CN115514463A

CN115514463A - Method and device for detecting channel

Info

Publication number: CN115514463A
Application number: CN202110877940.9A
Authority: CN
Inventors: 刘云
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-22
Filing date: 2021-07-30
Publication date: 2022-12-23
Also published as: WO2022267604A1

Abstract

The application provides an information detection method and device, which can improve the reliability of channel detection. The method comprises the following steps: the terminal equipment sends a first DMRS to the network equipment in a first time unit where a first channel is located; the terminal device cancels at least one first symbol in a second time unit to send a second signal to the network device, wherein the second time unit is after the first time unit and the second time unit is continuous with the first time unit; or, the terminal device determines that at least one second symbol in a second time unit transmits a fourth signal to the network device, wherein the fourth signal is determined according to the first DMRS; and the terminal equipment sends a second DMRS to the network equipment in a third time unit in which a third channel is positioned, wherein the first DMRS is related to the second DMRS, and the third time unit is behind the second time unit and is continuous with the second time unit.

Description

Method and device for detecting channel

The present application claims priority from the patent application entitled "a method enabling joint channel detection" filed by the chinese patent office on 22/06/22/2021 with application number 20211069851.0, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for channel detection.

Background

In a communication system, there are downlink transmission from a base station to a User Equipment (UE) and uplink transmission from the UE to the base station, and the coverage of the downlink transmission is generally higher than that of the uplink transmission, so research on coverage enhancement mainly focuses on how to improve the coverage of the uplink transmission.

The uplink transmission generally includes a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH), where the PUCCH belongs to the control channel and has a relatively wide coverage area, and the PUSCH belongs to the data channel and has a large amount of transmission information and a relatively close coverage area. On both PUCCH and PUSCH channels, there is a resource location of a demodulation reference signal (DMRS).

One scheme for PUSCH and PUCCH channel coverage enhancement is to increase repetition, with more repetition in the time domain to achieve the effect of channel enhancement. When the DMRSs carried by each repetition are in the same frequency domain position while the DMRSs carried by each repetition are repeated in the time domain, joint channel estimation may be performed in combination with the DMRS signals on each repetition. At present, in the standard study, it is expected to use DMRSs on two channels for joint channel estimation or DMRSs on two repetitions of one channel for joint channel estimation, thereby improving the coverage. However, in practical applications, there are other uplink transmissions for covering the symbols between the two enhanced channels, and if the frequency domain resources of the other uplink transmissions are different from the frequency domain resources of the two channels, the continuity of the phase and amplitude of the DMRS on the latter channel and the DMRS on the former channel cannot be ensured, in which case, joint channel estimation cannot be performed.

Disclosure of Invention

The application provides a channel detection method and device, which can improve the reliability of channel detection.

In a first aspect, a method for channel detection is provided, which may be performed by a chip or a chip system on a terminal device or a terminal side. The method comprises the following steps: the terminal equipment sends a first demodulation reference signal (DMRS) to the network equipment in a first time unit where a first channel is located; the terminal device canceling at least one first symbol in a second time unit from sending a second signal to the network device, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit; alternatively, the terminal device determines that at least one second symbol in the second time unit transmits a fourth signal to the network device, the fourth signal being determined according to the first DMRS; and the terminal equipment transmits a second DMRS to the network equipment in a third time unit in which a third channel is positioned, wherein the first DMRS is related to the second DMRS, and the third time unit is behind the second time unit and is continuous with the second time unit.

Based on the technical scheme, the terminal equipment sends a first DMRS to the network equipment in a first time unit where a first channel is located, and sends a second DMRS to the network equipment in a third time unit where a third channel is located; the terminal equipment cancels at least one first symbol in a second time unit between the first time unit and a third time unit to send a second signal to the network equipment, or the terminal equipment sends a fourth signal to the network equipment in at least one second symbol in the second time unit between the first time unit and the third time unit, wherein a physical resource block occupied by the at least one second symbol is the same as a physical resource block occupied by the first time unit, and/or a difference between the power of the fourth signal and the power of the first DMRS is smaller than or equal to a third preset value; continuity of the phases and amplitudes of the first and second DMRSs may be ensured, so that reliability of channel detection may be improved.

With reference to the first aspect, in certain implementations of the first aspect, the cancelling transmission of the second signal to the network device by the terminal device over at least one first symbol in a second time unit includes: the terminal equipment cancels the transmission of the second signal to the network equipment by each first symbol in the second time unit.

With reference to the first aspect, in certain implementations of the first aspect, the cancelling the transmission of the second signal to the network device by the terminal device over at least one first symbol in a second time unit includes: the terminal device cancels each first symbol in the N symbols in the second time unit to send the second signal to the network device, the N symbols are consecutive, and a last symbol in the N symbols is consecutive to a first symbol in the third time unit, wherein the second time unit includes M symbols, M is greater than N, and N and M are positive integers.

With reference to the first aspect, in certain implementation manners of the first aspect, the N is determined by the terminal device according to capability information of the terminal device, or the N is determined by the terminal device according to parameter information configured by the network device.

Based on the above scheme, uplink transmission is not performed on N symbols before the third time element, so that the terminal device can perform local oscillator retuning on the symbols, thereby maintaining continuity between the phase and amplitude of the second DMRS and the first DMRS transmitted in the third time element.

With reference to the first aspect, in certain implementation manners of the first aspect, the first channel and the third channel are a physical uplink shared channel, PUSCH, or a physical uplink control channel, PUCCH.

With reference to the first aspect, in some implementations of the first aspect, when the terminal device cancels sending of the second signal to the network device in at least one first symbol in a second time unit, a second channel is located in the second time unit, the second channel is a physical uplink control channel, PUCCH, and a priority of the PUCCH is lower than or equal to a priority of the first channel and/or a priority of the third channel.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and the terminal equipment sends Uplink Control Information (UCI) to be carried on the PUCCH on the first channel and/or the third channel.

With reference to the first aspect, in certain implementations of the first aspect, the format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2.

With reference to the first aspect, in certain implementation manners of the first aspect, the first channel and the third channel are PUCCHs, and formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4.

With reference to the first aspect, in certain implementation manners of the first aspect, the second signal and/or the fourth signal are sounding reference signals, SRS, and/or the priority of the first channel and the third channel is higher than a first threshold when the terminal device cancels sending of the second signal to the network device in at least one first symbol in a second time unit.

With reference to the first aspect, in certain implementations of the first aspect, the correlating the first DMRS with the second DMRS includes: the phase difference between the first DMRS and the second DMRS is smaller than or equal to a first preset value, and the amplitude difference between the first DMRS and the second DMRS is smaller than or equal to a second preset value.

With reference to the first aspect, in certain implementations of the first aspect, the fourth signal is determined according to the first DMRS, and includes: the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit satisfy a first preset condition, and/or the power of the fourth signal and the power of the first DMRS satisfy a second preset condition.

With reference to the first aspect, in certain implementations of the first aspect, the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or the same size as a physical resource block occupied by the first time unit; the second preset condition includes that a difference between the power of the fourth signal and the power of the first DMRS is less than or equal to a third preset value.

With reference to the first aspect, in some implementations of the first aspect, the first channel and the third channel are two transmissions of the same channel, or the first channel and the third channel are different channels.

