CN114731257A

CN114731257A - Uplink channel demodulation method and uplink channel demodulation device

Info

Publication number: CN114731257A
Application number: CN202080081198.4A
Authority: CN
Inventors: 余雅威; 郭志恒; 谢信乾
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2022-07-08
Also published as: WO2021138895A1

Abstract

The application provides an uplink channel demodulation method and an uplink channel demodulation device, wherein the method comprises the following steps: receiving a Sounding Reference Signal (SRS) sent by terminal equipment; receiving an uplink channel sent by terminal equipment; and performing channel estimation on the uplink channel and demodulating the information carried by the uplink channel by using the SRS. Since the SRS is not carried in the uplink channel, or the SRS and the uplink channel are independently transmitted, estimating the uplink channel and demodulating information carried in the uplink channel based on the SRS can reduce or even eliminate the need to transmit the DMRS on the uplink channel, and thus, the overhead of the DMRS in the uplink channel can be reduced on the basis of ensuring the demodulation performance of the data in the uplink channel.

Description

Uplink channel demodulation method and uplink channel demodulation device

Technical Field

The present invention relates to the field of wireless communications, and in particular, to an uplink channel demodulation method and an uplink channel demodulation apparatus.

Background

In the wireless communication transmission process, the network device estimates a channel of an uplink channel by using a Demodulation Reference Signal (DMRS) of the uplink channel, and demodulates information carried by the uplink channel.

Generally, the more demodulation reference signals of an uplink channel, the more accurate the channel estimation based on the demodulation reference signals, and the better the demodulation performance of the network device on the data carried on the uplink channel, that is, the higher the correct rate of data transmission, but the higher the overhead of the demodulation reference signals. Since the demodulation reference signal and the data of the uplink channel can multiplex different subcarriers of the same time unit, when the overhead of the demodulation reference signal is large, the resources available for data transmission become small, resulting in less effective data transmitted by the system.

Therefore, a method is needed to ensure the demodulation performance of the data in the uplink channel and reduce the overhead of the demodulation reference signal in the uplink channel.

Disclosure of Invention

The present application provides an uplink channel demodulation method, an uplink channel demodulation apparatus, an uplink channel transmission method, and an uplink channel transmission apparatus, which can reduce the overhead of demodulation reference signals in an uplink channel on the basis of ensuring the demodulation performance of information carried by the uplink channel.

In a first aspect, a method for uplink channel demodulation is provided, including: receiving a Sounding Reference Signal (SRS) sent by terminal equipment; receiving an uplink channel sent by terminal equipment; and demodulating the information carried by the uplink channel by using the SRS.

Since the SRS is not carried on the uplink channel, or the SRS and the uplink channel are independently transmitted, the uplink channel is demodulated based on the SRS, and it is possible to reduce or even eliminate the need to transmit the demodulation reference signal DMRS on the uplink channel, and therefore, the overhead of the demodulation reference signal in the uplink channel can be reduced on the basis of ensuring the demodulation performance of the data of the uplink channel.

Optionally, the SRS and the uplink channel have the same transmission parameter, and the transmission parameter includes at least one of the following parameters: transmit power, antenna ports, precoding matrix, or frequency domain resources.

By making the transmission parameters of the SRS and the uplink channel the same, the channel difference between the SRS and the uplink channel can be reduced, and the effect of demodulating the uplink channel based on the SRS can be improved.

Optionally, the uplink channel includes a non-codebook uplink channel, for example, a non-codebook PUSCH.

In this case, the transmission parameter of the non-codebook uplink channel is the same as the transmission parameter corresponding to the SRS resource indicated by the DCI uplink Scheduling Request Instruction (SRI).

Optionally, the SRS is located in a first time unit, a first time unit corresponding to the uplink channel is a third time unit, where the first time unit and the third time unit are adjacent time units, or T time units spaced between the first time unit and the third time unit, where T is a positive integer, and is less than or equal to a second threshold, where the second threshold is predefined by a communication protocol, or the second threshold is indicated by a network device.

By making the time unit for bearing the SRS and the time unit for bearing the uplink channel adjacent to each other, or keeping the time interval between the two within a small range, the increase of the channel quality difference between the channel for bearing the SRS and the uplink channel due to a large time distance can be avoided, and the effect of demodulating the uplink channel based on the SRS can be improved.

Optionally, the demodulating, by the uplink channel, the uplink channel including a demodulation reference signal DMRS and according to the SRS includes: and demodulating the uplink channel by using the SRS and the DMRS.

By demodulating the uplink channel by using the SRS and the DMRS together, the number of reference signals for demodulating the uplink channel can be increased, more accurate channel estimation can be performed, and the demodulation performance of the uplink channel can be improved.

Optionally, the SRS is located in a first time unit, and the DMRS is located in a second time unit, wherein the first time unit and the second time unit are adjacent time units, or K time units spaced between the first time unit and the second time unit, K is a positive integer, and K is less than or equal to a first threshold, wherein the first threshold is predefined by a communication protocol, or is indicated by a network device.

By making the time cell for carrying the SRS and the time cell for carrying the DMRS adjacent to each other or keeping the time interval therebetween within a small range, the difference in channel quality between the SRS and the DMRS can be reduced, and the effect of demodulating the uplink channel based on the combination of the SRS and the DMRS can be improved.

Optionally, the SRS is further configured to perform channel estimation on the uplink channel.

Optionally, the uplink channel includes at least one of an uplink shared channel PUSCH and an uplink control channel PUCCH.

For example, in one implementation manner, demodulating the uplink channel according to the SRS includes: and demodulating PUSCH according to the SRS.

At this time, the PUSCH employs the same transmission parameters as the SRS.

For another example, in an implementation manner, the demodulating, according to the SRS, the uplink channel includes: and demodulating the PUSCH according to the DMRS included in the SRS and the PUSCH.

At this time, the PUSCH employs the same transmission parameters as the SRS.

For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: and demodulating information carried on the PUCCH by using the SRS.

At this time, the PUCCH uses the same transmission parameter as the SRS. For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: and demodulating the PUCCH by using the SRS and the DMRS on the PUCCH.

At this time, the PUCCH uses the same transmission parameter as the SRS. For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: and demodulating PUCCH and PUSCH by using the SRS.

At this time, the PUCCH and the PUSCH both use the same transmission parameters as the SRS. For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: and demodulating the PUCCH and/or PUSCH by using the SRS, the DMRS on the PUCCH and the DMRS on the PUSCH.

At this time, the PUCCH and the PUSCH both use the same transmission parameters as the SRS.

In a second aspect, an uplink channel transmitting method is provided, including: sending a Sounding Reference Signal (SRS) to network equipment; sending an uplink channel to the network device; wherein, the SRS is used for demodulating the information carried by the uplink channel.

