Power adjustment method and its device

Abstract

An embodiment of the present application discloses a power adjustment method used to adjust the power of a serving cell. In an embodiment of the present application, the method includes: a serving cell sends a first message to a first terminal, the first message instructs the first terminal to configure a first measurement bandwidth as a center bandwidth, the frequency range of the center bandwidth is smaller than the frequency range of the full bandwidth, the full bandwidth represents the maximum bandwidth allocated to the serving cell, the first measurement bandwidth is a bandwidth used by the first terminal to measure channel quality, the serving cell decreases power in a second bandwidth, the frequency range of the second bandwidth is a frequency range obtained by subtracting the frequency range of the center bandwidth from the frequency range of the full bandwidth, and the serving cell increases power of the center bandwidth. In an embodiment of the present application, the power of the CRS port of the center bandwidth is increased, and as a result, the coverage of the serving cell is increased.

Description

Technical Field

[0001] This application claims priority to Chinese Patent Application No. 202011637846.8, titled "Power Adjustment Method and Its Device", filed with the China National Intellectual Property Administration on December 31, 2020, which is incorporated herein by reference in its entirety.

[0002] Embodiments of the present application relate to the field of communication technologies, and specifically, to power adjustment methods and their devices.

Background Art

[0003] The large-scale antenna array (FDD Massive MIMO, FDD MIMO) technology is a multi-antenna technology that enables multiple users to multiplex the same time-frequency resources to double the spectral efficiency.

[0004] FDD MIMO is mainly used in capacity scenarios. As the number of users in a live network increases, the requirements for coverage become increasingly high. For example, the FDD large-scale MIMO technology is used for coverage in areas where the inter-site distance is large and more load is distributed from low bands. These requirements are essentially requirements for improving coverage. To improve coverage, the power of the active antenna unit (AAU) is usually increased. In other words, more AAU power is used to improve coverage.

[0005] However, due to device cost control and performance limitations, the device cannot continuously increase the power of the AAU. Therefore, when the power of the AAU of the current device is limited, the increase in signal coverage is limited.

Summary of the Invention

[0006] Embodiments of the present application provide a power adjustment method for improving the coverage of the signal of a serving cell.

Means for Solving the Problem

[0007] The first aspect of the embodiment of the present application provides a power adjustment method including the following.

[0008] The serving cell transmits a first message to a first terminal, instructs the first terminal so that the first message is configured with a first measurement bandwidth as the center bandwidth, the frequency range of the center bandwidth is smaller than the frequency range of the entire bandwidth, the entire bandwidth represents the maximum bandwidth allocated to the serving cell, the first measurement bandwidth is the bandwidth used by the first terminal to measure the channel quality, the serving cell reduces the power with a second bandwidth, the frequency range of the second bandwidth is a frequency range obtained by subtracting the frequency range of the center bandwidth from the frequency range of the entire bandwidth, and the serving cell increases the power of the center bandwidth.

[0009] In the embodiment of the present application, the serving cell transmits a first message used to set the measurement bandwidth as the center bandwidth to the first terminal, reduces the power of the second bandwidth, and increases the power of the center bandwidth. As a result, the first terminal receives a stronger measurement signal based on the fact that the measurement bandwidth is the center bandwidth. Thereby, the coverage of the signal of the serving cell is improved.

[0010] Based on the implementation of the first aspect, in one possible implementation, the serving cell increasing the power with the center bandwidth means that the serving cell increases the power of the cell-specific reference signal CRS port with the center bandwidth, the CRS port is configured to transmit a CRS signal, and the CRS signal is used by the first terminal to measure the channel quality.

[0011] In the embodiment of the present application, the power of the CRS port of the center bandwidth is increased, and as a result, the coverage of the measurement signal of the serving cell is increased.

[0012] Based on the implementation of the first aspect, in one possible implementation, the CRS ports include CRS port 0 and CRS port 1. For the serving cell to increase the power of the CRS ports in the central bandwidth includes the serving cell increasing the power of CRS port 0 and CRS port 1 in the central bandwidth.

[0013] In an embodiment of the present application, the power of port 0 and the power of port 1 are increased, and as a result, the coverage of the measurement signal of the serving cell is increased.

[0014] Based on the implementation of the first aspect, in one possible implementation, for the serving cell to decrease the power in the second bandwidth is for the serving cell to decrease the power of the CRS ports in the second bandwidth, where the CRS ports are configured to transmit CRS signals, and the CRS signals are used by a first terminal to measure channel quality.

[0015] In an embodiment of the present application, the power of the CRS ports within the second bandwidth is decreased, and the implementability of this solution is improved.

[0016] Based on the implementation of the first aspect, in one possible implementation, the CRS ports include CRS port 2 and CRS port 3. For the serving cell to decrease the power of the CRS ports in the second bandwidth includes the serving cell decreasing the power of CRS port 2 and CRS port 3 in the second bandwidth.

[0017] In this embodiment of the present application, the power of port 2 and port 3 within the second bandwidth is decreased, and the implementability of this solution is improved.

[0018] Based on the implementation of the first aspect, in one possible implementation, the first terminal includes a target terminal, and the target terminal is a terminal that does not support the instruction of the first message. The method further includes that the serving cell identifies the target terminal and obtains first measurement compensation information, where the first measurement compensation information is used to compensate the measurement value of the target terminal, so that the target terminal continues to connect to the serving cell.

[0019] In an embodiment of the present application, the first measurement compensation information is obtained so that the target terminal can maintain its connection to the serving cell.

[0020] Based on the implementation of the first aspect, in one possible implementation, the serving cell identifying the target terminal includes that when the target terminal accesses the serving cell, the serving cell starts a timer, and when the target terminal is handed over to the target cell before the timer expires, the serving cell determines that the target terminal is a terminal that does not support the instruction of the first message and the target cell is an adjacent cell.

[0021] In an embodiment of the present application, the timer is used to determine that the target terminal is a terminal that does not support the instruction of the first message, thereby improving the implementability of the solution.