In a second aspect, a method of channel detection is provided, which may be performed by a network device or a chip or a system of chips on the network device side. The method comprises the following steps: the method comprises the steps that network equipment receives a first demodulation reference signal (DMRS) sent by terminal equipment in a first time unit where a first channel is located; the network device cancelling reception of a second signal in at least one first symbol in a second time unit, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit; or, the network device receives a fourth signal transmitted by the terminal device in at least one second symbol in the second time unit, the fourth signal being determined according to the first DMRS; the network equipment receives a second DMRS sent by the terminal equipment in a third time unit in which a third channel is located, wherein the first DMRS is related to the second DMRS, and the third time unit is behind the second time unit and is continuous with the second time unit; and the network equipment performs channel detection according to the first DMRS and the second DMRS.

Based on the technical scheme, the network equipment receives a first DMRS sent by the terminal equipment in a first time unit where a first channel is located, and receives a second DMRS sent by the terminal equipment in a third time unit where a third channel is located; the network equipment cancels at least one first symbol in a second time unit between the first time unit and a third time unit to receive a second signal, or the network equipment receives a fourth signal sent by the terminal equipment in at least one second symbol in a second time unit between the first time unit and the third time unit, the physical resource block occupied by the at least one second symbol is the same as the physical resource block occupied by the first time unit, and/or the difference between the power of the fourth signal and the power of the first DMRS is smaller than or equal to a third preset value; the phases and amplitudes of the first and second DMRSs have continuity, and thus, reliability of channel detection may be improved.

With reference to the second aspect, in certain implementations of the second aspect, the network device cancelling reception of the second signal in at least one first symbol in a second time unit includes: the network device cancels receiving the second signal in every first symbol in the second time unit.

With reference to the second aspect, in certain implementations of the second aspect, the network device cancelling reception of the second signal in at least one first symbol in a second time unit includes: the network device cancels each first symbol of N symbols in a second time unit to receive a second signal, the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of the third time unit, wherein the second time unit comprises M symbols, M is greater than N, and N and M are positive integers.

With reference to the second aspect, in certain implementations of the second aspect, the first channel and the third channel are a physical uplink shared channel, PUSCH, or a physical uplink control channel, PUCCH.

With reference to the second aspect, in certain implementations of the second aspect, when the network device cancels receiving of a second signal in at least one first symbol in a second time unit, a second channel is located in the second time unit, the second channel is a physical uplink control channel, PUCCH, and a priority of the PUCCH is lower than or equal to a priority of the first channel and/or a priority of the third channel.

With reference to the second aspect, in some implementations of the second aspect, the network device receives uplink control information, UCI, to be carried on the PUCCH on the first channel and/or the third channel.

With reference to the second aspect, in some implementations of the second aspect, the format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2.

With reference to the second aspect, in certain implementation manners of the second aspect, the first channel and the third channel are PUCCHs, and the formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4.

With reference to the second aspect, in certain implementations of the second aspect, the second signal and/or the fourth signal is a sounding reference signal, SRS, and/or the priority of the first channel and the third channel is higher than a first threshold when the network device cancels receiving of the second signal in at least one first symbol in a second time unit.

With reference to the second aspect, in certain implementations of the second aspect, the first DMRS is related to the second DMRS, including: the phase difference between the first DMRS and the second DMRS is less than or equal to a first preset value, and the amplitude difference between the first DMRS and the second DMRS is less than or equal to a second preset value.

With reference to the second aspect, in certain implementations of the second aspect, the fourth signal is determined based on the first DMRS, and includes: the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit satisfy a first preset condition, and/or the power of the fourth signal and the power of the first DMRS satisfy a second preset condition.

With reference to the second aspect, in certain implementations of the second aspect, the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or the same size as a physical resource block occupied by the first time unit; the second preset condition includes that a difference between the power of the fourth signal and the power of the first DMRS is less than or equal to a third preset value. With reference to the second aspect, in some implementations of the second aspect, the first channel and the third channel are two transmissions of the same channel, or the first channel and the third channel are different channels.

In a third aspect, a communication apparatus is provided, including: a sending unit, configured to send a first demodulation reference signal DMRS to a network device in a first time unit in which a first channel is located; a determining unit configured to cancel sending a second signal to the network device for at least one first symbol in a second time unit, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit; or, to determine that at least one second symbol in the second time unit transmits a fourth signal to the network device, the fourth signal determined according to the first DMRS; the transmitting unit is further configured to transmit, to the network device, a second DMRS in a third time cell in which a third channel is located, where the first DMRS is related to the second DMRS, and the third time cell is after the second time cell and the third time cell is contiguous to the second time cell.

With reference to the third aspect, in certain implementations of the third aspect, the determining unit is specifically configured to cancel sending the second signal to the network device for each first symbol in the second time unit.

With reference to the third aspect, in some implementations of the third aspect, the determining unit is specifically configured to cancel each first symbol of N symbols in the second time unit from transmitting the second signal to the network device, where the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of the third time unit, where the second time unit includes M symbols, M is greater than N, and N and M are positive integers.

With reference to the third aspect, in certain implementations of the third aspect, the N is determined by the terminal device according to capability information of the terminal device, or the N is determined by the terminal device according to parameter information configured by the network device.

With reference to the third aspect, in some implementation manners of the third aspect, the first channel and the third channel are a physical uplink shared channel, PUSCH, or a physical uplink control channel, PUCCH.

With reference to the third aspect, in certain implementations of the third aspect, the determining unit is configured to cancel sending a second signal to the network device in at least one first symbol in a second time unit, where a second channel is located in the second time unit, the second channel is a Physical Uplink Control Channel (PUCCH), and a priority of the PUCCH is lower than or equal to a priority of the first channel and/or a priority of the third channel.

With reference to the third aspect, in some implementations of the third aspect, the sending unit is further configured to send, on the first channel and/or the third channel, uplink control information UCI to be carried on the PUCCH.

With reference to the third aspect, in some implementations of the third aspect, the format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2.

With reference to the third aspect, in certain implementation manners of the third aspect, the first channel and the third channel are PUCCHs, and formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4.

With reference to the third aspect, in certain implementation manners of the third aspect, the second signal and/or the fourth signal are sounding reference signals, SRSs, and/or the determining unit is configured to cancel that, when at least one first symbol in a second time unit transmits a second signal to the network device, the priority of the first channel and the priority of the third channel are higher than a first threshold.

With reference to the third aspect, in certain implementations of the third aspect, the correlating the first DMRS with the second DMRS includes: the phase difference between the first DMRS and the second DMRS is smaller than or equal to a first preset value, and the amplitude difference between the first DMRS and the second DMRS is smaller than or equal to a second preset value.

With reference to the third aspect, in certain implementations of the third aspect, the fourth signal is determined based on the first DMRS, and includes: the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit satisfy a first preset condition, and/or the power of the fourth signal and the power of the first DMRS satisfy a second preset condition.

With reference to the third aspect, in certain implementations of the third aspect, the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or the same size as a physical resource block occupied by the first time unit; the second preset condition includes that a difference between the power of the fourth signal and the power of the first DMRS is less than or equal to a third preset value.

With reference to the third aspect, in some implementations of the third aspect, the first channel and the third channel are two transmissions of the same channel, or the first channel and the third channel are different channels.

