WO2020052514A1

WO2020052514A1 - Information sending method, information receiving method, and device

Info

Publication number: WO2020052514A1
Application number: PCT/CN2019/104896
Authority: WO
Inventors: 刘显达; 刘鹍鹏
Original assignee: 华为技术有限公司
Priority date: 2018-09-10
Filing date: 2019-09-09
Publication date: 2020-03-19
Also published as: CN110891312B; CN110891312A

Abstract

Embodiments of the present application describe an information sending method, a receiving method, and a device, for improving performance of receiving an uplink demodulation reference (DM-RS) signal, and accordingly further improving performance of channel estimation. The method and the device comprise: a terminal apparatus receiving downlink control information (DCI) comprising an uplink physical resource of a first time interval; the terminal apparatus sending data information and a DM-RS on the uplink physical resource, the number of frequency-domain units occupied by the DM-RS being less than the number of frequency-domain units of the uplink physical resource; and at the same time, the terminal apparatus sending a reference signal in a second time interval, wherein at least one portion of frequency-domain units occupied by the reference signal overlaps with at least one portion of the frequency-domain units of the uplink physical resource of the first time interval, and the frequency-domain units occupied by the reference signal comprise at least one portion of the frequency-domain units of the uplink physical resource that are not occupied by the DM-RS. The reference signal and the DM-RS are used for joint channel estimation.

Description

Information sending method, information receiving method and device

Technical field

The embodiments of the present application relate to mobile communication technologies, and in particular, to an information sending method, an information receiving method, and an apparatus.

Background technique

In the new radio access technology (NR) system of the 3rd Generation Partnership Project (3GPP), system resources are divided into multiple orthogonal frequency division multiplexing multiple accesses in time. Orthogonal Frequency Division Multiplex (OFDM) symbols are divided into several subcarriers from the frequency. The physical downlink control channel (PDCCH) in the downlink usually occupies the first two or the first three OFDM symbols in a subframe. The PDCCH is used to carry Downlink Control Information (DCI). The DCI carries UE-specific resource allocation information and UE-specific or other control information shared by the cell. The physical uplink shared channel (PUSCH) in the uplink is used to carry uplink data. Usually, discrete Fourier transform extended OFDM (DFT-Spread OFDM, DFT-S-OFDM) is used to generate frequency domain signals. . Generally, a slot typically includes 14 OFDM symbols. The system also defines the size of a physical resource block (PRB). A PRB contains 12 subcarriers in the frequency domain. A subcarrier within a certain OFDM symbol is called a resource element (RE).

A demodulation reference signal (Demodulation Reference Signal, DM-RS) is used to perform channel estimation and channel quality and spatial characteristic derivation during data demodulation. Generally, for the uplink, the DM-RS and its corresponding PUSCH are in the same time unit, and are located before the PUSCH and nested in the PUSCH to ensure uplink data demodulation performance. In addition, the frequency domain resources occupied by the PUSCH are the same as the corresponding DM-RS resources to ensure the accuracy of the frequency domain channel estimation. The DM-RS in the NR and the corresponding data channel use the same number of precoding and transmission ports. Among the uplinks, the base station simultaneously indicates the number of DM-RS and PUSCH precoding and transmission ports by scheduling the DCI of the data channel. The number of transmission ports corresponds to the number of transmission layers. At this time, the DM-RS and PUSCH use the same transmission port.

When the terminal equipment is at the cell edge, the performance of channel estimation will directly affect the coverage problem. If the DM-RS and the corresponding PUSCH occupy the same frequency domain resources, it may affect the use of DM-RS channel estimation due to the limited uplink transmit power. Performance. Reducing the carrier frequency resources occupied by DM-RS on an OFDM symbol and occupying more OFDM symbols Although the DM-RS transmission power can be improved, when DFT-S-OFDM is used in the uplink, PUSCH and DM-RS cannot In the frequency division multiplexing transmission method, the above method will result in that multiple OFDM symbols transmitting DM-RS within a time unit cannot be used to transmit the PUSCH, thereby affecting the PUSCH transmission efficiency and the time-frequency resource utilization efficiency of the network.

Summary of the Invention

An information sending method, information receiving method, and device described in the embodiments of the present application are used to improve the receiving performance of the uplink demodulation reference signal DM-RS, thereby further improving the performance of channel estimation and ultimately improving the receiving performance of uplink data information. , Such as the decoding success rate of uplink data information.

In a first aspect, an embodiment of the present invention provides a method for sending information. The method includes a terminal device receiving first downlink control information DCI, where the first DCI includes information about a first uplink physical resource in a first time period; A first demodulation reference signal DM-RS and first data information are sent on the uplink physical resource, and a reference signal is sent in the second time period. The number of frequency domain units M occupied by the first DM-RS is less than or equal to the first uplink physical The number N of frequency domain units of the resource, at least a part of the frequency domain unit occupied by the reference signal overlaps with at least a part of the frequency domain unit of the first uplink physical resource, and M, N are integers greater than or equal to 1. On the one hand, the bandwidth of the DM-RS is smaller than the bandwidth of the first physical uplink resource, which can increase the transmission power of the DM-RS, especially for the terminal equipment at the cell edge, which can improve the reception performance of the DM-RS. In addition, the reference signal and DM- RS joint channel estimation can improve the channel estimation performance, which is beneficial to demodulating the first data information transmitted on the first uplink physical resource.

In a possible design, before receiving the DCI, the method further includes: receiving configuration information of a reference signal, where the configuration information is used to indicate that the reference signal is used for demodulating data.

In a possible design, determine whether the number N of frequency domain units of the first uplink physical resource is greater than or equal to a pre-configured value; if the number N of frequency domain units of the first uplink physical resource is greater than or equal to a pre-configured value The value M determines that the number M of frequency domain units occupied by the first DM-RS is less than the number N of frequency domain units of the first uplink physical resource. It can be beneficial to reduce the number of frequency domain units occupied by the DM-RS, improve the transmission power of the DM-RS, and ensure the reception performance of the DM-RS when the bandwidth of the first uplink physical resource is relatively large.

In a possible design, determine whether the number N of frequency domain units of the first uplink physical resource is less than or equal to a pre-configured value; if the number N of frequency domain units of the first uplink physical resource is less than or equal to a pre-configured value The value M determines that the number M of frequency domain units occupied by the first DM-RS is equal to the number N of frequency domain units of the first uplink physical resource. It can ensure that the bandwidth of the first uplink physical resource is relatively small, and the receiving performance of the DM-RS. The pre-configured value may be pre-agreed or notified through signaling, and the pre-configured value may be related to the system bandwidth or the activated partial bandwidth (BWP), such as the system bandwidth or 1 / n of the BWP. , N takes an integer greater than 1.

In a possible design, the terminal device receives the second DCI, and the second DCI includes information about the second uplink physical resource in the third time period, and the third time period is after the first time period, and the second uplink physical resource is At least a part of the frequency domain unit of the frequency domain overlaps at least a part of the frequency domain unit of the first uplink physical resource; sending the second DM-RS and the second data information on the second uplink physical resource, and the frequency occupied by the second DM-RS The number of domain units is less than the number M of frequency domain units occupied by the first DM-RS. If there are uplink physical resources in continuous time periods, or uplink physical resources in time periods with a density greater than a certain degree, then the channel correlation within a period of time can be used in conjunction with the DM-RS of the previous period to perform joint channel estimation. , Further reducing the number of frequency domain units occupied by the DM-RS in the later period, which can further increase the transmission power of the DM-RS, and improve the demodulation of data information transmitted on the uplink physical resources in the later period. performance.

In a possible design, the terminal device has at least one time period between the first time period and the third time period, or all time periods, or K consecutive time periods, or cumulative K time periods DM-RS and data information are sent on the uplink physical resources, K is an integer greater than 1.

In a possible design, the terminal device sends DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period, and the at least one time The time interval between any two time periods among the time periods included in the first time period and the third time period is less than K, and K is an integer greater than or equal to 0.

In a second aspect, an embodiment of the present invention provides a method for receiving information. The method includes: a network device sends first downlink control information DCI, where the first DCI includes information about a first uplink physical resource in a first time period Receiving a first demodulation reference signal DM-RS and first data information sent by a terminal device on the first uplink physical resource, and receiving a reference signal in a second time period, the frequency occupied by the first DM-RS The number M of domain units is less than or equal to the number N of frequency domain units of the first uplink physical resource, at least a part of the frequency domain unit occupied by the reference signal and at least a frequency domain unit of the first uplink physical resource Some overlap, and M and N are integers greater than or equal to 1. On the one hand, the bandwidth of the DM-RS is smaller than the bandwidth of the first physical uplink resource, which can increase the transmission power of the DM-RS, especially for the terminal equipment at the cell edge, which can improve the reception performance of the DM-RS. In addition, the reference signal and DM- RS joint channel estimation can improve the channel estimation performance, which is beneficial to demodulating the first data information transmitted on the first uplink physical resource.

In a possible design, before sending the DCI, the method further includes: sending configuration information of a reference signal, where the configuration information is used to indicate that the reference signal is used to demodulate data.

In a possible design, determine whether the number N of frequency domain units of the first uplink physical resource is less than or equal to a pre-configured value; if the number N of frequency domain units of the first uplink physical resource is less than or equal to a pre-configured value The value M determines that the number M of frequency domain units occupied by the first DM-RS is equal to the number N of frequency domain units of the first uplink physical resource. It can ensure that the bandwidth of the first uplink physical resource is relatively small, and the receiving performance of the DM-RS.

In a possible design, the network device sends a second DCI, where the second DCI includes information about a second uplink physical resource in a third time period, and the third time period is after the first time period, so At least a part of the frequency domain unit of the second uplink physical resource overlaps with at least a part of the frequency domain unit of the first uplink physical resource; receiving a second DM-RS and second data information on the second uplink physical resource The number of frequency domain units occupied by the second DM-RS is less than the number of frequency domain units M occupied by the first DM-RS. If there are uplink physical resources in continuous time periods, or uplink physical resources in time periods with a density greater than a certain degree, then the channel correlation within a period of time can be used in conjunction with the DM-RS of the previous period to perform joint channel estimation. , Further reducing the number of frequency domain units occupied by the DM-RS in the later period, which can further increase the transmission power of the DM-RS, and improve the demodulation of data information transmitted on the uplink physical resources in the later period. performance.

In a possible design, the network device has at least one time period between the first time period and the third time period, or all time periods, or K consecutive time periods, or cumulative K time periods Receive DM-RS and data information on the uplink physical resources, K is an integer greater than 1.

In a possible design, the network device receives DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period, and the at least one time The time interval between any two time periods among the time periods included in the first time period and the third time period is less than K, and K is an integer greater than or equal to 0.

In a third aspect, an embodiment of the present application provides a communication device. The device includes: a processor and a transceiver coupled to the processor;

The processor is configured to receive first downlink control information DCI through the transceiver, where the first DCI includes information about a first uplink physical resource in a first time period; and the processor is further configured to pass the The transceiver sends a first demodulation reference signal DM-RS and first data information on the first uplink physical resource, and sends a reference signal in a second time period. The frequency domain unit occupied by the first DM-RS The number M is less than or equal to the number N of frequency domain units of the first uplink physical resource, at least a part of the frequency domain unit occupied by the reference signal overlaps with at least a part of the frequency domain unit of the first uplink physical resource, M, N is an integer greater than or equal to 1. On the one hand, the bandwidth of the DM-RS is smaller than the bandwidth of the first physical uplink resource, which can increase the transmission power of the DM-RS, especially for the terminal equipment at the cell edge, which can improve the reception performance of the DM-RS. RS joint channel estimation can improve the channel estimation performance, which is beneficial to demodulating the first data information transmitted on the first uplink physical resource. In a possible design, before receiving the DCI, the processor is further configured to receive configuration information of a reference signal through the transceiver, where the configuration information is used to indicate that the reference signal is used to demodulate data.

