CN116743283A

CN116743283A - Communication method, device and system

Info

Publication number: CN116743283A
Application number: CN202210209279.9A
Authority: CN
Inventors: 丁洋; 李胜钰; 李锐杰; 官磊; 苏桐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2023-09-12
Also published as: WO2023165460A1

Abstract

The embodiment of the application provides a communication method, a device and a system. In the method, the network equipment indicates the power change to the terminal equipment, and the terminal equipment timely acquires the change of the transmission power of the network equipment, so that more accurate channel state information is obtained.

Description

Communication method, device and system

Technical Field

The present application relates to the field of communications. And more particularly, to a communication method, apparatus, and system.

Background

With the development of communication technology, the frequency spectrum used by the communication system is wider, the number of configured transmitting antennas is larger and larger, and the overall consumption power of the network equipment is increased. But the power consumption at the network device side is not proportional to the traffic load. For this purpose, the network device may save energy by switching off the fractional transmission channel. However, the terminal device cannot learn the power change of the network device, which may affect the channel measurement of the terminal device and affect the communication quality.

Disclosure of Invention

The embodiment of the application provides a communication method, a device and a system, which can improve the accuracy of channel measurement of terminal equipment and improve the communication quality.

In a first aspect, an embodiment of the present application provides a communication method, which may be performed by a terminal device, or may also be performed by a chip or a circuit for a terminal device, which is not limited in this aspect. For convenience of description, an example will be described below in terms of execution by the terminal device. The method may include: and receiving first information, wherein the first information is used for configuring first transmission power of a first channel state information reference signal (channel state information-reference signal, CSI-RS), and receiving second information, wherein the second information is used for indicating power offset of the first CSI-RS, and determining second transmission power of the first CSI-RS according to the first transmission power and the power offset.

According to the method, the change of the transmission power of the network equipment is indicated to the terminal equipment through the network equipment, so that the terminal equipment can timely determine the transmission power of the CSI-RS after the change, the accuracy of channel measurement of the terminal equipment can be improved, and the communication quality is further improved.

With reference to the first aspect, in certain possible implementation manners of the first aspect, the second information is used to indicate the power offset, including: the second information is a difference between the first transmission power and the second transmission power.

With reference to the first aspect, in some possible implementations of the first aspect, the power offset is a difference between a reference value and the second transmission power, where the reference value is a transmission power of a physical broadcast channel (physical broadcast channel, PBCH) synchronization signal and a PBCH block (Synchronization Signal and PBCH block, SSB), or the reference value is a predefined value.

In the above manner, the network device directly transmits the power variation to the terminal device, so that the efficiency of determining the second transmission power by the terminal device can be improved.

With reference to the first aspect, in certain possible implementation manners of the first aspect, the second information is used to indicate the power offset, including: the second indication information is a second antenna port number, the second antenna port number is the port number of the first CSI-RS under the second transmission power, the power offset of the first CSI-RS is determined according to the second antenna port number and the first antenna port number, and the first antenna port number is the antenna port number of the first CSI-RS under the first transmission power.

With reference to the first aspect, in certain possible implementation manners of the first aspect, the second information is used to indicate the power offset, including: the second information is offset of antenna port number, the offset of the antenna port number is a difference value between a first antenna port number and a second antenna port number, the first antenna port number is the antenna port number of the first CSI-RS under the first transmitting power, the second antenna port number is the port number of the first CSI-RS under the second transmitting power, and the second transmitting power is determined according to the first transmitting power and the ratio of the first antenna port number to the second antenna port number.

In the above manner, the network device may send the number of antenna ports after the power change to the terminal device, or the network device may send the variable quantity of the number of antenna ports to the terminal device, thereby improving flexibility of indicating the power bias by the network device.

With reference to the first aspect, in some possible implementations of the first aspect, a first Reference Signal Received Power (RSRP) corresponding to the first transmission power is determined according to the first CSI-RS, and a second reference signal received power of the first CSI-RS corresponding to the second transmission power is determined according to the power offset and the first RSRP.

In this manner, the terminal device determines the second reference signal received power according to the power offset and the first RSRP, and may add the power offset to obtain the second reference signal received power on the basis of the first RSRP. The terminal equipment updates the reference signal receiving power, can be aligned with the power change of the network equipment in time, and improves the communication quality.

With reference to the first aspect, in some possible implementation manners of the first aspect, a second reference signal receiving power corresponding to the second transmitting power is determined according to a second CSI-RS, where the second CSI-RS is a next CSI-RS adjacent to the first CSI-RS, or the second CSI-RS is a CSI-RS indicated by the second information.

In this way, the terminal device can improve the accuracy of determining the second reference signal received power by re-measuring and acquiring the second reference signal received power. The network device indicates the second CSI-RS through the second information, which can further save signaling overhead.

With reference to the first aspect, in some possible implementation manners of the first aspect, before determining, according to the second CSI-RS, a second reference signal received power corresponding to the second transmission power, a physical random access channel is sent according to the second information, where the physical random access channel is used to trigger a beam failure recovery procedure.

In the mode, the terminal equipment can trigger the beam failure recovery flow, re-measure the channel state and flexibly acquire the reference signal receiving power after the power change.

With reference to the first aspect, in some possible implementation manners of the first aspect, the second path loss is determined according to the second reference signal received power and the second transmission power.

With reference to the first aspect, in some possible implementation manners of the first aspect, a third transmission power of the uplink channel is determined according to the second path loss.

In the above manner, the terminal device updates the path loss according to the reference signal received power after the power change, updates the transmission power of the uplink channel, and can improve the communication quality of the uplink transmission of the terminal device.

With reference to the first aspect, in some possible implementation manners of the first aspect, a power headroom is determined according to the second path loss, and the power headroom is reported.

In the mode, the terminal equipment indicates the updated path loss to the network equipment through the power margin, so that the network equipment can learn the path loss change, adjust the downlink transmission power in time, and improve the communication quality.

With reference to the first aspect, in some possible implementations of the first aspect, the power offset is greater than or equal to a first threshold.

In other words, the terminal device performs the above-described manner when the power offset is greater than or equal to the first threshold. That is, when the power change is greater than a certain degree, or the path loss change is greater than a certain degree, the channel measurement result is updated again, so that the power consumption of the terminal device can be saved. The first threshold may be indicated to the terminal device by the network device, or may be predefined, which is not limited by the embodiment of the present application.

With reference to the first aspect, in some possible implementation manners of the first aspect, the second information is downlink control information.

The network device dynamically indicates the power bias and the like through the downlink control information, so that the timeliness of the acquisition of the terminal device can be improved, and the efficiency of updating the channel measurement result between the network device and the terminal device is further improved.

With reference to the first aspect, in some possible implementations of the first aspect, the second information is scrambled by a group radio network temporary identity G-RNTI.

That is, the network device may notify the power change situation to the plurality of terminal devices, and may indicate to the terminal devices through broadcasting or multicasting, etc., which is not limited by the embodiment of the present application.

With reference to the first aspect, in some possible implementations of the first aspect, the first information is further used to indicate a first antenna port number.

In a second aspect, embodiments of the present application provide a communication method, which may be performed by a network device, or may be performed by a chip or a circuit for a network device, which is not limited in this aspect. For ease of description, the following description will be given by way of example as being executed by a network device. The method may include: and transmitting first information, wherein the first information is used for configuring first transmission power of a first channel state information reference signal (CSI-RS), and transmitting second information, and the second information is used for indicating power offset of the first CSI-RS.