Optionally, the SRS is located in a first time unit, a first time unit corresponding to the uplink channel is a third time unit, where the first time unit and the third time unit are adjacent time units, or T time units spaced between the first time unit and the third time unit, where T is a positive integer and is less than or equal to a second threshold, where the second threshold is predefined by a communication protocol, or the second threshold is indicated by a network device.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and demodulation of the uplink channel is performed based on the SRS and the DMRS.

Optionally, the SRS is located in a first time unit, the uplink channel is located in a second time unit, where the first time unit and the second time unit are adjacent time units, or K time units spaced between the first time unit and the second time unit, K is a positive integer, and K is smaller than or equal to a first threshold, where the first threshold is predefined by a communication protocol, or the first threshold is indicated by a network device.

In a third aspect, an uplink channel demodulation apparatus is provided, including: a receiving and sending unit, configured to receive a sounding reference signal SRS sent by a terminal device, and receive an uplink channel sent by the terminal device; and the processing unit is used for demodulating the information carried by the uplink channel by using the SRS.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and the processing unit is specifically configured to demodulate the uplink channel according to the SRS and the DMRS.

Optionally, the SRS and the uplink channel have the same transmission parameter, and the transmission parameter includes at least one of the following parameters:

transmit power, antenna ports, precoding matrix, or frequency domain resources.

In a fourth aspect, an uplink channel transmitting apparatus is provided, including: a transceiver unit, configured to send a sounding reference signal SRS to a network device, and send an uplink channel to the network device; wherein the SRS is used for demodulation of the uplink channel.

Optionally, the SRS and the uplink channel have the same transmission parameter, and the transmission parameter includes at least one of the following parameters: transmission power, antenna ports, precoding matrix, frequency domain resources.

In a fifth aspect, there is provided a wireless communication apparatus comprising means for performing the method of the first aspect or any one of its possible implementations.

In a sixth aspect, a wireless communications apparatus is provided that includes means or elements for performing the method of the second aspect or any one of its possible implementations.

In a seventh aspect, a communication device is provided, which includes a processor coupled with a memory and configured to perform the method of the first aspect or any one of the possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip or a system of chips. When the communication device is a chip or a system of chips, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip or the system of chips, and the like. The processor may also be embodied as a processing circuit or a logic circuit.

In an eighth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of the second aspect or any of the possible implementations of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface. Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In a ninth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that any of the first to fourth aspects, and any possible implementation manner of the first to fourth aspects, is implemented.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In a tenth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory, and may receive a signal via the receiver and transmit a signal via the transmitter to perform the method of any one of the possible implementations of the first to fourth aspects and the first to fourth aspects.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It will be appreciated that the associated data interaction process, for example, sending the indication information, may be a process of outputting the indication information from the processor, and receiving the capability information may be a process of receiving the input capability information from the processor. In particular, the data output by the processor may be output to a transmitter and the input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processor in the tenth aspect may be a chip, and may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

In an eleventh aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any one of the possible implementations of the first to fourth aspects and the first to fourth aspects described above.

In a twelfth aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code or instructions) that, when executed on a computer, causes the computer to perform the method of any one of the possible implementations of the first to fourth aspects and the first to fourth aspects.

In a thirteenth aspect, a communication system is provided, which includes the aforementioned network device and terminal device.

Drawings

FIG. 1 is an application scenario of an embodiment of the present application;

FIG. 2 is a schematic diagram of a wireless communication process according to an embodiment of the present application;

FIG. 3 is yet another schematic diagram of a wireless communication process of an embodiment of the present application;

FIG. 4 is a schematic block diagram of a wireless communication device of an embodiment of the present application;

FIG. 5 is another schematic block diagram of a wireless communications device of an embodiment of the present application;

fig. 6 is a schematic block diagram of a terminal device of an embodiment of the present application;

fig. 7 is a schematic block diagram of a network device of an embodiment of the present application.

Detailed Description

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

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, or a New Radio Network (NR), etc.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The Network device in this embodiment may be a device for communicating with a terminal device, where the Network device may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, may also be a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, may also be an evolved node b (eNB, or eNodeB) in an LTE System, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay Station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a future 5G Network, or a Network device in a future evolved PLMN Network, and the like, and the embodiment of the present invention is not limited.

For the understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail with reference to fig. 1. Fig. 1 is a schematic diagram of a communication system 100 suitable for use in a method of transmitting and receiving reference signals according to an embodiment of the present application. As shown in fig. 1, the communication system 100 may include a network device 102 and a

terminal device

104 and 114.

It should be understood that the network device 102 may be any device with wireless transceiving function or a chip disposed on the device, including but not limited to: a base station (e.g., a base station NodeB, an evolved node b, a network device in a fifth generation (5G) communication system (e.g., a Transmission Point (TP), a Transmission Reception Point (TRP), a base station, a small base station device, etc.), a network device in a future communication system, an access node in a Wireless Fidelity (WiFi) system, a Wireless relay node, a Wireless backhaul node, etc.

Network device 102 may communicate with a plurality of terminal devices (e.g.,

terminal device

104 and 114 as shown).

It should be understood that a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. In the embodiment of the present application, the terminal device and the chip that can be disposed on the terminal device are collectively referred to as a terminal device.

Furthermore, the communication system 100 may also be a Public Land Mobile Network (PLMN) network, a device to device (D2D) network, a machine to machine (M2M) network, or other networks. Fig. 1 is a simplified schematic diagram of an example for ease of understanding only, and other network devices and terminal devices, which are not shown in fig. 1, may also be included in the communication system 100.

To facilitate understanding of the embodiments of the present application, data demodulation in uplink transmission is briefly described below.

1. Reference signal

Two Uplink Reference signals are defined in a New Radio Access technology (NR) protocol, for example, a Demodulation Reference Signal (DMRS) and a Sounding Reference Signal (SRS), where the DMRS and a Physical Uplink Shared Channel (PUSCH) can multiplex different subcarriers of the same time unit, and the same precoding and power control as the PUSCH are used, so that a receiving end (e.g., a base station in Uplink transmission) can complete estimation of a Channel of the PUSCH based on the DMRS and demodulate a Signal carried in the PUSCH.