In a possible design, the processor is configured to determine whether the number N of frequency domain units of the first uplink physical resource is greater than or equal to a pre-configured value; if the frequency domain unit of the first uplink physical resource is The number N is greater than or equal to the pre-configured value, and it is determined that the number M of frequency domain units occupied by the first DM-RS is less than the number N of frequency domain units of the first uplink physical resource. It can be beneficial to reduce the number of frequency domain units occupied by the DM-RS, improve the transmission power of the DM-RS, and ensure the reception performance of the DM-RS when the bandwidth of the first uplink physical resource is relatively large.

In a possible design, the processor determines whether the number N of frequency domain units of the first uplink physical resource is less than or equal to a pre-configured value; if the number N of frequency domain units of the first uplink physical resource is It is less than or equal to a pre-configured value, and it is determined that the number M of frequency domain units occupied by the first DM-RS is equal to the number N of frequency domain units of the first uplink physical resource. It can ensure that the bandwidth of the first uplink physical resource is relatively small, and the receiving performance of the DM-RS.

In a possible design, the processor is configured to receive a second DCI through the transceiver, where the second DCI includes information about a second uplink physical resource in a third time period, and the third time period is in After the first time period, at least a part of the frequency domain unit of the second uplink physical resource overlaps with at least a part of the frequency domain unit of the first uplink physical resource; the processor is further configured to pass the The transceiver sends second DM-RS and second data information on the second uplink physical resource. The number of frequency domain units occupied by the second DM-RS is less than the frequency occupied by the first DM-RS. The number M of domain units. If there are uplink physical resources in continuous time periods, or uplink physical resources in time periods with a density greater than a certain degree, then the channel correlation within a period of time can be used in conjunction with the DM-RS of the previous period to perform joint channel estimation. , Further reducing the number of frequency domain units occupied by the DM-RS in the later period, which can further increase the transmission power of the DM-RS, and improve the demodulation of data information transmitted on the uplink physical resources in the later period. performance.

In a possible design, the processor is configured to, through the transceiver, be at least one time period between the first time period and the third time period, or all time periods, or K consecutive times DM-RS and data information are sent on uplink physical resources in the time period or cumulative K time periods, where K is an integer greater than 1.

In a possible design, the processor is configured to send the DM-RS and the uplink physical resources on at least one time period between the first time period and the third time period through the transceiver. Data information, and the time interval between any two of the at least one time period, the first time period and the third time period is less than K, and K is an integer greater than or equal to 0.

According to a fourth aspect, an embodiment of the present application provides a communication device. The communication device includes a processor and a transceiver coupled to the processor.

The processor is configured to send first downlink control information DCI through the transceiver, where the first DCI includes information about a first uplink physical resource in a first period of time; and the processor is further configured to pass through the transceiver The transceiver receives the first demodulation reference signal DM-RS and the first data information sent by the terminal device on the first uplink physical resource, and receives the reference signal in the second time period. The number M of frequency domain units is less than or equal to the number N of frequency domain units of the first uplink physical resource, and at least a part of the frequency domain unit occupied by the reference signal is different from that of the frequency domain unit of the first uplink physical resource. At least a part of them overlap, and M and N are integers greater than or equal to 1. On the one hand, the bandwidth of the DM-RS is smaller than the bandwidth of the first physical uplink resource, which can increase the transmission power of the DM-RS, especially for the terminal equipment at the cell edge, which can improve the reception performance of the DM-RS. In addition, the reference signal and DM- RS joint channel estimation can improve the channel estimation performance, which is beneficial to demodulating the first data information transmitted on the first uplink physical resource.

In a possible design, before sending the DCI, the processor is configured to send configuration information of a reference signal through the transceiver, where the configuration information is used to indicate that the reference signal is used to demodulate data.

In a possible design, the processor is configured to determine whether the number N of frequency domain units of the first uplink physical resource is greater than or equal to a pre-configured value; if the frequency domain unit of the first uplink physical resource is And the number M is greater than or equal to the pre-configured value, and it is determined that the number M of frequency domain units occupied by the first DM-RS is less than the number N of frequency domain units of the first uplink physical resource. It can be beneficial to reduce the number of frequency domain units occupied by the DM-RS, improve the transmission power of the DM-RS, and ensure the reception performance of the DM-RS when the bandwidth of the first uplink physical resource is relatively large.

In a possible design, the processor is configured to determine whether the number N of frequency domain units of the first uplink physical resource is less than or equal to a pre-configured value; if the number of frequency domain units of the first uplink physical resource is N is less than or equal to a pre-configured value, and it is determined that the number M of frequency domain units occupied by the first DM-RS is equal to the number N of frequency domain units of the first uplink physical resource. It can ensure that the bandwidth of the first uplink physical resource is relatively small, and the receiving performance of the DM-RS.

In a possible design, the processor is configured to send a second DCI through the transceiver, where the second DCI includes information about a second uplink physical resource in a third time period, and the third time period is in After the first time period, at least a part of the frequency domain unit of the second uplink physical resource overlaps with at least a part of the frequency domain unit of the first uplink physical resource; the processor is further configured to pass the The transceiver receives second DM-RS and second data information on the second uplink physical resource, and the number of frequency domain units occupied by the second DM-RS is less than the frequency occupied by the first DM-RS The number M of domain units. If there are uplink physical resources in continuous time periods, or uplink physical resources in time periods with a density greater than a certain degree, then the channel correlation within a period of time can be used in conjunction with the DM-RS of the previous period to perform joint channel estimation. , Further reducing the number of frequency domain units occupied by the DM-RS in the later period, which can further increase the transmission power of the DM-RS, and improve the demodulation of data information transmitted on the uplink physical resources in the later period. performance.

In a possible design, the processor is configured to, through the transceiver, be at least one time period between the first time period and the third time period, or all time periods, or K consecutive times DM-RS and data information are received on uplink physical resources in the time period or cumulative K time periods, and K is an integer greater than 1.

In a possible design, the processor is configured to receive the DM-RS and the uplink physical resources on at least one time period between the first time period and the third time period through the transceiver. Data information, and the time interval between any two of the at least one time period, the first time period and the third time period is less than K, and K is an integer greater than or equal to 0.

In combination with the above aspects and possible designs, in a possible design, the frequency domain units occupied by the reference signal include frequency domain units of the first uplink physical resource that are not occupied by the first DM-RS. At least part of it. By complementing the frequency domain unit occupied by the DM-RS and the frequency domain unit occupied by the reference signal in the frequency domain, channel information of more frequency domain units in the frequency domain unit of the first uplink physical resource can be obtained, which is beneficial to Demodulate the first data information transmitted on the first uplink physical resource.

Combining the above aspects and possible designs, in a possible design, in a possible design, the frequency domain unit occupied by the first DM-RS and the frequency domain unit occupied by the reference signal do not completely overlap, that is, At least part of the frequency domain units occupied by the reference signal does not include any frequency domain unit occupied by the first DM-RS, and / or at least part of the frequency domain exists in the frequency domain unit occupied by the first DM-RS The unit does not include any frequency-domain unit occupied by the reference signal.

With reference to the above aspects and possible designs, in a possible design, the first DCI includes a reference signal trigger request, where the reference signal trigger request is used to instruct the reference signal to be sent in the second time period, And / or, the reference signal trigger request is used to indicate a frequency domain unit occupied by sending the reference signal in the second time period, and / or, the reference signal trigger request is used to indicate that A resource pattern (Pattern) used to send the reference signal over two time periods, and / or, the reference signal trigger request is used to instruct sending the first DM-RS, the first data information, and Spatial filtering information used by the reference signal is sent on a second time period.

In combination with the above aspects and possible designs, in a possible design, the first time period and the second time period belong to the same time period, or the second time period is after the first time period.

In combination with the above aspects and possible designs, in one possible design, the timing relationship between the first time period and the second time period is fixed in the protocol, or configured through high-level signaling, or carried through the first DCI.

With reference to the above aspects and possible designs, in a possible design, the physical antenna port that sends the reference signal is the same as the physical antenna port that sends the first DM-RS, and / or, the reference signal is sent. The precoding matrix used is the same as the precoding matrix used to send the first DM-RS, and / or the spatial filtering information of the reference signal is the same as the spatial filtering information of the first DM-RS, and / Or, the number of ports of the reference signal is the same as the number of ports of the first DM-RS, and the ports of the reference signal and the ports of the first DM-RS are mapped one by one.

With reference to the above aspects and possible designs, in a possible design, the first DCI further includes first signaling, where the first signaling is used to indicate the number of frequency domain units M and 1 occupied by the first DM-RS. Frequency-domain positions, and / or the number of frequency-domain units and frequency-domain positions occupied by the reference signal.

In combination with the above aspects and possible designs, in one possible design, the number M and the frequency domain positions of the frequency domain units occupied by the first DM-RS include: M from the lowest uplink frequency in the first uplink physical resource M consecutive frequency domain units from the highest frequency in the first uplink physical resource; M discrete frequency domain units in the first uplink physical resource; the first M consecutive frequency domain units starting from the lowest frequency plus the pre-configured frequency offset Offset; the first uplink physical resources starting from the highest frequency plus the pre-configured frequency offset Offset from the M consecutive frequency domain units In the frequency domain, Offset is a positive integer.

With reference to the above aspects and possible designs, in a possible design, the frequency domain unit occupied by the reference signal is determined according to the frequency domain unit occupied by the first DM-RS; or the first DM- The frequency domain unit occupied by the RS is determined according to the frequency domain unit occupied by the reference signal.

In combination with the above aspects and possible designs, in a possible design, the first DCI further includes transmission layer number indication information, and the transmission layer number indication information is used to indicate data on the first uplink physical resource. The number of transmission layers. The number of ports of the reference signal is the same as the number of transmission layers indicated by the transmission layer number indication information.

In combination with the above aspects and possible designs, in one possible design, the reference signal is a listening reference signal SRS.

In a fifth aspect, an embodiment of the present application provides a computer-readable access medium for storing instructions. When the instructions are run on a computer, the computer is caused to execute the methods in the foregoing aspects and possible designs.

According to a sixth aspect, an embodiment of the present application provides a communication device. The device includes a processor and a memory coupled to the processor. The memory is used to store instructions. The processor is used to read and call the instructions. To implement the above aspects and possible design methods.

In a seventh aspect, an embodiment of the present application provides a computer program. When the computer program is executed, the above-mentioned aspects and possible design methods can be executed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention; FIG.

2 is a schematic structural diagram of a communication setting according to an embodiment of the present invention;

3 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

4 is a schematic flowchart of a communication method according to an embodiment of the present invention;

4a is a schematic diagram of a physical resource structure according to an embodiment of the present invention;

4b is a schematic diagram of an occupied time-frequency resource of an SRS according to an embodiment of the present invention;

FIG. 4c is a schematic diagram of time-frequency resources occupied by a DM-RS in a continuous period according to an embodiment of the present invention; FIG.

5 is a schematic flowchart of another communication method according to an embodiment of the present invention;

detailed description

The embodiments of the present application can be used in wireless communication systems, such as: Global System (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access Access Wireless (WCDMA) system, General Packet Radio Service (GPRS) system, Universal Mobile Telecommunications System (UMTS), and Long Term Evolution (LTE) system and its evolution system, New Air Interface (New Radio, NR) system.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application. As shown in FIG. 1, the communication system includes a base station 101 and at least one terminal device. Here, two terminal devices are used as an example for description. The two terminal devices are a terminal device 111 and a terminal device 112, respectively. The terminal device 111 and The terminal device 112 is within the coverage of the base station 101 and communicates with the base station 101 to implement the technical solutions provided by the embodiments of the present application described below. Exemplarily, the base station 101 is a base station of an NR system, and the terminal device 101 and the terminal device 102 are terminal devices of a corresponding NR system.

The embodiments of the present application describe various embodiments in combination with a network device and a terminal device. The network device and the terminal device can work in a licensed frequency band or an unlicensed frequency band, among which:

Terminal equipment can also be called user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user Agent or user device. Terminal equipment can be stations (STATION, ST) in Wireless Local Area Networks (WLAN), cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop (WLL) stations, Personal Digital Processing (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, For example, terminal equipment in a fifth-generation (5G) network or terminal equipment in a future evolved Public Land Mobile Network (PLMN) network, terminal equipment in an NR system, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices can also be referred to as wearable smart devices. They are the general name for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a device that is worn directly on the body or is integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also powerful functions through software support, data interaction, and cloud interaction. Broad-spectrum wearable smart devices include full-featured, large-sized, full or partial functions that do not rely on smart phones, such as smart watches or smart glasses, and only focus on certain types of application functions, and need to cooperate with other devices such as smart phones Use, such as smart bracelets, smart jewelry, etc. for physical signs monitoring.

