Energy saving method and related device

Abstract

This application discloses an energy-saving method and related apparatus applicable to an energy-saving scenario of a base station. The method includes a step in which a network device determines a target symbol within a multimedia broadcast multicast service single frequency network (MBSFN) subframe of a first cell. The target symbol is a cell-specific reference signal (CRS) symbol, a demodulation reference signal (DMRS) symbol, a physical downlink control channel (PDCCH) symbol dedicated to a user equipment (UE), and a physical downlink shared channel (PDSCH) symbol dedicated to the UE. When the load of the first cell is lower than a preset threshold, the network device reduces the transmission power of the target symbol. When the load of the first cell is higher than the preset threshold, the network device increases the transmission power of the target symbol. In this application, the overall transmission power of the cell is adjusted by simultaneously adjusting the transmission powers of the four types of symbols, and the UE does not need to be notified via an air interface message. Therefore, the overall transmission power of the cell can be adjusted quickly, and the service stability of the base station can be guaranteed while realizing energy saving.

Description

Technical Field

[0001] This application claims the priority of Chinese Patent Application No. 202210912704.0, entitled "Energy Saving Method and Related Device", filed with the State Intellectual Property Office of China on July 30, 2022, the entire content of which is incorporated herein by reference.

[0002] This application relates to the field of communications, and in particular, to an energy saving method and related device.

Background Art

[0003] With the development of communication technology, Long Term Evolution (LTE) has become the mainstream wireless communication standard, carrying a large amount of data and a large amount of voice services. Evolved NodeB (eNB) accounts for a large proportion of the base stations of all operators and is an important source of revenue for operators. However, the large-scale energy consumption of eNB also accounts for a high proportion of the energy consumption of operators. Therefore, operators are eager to further reduce the energy consumption of eNB.

[0004] A method for reducing the energy consumption of eNB is to reduce the transmission power of the cell when the cell of the eNB has a low load, thereby reducing the energy consumption of the eNB. In the case of the cell of the eNB, the Cell-specific Reference Signal (CRS) occupies a large amount of air interface resources, and during the low load period, the CRS consumes a large amount of energy. Therefore, in order to reduce the transmission power of the cell, the transmission power of the CRS needs to be reduced first.

[0005] Currently, a common method to reduce the transmission power of CRS is to fixedly reduce the CRS power configuration of the cell. However, when reducing the transmission power of the CRS symbol, the power bias difference changes, which does not match the power bias difference previously notified to the UE. The UE cannot handle this situation. Therefore, in this way, the terminal device needs to be notified in advance of the change in the power bias difference via the air interface message. However, the response time of the air interface message is usually long, at the level of hundreds of milliseconds or even at the level of several seconds. As a result, the transmission power of the CRS cannot be adjusted quickly. When the load of the cell increases rapidly, the transmission power of the CRS cannot be restored in a timely manner. That is, the response time cannot adapt to rapid traffic changes.

Summary of the Invention

Means for Solving the Problems

[0006] This application provides an energy-saving method and related device for quickly adjusting the transmission power of a cell.

[0007] The network device determines the target symbol in the Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN) subframe of the first cell. The target symbol is the cell-specific reference signal CRS symbol, the demodulation reference signal DMRS symbol, the physical downlink control channel PDCCH symbol dedicated to the terminal device UE, and the physical downlink shared channel PDSCH symbol dedicated to the UE. When the load of the first cell is lower than the preset threshold, the network device reduces the transmission power of the target symbol. When the load of the first cell is higher than the preset threshold, the network device increases the transmission power of the target symbol.

[0008] The energy-saving method provided in the first aspect is applicable to both the frequency division duplex (FDD) mode and the time division duplex (TDD) mode. In the FDD mode, subframes 0, 4, 5, and 9 are always non-MBSFN subframes. In other words, the MBSFN subframes can be subframes 1, 2, 3, 6, 7, and 8. In the TDD mode, when the uplink-downlink subframe configuration is 1, the MBSFN subframes can occupy subframes 4 and 9. When the uplink-downlink subframe configuration is 2, the MBSFN subframes can occupy subframes 3, 4, 8, and 9. When the uplink-downlink subframe configuration is 5, the MBSFN subframes can occupy subframes 3, 4, 7, 8, and 9. In addition, subframes 2 and 7 can be uplink subframes. Therefore, since subframes 0, 1, 5, and 6 are always normal subframes, the MBSFN subframes can be downlink subframes within subframes 3, 4, 7, 8, and 9.

[0009] The network device can monitor the instantaneous load status of the first cell in real time (e.g., at the millisecond level), and the status includes, but is not limited to, uplink service load, downlink service load, data buffer size, number of users, etc. When the load of the first cell is lower than a preset threshold, it indicates that the first cell is in a low-traffic state. In this case, the first cell usually does not require transmission power in the normal state, and the network device reduces the transmission power of the first cell by reducing the transmission power of the target symbol. When the network device detects by monitoring that the load of the first cell is higher than the preset threshold, this indicates that the service requirements of the first cell have increased, and the network device increases the transmission power of the target symbol and restores the transmission power of the target symbol to the state before power reduction. Naturally, the network device may alternatively further increase the transmission power of the target symbol based on the actual load status of the first cell. For example, when the load of the first cell is much higher than the preset threshold, the network device may increase the power of the target symbol more instead of simply restoring the transmission power of the target symbol to the level before power reduction.

[0010] Specifically, the method for adjusting the transmission power of the target symbol (including reduction and increase) by the network device is to simultaneously adjust the transmission power of four types of symbols: the cell-specific reference signal CRS symbol, the demodulation modulation reference signal (DMRS) symbol, the physical downlink control channel (PDCCH) symbol dedicated to the user equipment (UE), and the physical downlink shared channel (PDSCH) symbol dedicated to the UE.

[0011] In the first aspect of the present application, the network device adjusts the transmission power of the cell by simultaneously adjusting the transmission powers of four types of symbols: CRS symbols, DMRS symbols, UE-specific PDCCH symbols, and UE-specific PDSCH symbols. When the powers of these symbols are adjusted together, the UE can understand the power adjustment as usual, and the UE can process the service as usual. Therefore, it is not necessary to specially configure the MBSFN subframe in the first cell. When the UE does not need to be notified via an air interface message (e.g., a system message or Radio Resource Control (RRC) signaling) that the transmission power of the first cell has been reduced, the overall transmission power of the cell can be adjusted quickly. Therefore, according to the energy-saving method provided in the first aspect of the present application, the service fluctuations of the cell can be quickly followed, and a stable user experience can be guaranteed while achieving energy savings.