The SRS is mainly used for estimating channel quality of an uplink transmission channel (when the uplink and downlink channels are reciprocal, the SRS is also used for estimating the downlink channel) on a network side, and reasonably configures scheduling information of uplink transmission, such as a Modulation and Coding Scheme (MCS), precoding adopted by an uplink PUSCH, a closed-loop adjustment amount of power control, and the like. In the non-codebook transmission, the network device may configure, for the terminal device, an SRS resource set for acquiring uplink Channel State Information (CSI), where the SRS resource set includes at most 4 SRS resources, and each SRS resource corresponds to a different SRS port. One SRS resource includes resource allocation of the SRS in the time domain. In the NR, SRS is located in the last 6 time domain symbols of a slot, and the configured SRS resource can only occupy continuous time domain symbols in the time domain. The SRS can perform frequency hopping of different symbols in a time slot and frequency hopping among time slots on a frequency domain, so that a larger detection bandwidth is obtained, and frequency selection scheduling can be performed particularly when fading channel frequency is selectively faded in a mobile scene.

2. Channel estimation and data transmission

Channel estimation is the process of estimating the model parameters of the channel model from the received data. Through channel estimation, a receiving device (which may be a network device or a terminal device) may obtain an impulse response of a channel, thereby providing required CSI for subsequent coherent demodulation.

Illustratively, when performing downlink Channel State estimation in non-codebook transmission, first, the network device configures a Channel State information Reference Signal (CSI-RS) with non-zero power related to SRS resources, which is used for the terminal device to perform downlink Channel State information measurement, and may include Channel quality indication, Reference Signal receiving power, and the like, and determines non-codebook precoding for uplink SRS transmission in uplink and downlink Channel reciprocity. In addition, the terminal device further calculates an open-loop path loss of signal transmission according to the CSI-RS, receives a closed-loop power control indication in Downlink Control Information (DCI), determines a transmission power of an uplink SRS, and then transmits the non-codebook-precoded SRS at a corresponding SRS port.

Secondly, after receiving the SRS of the uplink non-codebook, the network device performs estimation of an uplink transmission channel, and determines parameters for PUSCH transmission according to the estimated uplink channel quality, for example: MCS, Sounding Resource Indication (SRI), and the like, where the MCS is a modulation order and a code rate adopted for PUSCH transmission, that is, when channel quality is good, a higher modulation order and a higher code rate are adopted, and the code rate of transmission is improved; and when the channel quality is poor, a lower modulation order and a lower code rate are adopted, so that a lower block error rate is ensured. The SRI is used to indicate the beam direction and the number of data streams to be transmitted, which should be adopted by the terminal during PUSCH transmission, that is, when the network side receives multiple SRS beams in different directions, the network side preferably selects the SRS direction in the stronger direction and determines the number of streams for PUSCH transmission (corresponding to the number of SRS beam directions selected), and indicates the transmission of the terminal PUSCH in the better beam direction in the form of an SRI field in the DCI.

And finally, the terminal equipment transmits the PUSCH on the corresponding SRS port by detecting the value of the relevant field related to the PUSCH transmission in the DCI.

3. Data demodulation

In uplink transmission, DMRS is used for the network device to perform channel estimation on the PUSCH channel, thereby demodulating data carried on the PUSCH.

Generally, the DMRS can occupy 4 time domain symbols at most, and has the following two configuration modes:

the first method is as follows:

each DMRS occupies 1 time domain symbol, and a network device can configure 4 such DMRSs at most. Generally, the first DMRS is referred to as a preamble DMRS, the subsequent DMRSs are referred to as additional DMRSs, and the number of the additional DMRSs (0,1,2,3) is configured by RRC signaling.

The second method comprises the following steps:

each DMRS occupies two consecutive time domain symbols, and the network device can configure 2 DMRSs at most, that is, the DMRSs occupies 4 time domain symbols at most. Similarly, the DMRS of the first set of 2 consecutive time domain symbols is referred to as a preamble DMRS, the DMRS of the subsequent 2 consecutive time domain symbols is referred to as an additional DMRS, and the number (0,1) of the additional DMRS is configured through RRC signaling.

The DMRS adopting any mode is determined by a parameter DMRS maxlength and DCI in RRC signaling, and when DMRS maxlength is 1, DMRS configuration of mode 1 can only be adopted, that is, each DMRS can only occupy 1 time domain symbol; when DMRS maxlength is 2, DMRS configurations of modes 1 or 2 may be used, specifically which mode is configured through a related field in DCI.

4. Transmission power parameter

In uplink transmission, power control is important for the transmission of uplink reference signals, and when the channel quality of uplink transmission is poor, for example: when the distance that the terminal device performs uplink propagation is long, which results in large path loss, or when the network device receives the uplink reference signal, the network device needs to instruct (hereinafter, may also be referred to as configuration) the terminal device to perform uplink transmission at a high uplink reference signal power, so as to effectively receive the uplink reference signal.

Generally, when a network device performs power control of an uplink reference signal, the following formula needs to be satisfied:

P＝min{P _cmax,{P ₀(j)+α(j)*P _L(p)}+{f(l)}+{10lg M+Δ}}

wherein, { P₀(j)+α(j)*P _L(p) is the open loop operating point, { f (l) } is the closed loop offset, and {10lg M + Δ } is the other adjustment amount. Generally, the open-loop operating point is partially configured through a higher layer signaling, which may be an RRC signaling and is applicable to multiple time units, and the closed-loop offset is configured through Downlink Control Information (DCI) and is used to rapidly adjust the power of the uplink reference signal. And M in other adjustment quantities represents the number of physical resource blocks PRB occupied by the uplink transmission at this time, and the default uplink reference signal is the subcarrier interval of 15KHz at this time. The open-loop working point comprises the path loss information obtained after the terminal equipment carries out channel estimation on a downlink reference signal sent by the network equipment, the network equipment carries out power compensation on the path loss value, and power adjustment is carried out in a slow semi-static mode; the closed-loop offset is used for the network device to perform rapid and accurate adjustment based on the quality of the uplink signal received in the last transmission process, and illustratively, when the uplink transmission power received by the network device last time is too small, the network device may instruct the terminal device to perform higher-power transmission in the uplink transmission at this time through the closed-loop adjustment amount.

Illustratively, P in the open-loop operating point when the uplink reference signal is SRS_L(p), namely, estimating the path loss of the open-loop working point, generally, configuring the value of p through a high-level parameter pathlossReferenceSignal, and indexing to a related reference signal to calculate the path loss; when the higher layer parameter is not configured (for example, the terminal device has not accessed the system), the terminal device directly uses the reference signal in the synchronization signal block to calculate the path loss.

Illustratively, when the uplink reference is DMRS, P of the open-loop operating point_L(p), i.e., the path loss estimation for the open-loop operating point, is configured as follows: when the terminal equipment is not configured with a high-level parameter pathlossreference signal, the terminal equipment carries out path loss calculation based on a reference signal in the synchronous signal block; when the terminal equipment is configured with the higher-layer parameter pathlossReferenceSignal, the higher-layer parameter pus is directly passedThe channel-pathlossReferenceSignal-Id indexes a specific reference signal to calculate the path loss; when the PUSCH is msg3 transmission, the terminal equipment adopts the reference signal which is the same as the reference signal sent by the PRACH to calculate the path loss; when the terminal device configures a high-level parameter SRI-PUSCH-PowerControl and a plurality of PUSCH-pathlossfrecencesignal-Id values, it needs to index a corresponding downlink reference signal from a configured mapping relationship through the SRI in the DCI to perform path loss calculation.