[0022] Based on the implementation of the first aspect, in one possible implementation, for the serving cell to identify the target terminal, the serving cell compares the first measurement value of the target terminal with the second measurement value of the target terminal to obtain a measurement difference, where the first measurement value is a value obtained by measuring the channel quality of the serving cell before the target terminal is handed over to the serving cell, the second measurement value is a value obtained by measuring the channel quality of the serving cell after the target terminal is handed over to the serving cell, and when the measurement difference is greater than a preset threshold, the serving cell determines that the target terminal is a terminal that does not support the instruction of the first message.

[0023] In the embodiments of the present application, by comparing the first measurement value and the second measurement value, it is determined that the target terminal is a terminal that does not support the instruction of the first message. Thereby, the implementability of this solution is improved.

[0024] Based on the implementation of the first aspect, in one possible implementation, before the serving cell compares the first measurement value of the target terminal with the second measurement value of the target terminal to obtain a measurement difference, the method further includes the serving cell receiving the first measurement value transmitted by the target cell, where the first measurement value is a value obtained by measuring the channel quality of the serving cell when the terminal is connected to the target cell.

[0025] In the embodiments of the present application, since the first measurement value transmitted by the target cell is received, the implementability of this solution is improved.

[0026] Based on the implementation of the first aspect, in one possible implementation, the serving cell and the target cell are cells corresponding to the same active antenna unit AAU, and the first measurement value and the second measurement value are measured based on the uplink RSRP of the serving cell.

[0027] In an embodiment of the present application, to avoid the case where the target terminal performs a ping-pong handover, both the first measurement value and the second measurement value are measured based on the uplink RSRP of the serving cell.

[0028] Based on the implementation of the first aspect, in one possible implementation, the method includes: the serving cell determines whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal; and when either the uplink quality of the target terminal or the downlink quality of the target terminal is less than a preset threshold, the serving cell sends a handover command to the target terminal, and the handover command instructs the target terminal to perform a cell handover.

[0029] In an embodiment of the present application, the serving cell determines whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal. Thereby, the channel quality of the connection of the target terminal is improved, and the user experience is further improved.

[0030] The second aspect of the present application provides a serving cell, and this serving cell includes a transmitting unit configured to transmit a first message to a first terminal, the first message instructing the first terminal to configure a first measurement bandwidth as a central bandwidth, the frequency range of the central bandwidth being smaller than the frequency range of the entire bandwidth, the entire bandwidth representing the maximum bandwidth allocated to the serving cell, and the first measurement bandwidth being the bandwidth used by the first terminal to measure the channel quality; a reducing unit configured to reduce the power in a second bandwidth, the frequency range of the second bandwidth being a frequency range obtained by subtracting the frequency range of the central bandwidth from the frequency range of the entire bandwidth; an increasing unit configured to increase the power of the central bandwidth includes

[0031] Based on the serving cell of the second aspect, in one possible implementation, the increasing unit is specifically configured to increase the power of the cell-specific reference signal CRS port at the central bandwidth, where the CRS port is configured to transmit a CRS signal, and the CRS signal is used by a first terminal to measure the channel quality.

[0032] Based on the serving cell of the second aspect, in one possible implementation, the CRS port includes CRS port 0 and CRS port 1, and the increasing unit is specifically configured to increase the power of CRS port 0 and CRS port 1 at the central bandwidth.

[0033] Based on the serving cell of the second aspect, in one possible implementation, the decreasing unit is specifically configured to decrease the power of the CRS port at the second bandwidth, where the CRS port is used to transmit a CRS signal, and the CRS signal is used by a first terminal to measure the channel quality.

[0034] Based on the serving cell of the second aspect, in one possible implementation, the CRS port includes CRS port 2 and CRS port 3, and the decreasing unit is specifically configured to decrease the power of CRS port 2 and CRS port 3 at the second bandwidth.

[0035] Based on the serving cell of the second aspect, in one possible implementation, the first terminal includes a target terminal, and the target terminal is a terminal that does not support the instruction of the first message. The serving cell an identification unit configured to identify the target terminal, an acquisition unit configured to acquire first measurement compensation information, where the first measurement compensation information is used to compensate the measurement value of the target terminal, so that the target terminal continues to connect to the serving cell, and the acquisition unit further includes.

[0036] Based on the serving cell of the second aspect, in one possible implementation, when the target terminal accesses the serving cell, the serving cell further includes a starting unit configured to start a timer.

[0037] If the target terminal is handed over to the target cell before the timer expires, the serving cell further includes a determination unit configured to determine that the target terminal is a terminal that does not support the instruction of the first message and the target cell is an adjacent cell.

[0038] Based on the serving cell of the second aspect, in one possible implementation, the identification unit is specifically configured to compare the first measurement value of the target terminal and the second measurement value of the target terminal to obtain a measurement difference, where the first measurement value is a value obtained by measuring the channel quality of the serving cell before the target terminal is handed over to the serving cell, and the second measurement value is a value obtained by measuring the channel quality of the serving cell after the target terminal is handed over to the serving cell.

[0039] If the measurement difference is greater than a preset threshold, the determination unit is specifically configured to determine that the target terminal is a terminal that does not support the instruction of the first message.

[0040] Based on the serving cell of the second aspect, in one possible implementation, the serving cell further includes a receiving unit configured to receive a first measurement value transmitted by the target cell, where the first measurement value is a value obtained by measuring the channel quality of the serving cell when the terminal is connected to the target cell.

[0041] ​​​Based on the serving cell of the second aspect, in one possible implementation, the serving cell and the target cell are cells corresponding to the same active antenna unit AAU, and the first measurement value and the second measurement value are measured based on the uplink RSRP of the serving cell.

[0042] Based on the serving cell of the second aspect, in one possible implementation, the serving cell further includes a determination unit configured to determine whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal. including further.

[0043] If either the uplink quality of the target terminal or the downlink quality of the target terminal is less than a preset threshold, the transmission unit is further configured to transmit a handover command to the target terminal, where the handover command instructs the target terminal to perform a cell handover.

[0044] The method executed by each unit of the serving cell in the second aspect of the present application is the same as the power adjustment method in the first aspect. Details are not repeated here.

[0045] The third aspect of the present application provides a computer storage medium. The computer storage medium stores instructions, and when the instructions are executed on a computer, the computer is enabled to execute the method according to the implementation of the first aspect of the present application.