Further, the network device may be a device for communicating with a mobile device. The network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, or an LTE Evolutional NodeB (eNB or eNodeB), or relay station or access point, or vehicle equipment, wearable device, and network equipment in future 5G networks or network equipment in future evolved PLMN networks, or in NR systems New generation base stations (new NodeB, gNodeB), etc.

In addition, in the embodiment of the present application, the network device provides a service to the cell, and the terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell. The cell may be a cell corresponding to a network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: urban cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power. , Suitable for providing high-speed data transmission services.

In addition, the carriers in the LTE system or the NR system can have multiple cells working at the same frequency at the same time. In some special scenarios, the above-mentioned carrier and cell concepts can be considered equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell ID (Cell Identify, Cell ID) of the secondary cell operating on the secondary carrier will be carried simultaneously. In this case, it can be considered that the concept of a carrier is the same as a cell. For example, a UE accessing a carrier and accessing a cell are equivalent.

High-level signaling may refer to signaling sent by a high-level protocol layer, and the high-level protocol layer is at least one protocol layer in each protocol layer above the physical layer. The high-level protocol layer may be at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (Packet Data Convergence). Protocol (PDCP) layer, Radio Resource Control (RRC) layer and Non Access Stratum (NAS) layer.

It should be understood that the term “and / or” used herein is merely an association relationship describing an associated object, which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, and A and B, there are three cases of B alone.

It should be understood that the term "not in X" as used herein includes any time on X, the starting time of X, and the ending time of X. "Not in X" may mean that there are no moments in X, or it may mean that there is no moment in one or more of the moments in X, which is not limited in this application.

The term "time domain resource" used herein generally refers to the first time domain resource, the second time domain resource, and the third time domain resource. "Frequency domain resource" generally refers to a first frequency domain resource, a second frequency domain resource, and a third frequency domain resource.

FIG. 2 shows a wireless communication device according to an embodiment of the present invention. The wireless communication device may be used as the network device 101 or an apparatus applied to the network device 101. The following uses the wireless communication device as the network device 101 as an example for description. The network device 101 can execute the method provided by the embodiment of the present invention. The network device 101 may include a processor 201 and a transceiver 202 for implementing a wireless communication function.

The processor 201 may be a modem processor. The processor 201 may include a baseband processor (BBP). The baseband processor processes the digitized received signal to extract information or data bits carried in the signal. To this end, the BBP is usually implemented in one or more digital signal processors (DSPs) within the processor 201 or by a separate integrated circuit (IC).

The transceiver 202 may be configured to support transmitting and receiving information between the network device 101 and a terminal device. In the uplink, the uplink radio frequency signal from the terminal device is received via the antenna, mediated by the transceiver 202, the baseband signal is extracted and output to the processor 201 for processing to restore the service data and / or information sent by the terminal device.令信息。 Order information. On the downlink, the baseband signal carrying the service data and / or signaling messages to be sent to the terminal device is modulated by the transceiver 202 to generate a downlink radio frequency signal and transmitted to the UE via the antenna. The transceiver 202 may include independent receiver and transmitter circuits, or may be integrated in the same circuit to implement a transceiver function.

The network device 101 may further include a memory 203, which may be used to store program code and / or data of the network device 101.

The network device 101 may further include a communication unit 204 for supporting the network device 101 to communicate with other network entities. For example, the network device 101 is configured to support communication between the network device 101 and a network device of a core network.

In the implementation shown in FIG. 2, the processor 201 may be coupled / connected to the transceiver 202, the memory 203, and the communication unit 204, respectively. As another alternative, the network device 101 may further include a bus. The transceiver 202, the memory 203, and the communication unit 204 may be connected to the processor 201 through a bus. For example, the bus may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may include an address bus, a data bus, a control bus, and the like.

FIG. 3 shows another wireless communication device provided by an embodiment of the present invention. The wireless communication device can be used as a terminal device 111-112 or a device applied to the terminal devices 111-112. The following uses the wireless communication device shown in FIG. 3 as a terminal device for description. The terminal device can execute the method provided by the embodiment of the present invention. The terminal device may be any one of the two terminal devices 111 to 112. The terminal device includes a transceiver 301, a memory 303, and a processor 304 for implementing a wireless communication function.

The transceiver 301 may be used to support the transmission and reception of information between the terminal devices 111 to 112 and the network device 101. In the downlink, the downlink radio frequency signals from the network equipment are received via the antenna, mediated by the transceiver 301, the baseband signal is extracted and output to the processor 304 for processing to restore the service data and / or information sent by the network equipment令信息。 Order information. On the uplink, the baseband signal carrying the service data and / or signaling messages to be sent to the network device is modulated by the transceiver 301 to generate an uplink radio frequency signal and transmitted to the network device via the antenna. The transceiver 301 may include independent receiver and transmitter circuits, or may be integrated in the same circuit to implement a transceiver function.

The processor 304 may be a modem processor. The processor 304 may include a baseband processor (BBP), which processes the digitized received signal to extract information or data bits carried in the signal. To this end, BBP is typically implemented in one or more digital signal processors (DSPs) within the processor 304 or by a separate integrated circuit (IC).

For example, as shown in FIG. 3, in one implementation of the processor 304, the processor 304 may include an encoder 3041, a modulator 3042, a decoder 3043, and a demodulator 3044. The encoder 3041 is configured to encode a signal to be transmitted. For example, the encoder 3041 may be used to receive service data and / or signaling messages to be sent on the uplink, and process (e.g., format, encode, or interleave, etc.) the service data and signaling messages. The modulator 3042 is configured to modulate an output signal of the encoder 3041. For example, the modulator may perform symbol mapping and / or modulation on the output signals (data and / or signaling) of the encoder, and provide output samples. The demodulator 3044 is used for demodulating the input signal. For example, the demodulator 3044 processes the input samples and provides symbol estimates. The decoder 3043 is configured to decode the demodulated input signal. For example, the decoder 3043 deinterleaves and / or decodes the demodulated input signal, and outputs the decoded signal (data and / or signaling).

The processor 304 receives digitized data that can represent voice, data, or control information, and processes the digitized data for transmission. The processor 304 may support one or more of multiple wireless communication protocols of multiple communication systems, such as a Long Term Evolution (LTE) communication system, a New Radio (NR), and a universal mobile communication system ( Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA) and so on. Optionally, the processor 304 may also include one or more memories.

The terminal device may further include an application processor 302 for generating the above-mentioned digitized data that can represent voice, data, or control information.

The processor 304 and the application processor 302 may be integrated in one processor chip.

The memory 303 is configured to store program code (sometimes also referred to as a program, an instruction, software, etc.) and / or data for supporting communication of the terminal device.

It should be noted that the memory 203 or the memory 303 may include one or more storage units. For example, the memory 203 or the memory 303 may be a storage unit inside the processor 201 or the processor 304 or the application processor 302 for storing program code, or may be The processor 201 or the processor 304 or the application processor 302 is an independent external storage unit, or may also be a storage unit including the processor 201 or the processor 304 or the application processor 302 and the processor 201 or the processor 304 or the application. The processor 302 is a component of an independent external storage unit.

The processor 201 and the processor 304 may be the same type of processor, or may be different types of processors. For example, it can be implemented in a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array (ASIC). Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, other integrated circuits, or any combination thereof. The processor 201 and the processor 304 may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of the embodiments of the present invention. The processor may also be a combination of devices that implement computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, or a system-on-a-chip (SOC).

Those skilled in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithms described in connection with the aspects disclosed in this application may be implemented as electronic hardware, stored in memory or another computer-readable medium, and implemented by Instructions executed by a processor or other processing device, or a combination of both. As an example, the devices described herein can be used in any circuit, hardware component, IC, or IC chip. The memory disclosed in this application may be any type and size of memory, and may be configured to store any type of information required. To clearly illustrate this interchangeability, various illustrative components, blocks, modules, circuits, and steps have been described generally above in their functional form. How such functionality is implemented depends on the specific application, design choices, and / or design constraints imposed on the overall system. 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 invention.

For the convenience of description, the following description is made by using a network device 101 as a network device and a terminal device 111 as an example.

For convenience of description, the frequency domain unit in this application may be a physical resource block (PRB), or a resource block group (RBG), or a subcarrier, or another frequency domain unit. The present invention No restrictions.

FIG. 4 is a schematic flowchart of an information sending method. The embodiment shown in FIG. 4 includes the following steps:

S401. The network device 101 sends configuration information of the reference signal to the terminal device 111, and the configuration information is used to indicate that the reference signal is used for demodulating data. Correspondingly, the terminal device receives the configuration information of the reference signal from the network device.

The reference signal may be a sounding reference signal (SRS), a phase tracking reference signal, or another uplink reference signal, which is not limited in the present invention. For convenience, the following uses SRS as an example for description.

S401 is optional.

Alternatively, the SRS may be fixedly configured in the protocol for demodulating data.

The operation of the network device 101 in S401 may be performed by the transceiver 202, or performed by the processor 201 through the transceiver 202. The operations of the terminal device 111 in S401 may be performed by the transceiver 301, or performed by the processor 304 through the transceiver 301.

Specifically, the configuration information may be included in high-level signaling, and the high-level signaling may be MAC layer signaling, RLC layer signaling, PDCP layer signaling, or RRC layer signaling, which is not limited in the present invention. The high-level signaling may be terminal-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal equipment, which is not limited in the present invention. The configuration information can also be fixed in the protocol. This embodiment of the present invention is described by using an example in which the high-level signaling is RRC layer signaling.

In the prior art, the SRS configuration information in RRC signaling includes SRS functions. For example, the SRS function is used for non-codebook uplink transmission, used for codebook uplink transmission, used for beam management, and used for antenna polling. Etc., the configuration parameters of the SRS resources corresponding to each function and the SRS transmission method are different.

Further, the SRS configuration information includes SRS resource configuration information. Specifically, for example, the number of ports of the SRS resource, the number of OFDM symbols occupied and the time domain position, the frequency hopping bandwidth of the SRS, the maximum frequency hopping domain bandwidth of the SRS, a cyclic shift code (CS), and a transmission comb ( Transmission Comb), sequence index value (sequence ID), transmission beam information, etc.

In the embodiment of the present invention, the function of the SRS may be configured for demodulation, which is different from the above-mentioned function. For example, after the network device 101 receives the information sent by the terminal device 111 on the PUSCH resource, the network device 101 may use the DM-RS associated with the PUSCH and the SRS for demodulation to perform channel estimation. At this time, more time-frequency domain resources can be used for channel estimation, which can effectively improve channel estimation performance, thereby ensuring PUSCH decoding performance.

S402. The network device 101 sends first downlink control information (Downlink Control Information) to the terminal device 111. Correspondingly, the terminal device 111 receives the DCI.

The operation of the network device 101 in S402 may be performed by the transceiver 202, or performed by the processor 201 through the transceiver 202. The operations of the terminal device 111 in S402 may be performed by the transceiver 301, or performed by the processor 304 through the transceiver 301.

Specifically, the first DCI includes information of a first uplink physical resource in a first time period. The length of the first time period may be the length of a scheduling time unit. For example, the length of the first time period may be the length of a subframe, the length of a slot, or a mini time slot. (Mini-Slot) length, or the length of a Transmission Time Interval (TTI), or the length including X OFDM symbols (OFDM, Symbol, OS for short), X is a positive integer, or the length of other time units The invention is not limited. The position of the first time period may be referenced to a time period in which the first DCI is detected, and an n-th time period starting from a time period in which the first DCI is detected is determined as the first time period. The present invention is not limited, and the following takes the length of the first time period as an example for description.