For the non-codebook PUSCH/DMRS transmission, the terminal equipment needs to select at least one antenna port for PUSCH transmission through SRI index indication according to the number of layers of transmission data and the number of SRS resources configured by the network equipment, and path loss calculation is performed according to the path loss value of the antenna port. As shown in table 1, taking the number of transmission layers as 1 and the format of DCI as 0_1 as an example, the terminal device determines the antenna port for transmitting the PUSCH/DMRS through the index table. For example, when N is_SRSWhen 2, the terminal device may transmit PUSCH/DMRS through two antenna ports. The network device can instruct the terminal device to send the PUSCH/DMRS from a certain antenna port through the index value of the SRI, and when the SRI index value is 0, the terminal device sends the PUSCH/DMRS from an antenna port corresponding to a first SRS resource (SRS resource 0), and correspondingly, the terminal device performs path loss calculation by taking a path loss value of the first antenna port; and when the SRI index value is 1, the terminal equipment sends the PUSCH/DMRS from the antenna port corresponding to the second SRS resource (SRS resource 1), and correspondingly, the terminal equipment carries out path loss calculation according to the path loss value of the second antenna port.

Table 1 SRI index table for non-codebook PUSCH/DMRS transmission (transmission layer number 1)

SRI index value	SRI，N _SRS＝2	SRI index value	SRI，N _SRS＝3	SRI index value	SRI，N _SRS＝4
0	0	0	0	0	0
1	1	1	1	1	1
		2	2	2	2
		3	Retention (Reserved)	3	3

For the Power adjustment of the closed-loop offset, when the network device finds that the Power of the uplink signal transmitted by a certain time unit of the terminal device is too high, and the network device schedules the next uplink signal Transmission of the same type, exemplarily, the network device is notified by DCI to reduce the Power of the transmitted uplink signal by 1dB, and information in the DCI for notifying the terminal device to rapidly adjust the Power is called a Transmission Power Control Command (TPC-Command). Generally, the TPC-command has 2 bits, and exemplarily, when the field is 00, and the value of TPC-allocation in the higher layer signaling is 1, that is, TPC-allocation is enabled, the terminal device lowers 1dB of power on the basis of the last similar transmission closed loop adjustment amount, TPC-allocation is 0, that is, when TPC-allocation is not enabled, the closed loop adjustment amount of the terminal device in the current time unit is lowered by 4 dB; similarly, when the field is 01, 10, and 11, the closed loop power adjustment takes different values.

In general, P is the open-loop parameter₀(j) And alpha (j) are configured in pairs, 32 sets can be configured in total, and P is contained in P0-PUSCH-AlphaSet parameters of higher layer signaling₀(j) And the value of the sum alpha (j) is selected from the configured P0-PUSCH-AlphaSet through a P0-PUSCH-AlphaSetId index. Path loss estimation P of terminal equipment based on open-loop working point_LAnd (p) performing downlink path loss estimation on the index value, wherein the path loss estimation of downlink transmission is the uplink path loss estimation of the current time unit, and the parameter related to the path loss estimation is the PUSCH-pathlossreference rs.

The value of tpc-Accumulation in the high-level parameter determines the closed-loop power parameter { f (l) }, and illustratively, when tpc-Accumulation is enabled, i.e. 1, if the index value j of the partial parameter of the open-loop operating point is 1, the value of { f (l) } is indicated by the high-level parameter powercontrolloptouse. When TPC-Accumulation is not enabled, namely 0, the value of { f (l) } is obtained by the indication of TPC-command.

Besides the transmission power, the NR configures the time-frequency resource of the uplink reference signal through a high-level signaling, that is, the terminal device determines the time-frequency resource of the uplink reference signal through configuration values of different fields in the high-level signaling. The time-frequency resource refers to the distribution of time-domain resources and the distribution of frequency-domain resources in a time unit, and the distribution of frequency-domain resources can be determined by parameters such as the initial position of the frequency-domain resources, the offset of frequency-domain subcarriers, the offset of frequency-domain sequences, whether the frequency-domain sequences hop or not, and the like. The distribution of the time domain resources can be determined by parameters such as the initial position of the time domain symbols, the number of the time domain symbols and the like.

Generally, the fields in higher layer signaling are: nrofSymbols, i.e., the number of time domain symbols, taking the uplink reference signal as SRS as an example, the number of time domain symbols occupied in each time unit may be 1,2 or 4, startPosition, the start position of the time domain symbol, freqDomainPosition, i.e., the position of the frequency domain symbol, freqDomainShift, i.e., the subcarrier offset in the frequency domain, transmissionComb, i.e., the offset value of the frequency domain sequence, and resource type, i.e., the type of uplink reference signal resource allocation, which may be periodic, aperiodic, or semi-persistent, groupoqueueserving, i.e., the mode of uplink reference signal frequency hopping, which may be non-frequency hopping, or frequency hopping according to the time domain sequence, etc.

5. Antenna parameters

When the terminal device sends the PUSCH to the network device, the network device may determine the antenna port through which the terminal device sends the PUSCH after receiving the SRS sent by different ports. Illustratively, after receiving 4 different SRS ports, the network device determines the number of parallel data streams for uplink transmission of the terminal device by detecting the received signal powers of 4 SRSs and comprehensively considering uplink interference of other terminal devices, and selects a corresponding number of SRS resources from the 4 SRS beam directions, for example: and the network equipment instructs the terminal equipment to select beams corresponding to SRS 2 and 3 by indicating that the index value of the SRI is 9, and performs PUSCH transmission of the two data streams.

6. Time frequency resource

In the embodiment of the present application, data or information may be carried by time-frequency resources, where the time-frequency resources may include resources in a time domain and resources in a frequency domain. In the time domain, the time-frequency resource may include one or more time-domain units (or may also be referred to as time units), and in the frequency domain, the time-frequency resource may include frequency-domain units.

One time domain unit (also referred to as a time unit) may be one symbol or several symbols, or one mini-slot (mini-slot), or one slot (slot), or one subframe (subframe), where the duration of one subframe in the time domain may be 1 millisecond (ms), one slot may be composed of 7 or 14 symbols, and one mini-slot may include at least one symbol (e.g., 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols). The time domain unit size is only listed for convenience of understanding the scheme of the embodiment of the present application, and should not be understood as limiting the present invention, and it should be understood that the time domain unit size may be other values, and the embodiment of the present application is not limited.