[0012] In a possible implementation of the first aspect, the MBSFN subframe does not carry the System Information Block (SIB) message, Paging message, message 2 (MSG2), or message 4 (MSG4) of the first cell. In this possible implementation, it is limited that the MBSFN subframe where the target symbol is located does not carry cell-common messages. When the MBSFN subframe is used to carry cell-common messages, the transmission power of all symbols in the subframe is not reduced. That is, none of the symbols is a target symbol. Therefore, the normal implementation of basic functions such as the reception of paging messages and the start of access requests by the UE is not affected.

[0013] In a possible implementation of the first aspect, the target symbol does not include symbols within the Physical Control Format Indicator Channel (PCFICH) and the Physical Hybrid ARQ Indicator Channel (PHICH), or the common PDCCH symbols of the cell and the Channel State Information Reference Signal (CSIRS) symbols. In this possible implementation, the specific content of the target symbol is limited, and as a result, the implementation of the basic functions of the cell may not be affected.

[0014] In a possible implementation of the first aspect, the PDSCH symbol does not include the Voice over Long-Term Evolution (VoLTE) symbol, the Signaling Radio Bearer 1 (SRB1) symbol, or the Signaling Radio Bearer 2 (SRB2) symbol. In this possible implementation, the specific content of the target symbol is limited, and as a result, the implementation of the basic functions of the cell may not be affected.

[0015] In a possible implementation of the first aspect, the CRS symbol is located outside the position of symbol 0 of the MBSFN subframe.

[0016] In some cases, a UE in a cell adjacent to the first cell measures the coverage strength of the first cell using the CRS symbol located at the position of symbol 0 in the MBSFN subframe, for example, measures the reference signal received power (RSRP) or the reference signal received quality (RSRQ). In this possible implementation, it is limited that the CRS symbol included in the target symbol is located outside the position of symbol 0 of the MBSFN subframe. Therefore, reducing the transmission power of the target symbol does not affect the result of measuring the coverage of the first cell by the UE in the neighboring cell, and does not affect mobility functions such as reselection of the UE in the neighboring cell and handover to the current cell.

[0017] In a possible implementation of the first aspect, the method further includes a step in which a network device transmits a target message to a second cell. The target message indicates that an evolved multimedia broadcast multicast service (eMBMS) cell exists in a neighboring cell having a handover relationship with the second cell, and for the second cell, the neighboring cells of the second cell also include the first cell.

[0018] The network device notifies a neighboring cell (i.e., the second cell) of the first cell that an Evolved Multimedia Broadcast Multicast Service (eMBMS) neighboring cell exists in the vicinity through a pseudo message (i.e., a target message). After the second cell knows that the eMBMS neighboring cell exists, the second cell notifies the UEs within the second cell through a system message. As a result, when measuring the signal of the neighboring cell, the UEs within the second cell measure only the CRS symbols within the non-MBSFN subframes of the neighboring cell. The network device does not reduce the transmission power of the symbols within the non-MBSFN subframes of the first cell. Therefore, before and after the network device adjusts the transmission power of the first cell, the intensity of the signal of the first cell obtained through measurement by the UEs within the second cell does not change, thereby ensuring that mobility functions such as reselection and handover of the UEs within the second cell to the first cell can remain normal.

[0019] In a possible implementation of the first aspect, before the step of the network device reducing the transmission power of the target symbol, the method further includes the step of the network device determining that the intensity of the signal received by the UEs within the first cell is higher than the target threshold of the first cell. The target threshold is higher than the minimum access level threshold of the first cell.

[0020] When a network device reduces the transmission power of a target symbol, it may cause a decrease in the coverage signal strength of the first cell, and may prematurely trigger an inter-frequency / inter-system cell handover for a UE originally located near the edge area of the first cell, which may cause KPI risks such as traffic loss or call drop. To avoid this situation as much as possible, the network device sets a target threshold. The target threshold is higher than the minimum access level threshold of the first cell. The network device reduces the transmission power of the target symbol only when the strength of all signals of the UE connected to the first cell is higher than the target threshold. When the strength of the UE's signal is lower than the target threshold, the network device stops reducing the transmission power of the target symbol, and as a result, the coverage signal strength of the first cell is no longer reduced. When the strength of the UE's signal is higher than the target threshold again, the network device continues to reduce the transmission power to ensure that the UE does not prematurely trigger an inter-frequency or inter-system handover due to the decrease in the coverage signal strength, thereby avoiding KPI risks such as traffic loss or call drop.

[0021] In a possible implementation of the first aspect, after the step of the network device reducing the transmission power of the target symbol, the method further includes the step of the network device calculating a compensation amount for the reference signal received power RSRP or the reference signal received quality RSRQ of the first cell. The network device compensates the RSRP or RSRQ reported by the UE in the first cell based on the compensation amount of the RSRP or the compensation amount of the RSRQ.

[0022] When a network device reduces the transmission power of a target symbol, it causes a decrease in the coverage signal strength of the first cell and triggers the UE to perform an intra-frequency cell handover in advance. To avoid, as much as possible, KPI risks such as traffic loss or cold drops that occur when the UE is pre-handovered to another intra-frequency cell, the network device calculates the compensation amount for the RSRP or the compensation amount for the RSRQ of the first cell based on the reduced transmission power, and performs compensation repair on the RSRP or RSRQ value reported by the UE based on the compensation amount. The RSRP or RSRQ value is carried in an intra-frequency handover request event. If the signal strength of the UE in the first cell after compensation repair does not actually meet the intra-frequency handover threshold requirement, the network device does not perform the handover of the UE. The network device actually performs the handover of the UE only when the signal strength of the UE in the first cell after compensation repair is indeed low and can meet the intra-frequency handover threshold requirement. In this possible implementation form, the network device performs compensation repair on the signal strength of the first cell to avoid, as much as possible, the case where the UE in the first cell is pre-handovered to another intra-frequency cell, and can avoid KPI risks such as traffic loss or cold drops.