The information of the first uplink physical resource may include the number N of frequency domain units occupied by the first uplink physical resource, where N is an integer greater than or equal to 1. The information of the first uplink physical resource may further include a frequency domain position of a frequency domain unit of the first uplink physical resource. For example, which PRBs are in the frequency domain unit occupied by the first uplink physical resource. For example, as shown in FIG. 5, suppose a slot includes 14 OSs, which are respectively identified by OS0 to OS13. The frequency domain unit occupied by the first uplink physical resource includes 10 PRBs (that is, N = 10), and PRB10 to PRB19 Identification, which occupies 14 OSs in the time domain, which are respectively identified by OS0 to OS13.

It can be understood that the first uplink physical resource includes a PUSCH resource and / or a PUCCH resource. The invention is not limited. The following description uses PUSCH resources as an example.

Specifically, there are two types of PUSCH scheduling: centralized scheduling (PUSCH occupies continuous PRBs) and distributed scheduling (PUSCH occupies non-continuous PRBs). For DFT-s-OFDM (Discrete, Fourier, Transform-Spread, OFDM) waveforms, a centralized scheduling method is usually used to schedule cell-edge users to improve the transmit power utilization. When the centralized scheduling method is used and the DCI indicates that the bandwidth occupied by the PUSCH is greater than or equal to M PRBs, the bandwidth occupied by the DM-RS is M PRBs to ensure the performance of the DM-RS channel estimation and ensure the Demodulation performance of PUSCH. At the same time, the starting position of the M PRBs occupied by the DM-RS is the starting position of the bandwidth occupied by the PUSCH, such as FIG. 4a, which can ensure that the sending bandwidth of the SRS used to supplement the bandwidth occupied by the DM-RS is continuous. In order to improve the performance of channel estimation through SRS. When the DCI indicates that the bandwidth occupied by the PUSCH is less than the M PRBs, the bandwidth occupied by the DM-RS is the same as the bandwidth occupied by the corresponding PUSCH. The bandwidth occupied by the RS is smaller than the bandwidth occupied by the corresponding PUSCH. For distributed scheduling and DCI indicates that the bandwidth occupied by the PUSCH is greater than or equal to M PRBs, the bandwidth occupied by the DM-RS is M PRBs and the continuous PRBs in the M frequency domain are occupied to ensure the DM-RS channel The estimated performance thus ensures the demodulation performance of the PUSCH associated with the DM-RS. When the DCI indicates that the bandwidth occupied by the PUSCH is less than the M RBs, the bandwidth occupied by the DM-RS is the same as the bandwidth occupied by the corresponding PUSCH.

The number of frequency domain units M and / or the frequency domain position occupied by the first DM-RS may be a fixed value in the protocol, or may be sent by the network device 101 to the terminal device 111 through signaling, where the signaling may be In high-level signaling, the high-level signaling may be MAC layer signaling, RLC layer signaling, PDCP layer signaling, or RRC layer signaling, which is not limited in the present invention. The high-level signaling may be UE-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal devices, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell-specific signaling, or signaling shared by a group of terminal equipment. limit. M represents the maximum bandwidth configured for the terminal device 111 to send the DM-RS. For example, assuming that the frequency domain unit is PRB, M = 8, which indicates that the maximum bandwidth for the terminal device 111 to send the DM-RS is 8 PRBs. For example, the first DCI may include first signaling, where the first signaling is used to indicate the number M and / or frequency domain locations of the frequency domain units occupied by the first DM-RS, where M is an integer greater than or equal to 1. Among them, M is smaller than N.

The number M of frequency domain units may be a member of a set of a number of frequency domain units configured in advance, and the set may include one or more members. For example, the above set includes {M1 = 4, M2 = 8, M3 = 12}, and M may be one of the set {M1, M2, M3}, for example, M = M1 = 4. The above set may be a fixed set in the protocol, or may be sent by the network device 101 to the terminal device 11 through signaling. The specific signaling may be the signaling in step 402 or other signaling, which is not limited in the present invention. For example, as shown in FIG. 5, the number of frequency domain units occupied by the first DM-RS is 4 PRBs (ie, M = 4), which are respectively identified by PRB10 to PRB13, and occupy one OS in the time domain.

When the first DCI may include first signaling, the first signaling is used to indicate the number M and / or the frequency domain position of the frequency domain unit occupied by the first DM-RS, and the first signaling is used to indicate The relationship between the value of the field M of the frequency domain unit occupied by the first DM-RS and the number N of the frequency domain units occupied by the PUSCH associated with the first DM-RS. The association relationship includes the position relationship of the frequency domain unit occupied by the first DMRS and the position of the frequency domain unit occupied by the associated PUSCH, for example, the occupation starts from the frequency domain unit with the lowest index value (or the lowest frequency) occupied by the PUSCH. M frequency-domain units with increasing index values in sequence, or frequency-domain units with sequentially decreasing M index values starting from the frequency-domain unit with the highest index value (or highest frequency) occupied by the PUSCH, or occupying a certain PUSCH The M index values at the beginning of the occupied frequency domain unit are sequentially increased or decreased in the frequency domain unit, or M frequency domain resources with the same spacing between the start and end positions of the frequency domain of the PUSCH are occupied. The association relationship may further include a relationship between the number of frequency domain units occupied by the first DMRS and the number of frequency domain units occupied by the associated PUSCH, such as occupying 1/2 or 1/4 of the frequency domain units occupied by the PUSCH. , Or 1/8, or the same number of frequency domain units occupied by PUSCH. The association relationship may also include both the quantity relationship and the position relationship. Specific indication method For example, the first signaling includes 2 bits for indicating the number M of frequency domain units occupied by the first DM-RS, where "00" indicates the frequency domain units occupied by the first DM-RS The number M is the same as the number N of the frequency domain units of the associated PUSCH, "01" means M = N / 2, "10" means M = N / 4, and "11" means M = N / 8. The above-mentioned association relationship between M and N may be referred to as a DM-RS pattern. The present invention does not limit the specific number of bits and the association between the specific value and M and N. The corresponding relationship between the value of the DM-RS Pattern and / or a field indicating the number of frequency domain units M occupied by the first DM-RS and the DM-RS Pattern may be fixed in the protocol or may be The network device 101 sends the signaling to the terminal device 111 through signaling. The signaling may be high-level signaling, and the high-level signaling may be MAC layer signaling, RLC layer signaling, PDCP layer signaling, or RRC layer signaling. The invention is not limited. The high-level signaling may be terminal-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal equipment, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell specific signaling, or signaling shared by a group of terminal equipment, which is not limited in the present invention. . Further, a DM-RS pattern corresponds to a relative position relationship between a DM-RS and a frequency domain unit of a PUSCH. For example, "00" indicates that the frequency domain unit occupied by the DM-RS is the same as the frequency domain unit occupied by the PUSCH, and "01" represents M = N / 2, and occupies the N / 4 frequency domain units at the beginning and the end of the PUSCH. For N / 4 frequency domain units, it is assumed that N = 12 and M = 6, and the frequency domain units occupied by the PUSCH are PRB10-PRB21, DM-RS occupy PRB10-PRB12, and PRB19-PRB21. At this time, when the channel in the first time period is flat, the network device 101 can perform frequency domain filtering to directly demodulate data on the bandwidth occupied by the entire PUSCH. At this time, the efficiency of uplink data demodulation can be improved.

Optionally, the frequency domain position of the frequency domain resource occupied by the first DM-RS may be M consecutive frequency domain units from the lowest frequency in the first uplink physical resource. For example, as shown in FIG. 4a, it is assumed that the first uplink physical resource is 10 PRBs (ie, N = 10) with a PRB index of 10 to PRB index of 19, where the smaller the PRB index number, the more representative The lower the frequency position of the PRB (the lower the frequency point), the larger the PRB index number means that the higher the frequency position of the PRB (the higher the frequency point), the frequency domain position of the frequency domain resource occupied by the first DMR can be Four PRBs with PRB index numbers from 10 to 13 (ie, M = 4). Alternatively, the frequency domain position of the frequency domain resource occupied by the first DM-RS may be M consecutive frequency domain units from the highest frequency in the first uplink physical resource, for example, assuming the first uplink physical resource If the PRB index is 10 to PRB index (Index) 19 to 10 PRB (ie N = 10), the frequency domain position of the frequency domain resource occupied by the first DM-RS can be PRB index number 16 to PRB index Four PRBs with a number of 19 (that is, M = 4). Alternatively, the frequency domain position of the frequency domain resource occupied by the first DM-RS may be M discrete frequency domain units in the first uplink physical resource, for example, assuming that the first uplink physical resource is a PRB index (Index ) Are 10 PRBs (ie, N = 10) from 10 to PRB index (Index) 19, the frequency domain position of the frequency domain resource occupied by the first DM-RS can be PRB index number 10, PRB index number 13, PRB The index number is 15 and the PRB index number is 17 for a total of 4 PRBs (that is, M = 4). Alternatively, the frequency domain position of the frequency domain resource occupied by the first DM-RS may be M consecutive frequency domain units of the first uplink physical resource starting from the lowest frequency plus a pre-configured frequency offset Offset; the first The uplink physical resources are M consecutive frequency domain units starting from the highest frequency plus a pre-configured frequency offset Offset, where Offset is a positive integer.

Optionally, the frequency domain position of the frequency domain resource occupied by the first DM-RS may be a member of a set of frequency domain positions of a preconfigured frequency domain unit, and the set may include one or more members. For example, the set of frequency-domain positions of the pre-configured frequency-domain units includes {M1 continuous frequency-domain units starting from the lowest frequency, M1 continuous frequency-domain units starting from the highest frequency, M1 discrete frequency-domain units, and the lowest frequency M2 consecutive frequency domain units at the beginning, M2 consecutive frequency domain units at the highest frequency, M2 discrete frequency domain units, M3 consecutive frequency domain units starting at the lowest frequency, and M3 consecutive frequency units starting at the highest frequency Frequency domain unit, M3 discrete frequency domain units}. The above set of frequency domain positions may be a fixed set in the protocol, or may be sent by the network device 101 to the terminal device 11 through signaling. The specific signaling may be the signaling in step 402 or other signaling. The invention is not limited. It can be understood that the first uplink physical resource includes resources occupied by the first DM-RS. Further, N is an integer multiple of M, such as N = 2 * M or N = 3 * M. When the channel frequency selection in the first time period is severe, at this time, the channel quality (such as SINR) on different subbands of the PUSCH carried in the first time period is greatly different, and the most preferred The precoding matrix is different. However, the DM-RS / PUSCH precoding indication information corresponds to the entire PUSCH scheduling bandwidth, that is, different subbands carrying the PUSCH correspond to the same precoding matrix. The selection of the precoding matrix is such that the PUSCH is carried. The performance of all subbands is as average as possible. This brings the problem that for some subbands, the precoding matrix is not optimal, which will greatly affect the transmission performance of PUSCH on these subbands, so The DMRS may occupy only a part of the subband occupied by the PUSCH so that the precoding matrix is optimal for the part of the subband.

The first DM-RS is associated with the first uplink physical resource, that is, the first DM-RS is used for channel estimation to decode the first data information sent on the first uplink physical channel. The first DM-RS is located in a first time period.