[0046] The fourth aspect of the present application provides a computer program product. When the computer program product is executed on a computer, the computer is enabled to execute the method according to the implementation of the first aspect of the present application.

[0047] According to the foregoing technical solutions, it can be found that the embodiments of the present application have the following advantages.

[0048] In an embodiment of the present application, the serving cell transmits a first message used to set the measurement bandwidth as the central bandwidth to a first terminal, reduces the power of the second bandwidth, and increases the power of the central bandwidth. As a result, the first terminal receives a stronger measurement signal based on the fact that the measurement bandwidth is the central bandwidth. Thereby, the coverage of the serving cell is improved.

Brief Description of the Drawings

[0049]

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Embodiments for Carrying out the Invention

[0050] Embodiments of the present application provide a power adjustment method and its device.

[0051] Hereinafter, while referring to the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described. It is obvious that the described embodiments are only a part, not all, of the embodiments of the present application. All other embodiments that can be easily obtained by those skilled in the art based on the embodiments of the present application shall be included within the protection scope of the present application.

[0052] FIG. 1 is a schematic scenario diagram of a data transmission system according to an embodiment of the present application.

[0053] As shown in FIG. 1, the data transmission system includes one base station, one or more cells covered by the base station, and one or more terminals (UEs) covered by the one or more cells. The base station uses large-scale antenna array (FDD massive MIMO) technology and software to implement multiple cells within a sector so that multiple users can reuse the same time-frequency resource to improve the spectral efficiency multiple times.

[0054] Massive antenna array technology is mainly used in capacity scenarios. As the number of users in a live network increases, the requirements for coverage become increasingly high. Some sites have proposed to expand the application scenarios of massive antenna array technology. For example, massive antenna array technology is used for coverage in areas where the site - to - site distance is large and more loads are distributed from low bands (700 MHz, 800 MHz, and 900 MHz). These requirements are essentially for coverage improvement. Insufficient coverage will lead to user confusion, traffic reduction, and operator revenue reduction.

[0055] In the prior art, there are multiple ways to increase coverage. In the first method, the overall power of the entire AAU is increased to increase coverage. However, due to cost control and device performance limitations, the power of the AAU cannot be continuously increased. Therefore, when the power of the AAU is limited, the increase in signal coverage is limited.

[0056] In the second method, the power ratio (Pa / Pb) of the transmitted data signal to the transmitted pilot signal is decreased, where Pa is the ratio of the transmitted data signal to the transmitted pilot signal, and Pb is the ratio of data on different symbols (OFDM). In OFDM with pilot signals, more power is concentrated for the pilot signal, so the pilot signal measured by the terminal becomes stronger. Therefore, more distant users can access the network. This increases the coverage. For example, when the configuration of Pa / Pb is (0,0), the coverage can be increased by configuring Pa / Pb to (- 3,1) or (- 6,1), where (- 3,1) means that the transmission power of the data signal is half of the transmission power of the pilot signal, and (- 6,1) means that the transmission power of the data signal is one - quarter of the transmission power of the pilot signal. However, if the transmission power of the data signal is too low, the terminal becomes unstable when receiving data, and the user experience deteriorates.

[0057] In the third method, coverage is adjusted by adjusting the engineering parameters of the base station, for example, adjusting the electrical and physical downtilt angles of the base station antennas, or installing the antennas at a higher height. These methods can increase the received signal level of users far from the base station, but decrease the signal strength of users near the base station. That is, while the coverage is increased, the signal strength of users near the base station is decreased.

[0058] To increase coverage without changing the total power, one embodiment of the present application provides a data processing method. The specific description is as follows. For ease of understanding, the terms in this embodiment of the present application are first explained.

[0059]

Table 1

[0060] FIG. 2 is a schematic flowchart of a data processing method according to an embodiment of the present application.

[0061] In step 201, the serving cell transmits a first message to the first terminal.

[0062] When the serving cell needs to increase coverage, the serving cell transmits a first message to the first terminal. The first message instructs the first terminal to configure the first measurement bandwidth as the central bandwidth, and the frequency range of the central bandwidth is smaller than the frequency range of the entire bandwidth, where the entire bandwidth represents the maximum bandwidth allocated to the serving cell. The first measurement bandwidth is the bandwidth used by the first terminal to measure the channel quality.

[0063] Specifically, the first message is air interface signaling transmitted by the serving cell. In one possible implementation, the first message may be a broadcast message transmitted by the serving cell, and the broadcast message carries indication information for instructing the first terminal to configure the first measurement bandwidth as the center bandwidth. Alternatively, the first message may be other air interface signaling transmitted by the serving cell, for example, a separate indication message for instructing the first terminal to configure the first measurement bandwidth as the center bandwidth. It should be understood that the specific form of the first message is not limited in this specification.

[0064] The first measurement bandwidth represents the bandwidth used by the first terminal to measure the pilot signal. Usually, the first measurement bandwidth is typically set to the full bandwidth, that is, the maximum bandwidth allocated by the serving cell. The center bandwidth is a frequency range that starts from the center frequency in the full bandwidth and spreads to the frequencies on both sides of the full bandwidth, and is called the center bandwidth. For example, if the frequency range of the full bandwidth is 1840 MHz to 1860 MHz, the frequency range of the center bandwidth may be 1848 MHz to 1852 MHz. The frequency range of the center bandwidth is not particularly limited in the present embodiment of this application, provided that the frequency range of the center bandwidth is smaller than the frequency range of the full bandwidth.

[0065] After receiving the first message, the first terminal can configure the first measurement bandwidth as the center bandwidth based on the first message. Specifically, before configuration, the first terminal measures the channel quality using the full bandwidth, and after configuration, the first terminal measures the channel quality using the frequency range corresponding to the center bandwidth.

[0066] The first terminal may be a terminal that has established a connection to the serving cell on the condition that it can receive the first message transmitted by the serving cell, or it may be a terminal that is within an adjacent cell and has not established a connection to the serving cell. This is not particularly limited here.

[0067] In step 202, the serving cell reduces its power at the second bandwidth.

[0068] After the serving cell transmits the first message, the serving cell reduces its power at the second bandwidth. The frequency range of the second bandwidth is the frequency range obtained by subtracting the frequency range of the central bandwidth from the frequency range of the entire bandwidth.