A frequency domain unit may be a Resource Block (RB), or a group of Resource Blocks (RBG), or a predefined subband (subband).

The related concepts related to uplink data demodulation are introduced above, and the following describes in detail the technical solution of uplink data demodulation provided in the embodiment of the present application with reference to fig. 2.

S201, the terminal device sends SRS to the network device.

Wherein, the terminal device may transmit the SRS periodically.

Alternatively, the terminal device may transmit the SRS in an aperiodic manner, that is, the terminal device may transmit the SRS after receiving the network device indication information.

In this application, the SRS may be an SRS for channel sounding, and the SRS is used for demodulating information carried by an uplink channel in addition to the channel sounding.

For example, after receiving the SRS, the network device detects Channel quality of an uplink Channel, and determines a scheduling parameter of PUSCH transmission of the terminal device in consideration of interference of the uplink transmission, for example, the scheduling parameter may include but is not limited to a Modulation and Coding Scheme (MCS) or information such as resource allocation, and sends the scheduling parameter to the terminal through a Downlink Control Channel (PDCCH); the terminal equipment transmits an uplink channel according to the indication of Downlink Control Information (DCI) carried in the PDCCH; after receiving an uplink channel, the network device performs joint channel estimation according to the SRS and the DMRS in the uplink channel, and demodulates information carried in the uplink channel.

It should be noted that the uplink channel may include a PUSCH.

Alternatively, the uplink channel may include a PUCCH.

Alternatively, the uplink channel may include both PUCCH and PUSCH.

Optionally, the network device may send indication information to the terminal device, where the indication information may be used to indicate that the SRS can be used for demodulation, and thus, the terminal device may send the SRS for the network device to demodulate the uplink channel according to the indication information. The indication message may be a higher layer signaling, or the indication Information may also be carried in Downlink Control Information (DCI), for example, a field for carrying the indication Information may be added to the existing indication Information, or a redundant field in the DCI may also be used to carry the indication Information, which is not particularly limited in the embodiment of the present application.

Optionally, in this embodiment, the uplink channel used by the SRS for demodulation may be an uplink channel in the first time unit or the second time unit.

For example, when the SRS is carried in the first time unit, the uplink channel used by the SRS for demodulation may be the uplink channel carried in the first time unit, or the uplink channel used by the SRS for demodulation may be the uplink channel carried in the second time unit.

The second time unit may be a first time unit after the first time unit.

Or, the second time unit may be the tth time unit after the first time unit, where the value of T may be a value preset by the terminal device or the network device, or the value of T may also be notified to the terminal device by the network device.

Optionally, in this embodiment of the present application, the uplink channel used by the SRS for demodulation may be an uplink channel in a period of time. Wherein a period of time may include one or more time units.

For example, when the SRS is carried in the first time unit, the uplink channel used by the SRS for demodulation may be an uplink channel in N time units from the first time unit, or the uplink channel used by the SRS for demodulation may be an uplink channel in N time units from the second time unit.

Optionally, the value of N may be a value preset by the terminal device or the network device, or the value of N may also be notified to the terminal device by the network device.

The second time unit may be a first time unit after the first time unit.

S202, the terminal equipment sends an uplink channel to the network equipment.

Optionally, in order to ensure performance of demodulation on the uplink channel based on the SRS, in this embodiment of the present application, the transmission parameters of the uplink channel may be the same as the transmission parameters of the SRS, so that the SRS and the uplink channel have the same or similar channel state, or so that the SRS and the uplink channel experience the same or similar spatial fading.

The transmission parameter may include at least one of a transmission power, an antenna port, a precoding matrix, or a frequency domain resource.

For example, the transmission power of the uplink channel is the same as the transmission power of the SRS (i.e., condition 1).

For another example, the antenna port of the uplink channel is the same as the antenna port of the SRS (i.e., condition 2).

For another example, the precoding matrix of the uplink channel is the same as the precoding matrix of the SRS (i.e., condition 3).

For another example, the frequency domain resource of the uplink channel is the same as the frequency domain resource of the SRS (i.e., condition 4).

That is, the transmission parameters of the uplink channel and the transmission parameters of the SRS may satisfy at least one of the above conditions 1 to 4.

For example, the transmission parameters of the uplink channel and the transmission parameters of the SRS may satisfy the above conditions 1 and 2 at the same time, or satisfy the above conditions 1 and 3 at the same time, or satisfy the above conditions 1 and 4 at the same time, or satisfy the above conditions 2 and 3 at the same time, or satisfy the above conditions 2 and 4 at the same time, or satisfy the above conditions 1,2 and 3 at the same time, or satisfy the above conditions 1,2 and 4 at the same time, or satisfy the above conditions 1, 3 and 4 at the same time, or satisfy the above conditions 2,3 and 4 at the same time, or satisfy the above conditions 1,2,3 and 4 at the same time.

In addition, in the embodiment of the present application, the network device may further indicate, to the terminal device, the transmission parameter of the uplink channel demodulated using the SRS, and for example, the network device may indicate, to the terminal device, the transmission parameter corresponding to the second time unit, so as to ensure that the transmission parameter of the uplink channel demodulated using the SRS is the same as the transmission parameter of the SRS. For example, the network device may indicate the transmission parameters of the uplink channel demodulated by using the SRS through higher layer signaling, or the network device may indicate the transmission parameters of the uplink channel demodulated by using the SRS through DCI.

S203, the network device demodulates the uplink channel (i.e. the uplink channel carried in the second time unit) according to the SRS

It should be noted that the network device may demodulate the uplink channel only according to the SRS.

Alternatively, the network device may jointly (or in other words, jointly) demodulate the uplink channel according to both the SRS and the DMRS included in the uplink channel.

In addition, the network device may also perform channel estimation on the uplink channel according to the SRS, and then demodulate the uplink channel.

Alternatively, the network device may perform channel estimation on the uplink channel according to the SRS and the DMRS included in the uplink channel, and then demodulate the uplink channel according to the channel estimation and the two reference signals.

Compared with the prior art in which the uplink channel is demodulated only according to the DMRS in the uplink channel, the uplink transmission method provided in the embodiment of the present application can demodulate the uplink channel by using the SRS, so that the overhead of the DMRS in the uplink channel is not increased, the demodulation performance of the network device is improved, and the efficiency of uplink transmission in the wireless communication process is improved.

The following specifically describes the implementation process of the embodiment of the present application by taking the uplink channel as PUSCH as an example, with reference to fig. 3.

S301, the network equipment sends indication information to the terminal equipment, and indicates the SRS to be used for demodulation of the PUSCH.

Specifically, the indication information may be used to instruct the terminal device to transmit SRS and PUSCH, and the SRS is used to demodulate data transmitted by the terminal device on the PUSCH.

