WO2022056849A1 - 发送dmrs的方法、装置、终端和介质 - Google Patents

发送dmrs的方法、装置、终端和介质 Download PDF

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Publication number
WO2022056849A1
WO2022056849A1 PCT/CN2020/116235 CN2020116235W WO2022056849A1 WO 2022056849 A1 WO2022056849 A1 WO 2022056849A1 CN 2020116235 W CN2020116235 W CN 2020116235W WO 2022056849 A1 WO2022056849 A1 WO 2022056849A1
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Prior art keywords
dmrs
transmit power
frequency resources
terminal
frequency resource
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PCT/CN2020/116235
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English (en)
French (fr)
Inventor
李媛媛
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北京小米移动软件有限公司
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Priority to CN202080002377.4A priority Critical patent/CN112243596B/zh
Priority to US18/026,315 priority patent/US20230354206A1/en
Priority to PCT/CN2020/116235 priority patent/WO2022056849A1/zh
Priority to EP20953707.5A priority patent/EP4216618A4/en
Publication of WO2022056849A1 publication Critical patent/WO2022056849A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0026—Division using four or more dimensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J2013/165—Joint allocation of code together with frequency or time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a method, apparatus, terminal, and medium for sending DMRS.
  • a demodulation reference signal (Demodulation Reference Signal, DMRS) is mainly used to assist the system to obtain a channel estimation value.
  • DMRS Demodulation Reference Signal
  • frequency resources corresponding to symbols used for transmitting DMRS are divided into at least two CDM groups in the frequency domain, and different CDM groups are frequency-division multiplexed.
  • the frequency resources corresponding to different CDM groups can be occupied by different terminals, and the terminals can send DMRS through the frequency resources corresponding to the CDM groups occupied by themselves.
  • the frequency resource corresponding to the CDM group occupied by other terminals is reserved for use, so as to avoid interference to the DMRS sent by other terminals.
  • the terminal can occupy the second transmit power that should be allocated on the frequency resources used by other terminals to transmit DMRS, thereby increasing the transmit power of the DMRS, so that the network device can receive the DMRS and perform channel estimation according to the received DMRS.
  • DMRS will be sent on the frequency resource corresponding to the CDM group occupied by the terminal itself, and no other terminal will send DMRS on other frequency resources, the terminal will send DMRS on other frequency resources.
  • Send data on the DMRS but cannot occupy the second transmission power on other frequency resources to send DMRS.
  • the DMRS sent by the terminal reaches the network side, the received power is too low, and the network equipment cannot use the DMRS for accurate channel estimation, which affects the system performance.
  • the embodiments of the present disclosure provide a method, an apparatus, a terminal, and a medium for sending a DMRS.
  • the technical solution is as follows:
  • a method for sending a DMRS comprising:
  • the first transmit power for transmitting the first DMRS on the first frequency resource based on the control information from the network device, where the first frequency resource is the frequency corresponding to the first CDM group in the frequency resource corresponding to the first symbol resource, the first transmit power occupies at least part of the second transmit power on other frequency resources except the first frequency resource in the frequency resources corresponding to the first symbol, and the other frequency resources are not used for sending the second DMRS;
  • the first DMRS is sent on the first frequency resource based on the first transmit power.
  • the method further includes:
  • the method further includes:
  • a method for receiving a DMRS comprising:
  • the first DMRS is sent by the terminal on the first frequency resource with a first transmit power, the first transmit power is determined by the terminal based on the control information, and the first frequency resource is The frequency resources corresponding to the first CDM group in the frequency resources corresponding to the first symbol, and the first transmit power occupies other frequency resources except the first frequency resources in the frequency resources corresponding to the first symbol. At least a portion of the second transmit power, the other frequency resources are not used for transmitting the second DMRS.
  • control information is used to instruct the terminal to occupy the second transmit power on the other frequency resources when determining the first transmit power.
  • control information is used to indicate that a part of the CDM groups in the multiple CDM groups corresponding to the first symbol is used for sending DMRS, and the first CDM group belongs to the part of the CDM group.
  • the partial CDM group is one CDM group.
  • the first transmit power occupies XdB of the second transmit power, where X is a default value, or X is a configuration value configured by the network device.
  • the X is selected from the following values: 0.5, 1, 2, 3; for DMRS type 2, the X is selected from the following values: 0.5, 1, 2, 3, 4.77.
  • the default value is the maximum value in the value range of the configuration value.
  • control information includes the configuration value.
  • the first transmit power is greater than the second transmit power after being occupied.
  • an apparatus for sending a DMRS comprising:
  • the determining module is configured to determine, based on control information from the network device, a first transmit power for transmitting the first DMRS on a first frequency resource, where the first frequency resource is the frequency resource corresponding to the first symbol that is the same as the first frequency resource.
  • the first transmit power occupies at least part of the second transmit power on other frequency resources except the first frequency resource in the frequency resource corresponding to the first symbol, and the other frequency resources are not used for sending the second DMRS;
  • a sending module configured to send the first DMRS on the first frequency resource based on the first transmit power.
  • an apparatus for receiving a DMRS comprising:
  • a sending module configured to send control information
  • a receiving module configured to receive the first DMRS from the terminal
  • the first DMRS is sent by the terminal on the first frequency resource with a first transmit power, the first transmit power is determined by the terminal based on the control information, and the first frequency resource is The frequency resources corresponding to the first CDM group in the frequency resources corresponding to the first symbol, and the first transmit power occupies other frequency resources except the first frequency resources in the frequency resources corresponding to the first symbol. At least a portion of the second transmit power, the other frequency resources are not used for transmitting the second DMRS.
  • a terminal comprising:
  • memory for storing processor-executable instructions
  • the processor is configured to load and execute the executable instructions to implement the method for sending a DMRS according to any one of the foregoing.
  • a network device includes:
  • memory for storing processor-executable instructions
  • the processor is configured to load and execute the executable instructions to implement the method for receiving a DMRS as described in any preceding item.
  • a computer-readable storage medium When instructions in the computer-readable storage medium are executed by a processor, the method for sending a DMRS as described in the foregoing aspect can be performed or the method as described in the foregoing aspect can be performed. The method for receiving DMRS described in the foregoing aspects.
  • the adopted first transmit power occupies other frequency resources except the first frequency resource in the frequency resources corresponding to the first symbol and other frequency resources are not used for transmitting the second DMRS, in this case, by occupying the second transmission power on the other frequency resources, the first transmission of the first DMRS is improved
  • the network device can receive the first DMRS sent by the terminal with appropriate receiving power and use the first DMRS to perform accurate channel estimation, which is beneficial to improve system performance.
  • FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a DMRS type shown according to an exemplary embodiment
  • FIG. 3 is a schematic structural diagram of another DMRS type shown according to an exemplary embodiment
  • FIG. 4 is a schematic structural diagram of another DMRS type shown according to an exemplary embodiment
  • FIG. 5 is a schematic structural diagram of another DMRS type shown according to an exemplary embodiment
  • FIG. 6 is a flowchart of a method for sending DMRS according to an exemplary embodiment
  • FIG. 7 is a flowchart of a method for receiving a DMRS according to an exemplary embodiment
  • FIG. 8 is a flowchart of a method for transmitting DMRS according to an exemplary embodiment
  • FIG. 9 is a schematic structural diagram of an apparatus for sending DMRS according to an exemplary embodiment
  • FIG. 10 is a schematic structural diagram of an apparatus for receiving DMRS according to an exemplary embodiment
  • FIG. 11 is a block diagram of a terminal according to an exemplary embodiment
  • Fig. 12 is a block diagram of a network device according to an exemplary embodiment.
  • first, second, third, etc. may be used in embodiments of the present disclosure to describe various pieces of information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information.
  • the words "if” and “if” as used herein can be interpreted as "at the time of” or "when” or "in response to determining.”
  • FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure.
  • the communication system may include: a network side 12 and a terminal 13 .