[0023] In a possible implementation form of the first aspect, the network device reduces the minimum access level threshold of the first cell based on the compensation amount for the RSRP or the compensation amount for the RSRQ.

[0024] In a possible implementation form of the first aspect, the method further includes a step in which the network device reduces the minimum access level threshold of the first cell based on the compensation amount for the RSRP or the compensation amount for the RSRQ.

[0025] A minimum access level threshold is set for each cell. If the RSRP or RSRQ of the first cell, which is obtained by the UE in the idle state through measurement, is less than the access level threshold, the UE in the idle state cannot measure the network signal. Considering this, the network device obtains the compensation amount of the RSRP or the compensation amount of the RSRQ of the first cell, and reduces the minimum access level threshold of the first cell based on the compensation amount of the RSRP or the compensation amount of the RSRQ, so as to ensure that the UE in the idle state is not disconnected from the network when the transmission power of the first cell is reduced. Thereby, traffic and user losses are prevented.

[0026] The second aspect of the present application provides a communication device including a determination module, a reduction module, and an increase module. The determination module is configured to determine a target symbol in a multimedia broadcast multicast service single frequency network MBSFN subframe of the first cell. The target symbols are cell-specific reference signal CRS symbols, demodulation reference signals DMRS symbols, physical downlink control channel PDCCH symbols dedicated to the terminal device UE, and physical downlink shared channel PDSCH symbols dedicated to the UE. The reduction module is configured to reduce the transmission power of the target symbol when the load of the first cell is lower than a preset threshold. The increase module is configured to increase the transmission power of the target symbol when the load of the first cell is higher than a preset threshold.

[0027] In a possible implementation form of the second aspect, the MBSFN subframe does not carry the system information block SIB message, paging message, message 2 MSG2, or message 4 MSG4 of the first cell.

[0028] In a possible implementation of the second aspect, the target symbol does not include symbols in the physical control format indicator channel PCFICH and the physical hybrid automatic repeat indicator channel PHICH, or the common PDCCH symbols and channel state reference signal CSIRS symbols of the first cell.

[0029] In a possible implementation of the second aspect, the PDSCH symbol does not include a voice over long term evolution VoLTE symbol, a signaling radio bearer 1 SRB1 symbol, or a signaling radio bearer 2 SRB2 symbol.

[0030] In a possible implementation of the second aspect, the CRS symbol is located outside the position of symbol 0 of the MBSFN subframe.

[0031] In a possible implementation of the second aspect, the communication device further includes a transmission module configured to transmit a target message to the second cell. The target message indicates that an evolved multimedia broadcast multicast service eMBMS cell exists in a neighboring cell having a handover relationship with the second cell and that the neighboring cell includes the first cell.

[0032] In a possible implementation of the second aspect, the determination module is further configured to determine that the intensity of the signal received by the UE in the first cell is higher than the target threshold of the first cell. The target threshold is higher than the minimum access level threshold of the first cell.

[0033] In a possible implementation of the second aspect, the communication device is configured to calculate a compensation amount for the reference signal received power RSRP or the reference signal received quality RSRQ of the first cell and to compensate the RSRP or RSRQ reported by the UE in the first cell based on the compensation amount for the RSRP or the compensation amount for the RSRQ, and further includes a calculation module.

[0034] In a possible implementation of the second aspect, the reduction module is further configured to reduce the minimum access level threshold of the first cell based on the compensation amount of RSRP or the compensation amount of RSRQ.

[0035] The communication device provided in the second aspect of the present application is configured to execute a method by the method according to the first aspect or any possible implementation of the first aspect.

[0036] The third aspect of the present application further provides a communication device including a processor and a memory. The memory is configured to store instructions. The processor is configured to obtain the instructions stored in the memory and execute a method by the method according to the first aspect or any possible implementation of the first aspect.

[0037] The fourth aspect of the present application provides a computer-readable storage medium. The computer-readable storage medium includes instructions. When the instructions are activated by a computer, the computer executes a method according to the first aspect or any possible implementation of the first aspect.

[0038] The fifth aspect of the present application provides a computer program product including instructions. When the computer program product is activated by a computer, the computer is enabled to execute a method according to the first aspect or any possible implementation of the first aspect.

[0039] The sixth aspect of the present application provides a chip system. The chip system includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a line. The at least one processor is configured to activate a computer program or instructions and execute a communication method by the method according to the first aspect or any possible implementation of the first aspect.

Brief Description of Drawings

[0040]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0041] Embodiments of the present application provide an energy saving method and related devices for quickly adjusting the transmission power of a cell. Embodiments of the present application further provide corresponding computer-readable storage media, computer program products, etc. The following provides a detailed description.

[0042] The following describes embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application. Those skilled in the art will understand that with the evolution of technology and the development of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to solving similar technical problems.

[0043] In the specification, claims, and attached drawings of this application, terms such as "first" and "second" are intended to distinguish similar objects, but do not necessarily indicate a specific order or arrangement. Such named data is interchangeable in appropriate circumstances, and thus it should be understood that the embodiments described in this specification can be implemented in an order other than the order illustrated or described in this specification. In addition, the terms "comprising," "having," and any other variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes an enumeration of steps or units is not necessarily limited to those specifically enumerated steps or units, and may include other steps or units that are not specifically enumerated or are not unique to the process, method, product, or device.

[0044] FIG. 1 is a diagram of the architecture of a communication system according to an embodiment of this application.

[0045] The communication system includes a network device 101 and terminal devices 102, 103, and 104. The network device 101 can manage one or more cells such as cell 105 and cell 106 shown in FIG. 1. Different cells have different coverage signal strengths and frequency domain resources. The network device 101 communicates with the terminal devices 102 and 103 via the wireless transmission resources of cell 105, and communicates with the terminal device 104 via the wireless transmission resources of cell 106. When a handover is triggered, the terminal device 102 may be handed over to cell 106 for connection, and the terminal device 104 may alternatively be handed over to cell 105 for connection. It can be understood that FIG. 1 is only an example. In actual applications, the number of network devices and the number of terminal devices are not limited to this. The network device 101 may alternatively manage more cells, or manage only a single cell. This is not specifically limited in this specification.

