Method and apparatus for triggering power headroom reporting, and user equipment

Abstract

Embodiments of the present application relate to the technical field of communications, and provide a method and an apparatus for triggering power headroom reporting, and a user equipment. The method comprises: a user equipment receives at least one first path loss offset value and at least one second path loss offset value, the at least one first path loss offset value and the at least one second path loss offset value being from a network device; and, on the basis of the at least one first path loss offset value and the at least one second path loss offset value, the user equipment performs power headroom reporting. In the present application, the user equipment acquires the at least one first path loss offset value and the at least one second path loss offset value sent by the network device, and, on the basis of an amount of change between the two path loss offset values, determines whether to perform the power headroom reporting, so that the problem of existing trigger mechanisms being unsuitable due to inconsistency between an actual uplink path loss and a measured downlink path loss in a UL only TRP scenario is solved.

Description

Method, device and terminal equipment for triggering power headroom reporting

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on December 28, 2023, with application number 202311861738.2 and application name “Method, device and terminal equipment for triggering power margin reporting”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a method, apparatus and terminal device for triggering power headroom reporting. Background Art

[0003] Since the transmit power of the terminal equipment (UE) cannot exceed the maximum output power in the long term evolution (LTE) and new radio (NR) systems, the UE usually notifies the network device of the difference between the UE maximum output power and the current physical uplink shared channel (PUSCH) or sounding reference signal (SRS) transmit power through power headroom reporting (PHR). The network device performs uplink scheduling and link adaptation based on this difference, and further decides whether to perform power control, for example, reducing or increasing the transmit power, so that the UE's current transmit power is within an appropriate range.

[0004] Currently, the conditions that trigger a UE to perform a PHR mainly include: the expiration of the prohibit timer (phr-Prohibit Timer), the change in path loss since the last PHR being greater than a preset threshold, the expiration of the periodic timer (phr-Periodic Timer), a change in PHR configuration, the activation of a secondary cell (Scell), the activation of a secondary cell group (SCG), the addition of a primary secondary cell (PSCell), or a power backoff caused by power control being greater than a preset threshold. In the case where the prohibit timer status and the change in path loss since the last PHR are used to determine whether to trigger a power headroom report, in traditional base stations, the UE's uplink and downlink path losses are equivalent. Therefore, the UE can obtain the uplink path loss by measuring the downlink reference signal and then determine whether to perform a power headroom report based on whether the prohibit timer has expired. To improve the uplink throughput of the network, a base station dedicated only to uplink reception (Uplink Only TRP) is set up. Although this improves the uplink throughput, it causes the downlink path loss and uplink path loss measured by the UE to be unequal, making it impossible to trigger the reporting of power headroom by measuring the downlink path loss. Summary of the Invention

[0005] The present application provides a method, apparatus, and terminal device for triggering power headroom reporting. The terminal device determines whether to perform power headroom reporting based on the measured downlink path loss and the path loss offset value notified by the network device.

[0006] The technical solution is as follows:

[0007] In a first aspect, an embodiment of the present application provides a method for triggering power headroom reporting, comprising: receiving, by a terminal device, at least one first path loss offset value and at least one second path loss offset value. The at least one first path loss offset value and the at least one second path loss offset value are from a network device. The terminal device reports power headroom based on the at least one first path loss offset value and the at least one second path loss offset value.

[0008] In this application, the terminal device obtains at least one first path loss bias value and at least one second path loss bias value sent by the network device, and reports the power margin by comparing the two path loss bias values, so as to realize power margin reporting in the UL only TRP scenario.

[0009] In one possible implementation, when a terminal device receives a first path loss bias value and then receives a second path loss bias value, power headroom reporting is performed based on at least one first path loss bias value and at least one second path loss bias value. The method provided in an embodiment of the present application includes: when the change between the first path loss bias value and the second path loss bias value is greater than or equal to a first preset threshold, the terminal device reports the power headroom.

[0010] In one possible implementation, the method provided in an embodiment of the present application further includes: when a change between a first path loss offset value and a second path loss offset value of the terminal device is greater than or equal to a first preset threshold value, and the first path loss offset value has been used for power headroom reporting, performing power headroom reporting. The first path loss offset value having been used for power headroom reporting may mean having been used for the most recent power headroom report or the previous power headroom report, which is not limited in the embodiment of the present application.

[0011] In one possible implementation, when a terminal device receives at least one second path loss offset value after receiving a first path loss offset value, power headroom reporting is performed based on the at least one first path loss offset value and the at least one second path loss offset value. The method provided in an embodiment of the present application includes: the terminal device determining a third path loss offset value based on the first path loss offset value and the at least one second path loss offset value. The terminal device reports power headroom when a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

[0012] In one possible implementation, the method provided in an embodiment of the present application further includes: when a change between the first path loss offset value and the third path loss offset value of the terminal device is greater than or equal to a first preset threshold value, and the first path loss offset value has been used for power headroom reporting, performing power headroom reporting. The fact that the first path loss offset value has been used for power headroom reporting may mean that the first path loss offset value has been used for the most recent power headroom reporting, or has been used for the previous power headroom reporting, which is not limited in the embodiment of the present application.

[0013] In one possible implementation, when a terminal device receives multiple first path loss offset values ​​and then multiple second path loss offset values, power headroom reporting is performed based on at least one first path loss offset value and at least one second path loss offset value. The method provided in an embodiment of the present application includes: the terminal device determining a fourth path loss offset value based on the multiple first path loss offset values. The terminal device determining a fifth path loss offset value based on the multiple second path loss offset values. The terminal device reporting power headroom when a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold.

[0014] In one possible implementation, the method provided in an embodiment of the present application further includes: when a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a first preset threshold value, and the first path loss offset value has already been used for power headroom reporting, the terminal device performs power headroom reporting. The first path loss offset value having been used for power headroom reporting may mean that it has been used for the most recent power headroom reporting or the previous power headroom reporting, which is not limited in the embodiment of the present application.

[0015] In one possible implementation, the method provided in an embodiment of the present application includes: the terminal device reports the power headroom based on at least one first path loss offset value and at least one second path loss offset value, and a status of a counter.

[0016] In one possible implementation, the method provided in an embodiment of the present application includes: when a change between a first path loss offset value and a second path loss offset value of a terminal device is greater than or equal to a first preset threshold, or a change between a first path loss offset value and a third path loss offset value is greater than or equal to a second preset threshold, or a change between a fourth path loss offset value and a fifth path loss offset value is greater than or equal to a third preset threshold, and when a timer is in a timeout state, reporting power headroom. This allows the terminal device to trigger power headroom reporting based on the path loss offset value and the timer status.

[0017] In one possible implementation, the method provided in an embodiment of the present application also includes: when the change between the first path loss bias value and the second path loss bias value of the terminal device is greater than or equal to a first preset threshold, the timer is in a timeout state, and the first path loss bias value has been used for power margin reporting, the power margin reporting is performed.

[0018] In one possible implementation, the method provided in an embodiment of the present application also includes: when the change between the first path loss bias value and the third path loss bias value of the terminal device is greater than or equal to a first preset threshold, the timer is in a timeout state, and the first path loss bias value has been used for power headroom reporting, the power headroom reporting is performed.

[0019] In one possible implementation, the method provided in an embodiment of the present application also includes: when the change between the fourth path loss bias value and the fifth path loss bias value of the terminal device is greater than or equal to the first preset threshold, the timer is in a timeout state, and the first path loss bias value has been used for power headroom reporting, the power headroom reporting is performed.

[0020] The case where the first path loss offset value has been used for power headroom reporting may be that the first path loss offset value has been used for the most recent power headroom reporting, or has been used for the last power headroom reporting, which is not limited in the embodiment of the present application.

[0021] Among them, the timer being in the timeout state can be understood as the timer timing out or has timed out, or the timer expires, which is not limited in the embodiments of the present application.

[0022] In one possible implementation, a terminal device reports power headroom based on at least one first path loss offset value and at least one second path loss offset value. The method provided in an embodiment of the present application includes: the terminal device determines a first uplink path loss and a second uplink path loss. The first uplink path loss is determined by the first downlink path loss and at least one first path loss offset value, and the second uplink path loss is determined by the second downlink path loss and at least one second path loss offset value, or by at least one first path loss offset value, the second downlink path loss, and at least one second path loss offset value. The terminal device reports power headroom based on the first uplink path loss and the second uplink path loss.

[0023] In the present application, a terminal device obtains at least one first path loss offset value and at least one second path loss offset value sent by a network device, and directly reports power headroom based on the magnitude of the difference between the at least one first path loss offset value and the at least one second path loss offset value. When the difference is greater than or equal to a preset threshold, the terminal device triggers power headroom reporting.

[0024] In one possible implementation, the terminal device reports the power headroom based on the first uplink path loss and the second uplink path loss, including: the terminal device reports the power headroom when the change between the first uplink path loss and the second uplink path loss is greater than or equal to a fourth preset threshold.

[0025] In one possible implementation, the method provided in an embodiment of the present application further includes: when the change between the first uplink path loss and the second uplink path loss of the terminal device is greater than or equal to a fourth preset threshold, and the first uplink path loss has been used for power headroom reporting, performing power headroom reporting. The fact that the first uplink path loss has been used for power headroom reporting may mean that the first uplink path loss has been used for the most recent power headroom reporting, or the last power headroom reporting, which is not limited in the embodiment of the present application.

[0026] In a possible implementation, at least one first path loss offset value is received in a first time period, and at least one second path loss offset value is received in a second time period, where the first time period is before the second time period.

[0027] In a possible implementation, the first downlink path loss is obtained at the last time before the first time period or within a first preset time period, or the first downlink path loss is obtained at the most recent time after the first time period or within a second preset time period.

[0028] In a possible implementation, the second downlink path loss is obtained at the last time before the second time period or within the first preset time period, or the second downlink path loss is obtained at the most recent time after the second time period or within the second preset time period.

[0029] In one possible implementation, when the terminal device does not receive at least one second path loss offset value from the network device after receiving at least one first path loss offset value, the second uplink path loss is determined by the first downlink path loss and the at least one first path loss offset value.