[0069] For example, if the frequency range of the entire bandwidth is 1840 MHz to 1860 MHz and the frequency range of the central bandwidth is 1848 MHz to 1852 MHz. In this case, the frequency range of the second bandwidth is 1840 - 1847 MHz and 1853 - 1860 MHz. That is, the range of the second bandwidth is the frequency range obtained by subtracting the frequency range of the central bandwidth from the frequency range of the entire bandwidth.

[0070] Specifically, in one possible implementation, after the serving cell transmits the first message, the serving cell correspondingly adjusts the power of the entire cell to reduce the power in the second bandwidth. To ensure that the operation is transparent to the user and to ensure that the demodulation performance of QAM - modulated users does not deteriorate, the power in the second bandwidth is reduced without distinguishing logical channels, RS signals, physical channels, etc., that is, the power of all RE resources corresponding to the second bandwidth is reduced.

[0071] In one possible implementation, when the power of the second bandwidth is reduced, the power corresponding to the CRS ports of the second bandwidth is not reduced. The CRS ports are used to transmit measurement signals, and the terminal uses the measurement signals transmitted by the CRS ports to perform channel quality measurements. Therefore, when the power of other resources of the second bandwidth is reduced, the power corresponding to the CRS ports is not reduced.

[0072] In one possible implementation, when the power of the second bandwidth is reduced, the power of port0 and port1 of the CRS port of the second bandwidth is not reduced, and the power of port3 and port4 of the CRS port may be reduced. When the terminal measures the channel quality, the main interconnection ports are port0 and port1 in the CRS port. Therefore, not reducing the power of port0 and port1 helps to improve the coverage of the terminal.

[0073] In step 203, the serving cell increases the power of the central bandwidth.

[0074] After reducing the power in the second bandwidth, the serving cell increases the power in the central bandwidth.

[0075] Specifically, after reducing the power of the resources corresponding to the second bandwidth, the serving cell shares the power using the AAU physical channel, and the serving cell increases the power of the resources corresponding to the central bandwidth. It should be noted that when the serving cell reduces the specific power of the resources corresponding to the second bandwidth, the serving cell increases the specific power of the resources corresponding to the central bandwidth. For example, when the serving cell reduces the power of 100 units of the resources corresponding to the second bandwidth, the serving cell increases the power of 100 units of the resources corresponding to the central bandwidth. In the actual application process, alternatively, after reducing the power of 100 units of the resources corresponding to the second bandwidth, the power of 80 units of the resources corresponding to the central bandwidth may be increased, or the power of 100 units of the resources corresponding to the second bandwidth is reduced and the power of 120 units of the resources corresponding to the central bandwidth is increased. The specific power of the resources corresponding to the central bandwidth that needs to be increased can be determined based on the actual situation. This is not particularly limited here.

[0076] In one possible implementation, the serving cell correspondingly adjusts the power of the entire cell to increase the power of the resources corresponding to the entire central bandwidth. To ensure that the operation is transparent to the user and to ensure that the demodulation performance of the QAM modulation user does not deteriorate, the power of the central bandwidth is increased without distinguishing logical channels, RS signals, physical channels, etc., that is, the power of all REs corresponding to the central bandwidth is increased.

[0077] In one possible implementation, when the power of the central bandwidth is increased, only the power corresponding to the CRS port of the central bandwidth is increased. The CRS port is used to transmit measurement signals, and the terminal uses the measurement signals transmitted by the CRS port to perform channel quality measurements. Therefore, when the power of the central bandwidth is increased, only the power corresponding to the CRS port of the central bandwidth is increased.

[0078] In one possible implementation, when the power of the central bandwidth is increased, only the power of port0 and port1 of the CRS ports in the central bandwidth increases. When the terminal measures the channel quality, the main interconnection ports are port0 and port1 within the CRS ports. Therefore, increasing the power of port0 and port1 of the CRS ports in the central bandwidth helps to improve the coverage of the terminal.

[0079] For example, as shown in FIG. 3, the serving cell only decreases the power of port2 and port3 of the CRS ports in the second bandwidth without decreasing the power of port0 and port1 of the CRS ports in the second bandwidth, and increases the power of the entire CRS ports in the central bandwidth.

[0080] As shown in FIG. 4, the serving cell decreases the power corresponding to all resources in the second bandwidth, and when increasing the power, the serving cell only increases the power of port0 and port1 of the CRS ports in the central bandwidth.

[0081] As shown in FIG. 5, the serving cell decreases the power corresponding to all resources in the second bandwidth, and when increasing the power, the serving cell also increases the power corresponding to all resources in the central bandwidth, that is, increases the power of all ports of the CRS ports in the central bandwidth.

[0082] As shown in FIG. 6, the serving cell only decreases the power of port2 and port3 of the CRS ports in the second bandwidth without decreasing the power of port0 and port1 of the CRS ports in the second bandwidth, and when increasing the power, the serving cell only increases the power of port0 and port1 of the CRS ports in the central bandwidth.

[0083] In step 204, the serving cell identifies the target terminal.

[0084] After the serving cell increases the power with the central bandwidth, after the first terminal that receives the first message sets the measurement bandwidth as the central bandwidth, the measured channel quality also increases. However, in the actual application process, the first terminal includes a second terminal and a target terminal. The second terminal is a terminal that supports the first message, and the target terminal is a terminal that does not support the instruction of the first message. That is, after receiving the first message, the second terminal sets the measurement bandwidth of the second terminal as the central bandwidth based on the instruction information in the first message. After receiving the first message, since the first message is not supported by the protocol, the target terminal does not set the measurement bandwidth of the target terminal as the central bandwidth based on the instruction information in the first message. Therefore, for this type of target terminal, the serving cell first identifies the target terminal in the first terminal and then performs corresponding management.