  • the network side 12 includes several network devices 120 .
  • the network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal.
  • the base station may be a base station of a serving cell of the terminal 13 or a base station of a neighboring cell of the serving cell of the terminal 13 .
  • the base station may include various forms of macro base station, micro base station, relay station, access point, transmission reception point (Transmission Reception Point, TRP) and so on.
  • TRP Transmission Reception Point
  • the names of devices with base station functions may be different. In 5G NR systems, they are called gNodeBs or gNBs. With the evolution of communication technology, the name "base station" may be descriptive and will change.
  • the network device 120 may also be a location management function entity (Location Management Function, LMF).
  • LMF Location Management Function
  • the terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to the wireless modem, as well as various forms of user equipment, mobile stations (Mobile Station, MS), Terminal, Internet of Things (Internet of Things, IoT), Industrial Internet of Things (Industry Internet of Things, IIoT) and so on.
  • mobile stations Mobile Station, MS
  • Terminal Internet of Things (Internet of Things, IoT), Industrial Internet of Things (Industry Internet of Things, IIoT) and so on.
  • IoT Internet of Things
  • Industrial Internet of Things Industrial Internet of Things
  • the communication systems and service scenarios described in the embodiments of the present disclosure are for the purpose of illustrating the technical solutions of the embodiments of the present disclosure more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure.
  • the evolution of new business scenarios and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.
  • the structure of the DMRS in the NR system is first introduced below.
  • the DMRS is used for terminal channel estimation and coherent demodulation of the Physical Downlink Shared Channel (PDSCH). This DMRS only appears in the PDSCH transmission resource blocks.
  • the DMRS used for the Physical Uplink Shared Channel (PUSCH) is used for coherent demodulation of the PUSCH by the network device.
  • Embodiments of the present disclosure are mainly aimed at, but not limited to, DMRS for PUSCH.
  • mapping type A the first OFDM symbol used to transmit DMRS is located in the 2nd or 3rd OFDM symbol in the slot.
  • mapping type B the first OFDM symbol used to transmit DMRS is located in the first OFDM symbol used to transmit data.
  • DMRS is further divided into two types: DMRS type 1 and DMRS type 2. Both types of DMRS include one OFDM symbol (single-symbol DMRS) or 2 OFDM symbols (dual-symbol DMRS).
  • FIG. 2 to FIG. 5 respectively show the structure of one resource block.
  • one resource block includes 14 OFDM symbols and 12 subcarriers, and one OFDM symbol and one subcarrier are a resource element (Resource Element). , RE).
  • Resource Element resource element
  • RE resource element
  • Single-symbol DMRS The subcarriers in an OFDM symbol are divided into two groups of frequency-divided comb resources, wherein each group of comb resources constitutes a Code Division Multiplexing (CDM) group, that is, , the frequency resources corresponding to the symbols used for transmitting the DMRS are divided into two CDM groups.
  • CDM group the sub-carriers with even numbers (ie 0, 2, 4, 6, 8, 10) are a CDM group (CDM group 1)
  • the subcarriers with odd numbers (ie 1, 3, 5, 7, 9) , 11) subcarriers are another CDM group (CDM group 2).
  • the CDM group supports 2-port multiplexing through 2 Orthogonal Cover Codes (OCC), and supports up to 4 ports.
  • Dual-symbol DMRS The division method of the CDM group is the same as that corresponding to the single-symbol DMRS. On the basis of the single-symbol DMRS structure, time-domain OCC is added. As shown in Figure 3, each CDM group occupies two consecutive OFDM symbols, and each CDM group implements four orthogonal ports through four time-frequency domain OCCs. So up to 8 ports are supported.
  • Single-symbol DMRS The sub-carriers in one OFDM symbol are divided into 3 CDM groups, and each CDM group is composed of two pairs of adjacent two sub-carriers. As shown in Figure 4, the subcarriers numbered 0, 1, 6, and 7 are one CDM group (CDM group 1), and the subcarriers numbered 2, 3, 8, and 9 are another CDM group (CDM group 2) , and the subcarriers numbered 4, 5, 10, and 11 are another CDM group (CDM group 3).
  • CDM group 1 CDM group
  • CDM group 2 the subcarriers numbered 2, 3, 8, and 9 are another CDM group
  • CDM group 3 the subcarriers numbered 4
  • Two OCCs within a CDM group support 2-port multiplexing, and frequency division multiplexing (FDM) between CDM groups, so a maximum of 6 ports are supported.
  • Dual-symbol DMRS The division method of the CDM group is the same as the division method corresponding to the single-symbol DMRS, and the time domain OCC is added on the basis of the single-symbol structure. As shown in Figure 5, each CDM group occupies two consecutive OFDM. Notation, 3 CDM groups support up to 12 ports.
  • the structure of the DMRS used in the transmission can be configured by the network equipment.
  • the network device will indicate through a scheduling command whether the terminal should use single-symbol DMRS or dual-symbol DMRS in a certain transmission.
  • the scheduling command will also inform the terminal which CDM groups will be used by other terminals to send DMRS in this scheduled transmission at the same time, so that the terminal will avoid the frequency resources where the DMRS of itself and other terminals are located during data mapping. That is, the terminal reserves the frequency resources corresponding to other CDM groups to avoid interference to the DMRS of other terminals.
  • the terminal may occupy at least part of the second transmit power on the frequency resources corresponding to the CDM groups occupied by other terminals, or it may be considered as borrowing power from the frequency resources corresponding to the CDM groups occupied by other terminals For example, all or part of the power used for data transmission on the frequency resources corresponding to the CDM group occupied by other terminals is borrowed to transmit the DMRS, so as to increase the transmission power of the DMRS.
  • the terminal transmits data on the frequency resources corresponding to the other CDM groups, that is, the frequency resources corresponding to the symbols used for transmitting DMRS are not occupied by other terminals. In the case where all of them are used for transmitting DMRS, the terminal transmits data on the frequency resources that are not used for transmitting DMRS. In the related art, the terminal uses the same transmit power on each RE in the symbol used for transmitting the DMRS. In an area with better signal coverage, for example, where the terminal is located in the middle of a cell, the network device can normally receive the DMRS and perform accurate channel estimation. However, in an area with poor signal coverage, for example, where the terminal is located at the edge of a cell, the network device cannot perform accurate channel estimation due to the weak DMRS signal.
  • the embodiments of the present disclosure provide a method for transmitting and/or receiving DMRS, which can increase the transmission power of DMRS in the case where the frequency resources corresponding to symbols used for transmitting DMRS are not all used for transmitting DMRS, so as to Since the network device can well receive the DMRS and accurately perform channel estimation according to the DMRS, it is beneficial to improve the system performance.
  • Fig. 6 is a flowchart of a method for sending a DMRS according to an exemplary embodiment. The method can be executed by the terminal, referring to FIG. 6 , the method includes the following steps:
  • step 101 based on control information from a network device, determine a first transmit power for transmitting a first DMRS on a first frequency resource, where the first frequency resource is the frequency resource corresponding to the first symbol that is the same as the first For the frequency resources corresponding to the CDM group, the first transmit power occupies at least part of the second transmit power on other frequency resources except the first frequency resource in the frequency resources corresponding to the first symbol, and the other frequency resources are not used to transmit the second DMRS;
  • step 102 the first DMRS is sent on the first frequency resource based on the first transmit power.
  • occupied transmit power may also be referred to as borrowed transmit power, which refers to increasing the original transmit power on the frequency resources corresponding to the CDM group occupied by the terminal by XdB to obtain the first transmit power.
  • the original transmit power (ie, the second transmit power) on other frequency resources other than the frequency resource corresponding to the occupied CDM group is reduced by XdB, and X is greater than 0.
  • control information is used to instruct the terminal to occupy the second transmit power on the other frequency resources when determining the first transmit power.