[0030] As an example, after receiving at least one first path loss offset value from a network device, a terminal device may not receive at least one second path loss offset value. For example, at a first moment, the network device sends at least one first path loss offset value to the terminal device, and accordingly, the terminal device receives at least one first path loss offset value from the network device at the first moment; at a second moment, the network device fails to promptly send at least one second path loss offset value to the terminal device, and accordingly, the terminal device does not receive the at least one second path loss offset value at the second moment.

[0031] In a possible implementation, the terminal device does not report the power headroom if it does not receive at least one second path loss offset value from the network device after receiving at least one first path loss offset value.

[0032] In a possible implementation, the method provided in an embodiment of the present application further includes: the terminal device reports the power headroom based on the change between the first uplink path loss and the second uplink path loss, and the status of the timer.

[0033] In one possible implementation, the method provided in an embodiment of the present application includes: when the change between the first uplink path loss and the second uplink path loss of the terminal device is greater than or equal to a fourth preset threshold and the timer is in a timeout state, reporting the power headroom.

[0034] In one possible implementation, the method provided in an embodiment of the present application further includes: when the change between the first uplink path loss and the second uplink path loss of the terminal device is greater than or equal to a fourth preset threshold, the timer is in a timeout state, and the first uplink path loss has been used for power headroom reporting, performing power headroom reporting. The situation where the first uplink path loss has been used for power headroom reporting may mean that the first uplink path loss has been used for the most recent power headroom reporting, or has been used for the previous power headroom reporting, which is not limited in the embodiments of the present application.

[0035] In one possible implementation, when the terminal device does not receive at least one second path loss bias value from the network device after receiving at least one first path loss bias value, the method provided in an embodiment of the present application includes: the terminal device reports the power headroom based on the change between the first downlink path loss and the second downlink path loss and the status of the timer.

[0036] As an example, at a first moment, a terminal device receives at least one first path loss offset value from a network device and measures a first downlink path loss. At a second moment, the terminal device measures a second downlink path loss but does not receive at least one second path loss offset value from the network device. The terminal device then determines whether to report the power headroom based on the first downlink path loss, the second downlink path loss, and the state of the timer.

[0037] In one possible implementation, the method provided in an embodiment of the present application includes: the terminal device reports the power headroom when the change between the first downlink path loss and the second downlink path loss is greater than or equal to a fifth preset threshold and the timer is in a timeout state.

[0038] In one possible implementation, the method provided in an embodiment of the present application further includes: when the terminal device has a change between the first downlink path loss and the second downlink path loss greater than or equal to a fifth preset threshold, the timer is in a timeout state, and the first downlink path loss has been used for power headroom reporting, performing power headroom reporting. The fact that the first downlink path loss has been used for power headroom reporting may mean that the first downlink path loss has been used for the most recent power headroom report or the previous power headroom report, which is not limited in the embodiments of the present application.

[0039] In a possible implementation, the first path loss offset value is a difference or offset coefficient between the first downlink path loss and the first uplink path loss, and the second path loss offset value is a difference or offset coefficient between the second downlink path loss and the second uplink path loss.

[0040] In a second aspect, an embodiment of the present application provides a method for triggering power headroom reporting, comprising: a network device sends at least one first path loss bias value and at least one second path loss bias value to a terminal device, wherein the at least one first path loss bias value and the at least one second path loss bias value are used to trigger power headroom reporting.

[0041] In one possible implementation, the method provided in an embodiment of the present application includes: a network device sends a first path loss bias value to a terminal device and then sends a second path loss bias value, and triggers power headroom reporting when a change between the first path loss bias value and the second path loss bias value is greater than or equal to a first preset threshold.

[0042] In one possible implementation, an embodiment of the present application includes: a network device sending a first path loss offset value to a terminal device and then receiving at least one second path loss offset value, wherein the first path loss offset value and the at least one second path loss offset value are used to determine a third path loss offset value. The network device triggers power headroom reporting when a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

[0043] In one possible implementation, an embodiment of the present application includes: a network device sending at least one first path loss offset value to a terminal device and then sending at least one second path loss offset value, wherein the at least one first path loss offset value is used to determine a fourth path loss offset value, and the at least one second path loss offset value is used to determine a fifth path loss offset value. The network device triggers power headroom reporting when a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold.

[0044] In a third aspect, embodiments of the present application provide an apparatus for triggering power headroom reporting, comprising: a receiving unit and a reporting unit. The receiving unit is configured to receive at least one first path loss offset value and at least one second path loss offset value, the at least one first path loss offset value and the at least one second path loss offset value being from a network device. The reporting unit is configured to report the power headroom based on the at least one first path loss offset value and the at least one second path loss offset value.

[0045] In one possible implementation, when a second path loss offset value is received after a first path loss offset value is received, the reporting unit is configured to report the power headroom when a change between the first path loss offset value and the second path loss offset value is greater than or equal to a first preset threshold.

[0046] In one possible implementation, when at least one second path loss offset value is received after a first path loss offset value is received, the reporting unit is configured to determine a third path loss offset value based on the first path loss offset value and the at least one second path loss offset value. The reporting unit is further configured to report the power headroom when a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

[0047] In one possible implementation, when multiple second path loss offset values ​​are received after multiple first path loss offset values ​​are received, the reporting unit is configured to determine a fourth path loss offset value based on the multiple first path loss offset values, and to determine a fifth path loss offset value based on the multiple second path loss offset values. The reporting unit is further configured to report the power headroom when a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold.

[0048] In a possible implementation, the reporting unit is configured to report the power headroom based on at least one first path loss offset value, at least one second path loss offset value, and a status of a counter.

[0049] In one possible implementation, the reporting unit is used to report the power headroom when the change between the first path loss bias value and the second path loss bias value is greater than or equal to the first preset threshold, or the change between the first path loss bias value and the third path loss bias value is greater than or equal to the second preset threshold, or the change between the fourth path loss bias value and the fifth path loss bias value is greater than or equal to the third preset threshold, and the timer is in a timeout state.

[0050] In one possible implementation, the reporting unit is further configured to determine a first uplink path loss and a second uplink path loss. The first uplink path loss is determined by the first downlink path loss and the first path loss offset value, and the second uplink path loss is determined by the second downlink path loss and the second path loss offset value, or by the first path loss offset value, the second downlink path loss, and the second path loss offset value. The reporting unit is further configured to report the power headroom based on the first uplink path loss and the second uplink path loss.

[0051] In a possible implementation, the reporting unit is configured to report the power headroom when a change between the first uplink path loss and the second uplink path loss is greater than a fourth preset threshold.

[0052] In a possible implementation, the first path loss offset value is received in a first time period, and the second path loss offset value is received in a second time period, and the first time period is before the second time period.

[0053] In a possible implementation, when the reporting unit does not receive the second path loss offset value from the network device after receiving the first path loss offset value, the reporting unit does not report the power headroom.

[0054] In a possible implementation, the reporting unit is further configured to report the power headroom according to a change between the first uplink path loss and the second uplink path loss, and a state of a timer.

[0055] In a possible implementation, the reporting unit is configured to report the power headroom when a change between the first uplink path loss and the second uplink path loss is greater than a first preset threshold and the timer is in a timeout state.

[0056] In one possible implementation, when at least one second path loss offset value is not received from the network device after receiving at least one first path loss offset value, the reporting unit is used to report the power headroom based on the change between the first downlink path loss and the second downlink path loss and the status of the timer.

[0057] In a possible implementation, the reporting unit is configured to report the power headroom when a change between the first downlink path loss and the second downlink path loss is greater than a second preset threshold and the timer is in a timeout state.

[0058] In a fourth aspect, an embodiment of the present application provides an apparatus for triggering power headroom reporting, comprising: a sending unit, configured to send at least one first path loss offset value and at least one second path loss offset value.

[0059] In a possible implementation, the sending unit sends a first path loss offset value and then sends a second path loss offset value. When a change between the first path loss offset value and the second path loss offset value is greater than or equal to a first preset threshold, power headroom reporting is triggered.

[0060] In one possible implementation, a transmitting unit sends a first path loss offset value and then receives at least one second path loss offset value. The first path loss offset value and the at least one second path loss offset value are used to determine a third path loss offset value. If a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold, power headroom reporting is triggered.

[0061] In one possible implementation, the sending unit sends at least one first path loss offset value and then at least one second path loss offset value. The at least one first path loss offset value is used to determine a fourth path loss offset value, and the at least one second path loss offset value is used to determine a fifth path loss offset value. If a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold, power headroom reporting is triggered.

[0062] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a memory and a processor, the memory being used to store instructions, the processor being used to execute the instructions stored in the memory, and the execution of the instructions stored in the memory enabling the processor to execute the method for triggering power headroom reporting described in the first aspect or various possible implementations of the first aspect, or to execute the method for triggering power headroom reporting described in the first aspect or various possible implementations of the first aspect.

[0063] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is run on a computer, the computer executes the method for triggering power headroom reporting as described in the first aspect or various possible implementations of the first aspect, or executes the method for triggering power headroom reporting as described in the first aspect or various possible implementations of the first aspect.

[0064] In the seventh aspect, an embodiment of the present application provides a computer program product comprising instructions. When the instructions are executed on a computer, the computer implements the method for triggering power headroom reporting described in the first aspect or various possible implementations of the first aspect, or executes the method for triggering power headroom reporting described in the first aspect or various possible implementations of the first aspect.

[0065] In an eighth aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run a computer program or instruction to implement the method for triggering power headroom reporting described in the first aspect or various possible implementations of the first aspect, or execute the method for triggering power headroom reporting described in the first aspect or various possible implementations of the first aspect. The communication interface is used to communicate with other modules outside the chip.

[0066] Specifically, the chip provided in the embodiment of the present application also includes a memory for storing computer programs or instructions.

[0067] Any of the devices, computer storage media, computer program products, chips, or communication systems provided above are used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding schemes in the corresponding methods provided above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0069] FIG2 is a schematic diagram of a method for triggering power headroom reporting provided in an embodiment of the present application;

[0070] FIG3 is a schematic diagram of a method for triggering power headroom reporting provided in an embodiment of the present application;

[0071] FIG4 is a schematic diagram of another method for triggering power headroom reporting provided in an embodiment of the present application;

[0072] FIG5 is a schematic diagram of the structure of a device for triggering power headroom reporting provided in an embodiment of the present application;

[0073] FIG6 is a schematic diagram of the hardware structure of a communication device provided in an embodiment of the present application;

[0074] FIG7 is a schematic block diagram of a terminal device according to an embodiment of the present application;

[0075] FIG8 is a schematic block diagram of a network device according to an embodiment of the present application;

[0076] FIG9 is a schematic diagram of a chip structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. For example, the first symbol and the second symbol are merely used to distinguish different symbols and do not limit their order. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences.