Illustratively, the period of the SRS may be configured by the network device as 5 time units, i.e., the SRS is used to demodulate data of PUSCH in 2 nd to 5th time units after the time unit carrying the SRS.

Illustratively, the network device may add a field, for example, one bit, in higher layer signaling, for example, in an information element of the SRS resource configured by RRC signaling, to indicate the function of the SRS, that is, the SRS is used to demodulate data of the PUSCH; it may also be in higher layer signaling, for example, a value may be added to an information element related to SRS resource in RRC signaling to indicate the function of SRS, that is, SRS is used to demodulate data of PUSCH, and, for example, a value of SRS _ function _ dmrs may be added to SRS-resource set:: usage: { codebook, nonodebook, beamformation, antenna switching, SRS _ function _ dmrs }.

S302, the terminal equipment sends SRS to the network equipment.

Specifically, after receiving the indication information, the terminal device transmits an SRS for demodulating the PUSCH, and illustratively, the terminal device transmits the SRS at its corresponding antenna port according to the SRS resource configured by the network device. The network device may configure the terminal device to use 1 SRS resource, or use 2 SRS resources, or use 4 SRS resources, and generally, the network device may only configure the SRS resources in the last 6 time domain symbols of a time slot, and the SRS resources occupy continuous time domain symbols in the time domain. The SRS can select different frequencies in the frequency domain to obtain a larger sounding bandwidth.

In the non-codebook transmission, the terminal device measures a downlink channel according to a downlink reference signal sent by the network device, determines the precoding of the uplink-transmitted SRS according to the measured value of the downlink channel, and finally sends the precoded SRS.

S303, the network equipment sends SRI to the terminal equipment, wherein the SRI is used for indicating a sending port of the PUSCH

Specifically, after receiving the SRS transmitted by the terminal device, the network device detects the received power of all the received SRS, determines the number of parallel data streams transmitted by the terminal device in uplink by taking uplink interference of other terminal devices into consideration, and selects a spatial domain resource of the PUSCH, i.e., a transmission port of the PUSCH, from the SRS beam direction.

Illustratively, in non-codebook transmission, the network device may indicate a port used by the terminal device for transmitting PUSCH by an index value of the SRI.

S304, the terminal device determines the transmission parameters of the PUSCH, such as the transmission power, the precoding matrix, or the frequency domain resources.

In the embodiment of the present application, the transmission parameters (e.g., transmission power) of the terminal device for transmitting the PUSCH directly use the transmission parameters (e.g., transmission power) of the SRS, so as to ensure that the terminal device does not cause random phase jump due to power variation during uplink transmission, and the PUSCH uses the same frequency domain resources as the SRS, so as to ensure that a channel experienced by SRS transmission and a channel experienced by PUSCH transmission are completely the same.

In the non-codebook transmission, the PUSCH instructed by the SRI is transmitted, and the PUSCH is precoded with the same precoding matrix as that of the SRS.

And according to the parameters, the terminal equipment sends the PUSCH.

S305, the terminal device transmits the PUSCH using the transmission parameter.

The specific implementation of this step may be the same as or similar to S202 described above, and is not described herein again. It should be noted that the partial time element in the PUSCH transmitted by the terminal device may not include the DMRS used for the demodulated PUSCH data. The time unit may be a time domain symbol, a time slot, or a sub-time slot.

S306, the network equipment demodulates the information carried by the PUSCH according to the SRS.

Specifically, the network device receives the SRS in a first time unit and receives the PUSCH in several subsequent adjacent time units, and at this time, the network device may demodulate the data of the PUSCH according to the SRS.

Optionally, the network device may also use the SRS and the DMRS in the PUSCH at the same time to jointly demodulate data in the PUSCH.

Illustratively, demodulating the information carried by the PUSCH according to the SRS and the DMRS may be:

the network equipment performs channel estimation on the channels of the PUSCHs received in the 2 nd to 5th time units according to the SRS received in the 1 st time unit, and performs data demodulation on the PUSCHs received in the 2 nd to 5th time units according to the channel estimation; the network device may perform joint channel estimation on the channel of the PUSCH according to the SRS received in the 1 st time element and the DMRS included in the PUSCH received in the 2 nd to 5th time elements, and then perform data demodulation on the PUSCH received in the 2 nd to 5th time elements according to the channel estimation, which is not specifically limited in the embodiment of the present application.

When the SRS for time slot 1 and the transmission parameter of the PUSCH for the time slot are the same, the network device may demodulate the data of the PUSCH for the time slot based on the SRS.

According to the embodiment of the application, the existing SRS can be multiplexed while pilot frequency overhead of the DMRS is not increased, the network equipment is assisted to carry out PUSCH data demodulation and/or channel estimation, and the transmission efficiency of the PUSCH is improved.

In addition, when the uplink channel is the PUCCH, the specific steps are as follows:

1. when the network side configures a high layer signaling parameter PUCCH-spatialiationinfo with a value of SRS, the terminal is instructed to use the spatialiationinfo which is the same as that of the SRS, that is, the same transmission port, when the PUCCH is transmitted, so that the PUCCH and the SRS experience exactly the same spatial fading.

2. When receiving a value SRS of a high-level parameter PUCCH-spatiallationinfo configured by a network side, a terminal device transmits a PUCCH by using a configuration complete with a transmitted SRS, where the configuration includes a transmission port, power, resources, and the like.

3. And after receiving the SRS and the PUCCH, the network side equipment performs joint channel estimation and demodulation on the PUCCH according to the DMRS in the SRS and the PUCCH. Alternatively, the network device may perform channel estimation and demodulation on the PUCCH only according to the SRS.

In addition, other steps and processing procedures may be similar to the case where the uplink channel is the PUSCH, and here, detailed descriptions thereof are omitted to avoid redundancy.

In addition, when the uplink channel is PUCCH and PUSCH, the specific steps are as follows:

a. a network side configures a high-level signaling parameter PUCCH-spatiallationinfo with a value of SRS, and instructs a terminal to transmit the PUCCH by adopting a port (equivalently precoding) same as the SRS; the network side configures SRS-resource set, wherein the usage value is nomicodewood, and the terminal is instructed to transmit PUSCH by adopting the same precoding as the SRS;

b. after receiving the high-level signaling configuration, the terminal equipment learns that the DMRS of the PUCCH, the DMRS of the PUSCH and the SRS need to perform joint channel estimation, and therefore the terminal equipment can transmit the PUCCH and the PUSCH with the same transmission power, antenna port and frequency domain resources.

c. After receiving the PUCCH and the PUSCH, the network side performs joint channel estimation and demodulates the PUCCH and the PUSCH based on the DMRS of the PUCCH, the DMRS of the PUSCH and the SRS received before. Alternatively, the network device may perform channel estimation and demodulation on the PUCCH and/or PUSCH only according to the SRS. Alternatively, the network device may also perform channel estimation and demodulation on the PUSCH according to the SRS and the DMRS in the PUCCH. Alternatively, the network device may also perform channel estimation and demodulation on the PUCCH according to the SRS and the DMRS in the PUSCH. Alternatively, the network device may also perform channel estimation and demodulation on the PUSCH according to the SRS and the DMRS in the PUSCH. Alternatively, the network device may also perform channel estimation and demodulation on the PUCCH according to the SRS and the DMRS in the PUCCH.