Optionally, the first DCI may further include an SRS trigger request. The SRS trigger request is used to indicate that the SRS is sent in the second time period, and / or, the SRS trigger request is used to indicate the frequency domain unit (that is, the SRS resource) occupied by sending the SRS in the second time period, and / or, The SRS trigger request is used to indicate the resource pattern (Pattern) used to send the SRS in the second time period, and / or, the SRS trigger request is used to indicate the first DM-RS, the first data information, and the second time period. Sending the spatial filtering information used by the SRS. The SRS is associated with the first uplink physical resource, that is, it is used to perform channel estimation to decode the first data information sent on the first uplink physical resource. For the length of the second time period, reference may be made to the length of the first time period, and details are not described herein. The second time period may be the same time period as the first time period, or the second time period may be located before the first time period, or the second time period may be located after the first time period, which is not limited in the present invention, The timing relationship between the second time period and the first time period may be fixed in the protocol, or may be sent by the network device 101 to the terminal device 111 through signaling. The signaling may be high-level signaling, and the high-level signaling may be It is MAC layer signaling, RLC layer signaling, PDCP layer signaling, or RRC layer signaling, which is not limited in the present invention. The high-level signaling may be terminal-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal equipment, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell specific signaling, or signaling shared by a group of terminal equipment, which is not limited in the present invention. . For example, the timing relationship may be a time offset, and the network device 101 may notify the terminal device by carrying the time offset information in the first DCI. For example, as shown in FIG. 4a, the SRS and the first DM-RS are in the same slot, that is, the second time period is the same time period as the first time period. At least a part of the frequency domain unit of the SRS resource overlaps with at least a part of the frequency domain unit of the first uplink physical resource. For example, the first uplink physical resource may include all frequency domain units occupied by the SRS, or the first uplink physical resource may include some frequency domain units occupied by the SRS, which is not limited in the present invention. For example, as shown in FIG. 4a, the frequency domain units PRB10 to PRB19 occupied by the first uplink physical resource, and the frequency domain units occupied by the SRS are PRB16 to PRB19. For another example, the frequency domain units PRB10 to PRB19 occupied by the first uplink physical resource, and the frequency domain units occupied by the SRS are PRB16 to PRB23. Further, at least a part of the frequency domain unit occupied by the SRS is different from at least a part of the frequency domain unit occupied by the resources of the first DM-RS. For example, as shown in FIG. 4a, the frequency domain units occupied by the first uplink physical resource are PRB10 to PRB19, the frequency domain units occupied by the first DM-RS are PRB10 to PRB13, and the frequency domain units occupied by the SRS are PRB16 to PRB19. For another example, the frequency domain units PRB10 to PRB19 occupied by the first uplink physical resource, the frequency domain units occupied by the first DM-RS are PRB10 to PRB13, and the frequency domain units occupied by the SRS are PRB12 to PRB15. For another example, the frequency domain units PRB10 to PRB19 occupied by the first uplink physical resource, the frequency domain units occupied by the first DM-RS are PRB10 to PRB13, and the frequency domain units occupied by the SRS are PRB10 to PRB15. Optionally, the frequency domain unit of the SRS resource includes a part of the frequency domain unit of the first uplink physical resource that is not occupied by the first DM-RS. Optionally, the frequency domain unit occupied by the SRS includes at least a part of the frequency domain units of the first uplink physical resource that are not occupied by the first DM-RS. By complementing the frequency domain unit occupied by the DM-RS and the frequency domain unit occupied by the SRS in the frequency domain, channel information of more frequency domain units in the frequency domain unit of the first uplink physical resource can be obtained, which is helpful for solution Tune the first data information transmitted on the first uplink physical resource.

Optionally, the frequency domain unit occupied by the first DM-RS and the frequency domain unit occupied by the SRS do not completely overlap, that is, at least part of the frequency domain units in the frequency domain unit occupied by the SRS do not include the first DM-RS Any frequency domain unit occupied, for example, the frequency domain unit occupied by the first SRS is PRB10 to PRB15, and the frequency domain unit occupied by the first DM-RS is PRB13 to PRB16, then PRB10 to PRB12 do not include the first DM-RS Any frequency-domain unit occupied. For another example, the frequency domain units occupied by the first SRS are PRB10 to PRB15, and the frequency domain units occupied by the first DM-RS are PRB13 to PRB15, so PRB10 to PRB12 do not include any frequency domain occupied by the first DM-RS unit. And / or, at least some of the frequency domain units occupied by the first DM-RS do not include any frequency domain units occupied by the SRS. In the embodiments of the present application, the frequency domain unit occupied by the SRS has the same meaning as the frequency domain unit of the SRS resource.

The resource pattern used by the SRS resource may be predefined, for example, the SRS only occupies the complement of the frequency domain unit occupied by the first DM-RS and the frequency domain unit occupied by the PUSCH. It can also be configured through high-level signaling. For example, high-level signaling can configure the number and position of frequency domain units occupied by SRS and the corresponding frequency hopping bandwidth. The frequency hopping bandwidth is the frequency domain occupied by SRS in each OFDM symbol. The number of units, or the relative value of the number and position of frequency domain units occupied by SRS and the number and position of frequency domain units occupied by PUSCH, for example, the number of frequency domain units occupied by SRS is the frequency domain occupied by PUSCH The start position of the frequency domain unit occupied by the SRS is 1/2, 1/4, etc. of the number of units, and the start position or the end position of the frequency domain unit occupied by the PUSCH. It is also possible to configure the absolute value of the number of frequency domain units occupied by multiple SRSs and the position or the relative value with respect to PUSCH through high-level signaling, which is the resource pattern of multiple SRSs. Selecting one of the SRS resource patterns to determine the SRS resource pattern.

If the first DCI includes an SRS trigger request and the SRS trigger request triggers an SRS resource for data demodulation, the number of frequency domain units (or transmission bandwidth) occupied by the first DM-RS is less than that of the first uplink physical resource. The number of frequency domain units. The number of frequency domain units (or transmission bandwidth) occupied by the SRS may be determined according to the first uplink physical resource or further based on the frequency domain units occupied by the first DM-RS. If the first DCI does not include an SRS trigger request and the SRS trigger request triggers SRS resources for data demodulation, the number of frequency domain units occupied by the first DM-RS and the number of frequency domain units of the first uplink physical resource the same. The number of frequency domain units occupied by the further SRS is determined based on the number of frequency domain units of the first uplink physical resource and the number of frequency domain units occupied by the first DM-RS associated therewith.

Optionally, whether the first DCI includes an SRS trigger request that triggers SRS resources used for data demodulation is determined by the number N of frequency domain units of the first uplink physical resource. For example, if N is less than the pre-configured value, the SRS trigger request that triggers the SRS resource for data demodulation is not included. If N is greater than or equal to the pre-configured value, the SRS trigger request that triggers the SRS resource for data demodulation is not included. SRS triggers the request. The pre-configured value may be a fixed value in the protocol, or may be sent by the network device 101 to the terminal device 111 through signaling. The signaling may be high-level signaling, and the high-level signaling may be MAC layer signaling. , RLC layer signaling, PDCP layer signaling, or RRC layer signaling, the present invention is not limited. The high-level signaling may be terminal-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal equipment, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell specific signaling, or signaling shared by a group of terminal equipment, which is not limited in the present invention. .

Optionally, the number and / or frequency domain position of the frequency domain units occupied by the SRS, the number of OFDM symbols occupied and / or the position of the OFDM symbols, and the SRS frequency hopping bandwidth can be configured through high-level signaling such as RRC signaling . Further, the start position of the frequency domain unit occupied by the SRS is the start position of the PUSCH frequency domain unit that does not include the DM-RS associated with the PUSCH, so that the network device performs the frequency domain of the unbearable DM-RS based on the SRS Channel estimation on the unit. Optionally, the number of frequency domain units (or transmission bandwidth) occupied by the SRS may also be determined according to the resource pattern of the SRS configured by the base station through high-level signaling, as described above, or according to the SRS indicated by the base station through the first DCI The resource pattern is OK.

Optionally, the first signaling is used to indicate the number P of frequency domain units occupied by the SRS, where P is an integer greater than or equal to 1. For example, as shown in FIG. 4a, the frequency domain units occupied by the SRS are PRB16 to PRB19, that is, P = 4.

Further, the first DCI may further include transmission layer number indication information, where the transmission layer number indication information is used to indicate the number of data transmission layers on the first uplink physical resource, and the number of SRS ports and the transmission layer The number of transmission layers indicated by the number indication information is the same. Further, each port of the SRS corresponds to each transport layer, that is, the precoding matrix corresponding to each SRS port is the same as the precoding matrix corresponding to each transport layer. The transmission layer number indication information is also used to indicate the port number of the first DM-RS. Further, the first DCI further includes DM-RS port indication information, and the DM-RS port indication information is used to indicate the first Port number of the DM-RS. The port of each SRS corresponds to the port of each first DM-RS, that is, the number of ports of the SRS is the same as the number of ports of the first DM-RS, and each SRS port corresponds The precoding matrix is the same as the precoding matrix corresponding to each DM-RS port.

Optionally, the first signaling is used to indicate a frequency domain position of a frequency domain unit occupied by the SRS. The specific manner is similar to indicating the frequency domain position of the frequency domain unit occupied by the first DM-RS, which is not limited herein.

Alternatively, the number of frequency domain units P occupied by the SRS and / or the frequency domain positions of the frequency domain units occupied by the SRS may be carried in step S401.

Optionally, the network device or the terminal device may determine the frequency domain unit occupied by the first DM-RS according to the frequency domain unit of the SRS resource; or may determine the frequency of the SRS resource according to the frequency domain unit occupied by the first DM-RS. Domain unit.

Optionally, the SRS may occupy one time domain unit in the second time period, or occupy multiple time domain units in the second time period. The invention is not limited. For example, as shown in FIG. 4b, assuming that the second time period is a slot, the slot contains 14 OSs, and a time domain unit is equivalent to an OS. . When the SRS occupies multiple time domain units, the frequency domain units occupied by the SRS on different time domain units may be different. The specific occupation of several OSs and / or which OSs may be fixed in the protocol or notified to the terminal device through signaling. For specific signaling notification, reference may be made to the configuration of other parameters in the embodiments of the present invention, and details are not described again.

Optionally, the precoding used by the first DM-RS and the precoding used by the SRS may be different, and the uplink data transmitted on the first uplink physical resource may use both the precoding of the first DM-RS and the precoding of the SRS. coding. Specifically, the same uplink data on the first uplink physical resource as the frequency domain unit occupied by the first DM-RS uses the same precoding as the first DM-RS, and the first uplink physical resource is The uplink data of the same frequency domain unit occupied by the SRS uses the same precoding as the SRS; or, assuming that there are N OSes in the first time period, the uplink data transmitted on the first N / 2 OSes is the same as the first DM-RS The same precoding, the uplink data transmitted on the last N / 2 OSes uses the same precoding as the SRS. In this way, the spatial diversity gain can be improved.

S403. The terminal device 111 sends the first data information and the first DM-RS to the network device 101 on the first uplink physical resource in the first time period.

Further, the terminal device 111 sends the SRS in the second time period. Specifically, the terminal device 111 sends the SRS on the frequency domain unit and the time domain unit occupied by the SRS in the second time period.

The operation of the network device 101 in S403 may be performed by the transceiver 202, or performed by the processor 201 through the transceiver 202. The operations of the terminal device 111 in S403 may be performed by the transceiver 301, or performed by the processor 304 through the transceiver 301.

Specifically, the terminal device 111 sends the first DM-RS using the time domain unit in the first time period occupied by the first DM-RS, and the terminal device 111 uses the time when the first uplink physical resource is not occupied by the first DM-RS. The first data message is sent on the domain unit. For example, as shown in FIG. 4a, assuming that the first time period is the same as the second time period, the frequency domain units PRB10 to PRB19 occupied by the first uplink physical resource are the time domain units occupied by the first time period (time slot). OS0 to OS3, the frequency domain units occupied by the first DM-RS are PRB10 to PRB13, the time domain units occupied are OS0 in the first time period (time slot), and the frequency domain units occupied by the SRS are PRB16 to PRB19. The domain unit is OS13 in the first time period (time slot), then the terminal device 111 uses the frequency domain units PRB10 to PRB19 in the first time period, and the time domain units OS1 to OS12 send the first data information. For another example, assuming that the first time period is different from the second time period, the frequency domain units PRB10 to PRB19 occupied by the first uplink physical resource are the OS0 to OS3 of the first time period (time slot). The frequency domain units occupied by a DM-RS are PRB10 to PRB13, the time domain units occupied are OS0 in the first time period (time slot), the frequency domain units occupied by SRS are PRB16 to PRB19, and the time domain units occupied are second In the time zone (time slot) of OS13, the terminal device 111 uses the frequency domain units PRB10 to PRB19 in the first time zone, and the time domain units OS1 to OS13 send the first data information. The first data information may be user data, or buffer status information, or high-level signaling information, such as RRC layer signaling. The present invention does not limit the content and type of the first data information.