[0078] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0079] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0080] The technical terms involved in the embodiments of this application are explained.

[0081] 1. Power headroom refers to the remaining power after a terminal device completes its current transmission. The network device can configure a maximum allowable transmit power for the terminal device. The power headroom can be understood as the remaining power after subtracting the actual transmit power from the maximum allowable transmit power, or the remaining power after subtracting the reference transmit power from the maximum allowable transmit power. For example, if the transmit power of a terminal device sending a physical uplink shared channel (PUSCH) or a sounding reference signal (SRS) is P1, and the network device configures the maximum allowable transmit power for the terminal device as P0, the power headroom can be understood as P0-P1.

[0082] 2. Maximum transmit power: This indicates the upper limit of the transmit power a terminal device can use within the frequency band. The maximum transmit power of a terminal device is determined by its capabilities and the frequency band.

[0083] 3. Path loss refers to the loss of signals when they propagate through space.

[0084] FIG1 is a schematic diagram of the architecture of a communication system used in an embodiment of the present application. As shown in FIG1 , the communication system includes a wireless access network 100 and a core network 200. The wireless access network 100 may include at least one network device (such as 110a and / or 110b in FIG1 ) and may also include at least one terminal device (such as at least one of 120a-120c in FIG1 ). The terminal device is connected to the network device wirelessly, and the network device is connected to the core network wirelessly or by wire. Terminal devices and network devices may be connected to each other by wire or by wireless. FIG1 is merely a schematic diagram, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices.

[0085] A network device is a network-side device with wireless transceiver capabilities. A network device can be a device in a radio access network (RAN) that provides wireless communication capabilities for terminal devices, and is called a RAN device. For example, a network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a fifth-generation (5G) mobile communication system, a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. It can also be a module or unit that performs some of the functions of a base station, such as a centralized unit (CU) or a distributed unit (DU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete the functions of part of the physical layer or all of the physical layer. For the specific description of the above-mentioned various protocol layers, please refer to the relevant technical specifications of the 3rd Generation Partnership Project (3GPP). The network device can be a macro base station (or a micro base station or an indoor station, or a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0086] A terminal device is a user-side device with wireless transceiver capabilities. A terminal device may also be referred to as user equipment (UE), a mobile station, a mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. The terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

[0087] Network devices and terminal devices can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; and in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of network devices and terminal devices.

[0088] The roles of network devices and terminal devices can be relative. For example, terminal device 120a in Figure 1 can be configured as a mobile network device. For terminal devices that access the wireless access network 100 through terminal device 120a, the terminal device is a network device. However, for network device 110a in Figure 1, terminal device 120a is a terminal device, that is, communication between network device 110a and terminal device 120a occurs via a wireless air interface protocol. Of course, network device 110a and terminal device 120a can also communicate via an interface protocol between network devices. In this case, relative to network device 110a, terminal device 120a is also a network device. Therefore, network devices and terminal devices can be collectively referred to as communication devices. Network devices 110a and 110b in Figure 1 can be referred to as communication devices with network device functions, and devices 120a-120c in Figure 1 can be referred to as communication devices with terminal device functions.

[0089] Network devices and terminal devices, network devices and network devices, and terminal devices and terminal devices can communicate through authorized spectrum, unauthorized spectrum, or both; can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz simultaneously. The embodiments of the present application do not limit the spectrum resources used for wireless communications.

[0090] In the embodiments of the present application, the functions of the network device may also be performed by a module (such as a chip) in the network device, or by a control subsystem that includes the network device functions. The control subsystem that includes the network device functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal device may also be performed by a module (such as a chip or a modem) in the terminal device, or by a device that includes the terminal device functions.

[0091] Currently, when a terminal device meets the trigger conditions for power headroom reporting (PHR), it can report the difference between the maximum allowed transmit power and the actual transmit power to the network device. The following uses the PHR mechanism for the physical uplink shared channel (PUSCH) as an example to illustrate.

[0092] If a terminal device transmits uplink data PUSCH on the uplink bandwidth part (BWP) b of carrier f in cell c using parameter set configuration indexed j and PUSCH power control adjustment state indexed l, the PUSCH transmit power at transmission opportunity i is:

[0093] Among them, the transmission power P PUSCH,b,f,c (i,j,q d ,l) is in decibels (dBm).

[0094] Among them, P CMAX,f,c (i) is the maximum transmit power configured for the terminal device, P O_PUSCH,b,f,c (j) is the expected received power configured by the network device for the terminal device, μ is the subcarrier spacing, is the bandwidth of PUSCH, α b,f,c (j) is the path loss factor, PL b,f,c (q d) is the downlink reference signal q measured by the terminal device d Path loss, Δ TF,b,f,c (i) is the offset related to the modulation and coding scheme (MCS), f b,f,c (i,l) is the closed-loop power control adjustment value.

[0095] When a terminal device determines a Type 1 PHR based on an actual PUSCH transmission on an activated serving cell, then for PUSCH transmission opportunity i on uplink BWPb of cell c carrier f, the terminal device calculates the Type 1 PHR:

[0096] When a terminal device determines a Type 1 PHR based on a reference PUSCH transmission on an activated serving cell, then for PUSCH transmission opportunity i on uplink BWPb of carrier f in cell c, the terminal device calculates the Type 1 PHR:

[0097] If a terminal device transmits uplink data SRS using a sounding reference signal (SRS) with an index of 1 in the power control adjustment state on the uplink BWPb of carrier f in cell c, the transmit power of the SRS at transmission opportunity i is:

[0098] Among them, P CMAX,f,c (i) is the maximum transmit power configured for the UE, P O_SRS,b,f,c (q s ) is the expected receiving power configured by the network device for the terminal device, μ is the subcarrier spacing, is the bandwidth of SRS, α SRS,b,f,c (q s ) is the path loss factor, PL b,f,c (q s ) is the downlink reference signal q measured by the terminal device s Path loss, in dB, h b,f,c (i,l) is the closed-loop power control adjustment value.

[0099] When the terminal device determines a Type 3 PHR based on an actual SRS transmission on an activated serving cell, then for SRS transmission opportunity i on uplink BWPb of cell c carrier f, the terminal device calculates Type 3 PHR: PH type3,b,f,c (i,q s )=P CMAX,f,c (i)-{P O_SRS,b,f,c (q s )+10log10 (2 μ ·M SRS,b,f,c (i))+α SRS,b,f,c (q s )·PL b,f,c (q d )+h b,f,c (i)}

[0100] When a terminal device determines a Type 3 PHR based on a reference SRS transmission on an activated serving cell, then for SRS transmission opportunity i on uplink BWPb of carrier f in cell c, the terminal device calculates the Type 3 PHR:

[0101] In the prior art, before a terminal device performs a PHR, certain conditions must be met before the PHR is triggered.

[0102] As an example, when a medium access control (MAC) entity has uplink resources for a new transmission and the timer (phr-Prohibit Timer) expires or has expired, if the path loss of at least one activated cell in any MAC entity changes by more than a threshold (phr-Tx-Power Factor Change) compared to the path loss of the cell at the time of the last PHR transmission in this MAC, a PHR is performed. The threshold (phr-Tx-Power Factor Change) parameter is used as a path loss reference.

[0103] Alternatively, if the timer (phr-Periodic Timer) times out, a PHR is performed.

[0104] Alternatively, if the upper layer has configured or reconfigured the PHR function and has not disabled the PHR function, PHR is performed.

[0105] Alternatively, if activation of a secondary cell (SCell) or activation of a secondary cell group (SCG) for uplink is configured in any MAC entity, PHR is performed.

[0106] Alternatively, a new primary secondary cell (PSCell) is added and PHR is performed.

[0107] As another example, when the MAC entity has uplink resources for new transmission and the timer (phr-Prohibit Timer) times out or has timed out, if any service cell configured with uplink is activated on any MAC, and this cell has uplink resources for transmission or has physical uplink control channel (PUCCH) transmission, and the power fallback of this cell due to power management is greater than the power fallback when the MAC entity last transmitted PHR with PUSCH or PUCCH transmission, then PHR is performed.

[0108] Alternatively, when the activated BWP of the SCell of any MAC entity configured with the uplink is switched from a dormant BWP to a non-dormant downlink (DL) BWP, a PHR is performed.

[0109] Alternatively, if mpe-Reporting-FR2 is configured and the mpe-Prohibit Timer is not running, and the maximum power reduction (P-MPR) for meeting the maximum permissible emission (MPE) requirement for FR2 in at least one activated frequency range 2 (FR2) serving cell since the last PHR transmission is equal to or greater than the maximum permissible exposure threshold (mpe-Threshold), then a PHR is performed.

[0110] Alternatively, if the change in the measured P-MPR since the last PHR transmission to meet the FR2 MPE requirement is greater than a threshold (phr-Tx-Power Factor Change), a PHR is performed.

[0111] Currently, uplink power control of terminal devices requires obtaining the path loss between the terminal device and network equipment. For traditional network equipment (such as base stations), the uplink path loss and downlink path loss of terminal devices are equivalent. Therefore, when the terminal device performs a PHR, it can obtain the uplink path loss by measuring the downlink reference signal and combining it with the downlink reference signal transmission power notified by the base station. The terminal device then determines whether to perform a PHR by combining the change between the uplink path loss since the last PHR and the current uplink path loss with a timer (phr-Prohibit Timer) to determine whether to perform a PHR.