  • control information is used to indicate that a part of the CDM groups in the multiple CDM groups corresponding to the first symbol is used for sending DMRS, and the first CDM group belongs to the part of the CDM group.
  • the partial CDM group is one CDM group.
  • the first transmit power occupies XdB of the second transmit power, where X is a default value. That is, the terminal borrows power from the frequency resource corresponding to the unoccupied CDM group according to the default value.
  • X is a configuration value configured by the network device. That is, the terminal borrows power from the frequency resource corresponding to the unoccupied CDM group according to the configuration value configured by the network device.
  • the X is selected from the following values: 0.5, 1, 2, 3; for DMRS type 2, the X is selected from the following values: 0.5, 1, 2, 3, 4.77.
  • the default value is the maximum value in the value range of the configuration value.
  • control information includes the configuration value.
  • the method further includes:
  • the method further includes:
  • No data is sent on the other frequency resources.
  • data is not mapped on the other frequency resources.
  • the first transmit power is greater than the second transmit power after being occupied.
  • Fig. 7 is a flowchart of a method for receiving a DMRS according to an exemplary embodiment. The method can be performed by a network device, see FIG. 7 , and the method includes the following steps:
  • step 201 send control information
  • step 202 the first DMRS from the terminal is received.
  • the first DMRS is sent by the terminal on the first frequency resource with a first transmit power, the first transmit power is determined by the terminal based on the control information, and the first frequency resource is Among the frequency resources corresponding to the first symbol, the frequency resources corresponding to the first CDM group, the first transmit power occupies other frequency resources except the first frequency resource in the frequency resources corresponding to the first symbol. At least a portion of the second transmit power, the other frequency resources are not used for transmitting the second DMRS.
  • the first transmit power is greater than the second transmit power after being occupied.
  • FIG. 8 is a flowchart illustrating a method for transmitting DMRS (ie, sending and receiving DMRS) according to an exemplary embodiment. The method can be executed jointly by the terminal and the network device. Referring to Figure 8, the method includes the following steps:
  • step 301 the network device sends control information.
  • the control information is used to instruct the first terminal to occupy at least part of the second transmit power when determining the first transmit power, where the first transmit power is used by the first terminal to transmit on the first frequency resource
  • the transmission power of the first DMRS the first frequency resource is the frequency resource corresponding to the first CDM group in the frequency resources corresponding to the first symbol
  • the first CDM group is the CDM group occupied by the first terminal
  • the second transmission power The power is the transmit power on other frequency resources except the first transmit power in the frequency resources corresponding to the first symbol, and the other frequency resources are not used to transmit DMRS, that is, the CDM group corresponding to the other frequency resources is not allocated to any terminal use.
  • the control information includes one or more bits, and when the one or more bits take a value of a first value, it indicates that the first terminal is instructed to occupy when determining the first transmit power The second transmission power; when the one or more bits take the value of the second value, it indicates that the first terminal is instructed not to occupy the second transmission power when determining the first transmission power.
  • this manner of displaying the indication it is indicated whether the first terminal occupies the second transmit power when determining the first transmit power for transmitting the first DMRS.
  • the control information is used to indicate that a part of the CDM groups in the multiple CDM groups corresponding to the first symbol is used for sending DMRS, and the first CDM group belongs to the part of the CDM group. If the terminal determines, according to the control information, that only part of the CDM groups in the multiple CDM groups corresponding to the first symbol are used for transmitting DMRS, the terminal occupies the second transmission power when determining the first transmission power. Otherwise, if the terminal determines according to the control information that the multiple CDM groups corresponding to the first symbol are all used for transmitting DMRS, the second transmission power is not occupied when the first transmission power is determined. That is, by means of an implicit indication, the first terminal is instructed whether to occupy the second transmit power when determining the first transmit power for transmitting the first DMRS.
  • some of the CDM groups are one CDM group or multiple CDM groups.
  • the at least two CDM groups may be occupied by one terminal (for example, both are occupied by the first terminal), or may be occupied by at least two terminals.
  • part of the CDM group is one CDM group. That is, when it is determined that only one CDM group among the multiple CDM groups corresponding to the first symbol is occupied, the first terminal occupies the second transmission power when determining the first transmission power.
  • control information includes an identification (eg, number) of the CDM group occupied by the first terminal and the number of occupied CDM groups.
  • the first terminal may determine whether some CDM groups are occupied according to the number of occupied CDM groups and the number of CDM groups corresponding to the first symbol.
  • the first terminal determines the number of CDM groups corresponding to the first symbol according to the known DMRS types. For example, as described above, if it is DMRS type 1, the number of CDM groups is 2. If it is DMRS type 2, the number of CDM groups is 2. Then the number of CDM groups is 3. Then, the first terminal compares the number of occupied CDM groups in the control information with the number of CDM groups corresponding to the first symbol, and if the number of occupied CDM groups in the control information is less than the number of CDM groups corresponding to the first symbol , the first terminal determines that part of the CDM groups in the multiple CDM groups corresponding to the first symbol are occupied, that is, part of the CDM groups are used for sending DMRS.
  • DMRS type 1 the number of CDM groups is 2. If it is DMRS type 2, the number of CDM groups is 2. Then the number of CDM groups is 3. Then, the first terminal compares the number of occupied CDM groups in the control information with the number of CDM
  • the first terminal determines whether some CDM groups are occupied according to the number of occupied CDM groups in the control information.
  • the first terminal determines that the number of occupied CDM groups in the control information is equal to 1, it determines that part of the CDM groups among the multiple CDM groups corresponding to the symbols used for transmitting the DMRS are occupied. This is because the number of CDM groups corresponding to the first symbol must be greater than 1.
  • control information further includes indication information, where the indication information is used to indicate the value of the second transmit power occupied by the first terminal when determining the first transmit power, that is, the power value that can be borrowed from the second transmit power.
  • the second indication information is used to indicate that the first transmit power occupies XdB of the second transmit power.
  • the unit of the power borrow value is dB. That is, the power borrowing value is a relative value, which means that the power borrowing value is increased on the basis of the original power value.
  • the indication information is an X value, for example, 0.5, 1, etc.; or, the second indication information is an identifier corresponding to the X value, for example, 0 means 0.5, 1 means 1, 2 means 2, 3 means 3, 4 means 4.77 and so on.
  • the indication information includes two information elements, one for the X value of DMRS type 1 and the other for the X value of DMRS type 2.
  • X is selected from the following values: 0.5, 1, 2, 3; for DMRS type 2, X is selected from the following values: 0.5, 1, 2, 3, 4.77.
  • control information further includes the number of ports occupied by the first terminal and the like.
  • control information is downlink control information (Downlink Control Information, DCI).
  • DCI Downlink Control Information
  • step 302 the first terminal receives control information from the network device.
  • step 303 the first terminal determines the first transmit power based on the control information.
  • the first transmit power is equal to the sum of the original transmit power corresponding to the first frequency resource and XdB.
  • control information includes second indication information
  • X is a value indicated by the second indication information, that is, X is a configuration value configured by the network device.
  • control information does not include the second indication information, and X is a default value.
  • the default value is the maximum value in the value range of the configuration value corresponding to the DMRS type.
  • the default value is 3; for DMRS type 2, the default value is 4.77.
  • the original transmit power is the power used by the first terminal to transmit the first DMRS when the second transmit power is not used.
  • This embodiment of the present disclosure does not limit the manner of determining the original power value, for example, a default value may be adopted, or it may be determined according to a predetermined algorithm or rule, and so on.
  • step 304 the first terminal transmits a DMRS on the first frequency resource based on the first transmit power.
  • step 305 the first terminal transmits data on the other frequency resources based on the occupied second transmit power.
  • the first terminal maps data on REs corresponding to other frequency resources, and will transmit the data with the second transmission power.
  • the occupied power value is a relative value.