With reference to the second aspect, in certain possible implementations of the second aspect, the second information is used to indicate the power offset, including: the second information is a difference between the first transmission power and the second transmission power.

With reference to the second aspect, in certain possible implementations of the second aspect, the second information is used to indicate the power offset, including: the second indication information is a second antenna port number, and the second antenna port number is the port number of the first CSI-RS under the second sending power.

With reference to the second aspect, in certain possible implementations of the second aspect, the second information is used to indicate the power offset, including: the second information is offset of antenna port number, the offset of the antenna port number is a difference value between a first antenna port number and a second antenna port number, the first antenna port number is the antenna port number of the first CSI-RS under the first transmitting power, and the second antenna port number is the port number of the first CSI-RS under the second transmitting power.

With reference to the second aspect, in some possible implementations of the second aspect, a physical random access channel is received, where the physical random access channel is used to trigger a beam failure recovery procedure.

With reference to the second aspect, in some possible implementations of the second aspect, a power headroom is received, where the power headroom is determined according to a second path loss, and the path loss is determined according to the second reference signal received power and the second transmission power.

With reference to the second aspect, in some possible implementations of the second aspect, the power bias is greater than or equal to a first threshold.

With reference to the second aspect, in some possible implementations of the second aspect, the second information is downlink control information.

With reference to the second aspect, in some possible implementations of the second aspect, the second information is scrambled by a group radio network temporary identity G-RNTI.

It should be understood that the second aspect is a method on the network device side corresponding to the first aspect, and descriptions of relevant explanation, supplement and beneficial effects of the first aspect are equally applicable to the second aspect, and are not repeated herein.

In a third aspect, an embodiment of the present application provides a communication apparatus, where the apparatus includes a processing unit and a transceiver unit, where the transceiver unit may be configured to receive first information, where the first information is used to configure a first transmission power of a first CSI-RS, and the transceiver unit is further configured to receive second information, where the second information is used to indicate a power offset of the first CSI-RS, and the processing unit is configured to determine a second transmission power of the first CSI-RS according to the first transmission power and the power offset.

With reference to the third aspect, in some possible implementation manners of the third aspect, the transceiver unit is further configured to send a physical random access channel according to the second information, where the physical random access channel is used to trigger a beam failure recovery procedure.

With reference to the third aspect, in some possible implementations of the third aspect, the transceiver unit is further configured to report the power headroom.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, where the apparatus includes a processing unit and a transceiver unit, where the transceiver unit may be configured to send first information, where the first information is used to configure a first transmission power of a first channel state information reference signal CSI-RS, and the transceiver unit is further configured to send second information, where the second information is used to indicate a power offset of the first CSI-RS.

With reference to the fourth aspect, in some possible implementations of the fourth aspect, the transceiver unit is further configured to receive a physical random access channel, where the physical random access channel is used to trigger a beam failure recovery procedure.

With reference to the fourth aspect, in some possible implementations of the fourth aspect, the transceiver unit is further configured to receive the power headroom.

It should be understood that the third aspect and the fourth aspect are implementation manners on the device side corresponding to the first aspect and the second aspect, and descriptions of relevant explanations, supplements, possible implementation manners and beneficial effects of the first aspect and the second aspect are equally applicable to the third aspect and the fourth aspect, respectively, and are not repeated herein.

In a fifth aspect, an embodiment of the present application provides a communication device, including an interface circuit for implementing the function of the transceiver module in the third aspect, and a processor for implementing the function of the processing module in the third aspect.

In a sixth aspect, an embodiment of the present application provides a communication device, including an interface circuit for implementing the function of the transceiver module in the fourth aspect, and a processor for implementing the function of the processing module in the fourth aspect.

In a seventh aspect, embodiments of the present application provide a computer readable medium storing program code for execution by a terminal device, the program code comprising instructions for performing the method of the first aspect, or any one of the possible manners of the first aspect, or all of the possible manners of the first aspect.

In an eighth aspect, embodiments of the present application provide a computer readable medium storing program code for execution by a network device, the program code comprising instructions for performing the method of the second aspect, or any or all of the possible ways of the second aspect.

In a ninth aspect, there is provided a computer program product storing computer readable instructions which, when run on a computer, cause the computer to perform the method of the first aspect described above, or any one of the possible ways of the first aspect, or all of the possible ways of the first aspect.

In a tenth aspect, there is provided a computer program product storing computer readable instructions which, when run on a computer, cause the computer to perform the method of the second aspect described above, or any or all of the possible ways of the second aspect.

An eleventh aspect provides a communication system comprising means having the functions of implementing the first aspect, or any of the possible ways of the first aspect, or all of the possible ways of the first aspect, and all of the possible designs, and means having the functions of the second aspect, or any of the possible ways of the second aspect, or all of the possible ways of the second aspect, and all of the possible designs.

A twelfth aspect provides a processor, coupled to a memory, for performing the method of the first aspect, or any or all of the possible ways of the first aspect.

A thirteenth aspect provides a processor for coupling with a memory for performing the method of the second aspect described above, or any or all of the possible ways of the second aspect.

In a fourteenth aspect, a chip system is provided, the chip system comprising a processor, and may further comprise a memory for executing a computer program or instructions stored in the memory, such that the chip system implements the method of any of the foregoing first or second aspects, and any possible implementation of any of the foregoing aspects. The chip system may be formed of a chip or may include a chip and other discrete devices.

A fifteenth aspect provides a computer program product having stored thereon computer readable instructions which, when run on a computer, cause the computer to perform the method of the first aspect described above, or any one of the possible ways of the first aspect, or all of the possible implementations of the first aspect.

In a sixteenth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the method of the second aspect described above, or any one of the possible manners of the second aspect, or all of the possible implementations of the second aspect.

A seventeenth aspect provides a communication system comprising at least one communication device as claimed in the third aspect and/or at least one communication device as claimed in the fourth aspect, the communication system being arranged to implement the above-described first or second aspect, or any one of the possible manners of the first or second aspect, or a method of all of the possible manners of the first or second aspect.

Drawings

Fig. 1 shows a system architecture to which an embodiment of the present application is applied.

Fig. 2 is a schematic diagram of a communication method according to an embodiment of the present application.

Fig. 3 is a schematic diagram of another communication method according to an embodiment of the present application.

Fig. 4 shows a flow chart of a communication method according to an embodiment of the present application.

Fig. 5 shows a flow chart of another communication method according to an embodiment of the present application.

Fig. 6 shows a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 7 shows a schematic block diagram of yet another communication device provided by an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which an embodiment of the application applies. As shown in fig. 1, the communication system comprises a radio access network 100 and a core network 200, and optionally the communication system 1000 may further comprise the internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in fig. 1) and may also include at least one terminal (e.g., 120a-120j in fig. 1). The terminal is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminals and the radio access network device may be connected to each other by wired or wireless means. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1.