[0046] The terminal devices 102, 103, 104 may be devices having a wireless transmission and reception function, or may be chips that can be arranged on any device. The terminal devices may be deployed on land including indoor devices, outdoor devices, handheld devices, and / or in-vehicle devices, may be deployed on the water surface (e.g., on a ship), or may be deployed in the air (e.g., on an airplane, a balloon, or a satellite). The terminal devices may sometimes also be referred to as user equipment (UE), and include handheld devices, in-vehicle devices, wearable devices, or computing devices having a wireless communication function. For example, the terminal device may be a mobile phone, a tablet computer (Pad), or a computer equipped with a wireless transceiver function, or may be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal for industrial control, a wireless terminal for unmanned driving, a wireless terminal for telemedicine, a wireless terminal for a smart grid, a wireless terminal for a smart city, a wireless terminal for a smart home, and / or others.

[0047] The network device 101 is deployed in a wireless access network and can perform wireless communication with the terminal device. For example, it may be an evolved Node B (eNB) of an LTE system, a next generation Node B (gNB) of a new radio (NR) system, or a base transceiver station (BTS) of a global system for mobile communication (GSM) system or a code division multiple access (CDMA) system.

[0048] Currently, the energy consumption caused by the network device 101 accounts for a large proportion in the entire communication system. In order to reduce the energy consumption, it is necessary to reduce the transmission power of the network device 101. Specifically, the transmission power of cell 105 or cell 106 can be reduced. However, currently, during the reduction of the cell's transmission power, the response time is long and it cannot adapt to the rapid changes (generally at the level of 10 milliseconds) of the communication service. Considering this, one embodiment of this application provides an energy-saving method for quickly adjusting the transmission power of the cell.

[0049] It should be noted that the energy-saving method provided in the embodiments of this application is applicable to various communication systems, such as long term evolution (LTE) systems, LTE frequency division duplex systems, LTE time division duplex systems, new radio (NR) systems, future communication systems (such as 6th generation (6G) communication systems), or systems that integrate multiple communication systems. For the sake of easy description, as examples for the description in the embodiments of this application, LTE FDD systems and LTE TDD systems are used. This is not specifically limited in this specification.

[0050] FIG. 2 is a diagram of an embodiment of the energy-saving method according to an embodiment of this application. As shown in FIG. 2, the energy-saving method of this embodiment includes steps 201 to 203.

[0051] 201: The network device determines a target symbol within the MBSFN subframe of the first cell.

[0052] The network device first determines the target symbol. The target symbol is located within the MBSFN subframe, and the target symbols are CRS symbols, DMRS symbols, UE-specific PDCCH symbols, and UE-specific PDSCH symbols.

[0053] The energy saving method provided in this embodiment is applicable to both the LTE FDD mode and the LTE TDD mode. In the FDD mode, since subframes 0, 4, 5, and 9 are always non-MBSFN subframes, the MBSFN subframes can be subframes 1, 2, 3, 6, 7, and 8. In the TDD mode, when the uplink-downlink subframe configuration is 1, the MBSFN subframes can occupy subframes 4 and 9. When the uplink-downlink subframe configuration is 2, the MBSFN subframes can occupy subframes 3, 4, 8, and 9. When the uplink-downlink subframe configuration is 5, the MBSFN subframes can occupy subframes 3, 4, 7, 8, and 9. In addition, subframes 2 and 7 can be uplink subframes. Therefore, since subframes 0, 1, 5, and 6 are always normal subframes, the MBSFN subframes can be downlink subframes within subframes 3, 4, 7, 8, and 9.

[0054] Optionally, in order to prevent the normal execution of the basic functions of the cell from being affected during the reduction of the transmission power of the target symbol, the MBSFN subframe in which the target symbol is located cannot carry an SIB message or a paging message. In addition, the MBSFN subframe cannot carry message 2 (MSG2) or message 4 (MSG4) used for UE access. When the MBSFN subframe is used to carry the common message of the cell, the transmission power of all symbols in the subframe is not reduced, that is, none of the symbols is a target symbol.

[0055] Optionally, the PDSCH symbol determined as the target symbol does not include a VoLTE symbol, an SRB1 symbol, or an SRB2 symbol.

[0056] In some possible solutions, the CRS symbol at the position of symbol 0 in the MBSFN subframe is used by the UEs in neighboring cells to measure the coverage signal strength of the first cell, for example, to measure the RSRP or RSRQ of the first cell. Therefore, the target symbol may alternatively be a CRS symbol in the MBSFN subframe other than the symbol at the position of symbol 0, rather than all CRS symbols in the MBSFN subframe.

[0057] Optionally, the target symbol does not include the symbol in the PCFICH or the symbol in the PHICH. In addition, the target symbol does not include the common PDCCH symbol or the CSIRS symbol of the cell.

[0058] It should be noted that the energy saving method provided in this embodiment is applicable to the processing of the CRS symbols of all ports in the first cell.

[0059] 202: When the load of the first cell is lower than the preset threshold, the network device reduces the transmission power of the target symbol.

[0060] The network device can monitor the instantaneous load situation of the first cell in real time. The situation includes, but is not limited to, uplink service load, downlink service load, data buffer size, the number of users, etc. When the load of the first cell is lower than the preset threshold, it indicates that the first cell is in a low-traffic state. In this case, the first cell does not require transmission power in the normal service state, and the network device reduces the transmission power of the first cell by reducing the transmission power of the target symbol.

[0061] Specifically, the method for adjusting (including reducing and increasing) the transmission power of the target symbol by the network device is to simultaneously adjust the transmission powers of four types of symbols: the CRS symbol, the DMRS symbol, the UE-specific PDCCH symbol, and the UE-specific PDSCH symbol.

[0062] In this embodiment, it should be noted that the network device adjusts the transmission power of the cell by simultaneously adjusting the transmission powers of four types of symbols: the CRS symbol, the DMRS symbol, the UE-specific PDCCH symbol, and the UE-specific PDSCH symbol. When the powers of these symbols are adjusted together, the UE can understand the power adjustment as usual, and the UE can process the service as usual. Therefore, the MBSFN subframe does not need to be specially configured in the first cell, and the UE does not need to be notified via the air interface message that the transmission power of the first cell has been reduced. Therefore, in this embodiment, when the network device monitors the instantaneous load situation of the first cell, the situation determination period can be from several milliseconds to dozens of milliseconds. In the currently commonly used power reduction method, since it is necessary to modify the cell parameter configuration, the response time is long (at a level exceeding seconds (s)), and the damage to coverage and user experience is much more serious compared with that of this embodiment.