  • the first terminal will carry the first DMRS on the RE corresponding to the CDM group occupied by the first terminal, map data on the RE corresponding to the CDM group that is not occupied, and send the first symbol carrying with the same power. the first DMRS and data. Assuming that the first terminal sends the first DMRS and data carried by the first symbol at 10 dBm, then, assuming that the occupied power value is 3 dB, after using the method provided by the embodiment of the present disclosure, the first terminal will send the first DMRS at 13 dBm , the data in the same symbol as the first DMRS is sent at 7dBm.
  • the transmission power of sending the first DMRS on the first frequency resource is equal to the transmission power of sending data on other frequency resources.
  • the transmit power for sending the first DMRS on the first frequency resource is greater than the transmit power for sending data on other frequency resources, that is, the first transmit power is greater than the occupied second transmit power.
  • the occupied second transmit power is equal to the difference between the original transmit power corresponding to other frequency resources and XdB.
  • the occupied second transmit power may be zero. In still other examples, the occupied second transmit power is greater than zero.
  • the terminal does not map data on the resource elements corresponding to the unoccupied CDM group, so that data is not sent on other frequency resources, that is, step 205 does not need to be performed.
  • step 306 the network device receives the first DMRS.
  • the network device After receiving the first DMRS, the network device performs channel estimation according to the first DMRS. Since the transmit power of the first DMRS increases, the corresponding receive power of the network device also increases accordingly, so that channel estimation can be performed accurately .
  • the adopted first transmit power occupies other frequency resources except the first frequency resource in the frequency resources corresponding to the first symbol and other frequency resources are not used for transmitting the second DMRS, in this case, by occupying the second transmission power on the other frequency resources, the first transmission of the first DMRS is improved
  • the network device can receive the first DMRS sent by the terminal with appropriate receiving power and use the first DMRS to perform accurate channel estimation, which is beneficial to improve system performance.
  • FIG. 9 is a schematic structural diagram of an apparatus for sending a DMRS according to an exemplary embodiment.
  • the apparatus has the function of realizing the terminal in the above method embodiment, and the function may be realized by hardware, or by executing corresponding software in hardware.
  • the apparatus 400 includes: a determining module 401 and a sending module 402 .
  • the determining module 401 is configured to determine, based on control information from a network device, a first transmit power for transmitting the first DMRS on a first frequency resource, where the first frequency resource is one of the frequency resources corresponding to the first symbol a frequency resource corresponding to the first CDM group, the first transmit power occupies at least part of the second transmit power on other frequency resources except the first frequency resource in the frequency resource corresponding to the first symbol, The other frequency resources are not used for transmitting the second DMRS.
  • the sending module 402 is configured to send the first DMRS on the first frequency resource based on the first transmit power.
  • the sending module 402 is further configured to send data on the other frequency resources based on the occupied second transmit power.
  • the sending module 402 is further configured to not send data on the other frequency resources.
  • control information is used to instruct the terminal to occupy the second transmit power on the other frequency resources when determining the first transmit power.
  • control information is used to indicate that a part of the CDM groups in the multiple CDM groups corresponding to the first symbol is used for sending DMRS, and the first CDM group belongs to the part of the CDM group.
  • the partial CDM group is one CDM group.
  • the first transmit power occupies XdB of the second transmit power, where X is a default value, or X is a configuration value configured by the network device.
  • the X is selected from the following values: 0.5, 1, 2, 3; for DMRS type 2, the X is selected from the following values: 0.5, 1, 2, 3, 4.77.
  • the default value is the maximum value in the value range of the configuration value.
  • control information includes the configuration value.
  • the first transmit power is greater than the second transmit power after being occupied.
  • FIG. 10 is a schematic structural diagram of an apparatus for sending a DMRS according to an exemplary embodiment.
  • the apparatus has the function of implementing the network device in the above method embodiment, and the function may be implemented by hardware, or by executing corresponding software by hardware.
  • the apparatus 500 includes: a sending module 501 and a receiving module 502 .
  • the sending module 501 is configured to send control information; the receiving module 502 is configured to receive the first DMRS from the terminal.
  • the first DMRS is sent by the terminal on the first frequency resource with a first transmit power, the first transmit power is determined by the terminal based on the control information, and the first frequency resource is The frequency resources corresponding to the first CDM group in the frequency resources corresponding to the first symbol, and the first transmit power occupies other frequency resources except the first frequency resources in the frequency resources corresponding to the first symbol. At least a portion of the second transmit power, the other frequency resources are not used for transmitting the second DMRS.
  • control information is used to instruct the terminal to occupy the second transmit power on the other frequency resources when determining the first transmit power.
  • control information is used to indicate that a part of the CDM groups in the multiple CDM groups corresponding to the first symbol is used for sending DMRS, and the first CDM group belongs to the part of the CDM group.
  • the partial CDM group is one CDM group.
  • the first transmit power occupies XdB of the second transmit power, where X is a default value, or X is a configuration value configured by the network device.
  • the X is selected from the following values: 0.5, 1, 2, 3; for DMRS type 2, the X is selected from the following values: 0.5, 1, 2, 3, 4.77.
  • the default value is the maximum value in the value range of the configuration value.
  • control information includes the configuration value.
  • the first transmit power is greater than the second transmit power after being occupied.
  • FIG. 11 is a block diagram of a terminal 600 according to an exemplary embodiment.
  • the terminal 600 may include: a processor 601 , a receiver 602 , a transmitter 603 , a memory 604 and a bus 605 .
  • the processor 601 includes one or more processing cores, and the processor 601 executes various functional applications and information processing by running software programs and modules.
  • the receiver 602 and the transmitter 603 may be implemented as a communication component, which may be a communication chip.
  • the memory 604 is connected to the processor 601 through the bus 605 .
  • the memory 604 may be configured to store at least one instruction, and the processor 601 is configured to execute the at least one instruction, so as to execute the method performed by the terminal in the signal transmission method provided by the embodiment of the present disclosure.
  • memory 604 may be implemented by any type or combination of volatile or non-volatile storage devices including, but not limited to, magnetic or optical disks, electrically erasable programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Anytime Access Memory (SRAM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Programmable Read Only Memory (PROM) .
  • EEPROM electrically erasable programmable Read Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • SRAM Static Anytime Access Memory
  • ROM Read Only Memory
  • Magnetic Memory Magnetic Memory
  • Flash Memory Programmable Read Only Memory
  • a computer-readable storage medium stores at least one instruction, at least one piece of program, code set or instruction set, the at least one instruction, the At least one section of program, the code set or the instruction set is loaded and executed by the processor to implement the method for sending a DMRS provided by each of the above method embodiments.
  • Fig. 12 is a block diagram of a network device 700 according to an exemplary embodiment.
  • the network device 700 may include: a processor 701, a receiver 702, a transmitter 703 and a memory 704.
  • the receiver 702, the transmitter 703 and the memory 704 are respectively connected to the processor 701 through a bus.
  • the processor 701 includes one or more processing cores, and the processor 701 executes the method performed by the network device in the signal transmission method provided by the embodiments of the present disclosure by running software programs and modules.
  • Memory 704 may be used to store software programs and modules. Specifically, the memory 704 may store an operating system 7041 and an application program module 7042 required for at least one function.
  • the receiver 702 is used for receiving communication data sent by other devices, and the transmitter 703 is used for sending communication data to other devices.
  • a computer-readable storage medium stores at least one instruction, at least one piece of program, code set or instruction set, the at least one instruction, the At least one piece of program, the code set or the instruction set is loaded and executed by the processor to implement the method for receiving the DMRS provided by the above-mentioned various method embodiments.
  • An exemplary embodiment of the present disclosure also provides a communication system, where the communication system includes a terminal and a network device.
  • the terminal is the terminal provided by the embodiment shown in FIG. 11 .
  • the network device is the network device provided by the embodiment shown in FIG. 12 .