[0085] In the actual application process, in one possible implementation, the fact that the target terminal does not support the instruction information of the first message is represented as the target terminal does not support the instruction information of the first message sent by the serving cell. However, during the adjacent cell measurement, if the adjacent cell is set to increase the power of the central bandwidth, the target terminal can perform the measurement based on the resources of the central bandwidth configured for the adjacent cell. In this way, if the measurement result is larger than the measurement result of the serving cell, the target terminal is handed over to the adjacent cell, and the target terminal performs channel measurement on the serving cell (that is, the adjacent cell before handover) based on the full bandwidth and performs channel measurement on the adjacent cell (that is, the serving cell before handover) based on the central bandwidth. Therefore, the value obtained through the channel measurement of the current serving cell is smaller than the value obtained through the channel measurement of the adjacent cell, and as a result, the target terminal is handed back to the serving cell. In this process, the target terminal can repeatedly perform handovers, resulting in ping-pong handovers.

[0086] For example, as shown in FIG. 7, the target terminal is located between cell cell-1 and cell cell-2. When the target terminal is connected to cell cell-1, the bandwidth for measurements performed by the target terminal on cell cell-1 is the full bandwidth, and the bandwidth for measurements on cell cell-2 is the center bandwidth set for cell cell-2, that is, the center bandwidth of 6 RBs. After cell cell-2 increases the power of the center bandwidth, the channel quality measured by the target terminal in cell cell-2 increases. Therefore, the target terminal is handed over to cell cell-2. When the target terminal is connected to cell cell-2, the bandwidth for measurements performed by the target terminal on cell cell-2 is the full bandwidth, and the bandwidth for measurements performed by the target terminal on cell cell-1 is the center bandwidth set for cell cell-1, that is, the center bandwidth of 6 RBs. After cell cell-1 increases the power of the center bandwidth, the channel quality measured by the target terminal in cell cell-1 increases. Therefore, the target terminal is handed over to cell cell-1 again. In this case, ping-pong handover occurs.

[0087] To avoid ping-pong handover, the serving cell needs to first identify the target terminal in the first terminal and then perform corresponding management.

[0088] Specifically, in one possible implementation, after the first terminal accesses the serving cell, the serving cell starts a timer. The time range of the timer is a preset threshold. The preset threshold may be an empirical value or a value specified by a protocol. This is not particularly limited here. Before the timer expires, if the first terminal is handed over to the target cell and the target cell is an adjacent cell, the serving cell determines that the target terminal is a target terminal that does not support the instruction of the first message.

[0089] For example, as shown in FIG. 8, when the terminal is handed over from cell1 to cell2, cell1 starts a timer. If the terminal is handed over from cell2 to cell1 before the timer expires, the terminal is determined to be the target terminal.

[0090] In one possible implementation, the serving cell may compare a first measurement value of the target terminal with a second measurement value of the target terminal to obtain a measurement difference. If the measurement difference is greater than a preset threshold, the serving cell determines that the target terminal is a terminal that does not support the instruction of the first message. The first measurement value is a value obtained by measuring the channel quality of the serving cell before the target terminal is handed over to the serving cell, and the second measurement value is a value obtained by measuring the channel quality of the serving cell after the target terminal is handed over to the serving cell.

[0091] In the actual application process, the first measurement value and the second measurement value may be the RSRP or RSRQ measured by the target terminal of the serving cell. This is not particularly limited here.

[0092] When the serving cell and the target cell are different cells covered by the same base station, the serving cell can directly obtain the first measurement value and the second measurement value of the target terminal. As shown in FIG. 9, when the serving cell (cell-2) and the target cell (cell-1) are different cells covered by different base stations, the serving cell obtains the first measurement value measured when the target terminal is connected to the target cell from the target cell via the X2 interface, and can compare the first measurement value with the second measurement value in order to finally determine whether the target terminal is a terminal that does not support the instruction of the first message. In the actual application process, it is understood that the serving cell may further obtain the first measurement value from the target cell in another way, for example, obtaining the first measurement value from the upper layer signaling transmitted by the target cell to the serving cell. This is not particularly limited here.

[0093] In step 205, the serving cell obtains the first measurement compensation information.

[0094] After the serving cell identifies the target terminal, the serving cell obtains the first measurement compensation information. The first measurement compensation information is used to compensate the measurement value of the target terminal so that the target terminal can maintain the connection to the serving cell.

[0095] Specifically, in one possible implementation, the first measurement compensation information can include a measurement compensation value for the serving cell. When the target terminal performs channel measurement on the serving cell, the measurement compensation value is added to the measurement value obtained by performing channel measurement by the target terminal on the serving cell. In this way, the measurement value of the serving cell measured by the target terminal can be increased, and the terminal can continue to connect to the serving cell.

[0096] When the target terminal performs a cell handover, the target terminal further measures the channel quality of the target cell. Therefore, if the channel quality of the target cell is better, the target terminal still performs a cell handover. In one possible implementation, the serving cell may further carry a handover hysteresis value in the first measurement compensation information. Specifically, when the target terminal performs a cell handover, the target terminal subtracts the handover hysteresis value from the measurement value of the target cell to obtain the final measurement value of the target cell. Therefore, after the handover hysteresis value is added, the measurement value of the target cell measured by the target terminal may be smaller than the measurement value of the serving cell. Therefore, the target terminal can continue to maintain the connection to the serving cell.

[0097] For example, as shown in FIG. 10, when the target terminal is connected to cell-1, the measured value RSRPs of cell-1 measured by the target terminal is equal to the measurement value of the entire bandwidth of RSRPcell-1, and the measured value RSRPn of cell-2 measured by the target terminal is equal to the measurement value of the central bandwidth (6RB) of RSRPcell-2. The target terminal determines whether to perform a handover according to the following formula. RSRPs + offset + measurement compensation value > RSRPn - handover hysteresis value

[0098] If the sum obtained by adding the measured value RSRPs of the serving cell, the offset value, and the measurement compensation value is greater than the difference obtained by subtracting the handover hysteresis value from the measured value RSRPn, it indicates that the target terminal continues to camp on the serving cell and does not perform a handover.

[0099] It should be noted that the first measurement compensation information may be compensated in the serving cell or on the terminal side. When the compensation is executed on the terminal side, the serving cell transmits the first measurement compensation information to the terminal. After receiving the first measurement compensation information, the terminal performs related calculations regarding the channel quality based on the first measurement compensation information.

[0100] In step 206, the serving cell determines whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal.