[0063] 203: When the load of the first cell is higher than the preset threshold, the network device increases the transmission power of the target symbol.

[0064] When a network device detects, by monitoring, that the load of the first cell is higher than a preset threshold, this indicates that the service requirements of the first cell have been restored to the normal state, and the network device increases the transmission power of the target symbol and restores the transmission power of the target symbol to the state before power reduction. Of course, the network device can alternatively adjust the transmission power of the target symbol based on the actual load situation of the first cell. For example, when the load of the first cell is much higher than the preset threshold, the network device may increase the power of the target symbol more instead of simply restoring the transmission power of the target symbol to the level before power reduction.

[0065] In this embodiment, the network device adjusts the transmission power of the cell by simultaneously adjusting the transmission powers of four types of symbols: the CRS symbol, the DMRS symbol, the UE-specific PDCCH symbol, and the UE-specific PDSCH symbol. When the powers of these symbols are adjusted together, the UE can understand the power adjustment as usual, and the UE can process the service as usual. Therefore, it is not necessary to specially configure the MBSFN subframe in the first cell, and when the UE does not need to be notified, via an air interface message (for example, a system message or Radio Resource Control (RRC) signaling), that the transmission power of the first cell has been reduced, the overall transmission power of the cell can be adjusted quickly. Therefore, according to the energy-saving method provided in the first aspect of this application, the service fluctuations of the cell can be quickly followed, and a stable user experience can be guaranteed while achieving energy savings. In addition, in this embodiment, since the specific content of the target symbol is limited, the normal implementation of basic functions such as receiving a paging message and starting an access request by the UE is not affected.

[0066] Figure 3 is a diagram of another embodiment of the energy saving method according to an embodiment of the present application. In this embodiment, when the transmission power of the first cell is reduced, it can be further guaranteed as much as possible that the first cell does not suffer from traffic and user losses caused by power reduction. The following provides a detailed description with reference to Figure 3. As shown in Figure 3, the energy saving method of this embodiment includes steps 301 to 308.

[0067] 301: The network device determines a target symbol within the MBSFN subframe of the first cell.

[0068] Step 301 in this embodiment is the same as step 201 in the foregoing embodiment shown in Figure 2. Details will not be described again here.

[0069] 302: The network device transmits a target message to the second cell.

[0070] As defined in the protocol 3GPP (registered trademark) TS 36.331, when an evolved multimedia broadcast multicast service (eMBMS) cell exists in the neighboring cells of a cell, the cell notifies the UEs within the cell by means of a system message that the eMBMS neighboring cells exist in the vicinity. Therefore, when measuring the coverage signal strength of neighboring cells, the UEs within the cell measure only the CRS symbols within the non-MBSNF subframes of the neighboring cells.

[0071] Based on this, the network device may send a target message to a neighboring cell (i.e., the second cell) that has a handover relationship with the first cell via the X2 interface. The target message is used to notify the second cell that an eMBMS cell exists in the neighboring cell of the second cell. After the second cell receives the target message, when measuring the coverage signal strength of the first cell, the UE in the second cell measures only CRS symbols in the non-MBSNF subframes of the neighboring cell. The network device does not adjust the transmit power of the symbols. Therefore, the coverage signal strength of the first cell measured by the UE in the second cell before and after the network device adjusts the transmit power of the first cell remains unchanged, and the UE's reselection in the second cell and handover to the first cell are not affected.

[0072] After receiving the target message, the second cell broadcasts the target message to the UEs connected to the second cell through a system message. Specifically, the UEs connected to the second cell can be notified by broadcasting through the neighCellConfig field in the SIB3 and SIB5 messages of the second cell. The field definition is as follows:

[0073] 00: Not all neighbor cells have the same MBSFN subframe allocation as the serving cell on this frequency, if configured, and as the PCell otherwise.

[0074] 10: The MBSFN subframe allocations of all neighbor cells are identical to or subsets of that in the serving cell on this frequency, if configured, and of that in the PCell otherwise. / / The MBSFN subframe allocations of all neighbor cells are identical to or subsets of that in the serving cell on this frequency, if configured, and of that in the PCell otherwise.

[0075] 01: No MBSFN subframes are present in all neighbor cells.

[0076] 11: Different UL / DL allocation in neighboring cells for TDD compared to the serving cell on this frequency, if configured, and compared to the PCell otherwise / There are different UL / DL allocations in neighboring cells for TDD compared to the serving cell on this frequency, if configured, and compared to the primary cell otherwise.

[0077] From the definition of the field, it can be seen that a UE connected to a second cell can be notified of the existence of an eMBMS neighbor cell by configuring the field as 00.

[0078] In some possible solutions, when measuring the coverage signal strength of eMBMS neighboring cells, in addition to measuring the CRS symbols in non-MBSFN subframes, it should be noted that the UE further measures the CRS symbols at the position of symbol 0 in the MBSFN subframe. In this case, in step 301, it is necessary to limit that the target symbol does not include a CRS symbol at the position of symbol 0 of the MBSFN subframe. Otherwise, when the network device reduces the transmission power of the target symbol, the measurement result of the coverage signal strength of the first cell by the UE in the second cell is reduced, which affects the handover of the UE in the second cell to the first cell for connection.

[0079] It can be understood that step 302 can be performed before or after step 303 in which the transmission power of the target symbol is reduced. The chronological order of step 302 is not limited in this specification.

[0080] 303: If the load of the first cell is lower than a preset threshold, the network device reduces the transmission power of the target symbol.

[0081] Step 303 in this embodiment is the same as step 202 in the foregoing embodiment shown in FIG. 2. Details are not described again here.

[0082] 304: The network device reduces the minimum access level threshold of the first cell.

[0083] Reducing the transmission power of the target symbol (CRS symbol) of the first cell causes a decrease in the coverage signal strength of the first cell measured by a UE within the first cell. The coverage signal strength is mainly the RSRP value or the RSRQ value. However, an idle UE does not continuously measure the CRS symbol, and the idle UE remains asleep for a certain period and then wakes up periodically to measure the cell signal. The wake-up time window does not have a fixed length but includes certain normal subframes (i.e., non-MBSFN subframes). This is because normal subframes contain information such as the Master Information Block (MIB), the Primary Synchronization Signal (PSS), and Paging, and the UE needs the information to perform basic functions such as synchronization and paging message reading. Therefore, reducing the transmission power of the target symbol does not cause an idle UE to fail to find the signal of the first cell.

