target level If the remaining amount is not zero, the pilot reference signal transmission power of the target cell is up-regulated by one step, and the step size is less than or equal to the target level margin.

In the embodiment of the present invention, the load state of the target cell is a high load state, the ratio of the cell edge MR exceeds a preset threshold, the load states of all neighbor cells are all low load states, and the target level is When the amount is not zero, the base station raises the pilot reference signal transmission power of the target cell by one step. Since the complete MR data of the target cell is acquired before adjusting the target cell pilot reference signal transmission power, the neighbors are fully considered. The peer information of the cell (the load state of the neighbor cell) ensures that the neighbor cell user is not triggered to switch to the target cell when the target cell pilot reference signal transmission power is adjusted, and the gain effect of the power adjustment is ensured.

Optionally, the calculating unit 202 is specifically configured to use the each intra-frequency MR as the target intra-frequency MR, and the RSRP of the target cell and the RSRP of one neighbor cell in the target intra-frequency MR satisfy SerRSRP-NeighRSRP<xdB. The target intra-frequency MR is determined to be a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of a neighbor cell in the target co-frequency MR, where x is a preset value. And is a positive integer; after all the cell edge MRs are determined, the ratio of the cell edge MR to all the intra-frequency MRs received by the base station is calculated.

Optionally, the load status obtaining unit 203 is specifically configured to calculate an average utilization rate of the target cell resource block RB, and determine that the target cell load status is a high load state when the target cell RB utilization rate is greater than or equal to 60%, in the target cell RB. When the utilization rate is less than 60%, it is determined that the target cell load state is a low load state.

Optionally, the adjusting unit 205 is further configured to: when the target cell load state is a high load state, where the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are not all low loads. If the state or the target level margin is not zero, the base station sends a power adjustment request to the target base station, where the target base station is in a low load state in the neighboring cells. The base station corresponding to the neighbor cell.

Optionally, the base station further includes a receiving unit, where the receiving unit is configured to receive a power adjustment request sent by the base station corresponding to the neighbor cell if the target cell load state is a low load state;

The adjusting unit 205 is further configured to: if the target level margin is not zero, lower a pilot reference signal transmit power of the target cell by one step, where the step size is less than or equal to the target level margin.

The base station in the embodiment of the present invention is described above from the perspective of a unitized functional entity. The base station in the embodiment of the present invention is described from the perspective of hardware processing. Referring to FIG. 3, the terminal in the embodiment of the present invention includes: receiving 301 and processor 302 (may have one or more).

The base station according to an embodiment of the present invention may have more or less components than those shown in FIG. 3, may combine two or more components, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.

The receiver 301 is configured to perform the following operations:

And receiving the same-frequency measurement report MR reported by the UEs in the target cell, where each of the intra-frequency MRs includes the reference signal received power RSRP of the target cell and the RSRP of the neighboring cell.

The processor 302 is configured to perform the following operations:

Calculating a ratio of the cell edge MR according to the RSRP of the target cell and the RSRP of the neighboring cell in each intra-frequency MR;

And calculating, according to the RB average utilization rate, the target cell load state, and acquiring load states of all neighbor cells, where the cell load state includes a high load state and a low load state. Load status

Obtaining a target level margin of the neighboring cell UE that does not cause a cell handover to the target cell, where the target level margin is a level of the UE that does not have a cell handover to the target cell in the neighboring cell. The minimum value in the quantity;

The ratio of the MR of the cell edge exceeds a preset threshold, the load state of the target cell is a high load state, the load state of all neighbor cells is a low load state, and the target level margin If not zero, the pilot reference signal transmission power of the target cell is up-regulated by one step, and the step size is less than or equal to the target level margin.

Optionally, the processor 302 is specifically configured to perform the following operations:

The target intra-frequency MR is respectively determined by using the same-frequency MR as the target, and the target-frequency MR is determined when the RSRP of the target cell and the RSRP of one neighboring cell satisfy the SerRSRP-NeighRSRP<xdB in the target intra-frequency MR. a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of the neighbor cell in the target intra-frequency MR, where x is a preset value and is a positive integer;

After all cell edge MRs are determined, the ratio of the cell edge MR to all of the intra-frequency MRs received by the base station is calculated.

The RB average utilization rate of the target cell resource block is determined. When the target cell RB utilization rate is greater than or equal to 60%, the target cell load state is determined to be a high load state, and when the target cell RB utilization rate is less than 60%, the target cell load state is determined to be low. Load status.

Optionally, the processor 302 is further configured to perform the following operations:

Optionally, the receiver 301 is further configured to:

Receiving a power adjustment request sent by the base station in the neighboring cell when the target cell load state is a low load state;

The processor 302 is further configured to perform the following operations:

In a case where the target level margin is not zero, the pilot reference signal transmission power of the target cell is lowered by one step, and the step size is less than or equal to the target level margin.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium can be stored A program is stored, the program including at least some or all of the steps of adjusting the pilot reference signal transmission power method described in the foregoing method embodiments.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; The present invention has been described in detail with reference to the foregoing embodiments, and those skilled in the art will understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the invention.