[0112] In order to improve the uplink capability of the network, a new type of base station is proposed, called an uplink only transmission-reception point (Uplink only TRP), which can be used as an additional supplement to the traditional base station to achieve the purpose of improving uplink coverage. In a scenario including an Uplink only TRP, the terminal device can send an uplink signal to the Uplink only TRP, and still receive the downlink signal from the traditional base station. For example, referring to the communication system shown in Figure 1, the network device 110a serves as a traditional base station, the network device 110b serves as an Uplink only TRP, and the terminal device 120a sends an uplink signal to the network device 110b and receives a downlink signal from the network device 110a. However, due to the different physical locations of the network device 110a and the network device 110b, the downlink path loss measured by the terminal device 120a and the actual uplink path loss are not equivalent.

[0113] One solution to the problem that the downlink path loss measured by the terminal device is not equivalent to the actual uplink path loss is for the network device to send the uplink path loss and downlink path loss path loss offset values ​​to the terminal device. The terminal device determines the uplink path loss used for uplink power control based on the path loss offset value and the measured downlink path loss. For example, the path loss offset value is recorded as Δ, and the downlink path loss is recorded as PL DL , then the upstream path loss PL UL By Δ and PL DL Determine, can be Δ and PL DL The sum of PL UL =PL DL +Δ, or Δ and PL DL The difference, PL UL =PL DL -Δ; can also be Δ and PL DL The product of PL UL =Δ·PL DL It is understandable that the embodiment of the present application does not limit the specific form of the offset value.

[0114] Because the downlink path loss measured by the terminal device 120a is not equivalent to the actual uplink path loss, it will affect the power headroom reporting. For example, referring to the communication system shown in Figure 1, the threshold (phr-Tx-Power Factor Change) indicated by the network device 110a to the terminal device 120a is 6dB, and the counter (phr-Prohibit Timer) indicated by the network device 110a to the terminal device 120a is sf100. At time t0, the downlink path loss measured by the terminal device 120a is The path loss offset value indicated by the network device 110a to the terminal device 120a Terminal device 120a is based on and A power headroom report is performed; at time t1 (the time difference between time t0 and time t1 is greater than 100 subframes), the terminal device 120a moves away from the network device 110a and moves towards the network device 110b. At this time, the downlink path loss measured by the terminal device 120a is increases to 85dB, while the actual uplink path loss decreases to However, network device 110a does not indicate the new path loss offset value to terminal device 120a. At this point, although the actual uplink path loss change is 10 dB, greater than the 6 dB threshold, and the phr-prohibit timer has expired, the change in downlink path loss between the two measurements by terminal device 120a is only 5 dB, less than the 6 dB threshold. Therefore, the existing method of triggering power headroom reporting based on downlink path loss is not suitable for applications including UL-only TRP.

[0115] In order to solve the above problems, the present application proposes a method, apparatus and terminal device for triggering power headroom reporting. The terminal device can determine whether to report power headroom based on the measured downlink path loss, the path loss offset value notified by the network device and the timer status.

[0116] In an embodiment of the present application, the specific structure of the execution subject of a method for triggering power headroom reporting is not specifically limited in the embodiment of the present application. As long as communication can be performed according to a method for triggering power headroom reporting in an embodiment of the present application by running a program that records the code of the method for triggering power headroom reporting in an embodiment of the present application, for example, the execution subject of a method for triggering power headroom reporting provided in an embodiment of the present application may be a functional module in a terminal device that can call and execute a program, or a communication device applied in a terminal device, such as a chip. The execution subject of a method for triggering power headroom reporting provided in an embodiment of the present application may be a functional module in a network device that can call and execute a program, or a communication device applied in a network device, such as a chip. This application does not limit this.

[0117] A method for triggering power headroom reporting provided in an embodiment of the present application is applied to a communication system including a UL-only TRP. FIG2 is a flow chart of a method for triggering power headroom reporting provided in an embodiment of the present application. The method includes:

[0118] Step S201: A terminal device receives at least one first path loss offset value and at least one second path loss offset value. Accordingly, a network device sends the at least one first path loss offset value and at least one second path loss offset value to the terminal device. The at least one first path loss offset value and the at least one second path loss offset value are from the network device.

[0119] Among them, the network equipment acts as a traditional base station and is only used to send downlink signals to the terminal equipment.

[0120] The path loss offset value is a coefficient of relationship between downlink path loss and uplink path loss. It can be understood that the uplink path loss can be obtained by the path loss offset value and the downlink path loss.

[0121] Specifically, the first path loss offset value is a relationship coefficient between the first downlink path loss and the first uplink path loss, and the second path loss offset value is a relationship coefficient between the second downlink path loss and the second uplink path loss.

[0122] The first path loss offset value and the second path loss offset value are received by the terminal device at two different times or in two different time periods.

[0123] As an example, the terminal device receives a first path loss bias value at a first moment and a second path loss bias value at a second moment; or, the terminal device receives the first path loss bias value at any time within the first time period and receives the second path loss bias value at any time within the second time period.

[0124] Step S202: The terminal device reports the power headroom based on at least one first path loss offset value and at least one second path loss offset value.

[0125] The content in the power headroom report includes the difference between the maximum allowed transmit power and the actual transmit power or the reference transmit power, and the network device performs power control according to the information in the power headroom report.

[0126] The terminal device may directly report the power headroom based on at least one first path loss offset value and at least one second path loss offset value, or may determine the first uplink path loss and the second uplink path loss based on the at least one first path loss offset value and the at least one second path loss offset value, and then report the power headroom based on the first uplink path loss and the second uplink path loss. The two cases are described below respectively:

[0127] Case 1: The terminal device directly reports the power headroom based on at least one first path loss offset value and at least one second path loss offset value.

[0128] In a possible embodiment of the present application, when a terminal device receives a first path loss offset value and then receives a second path loss offset value, the terminal device reports the power headroom based on at least one first path loss offset value and at least one second path loss offset value, including:

[0129] The terminal device reports the power headroom when the change between the first path loss offset value and the second path loss offset value is greater than or equal to the first preset threshold.

[0130] The first preset threshold is determined by the network device.

[0131] As an example, the terminal device receives a first path loss offset value at a first moment Then, at the second moment, a second path loss offset value is received. When the first path loss bias value and the second path loss bias value The change in Δ T When the power headroom is greater than or equal to the first preset threshold, the terminal device reports the power headroom. T The first path loss offset value and the second path loss offset value The absolute value of the difference is taken when compared with the first preset threshold.

[0132] For example, the terminal device receives the first path loss offset value at time t0 Receive the second path loss offset value at time t1 Then the change Δ T =-3dB-(-5dB)=2dB, the change 2dB is compared with the first preset value threshold. Alternatively, the terminal device receives the first path loss offset value at time t0 Receive the second path loss offset value at time t1 Then the change Δ T =-3dB-(-1dB)=-2dB, and the absolute value is taken as 2dB to compare with the first preset value threshold.

[0133] Optionally, the method provided in an embodiment of the present application also includes: when the change between the first path loss bias value and the second path loss bias value of the terminal device is greater than or equal to the first preset threshold, and the first path loss bias value has been used for power headroom reporting, power headroom reporting is performed.

[0134] The first path loss offset value has been used for power headroom reporting, and may have been used for the most recent power headroom reporting, or the previous power headroom reporting, which is not limited in the embodiment of the present application.

[0135] As an example, the terminal device has received the first path loss offset value before the first moment and used it for power headroom reporting, or, has received the first path loss offset value after the first moment and before the second moment and used it for power headroom reporting.

[0136] In a possible embodiment of the present application, when a terminal device receives at least one second path loss offset value after receiving a first path loss offset value, the terminal device reports the power headroom based on the at least one first path loss offset value and the at least one second path loss offset value, including:

[0137] The terminal device determines a third path loss offset value based on the first path loss offset value and at least one second path loss offset value.

[0138] The terminal device reports the power headroom when a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

[0139] The third path loss offset value is obtained by updating the second path loss offset value based on the first path loss offset value. For example, the first path loss offset value indicates a long update period via a radio resource control (RRC) layer, and the second path loss offset value indicates a short update period via downlink control information (DCI).

[0140] As an example, when the terminal device determines the third path loss bias value based on the first path loss bias value and a second path loss bias value, the third path loss bias value is the sum of the first path loss bias value and the second path loss bias value, or the third path loss bias value is the product of the first path loss bias value and the second path loss bias value.

[0141] As another example, when the terminal device determines a third path loss bias value based on the first path loss bias value and multiple second path loss bias values, the third path loss bias value is the sum of the first path loss bias value and the multiple second path loss bias values, or the third path loss bias value is the product of the first path loss bias value and the multiple second path loss bias values.

[0142] The second preset threshold is determined by the network device.

[0143] For example, the terminal device receives the first path loss offset value at the first moment Then, at the second moment, a second path loss offset value is received. Then determine the third path loss bias value or When the first path loss bias value and the third path loss bias value The change in Δ TWhen the power headroom is greater than or equal to the second preset threshold, the terminal device reports the power headroom. T The first path loss offset value and the third path loss offset value The absolute value of the difference is taken when compared with the second preset threshold.

[0144] For example, the terminal device receives the first path loss offset value at the first moment Then, multiple second path loss offset values ​​are received at a second moment, for example, as well as The three second-path loss offset values ​​determine the third-path loss offset value. or When the first path loss bias value and the third path loss bias value The change in Δ T When it is greater than or equal to the second preset threshold, the terminal device reports the power margin.

[0145] Optionally, the method provided in an embodiment of the present application further includes: when a change between the first path loss offset value and the third path loss offset value of the terminal device is greater than or equal to a first preset threshold value, and the first path loss offset value has been used for power headroom reporting, performing power headroom reporting. The situation where the first path loss offset value has been used for power headroom reporting may mean that the first path loss offset value has been used for the most recent power headroom reporting, or has been used for the previous power headroom reporting, which is not limited in the embodiment of the present application.

[0146] In a possible embodiment of the present application, when the terminal device receives at least one first path loss offset value and then receives at least one second path loss offset value, the terminal device reports the power headroom based on the at least one first path loss offset value and the at least one second path loss offset value, including:

[0147] The terminal device determines a fourth path loss offset value based on the multiple first path loss offset values.

[0148] The terminal device determines a fifth path loss offset value based on the multiple second path loss offset values.

[0149] The terminal device reports the power headroom when the change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to the third preset threshold.

[0150] As an example, the fourth path loss offset value used for uplink transmission power control in the first time slot is accumulated from multiple first path loss offset values, and the fifth path loss offset value used for uplink transmission power control in the second time slot is accumulated from multiple second path loss offset values.

