CN117545072A

CN117545072A - Method and communication device for calculating uplink transmission power

Info

Publication number: CN117545072A
Application number: CN202210904724.3A
Authority: CN
Inventors: 王中振; 王妮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2024-02-09
Also published as: WO2024021741A1

Abstract

The application provides a method and a communication device for calculating uplink transmission power, which can improve the accuracy of the uplink transmission power and the performance of a communication system. The method is applied to the terminal equipment and comprises the following steps: acquiring a transmission power compensation quantity of an uplink signal, wherein the transmission power compensation quantity comprises an uplink and downlink frequency difference compensation quantity and/or an uplink and downlink antenna gain difference compensation quantity; and determining the actual transmission power of the uplink signal according to the transmission power compensation amount.

Description

Method and communication device for calculating uplink transmission power

Technical Field

The present application relates to the field of communications, and more particularly, to a method and a communication apparatus for calculating uplink transmission power.

Background

Non-terrestrial networks (non-terrestrial network, NTN), i.e. non-terrestrial communication systems including satellite communication networks, commonly employ frequency division duplex (frequency division duplex, FDD) communication schemes. Because the bandwidth of the NTN system is generally larger and the frequency spectrum is relatively scattered, the interval between the uplink and downlink frequency spectrums is generally larger. In the propagation process of a wireless channel, the intensity of electromagnetic waves is affected by path loss, shadow fading and the like, and the intensity of signals of a transmitting end is reduced when the signals reach a receiving end, so that the transmitting end needs to be controlled to compensate the influence caused by the path loss, shadow fading and the like. At present, the downlink path loss measured by the terminal is commonly used for channel quality evaluation and is used as the basis of uplink transmission power. However, in the NTN system, the difference between the uplink and downlink frequency points is large, and the equivalent uplink path loss by using the downlink path loss may cause the power received by the receiving side to be not expected, and the uplink power may be affected by other factors. Therefore, how to determine the uplink transmit power is a problem to be solved.

Disclosure of Invention

The application provides a method and a communication device for calculating uplink transmission power, which can improve the accuracy of the uplink transmission power and the performance of a communication system.

In a first aspect, a method for calculating uplink transmission power is provided, where the method is applied to a terminal device, and includes: acquiring a transmission power compensation quantity of an uplink signal, wherein the transmission power compensation quantity comprises an uplink and downlink frequency difference compensation quantity and/or an uplink and downlink antenna gain difference compensation quantity; and determining the actual transmission power of the uplink signal according to the transmission power compensation amount.

The actual transmission power of the uplink signal is determined according to the transmission power compensation quantity comprising the uplink and downlink frequency difference compensation quantity and/or the uplink and downlink antenna gain difference compensation quantity, and the influence of the uplink and downlink frequency difference compensation quantity and/or the uplink and downlink antenna gain difference compensation quantity is considered when determining the actual transmission power of the uplink signal, so that the accuracy of the uplink transmission power is improved, and the performance of a communication system is improved.

With reference to the first aspect, in one possible implementation manner of the first aspect, the uplink and downlink antenna gain difference compensation amounts include an uplink and downlink antenna gain difference compensation amount of the access network device and an uplink and downlink antenna gain difference compensation amount of the terminal device; the determining the actual transmission power of the uplink signal according to the transmission power compensation amount includes: and determining the actual transmitting power of the uplink signal according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

The uplink and downlink antenna gain difference compensation quantity comprises an uplink and downlink antenna gain difference compensation quantity of the access network equipment and an uplink and downlink antenna gain difference compensation quantity of the terminal equipment, and the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment are respectively considered, so that the accuracy of uplink transmission power can be further improved, and the performance of a communication system is improved.

With reference to the first aspect, in a possible implementation manner of the first aspect, the obtaining a transmission power compensation amount of the uplink signal includes: determining the uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency; and determining the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment.

With reference to the first aspect, in a possible implementation manner of the first aspect, the determining the uplink-downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency includes: the uplink-downlink frequency difference compensation amount is calculated according to the formula (1):

wherein, UL frequency is the uplink communication frequency, DL frequency is the downlink communication frequency;

the determining the compensation amount of the uplink and downlink antenna gain difference of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment comprises the following steps:

Determining the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the formula (2):

the UE DL Ant num is the number of downlink antenna elements of the terminal device, and the UE UL Ant num is the number of uplink antenna elements of the terminal device.

With reference to the first aspect, in a possible implementation manner of the first aspect, the acquiring a transmission power compensation amount of the uplink signal further includes:

determining the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment; or,

and receiving the uplink and downlink antenna gain difference compensation quantity of the access network equipment, which is sent by the access network equipment.

The terminal equipment can determine the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment, or the terminal equipment can also receive the uplink and downlink antenna gain difference compensation quantity of the access network equipment sent by the access network equipment, so that the uplink and downlink antenna gain difference compensation quantity of the access network equipment can be flexibly obtained.

With reference to the first aspect, in a possible implementation manner of the first aspect, the determining, according to a downlink antenna gain and an uplink antenna gain of the access network device, an uplink-downlink antenna gain difference compensation amount of the access network device includes:

Calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment according to the formula (3):

wherein gNB DL Ant num is the number of downlink antenna elements of the access network device, and gNB UL Ant num is the number of uplink antenna elements of the access network device.

With reference to the first aspect, in a possible implementation manner of the first aspect, the transmission power compensation amount includes a gain difference compensation amount of an uplink antenna and a downlink antenna of the terminal device; acquiring the expected receiving power of the access network equipment for the uplink signal;

the determining the actual transmission power of the uplink signal according to the transmission power compensation amount includes: and determining the actual transmission power of the uplink signal according to the transmission power compensation amount and the expected reception power of the uplink signal, wherein the expected reception power of the uplink signal comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network device.

With reference to the first aspect, in a possible implementation manner of the first aspect, the obtaining a transmission power compensation amount of the uplink signal includes:

calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the terminal equipment according to the formula (4):

The terminal equipment is only used for calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the terminal equipment, so that the calculation quantity of the terminal equipment can be reduced, and the system resources are saved.

With reference to the first aspect, in a possible implementation manner of the first aspect, the method further includes: a reception level value for initial camping cell selection is determined based on the amount of transmission power compensation for the uplink signal.

According to the transmission power compensation quantity of the uplink signal, the receiving level value for the initial residence cell selection is determined, so that the accuracy of the initial residence cell selection of the terminal equipment can be improved.

With reference to the first aspect, in one possible implementation manner of the first aspect, the transmission power compensation amount of the uplink signal includes an uplink-downlink frequency difference compensation amount, an uplink-downlink antenna gain difference compensation amount of the access network device, and an uplink-downlink antenna gain difference compensation amount of the terminal device; the determining the reception level value of the cell selection according to the transmission power compensation amount includes: and determining the horizontal receiving value of the determined cell selection according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

With reference to the first aspect, in a possible implementation manner of the first aspect, the transmission power compensation amount of the uplink signal includes a gain difference compensation amount of an uplink antenna and a downlink antenna of the terminal device; the determining the cell selection reception level value according to the transmission power compensation amount includes: and determining the cell selection receiving level value according to the transmitting power compensation quantity and the preset receiving power, wherein the preset receiving power is the receiving power in a cell set by the access network equipment and comprises an uplink and downlink frequency difference compensation quantity and an uplink and downlink antenna gain difference compensation quantity of the access network equipment.

In a second aspect, a method for calculating uplink transmission power is provided, where the method is applied to an access network device, and includes: acquiring the gain difference compensation quantity of uplink and downlink antennas of access network equipment; and sending the uplink and downlink antenna gain difference compensation quantity of the access network equipment to the terminal equipment, so that the terminal equipment can determine uplink sending power according to the uplink and downlink antenna gain difference compensation quantity of the access network equipment.

With reference to the second aspect, in one possible implementation manner of the second aspect, the obtaining an uplink and downlink antenna gain difference compensation amount of the access network device includes: and determining the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment.