In a fourth aspect, a communication apparatus is provided, including: a receiving unit, configured to receive, at a first time unit where a first channel is located, a first demodulation reference signal DMRS sent by a terminal device; a determining unit configured to cancel reception of a second signal in at least one first symbol in a second time unit, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit; or, determining to receive a fourth signal transmitted by the terminal device in at least one second symbol in the second time unit, the fourth signal being determined according to the first DMRS; the receiving unit is further configured to receive, at a third time unit in which a third channel is located, a second DMRS sent by the terminal device, where the first DMRS is related to the second DMRS, and the third time unit is after the second time unit and is consecutive to the second time unit; and the processing unit is used for carrying out channel detection according to the first DMRS and the second DMRS.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the determining unit is specifically configured to cancel receiving the second signal for each first symbol in the second time unit.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the determining unit is specifically configured to cancel each first symbol of N symbols in a second time unit from receiving the second signal, where the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of the third time unit, where the second time unit includes M symbols, M is greater than N, and N and M are positive integers.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first channel and the third channel are a physical uplink shared channel, PUSCH, or a physical uplink control channel, PUCCH.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the determining unit is configured to cancel, when receiving a second signal in at least one first symbol in a second time unit, a second channel located in the second time unit, where the second channel is a physical uplink control channel, PUCCH, and a priority of the PUCCH is lower than or equal to a priority of the first channel and/or a priority of the third channel.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to receive uplink control information, UCI, to be carried on the PUCCH on the first channel and/or the third channel.

With reference to the fourth aspect, in some implementations of the fourth aspect, the format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first channel and the third channel are PUCCHs, and the formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second signal and/or the fourth signal is a sounding reference signal, SRS, and/or the determining unit is configured to cancel, when receiving a second signal in at least one first symbol in a second time unit, a priority of the first channel and the third channel is higher than a first threshold.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the correlating the first DMRS with the second DMRS includes: the phase difference between the first DMRS and the second DMRS is smaller than or equal to a first preset value, and the amplitude difference between the first DMRS and the second DMRS is smaller than or equal to a second preset value.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the fourth signal is determined based on the first DMRS, and includes: the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit satisfy a first preset condition, and/or the power of the fourth signal and the power of the first DMRS satisfy a second preset condition.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or the same size as a physical resource block occupied by the first time unit; the second preset condition includes that a difference between the power of the fourth signal and the power of the first DMRS is less than or equal to a third preset value.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first channel and the third channel are two transmissions of the same channel, or the first channel and the third channel are different channels.

In a fifth aspect, a communication device is provided, comprising: a processor and a transceiver for receiving computer code or instructions and transmitting the computer code or instructions to the processor, the processor executing the computer code or instructions, such as the first aspect or the method in any possible implementation manner of the first aspect.

In a sixth aspect, there is provided a communication device comprising: a processor and a transceiver for receiving computer code or instructions and transmitting the computer code or instructions to the processor, the processor executing the computer code or instructions, such as the second aspect or the method in any possible implementation of the second aspect.

In a seventh aspect, a computer-readable storage medium is provided, the computer-readable medium storing a computer program; the computer program, when executed on a computer, causes the computer to perform the method of any one of the possible implementations of the first aspect and the first aspect described above.

In an eighth aspect, there is provided a computer-readable storage medium storing a computer program; the computer program, when executed on a computer, causes the computer to perform the method of any of the second aspects described above and possible implementations of the second aspect.

A ninth aspect provides a computer program product comprising instructions which, when executed by a computer, cause the communication apparatus to carry out the method of the first aspect as well as any one of the possible implementations of the first aspect.

A tenth aspect provides a computer program product comprising instructions that, when executed by a computer, cause a communication apparatus to implement the method of the second aspect described above and any possible implementation manner of the second aspect.

Drawings

Fig. 1 is a schematic diagram of transmissions between a UE and a base station.

Fig. 2 is a schematic diagram of the existence of unoccupied symbols between channel 1 and channel 2.

Fig. 3 is a schematic flow chart of a method for channel detection according to an embodiment of the present application.

Fig. 4 is a schematic diagram of cancelling each first symbol in a second time unit from transmitting a second signal to the network device.

Fig. 5 is another illustration of canceling each first symbol in a second time cell from transmitting a second signal to a network device.

Fig. 6 is a schematic diagram of a method for canceling each of N symbols in a second time unit from transmitting a second signal to a network device.

Fig. 7 is another illustration of canceling each of the N symbols in the second time cell from transmitting the second signal to the network device.

Fig. 8 is a schematic diagram of cancelling at least one first symbol in a second time unit from transmitting a second signal to a network device.

Fig. 9 is a schematic flow chart of another channel detection method proposed in the embodiment of the present application.

Fig. 10 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of another communication apparatus according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication device according to an embodiment of the present application.

Detailed Description

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

The embodiments of the present application can be applied to various communication systems, such as Wireless Local Area Network (WLAN), narrowband internet of things (NB-IoT), global system for mobile communications (GSM), enhanced data rate GSM evolution (EDGE), wideband Code Division Multiple Access (WCDMA), code division multiple access (code division multiple access, CDMA 2000), time division synchronous code division multiple access (TD-SCDMA), long term evolution (long term evolution, LTE), satellite communication, fifth generation (5 g), or future communication systems.

A communication system suitable for use in the present application includes one or more transmitting ends and one or more receiving ends. The signal transmission between the sending end and the receiving end can be through radio wave transmission, or through transmission media such as visible light, laser, infrared and optical fiber.

Illustratively, one of the sending end and the receiving end may be a terminal device, and the other may be a network device. Both the transmitting end and the receiving end may be terminal devices, for example.

The terminal devices referred to in the embodiments of the present application may include various handheld devices, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capability. The terminal may be a Mobile Station (MS), a subscriber unit (subscriber unit), a User Equipment (UE), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (handset), a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal, or the like. Wherein the user device comprises a vehicle user device.

Illustratively, the network device may be an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (BBU), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a Transmission and Reception Point (TRP), etc., may also be a gNB or a transmission point (e.g., TRP or TP) in a New Radio (NR), one or a group (including multiple) of antenna panels of a base station in the NR, or may also be a network Node forming the gNB or the transmission point, such as a baseband unit (BBU) or a Distributed Unit (DU), etc., or the network device may also be a vehicle-mounted device, a wearable device, and a network device in a 5G network, or a network device in a PLMN network that evolves in the future, etc., without limitation.

The product form of the network equipment is very rich. For example, during product implementation, the BBU may be integrated with a Radio Frequency Unit (RFU) within the same device that is connected to the antenna array by a cable (e.g., without limitation, a feeder). The BBU may also be located separately from the RFU, with optical fiber connections therebetween, and communicate via, for example, but not limited to, common Public Radio Interface (CPRI) protocols. In this case, the RFU is generally called a Remote Radio Unit (RRU), which is connected to the antenna array by a cable. Furthermore, the RRU may be integrated with an antenna array, for example, an Active Antenna Unit (AAU) product currently on the market adopts this structure.

In addition, the BBU may be further broken down into multiple parts. For example, the BBU may be further subdivided into a Centralized Unit (CU) and a Distributed Unit (DU) according to the real-time performance of the processed traffic. CUs are responsible for handling non-real time protocols and services and DUs are responsible for handling physical layer protocols and real time services. Furthermore, part of the physical layer functions can be separated from the BBU or DU and integrated in the AAU.

The New Radio (NR) of 5G is a new topic proposed by the third generation partnership project (3 rd generation partnership project,3 gpp) organization, and is located in release 14. In the last 10 years, the LTE standard proposed by the 3GPP organization has been widely used throughout the world, referred to as 4G communication technology. For example, china mobile, china unicom, and china telecom have adopted 4G LTE Time Division Duplexing (TDD) and Frequency Division Duplexing (FDD) mode transmission technologies, respectively, and provide fast and convenient mobile network services for users.

And as the new generation 5G technology enters the discussion phase, does the system architecture and access procedures that have been achieved in the original 4G LTE continue to be adopted? On the one hand, since communication systems are latter-compatible, new technologies developed later tend to be compatible with the technologies that have been previously standardized; on the other hand, since 4G LTE already has a lot of existing designs, if compatibility is achieved, much of the flexibility of 5G must be sacrificed, thereby reducing performance. Therefore, two directions are currently being investigated in parallel in the 3GPP organization, without regard to the backward compatible technical discussion group, called 5G NR.