[0151] The third preset threshold is determined by the network device.

[0152] For example, the terminal device receives multiple first path loss offset values ​​at a first moment, such as as well as Then, multiple second path loss offset values ​​are received at a second moment, such as as well as Then determine the fourth path loss bias value or Determine the fifth path loss offset value or When the fourth path loss bias value and the fifth path loss bias value The change in Δ T When the power headroom is greater than or equal to the third preset threshold, the terminal device reports the power headroom. T The fourth path loss offset value and the fifth path loss offset value The absolute value of the difference is taken when compared with the third preset threshold.

[0153] Optionally, the method provided in an embodiment of the present application further includes: when the terminal device has a change between the fourth path loss offset value and the fifth path loss offset value greater than or equal to a first preset threshold value, and the first path loss offset value has been used for power headroom reporting, performing power headroom reporting. The fact that the first path loss offset value has been used for power headroom reporting may mean that the first path loss offset value has been used for the most recent power headroom reporting, or the previous power headroom reporting, which is not limited in the embodiment of the present application.

[0154] In a possible embodiment of the present application, the method provided in the embodiment of the present application further includes: the terminal device reports the power headroom based on at least one first path loss offset value and at least one second path loss offset value, and the status of the counter.

[0155] As an example, when a terminal device receives a first path loss bias value and then a second path loss bias value, the terminal device reports the power margin when the change between the first path loss bias value and the second path loss bias value is greater than or equal to a first preset threshold and the counter state is in a timeout state.

[0156] Optionally, the method provided in an embodiment of the present application also includes: when the change between the first path loss bias value and the second path loss bias value of the terminal device is greater than or equal to a first preset threshold, the timer is in a timeout state, and the first path loss bias value has been used for power margin reporting, the power margin reporting is performed.

[0157] As an example, when a terminal device receives a first path loss bias value and then receives multiple second path loss bias values, the terminal device reports the power margin when the change between the first path loss bias value and the third path loss bias value is greater than or equal to the second preset threshold and the counter state is in a timeout state.

[0158] Optionally, the method provided in an embodiment of the present application also includes: when the change between the first path loss bias value and the third path loss bias value of the terminal device is greater than or equal to a first preset threshold, the timer is in a timeout state, and the first path loss bias value has been used for power margin reporting, the power margin reporting is performed.

[0159] As an example, when the terminal device receives multiple first path loss bias values ​​and then multiple second path loss bias values, the terminal device reports the power margin when the change between the fourth path loss bias value and the fifth path loss bias value is greater than or equal to the third preset threshold and the counter state is in a timeout state.

[0160] Optionally, the method provided in an embodiment of the present application also includes: when the change in the terminal device between the fourth path loss bias value and the fifth path loss bias value is greater than or equal to the first preset threshold, the timer is in a timeout state, and the first path loss bias value has been used for power margin reporting, the power margin reporting is performed.

[0161] It is understandable that the case where the first path loss offset value has been used for power headroom reporting may be that the first path loss offset value has been used for the most recent power headroom reporting, or has been used for the last power headroom reporting, which is not limited in the embodiment of the present application.

[0162] It is worth noting that the first preset threshold, the second preset threshold and the third preset threshold may be the same or different, and are not limited in the embodiments of the present application.

[0163] It is worth noting that the timer being in the timeout state can mean that the timer has timed out or has timed out, or the timer has expired, which is not limited in the embodiments of the present application.

[0164] Case 2: The terminal device determines the first uplink path loss and the second uplink path loss according to at least one first path loss offset value and at least one second path loss offset value, and then reports the power margin according to the first uplink path loss and the second uplink path loss.

[0165] In a possible embodiment of the present application, step S202 of the terminal device reporting the power headroom based on at least one first path loss offset value and at least one second path loss offset value includes, as shown in FIG3 :

[0166] Step S2021: The terminal device determines a first uplink path loss and a second uplink path loss.

[0167] The first uplink path loss is determined by the first downlink path loss and at least one first path loss bias value, and the second uplink path loss is determined by the second downlink path loss and at least one second path loss bias value, or by at least one first path loss bias value, the second downlink path loss, and at least one second path loss bias value.

[0168] The first downlink path loss and the second downlink path loss are obtained by measuring the terminal device.

[0169] As an example, at a first moment, the terminal device performs measurement to obtain a first downlink path loss, and at a second moment, the terminal device performs measurement to obtain a second downlink path loss.

[0170] As an example, at a first moment, the first uplink path loss is the sum or product of the first downlink path loss and the first path loss offset value. At a second moment, the second uplink path loss is the sum or product of the second downlink path loss and at least one second path loss offset value, or the second uplink path loss is the sum or product of the second downlink path loss and a third path loss offset value, where the third path loss offset value is the sum or product of the first path loss offset value and at least one second path loss offset value.

[0171] In a possible embodiment of the present application, the first path loss offset value is the difference or offset coefficient between the first downlink path loss and the first uplink path loss, and the second path loss offset value is the difference or offset coefficient between the second downlink path loss and the second uplink path loss.

[0172] As an example, when the path loss offset value is the difference between the downlink path loss and the uplink path loss, the first uplink path loss is equal to the sum of the first downlink path loss and at least one first path loss offset value. Similarly, the second uplink path loss is equal to the sum of the second downlink path loss and at least one second path loss offset value.

[0173] For example, at the first moment t0, the terminal device measures the first downlink path loss Receive the first path loss offset value from the network device The first uplink path loss is determined At the second moment t1, the terminal device measures the second downlink path loss Receive the second path loss offset value from the network device The second uplink path loss is determined

[0174] As another example, when the path loss offset value is an offset coefficient of the downlink path loss and the uplink path loss, the first uplink path loss is equal to the product of the first downlink path loss and at least one first path loss offset value. Similarly, the second uplink path loss is equal to the product of the second downlink path loss and at least one second path loss offset value.

[0175] For example, at the first moment t0, the terminal device measures the first downlink path loss Receive the first path loss offset value from the network device The first uplink path loss is determined At the second moment t1, the terminal device measures the second downlink path loss Receive the second path loss offset value from the network device The second uplink path loss is determined

[0176] In a possible implementation of the present application, the first uplink path loss is determined by the first downlink path loss and at least one first path loss offset value, and the second uplink path loss is determined by the second downlink path loss and at least one second path loss offset value.

[0177] As an example, at a first moment, a terminal device receives a first path loss offset value and obtains a first downlink path loss, and the terminal device determines a first uplink path loss based on the first path loss offset value and the first downlink path loss. At a second moment, the terminal device receives a second path loss offset value and measures a second downlink path loss, and the terminal device determines a second uplink path loss based on the second path loss offset value and the second downlink path loss.

[0178] In another possible implementation of the present application, the first uplink path loss is determined by the first downlink path loss and at least one first path loss offset value, and the second uplink path loss is determined by at least one first path loss offset value, the second downlink path loss, and at least one second path loss offset value.

[0179] As an example, at a first moment, a terminal device receives a first path loss offset value and measures a first downlink path loss. The terminal device determines a first uplink path loss based on the first path loss offset value and the first downlink path loss. At a second moment, the terminal device receives a second path loss offset value and measures a second downlink path loss. The second path loss offset value is used to update the first path loss offset value. The terminal device determines a second uplink path loss based on the first path loss offset value, the second downlink path loss, and the second path loss offset value.

[0180] For example, at the first moment t0, the terminal device measures the first downlink path loss Receive the first path loss offset value from the network device The first uplink path loss is determined or At the second moment t1, the terminal device measures the second downlink path loss Receive at least one second path loss offset value from a network device Second path loss bias value First path loss offset value Update, then determine the second uplink path loss or

[0181] Step S2022: The terminal device reports the power margin based on the first uplink path loss and the second uplink path loss.

[0182] In a possible embodiment of the present application, reporting the power headroom based on the first uplink path loss and the second uplink path loss includes: the terminal device reporting the power headroom when the change between the first uplink path loss and the second uplink path loss is greater than or equal to a fourth preset threshold.

[0183] The fourth preset threshold is determined by the network device.

[0184] For example, the network device sets the fourth preset threshold value to 10dB. The terminal device determines that the first uplink path loss is 70dB based on the first downlink path loss and the first path loss bias value, and determines that the second uplink path loss is 90dB based on the second downlink path loss and the second path loss bias value. The change between the first uplink path loss and the second uplink path loss is 20dB, which is greater than the first preset threshold value of 10dB, and the terminal device reports the power margin. Alternatively, the terminal device determines that the second uplink path loss is 75dB based on the second downlink path loss and the second path loss bias value. At this time, the change between the first uplink path loss and the second uplink path loss is 5dB, which is less than the first preset threshold value of 10dB, and the terminal device does not trigger the power margin report.

[0185] Optionally, the method provided in an embodiment of the present application also includes: when the change between the first uplink path loss and the second uplink path loss of the terminal device is greater than or equal to a fourth preset threshold, and the first uplink path loss has been used for power margin reporting, power margin reporting is performed.

[0186] The case where the first uplink path loss has been used for power headroom reporting may be the case where it has been used for the most recent power headroom reporting or the previous power headroom reporting, which is not limited in the embodiment of the present application.

[0187] As an example, the terminal device receives a first path loss bias value at a first moment and obtains a first downlink path loss, determines a first uplink path loss based on the first path loss bias value and the first downlink path loss, and the first uplink path loss has been used for power margin reporting before the first moment, or has been used for power margin reporting after the first moment and before the second moment, then the terminal device performs power margin reporting.

[0188] In a possible embodiment of the present application, at least one first path loss offset value is received in a first time period, and at least one second path loss offset value is received in a second time period, where the first time period is before the second time period.

[0189] As an example, the path loss bias value used for uplink transmission power control in the first time slot is obtained by accumulating multiple first path loss bias values, and the multiple first path loss bias values ​​are sent by the network device to the terminal device in a first time period before the first time slot; the path loss bias value used for uplink transmission power control in the second time slot is obtained by accumulating multiple second path loss bias values, and the multiple second path loss bias values ​​are sent by the network device to the terminal device in a second time period after the first time slot and before the second time slot.