With reference to the second aspect, in a possible implementation manner of the second aspect, the determining, according to a downlink antenna gain and an uplink antenna gain of the access network device, an uplink-downlink antenna gain difference compensation amount of the access network device includes: calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment according to the formula (5):

With reference to the second aspect, in a possible implementation manner of the second aspect, the method further includes: and transmitting the expected received power of the uplink signal to the terminal equipment, wherein the expected received power of the uplink signal comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

With reference to the second aspect, in a possible implementation manner of the second aspect, the method further includes: and transmitting preset receiving power to the terminal equipment, wherein the preset receiving power is the receiving power in a cell set by the access network equipment, and comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

With reference to the second aspect, in a possible implementation manner of the second aspect, the method further includes:

and determining the uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency.

In a third aspect, there is provided a terminal device comprising: a processing unit, configured to obtain a transmission power compensation amount of an uplink signal, where the transmission power compensation amount includes an uplink-downlink frequency difference compensation amount and/or an uplink-downlink antenna gain difference compensation amount; the processing unit is further configured to determine an actual transmission power of the uplink signal according to the transmission power compensation amount.

With reference to the third aspect, in a possible implementation manner of the third aspect, the uplink and downlink antenna gain difference compensation amounts include an uplink and downlink antenna gain difference compensation amount of the access network device and an uplink and downlink antenna gain difference compensation amount of the terminal device; the processing unit is specifically used for: and determining the actual transmitting power of the uplink signal according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

With reference to the third aspect, in a possible implementation manner of the third aspect, the processing unit is specifically configured to: determining the uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency; and determining the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment.

With reference to the third aspect, in a possible implementation manner of the third aspect, the processing unit is specifically configured to: the uplink and downlink frequency difference compensation amount is calculated according to the formula (6):

the processing unit is specifically used for:

determining the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the formula (7):

With reference to the third aspect, in a possible implementation manner of the third aspect, the processing unit is specifically configured to:

determining the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment; or the terminal equipment comprises a receiving and transmitting unit, which is used for receiving the uplink and downlink antenna gain difference compensation quantity of the access network equipment, which is sent by the access network equipment.

With reference to the third aspect, in a possible implementation manner of the third aspect, the processing unit is specifically configured to: calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment according to the formula (8):

With reference to the third aspect, in a possible implementation manner of the third aspect, the transmission power compensation amount includes a gain difference compensation amount of an uplink antenna and a downlink antenna of the terminal device; the processing unit is further configured to obtain a receiving power expected by the access network device for the uplink signal; the processing unit is specifically used for: and determining the actual transmission power of the uplink signal according to the transmission power compensation amount and the expected reception power of the uplink signal, wherein the expected reception power of the uplink signal comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network device.

calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the terminal equipment according to the formula (9):

With reference to the third aspect, in a possible implementation manner of the third aspect, the processing unit is further configured to: a reception level value for initial camping cell selection is determined based on the amount of transmission power compensation for the uplink signal.

With reference to the third aspect, in one possible implementation manner of the third aspect, the transmission power compensation amount of the uplink signal includes an uplink-downlink frequency difference compensation amount, an uplink-downlink antenna gain difference compensation amount of the access network device, and an uplink-downlink antenna gain difference compensation amount of the terminal device; the processing unit is specifically used for: and determining the horizontal receiving value of the determined cell selection according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

With reference to the third aspect, in a possible implementation manner of the third aspect, the transmission power compensation amount of the uplink signal includes a gain difference compensation amount of an uplink antenna and a downlink antenna of the terminal device; the processing unit is specifically used for: and determining the actual sending power of the uplink signal according to the sending power compensation amount and the preset receiving power, wherein the preset receiving power is the receiving power in a cell set by the access network equipment, and comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

In a fourth aspect, an access network device is provided, including: the processing unit is used for acquiring the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment; and the receiving and transmitting unit is used for transmitting the uplink and downlink antenna gain difference compensation quantity of the access network equipment to the terminal equipment so as to be used for determining uplink transmission power by the terminal equipment according to the uplink and downlink antenna gain difference compensation quantity of the access network equipment.

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the processing unit is specifically configured to:

and determining the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment.

calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment according to the formula (10):

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the access network device further includes: and transmitting the expected received power of the uplink signal to the terminal equipment, wherein the expected received power of the uplink signal comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the transceiver unit is further configured to: and transmitting preset receiving power to the terminal equipment, wherein the preset receiving power is the receiving power in a cell set by the access network equipment, and comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the processing unit is further configured to: and determining the uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any possible implementation of the first aspect, or to perform the method of the second aspect or any possible implementation of the second aspect.

In a sixth aspect, a computer readable storage medium is provided, in which a computer program is stored which, when executed by a computer, implements the method of the first aspect or any possible implementation of the first aspect, or implements the method of the second aspect or any possible implementation of the second aspect.

Alternatively, the computer executing the computer program may be a terminal device or an access network device as described above.

In a seventh aspect, a system on a chip is provided, the system on a chip comprising a processor for executing a computer program for performing the functions involved in the above aspects, e.g. generating, receiving, transmitting, or processing data and/or information involved in the above methods. In one possible design, the system-on-chip further includes a memory to hold a computer program. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In an eighth aspect, a communication system is provided, which comprises a terminal device with functions implementing the methods and various possible designs of the first aspect and an access network device with functions implementing the methods and various possible designs of the second aspect.

Drawings

Fig. 1 shows a schematic diagram of a communication system of the present application;

FIG. 2 is a schematic diagram of free space path loss for different communication distances;

FIG. 3 is a schematic flow chart of a method of calculating uplink transmit power of the present application;

fig. 4 shows a schematic block diagram of a communication device of an embodiment of the present application;

fig. 5 shows a schematic block diagram of a communication device of an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal device provided in the present application;

fig. 7 is a schematic structural diagram of a terminal device provided in the present application.

Detailed Description

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

The technical solution of the embodiment of the present application may be applied to various cellular communication systems, for example: the 4G system (or called long term evolution (long term evolution, LTE) system) and the fifth generation (5th generation,5G) system (or called New Radio (NR)) may be further applicable to use of a subsequent evolution system, such as a sixth generation 6G communication system, an even higher generation 7G communication system, and the like, and the technical solutions in the embodiments of the present application may apply NTN technology to these cellular communication systems to form an NTN system.

The access network device in the embodiments of the present application may be a device for communicating with a terminal device, may be a base station, or an access point, or a transmission receiving point (transmission reception point, TRP), or may refer to a device in an access network that communicates with a wireless terminal device over an air interface through one or more sectors. For example, the access network device may be an evolved NodeB (eNB or eNodeB) in the LTE system, or the access network device may be a relay station, an in-vehicle device, an access device in a 5G network, or a network device in a public land mobile network (public land mobile network, PLMN) network for future evolution, or the like, and the access network device may also be an Access Point (AP) in a WLAN, or may be a gNB in a new radio system (NR) system, which embodiments of the present application are not limited.

In another scenario, the base station may be further divided into a Centralized Unit (CU) and a Distributed Unit (DU), and under one CU, there may be a plurality of DUs, where each DU and the terminal may use the method for calculating uplink transmission power according to the embodiment of the present application. The CU-DU split scenario differs from the multi-TRP scenario in that TRP is just one radio frequency unit or one antenna device, whereas protocol stack functions may be implemented in DUs or CUs, e.g. physical layer functions may be implemented in DUs.

The access network device provides service for a cell, and the terminal device communicates with the access network device through transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell, where the cell may be a cell corresponding to the access network device (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), where the small cell may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

The terminal side device in the embodiment of the application can comprise a terminal device whole machine and a terminal chip in the terminal device. The whole terminal equipment can also be called: a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, etc. For simplicity of description, the terminal equipment is hereinafter referred to as a terminal equipment complete machine.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc.

In addition, in the embodiment of the application, the terminal device may also be a terminal device in an internet of things (internet of things, ioT) system, and the IoT is an important component of future information technology development, and the main technical characteristic of the terminal device is that the article is connected with a network through a communication technology, so that an intelligent network for man-machine interconnection and internet of things interconnection is realized.

While the various terminal devices described above, if located on a vehicle (e.g., placed in a vehicle or mounted in a vehicle), may be considered as in-vehicle terminal devices, for example, also referred to as in-vehicle units (OBUs).

In the embodiment of the application, the terminal device may further include a relay (relay). Or it is understood that all that is capable of data communication with a base station can be seen as a terminal device.