The radio access network device may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a fifth generation (5th generation,5G) mobile communication system, a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; the present application may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The CU can complete the functions of a radio resource control protocol and a packet data convergence layer protocol (packet data convergence protocol, PDCP) of the base station and can also complete the functions of a service data adaptation protocol (service data adaptation protocol, SDAP); the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of a part of the physical layer or the entire physical layer, and for a detailed description of the above protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The radio access network device may be a macro base station (e.g. 110a in fig. 1), a micro base station or an indoor station (e.g. 110b in fig. 1), a relay node or a donor node, etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the wireless access network equipment. For convenience of description, a base station will be described below as an example of a radio access network device.

A terminal may also be referred to as a terminal device, user Equipment (UE), mobile station, mobile terminal, etc. The terminal may be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal.

The base station and the terminal may be fixed in position or movable. Base stations and terminals may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aircraft, balloons and satellites. The embodiment of the application does not limit the application scenes of the base station and the terminal.

The roles of base station and terminal may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured as a mobile base station, terminal 120i being the base station for those terminals 120j that access radio access network 100 through 120 i; but for base station 110a 120i is a terminal, i.e., communication between 110a and 120i is via a wireless air interface protocol. Of course, communication between 110a and 120i may be performed via an interface protocol between base stations, and in this case, 120i is also a base station with respect to 110 a. Thus, both the base station and the terminal may be collectively referred to as a communication device, 110a and 110b in fig. 1 may be referred to as a communication device having base station functionality, and 120a-120j in fig. 1 may be referred to as a communication device having terminal functionality.

Communication can be carried out between the base station and the terminal, between the base station and between the terminal and the terminal through the authorized spectrum, communication can be carried out through the unlicensed spectrum, and communication can also be carried out through the authorized spectrum and the unlicensed spectrum at the same time; communication can be performed through a frequency spectrum of 6 gigahertz (GHz) or less, communication can be performed through a frequency spectrum of 6GHz or more, and communication can be performed using a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more simultaneously. The embodiment of the application does not limit the spectrum resources used by the wireless communication.

In the embodiment of the present application, the functions of the base station may be performed by a module (such as a chip) in the base station, or may be performed by a control subsystem including the functions of the base station. The control subsystem comprising the base station function can be a control center in the application scenarios of smart power grids, industrial control, intelligent transportation, smart cities and the like. The functions of the terminal may be performed by a module (e.g., a chip or a modem) in the terminal, or by a device including the functions of the terminal.

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication equipment. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal, wireless communication between a network device and a network device, and wireless communication between a terminal device and a terminal device. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".

It should be understood that in the embodiment of the present application, the physical uplink shared channel (physical downlink share channel, PDSCH), the physical downlink control channel (physical downlink control channel, PDCCH) and the physical uplink shared channel (physical uplink share channel, PUSCH) are merely examples of downlink data channels, downlink control channels and uplink data channels, respectively, and the data channels and the control channels may have different names in different systems and different scenarios, and the embodiment of the present application is not limited thereto.

In order to facilitate understanding of the aspects of the embodiments of the present application, a description will be made of related concepts.

1. Channel state information (channel state information, CSI): during the transmission of a signal from a transmitting end to a receiving end over a wireless channel, fading occurs due to the possibility of scattering, reflection and attenuation of energy with distance. CSI is used to characterize the wireless channel and may include at least one of precoding matrix indicator (Pre-coding Matrix Indicator, PMI), channel quality indicator (Channel Quantity Indicator, CQI), CSI-RS resource indicator (CSI-RS resource indicator, CRI), synchronization signal and physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) resource indicator (SSB resource indicator, SSBRI), layer Indicator (LI), rank Indicator (RI), -reference signal received power (reference signal received power, RSRP), and signal-to-interference-and-noise ratio (signal to interference plus noise ratio, SINR). CSI may be transmitted by the terminal device to the network device over a physical uplink control channel (physical uplink control channel, PUCCH) or a physical uplink shared channel (physical uplink share channel, PUSCH).

2. Channel state information reporting configuration (CSI-ReportConfig): the method is mainly used for configuring parameters related to channel state reporting, such as reporting types, reported measurement indexes and the like. Reporting a configuration identifier (reportConfigId), which is an Identifier (ID) number of the CSI-ReportConfig, for marking the CSI-ReportConfig; a channel measurement resource (resource-Reference Signal, CSI-RS) for configuring a channel state information-Reference Signal (CSI-RS) resource of a channel measurement, which is associated to a resource configuration through a CSI report resource identifier (CSI-resource configuration id); interference measurement resources (CSI-IM-resources forinterference), resources of CSI-RS configured for interference measurement, are associated to the resource configuration by CSI-ResourceConfigId.

Optionally, the parameters of CSI reporting may include CSI reporting type (reportConfigType), CSI reporting amount (reportconquality), etc., and the network device may configure through different reporting amounts, so that the terminal device reports different CSI,

3. channel state information resource configuration (CSI-ResourceConfig): resource-related information for configuring CSI measurements. May include a CSI report resource identification (CSI-ResourceConfigId) and/or a CSI resource binding queue (CSI-RS-resourcesitsist), etc. Wherein, CSI-ResourceConfigId is used to mark the CSI-ResourceConfig; the CSI-RS-resourcesist may include a set of resources for channel measurements and a set of resources for interference measurements.

CSI report (CSI report): the CSI report is sent by the terminal to the base station, and is used for the network device to learn the channel state when the network device sends downlink information to the terminal device. The 1 CSI report is used to instruct the terminal device to feed back 1 CSI, and different CSI may correspond to different frequency bands, different transmission hypotheses, different reporting modes or reporting amounts.

In general, one CSI report may be associated with 1 reference signal resource for channel measurement, and may also be associated with 1 or more reference signal resources for interference measurement. One CSI report corresponds to one transmission resource, and a transmission resource corresponding to CSI can also be understood as a time-frequency resource for transmitting the CSI.

5. Reference signal: is a known signal provided by the transmitting end to the receiving end for channel estimation or channel sounding. In the embodiment of the application, the reference signal may be used for channel measurement, interference measurement, etc., such as measuring parameters of reference signal received quality (reference signal receiving quality, RSRQ), SINR, CQI, PMI, etc.

6. Reference signal resources: including at least one of time-frequency resources, antenna ports, power resources, scrambling codes, and the like of the reference signal. The network device may send reference signals to the terminal device based on the reference signal resources, and correspondingly, the terminal device may receive reference signals based on the reference signal resources.

The reference signals involved in the embodiments of the present application may include one or more of the following reference signals: channel state information reference signals (channel state information-reference signals, CSI-RS), SSB, or sounding reference signals (sounding reference signal, SRS). Correspondingly, the reference signal resources may include CSI-RS resources, SSB resources, or SRS resources. In some cases, SSB may also refer to SSB resources.

7. Pathloss (PL): the short term of path loss refers to the difference between the transmitting power and the receiving power caused by channel fading in the process of transmitting an electromagnetic signal from a transmitting end to a receiving end. In general, the farther the distance, the greater the path loss. For signals sent by the network device to the terminal device, the terminal device can obtain PL according to different CSI-RS resource measurements.

8. The power headroom report (power headroom report, PHR) refers to the difference between the actual transmit power and the maximum transmit power achievable by the terminal device when the terminal device transmits uplink information. The actual transmit power takes PL into account in the calculation. One effect of the power headroom report is to inform the network device that the current terminal device PL can be used for the network device to adjust the power of the uplink transmission of the terminal device.