In a communication system, there are downlink transmission from a base station to a UE and uplink transmission from the UE to the base station, and because the cost of the base station is relatively high, the coverage of the downlink transmission is generally higher than that of the uplink transmission. Because only a relatively cheap power amplifier can be used due to cost limitation factors on the UE side, the upper power limit is also relatively low on the base station side, and therefore, studies on coverage enhancement mainly focus on how to improve the coverage of uplink transmission. As shown in fig. 1, a schematic diagram of transmission between a UE and a base station is shown.

One scheme for PUSCH and PUCCH channel coverage enhancement is to increase repetition, with more repetition in the time domain to achieve the effect of channel enhancement. When the DMRS carried by the repetition is in the same frequency domain position every time, the combined channel estimation can be carried out by combining the DMRS signals on the repetition, thereby achieving the effect of more accurately estimating the channel. The covering condition of the PUSCH or PUCCH channel can be improved through more accurate channel estimation.

In the standard study, the DMRSs on two channels are expected to be used for joint channel estimation or the DMRSs on two repetitions of one channel are expected to be used for joint channel estimation, thereby improving the coverage. As shown in fig. 2, a schematic diagram of unoccupied symbols existing between channel 1 and channel 2 is shown, where channel 1 and channel 2 may be PUCCH or PUSCH, and these unoccupied symbols may be used for other channel transmission or may be in an idle state. Such a scenario is referred to as a non-back-to-back PUCCH (non-back-to-back PUCCH) or a non-back-to-back PUSCH (non-back-to-back PUSCH) in the standard.

When the PUSCH repetition or the PUCCH repetition is scheduled, if no other uplink transmission exists between the two channels (the channel 1 and the channel 2), the repeated scheduling is carried out on the resources, so that the continuity of the phase and the amplitude of the DMRS on the channel 1 and the channel 2 can be kept, namely, the DMRS signal on the channel 1 and the DMRS signal on the channel 2 can be used for joint channel estimation. It should be understood that channel 1 and channel 2 may also be two repetitions of one channel.

However, there are many limitations in the application scenario where there is no other uplink transmission between two channels for coverage enhancement, and in practical applications, there are other uplink transmissions for symbols between two channels for coverage enhancement. For example, a base station typically schedules a Sounding Reference Signal (SRS) on the last symbol or symbols of a slot for the base station to measure the quality of an uplink channel. The SRS configuration has two conditions of periodicity and non-periodicity, and the base station informs the terminal equipment through configuration information. Also for example, PUCCH transmission is performed in a symbol between two channels. At this time, if the frequency domain resources of the SRS or the PUCCH and the frequency domain resources of the two channels are different, the continuity of the phase and the amplitude of the DMRS on the latter channel and the DMRS on the former channel cannot be ensured, and in this case, joint channel estimation cannot be performed.

In order to achieve the purpose, the application provides a channel detection method, wherein terminal equipment sends a first DMRS to network equipment in a first time unit where a first channel is located; the terminal equipment cancels at least one first symbol in a second time unit to send a second signal to the network equipment, wherein the second time unit is behind the first time unit and is continuous with the first time unit; or the terminal device determines that at least one second symbol in the second time unit transmits a fourth signal to the network device, wherein the fourth signal is determined according to the first DMRS; and the terminal equipment sends a second DMRS to the network equipment in a third time unit where a third channel is located, the first DMRS is related to the second DMRS, the third time unit is behind the second time unit and is continuous with the second time unit, and the network equipment carries out channel detection according to the first DMRS and the second DMRS. The method can improve the reliability of channel detection.

As shown in fig. 3, a schematic flow chart of a method 300 for channel detection proposed in the embodiment of the present application is shown.

And 310, the terminal equipment transmits the first DMRS to the network equipment in the first time unit of the first channel. The network device may be a base station. Correspondingly, the network device receives the first DMRS sent by the terminal device in the first time unit in which the first channel is located.

The terminal device cancels at least one first symbol in a second time unit, subsequent to the first time unit and consecutive to the first time unit, from transmitting a second signal to the network device 320. The first symbol is a symbol originally transmitted in uplink in the second time unit. Correspondingly, the network device may cancel receiving the second signal in at least one first symbol in the second time unit. Optionally, the network device may also receive the second signal in at least one first symbol in the second time unit, but the network device does not receive the second signal.

330, the terminal device sends the second DMRS to the network device in a third time cell in which the third channel is located, where the first DMRS is related to the second DMRS, and the third time cell is after the second time cell and the third time cell is consecutive to the second time cell. The network device may perform joint channel estimation based on the received first and second DMRSs. Correspondingly, the network device receives the second DMRS sent by the terminal device in a third time unit in which the third channel is located. And the network equipment performs channel detection according to the first DMRS and the second DMRS.

Specifically, the first DMRS is related to the second DMRS, and it is understood that a phase difference between the first DMRS and the second DMRS is less than or equal to a first preset value, and an amplitude difference between the first DMRS and the second DMRS is less than or equal to a second preset value. The first preset value and the second preset value may be predefined, may also be determined and indicated to the terminal device by the network device (base station), and may also be preset inside the terminal device, without limitation.

The first channel and the third channel may be physical uplink shared channels PUSCH, and the first channel and the third channel may also be physical uplink control channels PUCCH. Optionally, the first channel and the third channel may be two repetitions of the same channel, for example, the first channel and the third channel may be two repetitions of the same PUSCH, or the first channel and the third channel may be two repetitions of the same PUCCH; the first channel and the third channel may also be different channels, for example, the first channel and the third channel may be PUSCHs carrying different transport blocks, or the first channel and the third channel may be PUCCHs carrying different transport blocks.

In this embodiment, the terminal device may cancel sending the second signal to the network device for each first symbol in the second time unit, or may cancel sending the second signal to the network device for a part of the first symbols in the second time unit. And determining whether to map the cancelled information carried by the second signal to be transmitted in the first symbol to the first channel and/or the third channel for transmission according to some conditions, which may be considered including but not limited to PUCCH format, PUCCH priority, information type carried by PUCCH, symbol position/range occupied by PUCCH, number of PUCCH symbols, number of first symbols remaining after cancellation of part of the first symbol, etc.

In one implementation, the terminal device may cancel sending the second signal to the network device for each first symbol in the second time unit to ensure that all symbols in the second time unit are unoccupied or have no uplink transmission. Correspondingly, the network device cancels the reception of the second signal in each first symbol of the second time unit.

As shown in fig. 4, a schematic diagram is shown for canceling each first symbol in the second time unit from transmitting the second signal to the network device. Taking the example that the second time unit includes 6 symbols, if the second symbol and the fourth symbol in the second time unit are symbols originally having uplink transmission, the second symbol and the fourth symbol are cancelled to send the second signal to the network device. In this case, the second symbol and the fourth symbol are referred to as the first symbol.

As shown in fig. 5, another schematic diagram is shown for canceling each first symbol in the second time unit from transmitting the second signal to the network device. Taking the example that the second time unit includes 6 symbols, if the first to sixth symbols in the second time unit are original uplink transmission symbols, the sending of the second signal to the network device at the first to sixth symbols is cancelled. In this case, the first symbol, the second symbol, the third symbol, the fourth symbol, the fifth symbol, and the sixth symbol are referred to as a first symbol.