[0101] The serving cell may transmit the first measurement compensation information to the target terminal so that the target terminal can continue to maintain the connection to the serving cell. However, in the actual application process, when the quality of the link between the target terminal and the serving cell is excessively low, there may be occurrences such as cold drops or connection failures at the target terminal. Therefore, the serving cell needs to further determine whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal.

[0102] Specifically, the serving cell can measure the uplink quality and the downlink quality of the target terminal by means of downlink CQI measurement or uplink RSRP measurement, etc. When either the uplink quality or the downlink quality is less than the preset threshold, or when both the uplink quality and the downlink quality are less than the preset threshold, the target terminal is determined to be a low-efficiency user, and a cell handover is initiated for the target terminal to prevent cold drops or handover failures caused by delayed handovers.

[0103] Specifically, the serving cell can send a handover command to the target terminal, where the handover command instructs the target terminal to perform a cell handover. After receiving the handover command, the target terminal can start cell measurements to measure the channel quality of cells other than the serving cell and select a target cell with better channel quality to start the cell handover.

[0104] In the present embodiment of the present application, the purpose is to increase the coverage of the AAU cell. As shown in FIG. 11, when the coverage of the same AAU is divided into multiple cells and the multiple cells simultaneously send the first measurement compensation information to the target terminal, a behavior of preempting the user (the first terminal) between cells may be caused. Therefore, the user may access a sub-optimal cell. Therefore, in one possible implementation, when a user within the coverage of the same AAU is handed over within the range of multiple cells obtained by dividing the coverage of the AAU, a determination is made using the first measurement value and the second measurement value based on the uplink RSRP measurement. Specifically, when the serving cell and the target cell are cells corresponding to the same AAU, in order to avoid the ping-pong handover caused by using the downlink measurement reporting method, the measurement is performed based on the uplink RSRP.

[0105] In the present embodiment of the present application, the serving cell sends a first message used to set the measurement bandwidth as the central bandwidth to the first terminal, reduces the power of the second bandwidth, and increases the power of the central bandwidth. As a result, the first terminal receives a stronger measurement signal based on the fact that the measurement bandwidth is the central bandwidth. Thereby, the coverage of the signal of the serving cell is improved.

[0106] The above describes the power adjustment method in the embodiment of the present application. The following describes the serving cell in the present application.

[0107] FIG. 12 is a schematic diagram of the structure of a serving cell according to an embodiment of the present application.

[0108] The serving cell includes a transmission unit 1201 configured to transmit a first message to a first terminal, the first message instructing the first terminal to configure the first measurement bandwidth as the central bandwidth, the frequency range of the central bandwidth being smaller than the frequency range of the entire bandwidth, the entire bandwidth representing the maximum bandwidth allocated to the serving cell, and the first measurement bandwidth being the bandwidth used by the first terminal to measure the channel quality, the transmission unit 1201; a reduction unit 1202 configured to reduce power in a second bandwidth, the frequency range of the second bandwidth being a frequency range obtained by subtracting the frequency range of the central bandwidth from the frequency range of the entire bandwidth, the reduction unit 1202; an increase unit 1203 configured to increase the power of the central bandwidth and includes.

[0109] In the present embodiment of the present application, the method executed by the unit of the serving cell is the same as the method executed by the serving cell of the embodiment shown in FIG. 2. Details are not repeated here.

[0110] FIG. 13 is a schematic diagram of another structure of a serving cell according to an embodiment of the present application.

[0111] The serving cell includes a transmission unit 1301 configured to transmit a first message to a first terminal, the first message instructing the first terminal to configure the first measurement bandwidth as the central bandwidth, the frequency range of the central bandwidth being smaller than the frequency range of the entire bandwidth, the entire bandwidth representing the maximum bandwidth allocated to the serving cell, and the first measurement bandwidth being the bandwidth used by the first terminal to measure the channel quality, the transmission unit 1301; A reduction unit 1302 configured to reduce power at a second bandwidth, wherein the frequency range of the second bandwidth is a frequency range obtained by subtracting the frequency range of a central bandwidth from the frequency range of an entire bandwidth, the reduction unit 1302 An increase unit 1303 configured to increase power at the central bandwidth and includes

[0112] Optionally, the increase unit 1303 is specifically configured to increase the power of a cell-specific reference signal CRS port at the central bandwidth, where the CRS port is configured to transmit a CRS signal, and the CRS signal is used by a first terminal to measure channel quality.

[0113] Optionally, the CRS port includes CRS port 0 and CRS port 1, and the increase unit is specifically configured to increase the power of CRS port 0 and CRS port 1 at the central bandwidth.

[0114] Optionally, the reduction unit 1302 is specifically configured to reduce the power of the CRS port at the second bandwidth, where the CRS port is used to transmit a CRS signal, and the CRS signal is used by a first terminal to measure channel quality.

[0115] Optionally, the CRS port includes CRS port 2 and CRS port 3, and the reduction unit is specifically configured to reduce the power of CRS port 2 and CRS port 3 at the second bandwidth.

[0116] Optionally, the first terminal includes a target terminal, and the target terminal is a terminal that does not support an instruction of a first message. The serving cell an identification unit 1304 configured to identify the target terminal An acquisition unit 1309 configured to acquire first measurement compensation information, wherein the first measurement compensation information is used to compensate a measurement value of a target terminal, so that the target terminal continues to be connected to a serving cell, the acquisition unit 1309 further comprises.

[0117] Optionally, when the target terminal accesses the serving cell, the serving cell a start unit 1305 configured to start a timer further comprises.

[0118] If the target terminal is handed over to the target cell before the timer expires, the serving cell a determination unit 1306 configured to determine that the target terminal is a terminal that does not support the instruction of the first message and the target cell is an adjacent cell further comprises.

[0119] Optionally, the identification unit 1304 is specifically configured to compare a first measurement value of the target terminal with a second measurement value of the target terminal to obtain a measurement difference, wherein the first measurement value is a value obtained by measuring the channel quality of the serving cell before the target terminal is handed over to the serving cell, and the second measurement value is a value obtained by measuring the channel quality of the serving cell after the target terminal is handed over to the serving cell.