9. Beam failure recovery flow: when the UE detects that the RSRP for beam failure detection is below the threshold, signal decoding failure may result. When the UE fails to decode N consecutive times, the terminal device considers that the beam fails, and at this time, the terminal device sends a Physical Random Access Channel (PRACH) to the network device through the new beam.

With the development of cellular communication technology, the frequency spectrum used by a communication system is wider, the number of configured transmitting antennas is larger, and the overall power consumption of network equipment is higher. However, the power consumption of the network device side is not proportional to the traffic load, and the power consumption of the network device on each TTI includes many parts, for example, dynamic parts related to the load, such as power consumption caused by implementing related communication through dynamic signaling such as downlink control information (downlink control information, DCI); the power consumption of the network device per TTI also includes a static part independent of the load, such as the power consumption of the device's hardware structure itself. For this reason, researchers have proposed a method of turning off part of the transmitting antenna to achieve the purpose of saving power of the network device. However, the terminal device cannot timely learn the change of the transmitting antenna of the network device, so that it is difficult to determine the power change of the network device, which may cause inaccurate channel measurement results of the terminal device and further affect the communication quality of the terminal device.

In order to improve accuracy of channel measurement of a terminal device and improve communication quality, an embodiment of the present application proposes a communication method, as shown in fig. 2, which may include the following steps:

step 201: the network device sends first information to the terminal device, and correspondingly, the terminal device receives the first information.

The first information is used to configure a first transmit power of the first CSI-RS. The first transmission power may be a power at which the network device transmits the first CSI-RS before the number of antenna ports is changed.

The first information may be carried in radio resource control (radio resource control, RRC) signaling. For example, the first information may be a channel state information report configuration field, or the first information may be a channel state information resource configuration field. Alternatively, the network device may send downlink control information DCI to the terminal device, where the DCI includes the first transmission power, or alternatively, the first information may be carried in a medium access control element (media access control control element, MAC CE).

In an alternative manner, the first information may indicate the first transmission power of the first CSI-RS, in a display manner. Alternatively, the first information may implicitly indicate the first transmission power of the first CSI-RS, e.g., the first information indicates a bias of the first transmission power with respect to other known signal transmission powers.

For example one, when the first information is carried in a field of a channel state information resource configuration, the channel state information resource configuration may be as follows:

wherein powerControlOffsetSS is an offset between the transmission power of SSB and the first transmission power of the first CSI-RS. The terminal device may determine the first transmit power of the first CSI-RS by the known SSB transmit power and the power offset.

In the above example, the network device carries the first information in other information and sends the first information together, so that signaling overhead can be saved.

It may be appreciated that the network device may indicate the first transmission power to the terminal device before the first CSI-RS is sent to the terminal device, or the network device may indicate the first transmission power to the terminal device after the first CSI-RS is sent to the terminal device, or the network device may send the first transmission power and the first CSI-RS to the terminal device at the same time, which is not limited in the embodiment of the present application.

For example, when the first information implicitly indicates the first transmit power of the first CSI-RS, optionally, the first information indicates a first antenna port number, which may be the number of antenna ports of the first CSI-RS at the first transmit power. The terminal device may determine the first transmit power according to the first port number.

Step 202: the network device sends the second information to the terminal device, and correspondingly, the terminal device receives the second information.

Wherein the second information is used to indicate a power offset of the first CSI-RS.

The power offset may be a difference between the first transmit power and the second transmit power of the first CSI-RS. The first transmission power may be understood as a previous transmission power, and the second transmission power may be understood as a transmission power after the antenna port is changed based on the first transmission power. Correspondingly, when the first information indicates the first antenna port number, the first antenna port number may be understood as the number of antenna ports before the number of antenna ports of the network device changes.

It should be understood that, in the above example, the first number of antenna ports is indicated to the terminal device by the network device through the first information, and the first number of antenna ports may also be indicated to the terminal device by the network device through information other than the first information, or the first number of antenna ports may also be preconfigured, which is not limited in the embodiment of the present application.

The above manner of indicating the power offset by the second information may be classified into implicit indication and display indication.

The implicit indication modes include the following two modes:

Implicit indication mode 1: the network device indicates, through the second information, a second antenna port number, which is a port number of the first CSI-RS at the second transmission power, in other words, the second antenna port number refers to an antenna port after the network device antenna port number changes. That is, the network device directly indicates the changed number of antenna ports to the terminal device.

Implicit indication mode 2: the network device indicates an antenna port number offset by the second information, the content of the second information including the antenna port number offset, the antenna port number offset being a difference between the first antenna port number and the second antenna port number. The antenna port number offset may be an absolute value or an actual value (realvalue). For example, the network device indicates to the terminal device that the antenna port number offset is 3, or the network device indicates to the terminal device that the antenna port number offset is-3. The antenna port number offset may be used for the terminal device to determine a second antenna port number, which may be used for the terminal device to determine a power offset. In a possible manner, when the antenna port number is biased to an absolute value, the network device should also indicate to the terminal device the magnitude relation of the first antenna port number and the second antenna port number. In another possible way, the network device and the terminal device may predefine a calculation rule: when the network device indicates to the terminal device that the antenna port offset is greater than 0, the terminal device defaults to a first antenna port number greater than a second antenna port number.

The network device can indicate the power bias to the terminal device through the antenna port number or the antenna port bias, so that the flexibility of the network device in indicating the power change is improved.

Displaying indication modes: the content of the second information includes a value of the power offset.

The power offset may be an absolute value or an actual value. In a possible way, the network device should also indicate to the terminal device the magnitude relation of the first transmit power and the second transmit power when the power offset is absolute. In another possible way, the network device and the terminal device may predefine a calculation rule: when the power offset indicated by the network device to the terminal device is greater than 0, the terminal device defaults to the first transmit power being greater than the second transmit power.

The network device directly indicates the power offset value to the terminal device, and the efficiency of the terminal device in determining the power offset is further improved.

Alternatively, the second information may be carried in a broadcast message, a multicast message, or cell-level information. Alternatively, the network device may indicate the power offset of the CSI-RS to the plurality of UEs through the second information. In one example, the second information is information scrambled by a group radio network temporary identifier (goup radio network temporary identidier, G-RNTI), and the network device biases the power of the CSI-RS indicated by each UE in the group of UEs in such a manner that the network device notifies the plurality of terminal devices of the power change information through one piece of the second information, thereby saving signaling overhead of the network device.

Step 203: and the terminal equipment determines the second transmission power of the first CSI-RS according to the first transmission power and the power offset.

It will be appreciated that the terminal device also needs to determine the second number of antenna ports before determining the second transmit power. The method for determining the second antenna port number by the terminal device is set forth below according to different situations of the second information.

Corresponding to the implicit indication mode 1 in step 202, when the content of the second information includes the second antenna port number, the terminal device directly determines the second antenna port number according to the second information without calculation. Illustratively, the second information indicates that the first antenna port number is 5, and the terminal device determines that the first antenna port number is 5.