Illustratively, the second channel is located in a second time unit, and the second channel is a physical uplink control channel, PUCCH. When the priority of the PUCCH (second channel) is lower than or equal to the priority of the first channel, the terminal device cancels every first symbol in the second time unit from transmitting the second signal to the network device. Alternatively, when the priority of the PUCCH (second channel) is lower than or equal to the priority of the third channel, the terminal device cancels every first symbol in the second time unit from transmitting the second signal to the network device. Alternatively, when the priority of the PUCCH (second channel) is lower than or equal to the priority of the first channel and the priority of the third channel, the terminal device cancels every first symbol in the second time unit from transmitting the second signal to the network device. The first channel and the third channel may be PUCCH or PUSCH.

Optionally, the terminal device may send Uplink Control Information (UCI) to be carried on a PUCCH (second channel) on the first channel, or may send UCI to be carried on the PUCCH on the third channel, or may send UCI to be carried on the PUCCH on the first channel and the third channel. For example, uplink control information carried by the PUCCH may be multiplexed (UCI multiplex) onto the first channel and/or the third channel. Therefore, information loss caused by canceling uplink transmission in the second time unit can be avoided, and the reliability of UCI information transmission is ensured.

Optionally, when the PUCCH format adopted by the second channel is PUCCH format (format) 0, PUCCH format 1, or PUCCH format 2, the UCI to be carried on the second channel may be mapped (multiplexed) to the first channel and/or the third channel for transmission. Because when the PUCCH format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2, fewer bits (bits) are occupied by the UCI, the first channel and the third channel can carry the bits; when the PUCCH format used by the second channel is PUCCH format 3 or PUCCH format 4, the UCI occupies more bits, and the first channel and the third channel may not carry too many bits.

Optionally, the first channel and the third channel may be PUCCHs, and if PUCCH formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4, UCI to be carried on the second channel may be mapped to the first channel and/or the third channel for transmission. Since PUCCH format 3 or PUCCH format 4 can carry more bits.

When the priority of the PUCCH (second channel) is higher than or equal to the priority of the first channel and the priority of the third channel, the terminal device does not cancel sending the second signal to the network device by each first symbol in the second time unit, that is, the terminal device sends the second signal to the network device by each first symbol in the second time unit, so that transmission of a relatively important (high-priority) signal can be ensured, and at this time, the base station does not perform joint channel estimation. When the priority of the PUCCH (second channel) is higher than or equal to the priority of the first channel and the priority of the third channel, it may also cancel sending the second signal to the network device by each first symbol in the second time unit, and map the UCI to be carried on the PUCCH to the first channel and/or the third channel for transmission, which is beneficial for the base station to perform joint channel estimation. This is not particularly limited in the embodiments of the present application.

Exemplarily, when the second signal is the sounding reference signal SRS, the terminal device cancels every first symbol in the second time unit to transmit the second signal to the network device. Or, when the priority of the first channel and the third channel is higher than or equal to the first threshold value, the terminal equipment cancels each first symbol in the second time unit to send the second signal to the network equipment. Or, when the second signal is the sounding reference signal SRS and the priorities of the first channel and the third channel are higher than or equal to the first threshold, the terminal device cancels each first symbol in the second time unit from transmitting the second signal to the network device. For example, the first threshold value is 0, and when the priority of the first channel and the priority of the third channel are 1, the terminal device cancels every first symbol in the second time unit to send the second signal to the network device; when the priority of the first channel and the third channel is 0, the terminal device may transmit the second signal to the network device at the first symbol in the second time unit. For another example, the first threshold is 0, and when the second signal is a sounding reference signal SRS, and the priority of the first channel and the priority of the third channel are 1, the SRS transmission is cancelled; when the second signal is the sounding reference signal SRS, and the priority of the first channel and the third channel is 0, only SRS transmission on a part of the first symbol may be cancelled, or SRS transmission may not be cancelled.

In another implementation, the terminal device may cancel each first symbol of N symbols in a second time unit from transmitting the second signal to the network device, where the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of a third time unit, where the second time unit includes M symbols, M is greater than or equal to N, and N and M are positive integers. The N symbols are the number of symbols required for the terminal device to perform local oscillator resetting (LO resetting), and may also be understood as the number of symbols required for the terminal device to adjust the phase and amplitude of the uplink transmission signal.

Wherein, N may be determined by the terminal device according to the capability information of the terminal device itself, or N may be determined by the terminal device according to parameter information configured by the network device through Radio Resource Control (RRC) signaling. And uplink transmission is not performed on the N symbols before the third time element, so that the terminal device can perform local oscillator retuning on the symbols, thereby maintaining continuity of the phases and amplitudes of the second DMRS and the first DMRS transmitted in the third time element.

It should be understood that when the number of symbols M included in the second time unit is less than or equal to N, the terminal device cancels each first symbol in the second time unit from transmitting the second signal to the network device. Correspondingly, the network device cancels each first symbol of the N symbols in the second time unit from receiving the second signal.

Optionally, when the base station determines that there is no uplink transmission or downlink transmission of the terminal device on N symbols in a second time unit between the first time unit and the third time unit, the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of the third time unit, the base station may perform joint channel estimation according to a first DMRS sent by the terminal device in the first time unit where the first channel is located and a second DMRS sent by the terminal device in the third time unit where the third channel is located; otherwise, the base station cannot perform joint channel estimation.

Optionally, when the base station determines that each symbol in a second time unit between the first time unit and the third time unit has no uplink transmission or downlink transmission of the terminal device, the base station may perform joint channel estimation according to a first DMRS sent by the terminal device in the first time unit in which the first channel is located and a second DMRS sent by the terminal device in the third time unit in which the third channel is located; otherwise, the base station cannot perform joint channel estimation.

As shown in fig. 6, a schematic diagram is shown for canceling each of the N symbols in the second time unit from transmitting the second signal to the network device. Suppose N equals 3 and m equals 6. And if the second symbol and the fourth symbol in the second time unit are the original symbols with uplink transmission, canceling to send a second signal to the network equipment at the fourth symbol. In this case, the second symbol and the fourth symbol are referred to as the first symbol.

As shown in fig. 7, a schematic diagram is shown for canceling each of the N first symbols in the second time unit from transmitting the second signal to the network device. Suppose N equals 3 and M equals 6. And if the first symbol to the sixth symbol in the second time unit are the original symbols with uplink transmission, canceling to send the second signal to the network equipment from the fourth symbol to the sixth symbol. In this case, the first symbol, the second symbol, the third symbol, the fourth symbol, the fifth symbol, and the sixth symbol are referred to as a first symbol.

Exemplarily, the second channel is located in a second time unit, and the second channel is a physical uplink control channel PUCCH. When the priority of the PUCCH (second channel) is lower than or equal to the priority of the first channel, the terminal device cancels each of the N first symbols in the second time unit from transmitting the second signal to the network device. Alternatively, when the priority of the PUCCH (second channel) is lower than or equal to the priority of the third channel, the terminal device cancels each of the N first symbols in the second time unit from transmitting the second signal to the network device. Alternatively, when the priority of the PUCCH (second channel) is lower than or equal to the priority of the first channel and the priority of the third channel, the terminal device cancels each of the N first symbols in the second time unit from transmitting the second signal to the network device. The first channel and the third channel may be two repetitions of the same PUCCH, and may also be two repetitions of the same PUSCH; the first channel and the third channel may also be different channels, for example, the first channel and the third channel may be PUSCHs carrying different transport blocks, or the first channel and the third channel may be PUCCHs carrying different transport blocks.