[0120] If the measurement difference is greater than a preset threshold, the determination unit 1306 is specifically configured to determine that the target terminal is a terminal that does not support the instruction of the first message.

[0121] Based on the serving cell of the second aspect, in one possible implementation, the serving cell A receiving unit configured to receive a first measurement value transmitted by a target cell, the first measurement value being a value obtained by measuring the channel quality of a serving cell when the terminal is connected to the target cell, receiving unit 1307 further includes.

[0122] Optionally, the serving cell and the target cell are cells corresponding to the same active antenna array AAU, and the first measurement value and the second measurement value are measured based on the uplink RSRP of the serving cell.

[0123] Optionally, the serving cell a determination unit 1308 configured to determine whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal further includes.

[0124] If either the uplink quality of the target terminal or the downlink quality of the target terminal is less than a preset threshold, the transmission unit 1301 is further configured to transmit a handover command to the target terminal, where the handover command instructs the target terminal to perform a cell handover.

[0125] In the present embodiment of the present application, the method executed by the unit of the serving cell is the same as the method executed by the serving cell in the embodiment shown in FIG. 2. Details are not repeated here.

[0126] FIG. 14 is a schematic diagram of another structure of a serving cell according to an embodiment of the present application.

[0127] The serving cell includes a processor 1401, a memory 1402, a bus 1405, and an interface 1404. The processor 1401 is connected to the memory 1402 and the interface 1404, the bus 1405 is separately connected to the processor 1401, the memory 1402, and the interface 1404, the interface 1404 is configured to receive or transmit data, and the processor 1401 is a single-core or multi-core central processing unit, or an application-specific integrated circuit, or one or more integrated circuits configured to implement the present embodiment of the present invention. The memory 1402 may be a random access memory (RAM), or may be a non-volatile memory, for example, at least one hard disk memory. The memory 1402 is configured to store computer-executable instructions. Specifically, the computer-executable instructions may include a program 1403.

[0128] In this embodiment, when the processor 1401 calls the program 1403, the serving cell in FIG. 14 is enabled to execute the operations executed by the serving cell in the embodiment shown in FIG. 2. Details are not repeated here.

[0129] The processor referred to in the serving cell described in the foregoing embodiments in the present application, or the processor provided in the foregoing embodiments of the present application, may be a central processing unit (CPU), or may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or another programmable logic device, an individual gate or transistor logic device, an individual hardware component, etc. It should be understood that the general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0130] It should be further understood that in the foregoing embodiments of the present application, one or more processors may exist in the serving cell. The number of processors may be adjusted based on the actual application scenario, and is only an example for the description in this specification and is not limited. In the embodiments of the present application, one or more memories may exist. The number of memories may be adjusted based on the actual application scenario. This is only an example for the description here and is not limited.

[0131] It should be further noted that when the serving cell includes a processor (or processing unit) and a memory, the processor of the present application may be integrated with the memory, or the processor may be connected to the memory via an interface. This may be adjusted based on the actual application scenario and is not limited here.

[0132] This application provides a chip system. The chip system includes a processor configured to implement the functions of the controller in the foregoing method, for example, to support a serving cell when processing data and / or information in the foregoing method. In one possible design, the chip system further includes a memory. The memory is configured to store necessary program instructions and necessary data. The chip system may include a chip, or may include a chip and another discrete component.

[0133] In another possible design, when the chip system is a chip in a user device, an access network, etc., the chip includes a processing unit and a communication unit. The processing unit can be, for example, a processor, and the communication unit can be, for example, an input / output interface, a pin, or a circuit. The processing unit can execute computer-executable instructions stored in a storage unit so as to execute steps executed by any one of the first serving cells in the embodiments of FIG. 3 or FIG. 4, such as a chip in a serving cell. Optionally, the storage unit is a storage unit within the chip, such as a register or a cache. Alternatively, the storage unit may be a storage unit located outside the chip within the serving cell, such as a read-only memory (ROM) or another type of static storage device capable of storing static information and instructions, or a random access memory (RAM).

[0134] One embodiment of this application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. The computer program is executed by a computer to implement the method steps executed by the controller of the serving cell in any one of the foregoing method embodiments. Correspondingly, the computer may be the foregoing serving cell.

[0135] The controller or processor described in the foregoing embodiments of the present application may be a central processing unit (CPU), or may be another general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or one or a combination of more of the following: another programmable logic device, an individual gate or transistor logic device, an individual hardware component, etc. It should be understood that the general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0136] In the foregoing embodiments of the present application, it should be further understood that one or more processors or controllers may be present in a serving cell or a chip system, etc. The number of processors or controllers may be adjusted based on the actual application scenario, and is only an example for the description in this specification and is not limited. In the embodiments of the present application, one or more memories may be present. The number of memories may be adjusted based on the actual application scenario. This is merely an example for the description herein and is not limited.

[0137] It should be further understood that memories such as the serving cell mentioned in the foregoing embodiments of the present application, readable storage media, etc. may be volatile memories, non-volatile memories, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM) used as an external cache. By way of example and not limitation, many forms of RAM may be used, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0138] Those skilled in the art can understand that all or some of the steps executed by the serving cell or the processor 2102 in the foregoing embodiments may be implemented by hardware or a program that instructs the related hardware. The program may be stored in a computer-readable storage medium. The above storage medium may be a read-only memory, a random access memory, etc. Specifically, for example, the foregoing processing unit or processor may be a central processing unit, a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Whether these functions are executed by hardware or software depends on the specific application of the technical solution and the design constraints. Those skilled in the art may use different methods to implement the functions described for each specific application, but the implementation forms should not be considered to exceed the scope of this application.

[0139] When software is used to implement the embodiments, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the procedures or functions according to the embodiments of this application are generated. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a certain website, computer, server, or data center to another website, computer, server, or data center in a wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, or microwave) manner. The computer-readable storage medium may be any usable medium accessible by a computer or a data storage device such as a server or a data center that integrates one or more usable media. The usable media may be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium (e.g., a DVD), a semiconductor medium, etc.