Corresponding to the implicit indication mode 2 in step 202, the network device sends second information to the terminal device, where the second information indicates the offset of the number of antenna ports, and the cases are as follows:

case 1: when the offset of the antenna port number indicated by the network equipment to the terminal equipment is greater than 0, the terminal equipment defaults that the first antenna port number is greater than the second antenna port number. And when the antenna port offset received by the terminal equipment is larger than 0, subtracting the antenna port offset from the first antenna port number to obtain a second antenna port number. For example, when the number of antenna ports is offset to 3, and the network device indicates to the terminal device that the first number of antenna ports is 6, the terminal device may determine that the second number of antenna ports is 6-3=3 according to the number of antenna ports offset and the second number of antenna ports.

Case 2: when the number of antenna ports included in the second information is biased to be an absolute value, the network device further indicates the magnitude relation between the number of second antenna ports and the number of first antenna ports of the terminal device. For example, the network device indicates that the number of antenna ports is offset to 2, and indicates that the number of first antenna ports is greater than the number of second antenna ports, where the number of first antenna ports is 7, and the terminal device calculates the number of second antenna ports to be 7-2=5. As another example, the network device may instruct the terminal device that the antenna port offset is 2, the first number of antenna ports is 7, and instruct the second number of antenna ports to be greater than the first number of antenna ports, and then the terminal device calculates the second number of antenna ports to be 7+2=9.

Case 3: when the network device biases the antenna port number indicated to the terminal device to an actual value, the terminal device can directly determine the second antenna port number according to the second information and the first antenna port number. For example, the network device and the terminal device are predefined, and the terminal device may directly calculate according to the antenna port number offset to obtain the first antenna port number. For example, when the network device indicates to the terminal device that the antenna port bias is 3, the first number of antenna ports is 5, and the terminal device calculates the second number of antenna ports to be 5+3=8; when the network device indicates to the terminal device that the antenna port offset is-3, the first number of antenna ports is 5, and the terminal device calculates the second number of antenna ports to be 5+ (-3) =2.

It should be understood that the rule for the terminal device to calculate the second number of antenna ports may be preconfigured with the network device, and the terminal device calculates according to the preconfigured rule when receiving the second information.

After the terminal device determines the second antenna port number according to the above manner, the second transmit power may be further determined according to the following method:

the terminal device determines a ratio of the first antenna port number to the second antenna port number, and determines the second transmission power according to the first transmission power and the ratio of the first antenna port number to the second antenna port number. For example, if the terminal device determines that the first antenna port is 64, determines that the second antenna port number is 32 according to the second information, and determines that the ratio of the second line port number to the first antenna port number is 1/2, and the value of the first transmission power is 200, one method for determining the value of the second transmission power by the terminal device is as follows: 200 x 1/2=100. It should be appreciated that there is some error allowed in the value of the second transmit power, for example, the actual value of the second transmit power may be 100.5, etc. It should also be appreciated that the ratio of the second number of antenna ports to the first number of antenna ports may also be used as only one of a plurality of parameters for determining the second transmit power. The embodiment of the present application is not limited thereto.

Corresponding to the display indication manner in step 202, when the second information is used to indicate the power offset, the terminal device determines the second transmission power according to the power offset, which is, for example,

case a: when the power offset is the difference between the second transmission power and the first transmission power, the terminal device determines the second transmission power according to the first transmission power and the power offset, and the method of determining the number of the first antenna ports by the terminal device according to the number offset of the antenna ports in step 203 may be referred to, which is not described herein. For example, the first transmit power has a value of 200, the power offset is 50, and the first transmit power is greater than the second transmit power, then the second transmit power has a value of 150.

Optionally, when the network device indicates the power offset through the second information, the terminal device may reconfigure the transmission power of the first CSI-RS according to the power offset.

Taking the channel state information resource configuration in step 201 as an example, when the power offset is the difference offset0 between the first transmission power and the second transmission power, after the terminal device receives the power offset, the powercontrol offsetss may be modified, where the modified powercontrol offsetss is: original powercontroloffsetss+offset0.

Based on the descriptions of steps 201 to 203 above, in an alternative embodiment, the method may further comprise step 204: the terminal device determines a second reference signal received power.

The second reference signal receiving power is the reference signal receiving power of the first CSI-RS corresponding to the second transmitting power, in other words, after the number of ports of the transmitting antenna of the network device changes, the terminal device receives the receiving power of the first CSI-RS.

The terminal device may determine the second reference signal received power in two ways:

mode 1: and the terminal equipment determines the second reference signal receiving power RSRP according to the difference value between the second transmitting power and the first reference signal receiving power RSRP.

The first RSRP is the reference signal receiving power of the first CSI-RS corresponding to the first transmitting power, in other words, before the number of ports of the transmitting antenna of the network device changes, the terminal device receives the receiving power of the first CSI-RS.

The difference between the second transmission power and the first transmission power may be determined according to the second information in step 202, for example, the second information indicates a power offset, and when the power offset is the difference between the first transmission power and the second transmission power, the terminal device may directly determine the difference between the second transmission power and the first transmission power according to the second information; when the power offset is the difference between the reference value and the second transmission power, the terminal device may determine the difference between the second transmission power and the first transmission power according to the difference between the reference value and the second transmission power, and the first transmission power.

An example of determining the second reference signal received power by the terminal device is that the terminal device measures the first CSI-RS to obtain the first RSRP, and sums the difference between the first RSRP and the second transmission power and the first transmission power to obtain the second reference signal received power. For example, if the value of the first RSRP is 200, the difference between the second transmission power and the first transmission power is-30, the value of the second reference signal received power may be 200+ (-30) =170. Alternatively, if the difference between the second transmission power and the first transmission power is 30, the value of the second reference signal received power may be 200+30=230.

Mode 2: the terminal device may obtain the second reference signal received power according to the second CSI-RS.

The second CSI-RS may be a CSI-RS that the network device may indicate, for example, the network device sends DCI to the terminal device, where the DCI is used to indicate one CSI-RS, i.e. indicate measurement resources of one CSI-RS. It is understood that the DCI may be second information. That is, the second information is also used to indicate the second CSI-RS. It is to be appreciated that the second information also indicates measurement resources of the second CSI-RS. Alternatively, the resource Identities (IDs) of the second CSI-RS and the first CSI-RS may be different.

The second CSI-RS may also be the next CSI-RS adjacent to the first CSI-RS, where adjacent refers to the next CSI-RS adjacent to the first CSI-RS in case the network device configures the terminal device with periodically transmitted CSI-RS or activated semi-static CSI-RS. For example, the network device transmits the CSI-RS in the next cycle of the cycle of transmitting the first CSI-RS. It should be appreciated that in this case, the first CSI-RS and the second CSI-RS may be configured identically, such as a measurement resource ID, a time domain location and a frequency domain location of a measurement resource, etc., except for being located at different time units and different transmission powers.

The terminal device obtains the second reference signal receiving power according to the second CSI-RS, which may be that the terminal device measures the reference signal on the resource of the second CSI-RS, thereby obtaining the second reference signal receiving power.

Optionally, after determining the second reference signal received power, the terminal device may determine the path loss according to the second reference signal. The terminal device determines the path loss by using the second reference signal received power and the second transmission power. For example, if the value of the second reference signal received power is 8 and the value of the second transmission power is 10, the path loss=second transmission power-second reference signal received power=10-8=2.

The above path loss can be used in several ways:

aspect one: and the terminal equipment determines the transmission power of the uplink information according to the path loss, and can transmit the PUCCH and/or the PUSCH through the transmission power.