Fig. 1 shows a schematic diagram of a communication system 100 of the present application. Communication system 100 includes communication satellite 110, access network device 120, terminal device 130, terminal device 140, terminal device 150, terminal device 160, and terminal device 170. The communication satellite 110 in fig. 1 is a network device, and may communicate with the terminal device 130 and the terminal device 140, and the communication satellite 110 may also communicate with the access network device 120, where a communication system formed by the communication satellite 110, the access network device 120, the terminal device 130, and the terminal device 140 may be referred to as an NTN system. Access network device 120 in fig. 1 is, for example, a base station. The access network device corresponds to different devices in different systems, for example, may correspond to an eNB in a 4G system, and corresponds to an access network device in 5G in a 5G system, for example, a gNB. Access network device 120 may communicate with terminal device 130, terminal device 140, terminal device 150, and terminal device 160. The terminal device 160 may communicate with the terminal device 170 through device-to-device (D2D), vehicle-to-device (V2X), or machine-to-machine (machine to machine, M2M) technologies. The technical scheme provided by the application can also be applied to a future mobile communication system, so that the access network device in fig. 1 can also correspond to the access network device in the future mobile communication system. In fig. 1, the access network device is a base station, and in fact, referring to the foregoing description, the access network device may also be an access point or other device.

It should be understood that more devices may be included in the communication system shown in fig. 1, such as other terminal devices or access network devices, and that the access network devices or terminal devices included in the communication system shown in fig. 1 may be access network devices or terminal devices of the various forms described above. Embodiments of the present application are not shown in the figures one by one.

For a clearer understanding of the present application, a brief description of the NTN system will be first provided.

NTN is a non-terrestrial communication system that includes satellite communication networks.

Communication satellites can be classified into three categories according to satellite orbit type:

geostationary orbit (geostationary orbit, GEO), 35,786 km from the earth's surface. GEO orbits have a feature that when an observer views a satellite in that orbit from the ground, the apparent position of the satellite does not change and appears to be stationary in the sky. This is because the orbital period of the stationary orbiting satellite and the earth rotation period coincide exactly. The advantage of this orbit is that the antenna of the ground station can be fixed towards the satellite's location without having to turn the antenna to track the satellite.

The earth orbit (middle earth orbit, MEO) is relatively close to the earth's surface, with orbit heights ranging from 2,000 km to 35,786 km.

Low Earth Orbit (LEO), lower than medium earth orbit, is about 160 to 2,000 km from the ground surface.

The satellite orbit height can reach hundreds of kilometers to tens of thousands of kilometers, so that the communication propagation delay of the satellite communication network is larger. Taking the orbit height of 508km as an example, the one-way propagation delay of the satellite and the satellite-borne point user can reach 1.69ms.

In time division duplex (time division duplex, TDD) communication, a Guard Period (GP) needs to be introduced between uplink and downlink transitions to avoid interference between uplink and downlink signals. The GP includes a downlink-to-uplink guard interval and an uplink-to-downlink guard interval. The protection interval between the downlink and the uplink is larger than the sum of the maximum Round Trip Delay (RTD) generated by the coverage area and the transmit-receive conversion delay of the equipment. For the NTN system, if a TDD communication system is adopted, the GP length needs to be set to be greater than the bidirectional propagation delay, resulting in excessive GP overhead. Thus, NTN systems commonly employ frequency division duplex (frequency division duplex, FDD) communication schemes. Because the bandwidth of the NTN system is generally larger and the frequency spectrum is relatively scattered, the interval between the uplink and downlink frequency spectrums is generally larger.

In the process of wireless signal propagation, the intensity of electromagnetic wave is affected by path loss and shadow fading, so that the intensity of the signal at the transmitting end is reduced when the signal reaches the receiving end, so that the transmitting end needs to appropriately increase the transmitting power to compensate the influence caused by the path loss and shadow fading. And secondly, the higher transmitting power is beneficial to reducing the block error rate and the packet loss rate, improving the transmission reliability, and simultaneously is beneficial to applying a higher-order modulation coding scheme and improving the frequency spectrum efficiency. However, if the transmitting end uses too high transmission power, stronger interference can be generated to other transmission processes of the same time-frequency resource, and higher energy can be consumed, which is unfavorable for energy saving (especially unfavorable for the battery life of the terminal equipment).

In summary, the transmitting end needs to perform transmit power control when transmitting signals, so as to compensate the influence caused by path loss and shadow fading, ensure the quality of the signals received by the receiving end, and meanwhile, inhibit the interference between cells with the same frequency, thereby meeting the network coverage and capacity requirements.

In LTE and NR communications, channel quality is estimated using the downlink pathloss measured by the terminal device, and the estimated channel quality is used as a basis for uplink transmission power. For example, refer to the following calculations of the transmit power of several downlink channels.

The physical random access channel (Physical Random Access Channel, PRACH) transmit power calculation formula is shown in formula (1):

P _PRACH ＝min{P _CMAX ，P _{0_pre} +Δ _preamble +(N _pre -1)×Δ _step +PL}[dBm] (1)

wherein:

P _PRACH the PRACH uplink transmitting power of the terminal equipment on the appointed frequency band;

P _CMAX the access network equipment configures the maximum uplink transmitting power of the terminal to the terminal;

P _{0_pre} is the uplink expected received power of the PRACH channel;

Δ _preamble indicating whenA power offset value of 0 for a preamble format of the preamble configuration with respect to the preamble format;

PL is the downlink loss measured by the terminal device based on the downlink reference signal.

The calculation formula of the transmission power of the physical uplink shared channel (physical uplink shared channel, PUSCH) is shown in formula (2):

P _PUSCH ＝min{P _CMAX ，P _{0_PUSCH} +α _PUSCH ×PL+f(i)+10×log ₁₀ (2 ^μ ×M _PUSCH )+ΔTF[dBm] (2)

wherein:

P _PUSCH the PUSCH uplink transmission power of the terminal equipment on the appointed frequency band;

P _{0_PUSCH} is the uplink expected receiving power spectrum of access network equipment side of the PUSCH;

M _PUSCH the unit is RB, which is the uplink PUSCH sending bandwidth;

α _PUSCH is a partial path loss compensation factor and is used for determining the influence of the path loss in power control;

PL is the downlink loss measured by the terminal device based on the downlink reference signal;

Δ _TF the power offset values determined for different modulation schemes;

f (i) is a closed loop power adjustment amount, and the access network device can perform power correction by sending the power adjustment amount through the measured deviation between the uplink power and the expected power.

The physical uplink control channel (Physical Uplink Control Channel, PUCCH) channel transmission power calculation formula is shown in (3):

P _PUCCH ＝min{P _CMAX ，P _{0_PUCCH} +PL+g(i)+10×log ₁₀ (2 ^μ ×M _PUCCH )+Δ _TF +ΔF_PUCCH(F)[dBm] (3)

wherein:

P _PUCCH is the PUCCH uplink sending power of the terminal equipment on the appointed frequency bandA rate;

P _{0_PUCCH} an uplink expected receiving power spectrum of access network equipment side of the PUCCH channel;

M _PUCCH the uplink PUCCH transmission bandwidth is the unit of RB;

Δ _FPUCCH (F) Is the power offset value of different PUCCH formats;

Δ _TF the power offset values determined for different modulation schemes;

g (i) is a closed loop power adjustment amount, and the access network device can perform power correction by sending the power adjustment amount through the measured deviation between the uplink power and the expected power.

The channel sounding reference signal (Sounding Reference Signal, SRS) transmit power calculation formula is shown in formula (4):

P _SRS ＝min{P _CMAX ，P _{0_SRS} +α _SRS ×PL+h(i)+10×log ₁₀ (2 ^μ ×M _SRS )}[dBm] (4)

wherein:

P _SRS the PUCCH uplink transmission power of the terminal equipment on a designated frequency band;

P _{0_SRS} is the uplink expected receiving power spectrum of the access network equipment side of the SRS channel;

M _SRS is the uplink SRS transmission bandwidth;

α _SRS is a partial path loss compensation factor and is used for determining the influence of the path loss in power control;

h (i) is a closed loop power adjustment amount, and the access network device can perform power correction by sending the power adjustment amount through the measured deviation between the uplink power and the expected power.

PL in all the above formulas is estimated by a downlink Reference Signal (Synchronization Signal and PBCH block, SSB) or a channel state information-Reference Signal (CSI-RS), and the calculation formula of PL is shown in formula (5):

PL＝reference Signal Power-higher layer filter RSRP (5)

Wherein reference Signal Power is the transmitting power of the downlink reference signal at the access network device side, and RSRP is the signal strength measured by the terminal.