Optionally, the terminal device may send the UCI to be carried on the PUCCH (second channel) on the first channel, or may send the UCI to be carried on the PUCCH on the third channel, or may send the UCI to be carried on the PUCCH on the first channel and the third channel. That is, uplink control information carried by the PUCCH may be multiplexed (UCI multiplex) onto the first channel and/or the third channel. Therefore, the information loss caused by canceling the uplink transmission in the second time unit can be avoided, and the reliability of UCI information transmission is ensured. Optionally, the UCI sent on the first channel and/or the third channel may be a UCI to be carried on each of the N symbols in the second time unit, or may be a UCI to be carried on each of the N symbols in the second time unit. It should be understood that, when the UCI transmitted on the first channel and/or the third channel is the UCI to be carried on each of the N symbols in the second time unit, since the UCI to be carried on the symbols other than the N symbols in the second time unit is not cancelled, the UCI to be carried on the symbols other than the N symbols in the second time unit need not be mapped onto the first channel and/or the third channel.

Optionally, when the PUCCH format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2, the UCI to be carried on the second channel may be mapped (multiplexed) onto the first channel and/or the third channel for transmission. Because when the PUCCH format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2, fewer bits (bits) are occupied by the UCI, the first channel and the third channel can carry the bits; when the PUCCH format adopted by the second channel is PUCCH format 3 or PUCCH format 4, the UCI occupies more bits, and the first channel and the third channel may not carry too many bits.

When the priority of the PUCCH (second channel) is higher than or equal to the priority of the first channel and the priority of the third channel, the terminal device does not cancel sending the second signal to the network device by each first symbol of the N symbols in the second time unit, that is, the terminal device sends the second signal to the network device by each first symbol of the N symbols in the second time unit, so that transmission of a relatively important (high-priority) signal can be guaranteed, and at this time, the base station does not perform joint channel estimation. When the priority of the PUCCH (second channel) is higher than or equal to the priority of the first channel and the priority of the third channel, it may also be cancelled that each first symbol of the N symbols in the second time unit sends the second signal to the network device, and the UCI to be carried on the PUCCH is mapped to the first channel and/or the third channel for transmission, which is beneficial for the base station to perform joint channel estimation. This is not particularly limited in the embodiments of the present application.

Illustratively, when the second signal is a sounding reference signal, SRS, the terminal device cancels each of the N symbols in the second time unit to transmit the second signal to the network device. Or, when the priority of the first channel and the third channel is higher than or equal to the first threshold value, the terminal device cancels each first symbol of the N symbols in the second time unit from transmitting the second signal to the network device. Or, when the second signal is the sounding reference signal SRS and the priorities of the first channel and the third channel are higher than or equal to the first threshold, the terminal device cancels each of the N symbols in the second time unit to send the second signal to the network device. For example, when the priority of the first channel and the third channel is 1, the terminal device cancels every first symbol in the second time unit to transmit the second signal to the network device; when the priority of the first channel and the third channel is 0, the terminal device may transmit the second signal to the network device at the first symbol in the second time unit. For another example, when the second signal is a sounding reference signal SRS, and the priority of the first channel and the third channel is 1, the SRS transmission is cancelled; when the second signal is the sounding reference signal SRS, and the priority of the first channel and the third channel is 0, only SRS transmission on a part of the first symbol may be cancelled, or SRS transmission may not be cancelled.

In a special case, if the terminal device cancels transmitting the second DMRS to the network device in the third time cell where the third channel is located, the terminal device may not cancel transmitting the second signal to the network device in the at least one first symbol in the second time cell, so as not to affect transmission on the at least one first symbol in the second time cell. In this case, the base station does not perform joint channel estimation.

The first time unit, the second time unit and the third time unit are time units in a time domain window range for performing joint channel estimation, and the time domain window is a time range for performing joint channel estimation.

As shown in fig. 8, a schematic diagram is shown for canceling at least one first symbol in a second time unit from transmitting a second signal to a network device. Assume that a time domain window of the joint channel estimation includes 4 time units, the first time unit to the fourth time unit are within the time domain window, and the fifth time unit is not within the time domain window. The terminal device transmits DMRS for joint channel estimation to the network device in the first time unit and the third time unit, and the at least one first symbol in the second time unit and the at least one first symbol in the fourth time unit are configured/instructed to transmit a second signal to the network device, for example: the second signal may be a sounding reference signal, SRS. In this case, the terminal device cancels at least one first symbol in the second time unit to transmit the second signal to the network device, so that the base station performs joint channel estimation. The fifth time unit in which the fifth channel is located is not within the time domain window range for performing the joint channel estimation, and therefore, at least one first symbol in the fourth time unit does not need to be cancelled to send the second signal to the network device.

In the case where multiple slots carry one transport block (TBoMS), other uplink transmissions are located between two PUSCH/PUCCH channels in one or more slots carrying one transport block (a transport allocation for TBoMS, TOT) or one time domain window, and other uplink transmissions in the middle of two consecutive PUSCH/PUCCH channels in a smaller range of both one time domain window and TOT can be cancelled.

It will be appreciated that the first and third channels may be different repetitions of the same channel, or may be different channels.

In the technical solution provided in the embodiment of the present application, the terminal device sends the first DMRS to the network device in the first time unit where the first channel is located, sends the second DMRS to the network device in the third time unit where the third channel is located, and cancels at least one first symbol in the second time unit between the first time unit and the third time unit to send the second signal to the network device, so that continuity of phases and amplitudes of the first DMRS and the second DMRS may be ensured, and reliability of channel detection may be improved.

As shown in fig. 9, a schematic flow chart of another method 900 for channel detection according to the embodiment of the present application is provided.

And 910, the terminal equipment transmits the first DMRS to the network equipment in the first time unit of the first channel. The network device may be a base station. Correspondingly, the network device receives the first DMRS sent by the terminal device in the first time unit in which the first channel is located.

The terminal device determines, 920, that at least one second symbol in a second time unit, which is subsequent to the first time unit and is consecutive to the first time unit, transmits a fourth signal to the network device. The fourth signal is determined according to the first DMRS. It is to be understood that the terminal device cancels other symbols than the at least one second symbol in the second time unit for uplink transmission, in other words, the terminal device does not uplink other symbols than the at least one second symbol in the second time unit. Correspondingly, the network device determines that the fourth signal transmitted by the terminal device is received in at least one second symbol in a second time unit.

930, the terminal device transmits the second DMRS to the network device in a third time element in which the third channel is located, wherein the first DMRS is related to the second DMRS, and the third time element is subsequent to the second time element and is consecutive to the second time element. The network device may perform joint channel estimation based on the received first and second DMRSs. Correspondingly, the network device receives the second DMRS sent by the terminal device in a third time unit in which the third channel is located. And the network equipment performs channel detection according to the first DMRS and the second DMRS.

Specifically, the first DMRS is related to the second DMRS, and it is understood that a phase difference between the first DMRS and the second DMRS is less than or equal to a first preset value, and an amplitude difference between the first DMRS and the second DMRS is less than or equal to a second preset value. The first preset value and the second preset value may be predefined, or may be determined by the network device (base station) and indicated to the terminal device.

The first channel and the third channel may be physical uplink shared channels, PUSCHs, and the first channel and the third channel may also be physical uplink control channels, PUCCHs. Optionally, the first channel and the third channel may be two repetitions of the same channel, for example, the first channel and the third channel may be two repetitions of the same PUSCH, or the first channel and the third channel may be two repetitions of the same PUCCH. The first channel and the third channel may also be different channels, for example, the first channel and the third channel may be PUSCHs carrying different transport blocks, or the first channel and the third channel may be PUCCHs carrying different transport blocks.