Aspect two: and the terminal equipment determines the power margin according to the path loss. For example, after determining the power of the uplink information to be sent by the terminal device according to the path loss, determining the power headroom according to the maximum sending power of the terminal device and the power of the uplink information to be sent by the terminal device. For example, the terminal device may determine that the power used when transmitting the uplink information is 8, and assuming that the maximum transmission power of the terminal device is 10, the terminal device may determine that the power headroom is 10-8=2.

The terminal device may report the power headroom determined according to the path loss to the network device. One possible implementation, the power headroom may be carried in the uplink information.

In an alternative embodiment, the method may further comprise step 205: the terminal device updates the beam measurement results and reselects the beam.

The first CSI-RS may be a CSI-RS transmitted by the network device through the first beam. The first beam is one of at least one beam used by the network device for communication. The N beams may correspond to the N CSI-RSs one to one. That is, the network device may transmit multiple CSI-RSs to the terminal device, with different CSI-RSs located on different beams. These CSI-RSs may be distinguished by different resource IDs. The network device and the terminal device can use these CSI-RSs to make beam measurements and selections.

The terminal device updates the beam measurement result in the following manner:

mode a: the terminal device re-performs beam measurement and selection.

For example, the terminal device may acquire a third RSRP, where the third RSRP is a reference signal received power corresponding to the changed number of antenna ports. Beam #a is one of a plurality of beams, e.g., beam #a is used for transmitting the third CSI-RS, beam #b is used for transmitting the fourth CSI-RS, beam #c is used for transmitting the fifth CSI-RS, and so on. And the terminal equipment selects a beam used for information transmission from the at least one beam, wherein the reference received power corresponding to the reselected beam is the maximum reference signal received power in the reference signal received power corresponding to the at least one beam. For example, the terminal device obtains, through channel measurement, that the reference signal receiving power of beam #a for transmitting the third CSI-RS is 10, that of beam #b for transmitting the fourth CSI-RS is 9, and that of beam #c for transmitting the fifth CSI-RS is 13, so that the terminal device may select beam #c to transmit or receive the information to be transmitted, that is, beam #c is a beam reselected by the terminal device for information transmission.

The time when the terminal device performs channel measurement on the at least one beam may be indicated by the network device, or may be determined according to a measurement period preconfigured by the network device for the terminal device. Specific ways may refer to the description related to the way 2 in the step 203, and will not be described herein.

Mode B: and the terminal equipment re-performs beam selection according to the determined second reference signal receiving power.

For example, the terminal device determines the reference signal received powers of the plurality of beams before receiving the second information. After receiving the second information, a second reference signal reception power is determined according to mode 1 in step 203, and a beam is selected according to the second reference signal reception power and the reference signal reception power of the beam other than the beam corresponding to the second reference signal reception power determined previously. Specifically, the terminal device determines that the reference signal received power of the beam #1 is 6, the first RSRP of the beam #2 is 8, the reference signal received power of the beam #3 is 5, and after receiving the second information, calculates the second reference signal received power of the beam #2 by power offset to be 4, so that the beam #1 can be selected to transmit or receive the information to be transmitted.

It is to be understood that the above-described values are by way of example only and not limitation.

In an alternative embodiment, the method may further comprise step 206: the terminal device may also trigger a beam failure recovery procedure before reselecting the beam. For example, the terminal device may trigger a beam failure recovery procedure according to the second information. For example, the network device and the terminal device are predefined, and when the terminal device receives the second information, or when the network device sends the second information, the beam failure recovery procedure can be triggered. The application is not limited in this regard.

Alternatively, the terminal device may perform the methods of steps 201 to 203 when the power offset is greater than or equal to the first threshold, or the difference between the first path loss and the second path loss is greater than or equal to the first threshold. The first path loss is the path loss determined by the terminal equipment before the number of the antenna ports changes, and the second path loss is the path loss determined by the terminal equipment after the number of the antenna ports changes. The first threshold may be indicated to the terminal device by the network device, e.g., the network device indicates to the terminal device that the threshold is 2db through RRC signaling, etc. The threshold may also be predefined by the network device and the terminal device, which the present application is not limited to. For example, the network device and the terminal device predefine the threshold to be 5, and when the power offset is 7 and above the threshold, the terminal device may perform the method of steps 201-203.

The embodiment of the present application proposes another communication method, in which a power offset indicated by a network device to a terminal device is a difference between a reference value and a second transmission power, as shown in fig. 3, the method may include the following steps:

Step 301: the network device sends first information to the terminal device, and correspondingly, the terminal device receives the first information.

Step 301 may refer to the description of step 201, and will not be described herein.

Step 302: the network device sends the second information to the terminal device, and correspondingly, the terminal device receives the second information.

The second information is used to indicate a power offset of the first CSI-RS. The power offset may be a difference between the reference value and the second transmission power of the first CSI-RS. The reference value may be predefined. The reference value may also be a transmission power of the SSB indicated by the network device to the terminal device, for example.

Step 303: and the terminal equipment determines the second transmitting power of the first CSI-RS according to the reference value and the power offset.

As an example, if the reference value is a predefined value, the power offset is 60, the first transmission power is 200, the reference value is 140, and the second transmission power is less than the reference value, the terminal device may determine that the second transmission power is 140-60=80. Specifically, reference may be made to the method for determining the first antenna port number by the terminal device according to the antenna port number offset in step 203, which is not described herein.

As another example, when the reference value is SSB transmission power, for example, 50, and the power offset is-10, the terminal device may determine that the second transmission power is 50+ (-10) =40. It should be understood that the power offset may be an absolute value, may be an actual value, and the specific indication manner and the determining method of the terminal device may refer to the description related to the case a in step 203, which is not described herein. Optionally, when the network device indicates the power offset through the second information, the terminal device may reconfigure the transmission power of the first CSI-RS according to the power offset. Taking the channel state information resource configuration in step 201 as an example, when the power offset is the difference value of the reference value and the second transmission power, and if the reference value is the transmission power of the SSB signal, the terminal device may modify powercontrol offsetss to be offset1 after receiving the power offset.

Alternatively, the terminal device may perform the methods of steps 301 to 303 when the power offset is greater than or equal to the first threshold, or the difference between the first path loss and the second path loss is greater than or equal to the first threshold. In particular, reference may be made to the relevant description of the method shown in fig. 2.

In the method, the terminal equipment can determine the second transmitting power according to the reference value and the power offset, so that the flexibility of the terminal equipment in determining the second transmitting power is improved.

It should be appreciated that in possible embodiments, the method may also incorporate at least one of step 204, step 205, or step 206.

The embodiment of the application provides a communication method, which takes RRC signaling as an example of first information, DCI as an example of second information, gNB as an example of network equipment and UE as an example of terminal equipment, and as shown in fig. 4, the method can comprise the following steps:

in step 501, the gNB sends RRC signaling to the UE, and correspondingly, the UE receives the RRC signaling.

The RRC signaling is used to indicate a first transmit power of the first CSI-RS. The RRC signaling is also used to configure the period of transmitting CSI-RS and the first number of antenna ports. Specifically, reference may be made to the relevant description of step 201, which is not repeated here. The RRC signaling is also used to indicate that the first threshold is 3db.

Step 502: the gNB transmits the CSI-RS#A to the UE, and correspondingly, the UE receives the CSI-RS#A.