In the above formula, the downlink path loss PL is used as the uplink path loss, and the uplink required transmission power is calculated. However, in NTN systems, the bandwidth is generally larger, and the spectrum is relatively scattered, resulting in a generally larger uplink and downlink spectrum interval. Determining uplink transmission power by using downlink path loss PL equivalent to uplink path loss may cause uplink transmission power to be inconsistent with expectations. For example, assume that a satellite communication system access network device operates in a frequency band: downlink 3600-3700MHz and uplink 5091-5250MHz; considering a low-orbit satellite communication system with an orbit height of 508Km, assuming that the scanning angle of the phased array antenna is ±33° x±45°, the communication distance of the satellite is 508Km-841Km. Then, the uplink and downlink free space path loss (free space path loss, FSPL) is calculated according to the free space path loss calculation formula of the following formula (6):

FSPL＝92.4+20*log(D)+20*log(M) (6)

wherein, D: the free space propagation distance of the wireless signal is in km; m: communication frequency in GHz.

The free space path loss for different communication distances for this system is shown in fig. 2. As can be seen from fig. 2, with this system, the uplink path loss is 3dB greater than the downlink path loss without considering other factors, but in the prior art, the uplink transmission power is calculated by equivalent of the downlink path loss as the uplink path loss, so the calculated uplink transmission power is 3dB less than the truly required uplink transmission power, and thus the uplink transmission power is insufficient.

And the uplink transmitting power is also affected by the uplink and downlink antenna gains of the terminal equipment and the access network equipment.

Assume that a satellite communication system access network operates in a frequency band: downlink 3600-3700MHz and uplink 5091-5250MHz, the downlink wavelength is about 0.0822m, and the uplink wavelength is 0.0577m. In NTN systems, there are both hand-held terminals and phased array terminals. For the handheld terminal, the number of the uplink and downlink antenna array elements is considered to be 1, and the gains of the uplink and downlink arrays are the same.

Assuming that the phased array terminal in the system uses the antenna panels with the same physical area for uplink and downlink, for the phased array antenna panels with the same physical size (e.g., 1m×1 m), the number of antenna elements corresponding to downlink is (1 m/(0.0822/2)) (1 m/(0.0822/2))=576, and the number of antenna elements corresponding to uplink is (1 m/(0.0577/2)) (1 m/(0.0577/2))=1156;

different antenna element numbers will result in a difference in uplink and downlink array gain, which, as analyzed above, is 101g10 (1156) -101g10 (576) =3 dB for the phased array terminal.

It can be seen that the hand-held terminal has the same uplink and downlink array gain, and the phased array terminal uplink array gain is 3dB greater than the downlink array gain.

Assume that a satellite communication system access network operates in a frequency band: downlink 3600-3700MHz and uplink 5091-5250MHz, the downlink wavelength is about 0.0822m, and the uplink wavelength is 0.0577m.

Assuming that antenna panels with the same physical area are adopted for uplink and downlink of access network equipment in the system, for phased array antenna panels with the same physical size (for example, 1m×1 m), the number of antenna elements corresponding to downlink is (1 m/(0.0822/2)) (1 m/(0.0822/2))=576, and the number of antenna elements corresponding to uplink is (1 m/(0.0577/2)) (1 m/(0.0577/2))=1156;

different antenna element numbers will result in a difference in uplink and downlink array gain, which, as analyzed above, is 10lg10 (1156) -10lg10 (576) =3 dB for the access network device.

It can be seen that the access network device upstream array gain is 3dB greater than the downstream array gain.

From the above description, it can be seen that, the downlink loss is equivalent to the uplink loss, and the uplink transmission power is calculated, where the calculated uplink transmission power is 3dB smaller than the uplink transmission power actually required, which may result in insufficient uplink transmission power. And the uplink transmitting power is influenced by the uplink and downlink antenna gains of the terminal equipment and the uplink and downlink antenna gains of the access network equipment. In view of this, the present application provides a method for calculating uplink transmission power, where the method considers the influence of the uplink and downlink frequency point difference, the uplink and downlink antenna gain difference of the terminal, and the uplink and downlink antenna gain difference of the access network device on the uplink transmission power.

A method for calculating uplink transmission power provided in the present application is described in detail below with reference to fig. 3, and fig. 3 is a schematic flowchart of a method 200 for calculating uplink transmission power in the present application. The method 200 may be applied to the application scenario described above, but may also be applied to other communication scenarios, which are not limited herein.

It should also be understood that, in the embodiment of the present application, the method is described taking the access network device and the terminal device as an execution body of the execution method. By way of example, and not limitation, the execution subject of the execution method may also be a chip, a chip system, or a processor or the like applied to the terminal device and the access network device.

As shown in fig. 3, the method 200 shown in fig. 3 may include S210 to S220. The various steps in method 200 are described in detail below in conjunction with fig. 3.

S210, the terminal equipment acquires the transmission power compensation quantity of the uplink signal, wherein the transmission power compensation quantity comprises an uplink and downlink frequency difference compensation quantity and/or an uplink and downlink antenna gain difference compensation quantity.

S220, the terminal equipment determines the actual transmission power of the uplink signal according to the transmission power compensation quantity.

The terminal equipment determines the actual transmission power of the uplink signal according to the obtained transmission power compensation quantity of the uplink signal, wherein the transmission power compensation quantity comprises an uplink and downlink frequency difference compensation quantity and/or an uplink and downlink antenna gain difference compensation quantity, and the uplink and downlink frequency difference compensation quantity and/or the uplink and downlink antenna gain difference compensation quantity can more accurately determine the actual transmission power of the uplink signal, so that the influence caused by insufficient transmission power of the uplink signal is reduced, and the performance of a communication system is improved.

Optionally, the uplink and downlink antenna gain difference compensation amount includes an uplink and downlink antenna gain difference compensation amount of the access network device and an uplink and downlink antenna gain difference compensation amount of the terminal device. Determining the actual transmission power of the uplink signal according to the transmission power compensation amount, including: and determining the actual transmitting power of the uplink signal according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

Optionally, in step S210, the terminal device obtaining the transmission power compensation amount of the uplink signal includes:

the terminal equipment determines an uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency;

the terminal equipment determines the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment;

and the terminal equipment determines the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment.

It should be understood that the access network device may send the downlink antenna gain and the uplink antenna gain of the access network device to the terminal device through signaling. Correspondingly, the terminal equipment receives the signaling from the access network equipment and acquires the downlink antenna gain and the uplink antenna gain of the access network equipment. Therefore, the terminal equipment determines the uplink and downlink antenna gain difference compensation quantity of the access network equipment according to the downlink antenna gain and the uplink antenna gain of the access network equipment.

For example, during initial access, the access network device broadcasts a synchronization signal and a physical broadcast channel (phisical broadcast channel, PBCH) block (synchronization signal and PBCH block, SSB), and the corresponding terminal device searches for the SSB, obtains a master information block (Master information block, MIB) and further obtains a system information block SIB. And the MIB or the SIB can carry the downlink antenna gain and the uplink antenna gain of the access network equipment.

For another example, in the random access procedure, the access network device may send the downlink antenna gain and the uplink antenna gain of the access network device to the terminal device through the message 2 or the message 4.

For another example, during the radio resource control (Radio Resource Control, RRC) reconfiguration, the access network device may send the downlink antenna gain and the uplink antenna gain of the access network device to the terminal device through RRC messages.

Optionally, in step S210, the terminal device obtaining the transmission power compensation amount of the uplink signal includes: the terminal equipment receives the transmission power compensation quantity of the uplink signal transmitted by the access network equipment, and the transmission power compensation quantity comprises the following components: the uplink and downlink frequency difference compensation amount, the uplink and downlink antenna gain difference compensation amount of the access network equipment and the uplink and downlink antenna gain difference compensation amount of the terminal equipment.

Specifically, the access network device may calculate the uplink and downlink frequency difference compensation amount, the uplink and downlink antenna gain difference compensation amount of the access network device, and the uplink and downlink antenna gain difference compensation amount of the terminal device, and then send the result obtained by calculation to the terminal device through signaling.