Fig. 4 is a schematic block diagram of an uplink channel demodulation apparatus according to an embodiment of the present application. The apparatus 400 comprises a transceiver unit 410 and a processing unit 420. The transceiving unit 410 may communicate with the outside, and the processing unit 420 is used to perform data processing. The transceiving unit 410 may also be referred to as a communication interface or a communication unit.

Optionally, the apparatus 400 may further include a storage unit, which may be used to store instructions or/and data, and the processing unit 420 may read the instructions or/and data in the storage unit.

The apparatus 400 may be configured to perform the actions performed by the network device in the foregoing method embodiments, in this case, the apparatus 400 may be a network device or a component configurable in the network device, the transceiver 410 is configured to perform the transceiving-related operations on the network device side in the foregoing method embodiments, and the processing unit 420 is configured to perform the processing-related operations on the network device side in the foregoing method embodiments.

Alternatively, the apparatus 400 may be configured to perform the actions performed by the terminal device in the foregoing method embodiment, in this case, the apparatus 400 may be a terminal device or a component configurable in the terminal device, the transceiver 410 is configured to perform the operations related to transceiving of the terminal device side in the foregoing method embodiment, and the processing unit 420 is configured to perform the operations related to processing of the terminal device side in the foregoing method embodiment.

As a design, the apparatus 400 is configured to perform the actions of the network device in the embodiment shown in fig. 2 or fig. 3, where the transceiver unit 410 is configured to receive a sounding reference signal, SRS, sent by the terminal device, and is configured to receive an uplink channel sent by the terminal device; the processing unit 420 is configured to demodulate the information carried by the uplink channel by using the SRS.

As another design, the apparatus 400 is configured to perform the actions of the terminal device in the embodiment shown in fig. 2 or fig. 3 above, and the transceiving unit 410 is configured to transmit a sounding reference signal, SRS, to a network device, and to transmit an uplink channel to the network device; wherein the SRS is used for demodulation of the uplink channel.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and the demodulation of the uplink channel is performed based on the SRS and the DMRS.

Optionally, the SRS is located at a first time unit and the DMRS is located at a second time unit, wherein,

the first time unit and the second time unit are adjacent time units, or

K time units spaced between the first time unit and the second time unit, K being a positive integer and K being less than or equal to a first threshold, wherein the first threshold is predefined by a communication protocol or indicated by a network device.

transmission power, antenna ports, precoding matrix, frequency domain resources.

As shown in fig. 5, an embodiment of the present application further provides a communication apparatus 500. The communication device 500 comprises a processor 510, the processor 510 is coupled to a memory 520, the memory 520 is configured to store computer programs or instructions or/and data, and the processor 510 is configured to execute the computer programs or instructions and/or data stored by the memory 520, so that the method in the above method embodiment is performed.

Optionally, the communication device 500 includes one or more processors 510.

Optionally, as shown in fig. 5, the communication device 500 may further include a memory 520.

Optionally, the communication device 500 may include one or more memories 520.

Alternatively, the memory 520 may be integrated with the processor 510 or separately provided.

Optionally, as shown in fig. 5, the wireless communication apparatus 500 may further include a transceiver 530, and the transceiver 530 is used for receiving and/or transmitting signals. For example, processor 510 may be configured to control transceiver 530 to receive and/or transmit signals.

As an approach, the communication apparatus 500 is used to implement the operations performed by the network device in the above method embodiments.

For example, processor 510 is configured to implement processing-related operations performed by a network device in the above method embodiments, and transceiver 530 is configured to implement transceiving-related operations performed by a network device in the above method embodiments.

Alternatively, the communication apparatus 500 is configured to implement the operations performed by the terminal device in the above method embodiments.

For example, the processor 510 is configured to implement processing-related operations performed by the terminal device in the above method embodiments, and the transceiver 530 is configured to implement transceiving-related operations performed by the terminal device in the above method embodiments.

The embodiment of the present application further provides a communication apparatus 600, and the communication apparatus 600 may be a terminal device or a chip. The communication apparatus 600 may be used to perform the operations performed by the terminal device in the above method embodiments. When the communication apparatus 600 is a terminal device, fig. 6 shows a simplified structure diagram of the terminal device. For easy understanding and illustration, in fig. 6, the terminal device is exemplified by a mobile phone. As shown in fig. 6, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 6, and one or more processors and one or more memories may be present in an actual end device article. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device.

As shown in fig. 6, the terminal device includes a transceiving unit 610 and a processing unit 620. The transceiver unit 610 may also be referred to as a transceiver, a transceiving device, etc. The processing unit 620 may also be referred to as a processor, a processing board, a processing module, a processing device, etc.

Alternatively, a device for implementing a receiving function in the transceiver unit 610 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver unit 610 may be regarded as a transmitting unit, that is, the transceiver unit 610 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

For example, in one implementation, the transceiving unit 610 is configured to perform a receiving operation of the terminal device in fig. 2 to 3. The processing unit 620 is configured to perform processing actions on the terminal device side in fig. 2 to 3.

It should be understood that fig. 6 is only an example and not a limitation, and the terminal device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 6.

When the communication device 600 is a chip, the chip includes a transceiving unit and a processing unit. The transceiving unit can be an input/output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

The embodiment of the present application further provides a communication apparatus 700, where the communication apparatus 700 may be a network device or a chip. The communication apparatus 700 may be used to perform the operations performed by the network device in the above method embodiments.

When the communication device 700 is a network device, it is a base station, for example. Fig. 7 shows a simplified base station structure. The base station includes a 710 section and a 720 section. 77 is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 720 part is mainly used for baseband processing, base station control and the like. Portion 710 may be generally referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc. Part 720 is generally a control center of the base station, and may be generally referred to as a processing unit, for controlling the base station to perform the processing operations on the network device side in the above method embodiments.

The transceiver unit of part 710, which may also be referred to as a transceiver or transceiver, includes an antenna and radio frequency circuitry, where the radio frequency circuitry is primarily used for radio frequency processing. Alternatively, the device for implementing the receiving function in the part 710 may be regarded as a receiving unit, and the device for implementing the transmitting function may be regarded as a transmitting unit, that is, the part 710 includes a receiving unit and a transmitting unit. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like, and a transmitting unit may be referred to as a transmitter, a transmitting circuit, or the like.