The CSI-rs#a is one example of a first CSI-RS. For a specific explanation, reference may be made to the description related to the first CSI-RS in step 201.

Step 503: the UE determines RSRP#A from the CSI-RS#A.

The rsrp#a is one example of the first RSRP. For a specific explanation reference may be made to the description related to the first RSRP in step 203.

Step 504: the gNB transmits DCI1 to the UE, and correspondingly, the UE receives the DCI1.

The DCI1 includes an actual value of the power offset. It should be understood that DCI1 includes an actual value of the power offset as only one example of the second information indicating the power offset. Specifically, reference may be made to the description of step 202, which is not repeated here.

Step 505: the UE determines a second transmit power based on the first transmit power and the power offset.

The UE determines the second transmission power according to the first transmission power and the power offset, which may refer to the description related to the case a in step 203.

Step 506: the gNB transmits the CSI-RS#B to the UE, and correspondingly, the UE receives the CSI-RS#B.

The CSI-rs#b is one example of a second CSI-RS. The CSI-rs#b is the next CSI-RS adjacent to the CSI-rs#a. For a specific explanation, reference may be made to the description of the second CSI-RS in step 203.

Step 507: the UE determines RSRP#B from the CSI-RS#B.

The UE may perform channel measurement according to the CSI-rs#b to obtain rsrp#b.

Step 508: the UE sends a physical random access channel (physical random access channel, PRACH) to the gNB, which the gNB receives accordingly.

The UE may send PRACH to the gNB according to DCI 1. For example, DCI1 itself may be predefined by the gNB and the UE as a condition for triggering the PRACH, and once the UE receives DCI1, the PRACH is sent to the gNB to trigger the beam failure recovery procedure.

Step 509: the UE selects a beam #a from among the plurality of beams according to the size relationship of RSRP.

The RSRP of the beams other than the beam corresponding to rsrp#b in the plurality of beams may be acquired by the UE through re-measurement, or may be determined in synchronization with rsrp#a in step 503, which is not limited by the embodiment of the present application. Beam #a may be a beam corresponding to the maximum RSRP among the plurality of beams. Specifically, reference may be made to the description of aspects a and B in step 203.

Step 310: the UE transmits data to the gNB on beam #a, and correspondingly, the gNB receives the data.

It should be appreciated that resources for the UE to transmit data are gNB scheduled, e.g., the gNB indicates time-frequency resources for transmitting data through DCI1 in step 504. It should be understood that the data is only one example of uplink information and is not limiting.

In the method, gNB indicates power change to UE in time, UE determines the transmission power of the changed CSI-RS, further determines the changed RSRP, improves the accuracy of channel measurement, and the UE reselects wave beams to receive data, thereby improving the communication quality.

The embodiment of the application provides a communication method, which takes RRC signaling as an example of first information, DCI as an example of second information, gNB as an example of network equipment and UE as an example of terminal equipment, and as shown in fig. 5, the method can comprise the following steps:

The RRC signaling is used to indicate a first transmit power of the first CSI-RS. The RRC signaling is also used to configure the period of transmitting CSI-RS and the first number of antenna ports. Specifically, reference may be made to the relevant description of step 201, which is not repeated here.

Step 502: the gNB transmits the CSI-RS#C to the UE, and correspondingly, the UE receives the CSI-RS#C.

The CSI-rs#c is one example of a first CSI-RS. For a specific explanation, reference may be made to the description related to the first CSI-RS in step 201.

Step 503: the UE determines RSRP#C from the CSI-RS#C.

The rsrp#c is one example of the first RSRP. For a specific explanation reference may be made to the description related to the first RSRP in step 203.

Step 504: the gNB transmits DCI2 to the UE, and correspondingly, the UE receives the DCI2.

The DCI2 includes a second antenna port number. It should be understood that DCI2 includes the second antenna port number as only one example of the second information indicating the power offset. The RNTI of the DCI2 is a group RNTI. Specifically, reference may be made to the description of step 202, which is not repeated here.

Step 505: and the UE determines the second transmitting power according to the first transmitting power and the ratio of the first antenna port to the second antenna port.

The UE determines the second transmit power according to the first transmit power and the ratio of the first antenna port to the second antenna port, and may refer to the description related to the implicit indication mode 1 in step 203.

Step 506: the gNB transmits the CSI-RS#D to the UE, and correspondingly, the UE receives the CSI-RS#D.

The CSI-rs#d is one example of a second CSI-RS. The CSI-rs#d is a CSI-RS indicated by the gNB for the UE. The transmission timing of the CSI-rs#d may be after the CSI-rs#c and before the CSI-RS transmission of the next cycle. The CSI-rs#d may be indicated by DCI2 in step 504. For a specific explanation, reference may be made to the description of the second CSI-RS in step 203.

Step 507: and the UE determines the path loss according to the second transmitting power and the CSI-RS#D.

Specifically, the UE may refer to the description related to step 203 for determining the path loss.

Step 508: the UE determines a power headroom.

Step 509: the UE transmits a power headroom to the gNB, which is correspondingly received by the gNB.

The power headroom may be carried in the uplink channel. The resources of the UE transmit power headroom are gNB scheduled, e.g., the gNB indicates the time-frequency resources for transmitting uplink information through DCI2 in step 504.

In the method, gNB indicates power change to UE in time, UE determines the transmission power of the CSI-RS after the change, further determines the changed path loss, reports the path loss to gNB, improves the accuracy of channel measurement, and the two communication parties align the measurement results in time to improve the communication quality.

It will be appreciated that, in order to implement the functions in the above embodiments, the network device and the terminal device include corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

Fig. 6 and fig. 7 are schematic structural diagrams of a possible communication device according to an embodiment of the present application. These communication devices may be used to implement the functions of the terminal device or the network device in the above method embodiments, so that the beneficial effects of the above method embodiments may also be implemented. In the embodiment of the present application, the communication device may be one of the terminals 120a to 120j shown in fig. 1, or may be the base station 110a or 110b shown in fig. 1, or may be a module (such as a chip) applied to a terminal device or a network device.

As shown in fig. 6, the communication apparatus 600 includes a processing unit 610 and a transceiving unit 620. The communication device 600 is configured to implement the functions of the terminal device or the network device in the embodiments of the methods shown in fig. 2 to 4 described above.

When the communication apparatus 600 is used to implement the functionality of the terminal device in the method embodiment shown in fig. 2: the transceiver unit 620 is configured to receive the first information and the second information; the processing unit 610 is configured to determine a second transmission power; the transceiver unit 620 may also be configured to transmit uplink information, such as a power headroom.

When the communication apparatus 600 is used to implement the functionality of the network device in the method embodiment shown in fig. 2: the transceiver 620 is configured to transmit the first information and the second information; the transceiver unit 620 is further configured to receive a power headroom.

The above-mentioned more detailed descriptions of the processing unit 610 and the transceiver unit 620 may be directly obtained by referring to the related descriptions in the method embodiments shown in fig. 2 to fig. 4, which are not repeated herein.

As shown in fig. 7, the communication device 700 includes a processor 710 and an interface circuit 720. Processor 710 and interface circuit 720 are coupled to each other. It is understood that the interface circuit 720 may be a transceiver or an input-output interface. Optionally, the communication device 700 may further comprise a memory 740 for storing instructions to be executed by the processor 710 or for storing input data required by the processor 710 to execute instructions or for storing data generated after the processor 710 executes instructions.