It should be understood that the terminal device may send the downlink antenna gain and the uplink antenna gain of the terminal device to the access network device through signaling. Correspondingly, the access network equipment receives the signaling from the terminal equipment, and acquires the downlink antenna gain and the uplink antenna gain of the terminal equipment. Therefore, the access network equipment determines the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment.

For example, the terminal device sends the downlink antenna gain and the uplink antenna gain of the terminal device to the access network device through the capability report message.

From the above description, both the terminal device and the access network device can determine the uplink and downlink frequency difference compensation amount, the uplink and downlink antenna gain difference compensation amount of the terminal device, and the uplink and downlink antenna gain difference compensation amount of the access network device.

How to determine the uplink and downlink frequency difference compensation amount, the uplink and downlink antenna gain difference compensation amount of the terminal device, and the uplink and downlink antenna gain difference compensation amount of the access network device will be specifically described below by using an embodiment.

First, according to the up communication frequency and the down communication frequency, determining the up-down frequency difference compensation amount includes:

calculating an uplink-downlink frequency difference compensation amount according to equation (7):

wherein UL frequency is an uplink communication frequency, and DL frequency is a downlink communication frequency.

Optionally, the uplink communication frequency may be an intermediate frequency point of the uplink communication frequency spectrum, and similarly, the downlink communication frequency may be an intermediate frequency point of the downlink communication frequency spectrum.

It should be understood that, regarding the determination of the uplink communication frequency and the downlink communication frequency, the application is not limited, and for example, the uplink communication frequency and the downlink communication frequency may also be the starting frequency point of the uplink communication spectrum and the starting frequency point of the downlink communication spectrum, respectively.

Secondly, determining an uplink and downlink antenna gain difference compensation amount of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment, including:

determining the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the formula (8):

the UE DL Ant num is the number of downlink antenna elements of the terminal device, and the UE UL Ant num is the number of uplink antenna elements of the terminal device. Wherein the antenna array is arranged on the antenna panel.

Thirdly, determining an uplink and downlink antenna gain difference compensation amount of the access network device according to the downlink antenna gain and the uplink antenna gain of the access network device, including:

Calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment according to the formula (9):

wherein, gNB DL Ant num is the number of downlink antenna elements of the access network device, and gNB UL Ant num is the number of uplink antenna elements of the access network device.

The uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the terminal equipment and the uplink and downlink antenna gain difference compensation quantity of the access network equipment are unified into a transmission power compensation quantity PL _compensation And the relationship thereof satisfies the formula (10):

accordingly, when calculating the actual transmission power of the uplink signal, the actual transmission power of the uplink signal is determined according to the transmission power compensation amount. Such as:

the calculation formula of the transmission power of the uplink PRACH is shown as (11):

P _PRACH ＝min{P _CMAX ，P _{0_pre} +Δ _preamble +(N _pre -1)×Δ _step +PL+PL _compensation } (11)

the uplink PRACH channel is a channel used by the terminal equipment for initiating random access, and the terminal equipment realizes uplink synchronization and uplink access through the uplink PRACH channel.

The calculation formula of the uplink PUSCH transmission power is shown as (12):

P _PUSCH ＝min{P _CMAX ，P _{0_PUSCH} +α _PUSCH ×(PL+PL _compensation )+f(i)+10×log ₁₀ (2 ^μ ×MPUSCH+ΔTF (12)

the uplink PUSCH is used as a main uplink data bearing channel of the physical layer and is used for scheduling and transmitting uplink data.

The calculation formula of the uplink PUCCH channel transmission power is shown as (13):

P _PUCCH ＝min{P _CMAX ，P _{0_PUCCH} +PL+PL _compensation +g(i)+10×log ₁₀ (2 ^μ ×M _PUCCH )+ΔTF+ΔF_PUCCH(F) (13)

the uplink PUCCH channel is used for uplink transmission of a scheduling request by a terminal device, and mainly carries parameters such as precoding matrix indicator (precoding matrix indicator, PMI), channel Rank Indicator (RI), channel state indicator (channel quality indicator, CQI), and the like.

The calculation formula of the uplink SRS channel transmission power is shown as (14):

P _SRS ＝min{P _CMAX ，P _{0_SRS} +a _SRS ×(PL+PL _compensation )+h(i)+10×log ₁₀ (2 ^μ ×M _SRS )} (14)

the uplink SRS channel is used for the access network device to estimate the quality of the uplink channel.

In this embodiment, the amount of offset of the uplink-downlink frequency difference is increased by adding the amount of offset of the uplink-downlink frequency difference to the communication system with the generally larger uplink-downlink frequency spectrum intervalFSPL of uplink and downlink path loss caused by frequency point difference in a communication system with generally larger uplink and downlink spectrum interval is solved; up-down antenna gain difference compensation quantity of newly added access network equipment>The antenna gain difference of access network equipment in a communication system with generally larger uplink and downlink spectrum intervals is solved; up-down antenna gain difference compensation amount of newly added terminal equipment>The uplink and downlink antenna gain difference compensation amounts of different terminal devices may be different, so that uplink performance difference caused by uplink and downlink performance difference of different terminal devices in uplink power control is solved, and the compensation of the uplink and downlink antenna gain difference of the UE level is realized.

For a clearer understanding of the embodiments of the present application, the following description is made by way of a specific example.

Assume that a satellite communication system access network operates in a frequency band: downlink 3600-3700MHz and uplink 5091-5250MHz; considering a low-orbit satellite communication system with an orbit height of 508Km, assuming that the scanning angle of the phased array antenna is ±33° x±45°, the communication distance of the satellite is 508Km-841Km.

For the system, a center frequency point 3650MHz of a downlink frequency band is selected as a downlink communication frequency, a center frequency point 5170.5MHz of an uplink frequency band is selected as an uplink communication frequency, and then the uplink and downlink frequency difference compensation quantity is as follows:

for the access network device in the system, if the downlink antenna array number of the access network device is 1000 and the uplink antenna array number is 1200, the uplink and downlink antenna gain difference compensation amount of the access network device is:

for a handheld terminal device in the system, the compensation quantity of the uplink and downlink antenna gain difference is as follows:

for the phased array terminal equipment in the system, if the downlink antenna array number of the phased array terminal equipment is 576 and the uplink antenna array number is 1156, the uplink and downlink antenna gain difference compensation quantity of the phased array terminal equipment is:

thus, for a handheld terminal device in the system, PL _compensation 3.025-0.79+0=2.235 dB; for phased array termination devices in the system, PL _compensation 3.025-0.79-3.1 = -0.865dB.

The above embodiments specifically describe how to determine the uplink and downlink frequency difference compensation amount, the uplink and downlink antenna gain difference compensation amount of the terminal device, and the uplink and downlink antenna gain difference compensation amount of the access network device.

In another implementation manner, in order to reduce the calculation amount of the terminal device, the terminal device may use the uplink and downlink antenna gain difference compensation amount of the terminal device as the transmission power compensation amount, the access network device transmits the reception power expected by the uplink signal to the terminal device, where the reception power expected by the uplink signal includes the uplink and downlink frequency difference compensation amount and the uplink and downlink antenna gain difference compensation amount of the access network device, and the terminal device determines the actual transmission power of the uplink signal according to the transmission power compensation amount and the reception power expected by the uplink signal.

Alternatively, the received power expected by the uplink signal may be preconfigured, for example, the received power expected by the uplink signal is already prefabricated by the terminal device at the time of shipment.

It should be understood that the access network device may determine the uplink and downlink antenna gain difference compensation amount according to the formula (7), the access network device may determine the uplink and downlink antenna gain difference compensation amount of the access network device according to the formula (9), and the terminal device determines the uplink and downlink antenna gain difference compensation amount of the terminal device according to the formula (8), which is specifically referred to the above description and will not be repeated here.

Taking the gain difference compensation quantity of the uplink and downlink antennas of the terminal equipment as the transmission power compensation quantity PL _compensation And the relationship thereof satisfies the formula (15):

when the parameter setting of the received power P0 expected by the uplink signal is performed at the access network device side, assuming that the P0 parameter obtained based on the existing network planning method is p0_pre_ori/p0_pusch_ori/p0_pucch_ori/p0_ srs _ori, the P0 parameter to be set is calculated and configured according to the following formulas (16), (17), (18) and (19):

correspondingly, the calculation formula of the transmission power of the uplink PRACH channel is shown in formula (20):

P _PRACH ＝min{P _CMAX ，P _{0_pre} +Δ _preamble +(N _pre -1)×Δ _step +PL+PLcompensation (20)

other parameters in the formula. It will be appreciated with reference to the foregoing description that, in order to avoid repetition, no further description is provided herein.