Claims

A method for adjusting a transmit power of a pilot reference signal, characterized in that

The base station acquires the same-frequency measurement report MR reported by the UEs in the target cell in the target cell in the coverage of the base station, where the same-frequency MR includes the reference signal received power RSRP of the target cell and the RSRP of the neighboring cell;

The base station calculates a proportion of the cell edge MR according to the RSRP of the target cell and the RSRP of the neighboring cell in each intra-frequency MR;

The base station calculates an average utilization rate of the target cell resource block RB, and determines a load state of the target cell according to the average RB utilization rate, and acquires a load status of all neighbor cells, where the cell load status includes a high load status and Two load states in a low load state;

The base station acquires a target level margin of the neighboring cell UE that does not cause a cell handover to the target cell, where the target level margin is that all UEs in the neighboring cell do not have a cell handover to the target cell. The minimum of the level margins;

The ratio of the MR of the cell edge exceeds a preset threshold, the load state of the target cell is a high load state, the load state of all neighbor cells is a low load state, and the target level margin is not zero. In the case, the base station uplinks the pilot reference signal transmission power of the target cell by one step, and the step size is less than or equal to the target level margin.
The method of claim 1 wherein

The base station calculates the proportion of the cell edge MR according to the RSRP of the target cell and the RSRP of the neighboring cell in each intra-frequency MR, including:

The base station respectively uses the same-frequency MR as the target-frequency MR, and in the target-inter-frequency MR, the RSRP of the target cell and the RSRP of a neighboring cell satisfy the SerRSRP-NeighRSRP<xdB, and determine the target The frequency MR is a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of a neighbor cell in the target intra-frequency MR, where x is a preset value and is a positive integer;

After determining the cell edge MRs, the base station calculates the proportion of the cell edge MRs to all the intra-frequency MRs received by the base station.
Method according to claim 1 or 2, characterized in that

The base station calculates an average utilization rate of the target cell resource block RB, and averages the RB according to the RB The usage rate determines the target cell load status, including:

The base station calculates the average utilization rate of the target cell resource block RB, and determines that the target cell load state is a high load state when the target cell RB utilization rate is greater than or equal to 60%, and the target cell RB utilization rate is less than At 60%, the target cell load state is determined to be a low load state.
A method according to any one of claims 1 to 3, characterized in that

The method further includes:

When the target cell load state is a high load state, the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are not all low load states or the target level margin is zero. In the case, the base station sends a power adjustment request to the target base station, where the target base station is a base station corresponding to the neighbor cell in which the load state is a low load state in all the neighbor cells.
A method according to any one of claims 1 to 4, characterized in that

The method further includes:

When the target cell load state is a low load state, the base station receives a power adjustment request sent by a base station corresponding to the neighbor cell;

If the target level margin is not zero, the base station lowers the pilot reference signal transmission power of the target cell by one step, and the step size is less than or equal to the target level margin.
A base station, comprising:

An MR acquisition unit, configured to report an intra-frequency measurement report MR reported by all user equipment UEs in a target cell in a coverage area of the base station, where each intra-frequency MR includes a reference signal received power RSRP and a neighbor of the target cell. RSRP of the cell;

a calculating unit, configured to calculate a ratio of a cell edge MR according to an RSRP of the target cell and an RSRP of a neighboring cell in each intra-frequency MR;

a load status obtaining unit, configured to calculate an average utilization rate of the target cell resource block RB, and determine a load status of the target cell according to the average RB utilization rate, and obtain a load status of all neighbor cells, where the cell load status includes Two load states of high load state and low load state;

a level residual acquiring unit, configured to acquire a target level margin of the neighboring cell UE that does not cause cell handover to the target cell, where the target level margin is that no handover occurs in all UEs in the neighboring cell a minimum of the level margins to the target cell;

An adjusting unit, configured to: at a cell edge, the ratio of the MR exceeds a preset threshold, the target cell The load state is a high load state, the load state of all neighbor cells is a low load state, and if the target level margin is not zero, the pilot reference signal transmit power of the target cell is up-regulated by one step. The step size is less than or equal to the target level margin.
The base station according to claim 6, wherein

The calculating unit is specifically configured to use the each intra-frequency MR as the target intra-frequency MR, and determine the RSRP of the target cell and the RSRP of a neighboring cell in the target intra-frequency MR, and satisfy SerRSRP-NeighRSRP<xdB. The target intra-frequency MR is a cell edge MR, where the SerRSRP is the RSRP of the target cell in the target intra-frequency MR, and the NeighRSRP is the RSRP of a neighbor cell in the target intra-frequency MR, where x is a preset value and It is a positive integer; after all cell edge MRs are determined, the ratio of the cell edge MR to all the intra-frequency MRs received by the base station is calculated.
A base station according to claim 6 or 7, wherein

The load status obtaining unit is specifically configured to calculate an average utilization rate of the target cell resource block RB, and determine that the target cell load status is a high load state when the target cell RB utilization rate is greater than or equal to 60%, When the target cell RB utilization is less than 60%, it is determined that the target cell load state is a low load state.
A base station according to any one of claims 6 to 8, characterized in that

The adjusting unit is further configured to: when the target cell load state is a high load state, where the ratio of the cell edge MR exceeds a preset threshold, and all the neighbor cell load states are not all low load states or the target When the level margin is not zero, the power adjustment request is sent to the target base station, where the target base station is a base station corresponding to the neighbor cell in which the load state is a low load state in all neighbor cells.
A base station according to any one of claims 6 to 9, wherein

The base station further includes a receiving unit, where the receiving unit is configured to receive a power adjustment request sent by the base station corresponding to the neighboring cell if the target cell load state is a low load state;

The adjusting unit is further configured to: if the target level margin is not zero, downgrade a pilot reference signal transmit power of the target cell by one step, where the step size is less than or equal to the target level the amount.