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Abstract

本公开是关于一种发送、接收DMRS的方法、装置、终端、设备和介质，属于通信技术领域。所述方法包括：基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS；基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。通过增大第一DMRS的发送功率，便于网络设备根据第一DMRS进行信道估计，有利于提高系统性能。

Description

发送DMRS的方法、装置、终端和介质 技术领域
本公开涉及通信技术领域，尤其涉及一种发送DMRS的方法、装置、终端和介质。
背景技术
在新空口(New Radio，NR)系统中，解调参考信号(Demodulation Reference Signal，DMRS)主要用于辅助系统获得信道估计值。
相关技术中，一个时隙内，用于传输DMRS的符号对应的频率资源在频域上被分为至少两个CDM组，不同的CDM组频分复用。不同的CDM组对应的频率资源可以被不同的终端占用，终端可以通过自身占用的CDM组对应的频率资源发送DMRS。终端通过自身占用的CDM组对应的频率资源发送DMRS时，会将其他终端占用的CDM组对应的频率资源预留不用，以避免对其他终端发送的DMRS造成干扰。这样，终端能够占用本应在被其他终端用于发送DMRS的频率资源上分配的第二发送功率，从而提高DMRS的发送功率，以便于网络设备接收到DMRS，并根据接收到的DMRS进行信道估计。
然而，如果用于传输DMRS的符号对应的频率资源中，除了终端自身占用的CDM组对应的频率资源上会发送DMRS，而没有其他终端在其他频率资源上发送DMRS时，终端会在其他频率资源上发送数据，而不能占用其他频率资源上的第二发送功率来发送DMRS。在这种情况下，在NR系统覆盖不良的区域，例如小区的覆盖边缘，终端发送的DMRS到达网络侧时，接收功率过低，网络设备无法利用DMRS进行准确地信道估计，影响系统性能。
发明内容
本公开实施例提供了一种发送DMRS的方法、装置、终端和介质。所述技术方案如下：
根据本公开实施例的一方面，提供一种发送DMRS的方法，所述方法包括：
基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一 DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS；
基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。
在一种可能的实施方式中，所述方法还包括：
基于被占用后的所述第二发送功率，在所述其他频率资源上发送数据。
在另一种可能的实施方式中，所述方法还包括：
在所述其他频率资源上不发送数据。
根据本公开实施例的一方面，提供一种接收DMRS的方法，所述方法包括：
发送控制信息；
接收来自终端的第一DMRS；
其中，所述第一DMRS是终端以第一发送功率在所述第一频率资源上发送的，所述第一发送功率是所述终端基于所述控制信息确定的，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。
可选地，所述控制信息用于指示所述终端在确定所述第一发送功率时占用所述其他频率资源上的第二发送功率。
可选地，所述控制信息用于指示所述第一符号对应的多个CDM组中的部分CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。
示例性地，所述部分CDM组为一个CDM组。
可选地，所述第一发送功率占用所述第二发送功率的XdB，其中，X为默认值，或者，X为由所述网络设备配置的配置值。
可选地，对于DMRS类型1，所述X选自以下值：0.5、1、2、3；对于DMRS类型2，所述X选自以下值：0.5、1、2、3、4.77。
可选地，所述默认值为所述配置值的取值范围中的最大值。
可选地，所述控制信息包括所述配置值。
可选地，所述第一发送功率大于被占用后的所述第二发送功率。
根据本公开实施例的一方面，提供一种发送DMRS的装置，所述装置包括：
确定模块，被配置为基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS；
发送模块，被配置为基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。
根据本公开实施例的一方面，提供一种接收DMRS的装置，所述装置包括：
发送模块，被配置为发送控制信息；
接收模块，被配置为接收来自终端的第一DMRS；
其中，所述第一DMRS是终端以第一发送功率在所述第一频率资源上发送的，所述第一发送功率是所述终端基于所述控制信息确定的，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。
根据本公开实施例的一方面，提供一种终端，所述终端包括：
处理器；
用于存储处理器可执行指令的存储器；
其中，所述处理器被配置为加载并执行所述可执行指令以实现如前述任一项所述的发送DMRS的方法。
根据本公开实施例的一方面，提供一种网络设备，所述网络设备包括：
处理器；
用于存储处理器可执行指令的存储器；
其中，所述处理器被配置为加载并执行所述可执行指令以实现如前述任一项所述的接收DMRS的方法。
根据本公开实施例的一方面，提供一种计算机可读存储介质，当所述计算机可读存储介质中的指令由处理器执行时，能够执行如前述方面所述的发送DMRS的方法或者执行如前述方面所述的接收DMRS的方法。
在本公开实施例中，终端在第一频率资源上发送第一DMRS时，采用的第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，且其他频率资源未被用于发送第二DMRS，在这种情况下，通过占用其他频率资源上的第二发送功率，提高了第一DMRS的第一发送功率，这样，在NR系统覆盖不良的区域，例如小区的覆盖边缘，网络设备能够通过合适的接收功率接收到终端发送的第一DMRS并利用第一DMRS进行准确地信道估计，有利于提高系统性能。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
图1示出的是本公开一个示意性实施例提供的通信系统的框图；
图2是根据一示例性实施例示出的一种DMRS类型的结构示意图；
图3是根据一示例性实施例示出的另一种DMRS类型的结构示意图；
图4是根据一示例性实施例示出的另一种DMRS类型的结构示意图；
图5是根据一示例性实施例示出的另一种DMRS类型的结构示意图；
图6是根据一示例性实施例示出的一种发送DMRS的方法的流程图；
图7是根据一示例性实施例示出的一种接收DMRS的方法的流程图；
图8是根据一示例性实施例示出的一种传输DMRS的方法的流程图；
图9是根据一示例性实施例示出的一种发送DMRS的装置的结构示意图；
图10是根据一示例性实施例示出的一种接收DMRS的装置的结构示意图；
图11是根据一示例性实施例示出的一种终端的框图；
图12是根据一示例性实施例示出的一种网络设备的框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
在本公开实施例使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开实施例。在本公开实施例和所附权利要求书中所使用的单数形式的“一种”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开实施例可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”及“若”可以被解释成为“在……时”或“当……时”或“响应于确定”。
应当理解，尽管在本公开实施例为了便于理解而编号的方式对步骤进行了说明，但是这些编号并不代表步骤的执行顺序，也并不代表采用顺序编号的步骤必须在一起执行。应当理解，采用顺序编号的多个步骤中的一个或几个步骤可以单独执行以解决相应的技术问题并达到预定的技术方案。即使是在附图中被示例性的列在一起的多个步骤，并不代表这些步骤必须被一起执行；附图只是为了便于理解而示例性的将这些步骤列在了一起。
图1示出的是本公开一个示意性实施例提供的通信系统的框图，如图1所示，该通信系统可以包括：网络侧12和终端13。
网络侧12中包括若干网络设备120。网络设备120可以是基站，基站是一种部署在接入网中用以为终端提供无线通信功能的装置。该基站既可以是终端13的服务小区的基站，也可以是终端13的服务小区相邻小区的基站。基站可以包括各种形式的宏基站，微基站，中继站，接入点、发送接收点(Transmission Reception Point，TRP)等等。在采用不同的无线接入技术的系统中，具备基站 功能的设备的名称可能会有所不同，在5G NR系统中，称为gNodeB或者gNB。随着通信技术的演进，“基站”这一名称可能描述，会变化。网络设备120也可以是定位管理功能实体(Location Management Function，LMF)。