The uplink PUSCH channel transmission power, the uplink PUCCH channel transmission power, and the uplink SRS channel transmission power calculation may refer to an uplink PRACH channel transmission power calculation procedure.

In this embodiment, the access network adjusts the received power P expected by the uplink signal by the difference in antenna gain according to the uplink FSPL and the access network device at the time of network planning ₀ The method solves the problems that FSPL of uplink and downlink path loss and uplink and downlink antenna gain difference of access network equipment caused by frequency point difference in a communication system with generally larger uplink and downlink frequency spectrum interval are solved, and the uplink and downlink antenna gain difference compensation quantity of terminal equipment is newly addedThe uplink and downlink antenna gain difference compensation amounts of different terminal devices may be different, so that uplink performance difference caused by uplink and downlink performance difference of different terminals in uplink power control is solved, and the compensation of the uplink and downlink antenna gain difference of the UE level is realized.

For the system, a center frequency point 3650MHz of a downlink frequency band is selected as a downlink communication frequency point, a center frequency point 5170.5MHz of an uplink frequency band is selected as an uplink communication frequency point, and the compensation amount of the uplink frequency difference is as follows:

then for the P0 parameter set in the system, if an initial P _{0_pre_ori} And P _{0_pusch_ori} Are all-100 dBm, alpha _PUSCH All 0.9, then:

P _{0_pre} ＝-100dBm-0.79dB+3.025dB＝-97.765dBm

P _{0_PUSCH} ＝-100dBm+0.9*(-0.79dB+3.025dB)＝-97.9885dBm

for a handheld terminal in a system,

for a phased array terminal in the system, if the number of downlink antenna elements is 576 and the number of uplink antenna elements is 1156, then

Thus, for a handheld terminal in the system, PL _compensation OdB; for phased array terminals in the system, PL _compensation Is-3.1 dB.

The above two embodiments describe how the actual transmission power of the uplink signal is determined based on the transmission power offset. The amount of transmit power compensation may also be used when selecting an initial camping cell for the terminal device. Specifically, in the prior art, the terminal device determines whether a cell can be camped on to adopt an S criterion, where the S criterion is as follows:

Srxlev＞OSqual＞0

Wherein: srxlev is a cell selection reception level value and square is a cell selection signal quality.

Srxlev is determined according to the following formula (21):

Qrxlevmeas-(Qrxlevmin+Qrxlevminoffset)-Pcompensation-Qoffset _temp (21)

square is determined according to the following formula (22):

Qqualmeas-(Qqualmin+Qqualminoffset)-Qoffset _temp (22)

the meaning of each parameter in the above formula is shown in table 1:

table 1S criterion parameter meanings

/>

When the cell coverage planning is performed, the access network device plans a minimum receiving level Qrxlevmin for the PEMAX1 to reside according to the maximum transmitting capability supported by all the terminal devices. However, for a part of terminal equipment with poor uplink transmission capability, the maximum transmission power PowerClass is smaller than PEMAX1, and if Qrxlevmin still planned in advance is still used as a decision threshold, the uplink transmission power of the terminal equipment is insufficient during access, so that access failure is caused. Thus, pcompensation is introduced in the protocol to compensate for differences in the transmission capabilities of the terminal devices. At present, pcompensation is only determined according to downlink loss, but difference of uplink and downlink loss, difference of uplink and downlink antenna gains of terminal equipment and difference of uplink and downlink antenna gains of access network equipment are not fully considered, so that the problem of inaccurate judgment of the terminal equipment when judging whether the terminal equipment can reside in a certain cell is caused.

In another embodiment, for a terminal cell camping scene, by introducing an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount into an S criterion decision formula, the problem of inaccurate decision of the initial camping cell selection of the terminal device in the communication system with the generally larger uplink and downlink frequency spectrum interval is solved.

it should be understood that the calculation methods of the uplink and downlink frequency difference compensation amount, the uplink and downlink antenna gain difference compensation amount of the terminal device, and the uplink and downlink antenna gain difference compensation amount of the access network device may refer to the above calculation processes, and are not described herein again.

Correspondingly, the terminal equipment residence decision threshold formula is as follows:

terminal residence condition: srxlev > 0 AND square > 0

Wherein,

Srxlev＝Qrxlevmeas-PL _compensation -(Qrxlevmin+Qrxlevminoffset)-Pcompensation-Qoffsettemp，

square can be calculated with reference to equation (22).

In this embodiment, for the problem of inaccurate residence decision of the terminal device in the communication system with generally larger uplink and downlink spectrum intervals, the method is implemented by introducing the following formula into the S-criterion calculation formulaThe compensation quantity is achieved, and the terminal residence judgment is more accurate under the condition that the original network end Qrxlevmin parameter planning is not required to be changed.

For the system, the central frequency point 3650MHz of the downlink frequency band is selected as the downlink communication frequency point, and the central frequency point 5170.5MHz of the uplink frequency band is selected as the uplink communication frequency point

For the access network device in the system, if the number of downlink antenna elements is 1000 and the number of uplink antenna elements is 1200, then

For a handheld terminal in a system,

for a phased array terminal in the system, if the number of downlink antenna elements is 576, the number of uplink antenna elements is1156, then

Thus, for a handheld terminal in the system, PL _compensation 3.025-0.79+0=2.235 dB; for phased array terminals in the system, PL _compensation 3.025-0.79-3.1 = -0.865dB.

Introducing PL in S-criterion decision formula _compensation The method solves the problem of inaccurate judgment of the initial residence cell selection of the terminal equipment in the NTN system.

In another implementation manner, aiming at the problem of inaccurate terminal residence judgment in a communication system with a generally larger uplink and downlink spectrum interval, an additional compensation value can be added on the preset receiving power, namely the minimum receiving power Qrxlevmin parameter configuration, of an access network device side when the access network device side is planned, wherein the preset receiving power comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network device, the transmitting power compensation amount comprises an uplink and downlink antenna gain difference compensation amount of the terminal device, and the terminal device determines the cell selection receiving level value according to the transmitting power compensation amount and the preset receiving power.

when the parameter setting of the minimum receiving power Qrxlevmin is carried out on the access network equipment side, if the Qrxlevmin parameter obtained based on the existing network planning method is Qrxlevmin_ori, the Qrxlevmin parameter to be set is calculated and configured according to a formula (23):

correspondingly, the terminal residence decision threshold formula in this embodiment is as follows:

terminal residence condition: srxlev > 0 AND square > 0

Wherein,

square can be calculated with reference to equation (22).

In this embodiment, aiming at the problem of inaccurate residence decision of the terminal equipment in the communication system with generally larger uplink and downlink spectrum intervals, the method is introduced into the network end Qrxlevmin parameter planningCompensating the amount and introducing +.>The compensation quantity achieves the beneficial effect that the terminal residence judgment is more accurate.

Assume that a satellite communication system access network operates in a frequency band: downlink 3600-3700 MHz and uplink 5091-5250 MHz; consider a low-orbit satellite communications system with an orbit height of 508Km, assuming a phased array antenna scan angle of 33. X.+ -. 45. The communication distance of the satellite is 508km to 841km.

Then for the Qrxlevmin parameter set in the system, if the original Qrxlevmin is-100 dBm:

Qrxlevmin＝-100dBm-0.79dB+3.025dB＝-97.765dBm

For a handheld terminal in a system,

Thus, for a handheld terminal in the system, PL _compensation 0dB; for phased array terminals in the system, PL _compensation 3.025-0.79-3.1 = -3.1dB.

The method according to the embodiment of the present application is described in detail above with reference to fig. 1 to 3. The following describes the communication device according to the embodiment of the present application in detail with reference to fig. 4 to 6.

Fig. 4 shows a schematic block diagram of a communication device 300 of an embodiment of the present application.

In some embodiments, the apparatus 300 may be a terminal device, or may be a chip or a circuit, for example, a chip or a circuit that may be disposed on the terminal device.

In some embodiments, the apparatus 300 may be an access network device, or may be a chip or a circuit, for example, may be disposed on the access network device.