[0190] In one possible embodiment of the present application, the terminal device may obtain the downlink path loss and receive the path loss offset value in the same time period or in different time periods. For example, if the terminal device receives the first path loss offset value in a first time period, the terminal device may obtain the first downlink path loss within a time range before or after the first time period.

[0191] In a possible implementation of the present application, the first downlink path loss is obtained at the last time before the first time period or within a first preset time period, or at the most recent time after the first time period or within a second preset time period.

[0192] The first time period and the second time period may also be a first moment and a second moment. For example, the terminal device receives a first path loss offset value at a first moment and a second path loss offset value at a second moment.

[0193] The following description is made by taking an example in which a terminal device receives a first path loss offset value at a first moment and a second path loss offset value at a second moment.

[0194] As an example, the terminal device measures the first downlink path loss once every preset time. When the terminal device receives the first path loss offset value at the first moment, the downlink path loss last measured before the first moment is used as the first downlink path loss.

[0195] For example, a terminal device measures downlink path loss every 10ms, for example, at t1, t1+10ms, and t1+20ms. When the first moment is t1+25ms, i.e., at t1+25ms, the terminal device receives the first path loss offset value and uses the downlink path loss measured at t1+20ms as the first downlink path loss. It is understood that there were multiple downlink path loss measurements before t1+25ms, and the first downlink path loss is the last measurement before the first moment.

[0196] As another example, when the terminal device receives the first path loss offset value at the first moment, the downlink path loss measured within a first preset time before the first moment is used as the first downlink path loss.

[0197] For example, the first preset time is 10ms. When the first moment is t1+25ms, that is, at t1+25ms, the terminal device receives the first path loss bias value, and the downlink path loss measured within t1+15ms~t1+25ms is used as the first downlink path loss.

[0198] As an example, the terminal device measures the first downlink path loss once every preset time. When the terminal device receives the first path loss offset value at the first moment, the downlink path loss most recently measured after the first moment is used as the first downlink path loss.

[0199] For example, a terminal device measures downlink path loss every 10ms, for example, at t1, t1+10ms, and t1+20ms. When the first moment is t1+8ms, i.e., at t1+8ms, the terminal device receives the first path loss offset value, and the downlink path loss measured at t1+10ms is used as the first downlink path loss. It is understood that multiple downlink path loss measurements are made after t1+8ms, and the first downlink path loss is the most recent measurement after the first moment.

[0200] As another example, when the terminal device receives the first path loss offset value at the first moment, the downlink path loss measured within a second preset time after the first moment is used as the first downlink path loss.

[0201] For example, the first preset time is 10ms. When the first moment is t1+8ms, that is, at t1+8ms, the terminal device receives the first path loss bias value, and the downlink path loss measured within t1+8ms~t1+18ms is used as the first downlink path loss.

[0202] It is worth noting that the first preset time and the second preset time may be the same or different, and this is not limited in the embodiments of the present application.

[0203] In a possible implementation of the present application, the second downlink path loss is obtained at the last time before the second moment, or within the first preset time, or the second downlink path loss is obtained at the most recent time after the second moment, or within the second preset time.

[0204] It is understandable that the time when the terminal device obtains the second downlink path loss is similar to the time when the terminal device obtains the first downlink path loss, and will not be repeated here.

[0205] It is worth noting that the length of the first preset time is less than the length between the first moment and the second moment. The first preset time or the second preset time and the time interval for the terminal device to measure the first downlink path loss or the second downlink path loss may be the same or different, and is not limited in the embodiments of the present application.

[0206] It is understood that when a terminal device receives at least one first path loss offset value in a first time period and at least one second path loss offset value in a second time period, the specific implementation is similar to the above embodiment and is not further described here. For example, at least one second path loss offset value may be used to update the first path loss offset value to determine a third path loss offset value, or multiple first path loss offset values ​​may be used to determine a fourth path loss offset value, and multiple second path loss offset values ​​may be used to determine a fifth path loss offset value.

[0207] In a possible embodiment of the present application, when at least one second path loss offset value is not received from the network device after at least one first path loss offset value is received, the second uplink path loss is determined by the first downlink path loss and the at least one first path loss offset value.

[0208] After receiving at least one first path loss offset value from the network device, the terminal device may not receive at least one second path loss offset value. For example, at a first moment, the network device sends at least one first path loss offset value to the terminal device, and accordingly, the terminal device receives at least one first path loss offset value from the network device at the first moment; at a second moment, the network device fails to promptly send at least one second path loss offset value to the terminal device, and accordingly, the terminal device does not receive at least one second path loss offset value at the second moment.

[0209] For example, the first downlink path loss measured by the terminal device is And receive the first path loss offset value from the network device Terminal equipment according to and Calculate the first uplink path loss The terminal device does not receive the second path loss offset value. and Calculate the second uplink path loss

[0210] In a possible embodiment of the present application, if at least one second path loss offset value is not received from the network device after at least one first path loss offset value is received, power headroom reporting is not performed.

[0211] For example, at the first moment t0, the terminal device measures the first downlink path loss to be And receive the first path loss offset value from the network device Terminal equipment according to and Calculate the first uplink path loss At the second moment t1, the terminal device measures the second downlink path loss to be But the second path loss offset value is not received. At this time, the terminal device and Calculate the second uplink path loss In other words, the first uplink path loss and the second uplink path loss are equal, that is, the change between the first uplink path loss and the second uplink path loss is 0, so the terminal device does not report the power margin.

[0212] In the present application, the terminal device obtains at least one first path loss bias value and at least one second path loss bias value sent by the network device in the first time period and the second time period respectively, and directly reports the power margin based on the at least one first path loss bias value and the at least one second path loss bias value; or, the terminal device measures the first downlink path loss and the second downlink path loss again, determines the first uplink path loss and the second uplink path loss, and then determines the change between the first uplink path loss and the second uplink path loss by comparing the two. When the change is greater than or equal to a preset threshold, the terminal device triggers the power margin reporting. In the present application, the network device indicates the path loss bias value, and the terminal device triggers the power margin reporting through the path loss bias value, which can realize the power margin reporting in the UL only TRP scenario.

[0213] In one possible embodiment of the present application, FIG4 shows another method for reporting power headroom provided by an embodiment of the present application, wherein step S301 is the same as step S201 in the above embodiment and is not described again here. Step S302, i.e., the terminal device reports power headroom based on the first path loss offset value and the second path loss offset value, includes:

[0214] Step S3021: The terminal device determines a first uplink path loss and a second uplink path loss.

[0215] The specific implementation method is referred to the above embodiment and will not be described again here.

[0216] Step S3022: The terminal device reports the power headroom based on the first uplink path loss, the second uplink path loss, and the status of the timer.

[0217] The timer is a periodic timer (phr-Periodic-Timer).

[0218] In a possible embodiment of the present application, the terminal device reports the power margin when the change between the first uplink path loss and the second uplink path loss is greater than a fourth preset threshold and the timer is in a timeout state.

[0219] It is understandable that, based on the above embodiment, when the timer is in the timeout state, the terminal device reports the power headroom. The specific implementation method is referred to the above embodiment and will not be repeated here.

[0220] Optionally, the method provided in an embodiment of the present application also includes: when the change in the terminal device between the first uplink path loss and the second uplink path loss is greater than or equal to a fourth preset threshold, the timer is in a timeout state, and the first uplink path loss has been used for power margin reporting, power margin reporting is performed.

[0221] It is understandable that the case where the first uplink path loss has been used for power headroom reporting may be that the first uplink path loss has been used for the most recent power headroom reporting, or has been used for the last power headroom reporting, which is not limited in the embodiments of the present application.

[0222] In a possible embodiment of the present application, when the terminal device does not receive at least one second path loss bias value from the network device after receiving at least one first path loss bias value, the method provided in the embodiment of the present application includes: the terminal device reports the power headroom based on the change between the first downlink path loss and the second downlink path loss and the status of the timer.

[0223] As an example, at a first moment, a terminal device receives at least one first path loss offset value from a network device and measures a first downlink path loss. At a second moment, the terminal device measures a second downlink path loss but does not receive at least one second path loss offset value from the network device. The terminal device then determines whether to report the power headroom based on the first downlink path loss, the second downlink path loss, and the state of the timer.

[0224] In a possible implementation of the present application, when a change between the first downlink path loss and the second downlink path loss is greater than a fifth preset threshold and the timer is in a timeout state, the power headroom is reported.

[0225] For example, when the path loss offset value is the difference between the downlink path loss and the uplink path loss, at the first moment t0, the terminal device measures the first downlink path loss Receive the first path loss offset value from the network device The first uplink path loss is determined At the second moment t1, the terminal device measures the second downlink path loss If the second path loss offset value from the network device is not received, the second uplink path loss is determined. At this time, if the first downlink loss and the second downstream path loss If the change in value exceeds a second preset threshold and the timer (phr-Periodic-Timer) has timed out or is in an expired state, the terminal device triggers a power headroom report.

[0226] For example, when the path loss bias value is the bias coefficient of the downlink path loss and the uplink path loss, at the first moment t0, the terminal device measures the first downlink path loss Receive the first path loss offset value from the network device The first uplink path loss is determined At the second moment t1, the terminal device measures the second downlink path loss Receive the second path loss offset value from the network device The second uplink path loss is determined At this time, if the first downlink loss and the second downstream path loss If the change in value exceeds a second preset threshold and the timer (phr-Periodic-Timer) has timed out or is in an expired state, the terminal device triggers a power headroom report.

[0227] Optionally, the method provided in an embodiment of the present application further includes: when the change between the first downlink path loss and the second downlink path loss of the terminal device is greater than or equal to a fifth preset threshold, the timer is in a timeout state, and the first downlink path loss has been used for power headroom reporting, performing power headroom reporting. The situation where the first downlink path loss has been used for power headroom reporting may mean that the first downlink path loss has been used for the most recent power headroom reporting or the previous power headroom reporting, which is not limited in the embodiments of the present application.

[0228] An embodiment of the present application provides a method for triggering power headroom reporting, wherein a network device sends at least one first path loss offset value and at least one second path loss offset value to a terminal device, wherein the at least one first path loss offset value and the at least one second path loss offset value are used to trigger power headroom reporting.