Optionally, before step 403, the terminal device 111 or the network device 101 determines whether the number N of the frequency domain units of the first uplink physical resource is greater than or equal to a pre-configured value. If N is greater than or equal to the pre-configured value, the terminal device 111 or the network device 101 determines that M <N. The pre-configured value may be a fixed value in the protocol, or may be sent by the network device 101 to the terminal device 111 through signaling. The signaling may be high-level signaling, and the high-level signaling may be MAC layer signaling. , RLC layer signaling, PDCP layer signaling, or RRC layer signaling, the present invention is not limited. The high-level signaling may be UE-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal devices, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell specific signaling, or signaling shared by a group of terminal equipment, which is not limited in the present invention. . The operations of the network device 101 may be performed by the processor 201. The operations of the terminal device 111 in S402 may be performed by the processor 304.

Optionally, the physical antenna port that sends the SRS is the same as the physical antenna port that sends the first DM-RS, and / or the precoding matrix used to send the SRS is the same as the precoding matrix used to send the first DM-RS, And / or, the spatial filtering information of the SRS is the same as the spatial filtering information of the first DM-RS, and / or, the number of ports of the SRS is the same as that of the first DM-RS, and the ports of the SRS are the same as the first DM -RS ports are mapped one by one. The first DCI includes indication information of the number of transmission layers. Each port of the SRS corresponds to each transmission layer. That is, the precoding matrix corresponding to each SRS port is the same as the precoding matrix corresponding to each transmission layer. It means that the physical antenna port of the same terminal device is used to send each SRS port and the data of each transport layer, and the phase weights (co-phasing) between the physical antenna ports are the same. The transmission layer number indication information is also used to indicate the port number of the first DM-RS. Further, the first DCI further includes DM-RS port indication information, and the DM-RS port indication information is used to indicate the first Port number of the DM-RS. The port of each SRS corresponds to the port of each first DM-RS, that is, the number of ports of the SRS is the same as the number of ports of the first DM-RS, and each SRS port corresponds The precoding matrix is the same as the precoding matrix corresponding to each DM-RS port. Further, the transmission beam (spatial filtering information) used to send the first DM-RS and corresponding uplink data may also be notified through the first DCI, and the transmission beam (spatial filtering information) used to send the SRS may also be used. The transmission beam notified by the first DCI.

S404. The network device 101 sends a second DCI to the terminal device 111. Correspondingly, the terminal device 111 receives the second DCI.

Step S404 is optional.

The operation of the network device 101 in S404 may be performed by the transceiver 202, or performed by the processor 201 through the transceiver 202. The operation of the terminal device 111 in S404 may be performed by the transceiver 301, or performed by the processor 304 through the transceiver 301.

Specifically, the second DCI includes information of the second uplink physical resource in the third time period. The meaning of the third time period is similar to that of the first time period, and details are not described herein. The meaning of the information of the second uplink physical resource is similar to that of the information of the first uplink physical resource, and details are not described herein. The third time period is after the first time period, for example, the third time period is a time period adjacent to the first time period after the first time period. For another example, the third time period is after the first time period and is separated from the first time period by Y time periods. Y is a positive integer, that is, if the first time period is recorded as the time period n, the third time period can be recorded as the time. Segment n + Y. Assuming Y = 1, the third time period is separated from the first time period by one time period, that is, if the first time period is recorded as the time period n, the third time period may be recorded as the time period n + 2.

Further, at least a part of the frequency domain unit of the second uplink physical resource overlaps with at least a part of the frequency domain unit of the first uplink physical resource. For example, as shown in FIG. 4c, it is assumed that the first time period is time period n, the third time period is time period n + 3, and the PRB (PRB10 to PRB19) indicated by the filled box in the first time period is the first In the frequency domain unit of the uplink physical resource, the PRB (PRB11 to PRB17) indicated by the filled box in the third time period is the frequency domain unit of the second uplink physical resource, and the filled box in the time period n + 1 indicates PRB is the frequency domain unit of the uplink physical resource on time period n + 1, and the PRB indicated by the filled box in time period n + 2 is the frequency domain unit of the uplink physical resource on time period n + 2. For another example, the frequency domain unit of the first uplink physical resource includes a frequency domain unit of the second uplink physical resource.

Optionally, the second DCI may further include the number of frequency domain units M 'occupied by the second DM-RS, where M' is an integer greater than or equal to 1. Among them, M 'is smaller than N, and M' is smaller than M. The meaning and configuration of M 'are similar to those of M and will not be repeated here. Because the second uplink physical resource and the first uplink physical resource partially overlap in the frequency domain, that is, there is a certain channel correlation, when the second uplink physical resource is used for uplink data transmission, the transmission on the second uplink physical resource can be reduced. The frequency domain density of the DM-RS corresponding to the uplink data can further increase the transmission power of the DM-RS corresponding to the uplink data transmitted on the second uplink physical resource, ensure the transmission performance of the DM-RS, and better perform the channel. It is estimated that the decoding performance of uplink data information is finally guaranteed.

Further, the second DCI may further include a frequency domain position of a frequency domain resource occupied by the second DM-RS. The frequency domain position of the frequency domain resource occupied by the second DM-RS is similar to the meaning and configuration of the frequency domain position of the frequency domain resource occupied by the first DM-RS, and details are not described herein.

The second uplink physical resource includes a PUSCH resource and / or a PUCCH resource. The invention is not limited.

For the content carried by the second DCI, reference may be made to the content carried by the first DCI, and details are not described herein.

The second DCI and the first DCI may be the same DCI or different DCIs, which is not limited in the present invention.

S405. The terminal device 111 sends the second data information and the second DM-RS to the network device 101 on the second uplink physical resource in the third time period. Correspondingly, the network device 101 receives the second data information and the second DM-RS on the second uplink physical resource in the third time period.

Step S405 is optional.

The operation of the network device 101 in S405 may be performed by the transceiver 202, or performed by the processor 201 through the transceiver 202. The operation of the terminal device 111 in S402 may be performed by the transceiver 301, or performed by the processor 304 through the transceiver 301.

The meaning of the second data information is similar to that of the first data information, and details are not described herein.

Specifically, the number of frequency domain units M 'occupied by the second DM-RS is less than M.

Optionally, when the interval between the third time period and the first time period is less than or equal to a pre-configured value, the terminal device 111 determines that M 'is less than M. For example, the pre-configured value is 3, that is, when the interval between the first time period and the third time period is less than or equal to 3, the terminal device 111 determines that M 'is less than M. The pre-configured value may be a fixed value in the protocol, or may be sent by the network device 101 to the terminal device 111 through signaling. The signaling may be high-level signaling, and the high-level signaling may be MAC layer signaling. Order, RLC layer signaling, PDCP layer signaling, or RRC layer signaling, the present invention is not limited. The high-level signaling may be terminal-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal equipment, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell specific signaling, or signaling shared by a group of terminal equipment, which is not limited in the present invention. . Further, the transmission parameters of the first uplink physical resource are the same as the transmission parameters of the second uplink physical resource. At this time, because the second uplink physical resource and the first uplink physical resource have a certain channel correlation, when the second uplink physical resource is used for uplink data transmission, the DM corresponding to the uplink data transmitted on the second uplink physical resource can be reduced. -RS frequency domain density, which can further increase the transmission power of the DM-RS corresponding to the uplink data transmitted on the second uplink physical resource, ensure the performance of the DM-RS, thereby better performing channel estimation, and finally guaranteeing uplink data information Decoding performance.

Optionally, when at least one time period between the first time period and the third time period, or all time periods, or K consecutive time periods, or cumulative K time periods, the terminal device 111 is allocated uplink For physical resources (such as PUSCH), the terminal device 111 determines that M ′ is less than M, where K is an integer greater than or equal to 0. For example, as shown in FIG. 4c, the terminal device 111 has uplink physical resources in each time period from the first time period (time period n) to the third time period (time period n + 3). Further, at least a part of the frequency domain unit of the second uplink physical resource overlaps with at least a part of the frequency domain unit of the first uplink physical resource, and at least a part of the frequency domain unit of the second uplink physical resource is from the first time period to the third At least a part of the frequency domain unit of the uplink physical resource over at least one time period between the time periods overlaps. Further, the frequency domain unit of the first uplink physical resource in the first time period includes the frequency domain unit of the second uplink physical resource in the third time period, and at least one time between the first time period and the third time period The frequency domain unit of the uplink physical resource on the segment includes a frequency domain unit of the second uplink physical resource on the third time period. Further, the frequency domain unit of the first uplink physical resource, the frequency domain unit of the second uplink physical resource, and the frequency domain unit of the uplink physical resource in at least one time period between the first time period and the third time period are the same. Further, the interval between the first time period and the third time period is greater than a pre-configured value, or the number of at least one time period between the first time period and the third time period is greater than a pre-configured value and the first The interval between the time period and the third time period is less than or equal to a pre-configured value. The one or more pre-configured values may be fixed values in the protocol, or may be sent by the network device 101 to the terminal device 111 through signaling. The signaling may be high-level signaling, and the high-level signaling may be It is MAC layer signaling, RLC layer signaling, PDCP layer signaling, or RRC layer signaling, which is not limited in the present invention. The high-level signaling may be terminal-specific high-level signaling, may be cell-specific high-level signaling, or may be high-level signaling shared by a group of terminal equipment, which is not limited in the present invention. Or the signaling can be physical layer control signaling. The physical layer control signaling can be terminal equipment specific signaling, cell specific signaling, or signaling shared by a group of terminal equipment, which is not limited in the present invention. . Further, the transmission parameter of the first uplink physical resource is the same as the transmission parameter of the uplink physical resource in at least one period between the first time period and the third time period, and the transmission parameter of the first uplink physical resource is the same as the second The transmission parameters of the uplink physical resources are the same. Specifically, the transmission parameters include information on the number of transmission layers, that is, the channel matrix dimensions of data transmission on the first uplink physical resource and the second uplink physical resource are the same, so that the first DM-RS transmitted on the first uplink physical resource is used. The uplink data transmitted on the second uplink physical resource may be estimated. The transmission parameters may also include the size and location of the frequency domain resources occupied by data transmission. When the first uplink physical resources and the second uplink physical resources occupy the same frequency domain resources, the first uplink physical resources may be used for transmission. The first DM-RS can estimate uplink data transmitted on the second uplink physical resource, thereby further reducing the frequency domain unit occupied by the DM-RS transmitted on the second uplink physical resource. Because the second uplink physical resource and the first uplink physical resource and the uplink physical resource in at least one time period between the first time period and the third time period have a certain channel correlation in time, the terminal device 111 can continuously The uplink transmission is performed in a time period, thereby reducing the density of the DM-RS when using subsequent uplink physical resources for uplink transmission, which can further increase the transmission power of the DM-RS, ensure the performance of the DM-RS, and simultaneously, it can combine multiple The DM-RS in the time period performs channel estimation, thereby better performing channel estimation, and finally ensuring decoding performance of uplink data information. For example, as shown in FIG. 4c, the DM-RSs in the time period n + 1 to n + 2 occupy a total of 7 PRBs, and the DM-RSs in the time period n + 3 occupy a total of 3 PRBs. The network device 101 may use the DM-RS on n + 3 and the DM-RS on n + 1˜n + 2 to perform joint channel estimation, thereby receiving data information on n + 3.

Optionally, the terminal device sends DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period, and the at least one time period, the first The time interval between any two time periods in the time period and the time period included in the third time period is less than K, and K is an integer greater than or equal to 0.

Further, the terminal device 111 sends DM-RS and data information on uplink physical resources in at least one of the first time period and the third time period. For example, as shown in FIG. 4c, if the terminal device 111 has uplink physical resources in each time period from the first time period (time period n) to the third time period (time period n + 3), the terminal device 111 may The uplink transmission is performed in consecutive time periods.

Through the method of the present invention and the embodiments, the time correlation and frequency correlation of uplink physical resources in multiple time periods are used to reduce the density of DM-RS, so that DM-RS can be transmitted at higher power and DM is guaranteed. -RS performance, so as to better perform channel estimation, and finally guarantee decoding performance of uplink data information.

FIG. 5 is a schematic flowchart of a method provided by Embodiment 2 of the present invention. Implementation 2 includes the following steps:

S501 is similar to S401, and details are not described herein.

S502. The network device 101 sends downlink control information (Downlink Control Information) to the terminal device 111. Accordingly, the terminal device 111 receives the DCI.

The DCI includes information about the first uplink physical resource in the first time period. For a specific manner, refer to the description in step S402.