In one possible approach, the apparatus 300 may include a processing unit 310 (i.e., an example of a processor) and a transceiver unit 330. In some possible implementations, the processing unit 310 may also be referred to as a determination unit. In some possible implementations, the transceiver unit 330 may include a receiving unit and a transmitting unit.

Alternatively, the transceiver unit 330 may be implemented by a transceiver or transceiver related circuits or interface circuits.

Optionally, the apparatus may further comprise a storage unit 320. In one possible implementation, the storage unit 320 is configured to store instructions. Alternatively, the storage unit may be used for storing data or information. The storage unit 320 may be implemented by a memory.

In some possible designs, the processing unit 310 is configured to execute the instructions stored in the storage unit 320, so that the apparatus 300 implements the steps performed by the terminal device in the above method. Alternatively, the processing unit 310 may be configured to invoke the data of the storage unit 320, so that the apparatus 300 implements the steps performed by the terminal device in the method described above.

In some possible designs, the processing unit 310 is configured to execute the instructions stored in the storage unit 320, so that the apparatus 300 implements the steps performed by the access network device in the method described above. Alternatively, the processing unit 310 may be configured to invoke the data of the storage unit 320, so that the apparatus 300 implements the steps performed by the access network device in the method described above.

For example, the processing unit 310, the storage unit 320, and the transceiver unit 330 may communicate with each other via internal communication paths to transfer control and/or data signals. For example, the storage unit 320 is configured to store a computer program, and the processing unit 310 may be configured to invoke and run the computer program from the storage unit 320 to control the transceiver unit 330 to receive signals and/or send signals, so as to complete the steps of the terminal device or the access network device in the above method. The memory unit 320 may be integrated into the processing unit 310 or may be provided separately from the processing unit 310.

Alternatively, if the apparatus 300 is a communication device (e.g., a terminal device, or an access network device), the transceiver unit 330 includes a receiver and a transmitter. Wherein the receiver and the transmitter may be the same or different physical entities. Which are the same physical entities, may be collectively referred to as transceivers.

Alternatively, if the device 300 is a chip or a circuit, the transceiver 330 includes an input interface and an output interface.

As an implementation, the function of the transceiving unit 330 may be considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. The processing unit 310 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.

As another implementation manner, a manner of using a general-purpose computer may be considered to implement the communication device (such as a terminal device or an access network device) provided in the embodiments of the present application. I.e., program codes realizing the functions of the processing unit 310 and the transceiving unit 330 are stored in the storage unit 320, and the general-purpose processing unit realizes the functions of the processing unit 310 and the transceiving unit 330 by executing the codes in the storage unit 320.

In some embodiments, the apparatus 300 may be a terminal device, or a chip or a circuit provided in the terminal device.

When the apparatus 300 is a terminal device, or a chip or a circuit disposed in the terminal device, the processing unit 310 is configured to obtain a transmission power compensation amount of an uplink signal, where the transmission power compensation amount includes an uplink-downlink frequency difference compensation amount and/or an uplink-downlink antenna gain difference compensation amount; the processing unit 310 is further configured to determine an actual transmission power of the uplink signal according to the transmission power compensation amount.

Optionally, the uplink and downlink antenna gain difference compensation amount includes an uplink and downlink antenna gain difference compensation amount of the access network device and an uplink and downlink antenna gain difference compensation amount of the terminal device; the processing unit 310 specifically is configured to: and determining the actual transmitting power of the uplink signal according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

It should be understood that when the apparatus 300 is configured in or is a terminal device, each module or unit in the apparatus 300 may be used to perform each action or process performed by the terminal device in the above method, and detailed descriptions thereof are omitted herein for avoiding redundancy.

In some embodiments, the apparatus 300 may be a chip or a circuit when the access network device is, or is disposed in the access network device. When the apparatus 300 is an access network device, or a chip or a circuit disposed in the access network device, the processing unit 310 is configured to obtain an uplink and downlink antenna gain difference compensation amount of the access network device; and the receiving and transmitting unit is used for transmitting the uplink and downlink antenna gain difference compensation quantity of the access network equipment to the terminal equipment so as to be used for determining uplink transmission power by the terminal equipment according to the uplink and downlink antenna gain difference compensation quantity of the access network equipment.

It should be understood that when the apparatus 300 is configured in or is an access network device, each module or unit in the apparatus 300 may be configured to perform each action or process performed by the access network device in the above method, and detailed descriptions thereof are omitted herein for avoiding redundancy.

The concepts related to the technical solutions provided in the embodiments of the present application, explanation, detailed description and other steps related to the apparatus 300 refer to the descriptions of the foregoing methods or other embodiments, and are not repeated herein.

It should be noted that, in the present application, the processing unit 310 may be implemented by a processor, the storage unit 320 may be implemented by a memory, and the transceiver unit 330 may be implemented by a transceiver, as shown in fig. 5, where fig. 5 is a schematic structural diagram of a communication device 400 provided in the present application. Communication device 400 may include a processor 410, a memory 420, and a transceiver 430. The processor 410, the memory 420 and the transceiver 430 are used to implement the functions of the processing unit 310, the storage unit 320 and the transceiving unit 330, respectively. And will not be described in detail herein.

Fig. 6 is a schematic structural diagram of a terminal device 500 provided in the present application. The terminal device 500 may perform the actions performed by the terminal device in the above-described method embodiment.

For convenience of explanation, fig. 6 shows only major components of the terminal device. As shown in fig. 6, the terminal device 500 includes a processor, a memory, a control circuit, an antenna, and input-output means.

The processor is mainly configured to process the communication protocol and the communication data, control the entire terminal device, execute a software program, and process the data of the software program, for example, to support the terminal device to execute the actions described in the above embodiment of the method for indicating the transmission precoding matrix. The memory is mainly used for storing software programs and data, for example, for storing the codebook described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit together with the antenna, which may also be called a transceiver, is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the terminal device is started, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data is required to be transmitted wirelessly, the processor carries out baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signal and then transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that for ease of illustration, fig. 6 shows only one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or storage device, etc., and embodiments of the present application are not limited in this regard.

For example, the processor may include a baseband processor, which is mainly used to process the communication protocol and the communication data, and a central processor, which is mainly used to control the entire terminal device, execute a software program, and process the data of the software program. The processor in fig. 6 integrates the functions of a baseband processor and a central processing unit, and those skilled in the art will appreciate that the baseband processor and the central processing unit may be separate processors, interconnected by bus technology, etc. Those skilled in the art will appreciate that the terminal device may include multiple baseband processors to accommodate different network formats, and that the terminal device may include multiple central processors to enhance its processing capabilities, and that the various components of the terminal device may be connected by various buses. The baseband processor may also be referred to as a baseband processing circuit or baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, which is executed by the processor to realize the baseband processing function.

For example, in the embodiment of the present application, the antenna and the control circuit having the transceiving function may be regarded as the transceiving unit 510 of the terminal device 500, and the processor having the processing function may be regarded as the processing unit 520 of the terminal device 500. As shown in fig. 6, the terminal device 500 includes a transceiving unit 510 and a processing unit 520. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. Alternatively, the device for implementing the receiving function in the transceiver unit 510 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 510 may be regarded as a transmitting unit, i.e. the transceiver unit includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitting circuit, etc.

Fig. 7 is a schematic structural diagram of an access network device 600 according to an embodiment of the present application, which may be used to implement the functions of the access device (e.g., the first access network device, the second access network device, or the third access network device) in the foregoing method. The access network device 600 includes one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 610 and one or more baseband units (BBU) (also referred to as digital units, DUs) 620. The RRU610 may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., which may include at least one antenna 611 and a radio frequency unit 612. The RRU610 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals, for example, for sending signaling messages to the terminal device. The BBU620 is mainly used for baseband processing, control of a base station, and the like. The RRU610 and BBU620 may be physically located together or physically separate, i.e., distributed base stations.

The BBU620 is a control center of the base station, and may also be referred to as a processing unit, and is mainly configured to perform baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on. For example, the BBU (processing unit) 620 may be configured to control the base station 40 to perform the operation procedures described above in the method embodiments with respect to the access network device.