Section 720 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control of the base station. If a plurality of single boards exist, the single boards can be interconnected to enhance the processing capacity. As an alternative implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver unit of part 710 is configured to perform transceiving-related steps performed by the network device in the embodiments shown in fig. 2 to 3; section 720 is used to perform the processing-related steps performed by the network device in the embodiments shown in fig. 2-3.

It should be understood that fig. 7 is only an example and not a limitation, and the network device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 7.

When the communication device 700 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.

Embodiments of the present application also provide a computer-readable storage medium, on which computer instructions for implementing the method performed by the terminal device or the method performed by the network device in the foregoing method embodiments are stored.

For example, the computer program, when executed by a computer, causes the computer to implement the method performed by the terminal device or the method performed by the network device in the above-described method embodiments.

Embodiments of the present application also provide a computer program product containing instructions, where the instructions, when executed by a computer, cause the computer to implement the method performed by the terminal device or the method performed by the network device in the foregoing method embodiments.

An embodiment of the present application further provides a communication system, where the communication system includes the network device and the terminal device in the foregoing embodiments.

As an example, the communication system includes: the network device and the terminal device in the embodiments described above in connection with fig. 2 to 3.

For the explanation and beneficial effects of the related contents in any wireless communication device, reference may be made to the corresponding method embodiments provided above, and details are not repeated here.

In the embodiment of the present application, the terminal device or the network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer may include hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer may include applications such as a browser, an address book, word processing software, and instant messaging software.

The embodiment of the present application does not particularly limit a specific structure of an execution subject of the method provided by the embodiment of the present application, as long as communication can be performed by the method provided by the embodiment of the present application by running a program in which codes of the method provided by the embodiment of the present application are recorded. For example, an execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling a program and executing the program in the terminal device or the network device.

Various aspects or features of embodiments of the application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.).

Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to: wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

It should be understood that the processor mentioned in the embodiments of the present application may be a Central Processing Unit (CPU), and may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM). For example, RAM can be used as external cache memory. By way of example and not limitation, RAM may include the following forms: static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct bus RAM (DR RAM).

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

It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

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 technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments 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 embodiments of 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, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including several 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 methods described in 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 protection 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 disclosed in the embodiments of the present application, and shall all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

An uplink channel demodulation method, comprising:

receiving a Sounding Reference Signal (SRS) sent by terminal equipment;

receiving an uplink channel sent by terminal equipment;

and demodulating the information carried by the uplink channel by using the SRS.
The method of claim 1, wherein the uplink channel comprises a demodulation reference signal (DMRS), and

demodulating the information carried by the uplink channel by using the SRS, including:

and demodulating the information carried by the uplink channel by using the SRS and the DMRS.
The method according to claim 1 or 2, characterized in that the SRS is also used for channel estimation of the uplink channel.
The method of any of claims 1 to 3, wherein the uplink channel employs the same transmission parameters as the SRS, and wherein the transmission parameters include at least one of:

transmit power, antenna ports, precoding matrix, or frequency domain resources.
The method according to any of claims 1 to 4, wherein the uplink channel comprises at least one of an uplink shared channel, PUSCH, and an uplink control channel, PUCCH.
An uplink channel transmission method, comprising:

sending a Sounding Reference Signal (SRS) to network equipment;

sending an uplink channel to the network device;

wherein, the SRS is used for demodulating the information carried by the uplink channel.
The method of claim 6, wherein the uplink channel comprises a demodulation reference signal (DMRS), and wherein demodulation of information carried by the uplink channel is based on the SRS and the DMRS.
The method of claim 6 or 7, wherein the SRS is also used for channel estimation of the uplink channel.
The method of uplink transmission according to any of claims 6 to 8, wherein the uplink channel employs the same transmission parameters as the SRS, and the transmission parameters include at least one of the following parameters:

transmit power, antenna ports, precoding matrix, or frequency domain resources.
The method for uplink transmission according to any of claims 6 to 9, wherein the uplink channel comprises at least one of an uplink shared channel, PUSCH, and an uplink control channel, PUCCH.
An uplink channel demodulation apparatus, comprising:

a receiving and sending unit, configured to receive a sounding reference signal SRS sent by a terminal device, and receive an uplink channel sent by the terminal device;

and the processing unit is used for demodulating the information carried by the uplink channel by using the SRS.
The apparatus of claim 11, wherein the uplink channel comprises a demodulation reference signal (DMRS), and

the processing unit is specifically configured to demodulate the uplink channel according to the SRS and the DMRS.
The apparatus of claim 11 or 12, wherein the SRS is also used for channel estimation of the uplink channel.
The apparatus of any one of claims 11 to 13, wherein the uplink channel employs the same transmission parameters as the SRS, and wherein the transmission parameters include at least one of:

transmit power, antenna ports, precoding matrix, or frequency domain resources.
The apparatus according to any one of claims 11 to 14, wherein the uplink channel comprises at least one of an uplink shared channel, PUSCH, and an uplink control channel, PUCCH.
An uplink channel transmission device, comprising:

a transceiver unit, configured to send a sounding reference signal SRS to a network device, and send an uplink channel to the network device;

wherein, the SRS is used for demodulating the information carried by the uplink channel.
The apparatus of claim 16, wherein the uplink channel contains a demodulation reference signal (DMRS), and wherein demodulation of information carried by the uplink channel is based on the SRS and the DMRS.
The apparatus of claim 16 or 17, wherein the SRS is also used for channel estimation of the uplink channel.
The apparatus of uplink transmission according to any of claims 16 to 18, wherein the uplink channel employs the same transmission parameters as the SRS, and the transmission parameters include at least one of the following parameters:

transmit power, antenna ports, precoding matrix, or frequency domain resources.
The apparatus for uplink transmission according to any of claims 16 to 19, wherein the uplink channel comprises at least one of an uplink shared channel, PUSCH, and an uplink control channel, PUCCH.
A wireless communication apparatus comprising a processor coupled with a memory, the memory to store a computer program or instructions, the processor to execute the computer program or instructions in memory such that

The method of any one of claims 1 to 5 being performed, or

The method of any of claims 6 to 10 being performed.
A computer-readable storage medium, characterized in that a computer program or instructions for implementing

The method of any one of claims 1 to 5, or

The method of any one of claims 6 to 10.
A chip system, comprising: a processor for calling and running the computer program from the memory,

causing the communication device in which the chip system is installed to execute

The method of any one of claims 1 to 5, or

The method of any one of claims 6 to 10.