[0084] However, in actual applications, the minimum access level threshold is generally set for a cell, and a decrease in the coverage signal strength causes the RSRP value or RSRQ value obtained by an idle state UE through measurement to be lower than the minimum access level threshold, which may cause the idle state UE to be disconnected from the network. Considering this, after reducing the transmission power of the target symbol, the network device obtains the compensation amount of the RSRP of the first cell or the compensation amount of the RSRQ of the first cell, reduces the minimum access level threshold of the first cell based on the compensation amount of the RSRP or the compensation amount of the RSRQ, and notifies the UE via a system message. As a result, the RSRP value or RSRQ value actually obtained by the UE through measurement is higher than the reduced minimum access level threshold, ensuring that the idle state UE is not disconnected from the network. In step 306, a method for the network device to obtain the compensation amount of the RSRP of the first cell or the compensation amount of the RSRQ of the first cell is described.

[0085] 305: The network device determines that the UE connected to the first cell is within the target threshold.

[0086] For a UE in the connected state, a decrease in the coverage signal strength of the cell may cause the UE in the edge area to be pre-triggered for an inter-frequency or inter-system handover, which affects the cell traffic and the key performance indicator (KPI). For example, a call interruption occurs. Therefore, the UE needs to be prevented from being pre-handovered to an inter-frequency or inter-system cell as much as possible.

[0087] Taking this into account, the network device may set a target threshold. The target threshold is higher than the minimum access level threshold of the first cell. Certainly, in addition to the minimum access level threshold, another threshold that can indicate cell edge characteristics may alternatively be used, which is not particularly limited herein. The network device reduces the transmission power of the target symbol only when the strength of all signals of the UEs connected to the first cell is higher than the target threshold. When the strength of the UE's signal is lower than the target threshold, the network device stops reducing the transmission power of the target symbol, and as a result, the coverage signal strength of the first cell is no longer reduced. When the strength of the signal reported by the UE is higher than the target threshold again, the network device continues to reduce the transmission power to ensure that the UE does not prematurely trigger an inter-frequency or inter-system handover due to a decrease in the coverage signal strength, thereby avoiding KPI risks such as traffic loss or call drop.

[0088] 306: The network device calculates the compensation amount for the first cell and compensates the RSRP or RSRQ reported by the UEs within the first cell based on the compensation amount.

[0089] Compared with inter-frequency or inter-system cell handover, intra-frequency cell handover has less impact on the service, and there are more UEs triggering intra-frequency cell handover. Therefore, it cannot be implemented to immediately stop reducing the transmission power of the target symbol when the UE is outside the target threshold like inter-frequency or inter-system cell handover.

[0090] In the case of intra-frequency cell handover, the network device calculates the ratio of the decrement (in the time dimension) of the CRS symbols at Port0 and Port1 and the ratio of the periodic reduction amplitude, and obtains the compensation amount in a linear calculation method. The compensation amount includes the RSRP compensation value or the RSRQ compensation value and is converted into a value in the dB domain (δ). The following uses the FDD mode as an example for explanation.

[0091] The network device obtains a compensation amount based on the TTI amount (CRS Down TTI), the number of CRS symbols (which is a decrement of 3 or 4 for CRS Down TTI), and the linear power reduction ratio (CRS Down Power Ratio) in order to implement power reduction in historical statistical periodicity. The calculation formula is as follows: RSRP / RSRQ compensation amount δ (dB) = 10×(-log(((CRS Down TTI × 3) × (CRS Down Power Ratio) + CRS Down TTI × 1 + (Total DL Tti - CRS Down TTI) × 3) / (Total DL TTI × 3))) The compensation value is obtained by calculation and is equal to -1.1 dB.

[0092] After obtaining the compensation amount for the first cell through calculation, the network device compensates the RSRP or RSRQ reported by the UE in the first cell based on the compensation amount. The RSRP or RSRQ is carried in the handover request event.

[0093] 307: The network device determines whether the UE needs to be handed over to an in - frequency neighboring cell.

[0094] When triggering an intra-frequency cell handover, the UE in the first cell sends a handover request to the network device. The handover request carries the signal strength (RSRP or RSRQ) of the first cell measured by the UE and the signal strength of the intra-frequency neighboring cells. After performing compensation repair on the RSRP or RSRQ of the first cell measured and reported by the UE, the network device determines whether the UE needs to be handed over to an intra-frequency neighboring cell. Specifically, if the signal strength of the UE in the first cell after compensation check does not actually meet the intra-frequency handover threshold requirement, the network device does not perform the handover of the UE. The network device actually performs the handover of the UE only when the signal strength of the UE in the first cell after compensation check is indeed low and can meet the intra-frequency handover threshold requirement. For example, the intra-frequency handover threshold is 3 dB, the RSRP value of the first cell obtained by the UE through measurement is -95 dBm, the RSRP value of the intra-frequency neighboring cell to be handed over is -91 dBm, and the difference between the two values is greater than 3 dB. However, in this case, since the coverage compensation amount is 2 dB, the RSRP value of the first cell obtained by the UE through measurement is restored to -93 dBm after compensation, and the difference between the RSRP value of the first cell and the RSRP value of the intra-frequency neighboring cell is less than 3 dB. The handover threshold is not actually met, and the network device does not need to perform the handover of the UE.

[0095] 308: When the load of the first cell is higher than the preset threshold, the network device increases the transmission power of the target symbol.

[0096] Step 308 in this embodiment is the same as step 203 in the foregoing embodiment shown in FIG. 2. Details are not described again here.

[0097] In this embodiment, in addition to quickly adjusting the transmission power of a cell, the network device can further maintain the invariant measurement of the cell signal by the UEs in neighboring cells without affecting mobility functions such as reselection of UEs in neighboring cells and handover to cells. In addition, the network device can prevent, as much as possible, the UEs in the cell from being handovered to another cell. This prevents traffic and user losses and guarantees stable basic KPIs such as cold drops and handovers. In addition, the network device can automatically adjust the transmission power of the cell based on a preset cell load threshold, and can further automatically stop reducing the transmission power of the cell or continue to reduce the transmission power of the cell based on the situation of the UEs in the cell without complicated manual intervention and processing, thereby reducing the difficulty of the application.