The DCI may further include an SRS trigger request. For a specific manner, refer to the description in step S402.

When the first uplink physical resource includes PUSCH and the transmission mode of the PUSCH is a non-codebook-based transmission mode, the SRS resource selection indicator (SRS resource indicator) in the DCI may indicate the precoding of the PUSCH and the corresponding DM-RS. The scheme and the number of transmission layers. The SRI field can be further used to trigger SRS resources corresponding to the SRI. Specifically, the SRI indicates the SRS resource number, the terminal device 111 may determine the configuration information of the SRS resource corresponding to the SRS resource number indicated by the SRI, and the precoding used by the SRS sent on the SRS resource is earlier than the SRI and closest to the SRI time The SRS used on the SRS resource corresponding to the SRS resource number indicated by the SRI uses the same precoding. The SRS resource is associated with a first uplink physical resource.

When the first uplink physical resource includes PUSCH and the transmission mode of the PUSCH is a codebook-based transmission mode, SRS resource selection indicator (SRI) + rank indicator (TRI) + precoding indicator in DCI (Transmission Precoding Matrix Indicator, TPMI) field (Bit Field) is used to indicate a precoding scheme for transmitting the first DM-RS associated with the PUSCH. The SRI + TRI + TPMI field can also indicate the precoding scheme of the SRS associated with the PUSCH. The SRS associated with the PUSCH refers to the channel estimation that the SRS uses for the PUSCH demodulation, that is, the first DM-RS and the The precoding scheme of the PUSCH associated with the first DM-RS is the same as the precoding scheme of the SRS. The precoding scheme refers to the physical antenna port, the number of antenna ports, and the phase weighting between the antenna ports used for signal or data transmission. Or, a new field is added in the DCI to indicate the precoding scheme and the transmission port of the SRS associated with the PUSCH.

When the first uplink physical resource includes a PUSCH and the transmission mode of the PUSCH is a non-codebook-based transmission mode, the SRI field in the DCI is used to indicate the SRS resources for channel measurement for non-codebook transmission from L single ports. One or more SRS resources are selected, and the number of antenna ports for transmitting the PUSCH and the DM-RS associated with the PUSCH is the same as the number of antenna ports of the SRS indicated by the SRI field and the precoding scheme of each port, and L is a positive integer. SRI field may also indicate that the associated simultaneously with the PUSCH SRS precoding scheme, associated with the PUSCH channel of the SRS SRS means for estimating the PUSCH demodulation, i.e., a first and a second DM-RS DM- The precoding scheme of the PUSCH associated with the RS is the same as the precoding scheme of the SRS.

When the first uplink physical resource includes the PUSCH and the transmission mode of the PUSCH is codebook-based transmission, when the DCI does not include a field for indicating the precoding scheme of the PUSCH and the DM-RS associated with the PUSCH, for example, the DCI is in the DCI format 0_0 (Format 0_0), that is, a compact DCI format. The terminal device 111 can autonomously determine the PUSCH and the antenna port and the precoding matrix of the DM-RS associated with the PUSCH. At the same time, since the DCI does not include the number of transmission layers indicating the PUSCH and the DM-RS associated with the PUSCH, all PUSCHs scheduled through the DCI format 0_0 adopt single stream transmission. Both the compact DCI format and the ordinary DCI format are used for uplink data scheduling. The compact DCI format carries fewer bits and fields than the ordinary DCI format.

The DCI in S502 may be the same DCI as the first DCI in S402, or may be a different DCI. The invention is not limited.

S503. The terminal device 111 sends the first data information and the first DM-RS to the network device 101 on the first uplink physical resource in the first time period.

Further, the terminal device 111 sends the SRS in the second time period. Specifically, the terminal device 111 sends the SRS on the frequency domain unit and the time domain unit in the second time period occupied by the SRS.

The operations of the network device 101 in S503 may be performed by the processor 201 through the transceiver 202. The operations of the terminal device 111 in S503 may be performed by the processor 304 through the transceiver 301.

Step S503 is similar to S403, and is not repeated here.

In the embodiment of the present invention, by indicating that the precoding scheme of the SRS is the same as the precoding scheme of the associated PUSCH and DM-RS, the SRS receiving performance can be improved, and at the same time, the channel estimation of the SRS used to receive the associated PUSCH can be improved Reception performance of PUSCH.

The example of the present invention also provides a processor-readable storage medium including instructions, and the instructions are implemented when the instructions run on the processor. When the processor executes the method of the embodiment of the present invention, the sending action may be that the input and output ports of the processor output a baseband signal that carries information to be sent, and the receiving action may be that the input and output ports of the processor receive the baseband that carries information to be received signal. It can be understood that the processor-readable storage medium provided by the embodiment of the present invention may also be a computer-readable storage medium.

An example of the present invention further provides an apparatus (for example, an integrated circuit, a wireless device, a circuit module, etc.) for implementing the above method. The device includes a processor and a memory connected to the processor, the memory is used to store instructions, and the processor is used to read and execute the instructions stored in the memory, so that the device executes the foregoing Methods. Implementing the devices described herein may be a stand-alone device or may be part of a larger device. The device may be (i) a stand-alone IC; (ii) a collection with one or more ICs, which may include a memory IC for storing data and / or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter / Receiver; (iv) ASIC, such as a mobile station modem; (v) modules that can be embedded in other devices; (vi) receiver, cell phone, wireless device, handset, or mobile unit; (vii) others Wait.

The method and apparatus provided in the embodiments of the present invention may be applied to a terminal device or an access network device (or a network device) (which may be collectively referred to as a wireless device). The terminal device or access network device or wireless 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. This hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. This application layer contains applications such as browsers, address books, word processing software, and instant messaging software. Moreover, in the embodiment of the present invention, the embodiment of the present invention does not limit the specific structure of the method execution subject, as long as the program that records the code of the method of the embodiment of the present invention can be used to transmit a signal according to the embodiment of the present invention. The communication method is sufficient. For example, the wireless communication method according to the embodiment of the present invention may be executed by a terminal device or an access network device, or a function that can call a program and execute the program in the terminal device or the access network device. Module.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present invention.

In addition, various aspects or features of embodiments of the present invention may be implemented as a method, an apparatus, or an article of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media used to store information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instruction (s) and / or data.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present invention are wholly or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.

It should be understood that, in various embodiments of the embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and it should not deal with the present invention. The implementation process of the examples constitutes any limitation.

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

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention is essentially a part that contributes to the existing technology or a part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium. Including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or an access network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

The above are only specific implementations of the embodiments of the present invention, but the scope of protection of the embodiments of the present invention is not limited to this. Any person familiar with the technical field can easily implement the technical scope disclosed by the embodiments of the present invention. Any change or replacement is considered to be covered by the protection scope of the embodiments of the present invention.

Claims

A method for sending information includes:

Receiving first downlink control information DCI, where the first DCI includes information of a first uplink physical resource in a first time period;

Sending a first demodulation reference signal DM-RS and first data information on the first uplink physical resource, sending a reference signal on the reference signal resource of the second time period, and occupied by the first DM-RS The number M of frequency domain units is less than the number N of frequency domain units of the first uplink physical resource, at least a portion of the frequency domain unit of the reference signal resource and at least a portion of the frequency domain unit of the first uplink physical resource Overlap, M, N are integers greater than or equal to 1.
The method according to claim 1, wherein the frequency domain unit of the reference signal resource comprises a frequency domain unit of the frequency domain unit of the first uplink physical resource that is not occupied by the first DM-RS. At least a part of.
The method according to claim 1 or 2, wherein the first DCI further comprises a reference signal trigger request, wherein the reference signal trigger request is used to instruct to send the reference signal in the second time period And / or, the reference signal trigger request is used to indicate a frequency domain unit occupied by sending the reference signal in the second time period, and / or, the reference signal trigger request is used to indicate that A resource pattern (Pattern) used for sending the reference signal in the second time period, and / or, the reference signal trigger request is used to instruct sending the first DM-RS, the first data information, and The spatial filtering information used for sending the reference signal on the second time period.
The method according to any one of claims 1-3, before receiving the DCI, further comprising:

Receiving configuration information of the reference signal, where the configuration information is used to indicate that the reference signal is used for demodulating data.
The method according to any one of claims 1-4, further comprising:

Determining whether the number N of frequency domain units of the first uplink physical resource is greater than a pre-configured value;

If the number N of frequency domain units of the first uplink physical resource is greater than the pre-configured value, determining that the number M of frequency domain units occupied by the first DM-RS is less than the frequency of the first uplink physical resource The number of domain units N.
The method according to any one of claims 1-5, wherein the first time period and the second time period belong to the same time period, or the second time period is at the first time After the paragraph.
The method according to any one of claims 1-6, wherein a physical antenna port transmitting the reference signal is the same as a physical antenna port transmitting the first DM-RS, and / or, transmitting the reference The precoding matrix used for the signal is the same as the precoding matrix used for sending the first DM-RS, and / or the spatial filtering information of the reference signal is the same as the spatial filtering information of the first DM-RS, And / or, the number of ports of the reference signal is the same as the number of ports of the first DM-RS, and the ports of the reference signal and the ports of the first DM-RS are mapped one by one.
The method according to any one of claims 1-7, comprising:

Receiving a second DCI, where the second DCI includes information of a second uplink physical resource in a third time period, where the third time period is after the first time period, a frequency domain unit of the second uplink physical resource At least a portion of the overlapping with at least a portion of a frequency domain unit of the first uplink physical resource;

Sending second DM-RS and second data information on the second uplink physical resource, and the number of frequency domain units occupied by the second DM-RS is less than the frequency domain units occupied by the first DM-RS The number M.
The method according to claim 8, comprising:

Sending DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period.
The method according to any one of claims 1-9, comprising:

The first DCI further includes first signaling, where the first signaling is used to indicate the number of frequency domain units M and frequency domain locations occupied by the first DM-RS, and / or, the reference The number of frequency domain units and frequency domain locations occupied by the signal.
The method according to claim 10, wherein the number M and the frequency domain position of the frequency domain units occupied by the first DM-RS include:

M consecutive frequency domain units starting from the lowest frequency in the first uplink physical resource; or

M consecutive frequency domain units starting from the highest frequency in the first uplink physical resource; or

M discrete frequency domain units in the first uplink physical resource.
The method according to claim 10 or 11, wherein a frequency domain unit occupied by the reference signal is determined according to a frequency domain unit occupied by the first DM-RS; or

The frequency domain unit occupied by the first DM-RS is determined according to the frequency domain unit occupied by the reference signal.
The method according to any one of claims 1-12, comprising:

The first DCI further includes transmission layer number indication information, and the transmission layer number indication information is used to indicate the number of data transmission layers on the first uplink physical resource, and the number of ports of the reference signal and the transmission layer The number of transmission layers indicated by the number indication information is the same.
A method for receiving information, comprising:

Sending first downlink control information DCI, where the first DCI includes information of a first uplink physical resource in a first time period;

Receiving a first demodulation reference signal DM-RS and first data information sent by a terminal device on the first uplink physical resource, and receiving a reference signal on the reference signal resource in the second time period, the first DM -The number of frequency domain units M occupied by the RS is less than the number of frequency domain units N of the first uplink physical resource, at least a part of the frequency domain units of the reference signal resource and the frequency domain of the first uplink physical resource At least a part of the cells overlap, and M and N are integers greater than or equal to 1.
The method according to claim 14, wherein the frequency domain unit of the reference signal resource includes a frequency domain of the frequency domain unit of the first uplink physical resource that is not occupied by the first DM-RS At least a part of the unit.
The method according to claim 14 or 15, wherein the first DCI further comprises a reference signal trigger request, wherein the reference signal trigger request is used to instruct the terminal device to send in the second time period The reference signal, and / or, the reference signal trigger request is used to instruct the terminal device to send a frequency domain unit occupied by the reference signal in the second time period, and / or, the reference signal The trigger request is used to instruct the terminal device to send a resource pattern (Pattern) used by the reference signal in the second time period, and / or the reference signal trigger request is used to instruct the first DM to be sent. -RS, the first data information, and spatial filtering information used to send the reference signal over the second time period.
The method according to any one of claims 14-16, before sending the DCI, further comprising:

Sending configuration information of the reference signal, where the configuration information is used to indicate that the reference signal is used to demodulate data.
The method according to any one of claims 14-17, wherein the method further comprises:

Determining whether the number N of frequency domain units of the first uplink physical resource is greater than a pre-configured value;

If the number N of frequency domain units of the first uplink physical resource is greater than the pre-configured value, determining that the number M of frequency domain units occupied by the first DM-RS is less than the frequency of the first uplink physical resource The number of domain units N.
The method according to any one of claims 14 to 18, wherein the first time period and the second time period belong to the same time period, or the second time period is at the first time After the paragraph.
The method according to any one of claims 14 to 19, wherein the first DCI is further configured to instruct the terminal device to send a physical antenna port of the reference signal and a terminal of the first DM-RS. The physical antenna port is the same, and / or the precoding matrix used for sending the reference signal is the same as the precoding matrix used for sending the first DM-RS, and / or the spatial filtering information of the reference signal is Spatial filtering information of the first DM-RS is the same, and / or, the number of ports of the reference signal is the same as the number of ports of the first DM-RS, and the port of the reference signal is the same as the first DM -RS ports are mapped one by one.
The method according to any one of claims 14-20, comprising:

Send a second DCI, where the second DCI includes information about a second uplink physical resource in a third time period, where the third time period is after the first time period, a frequency domain unit of the second uplink physical resource At least a portion of the overlapping with at least a portion of a frequency domain unit of the first uplink physical resource;

Receiving second DM-RS and second data information on the second uplink physical resource, and the number of frequency domain units occupied by the second DM-RS is less than the frequency domain units occupied by the first DM-RS The number M.
The method according to claim 21, comprising:

Receiving DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period.
The method according to any one of claims 14 to 22, comprising:

The first DCI further includes first signaling, where the first signaling is used to indicate the number of frequency domain units M and frequency domain locations occupied by the first DM-RS, and / or, the reference The number of frequency domain units and frequency domain locations occupied by the signal.
The method according to claim 23, wherein the number M and frequency domain locations of the frequency domain units occupied by the first DM-RS include:

M consecutive frequency domain units starting from the lowest frequency in the first uplink physical resource; or

M consecutive frequency domain units starting from the highest frequency in the first uplink physical resource; or

M discrete frequency domain units in the first uplink physical resource.
The method according to claim 24, wherein a frequency domain unit occupied by the reference signal is determined according to a frequency domain unit occupied by the first DM-RS; or

The frequency domain unit occupied by the first DM-RS is determined according to the frequency domain unit occupied by the reference signal.
The method according to any one of claims 14 to 25, comprising:

The first DCI further includes transmission layer number indication information, and the transmission layer number indication information is used to indicate the number of data transmission layers on the first uplink physical resource, and the number of ports of the reference signal and the transmission layer The number of transmission layers indicated by the number indication information is the same.
A communication device includes a processor and a transceiver coupled to the processor;

The processor is configured to receive first downlink control information DCI through the transceiver, where the first DCI includes information of a first uplink physical resource in a first time period;

The processor is further configured to send a first demodulation reference signal DM-RS and first data information on the first uplink physical resource through the transceiver, and send the reference signal in the second time period. The number M of frequency domain units occupied by the first DM-RS is less than the number N of frequency domain units of the first uplink physical resource, and at least a part of the frequency domain units occupied by the reference signal is related to the first uplink. At least a part of the frequency domain units of the physical resources overlap, and M and N are integers greater than or equal to 1.
The apparatus according to claim 27, wherein the frequency domain unit occupied by the reference signal comprises a frequency domain unit of the first uplink physical resource that is not occupied by the first DM-RS At least a part of the unit.
The apparatus according to claim 27 or 28, wherein the first DCI further comprises a reference signal trigger request, wherein the reference signal trigger request is used to instruct to send the reference signal in the second time period And / or, the reference signal trigger request is used to indicate a frequency domain unit occupied by sending the reference signal in the second time period, and / or, the reference signal trigger request is used to indicate that A resource pattern (Pattern) used for sending the reference signal in the second time period, and / or, the reference signal trigger request is used to instruct sending the first DM-RS, the first data information, and The spatial filtering information used for sending the reference signal on the second time period.
The apparatus according to any one of claims 27-29, wherein before receiving the DCI,

The processor is further configured to receive configuration information of the reference signal through the transceiver, where the configuration information is used to indicate that the reference signal is used to demodulate data.
The device according to any one of claims 27-30, wherein:

The processor is configured to determine whether the number N of frequency domain units of the first uplink physical resource is greater than a pre-configured value;

If the number N of frequency domain units of the first uplink physical resource is greater than the pre-configured value, determining that the number M of frequency domain units occupied by the first DM-RS is less than the frequency of the first uplink physical resource The number of domain units N.
The device according to any one of claims 27-31, wherein the first time period and the second time period belong to the same time period, or the second time period is at the first time After the paragraph.
The apparatus according to any one of claims 27 to 32, wherein a physical antenna port transmitting the reference signal is the same as a physical antenna port transmitting the first DM-RS, and / or, transmitting the reference The precoding matrix used for the signal is the same as the precoding matrix used for sending the first DM-RS, and / or the spatial filtering information of the reference signal is the same as the spatial filtering information of the first DM-RS, And / or, the number of ports of the reference signal is the same as the number of ports of the first DM-RS, and the ports of the reference signal and the ports of the first DM-RS are mapped one by one.
The device according to any one of claims 27-33, comprising:

The processor is configured to receive a second DCI through the transceiver, where the second DCI includes information about a second uplink physical resource in a third time period, where the third time period is after the first time period, At least a part of a frequency domain unit of the second uplink physical resource overlaps with at least a part of a frequency domain unit of the first uplink physical resource;

The processor is further configured to send a second DM-RS and second data information on the second uplink physical resource through the transceiver, and the number of frequency domain units occupied by the second DM-RS is less than The number M of frequency domain units occupied by the first DM-RS.
The device according to claim 34, wherein:

The processor is configured to send, via the transceiver, DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period.
The device according to any one of claims 27-35, comprising:

The first DCI further includes first signaling, where the first signaling is used to indicate the number of frequency domain units M and frequency domain locations occupied by the first DM-RS, and / or, the reference The number of frequency domain units and frequency domain locations occupied by the signal.
The apparatus according to claim 36, wherein the number M and the frequency domain position of the frequency domain units occupied by the first DM-RS include:

M consecutive frequency domain units starting from the lowest frequency in the first uplink physical resource;

M consecutive frequency domain units starting from the highest frequency in the first uplink physical resource;

M discrete frequency domain units in the first uplink physical resource.
The apparatus according to claim 37, wherein a frequency domain unit occupied by the reference signal is determined according to a frequency domain unit occupied by the first DM-RS; or

The frequency domain unit occupied by the first DM-RS is determined according to the frequency domain unit occupied by the reference signal.
The apparatus according to any one of claims 27 to 38, wherein the first DCI further includes transmission layer number indication information, and the transmission layer number indication information is used to instruct the first uplink physical resource The number of layers for data transmission, the number of ports of the reference signal, and the number of transmission layers indicated by the transmission layer number indication information.
A communication device includes a processor and a transceiver coupled to the processor;

The processor is configured to send first downlink control information DCI through the transceiver, where the first DCI includes information of a first uplink physical resource in a first time period;

The processor is further configured to receive the first demodulation reference signal DM-RS and the first data information sent by the terminal device on the first uplink physical resource through the transceiver, and receive the first demodulation reference signal DM-RS and the first data information in the second time period. For a reference signal, the number M of frequency domain units occupied by the first DM-RS is less than the number N of frequency domain units of the first uplink physical resource, and at least a part of the frequency domain units occupied by the reference signal is related to the number of At least a part of the frequency domain units of the first uplink physical resource overlap, and M, N are integers greater than or equal to 1.
The device according to claim 40, wherein the frequency domain unit occupied by the reference signal includes a frequency domain unit of the first uplink physical resource that is not occupied by the first DM-RS At least a part of the unit.
The apparatus according to claim 40 or 41, wherein the first DCI further comprises a reference signal trigger request, wherein the reference signal trigger request is used to instruct the terminal device to send in the second time period The reference signal, and / or, the reference signal trigger request is used to instruct the terminal device to send a frequency domain unit occupied by the reference signal in the second time period, and / or, the reference signal The trigger request is used to instruct the terminal device to send a resource pattern (Pattern) used by the reference signal in the second time period, and / or the reference signal trigger request is used to instruct the first DM to be sent. -RS, the first data information, and spatial filtering information used to send the reference signal over the second time period.
The apparatus according to any one of claims 40-42, wherein before sending the DCI,

The processor is configured to send configuration information of a reference signal through the transceiver, where the configuration information is used to indicate that the reference signal is used to demodulate data.
The device according to any one of claims 40-43, wherein:

The processor is configured to determine whether the number N of frequency domain units of the first uplink physical resource is greater than a pre-configured value;

If the number of frequency domain units of the first uplink physical resource is greater than the pre-configured value, determining that the number of frequency domain units M occupied by the first DM-RS is less than the frequency domain of the first uplink physical resource Number of units N.
The device according to any one of claims 40-44, wherein the first time period and the second time period belong to the same time period, or the second time period is at the first time After the paragraph.
The apparatus according to any one of claims 40-45, wherein the first DCI is further used to instruct the terminal device to send a physical antenna port of the reference signal and a terminal of the first DM-RS. The physical antenna port is the same, and / or the precoding matrix used for sending the reference signal is the same as the precoding matrix used for sending the first DM-RS, and / or the spatial filtering information of the reference signal is Spatial filtering information of the first DM-RS is the same, and / or, the number of ports of the reference signal is the same as the number of ports of the first DM-RS, and the port of the reference signal is the same as the first DM -RS ports are mapped one by one.
The device according to any one of claims 40 to 46, wherein

The processor is configured to send a second DCI through the transceiver, where the second DCI includes information about a second uplink physical resource in a third time period, where the third time period is after the first time period, At least a part of a frequency domain unit of the second uplink physical resource overlaps with at least a part of a frequency domain unit of the first uplink physical resource;

The processor is further configured to receive a second DM-RS and second data information on the second uplink physical resource through the transceiver, and the number of frequency domain units occupied by the second DM-RS is less than The number M of frequency domain units occupied by the first DM-RS.
The device according to claim 47, wherein:

The processor is configured to receive, via the transceiver, DM-RS and data information on uplink physical resources in at least one time period between the first time period and the third time period.
The apparatus according to any one of claims 40 to 48, wherein the first DCI further includes first signaling, and the first signaling is used to indicate a space occupied by the first DM-RS. The number M of frequency-domain units and frequency-domain locations, and / or the number of frequency-domain units and frequency-domain locations occupied by the reference signal.
The apparatus according to claim 49, wherein the number M and frequency domain locations of the frequency domain units occupied by the first DM-RS include:

M consecutive frequency domain units starting from the lowest frequency in the first uplink physical resource;

M consecutive frequency domain units starting from the highest frequency in the first uplink physical resource;

M discrete frequency domain units in the first uplink physical resource.
The apparatus according to claim 50, wherein the frequency domain unit occupied by the reference signal is determined according to the frequency domain unit occupied by the first DM-RS; or

The frequency domain unit occupied by the first DM-RS is determined according to the frequency domain unit occupied by the reference signal.
The apparatus according to any one of claims 40-51, wherein the first DCI further includes transmission layer number indication information, and the transmission layer number indication information is used to instruct the first uplink physical resource The number of layers for data transmission, the number of ports of the reference signal, and the number of transmission layers indicated by the transmission layer number indication information.
A computer-readable access medium is used to store instructions, and when the instructions are run on a computer, cause the computer to execute the method according to any one of claims 1-13.
A computer-readable access medium is used to store instructions, and when the instructions are run on a computer, cause the computer to execute the method according to any one of claims 14-26.
A communication device, comprising a processor and a memory coupled to the processor, the memory is used to store instructions, and the processor is used to read and call the instructions to execute claims 1-13 The method of any one.
A communication device, comprising a processor and a memory coupled to the processor, the memory is used to store instructions, and the processor is used to read and call the instructions to execute claims 14-26 The method of any one.