终端13可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备，移动台(Mobile Station，MS)，终端，物联网设备(Internet of Things,IoT),工业物联网设备(Industry Internet of Things,IIoT)等等。为方便描述，上面提到的设备统称为终端。网络设备120与终端13之间通过某种空口技术互相通信，例如Uu接口。
本公开实施例描述的通信系统以及业务场景是为了更加清楚地说明本公开实施例的技术方案，并不构成对本公开实施例提供的技术方案的限定，本领域普通技术人员可知，随着通信系统的演变和新业务场景的出现，本公开实施例提供的技术方案对于类似的技术问题，同样适用。
为了便于理解本公开实施例，下面首先对NR系统中的DMRS的结构进行介绍。
在NR系统中，DMRS用于终端信道估计并进行物理下行共享信道(Physical Downlink Shared Channel，PDSCH)的相干解调，这种DMRS仅在PDSCH传输的资源块中出现。类似的，用于物理上行共享信道(Physical Uplink Shared Channel，PUSCH)的DMRS用于网络设备进行PUSCH的相干解调。本公开实施例主要针对但不限于用于PUSCH的DMRS。
NR系统中，DMRS存在两种映射类型。对于一个时隙，两种映射类型中用于传输DMRS的第一个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号的位置不同。两种映射类型分别为映射类型A和映射类型B。对于映射类型A，用于传输DMRS的第一个OFDM符号位于时隙内的第2个或第3个OFDM符号。对于映射类型B，用于传输DMRS的第一个OFDM符号位于用于传输数据的第一个OFDM符号中。
对于不同的映射类型，DMRS又分为两种类型：DMRS类型1和DMRS类型2。这两种类型的DMRS均包括一个OFDM符号(单符号DMRS)或者2个OFDM符号(双符号DMRS)。
下面均以映射类型A为例，结合图2至图5，对这两种类型的DMRS分别进行介绍。示例性地，图2至图5分别显示了一个资源块的结构，如图所示， 一个资源块包括14个OFDM符号和12个子载波，一个OFDM符号和一个子载波为一个资源元素(Resource Element，RE)。
DMRS类型1：
1)单符号DMRS：一个OFDM符号内的子载波被分为两组频分的梳状资源，其中，每组梳状资源构成一个码分复用(Code Division Multiplexing，CDM)组，也即是，用于传输DMRS的符号对应的频率资源被分为两个CDM组。如图2所示，编号为偶数(即0、2、4、6、8、10)的子载波为一个CDM组(CDM组1)，编号为奇数(即1、3、5、7、9、11)的子载波为另一个CDM组(CDM组2)。CDM组内部通过2个正交覆盖码(Orthogonal Cover Code，OCC)支持2端口复用，最多支持4个端口。
2)双符号DMRS：CDM组的划分方式与单符号DMRS对应的划分方式相同。在单符号DMRS结构的基础上增加时域OCC，如图3所示，每个CDM组占用连续的两个OFDM符号，每个CDM组通过4个时频域的OCC实现四个正交端口，因此最多支持8个端口。
DMRS类型2：
1)单符号DMRS：一个OFDM符号内的子载波被分为3个CDM组，每个CDM组由两对相邻的两个子载波构成。如图4所示，编号为0、1、6、7的子载波为一个CDM组(CDM组1)，编号为2、3、8、9的子载波为另一个CDM组(CDM组2)，编号为4、5、10、11的子载波为另一个CDM组(CDM组3)。CDM组内通过2个OCC支持2端口复用，CDM组间频分复用(Frequency Division Multiplexing，FDM)，因此最多支持6端口。
2)双符号DMRS：CDM组的划分方式与单符号DMRS对应的划分方式相同，在单符号结构的基础上增加了时域OCC，如图5所示，每个CDM组占用连续的两个OFDM符号，3个CDM组最多支持12个端口。
传输中使用的DMRS的结构可以由网络设备配置。网络设备会通过调度命令指示终端在某次传输中应该使用单符号DMRS还是双符号DMRS。并且，调度命令还会通知终端哪些CDM组会被其他终端在此次调度传输中同时用于发送DMRS，这样，终端在数据映射的时候，会避开自己和其他终端的DMRS所在的频率资源，也即是，终端会将其他CDM组对应的频率资源预留不用，以避免对其他终端DMRS产生干扰。在这种情况下，终端可以占用其他终端所占用的CDM组对应的频率资源上的第二发送功率的至少部分，也可以认为是，从其 他终端所占用的CDM组对应的频率资源上借用功率，例如，将用于在其他终端占用的CDM组对应的频率资源上传输数据用的功率全部或者部分借用来发送DMRS，以增大DMRS的发送功率。
而对于用于传输DMRS的符号中其他CDM组没有被其他终端占用的情况，终端在其他CDM组对应的频率资源上传输数据，也即是，在用于传输DMRS的符号对应的频率资源并未全部用于发送DMRS的情况下，终端在未用于发送DMRS的频率资源上传输数据。相关技术中，终端在该用于传输DMRS的符号内的各个RE上使用相同的发送功率。在信号覆盖质量较好的区域，例如，终端位于某小区中部，网络设备能够正常接收DMRS，并进行准确地信道估计。而在信号覆盖质量较差的区域，例如，终端位于某小区边缘，由于DMRS的信号较弱，网络设备无法进行准确地信道估计。
为此，本公开实施例提供了一种发送和/或接收DMRS的方法，能够在用于传输DMRS的符号对应的频率资源并未全部用于发送DMRS的情况下，提高DMRS的发送功率，以便于网络设备能够良好地接收DMRS并根据DMRS准确进行信道估计，有利于提升系统性能。
图6是根据一示例性实施例示出的一种发送DMRS的方法的流程图。该方法可以由终端执行，参见图6，该方法包括以下步骤：
在步骤101中，基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS；
在步骤102中，基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。
在本公开实施例中，占用发送功率也可以被称为借用发送功率，是指将终端占用的CDM组对应的频率资源上的原发送功率增大XdB，得到第一发送功率，同时，将终端占用的CDM组对应的频率资源以外的其他频率资源上的原发送功率(即第二发送功率)减小XdB，X大于0。
可选地，所述控制信息用于指示所述终端在确定所述第一发送功率时占用所述其他频率资源上的第二发送功率。
可选地，所述控制信息用于指示所述第一符号对应的多个CDM组中的部分CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。
示例性地，所述部分CDM组为一个CDM组。
可选地，所述第一发送功率占用所述第二发送功率的XdB，其中，X为默认值。也即是，终端按照默认值从所述未被占用的CDM组对应的频率资源借用功率。
可选地，X为由所述网络设备配置的配置值。也即是，终端按照网络设备配置的配置值从所述未被占用的CDM组对应的频率资源借用功率。
可选地，对于DMRS类型1，所述X选自以下值：0.5、1、2、3；对于DMRS类型2，所述X选自以下值：0.5、1、2、3、4.77。
可选地，所述默认值为所述配置值的取值范围中的最大值。
可选地，所述控制信息包括所述配置值。
在一种可能的实施方式中，所述方法还包括：
基于被占用后的所述第二发送功率，在所述其他频率资源上发送数据。
在另一种可能的实施方式中，所述方法还包括：
在所述其他频率资源上不发送数据。例如，在所述其他频率资源上不映射数据。
可选地，所述第一发送功率大于被占用后的所述第二发送功率。
值得说明的是，前述步骤101～步骤102与上述可选步骤可以任意组合。
图7是根据一示例性实施例示出的一种接收DMRS的方法的流程图。该方法可以由网络设备执行，参见图7，该方法包括以下步骤：
在步骤201中，发送控制信息；
在步骤202中，接收来自终端的第一DMRS。
其中，所述第一DMRS是终端以第一发送功率在所述第一频率资源上发送的，所述第一发送功率是所述终端基于所述控制信息确定的，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。
可选地，所述第一发送功率大于被占用后的所述第二发送功率。
关于占用发送功率和控制信息的相关内容，可以参见图6所示实施例，在此不再赘述。
前述步骤201～步骤202与上述可选步骤可以任意组合。
图8是根据一示例性实施例示出的一种传输DMRS(即发送和接收DMRS)的方法的流程图。该方法可以由终端和网络设备共同执行。参见图8，该方法包括以下步骤：
在步骤301中，网络设备发送控制信息。