In one example, the BBU620 may be configured by one or more single boards, where the multiple single boards may support radio access networks of a single access system (such as an LTE system, or a 5G system), or may support radio access networks of different access systems respectively. The BBU620 further comprises a memory 621 and a processor 622. The memory 621 is used to store necessary instructions and data. For example, the memory 621 stores a codebook or the like in the above-described embodiment. The processor 622 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure of the method embodiment described above with respect to the access network device. The memory 621 and processor 622 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In one possible implementation, with the development of system-on-chip (SoC) technology, all or part of the functions of the 620 part and the 610 part may be implemented by SoC technology, for example, by a base station function chip, where a processor, a memory, an antenna interface, and other devices are integrated, and a program of a base station related function is stored in the memory, and the processor executes the program to implement the related function of the base station. Optionally, the base station functional chip can also read the memory outside the chip to realize the relevant functions of the base station.

It should be understood that the structure of the access network device illustrated in fig. 7 is only one possible configuration, and should not constitute any limitation to the embodiments of the present application. The present application does not exclude the possibility of other forms of base station architecture that may occur in the future.

It should be appreciated that in the embodiments of the present application, the processor may be a central processing unit (central processing unit, CPU), the processor may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, RAM) are available, such as Static RAM (SRAM), dynamic RAM (DRAM), and direct memory bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments 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 instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions in accordance with the embodiments of the present application are all or partially produced. The computer instructions may be stored in or transmitted from one computer-readable storage medium, which can be any available medium that can be accessed by a computer or a data storage device, such as a server, data center, etc., that contains a collection of one or more available media. The usable medium may be a magnetic medium or a semiconductor medium. The semiconductor medium may be a solid state disk.

The present application further provides a computer readable medium having stored thereon a computer program which, when executed by a computer, implements the steps performed by the terminal device in any of the above embodiments, or the steps performed by the access network device.

The embodiments of the present application also provide a computer program product, which when executed by a computer, implements the steps performed by the terminal device in any of the embodiments described above, or the steps performed by the access network device.

The embodiment of the application also provides a system chip, which comprises: a communication unit and a processing unit. The processing unit may be, for example, a processor. The communication unit may be, for example, a communication interface, an input/output interface, pins or circuitry, etc. The processing unit may execute the computer instructions, so that the chip in the communication device performs the steps performed by the terminal device or the steps performed by the access network device provided in the embodiments of the present application.

Optionally, the computer instructions are stored in a storage unit.

According to the method provided by the embodiment of the application, the embodiment of the application also provides a communication system, which comprises the access network equipment and the terminal equipment.

The embodiments in this application may be used independently or in combination, and are not limited herein.

Furthermore, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk, digital versatile disc, DVD, etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory, EPROM), cards, sticks, or key drives, etc. Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

It should be understood that an "and/or" describes an association relationship of an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one" means one or more; "at least one of a and B", similar to "a and/or B", describes an association relationship of an association object, meaning that there may be three relationships, for example, at least one of a and B may represent: a exists alone, A and B exist together, and B exists alone.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed.

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

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for calculating uplink transmission power, the method being applied to a terminal device, comprising:

acquiring a transmission power compensation quantity of an uplink signal, wherein the transmission power compensation quantity comprises an uplink and downlink frequency difference compensation quantity and/or an uplink and downlink antenna gain difference compensation quantity;

and determining the actual transmission power of the uplink signal according to the transmission power compensation quantity.

2. The method according to claim 1, wherein the uplink and downlink antenna gain difference compensation amounts include an uplink and downlink antenna gain difference compensation amount of an access network device and an uplink and downlink antenna gain difference compensation amount of a terminal device;

The determining the actual transmission power of the uplink signal according to the transmission power compensation amount includes:

and determining the actual sending power of the uplink signal according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

3. The method according to claim 2, wherein the obtaining the transmission power compensation amount of the uplink signal includes:

determining the uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency;

and determining the uplink and downlink antenna gain difference compensation quantity of the terminal equipment according to the downlink antenna gain and the uplink antenna gain of the terminal equipment.

4. The method of claim 3, wherein the step of,

the determining the uplink and downlink frequency difference compensation amount according to the uplink communication frequency and the downlink communication frequency comprises the following steps:

calculating the uplink and downlink frequency difference compensation amount according to the formula (1):

Determining the uplink and downlink antenna gain difference compensation amount of the terminal equipment according to the formula (2):

the UE DL antenna num is the number of downlink antenna elements of the terminal device, and the UE UL antenna num is the number of uplink antenna elements of the terminal device.

5. The method according to claim 3 or 4, wherein the acquiring the transmission power compensation amount of the uplink signal further comprises:

6. The method of claim 5, wherein determining the uplink and downlink antenna gain difference compensation amount of the access network device according to the downlink antenna gain and the uplink antenna gain of the access network device comprises:

7. The method of claim 1, wherein the transmit power compensation amount comprises a terminal device uplink and downlink antenna gain difference compensation amount;

Acquiring the expected receiving power of the access network equipment on the uplink signal;

determining an actual transmission power of the uplink signal based on the transmission power compensation amount and the expected reception power of the uplink signal,

the expected receiving power of the uplink signal comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network device.

8. The method of claim 7, wherein the obtaining the transmission power offset of the uplink signal comprises:

9. The method according to any one of claims 1 to 8, further comprising:

and determining a receiving level value for initial residence cell selection according to the transmission power compensation quantity of the uplink signal.

10. The method according to claim 9, wherein the transmission power compensation amount of the uplink signal includes an uplink-downlink frequency difference compensation amount, an uplink-downlink antenna gain difference compensation amount of the access network device, and an uplink-downlink antenna gain difference compensation amount of the terminal device;

The determining the receiving level value of the cell selection according to the transmitting power compensation amount includes:

and determining the determined cell selection level receiving value according to the uplink and downlink frequency difference compensation quantity, the uplink and downlink antenna gain difference compensation quantity of the access network equipment and the uplink and downlink antenna gain difference compensation quantity of the terminal equipment.

11. The method of claim 10, wherein the transmission power compensation amount of the uplink signal includes a gain difference compensation amount of an uplink antenna and a downlink antenna of the terminal device;

the determining the cell selection reception level value according to the transmission power compensation amount includes:

determining the cell selection receiving level value according to the transmitting power compensation quantity and the preset receiving power,

the preset receiving power is the receiving power in a cell set by the access network equipment, and comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

12. A method of calculating uplink transmit power, the method being applied to an access network device, comprising:

acquiring the gain difference compensation quantity of uplink and downlink antennas of access network equipment;

And sending the uplink and downlink antenna gain difference compensation quantity of the access network equipment to the terminal equipment, so that the terminal equipment can determine uplink sending power according to the uplink and downlink antenna gain difference compensation quantity of the access network equipment.

13. The method of claim 12, wherein the obtaining the uplink and downlink antenna gain difference compensation amount of the access network device comprises:

14. The method of claim 13, wherein the determining the uplink and downlink antenna gain difference compensation amount of the access network device according to the downlink antenna gain and the uplink antenna gain of the access network device comprises:

calculating the gain difference compensation quantity of the uplink antenna and the downlink antenna of the access network equipment according to the formula (5):

15. The method according to any one of claims 12 to 14, further comprising:

and transmitting the expected receiving power of the uplink signal to the terminal equipment, wherein the expected receiving power of the uplink signal comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

16. The method according to any one of claims 12 to 15, further comprising:

and transmitting preset receiving power to the terminal equipment, wherein the preset receiving power is the receiving power in a cell set by the access network equipment, and the preset receiving power comprises an uplink and downlink frequency difference compensation amount and an uplink and downlink antenna gain difference compensation amount of the access network equipment.

17. The method according to claim 15 or 16, characterized in that the method further comprises:

18. A communication device, comprising:

comprising a processor and a memory storing a computer program, wherein the computer program is executed by the processor to cause the communication device to perform the method of any of claims 1 to 11.

19. A communication device, comprising:

comprising a processor and a memory storing a computer program, wherein the computer program is executed by the processor to cause the communication device to perform the method of any of claims 12 to 17.

20. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, which, when executed, implements a method of calculating uplink transmission power according to any one of claims 1 to 11, or a method of calculating uplink transmission power according to any one of claims 12 to 17.

21. A chip, comprising a processor and an interface;

the processor is configured to read instructions to implement a method of switching between different modes of operation according to any one of claims 1 to 11, or a method of calculating uplink transmit power according to any one of claims 12 to 17.