When the communication device 700 is used to implement the methods shown in fig. 2 to 5, the processor 710 is configured to implement the functions of the processing unit 610, and the interface circuit 720 is configured to implement the functions of the transceiver unit 620.

When the communication device is a chip applied to the terminal, the terminal chip realizes the functions of the terminal in the embodiment of the method. The terminal chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal, and the information is sent to the terminal by the base station; alternatively, the terminal chip sends information to other modules in the terminal (e.g., radio frequency modules or antennas) that the terminal sends to the base station.

When the communication device is a module applied to a base station, the base station module realizes the functions of the base station in the method embodiment. The base station module receives information from other modules (such as radio frequency modules or antennas) in the base station, the information being transmitted by the terminal to the base station; alternatively, the base station module transmits information to other modules in the base station (e.g., radio frequency modules or antennas) that the base station transmits to the terminal. The base station module may be a baseband chip of a base station, or may be a DU or other module, where the DU may be a DU under an open radio access network (open radio access network, O-RAN) architecture.

It is to be appreciated that the processor in embodiments of the application may be a central processing unit (Central Processing Unit, CPU), other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, transistor logic device, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The method steps of the embodiments of the present application may be implemented in hardware or in software instructions executable by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. The storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a base station or terminal. The processor and the storage medium may reside as discrete components in a base station or terminal.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; but also optical media such as digital video discs; but also semiconductor media such as solid state disks. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage medium.

In various embodiments of the application, where no special description or logic conflict exists, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments based on their inherent logic.

Depending on whether the specification applies to the alternatives: in the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present application, the character "/", generally indicates that the associated objects are an or relationship; in the formula of the present application, the character "/" indicates that the front and rear associated objects are a "division" relationship. "including at least one of A, B and C" may mean: comprises A; comprises B; comprising C; comprises A and B; comprises A and C; comprises B and C; including A, B and C.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence number of each process does not mean the sequence of the execution sequence, and the execution sequence of each process should be determined according to the function and the internal logic.

Claims

1. A method of communication, comprising:

receiving first information, wherein the first information is used for configuring first transmission power of a first channel state information reference signal (CSI-RS);

receiving second information, wherein the second information is used for indicating the power offset of the first CSI-RS;

and determining the second transmission power of the first CSI-RS according to the first transmission power and the power offset.

2. The method of claim 1, wherein the second information is used to indicate the power offset, comprising:

the second information is a difference between the first transmission power and the second transmission power.

3. The method of claim 1, wherein the second information indicating the power offset comprises the second indication information being a second number of antenna ports, the second number of antenna ports being a number of ports of the first CSI-RS at a second transmit power,

the method further comprises the steps of:

and determining the power offset of the first CSI-RS according to the second antenna port number and the first antenna port number, wherein the first antenna port number is the antenna port number of the first CSI-RS under the first transmitting power.

4. The method of claim 1, wherein the second information is used to indicate the power offset, comprising: the second information is an antenna port number offset, the antenna port number offset is a difference between a first antenna port number and a second antenna port number, the first antenna port number is the antenna port number of the first CSI-RS under a first transmitting power, the second antenna port number is the port number of the first CSI-RS under a second transmitting power,

the determining the second transmission power according to the first transmission power and the power bias includes:

and determining the second transmitting power according to the first transmitting power and the ratio of the first antenna port number to the second antenna port number.

5. The method according to any one of claims 1 to 4, further comprising:

determining a first reference signal received power, RSRP, of the first CSI-RS at the first transmit power;

and determining second reference signal receiving power of the first CSI-RS corresponding to the second transmitting power according to the power bias and the first RSRP.

6. The method according to any one of claims 1 to 4, further comprising:

And determining second reference signal receiving power corresponding to the second transmitting power according to a second CSI-RS, wherein the second CSI-RS is the next CSI-RS adjacent to the first CSI-RS or the second CSI-RS is the CSI-RS indicated by the second information.

7. The method of claim 6, wherein prior to the determining a second reference signal received power corresponding to the second transmit power from the second CSI-RS, the method further comprises:

and sending a physical random access channel according to the second information, wherein the physical random access channel is used for triggering a beam failure recovery flow.

8. The method according to any one of claims 5 to 7, further comprising:

and determining the second path loss according to the second reference signal receiving power and the second transmitting power.

9. The method of claim 8, wherein the method further comprises:

and determining a third transmitting power for transmitting the uplink channel according to the second path loss.

10. The method according to claim 8 or 9, characterized in that the method further comprises:

determining a power margin according to the second path loss;

And reporting the power margin.

11. The method of any of claims 1 to 10, wherein the power bias is greater than or equal to a first threshold.

12. The method according to any one of claims 1 to 11, wherein the second information is downlink control information.

13. The method of claim 12, wherein the second information is scrambled by a group radio network temporary identity, G-RNTI.

14. A communication method, characterized in that,

transmitting first information, wherein the first information is used for configuring first transmission power of a first channel state information reference signal (CSI-RS);

and transmitting second information, wherein the second information is used for indicating the power offset of the first CSI-RS.

15. The method of claim 14, wherein the second information is used to indicate the power bias, comprising:

16. The method of claim 14, wherein the second information is used to indicate the power bias, comprising:

the second indication information is a second antenna port number, and the second antenna port number is the port number of the first CSI-RS under the second sending power.

17. The method of claim 14, wherein the second information is used to indicate the power bias, comprising:

the second information is offset of antenna port number, the offset of the antenna port number is a difference value between a first antenna port number and a second antenna port number, the first antenna port number is the antenna port number of the first CSI-RS under the first transmitting power, and the second antenna port number is the port number of the first CSI-RS under the second transmitting power.

18. The method according to any one of claims 14 to 17, further comprising:

and receiving a physical random access channel, wherein the physical random access channel is used for triggering a beam failure recovery flow.

19. The method of any one of claims 14 to 18, further comprising:

and receiving a power margin, wherein the power margin is determined according to a second path loss, and the path loss is determined according to the second reference signal receiving power and the second transmitting power.

20. The method of any of claims 14 to 19, wherein the power bias is greater than or equal to a first threshold.

21. The method according to any one of claims 14 to 20, wherein the second information is downlink control information.

22. The method of claim 21, wherein the method further comprises:

scrambling the second information by means of a group radio network temporary identity G-RNTI.

23. A communication device comprising a processor and interface circuitry for receiving signals from other communication devices than the communication device and transmitting signals from the processor to the processor or sending signals from the processor to other communication devices than the communication device, the processor via logic circuitry or executing code instructions for implementing the modules of the method of any one of claims 1 to 13.

24. A communication device comprising a processor and interface circuitry for receiving signals from other communication devices than the communication device and transmitting signals from the processor to or sending signals from the processor to other communication devices than the communication device, the processor being configured to implement, by logic circuitry or executing code instructions, or modules of the method of any of claims 14 to 22.

25. A computer readable storage medium having stored therein instructions which, when executed by a communication device, implement the method of any one of claims 1 to 13 or the method of any one of claims 14 to 22.

26. A communication system comprising a communication device according to claim 23 and a communication device according to claim 24.