Specifically, a Physical Resource Block (PRB) occupied by the at least one second symbol and a physical resource block occupied by the first time unit satisfy a first preset condition, and/or a power of the fourth signal and a power of the first DMRS satisfy a second preset condition, and/or a port used by the at least one second symbol is the same as a port used by the first channel.

Wherein the first preset condition may include one or more of the following: the physical resource block occupied by the at least one second symbol is the same as the physical resource block occupied by the first time unit, or the physical resource block occupied by the at least one second symbol is the same as the physical resource block occupied by the first time unit in size, or the physical resource block occupied by the at least one second symbol is adjacent to the physical resource block occupied by the first time unit, that is, no other physical resource block exists between the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit.

The second preset condition includes that a difference between the power of the fourth signal and the power of the first DMRS is less than or equal to a third preset value.

Optionally, the fourth signal may also be determined according to the second DMRS, and the fourth signal may also be determined according to the first DMRS and the second DMRS. The fourth signal may be a sounding reference signal, SRS.

Optionally, the terminal device may report the capability information related to joint channel estimation to the network device, for example, the terminal device may enable the power of the fourth signal transmitted in the second time unit to be the same as the power of the DMRSs transmitted in other channels (e.g., the first channel and the third channel). The base station can determine whether joint channel estimation can be performed according to the capability information reported by the terminal equipment.

In the technical solution provided in this embodiment, a terminal device sends a first DMRS to a network device in a first time unit in which a first channel is located, sends a second DMRS to the network device in a third time unit in which a third channel is located, and sends a fourth signal to the network device in at least one second symbol in a second time unit between the first time unit and the third time unit, where a physical resource block occupied by the at least one second symbol is the same as a physical resource block occupied by the first time unit, and/or a difference between a power of the fourth signal and a power of the first DMRS is smaller than or equal to a third preset value, so that continuity of phases and amplitudes of the first DMRS and the second DMRS can be ensured, and reliability of channel detection can be improved.

An embodiment of the present application proposes a communication apparatus, and as shown in fig. 10, a schematic block diagram of a communication apparatus 1000 according to an embodiment of the present application is shown. The apparatus may be applied to the terminal device in the method embodiments of fig. 3 or fig. 9. The communication apparatus 1000 includes:

a sending unit 1010, configured to send a first demodulation reference signal DMRS to a network device in a first time unit where a first channel is located;

a determining unit 1020 for cancelling at least one first symbol in a second time unit, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit, from transmitting a second signal to the network device; or, to determine that at least one second symbol in the second time unit transmits a fourth signal to the network device, the fourth signal determined according to the first DMRS;

the transmitting unit 1010 is further configured to transmit, to the network device, a second DMRS in a third time unit in which a third channel is located, where the first DMRS is related to the second DMRS, and the third time unit is after the second time unit and the third time unit is consecutive to the second time unit.

Optionally, the determining unit 1020 is specifically configured to cancel sending the second signal to the network device by each first symbol in the second time unit.

Optionally, the determining unit 1020 is specifically configured to cancel each first symbol in the N symbols in the second time unit to send the second signal to the network device, where the N symbols are consecutive, and a last symbol in the N symbols is consecutive to a first symbol in the third time unit, where the second time unit includes M symbols, M is greater than N, and N and M are positive integers.

Optionally, N is determined by the terminal device according to capability information of the terminal device itself, or N is determined by the terminal device according to parameter information configured by the network device.

Optionally, the first channel and the third channel are a physical uplink shared channel PUSCH or a physical uplink control channel PUCCH.

Optionally, the determining unit 1020 is configured to cancel that a second channel is located in a second time unit when at least one first symbol in the second time unit sends a second signal to the network device, where the second channel is a physical uplink control channel, PUCCH, and a priority of the PUCCH is lower than or equal to a priority of the first channel and/or a priority of the third channel.

Optionally, the sending unit 1010 is further configured to send, on the first channel and/or the third channel, uplink control information UCI to be carried on the PUCCH.

Optionally, the format adopted by the second channel is PUCCH format 0, PUCCH format 1, or PUCCH format 2.

Optionally, the first channel and the third channel are PUCCHs, and formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4.

Optionally, the second signal and/or the fourth signal are sounding reference signals, SRS, and/or the determining unit 1020 is configured to cancel that, when at least one first symbol in a second time unit sends a second signal to the network device, the priorities of the first channel and the third channel are higher than a first threshold.

Optionally, the first DMRS is related to the second DMRS, and includes: the phase difference between the first DMRS and the second DMRS is smaller than or equal to a first preset value, and the amplitude difference between the first DMRS and the second DMRS is smaller than or equal to a second preset value.

Optionally, the fourth signal is determined according to the first DMRS, and includes: the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit satisfy a first preset condition, and/or the power of the fourth signal and the power of the first DMRS satisfy a second preset condition.

Optionally, the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or the same as a physical resource block occupied by the first time unit in size; the second preset condition includes that a difference between the power of the fourth signal and the power of the first DMRS is less than or equal to a third preset value.

Optionally, the first channel and the third channel are two transmissions of the same channel, or the first channel and the third channel are different channels.

An embodiment of the present application provides a communication apparatus, and as shown in fig. 11, a schematic block diagram of a communication apparatus 1100 according to an embodiment of the present application is shown. The apparatus may be applied to a network device in the method embodiments of fig. 3 or fig. 9. The communication apparatus 1100 includes:

a receiving unit 1110, configured to receive, in a first time unit where a first channel is located, a first demodulation reference signal DMRS sent by a terminal device;

a determining unit 1120 for cancelling reception of a second signal in at least one first symbol in a second time unit, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit; or, to determine to receive a fourth signal transmitted by the terminal device in at least one second symbol in the second time unit, the fourth signal determined according to the first DMRS;

the receiving unit 1110 is further configured to receive, at a third time unit where a third channel is located, a second DMRS sent by the terminal device, where the first DMRS is related to the second DMRS, and the third time unit is after the second time unit and is consecutive to the second time unit;

a processing unit 1130, configured to perform channel detection according to the first DMRS and the second DMRS.

Optionally, the determining unit 1120 is specifically configured to cancel receiving the second signal in each first symbol in the second time unit.

Optionally, the determining unit 1120 is specifically configured to cancel each first symbol in N symbols in a second time unit from receiving the second signal, where the N symbols are consecutive, and a last symbol in the N symbols is consecutive to a first symbol in the third time unit, where the second time unit includes M symbols, M is greater than N, and N and M are positive integers.

Optionally, the determining unit 1120 is configured to cancel that a second channel is located in a second time unit when a second signal is received in at least one first symbol in the second time unit, where the second channel is a physical uplink control channel, PUCCH, and a priority of the PUCCH is lower than or equal to a priority of the first channel and/or a priority of the third channel.

Optionally, the receiving unit 1110 is further configured to receive uplink control information UCI to be carried on the PUCCH on the first channel and/or the third channel.

Optionally, the second signal and/or the fourth signal are sounding reference signals, SRS, and/or the determining unit is configured to cancel that the priorities of the first channel and the third channel are higher than a first threshold when the determining unit cancels receiving of the second signal in at least one first symbol in a second time unit.

An embodiment of the present application provides a communication device 1200, and as shown in fig. 12, a schematic block diagram of a communication device 1200 according to an embodiment of the present application is shown.

The communication device 1200 includes: a processor 1210 and a transceiver 1220, wherein the transceiver 1220 is configured to receive computer code or instructions and transmit the computer code or instructions to the processor 1210, and the processor 1210 executes the computer code or instructions to implement the method in the embodiments of the present application. The communication device may be a terminal device or a network device in the embodiments of the present application.