[0098] The above describes the energy-saving method in the embodiment of the present application. The following describes the communication device in the embodiment of the present application. Please refer to FIG. 4. An embodiment of the communication device in the embodiment of the present application is a determination module 401 configured to determine a target symbol in a multimedia broadcast multicast service single frequency network MBSFN subframe of a first cell, where the target symbol is a cell-specific reference signal CRS symbol, a demodulation reference signal DMRS symbol, a physical downlink control channel PDCCH symbol dedicated to a terminal device UE, and a physical downlink shared channel PDSCH symbol dedicated to the UE, the determination module 401; a reduction module 402 configured to reduce the transmission power of the target symbol when the load of the first cell is lower than a preset threshold; an increase module 403 configured to increase the transmission power of the target symbol when the load of the first cell is higher than a preset threshold and includes.

[0099] The following will describe in detail the communication device according to the embodiments of the present application. Please refer to FIG. 5. Another embodiment of the communication device according to the embodiments of the present application is a determination module 501 configured to determine a target symbol in a multimedia broadcast multicast service single frequency network (MBSFN) subframe of a first cell, where the target symbol is a cell-specific reference signal (CRS) symbol, a demodulation reference signal (DMRS) symbol, a physical downlink control channel (PDCCH) symbol dedicated to a user equipment (UE), and a physical downlink shared channel (PDSCH) symbol dedicated to the UE; a reduction module 502 configured to reduce the transmission power of the target symbol when the load of the first cell is lower than a preset threshold; an increase module 503 configured to increase the transmission power of the target symbol when the load of the first cell is higher than the preset threshold and includes.

[0100] Optionally, the MBSFN subframe does not carry a system information block (SIB) message, a paging message, a message 2 (MSG2), or a message 4 (MSG4) of the first cell.

[0101] Optionally, the target symbol does not include symbols in a physical control format indicator channel (PCFICH) and a physical hybrid automatic repeat request indicator channel (PHICH), or common PDCCH symbols and channel state reference signal (CSIRS) symbols of the first cell.

[0102] Optionally, the PDSCH symbol does not include a voice over long term evolution (VoLTE) symbol, a signaling radio bearer 1 (SRB1) symbol, or a signaling radio bearer 2 (SRB2) symbol.

[0103] Optionally, the CRS symbol is located outside the position of symbol 0 of the MBSFN subframe.

[0104] Optionally, the communication device further includes a transmission module 504 configured to transmit a target message to a second cell. The target message indicates that an evolved multimedia broadcast multicast service (eMBMS) cell exists in a neighboring cell that has a handover relationship with the second cell and that the neighboring cell includes the first cell.

[0105] Optionally, the determination module 501 is further configured to determine that the strength of the signal received by a UE in the first cell is higher than a target threshold of the first cell. The target threshold is higher than the minimum access level threshold of the first cell.

[0106] Optionally, the communication device further includes a calculation module 505 configured to calculate a compensation amount for the reference signal received power (RSRP) or the reference signal received quality (RSRQ) of the first cell and to compensate the RSRP or RSRQ reported by a UE in the first cell based on the compensation amount for the RSRP or the RSRQ.

[0107] Optionally, the reduction module 502 is further configured to reduce the minimum access level threshold of the first cell based on the compensation amount for the RSRP or the RSRQ.

[0108] In this embodiment, the units in the communication device perform the operations of the communication device in the embodiments shown in FIGS. 2 and 3. Details are not described again here.

[0109] Figure 6 is a possible diagram of the structure of a communication device according to an embodiment of the present application. The communication device includes a processor 601, a communication interface 602, a memory 603, and a bus 604. The processor 601, the communication interface 602, and the memory 603 are interconnected via the bus 604. In an embodiment of the present application, the processor 601 is configured to control and manage the operation of the communication device. For example, the processor 601 is configured to execute the steps in the method embodiments of FIGS. 2 and 3. The communication interface 602 is configured to support the communication of the communication device. The memory 603 is configured to store the program code and data of the communication device.

[0110] The processor 601 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processor may implement or execute various exemplary logical blocks, modules, and circuits described with reference to the content disclosed in the present application. Alternatively, the processor may be a combination of processors that implement arithmetic functions, for example, a combination of one or more microprocessors, or a combination of a digital signal processor and a microprocessor. The bus 604 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus. The bus may include an address bus, a data bus, a control bus, etc. For ease of representation, in FIG. 6 the bus is shown as only one thick line. However, this does not mean that there is only one bus or only one type of bus.

[0111] One embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium contains instructions. When the instructions are launched on a computer, the computer is enabled to execute the method according to the embodiments shown in FIGS. 2 and 3.

[0112] One embodiment of the present application further provides a computer program product containing instructions. When the computer program product is launched on a computer, the computer is enabled to execute the method of the embodiments shown in FIGS. 2 and 3.

[0113] One embodiment of the present application further provides a chip system. The chip system includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a line. The at least one processor is configured to launch a computer program or instructions to execute the method in the embodiments shown in FIGS. 2 and 3.

[0114] For the sake of brief and concise description, for the detailed operation processes of the aforementioned systems, devices, and units, those skilled in the art can clearly understand that reference may be made to the corresponding processes in the embodiments of the aforementioned method, and the details will not be described again in this specification.

[0115] In some embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the above-described embodiments of the devices are merely examples. For example, the unit division is only a logical function division, and in actual implementation, it may be divided in other ways. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the mutual connection, direct connection, or communication connection shown or described may be realized through some interfaces. The indirect connection or communication connection between devices or units may be realized in electrical form, mechanical form, or other forms.

[0116] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units. They may be located in one place or distributed over multiple network units. To achieve the purpose of the solution of the embodiment, part or all of the units may be selected based on actual requirements.