[0229] In a possible embodiment of the present application, the method provided in the embodiment of the present application includes: the network device sends a first path loss bias value to the terminal device and then sends a second path loss bias value, and triggers power headroom reporting when the change between the first path loss bias value and the second path loss bias value is greater than or equal to a first preset threshold.

[0230] In one possible embodiment of the present application, the method provided in the embodiment of the present application includes: a network device sending a first path loss offset value to a terminal device and then receiving at least one second path loss offset value, wherein the first path loss offset value and the at least one second path loss offset value are used to determine a third path loss offset value. If a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold, triggering power headroom reporting.

[0231] In one possible embodiment of the present application, the method provided in the embodiment of the present application includes: a network device sending at least one first path loss offset value and then at least one second path loss offset value to a terminal device, wherein the at least one first path loss offset value is used to determine a fourth path loss offset value, and the at least one second path loss offset value is used to determine a fifth path loss offset value. When a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold, triggering power headroom reporting.

[0232] As shown in FIG5 , an apparatus 50 for triggering power headroom reporting provided by an embodiment of the present application includes: a receiving unit 501 and a reporting unit 502 .

[0233] The receiving unit 501 is configured to receive at least one first path loss offset value and at least one second path loss offset value, where the at least one first path loss offset value and the at least one second path loss offset value are from a network device.

[0234] The reporting unit 502 is configured to report the power headroom based on at least one first path loss offset value and at least one second path loss offset value.

[0235] In one embodiment of the present application, when a second path loss bias value is received after a first path loss bias value is received, the reporting unit 502 is used to report the power headroom when the change between the first path loss bias value and the second path loss bias value is greater than or equal to a first preset threshold.

[0236] In one embodiment of the present application, when at least one second path loss offset value is received after a first path loss offset value is received, the reporting unit 502 is configured to determine a third path loss offset value based on the first path loss offset value and the at least one second path loss offset value. The reporting unit 502 is further configured to report the power headroom when a change between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

[0237] In one embodiment of the present application, when multiple second path loss offset values ​​are received after multiple first path loss offset values ​​are received, reporting unit 502 is configured to determine a fourth path loss offset value based on the multiple first path loss offset values, and to determine a fifth path loss offset value based on the multiple second path loss offset values. Reporting unit 502 is further configured to report the power headroom when a change between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold.

[0238] In one embodiment of the present application, the reporting unit 502 is configured to report the power headroom based on at least one first path loss offset value, at least one second path loss offset value, and a status of a counter.

[0239] In one embodiment of the present application, the reporting unit 502 is used to report the power headroom when the change between the first path loss bias value and the second path loss bias value is greater than or equal to the first preset threshold, or the change between the first path loss bias value and the third path loss bias value is greater than or equal to the second preset threshold, or the change between the fourth path loss bias value and the fifth path loss bias value is greater than or equal to the third preset threshold, and the timer is in a timeout state.

[0240] In one embodiment of the present application, the reporting unit 502 is further configured to determine a first uplink path loss and a second uplink path loss.

[0241] The first uplink path loss is determined by the first downlink path loss and the first path loss offset value, and the second uplink path loss is determined by the second downlink path loss and the second path loss offset value, or by the first path loss offset value, the second downlink path loss, and the second path loss offset value.

[0242] The reporting unit 502 is further configured to report the power headroom according to the first uplink path loss and the second uplink path loss.

[0243] In one embodiment of the present application, the reporting unit 502 is configured to report the power headroom when a change between the first uplink path loss and the second uplink path loss is greater than a fourth preset threshold.

[0244] In one embodiment of the present application, the first path loss offset value is received in a first time period, and the second path loss offset value is received in a second time period, and the first time period is before the second time period.

[0245] In a possible implementation, the first downlink path loss is obtained at the last time before the first time period, or within a first preset time period, or the first downlink path loss is obtained at the most recent time after the first time period, or within a second preset time period.

[0246] In a possible implementation, the second downlink path loss is obtained at the last time before the second time period or within the first preset time period, or the second downlink path loss is obtained at the most recent time after the second time period or within the second preset time period.

[0247] In one embodiment of the present application, when no second path loss offset value is received from the network device after receiving the first path loss offset value, the second uplink path loss is determined by the first downlink path loss and the first path loss offset value.

[0248] In one embodiment of the present application, if the second path loss offset value is not received from the network device after the first path loss offset value is received, the reporting unit 502 does not report the power headroom.

[0249] In one embodiment of the present application, the reporting unit 502 is further configured to report the power headroom according to a change between the first uplink path loss and the second uplink path loss, and a status of a timer.

[0250] In one embodiment of the present application, the reporting unit 502 is configured to report the power headroom when a change between the first uplink path loss and the second uplink path loss is greater than a first preset threshold and the timer is in a timeout state.

[0251] In one embodiment of the present application, when at least one second path loss bias value is not received from the network device after receiving at least one first path loss bias value, the reporting unit 502 is used to report the power headroom based on the change between the first downlink path loss and the second downlink path loss and the status of the timer.

[0252] In one embodiment of the present application, the reporting unit 502 is configured to report the power headroom when a change between the first downlink path loss and the second downlink path loss is greater than a second preset threshold and the timer is in a timeout state.

[0253] In one embodiment of the present application, the first path loss offset value is the difference or offset coefficient between the first downlink path loss and the first uplink path loss, and the second path loss offset value is the difference or offset coefficient between the second downlink path loss and the second uplink path loss.

[0254] Figure 6 shows a schematic diagram of the hardware structure of a communication device provided in an embodiment of the present application. The hardware structure of the terminal device and the network device in the embodiment of the present application can refer to the structure shown in Figure 6. The communication device includes a processor 601, a communication line 604, and at least one transceiver (Figure 6 is merely an example of including a transceiver 603).

[0255] The processor 601 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0256] Communication link 604 may include a pathway for transmitting information between the aforementioned components.

[0257] The transceiver 603 may be any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access networks (RAN), wireless local area networks (WLAN), and the like.

[0258] Optionally, the communication device may further include a memory 602 .

[0259] The memory 602 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 602 may exist independently and be connected to the processor 601 via a communication line 604. The memory 602 may also be integrated with the processor 601.

[0260] The memory 602 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 601. The processor 601 is used to execute the computer-executable instructions stored in the memory 602, thereby implementing the policy control method provided in the following embodiments of the present application.

[0261] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0262] In a specific implementation, as an embodiment, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG6 .

[0263] In a specific implementation, as an embodiment, a communication device may include multiple processors, such as processor 601 and processor 605 in Figure 6. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0264] The present application also provides a communication device, which can be a terminal device or a chip, and can be used to execute the above method embodiment.

[0265] When the communication device is a terminal device, Figure 7 shows a simplified structural diagram of the terminal device. For ease of understanding and illustration, in Figure 7, a mobile phone is used as an example of the terminal device. As shown in Figure 7, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal device, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for converting baseband signals into radio frequency signals and processing radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

[0266] When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in Figure 7. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and this is not limited in the embodiments of the present application.

[0267] In the embodiment of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device.

[0268] As shown in Figure 7, the terminal device includes a transceiver unit 710 and a processing unit 720. The transceiver unit 710 may also be referred to as a transceiver, transceiver, or transceiver device. The processing unit 720 may also be referred to as a processor, processing board, processing module, or processing device. Optionally, the device in the transceiver unit 710 that implements the receiving function may be considered a receiving unit, and the device in the transceiver unit 710 that implements the transmitting function may be considered a transmitting unit. That is, the transceiver unit 710 includes a receiving unit and a transmitting unit. The transceiver unit may also be referred to as a transceiver, transceiver, or transceiver circuit. The receiving unit may also be referred to as a receiver, receiver, or receiving circuit. The transmitting unit may also be referred to as a transmitter, transmitter, or transmitting circuit.

[0269] For example, in one implementation, the processing unit 720 is configured to execute the above method embodiment. The transceiver unit 710 is configured to perform the relevant transceiver operations in the above method embodiment. For example, the transceiver unit 710 is configured to send or receive DFT-s-OFDM symbols or SC-QAM symbols.

[0270] It should be understood that FIG7 is merely an example and not a limitation, and the terminal device including the transceiver unit and the processing unit may not rely on the structure shown in FIG7 .

[0271] When the communication device is a chip, the chip includes a transceiver unit and a processing unit, wherein the transceiver unit may be an input / output circuit or a communication interface; and the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

[0272] The present application also provides a communication device, which can be a network device or a chip. The communication device can be used to execute the above method embodiment. When the communication device is a network device, for example, it is a base station.

[0273] Figure 8 shows a simplified schematic diagram of a base station structure. The base station includes sections 810 and 820. Section 810 is primarily responsible for receiving and transmitting RF signals and converting RF signals to baseband signals; section 820 is primarily responsible for baseband processing and base station control. Section 810 can be commonly referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver. Section 820 is typically the base station's control center, often referred to as a processing unit, responsible for controlling the base station to execute the network device-side processing operations described in the aforementioned method embodiments.

[0274] The transceiver unit in section 810, also known as a transceiver or transceiver, includes an antenna and a radio frequency unit (RFU), with the RF unit primarily responsible for RF processing. Alternatively, the device in section 810 that implements the receiving function can be considered a receiving unit, and the device that implements the transmitting function can be considered a transmitting unit. That is, section 810 includes both a receiving unit and a transmitting unit. The receiving unit can also be referred to as a receiver, receiver, or receiving circuit, and the transmitting unit can be referred to as a transmitter, transmitter, or transmitting circuit.

[0275] Section 820 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If multiple boards are present, the boards may be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may simultaneously share one or more processors.

[0276] For example, in one implementation, section 820 is used to perform the above method embodiment. Section 810 is used for the related transceiver operations in the above method embodiment. For example, section 810 is used to send or receive DFT-s-OFDM symbols or SC-QAM symbols.

[0277] It should be understood that FIG8 is only an example and not a limitation, and the network device including the transceiver unit and the processing unit may not rely on the structure shown in FIG8.

[0278] 9 is a schematic diagram of the structure of a chip 900 provided in an embodiment of the present application. The chip 900 includes one or more (including two) processors 910 and a communication interface 930.