在本公开实施例中，所述控制信息用于指示第一终端在确定第一发送功率时占用第二发送功率的至少部分，第一发送功率为第一终端用于在第一频率资源上发送第一DMRS的发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，第一CDM组即第一终端占用的CDM组，所述第二发送功率为第一符号对应的频率资源中除第一发送功率以外的其他频率资源上的发送功率，其他频率资源未被用于发送DMRS，也即是，其他频率资源对应的CDM组未分配给任何终端使用。
在一种可能的实施方式中，所述控制信息包括一个或多个比特，当这一个或多个比特取值为第一值时，表示指示第一终端在确定所述第一发送功率时占用第二发送功率；当这一个或多个比特取值为第二值时，表示指示第一终端在确定所述第一发送功率时不占用第二发送功率。通过这种显示指示的方式指示第一终端在确定发送第一DMRS的第一发送功率时，是否占用第二发送功率。
在另一种可能的实施方式中，该控制信息用于指示所述第一符号对应的多个CDM组中的部分CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。如果终端根据该控制信息确定出第一符号对应的多个CDM组中仅部分CDM组被用于发送DMRS，则在确定第一发送功率时，占用第二发送功率。否则，如果终端根据该控制信息确定出第一符号对应的多个CDM组均被用于发送DMRS，则在确定第一发送功率时，不占用第二发送功率。也即是，通过隐式指示的方式，指示第一终端在确定发送第一DMRS的第一发送功率时，是否占用第二发送功率。
可选地，部分CDM组为一个CDM组或者多个CDM组。当部分CDM组为至少两个CDM组时，这至少两个CDM组可以被一个终端占用(例如均被第一终端占用)，或者被至少两个终端占用。
示例性地，部分CDM组为一个CDM组。也即是，第一终端在确定出第一符号对应的多个CDM组中的仅一个CDM组被占用时，在确定第一发送功率时，占用第二发送功率。
在一些示例中，控制信息包括第一终端占用的CDM组的标识(例如编号)和被占用的CDM组的数量。
在一种可能的实施方式中，第一终端根据被占用的CDM组的数量和第一符号对应的CDM组的数量，可以确定是否部分CDM组被占用。
例如，第一终端根据已知的DMRS类型，确定第一符号对应的CDM组的数量，例如，如前所述，如果是DMRS类型1，则CDM组的数量为2，如果是DMRS类型2，则CDM组的数量为3。然后，第一终端将控制信息中的被占用的CDM组的数量与第一符号对应的CDM组的数量进行比较，如果控制信息中的被占用的CDM组的数量小于第一符号对应的CDM组的数量，则第一终端确定第一符号对应的多个CDM组中部分CDM组被占用，即部分CDM组被用于发送DMRS。
在另一种可能的实施方式中，第一终端根据控制信息中被占用的CDM组的数量，确定是否部分CDM组被占用。
例如，第一终端确定控制信息中的被占用的CDM组的数量等于1时，确定用于传输DMRS的符号对应的多个CDM组中部分CDM组被占用。这是因为，第一符号对应的CDM组的数量一定是大于1的。
可选地，该控制信息还包括指示信息，该指示信息用于指示第一终端在确定第一发送功率时，占用的第二发送功率的值，即能够从第二发送功率借用的功率值。例如，该第二指示信息用于指示第一发送功率占用第二发送功率的XdB。在本公开实施例中，功率借用值的单位均为dB。也即是，该功率借用值均为相对值，表示在原功率值的基础上，提高该功率借用值。
可选地，该指示信息为X值，例如，0.5，1等；或者，第二指示信息为X值对应的标识，例如，0表示0.5，1表示1，2表示2，3表示3，4表示4.77等等。
在一些示例中，该指示信息包括两个信息元素，一个针对DMRS类型1的X值，另一个针对DMRS类型2的X值。
可选地，对于DMRS类型1，X选自以下值：0.5、1、2、3；对于DMRS类型2，X选自以下值：0.5、1、2、3、4.77。
可选地，该控制信息还包括第一终端占用的端口数等等。
示例性地，该控制信息为下行控制信息(Downlink Control Information，DCI)。
在步骤302中，第一终端接收来自网络设备的控制信息。
在步骤303中，第一终端基于控制信息，确定第一发送功率。
第一发送功率等于第一频率资源对应的原发送功率与XdB之和。
在一种可能的实施方式中，控制信息包括第二指示信息，则X为第二指示信息指示的值，即X为由网络设备配置的配置值。
在另一种可能的实施方式中，控制信息不包括第二指示信息，X为默认值。
示例性地，当X为默认值时，默认为对应DMRS类型的配置值的取值范围中的最大值。例如，对于DMRS类型1，默认值为3；对于DMRS类型2，默认值为4.77。
这里，原发送功率即第一终端不占用第二发送功率时所采用的发送第一DMRS的功率。本公开实施例对原功率值的确定方式不做限定，例如，可以采用默认值，或者，根据预定的算法或者规则确定等等。
在步骤304中，第一终端基于所述第一发送功率，在第一频率资源上发送一DMRS。
在步骤305中，第一终端基于被占用后的所述第二发送功率，在所述其他频率资源上发送数据。
也即是，第一终端在其他频率资源对应的RE上映射数据，并将以第二发送功率发送该数据。
在本公开实施例中，占用的功率值为相对值。相关技术中，第一终端会在第一终端占用的CDM组对应的RE上承载第一DMRS，并且在未被占用的CDM组对应的RE上映射数据，并且以相同的功率发送第一符号承载的第一DMRS和数据。假设第一终端以10dBm发送该第一符号承载的第一DMRS和数据，那么，假设占用的功率值为3dB，那么采用本公开实施例提供的方法之后，第一终端将以13dBm发送第一DMRS，以7dBm发送与第一DMRS位于同一符号的数据。
也即是，在不占用功率的情况下，在第一符号对应的频率资源中，在第一频率资源上发送第一DMRS的发送功率和在其他频率资源上发送数据的发送功率相等，在占用功率的情况下，在第一频率资源上发送第一DMRS的发送功率 大于在其他频率资源上发送数据的发送功率，即第一发送功率大于被占用后的第二发送功率。
示例性地，被占用后的第二发送功率等于其他频率资源对应的原发送功率与XdB之差。在一些示例中，被占用后的第二发送功率可以为0。在又一些示例中，被占用后的第二发送功率大于0。
可替代地，在其他实施例中，终端在所述未被占用的CDM组对应的资源元素上不映射数据，从而不在其他频率资源上发送数据，也即是，无需执行步骤205。
在步骤306中，网络设备接收第一DMRS。
网络设备在接收到第一DMRS之后，根据第一DMRS进行信道估计，由于第一DMRS的发送功率有所增大，所以网络设备相应的接收功率也随之增大，从而能够准确地进行信道估计。
在本公开实施例中，终端在第一频率资源上发送第一DMRS时，采用的第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，且其他频率资源未被用于发送第二DMRS，在这种情况下，通过占用其他频率资源上的第二发送功率，提高了第一DMRS的第一发送功率，这样，在NR系统覆盖不良的区域，例如小区的覆盖边缘，网络设备能够通过合适的接收功率接收到终端发送的第一DMRS并利用第一DMRS进行准确地信道估计，有利于提高系统性能。
图9是根据一示例性实施例示出的一种发送DMRS的装置的结构示意图。该装置具有实现上述方法实施例中终端的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。如图9所示，该装置400包括：确定模块401和发送模块402。
其中，确定模块401被配置为基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。发送模块402被配置为基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。
在一种可能的实施方式中，所述发送模块402还被配置为，基于被占用后的所述第二发送功率，在所述其他频率资源上发送数据。
在另一种可能的实施方式中，所述发送模块402还被配置为，在所述其他频率资源上不发送数据。
可选地，所述控制信息用于指示所述终端在确定所述第一发送功率时占用所述其他频率资源上的第二发送功率。
可选地，所述控制信息用于指示所述第一符号对应的多个CDM组中的部分CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。
示例性地，所述部分CDM组为一个CDM组。
可选地，所述第一发送功率占用所述第二发送功率的XdB，其中，X为默认值，或者，X为由所述网络设备配置的配置值。
可选地，对于DMRS类型1，所述X选自以下值：0.5、1、2、3；对于DMRS类型2，所述X选自以下值：0.5、1、2、3、4.77。
可选地，所述默认值为所述配置值的取值范围中的最大值。
可选地，所述控制信息包括所述配置值。
可选地，所述第一发送功率大于被占用后的所述第二发送功率。
图10是根据一示例性实施例示出的一种发送DMRS的装置的结构示意图。该装置具有实现上述方法实施例中网络设备的功能，该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。如图10所示，该装置500包括：发送模块501和接收模块502。