[0117] In addition, the functional units in the embodiments of this application may be integrated into one processing unit, or each of the units may physically exist alone, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0118] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, essentially the technical solution of this application, or the part contributing to the prior art, or all or part of the technical solution may be implemented in the form of a software product. The computer software product includes several instructions stored in a storage medium and used to instruct a computer device (which may be a personal computer, a server, a network device, etc.) to execute all or part of the steps of the method described in the embodiments of this application. The aforementioned storage medium includes any medium capable of storing program codes, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

Description of Reference Signs

[0119] 101 Network device 102 Terminal device 103 Terminal device 104 Terminal device 105 Cell 106 Cell 401 Decision module 402 Reduction module 403 Increase module 501 Decision module 502 Reduction module 503 Increase module 504 Transmission module 505 Calculation module 601 Processor 602 Communication interface 603 Memory 604 Bus

Claims

1. A method for energy conservation, comprising: determining, by a network device, a target symbol in a multimedia broadcast multicast service single frequency network (MBSFN) subframe of a first cell, wherein the target symbol is a cell-specific reference signal (CRS) symbol, a demodulation reference signal (DMRS) symbol, a physical downlink control channel (PDCCH) symbol dedicated to a user equipment (UE), and a physical downlink shared channel (PDSCH) symbol dedicated to the UE; when the load of the first cell is lower than a preset threshold, reducing, by the network device, the transmission power of the target symbol; when the load of the first cell is higher than the preset threshold, increasing, by the network device, the transmission power of the target symbol. A method comprising the above steps.

2. The method according to claim 1, wherein the MBSFN subframe does not carry a system information block (SIB) message, a paging message, a message 2 (MSG2), or a message 4 (MSG4) of the first cell.

3. The method according to claim 1 or 2, wherein the target symbol does not include symbols in a physical control format indicator channel (PCFICH) and a physical hybrid automatic repeat request indicator channel (PHICH), or common PDCCH symbols and a channel state reference signal (CSIRS) symbol of the first cell.

4. The method according to any one of claims 1 to 3, wherein the PDSCH symbol does not include a voice over long term evolution (VoLTE) symbol, a signaling radio bearer 1 (SRB1) symbol, or a signaling radio bearer 2 (SRB2) symbol.

5. The method according to any one of claims 1 to 4, wherein the CRS symbol is located outside the position of symbol 0 of the MBSFN subframe.

6. The method further comprises: A step of transmitting a target message to a second cell by the network device, wherein the target message indicates that an evolved multimedia broadcast multicast service eMBMS cell exists in a neighboring cell having a handover relationship with the second cell, and the neighboring cell includes the first cell, the method according to any one of claims 1 to 5, further comprising the step.

7. Before the step of reducing the transmission power of the target symbol by the network device, the method is A step of determining by the network device that the intensity of a signal received by a UE in the first cell is higher than a target threshold of the first cell, wherein the target threshold is higher than a minimum access level threshold of the first cell, the method according to any one of claims 1 to 6, further comprising the step.

8. After the step of reducing the transmission power of the target symbol by the network device, the method is A step of calculating, by the network device, a compensation amount for a reference signal received power RSRP or a reference signal received quality RSRQ of the first cell; and A step of compensating, by the network device, the RSRP or the RSRQ reported by the UE in the first cell based on the compensation amount of the RSRP or the compensation amount of the RSRQ The method according to any one of claims 1 to 7, further comprising.

9. The method is The method according to claim 8, further comprising a step of reducing, by the network device, a minimum access level threshold of the first cell based on the compensation amount of the RSRP or the compensation amount of the RSRQ.

10. A communication device, A determination module configured to determine a target symbol in a multimedia broadcast multicast service single frequency network MBSFN subframe of a first cell, wherein the target symbols are cell-specific reference signal CRS symbols, demodulation reference signals DMRS symbols, physical downlink control channel PDCCH symbols dedicated to a terminal device UE, and physical downlink shared channel PDSCH symbols dedicated to the UE, the determination module; A reduction module configured to reduce the transmission power of the target symbol when the load of the first cell is lower than a preset threshold value; An increase module configured to increase the transmission power of the target symbol when the load of the first cell is higher than the preset threshold value; The apparatus comprising the same.

11. The apparatus according to claim 10, wherein the MBSFN subframe does not carry the system information block SIB message, paging Paging message, message 2 MSG2, or message 4 MSG4 of the first cell.

12. The apparatus according to claim 10 or 11, wherein the target symbol does not include symbols in the physical control format indicator channel PCFICH and the physical hybrid automatic repeat request indicator channel PHICH, or the common PDCCH symbol and the channel state reference signal CSIRS symbol of the first cell.

13. The apparatus according to any one of claims 10 to 12, wherein the PDSCH symbol does not include a voice over long term evolution VoLTE symbol, a signaling radio bearer 1 SRB1 symbol, or a signaling radio bearer 2 SRB2 symbol.

14. The apparatus according to any one of claims 10 to 13, wherein the CRS symbol is located outside the position of symbol 0 of the MBSFN subframe.

15. The apparatus according to any one of claims 10 to 14, further comprising a transmission module configured to transmit a target message to a second cell, wherein the target message indicates that an evolved multimedia broadcast multicast service eMBMS cell exists in a neighboring cell having a handover relationship with the second cell, and the neighboring cell includes the first cell.

16. The apparatus according to any one of claims 10 to 15, wherein the determination module is further configured to determine that the intensity of a signal received by a UE in the first cell is higher than a target threshold value of the first cell, and the target threshold value is higher than a minimum access level threshold value of the first cell.

17. The apparatus further comprises a calculation module configured to calculate a compensation amount for a reference signal received power (RSRP) or a compensation amount for a reference signal received quality (RSRQ) of the first cell, and to compensate the RSRP or the RSRQ reported by the UE in the first cell based on the compensation amount for the RSRP or the compensation amount for the RSRQ. The apparatus according to any one of claims 10 to 16.

18. The apparatus according to claim 17, wherein the reduction module is further configured to reduce a minimum access level threshold of the first cell based on the compensation amount for the RSRP or the compensation amount for the RSRQ.

19. A communication apparatus, A communication apparatus comprising at least one processor and an interface circuit, The interface circuit is configured to provide a program or instructions to the at least one processor, The at least one processor is configured to execute the program or the instructions to enable the communication apparatus to execute the method according to any one of claims 1 to 9. A communication apparatus.

20. A computer-readable storage medium storing instructions which, when executed by a computer, cause the method according to any one of claims 1 to 9 to be executed. A computer-readable storage medium.

21. A computer program product comprising instructions which, when launched on a computer, enable the computer to execute the method according to any one of claims 1 to 9. A computer program product.

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