[0279] Optionally, the chip 900 further includes a memory 940, which may include a read-only memory and a random access memory, and provides operation instructions and data to the processor 910. A portion of the memory 940 may also include a non-volatile random access memory (NVRAM).

[0280] In some embodiments, the memory 940 stores the following elements, execution modules or data structures, or a subset thereof, or an extended set thereof.

[0281] In the embodiment of the present application, the corresponding operation is performed by calling the operation instruction stored in the memory 940 (the operation instruction may be stored in the operating system).

[0282] The processor 910 controls processing operations of either the first terminal or the base station. The processor 910 may also be referred to as a central processing unit (CPU).

[0283] Memory 940 may include read-only memory and random access memory, and provides instructions and data to processor 910. A portion of memory 940 may also include NVRAM. For example, in an application, memory 940, communication interface 930, and memory 940 are coupled together via bus system 920. Bus system 920 may include not only a data bus but also a power bus, a control bus, and a status signal bus. However, for clarity, various buses are labeled as bus system 920 in FIG. 9 .

[0284] The methods disclosed in the above embodiments of the present application can be applied to or implemented by processor 910. Processor 910 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in processor 910 or by software instructions. The above processor 910 can be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory 940 , and the processor 910 reads the information in the memory 940 and completes the steps of the above method in combination with its hardware.

[0285] The above communication unit may be a communication interface of the device, used to receive signals from other devices. For example, when the device is implemented as a chip, the communication unit is a communication interface of the chip used to receive or send signals from other chips or devices.

[0286] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a computer, the computer is enabled to implement the above method embodiment.

[0287] The embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the above method embodiment.

[0288] The explanation of the relevant contents and beneficial effects of any of the communication devices provided above can be referred to the corresponding method embodiments provided above, and will not be repeated here.

[0289] In an embodiment of the present application, a terminal device or a network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application. As long as it is possible to communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or the network device that can call a program and execute the program.

[0290] In addition, various aspects or features of the present application can be implemented as methods, apparatus, or articles of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used in this application covers computer programs that can be accessed from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0291] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0292] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAMbus RAM (DR RAM).

[0293] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated into the processor.

[0294] It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0295] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0296] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0297] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0298] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0299] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0300] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0301] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for triggering power margin reporting, characterized in that The method includes: Receiving at least one first path loss offset value and at least one second path loss offset value, where at least one of the at least one first path loss offset value and at least one of the at least one second path loss offset value are from a network device; Based on at least one of the at least one first path loss offset value and at least one of the at least one second path loss offset value, performing a power margin report.

2. The method according to claim 1, characterized in that, In the case where one of the second path loss offset values is received after one of the first path loss offset values is received, the performing a power margin report based on at least one of the at least one first path loss offset value and at least one of the at least one second path loss offset value includes: Performing the power margin report when a change amount between the first path loss offset value and the second path loss offset value is greater than or equal to a first preset threshold.

3. The method according to claim 2, wherein The method further includes: Performing the power margin report when the change amount between the first path loss offset value and the second path loss offset value is greater than or equal to the first preset threshold and the first path loss offset value has been used for the power margin report.

4. The method according to claim 1, characterized in that In the case where at least one of the second path loss offset values is received after one of the first path loss offset values is received, the performing a power margin report based on at least one of the at least one first path loss offset value and at least one of the at least one second path loss offset value includes: Determining a third path loss offset value based on the first path loss offset value and at least one of the at least one second path loss offset value; Performing the power margin report when a change amount between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

5. The method according to claim 1, wherein In the case where multiple second path loss offset values are received after multiple first path loss offset values are received, the performing a power margin report based on at least one of the at least one first path loss offset value and at least one of the at least one second path loss offset value includes: Determining a fourth path loss offset value based on multiple first path loss offset values; Determining a fifth path loss offset value based on multiple second path loss offset values; Performing the power margin report when a change amount between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold.

6. The method according to any one of claims 1 to 5, characterized in that The method includes: Performing a power margin report based on at least one of the at least one first path loss offset value and at least one of the at least one second path loss offset value, and a status of a counter.

7. The method according to claim 6, wherein The method includes: Performing the power margin report when a change amount between the first path loss offset value and the second path loss offset value is greater than or equal to a first preset threshold, or a change amount between the first path loss offset value and a third path loss offset value is greater than or equal to a second preset threshold, or a change amount between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold, and a timer is in an overtime state.

8. The method according to claim 2, 3 or 7, characterized in that, The method includes: Performing the power margin report when a change amount between the first path loss offset value and the second path loss offset value is greater than or equal to a first preset threshold, the timer is in an overtime state, and the first path loss offset value has been used for the power margin report.

9. The method according to any one of claims 1 to 5, characterized in that Performing power headroom reporting based on at least one of the first path loss offset values and at least one of the second path loss offset values includes: Determining a first uplink path loss and a second uplink path loss, where the first uplink path loss is determined by a first downlink path loss and at least one of the first path loss offset values, and the second uplink path loss is determined by a second downlink path loss and at least one of the second path loss offset values, or is determined by at least one of the first path loss offset values, the second downlink path loss, and at least one of the second path loss offset values; Performing the power headroom reporting according to the first uplink path loss and the second uplink path loss.

10. The method according to claim 9, wherein The performing the power headroom reporting according to the first uplink path loss and the second uplink path loss includes: Performing the power headroom reporting when a change amount between the first uplink path loss and the second uplink path loss is greater than or equal to a fourth preset threshold.

11. The method according to claim 10, wherein The method further includes: Performing the power headroom reporting when the change amount between the first uplink path loss and the second uplink path loss is greater than or equal to the fourth preset threshold and the first uplink path loss has been used for the power headroom reporting.

12. The method according to any one of claims 1 to 8, characterized in that, At least one of the first path loss offset values is received in a first time period, and at least one of the second path loss offset values is received in a second time period, where the first time period is before the second time period.

13. The method according to claim 12, wherein The first downlink path loss is obtained at the last time before the first time period or within a first preset time; Alternatively, the first downlink path loss is obtained at the most recent time after the first time period or within a second preset time.

14. The method according to claim 12, wherein The second downlink path loss is obtained at the last time before the second time period or within a first preset time; Alternatively, the second downlink path loss is obtained at the most recent time after the second time period or within a second preset time.

15. The method according to any one of claims 9 to 11, characterized in that When at least one of the second path loss offset values from the network device is not received after receiving at least one of the first path loss offset values, the second uplink path loss is determined by the first downlink path loss and at least one of the first path loss offset values.

16. The method according to claim 15, wherein When at least one of the second path loss offset values from the network device is not received after receiving at least one of the first path loss offset values, the power headroom reporting is not performed.

17. The method according to claim 9, characterized in that, The method further includes: Performing the power headroom reporting according to a change amount between the first uplink path loss and the second uplink path loss and a status of a timer.

18. The method according to claim 17, wherein The method includes: Performing the power headroom reporting when the change amount between the first uplink path loss and the second uplink path loss is greater than or equal to the fourth preset threshold and the timer is in an overtime state.

19. The method according to claim 18, wherein The method includes: Performing the power headroom reporting when the change amount between the first uplink path loss and the second uplink path loss is greater than or equal to the fourth preset threshold, the timer is in an overtime state, and the first uplink path loss has been used for the power headroom reporting.

20. The method according to any one of claims 17 to 19, characterized in that When at least one of the second path loss offset values from the network device is not received after receiving at least one of the first path loss offset values, the method includes: Perform the power headroom reporting according to the variation between the first downlink path loss and the second downlink path loss and the status of the timer.

21. The method according to claim 20, wherein The method includes: Perform the power headroom reporting when the variation between the first downlink path loss and the second downlink path loss is greater than or equal to a fifth preset threshold and the timer is in an overtime state.

22. The method according to claim 21, wherein, The method includes: Perform the power headroom reporting when the variation between the first downlink path loss and the second downlink path loss is greater than or equal to the fifth preset threshold, the timer is in an overtime state, and the first downlink path loss has been used for the power headroom reporting.

23. The method according to any one of claims 1 to 22, characterized in that, The first path loss offset value is the difference or offset coefficient between the first downlink path loss and the first uplink path loss, and the second path loss offset value is the difference or offset coefficient between the second downlink path loss and the second uplink path loss.

24. A method for triggering power margin reporting, characterized in that The method includes: Send at least one first path loss offset value and at least one second path loss offset value to the terminal device, where at least one of the first path loss offset values and at least one of the second path loss offset values are used to trigger the power headroom reporting.

25. The method according to claim 24, wherein The method includes: Send one of the first path loss offset values to the terminal device and then send one of the second path loss offset values. Trigger the power headroom reporting when the variation between the first path loss offset value and the second path loss offset value is greater than or equal to a first preset threshold.

26. The method according to claim 24, wherein The method includes: Send one of the first path loss offset values to the terminal device and then send at least one of the second path loss offset values. The first path loss offset value and at least one of the second path loss offset values are used to determine a third path loss offset value; Trigger the power headroom reporting when the variation between the first path loss offset value and the third path loss offset value is greater than or equal to a second preset threshold.

27. The method according to claim 24, wherein The method includes: Send at least one of the first path loss offset values to the terminal device and then send at least one of the second path loss offset values. At least one of the first path loss offset values is used to determine a fourth path loss offset value, and at least one of the second path loss offset values is used to determine a fifth path loss offset value; Trigger the power headroom reporting when the variation between the fourth path loss offset value and the fifth path loss offset value is greater than or equal to a third preset threshold.

28. A terminal device, characterized in that, The terminal device includes a memory and a processor. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory. The execution of the instructions stored in the memory causes the processor to execute the method according to any one of claims 1 to 23, or execute the method according to any one of claims 24 to 27.

29. A chip, characterized in that, The chip includes at least one processor and a communication interface. The communication interface is coupled to the at least one processor. The at least one processor is used to run a computer program or instructions to implement the method according to any one of claims 1 to 23, or implement the method according to any one of claims 24 to 27. The communication interface is used to communicate with other modules outside the chip.

30. A computer-readable storage medium, characterized in that, Instructions are stored in the computer-readable storage medium, and when the instructions are run, the method described in any one of claims 1 to 23 above is implemented, or the method described in any one of claims 24 to 27 above is implemented.

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