The processor 1210 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

Embodiments of the present application further provide a computer-readable storage medium, on which a computer program for implementing the method in the above method embodiments is stored. When the computer program runs on a computer, the computer is enabled to implement the method in the above-described method embodiments.

Embodiments of the present application further provide a computer program product, which includes computer program code, when the computer program code runs on a computer, the method in the above method embodiments is executed.

The embodiment of the present application further provides a chip, which includes a processor, where the processor is connected to a memory, where the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the chip executes the method in the foregoing method embodiment.

It should be understood that the numbers "first" and "second" of 82303023 in the embodiments of the present application are only used for distinguishing different objects, such as for distinguishing different time units, and do not limit the scope of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

In addition, the term "and/or" in this application is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship; the term "at least one" in the present application may mean "one" and "two or more", for example, in a, B and C, may mean: a exists alone, B exists alone, C exists alone, A and B exist together, A and C exist together, C and B exist together, A and B exist together, and A, B and C exist together, which are seven cases.

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 implementation. 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 is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the 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 of channel detection, comprising:

the terminal equipment sends a first demodulation reference signal (DMRS) to the network equipment in a first time unit where a first channel is located;

the terminal device canceling at least one first symbol in a second time unit from sending a second signal to the network device, the second time unit being subsequent to the first time unit and the second time unit being consecutive to the first time unit; or, the terminal device determining that at least one second symbol in the second time unit transmits a fourth signal to the network device, the fourth signal being determined according to the first DMRS;

and the terminal equipment transmits a second DMRS to the network equipment in a third time unit in which a third channel is positioned, wherein the first DMRS is related to the second DMRS, and the third time unit is behind the second time unit and is continuous with the second time unit.

2. The method of claim 1, wherein the terminal device refraining from transmitting a second signal to the network device for at least one first symbol in a second time unit, comprising:

the terminal equipment cancels the transmission of the second signal to the network equipment by each first symbol in the second time unit.

3. The method of claim 1, wherein the terminal device refraining from transmitting a second signal to the network device for at least one first symbol in a second time unit, comprising:

the terminal device cancels each first symbol of the N symbols in the second time unit to send the second signal to the network device, where the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of the third time unit, where the second time unit includes M symbols, M is greater than N, and N and M are positive integers.

4. The method of claim 3,

the N is determined by the terminal device according to the capability information of the terminal device, or the N is determined by the terminal device according to the parameter information configured by the network device.

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

the first channel and the third channel are Physical Uplink Shared Channels (PUSCHs) or Physical Uplink Control Channels (PUCCHs).

6. The method according to any of claims 1 to 5, wherein the terminal device cancels the transmission of the second signal to the network device in at least one first symbol in a second time unit, wherein a second channel is located in the second time unit, wherein the second channel is a Physical Uplink Control Channel (PUCCH), and wherein the PUCCH has a lower priority than or equal to the priority of the first channel and/or the priority of the third channel.

7. The method of claim 6, further comprising:

and the terminal equipment sends Uplink Control Information (UCI) to be carried on the PUCCH on the first channel and/or the third channel.

8. The method of claim 7,

the format adopted by the second channel is PUCCH format 0, PUCCH format 1 or PUCCH format 2.

9. The method of claim 7,

the first channel and the third channel are PUCCHs, and the formats adopted by the first channel and the third channel are PUCCH format 3 or PUCCH format 4.

10. The method according to any of claims 1 to 5, wherein the second signal and/or the fourth signal is a sounding reference signal, SRS, and/or wherein the priority of the first channel and the third channel is higher than a first threshold when the terminal device cancels transmission of a second signal to the network device in at least one first symbol in a second time unit.

11. The method of any one of claims 1 to 10, wherein the first DMRS is related to the second DMRS, comprising:

the phase difference between the first DMRS and the second DMRS is smaller than or equal to a first preset value, and the amplitude difference between the first DMRS and the second DMRS is smaller than or equal to a second preset value.

12. The method of any one of claims 1 to 11, wherein the fourth signal is determined according to the first DMRS, comprising:

the physical resource block occupied by the at least one second symbol and the physical resource block occupied by the first time unit satisfy a first preset condition, and/or the power of the fourth signal and the power of the first DMRS satisfy a second preset condition.

13. The method of claim 12,

the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or same in size as a physical resource block occupied by the first time unit;

14. The method according to any one of claims 1 to 13,

the first channel and the third channel are two transmissions of the same channel, or the first channel and the third channel are different channels.

15. A method of channel detection, comprising:

the method comprises the steps that network equipment receives a first demodulation reference signal (DMRS) sent by terminal equipment in a first time unit where a first channel is located;

the network device cancelling reception of a second signal in at least one first symbol in a second time unit, the second time unit being subsequent to and contiguous with the first time unit; alternatively, the network device determines to receive a fourth signal transmitted by the terminal device in at least one second symbol in the second time unit, the fourth signal being determined according to the first DMRS;

the network equipment receives a second DMRS transmitted by the terminal equipment in a third time unit in which a third channel is positioned, wherein the first DMRS is related to the second DMRS, and the third time unit is behind the second time unit and is continuous with the second time unit;

and the network equipment performs channel detection according to the first DMRS and the second DMRS.

16. The method of claim 15, wherein the network device cancels reception of the second signal in at least one first symbol in a second time unit, comprising:

the network device cancels receiving the second signal in every first symbol in the second time unit.

17. The method of claim 15, wherein the network device cancels reception of the second signal in at least one first symbol in a second time unit, comprising:

the network device cancels each first symbol of N symbols in a second time unit to receive a second signal, the N symbols are consecutive, and a last symbol of the N symbols is consecutive to a first symbol of the third time unit, wherein the second time unit comprises M symbols, M is greater than N, and N and M are positive integers.

18. The method according to any one of claims 15 to 17,

19. Method according to any of claims 15 to 18, wherein the network device cancels receiving of a second signal in at least one first symbol in a second time unit, wherein a second channel is located in the second time unit, wherein the second channel is a physical uplink control channel, PUCCH, and wherein the PUCCH has a lower priority than or equal to the priority of the first channel and/or the priority of the third channel.

20. The method of claim 19, further comprising:

and the network equipment receives Uplink Control Information (UCI) to be carried on the PUCCH on the first channel and/or the third channel.

21. The method of claim 20,

22. The method of claim 20,

23. The method according to any of claims 15 to 18, wherein the second signal and/or the fourth signal is a sounding reference signal, SRS, and/or wherein the network device cancels reception of a second signal in at least one first symbol in a second time unit, and wherein the first channel and the third channel have a higher priority than a first threshold.

24. The method of any one of claims 15 to 23, wherein the first DMRS is related to the second DMRS, comprising:

25. The method of any one of claims 15 to 24, wherein the fourth signal is determined according to the first DMRS, comprising:

26. The method of claim 25,

the first preset condition includes that a physical resource block occupied by the at least one second symbol is the same as or the same as the physical resource block occupied by the first time unit in size;

27. The method of any one of claims 15 to 26,

28. A communications apparatus, comprising: at least one processor configured to perform the method of any one of claims 1 to 14.

29. A communications apparatus, comprising: at least one processor configured to perform the method of any one of claims 15 to 27.

30. A communication device, comprising: a processor and a transceiver for receiving computer code or instructions and transmitting the computer code or instructions to the processor, the processor executing the computer code or instructions, the method of any of claims 1 to 27.

31. A computer-readable storage medium, comprising:

the computer readable medium stores a computer program;

the computer program, when run on a computer, causes the computer to perform the method of any one of claims 1 to 27.

32. A computer program product, comprising a computer program that, when executed, causes the method of any of claims 1 to 27 to be carried out.