[0140] In the description, claims, and appended drawings of this application, terms such as "first", "second", etc. are used to distinguish similar objects and do not necessarily indicate a specific order or sequence. Terms used in this way are interchangeable in appropriate circumstances, and it should be understood that this is merely a way of distinguishing when describing objects having the same attributes in the embodiments of this application. Additionally, the terms "comprising", "containing", and any other variants mean that a process, method, system, product, or device that includes a series of units is not necessarily limited to those units, and may include other units not explicitly listed or specific to such a process, method, system, product, or device, which corresponds to non-exclusive inclusion.

[0141] The terms used in the embodiments of this application are merely for indicating specific embodiments and are not intended to limit the present invention. The singular forms "One" and "the" used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise. In the description of this application, it should be further understood that " / " represents an "or" relationship between related objects unless otherwise specified. For example, A / B may represent A or B. In this application, the term "and / or" simply represents the relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent the following three cases, namely, the case where only A exists, the case where both A and B exist, and the case where only B exists, and in that case, A and B may each be singular or plural.

[0142] Depending on the context, for example, the phrase "if" as used herein may be described as "while" or "when" or "in response to determining" or "in response to detection" or the like. Similarly, depending on the context, the phrase "when determining" or "when detecting (a stated state or event)" may be described as "when determining", or "in response to determining" or "when detecting (a stated state or event)" or "in response to detecting (a stated state or event)" or the like.

[0143] Finally, the foregoing embodiments are merely for explaining the technical solutions of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can further modify the technical solutions described in the foregoing embodiments or perform equivalent replacements of some of their technical features without departing from the scope of the technical solutions of the embodiments of this application.

Explanation of Reference Numerals

[0144] 1201 Transmission Unit 1202 Reduction Unit 1203 Increase Unit 1301 Transmission Unit 1302 Reduction Unit 1303 Increase Unit 1304 Identification Unit 1305 Start Unit 1306 Determination Unit 1307 Reception Unit 1308 Judgment Unit 1309 Acquisition Unit 1401 Processor 1402 Memory 1403 Program 1404 Interface 1405 Bus 2102 Processor

Claims

1. A power adjustment method in a base station, comprising: Transmitting a first message to a first terminal, wherein the first message instructs the first terminal to configure a first measurement bandwidth as a center bandwidth, the frequency range of the center bandwidth is smaller than the frequency range of the entire bandwidth, the entire bandwidth represents the maximum bandwidth allocated to a serving cell, and the first measurement bandwidth is the bandwidth used by the first terminal to measure channel quality; Reducing power in a second bandwidth, wherein the frequency range of the second bandwidth is obtained by subtracting the frequency range of the center bandwidth from the frequency range of the entire bandwidth; Increasing the power of the center bandwidth; And The first terminal includes a second terminal and a target terminal, the second terminal is a terminal that supports the first message, and the target terminal is a terminal that does not support the instruction of the first message; Identifying the target terminal; Obtaining first measurement compensation information, wherein the first measurement compensation information includes a measurement compensation value for the serving cell, and adding the measurement compensation value to the measurement value of the target terminal to maintain the connection of the target terminal to the serving cell; The power adjustment method further comprising.

2. The step of increasing power in the center bandwidth is Increasing the power of a cell-specific reference signal (CRS) port in the center bandwidth, wherein the CRS port is used to transmit a CRS signal, and the CRS signal is used by the first terminal to measure channel quality; The method according to claim 1, comprising the step.

3. The CRS port comprises CRS port 0 and CRS port 1, and the step of increasing the power of the CRS port in the center bandwidth is Increasing the power of the CRS port 0 and the CRS port 1 in the center bandwidth The method according to claim 2, comprising the step.

4. The step of reducing power in the second bandwidth is Reducing the power of the CRS port at the second bandwidth, wherein the CRS port is configured to transmit a CRS signal, and the CRS signal is used by the first terminal to measure channel quality The method according to claim 2 or 3, comprising: **Claim 5** The CRS port includes CRS port 2 and CRS port 3, and the step of reducing the power of the CRS port at the second bandwidth is Reducing the power of CRS port 2 and CRS port 3 at the second bandwidth The method according to claim 4, comprising: **Claim 6** The step of identifying the target terminal is Starting a timer when the target terminal accesses the serving cell; and If the target terminal is handed over to the target cell before the timer expires, determining that the target terminal is the terminal that does not support the instruction of the first message, and the target cell is an adjacent cell The method according to claim 1, comprising: **Claim 7** The step of identifying the target terminal is Comparing a first measurement value of the target terminal with a second measurement value of the target terminal to obtain a measurement difference, wherein the first measurement value is a value obtained by measuring the channel quality of the serving cell before the target terminal is handed over to the serving cell, and the second measurement value is a value obtained by measuring the channel quality of the serving cell after the target terminal is handed over to the serving cell; and Determining that the target terminal is the terminal that does not support the instruction of the first message when the measurement difference is greater than a preset threshold The method according to claim 1 or 6, comprising: **Claim 8** The step of identifying the target terminal is A step of comparing a first measurement value of the target terminal and a second measurement value of the target terminal to obtain a measurement difference, wherein the first measurement value is a value obtained by measuring the channel quality of the serving cell before the target terminal is handed over to the serving cell, and the second measurement value is a value obtained by measuring the channel quality of the serving cell after the target terminal is handed over to the serving cell, and when the measurement difference is greater than a preset threshold, determining that the target terminal is a terminal that does not support the instruction of the first message including The method according to claim 6, wherein the serving cell and the target cell are cells corresponding to the same active antenna array AAU, and the first measurement value and the second measurement value are measured based on the uplink RSRP of the serving cell.

9. The method is determining whether the target terminal performs a cell handover based on the uplink quality of the target terminal and the downlink quality of the target terminal; and when either the uplink quality of the target terminal or the downlink quality of the target terminal is less than the preset threshold, sending a handover command to the target terminal, the handover command instructing the target terminal to perform a cell handover The method according to claim 7 or 8, further including

10. A communication device configured to perform the method according to any one of claims 1 to 9.

11. A computer-readable storage medium configured to store instructions, wherein when the instructions are executed, the method according to any one of claims 1 to 9 is implemented.

13. A computer program, wherein when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 9.

14. A base station including the device according to claim 10, a cell covered by the base station, and a terminal covered by the cell comprising a data transmission system.

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