其中，发送模块501被配置为发送控制信息；接收模块502被配置为接收来自终端的第一DMRS。其中，所述第一DMRS是终端以第一发送功率在所述第一频率资源上发送的，所述第一发送功率是所述终端基于所述控制信息确定的，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。
可选地，所述控制信息用于指示所述终端在确定所述第一发送功率时占用所述其他频率资源上的第二发送功率。
可选地，所述控制信息用于指示所述第一符号对应的多个CDM组中的部分 CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。
示例性地，所述部分CDM组为一个CDM组。
可选地，所述第一发送功率占用所述第二发送功率的XdB，其中，X为默认值，或者，X为由所述网络设备配置的配置值。
可选地，对于DMRS类型1，所述X选自以下值：0.5、1、2、3；对于DMRS类型2，所述X选自以下值：0.5、1、2、3、4.77。
可选地，所述默认值为所述配置值的取值范围中的最大值。
可选地，所述控制信息包括所述配置值。
可选地，所述第一发送功率大于被占用后的所述第二发送功率。
图11是根据一示例性实施例示出的一种终端600的框图，如图11所示，该终端600可以包括：处理器601、接收器602、发射器603、存储器604和总线605。
处理器601包括一个或者一个以上处理核心，处理器601通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器602和发射器603可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器604通过总线605与处理器601相连。
存储器604可用于存储至少一个指令，处理器601用于执行该至少一个指令，以执行本公开实施例提供的信号传输方法中终端所执行的方法。
此外，存储器604可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，静态随时存取存储器(SRAM)，只读存储器(ROM)，磁存储器，快闪存储器，可编程只读存储器(PROM)。
在示例性实施例中，还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现上述各个方法实施例提供的发送DMRS的方法。
图12是根据一示例性实施例示出的一种网络设备700的框图，如图12所 示，网络设备700可以包括：处理器701、接收机702、发射机703和存储器704。接收机702、发射机703和存储器704分别通过总线与处理器701连接。
其中，处理器701包括一个或者一个以上处理核心，处理器701通过运行软件程序以及模块以执行本公开实施例提供的信号传输方法中网络设备所执行的方法。存储器704可用于存储软件程序以及模块。具体的，存储器704可存储操作系统7041、至少一个功能所需的应用程序模块7042。接收机702用于接收其他设备发送的通信数据，发射机703用于向其他设备发送通信数据。
在示例性实施例中，还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现上述各个方法实施例提供接收DMRS的方法。
本公开一示例性实施例还提供了一种通信系统，所述通信系统包括终端和网络设备。所述终端为如图11所示实施例提供的终端。所述网络设备为如图12所示实施例提供的网络设备。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其他实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (25)

  1. 一种发送解调参考信号DMRS的方法，所述方法应用于终端，其特征在于，包括：
    基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS；
    基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。
  2. 根据权利要求1所述的方法，其特征在于，所述控制信息用于指示所述终端在确定所述第一发送功率时占用所述其他频率资源上的第二发送功率。
  3. 根据权利要求1所述的方法，其特征在于，所述控制信息用于指示所述第一符号对应的多个CDM组中的部分CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。
  4. 根据权利要求3所述的方法，其特征在于，所述部分CDM组为一个CDM组。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述第一发送功率占用所述第二发送功率的XdB，其中，X为默认值，或者，X为由所述网络设备配置的配置值。
  6. 根据权利要求5所述的方法，其特征在于，对于DMRS类型1，所述X选自以下值：0.5、1、2、3；对于DMRS类型2，所述X选自以下值：0.5、1、2、3、4.77。
  7. 根据权利要求5所述的方法，其特征在于，所述默认值为所述配置值的取值范围中的最大值。
  8. 根据权利要求5至7任一项所述的方法，其特征在于，所述控制信息包括所述配置值。
  9. 根据权利要求1至8任一项所述的方法，其特征在于，所述方法还包括：
    基于被占用后的所述第二发送功率，在所述其他频率资源上发送数据。
  10. 根据权利要求1至8任一项所述的方法，其特征在于，所述方法还包括：
    在所述其他频率资源上不发送数据。
  11. 根据权利要求1至10任一项所述的方法，其特征在于，所述第一发送功率大于被占用后的所述第二发送功率。
  12. 一种接收DMRS的方法，其特征在于，包括：
    发送控制信息；
    接收来自终端的第一DMRS；
    其中，所述第一DMRS是终端以第一发送功率在所述第一频率资源上发送的，所述第一发送功率是所述终端基于所述控制信息确定的，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。
  13. 根据权利要求12所述的方法，其特征在于，所述控制信息用于指示所述终端在确定所述第一发送功率时占用所述其他频率资源上的第二发送功率。
  14. 根据权利要求12所述的方法，其特征在于，所述控制信息用于指示所述第一符号对应的多个CDM组中的部分CDM组用于发送DMRS，所述第一CDM组属于所述部分CDM组。
  15. 根据权利要求14所述的方法，其特征在于，所述部分CDM组为一个CDM组。
  16. 根据权利要求12至15任一项所述的方法，其特征在于，所述第一发送功率占用所述第二发送功率的XdB，其中，X为默认值，或者，X为由所述网络设备配置的配置值。
  17. 根据权利要求16所述的方法，其特征在于，所述默认值为所述配置值的取值范围中的最大值。
  18. 根据权利要求16所述的方法，其特征在于，对于DMRS类型1，所述X选自以下值：0.5、1、2、3；对于DMRS类型2，所述X选自以下值：0.5、1、2、3、4.77。
  19. 根据权利要求16至18任一项所述的方法，其特征在于，所述控制信息包括所述配置值。
  20. 根据权利要求12至19任一项所述的方法，其特征在于，所述第一发送功率大于被占用后的所述第二发送功率。
  21. 一种发送DMRS的装置，其特征在于，包括：
    确定模块，被配置为基于来自网络设备的控制信息，确定用于在第一频率资源上发送第一DMRS的第一发送功率，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS；
    发送模块，被配置为基于所述第一发送功率，在所述第一频率资源上发送所述第一DMRS。
  22. 一种接收DMRS的装置，其特征在于，包括：
    发送模块，被配置为发送控制信息；
    接收模块，被配置为接收来自终端的第一DMRS；
    其中，所述第一DMRS是终端以第一发送功率在所述第一频率资源上发送的，所述第一发送功率是所述终端基于所述控制信息确定的，所述第一频率资源为第一符号对应的频率资源中与第一CDM组对应的频率资源，所述第一发送功率占用所述第一符号对应的频率资源中除所述第一频率资源之外的其他频率资源上的第二发送功率的至少部分，所述其他频率资源未被用于发送第二DMRS。
  23. 一种终端，其特征在于，包括：
    处理器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为加载并执行所述可执行指令以实现权利要求1至11任一所述的方法。
  24. 一种网络设备，其特征在于，包括：
    处理器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为加载并执行所述可执行指令以实现权利要求12至20任一所述的方法。
  25. 一种计算机可读存储介质，其特征在于，当所述计算机可读存储介质中的指令由处理器执行时，能够执行权利要求1至11任一所述的方法，或者，能够执行权利要求12至20任一项所述的方法。
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