CN108809559B - Communication method and device - Google Patents

Communication method and device Download PDF

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Publication number
CN108809559B
CN108809559B CN201710296586.4A CN201710296586A CN108809559B CN 108809559 B CN108809559 B CN 108809559B CN 201710296586 A CN201710296586 A CN 201710296586A CN 108809559 B CN108809559 B CN 108809559B
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Prior art keywords
uplink
reference signal
uplink transmission
terminal
time domain
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CN108809559A (en
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张长
秦龙
纪刘榴
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201710296586.4A priority Critical patent/CN108809559B/en
Priority to PCT/CN2018/082708 priority patent/WO2018196618A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Abstract

The invention discloses a communication method and a communication device. The method comprises the following steps: a terminal receives indication information from network equipment, wherein the indication information is used for indicating the configuration of uplink transmission; and the terminal determines whether the time domain symbol in which the uplink reference signal is positioned allows carrying data or not according to the indication information, generates an uplink signal to be transmitted, and sends the uplink signal to the network equipment. Therefore, whether the uplink reference signal is allowed to carry data in the time domain symbol in the embodiment of the present invention may be determined by the terminal according to the indication information, so that, compared to the case where the uplink in the LTE system only transmits the uplink reference signal on one time domain symbol according to an agreement, the embodiment of the present invention has stronger flexibility, and thus can better adapt to a single carrier technology or a multi-carrier technology adopted by the uplink.

Description

Communication method and device
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.
Background
In the uplink of a Long Term Evolution (LTE) cellular wireless communication system, a base station transmits an uplink grant to a terminal and indicates Physical resources, including occupied frequency domain resources, that is, Physical Resource Blocks (PRBs), for uplink transmission by the terminal (terminal). And after receiving the uplink authorization, the terminal sends uplink data to the base station on the allocated PRB.
A future evolved communication system, for example, a 5G New Radio (NR) system, will support a New scenario, and may include a Grant-Free (GF) not based on scheduling, in addition to the scheduling-based uplink transmission procedure, where the terminal transmits uplink data on a predefined physical resource. In addition, the terminal may need to transmit an uplink signal such as uplink control information. In order to combat random fading of a radio channel, whether scheduled uplink data transmission or non-scheduled uplink data transmission or uplink control information transmission, when transmitting an uplink signal, it is necessary to insert a reference signal into a predefined physical resource so as to perform channel estimation on the physical resource occupied by the uplink signal. The performance of channel estimation directly affects the data reception performance, and therefore, the design and performance of the reference signal are very important.
The uplink of existing LTE systems supports two types of reference signals: demodulation Reference Signal (DM-RS) and Sounding Reference Signal (SRS). Taking the SRS as an example, since the uplink of the LTE system employs Single carrier Frequency Division Multiple Access (SC-FDMA), the terminal directly maps the SRS to the last symbol in a subframe for transmission according to the time-Frequency resource allocated to the terminal by the base station. However, the uplink of the 5G NR system will support Orthogonal Frequency Division Multiplexing (OFDM) (i.e. multi-carrier technology) and single carrier technology (SC-FDMA), and there is no clear uplink reference signal transmission scheme in the 5G NR system at present.
Disclosure of Invention
The embodiment of the invention provides a communication method and a communication device, which are used for realizing transmission of uplink signals in an uplink.
In a first aspect, an embodiment of the present invention provides a communication method, including:
a terminal receives indication information from network equipment, wherein the indication information is used for indicating the configuration of uplink transmission;
the terminal determines whether the time domain symbol where the uplink reference signal is located allows carrying data or not according to the indication information, and generates an uplink signal to be transmitted;
and the terminal sends the uplink signal to the network equipment.
Therefore, whether the uplink reference signal is allowed to carry data in the time domain symbol in the embodiment of the present invention can be determined by the terminal according to the indication information, so that, compared with the case that the uplink in the LTE system only transmits the uplink reference signal on one time domain symbol according to the convention, the embodiment of the present invention has stronger flexibility, and thus, the present invention can better adapt to the multi-carrier technology and the single carrier technology adopted by the uplink. Moreover, in some scenarios, a scheme that data is allowed to be carried in a time domain symbol where the uplink reference signal is located is adopted, so that time-frequency resources can be effectively utilized; in other scenarios (e.g., coverage limitation), signal distortion can be effectively avoided by adopting a scheme that data is not allowed to be carried in a time domain symbol where the uplink reference signal is located.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the configuration of the uplink transmission indicated by the indication information includes a modulation order of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the modulation order of the uplink transmission is smaller than a first threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the configuration of the uplink transmission indicated by the indication information includes a coding rate of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the coding rate of the uplink transmission is less than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the modulation order of the uplink transmission and the coding rate of the uplink transmission are determined;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the modulation order of the uplink transmission is smaller than a first threshold and the coding rate of the uplink transmission is smaller than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the configuration of the uplink transmission indicated by the indication information includes a transmit power of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the transmitting power of the uplink transmission is greater than a third threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the configuration of the uplink transmission indicated by the indication information includes an uplink reference signal of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located needs to carry data by the terminal includes:
and when the uplink reference signal of the uplink transmission does not support frequency multiplexing with data, the terminal defaults that the time domain symbol in which the uplink reference signal is positioned does not allow data to be carried.
With reference to the first to fifth possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the allowing no data to be carried in the time domain symbol includes:
all frequency domain resources in the time domain symbol for the uplink transmission are occupied by the uplink reference signal; alternatively, the first and second electrodes may be,
and a part of frequency domain resources used for the uplink transmission in the time domain symbol are occupied by the uplink reference signal, and the frequency domain resources not occupied by the uplink reference signal in the time domain symbol are not allowed to carry data.
In other possible implementations, for example, one: the configuration of the uplink transmission may include a waveform of the uplink transmission;
when the waveform of the uplink transmission is a single-carrier waveform (such as an SC-FDMA waveform, also called as a DFT-S-OFDM waveform), the terminal determines that data is not allowed to be carried in a time domain symbol in which the uplink reference signal is located.
For example two: the configuration of the uplink transmission may include a waveform of the uplink transmission and first configuration information, where the first configuration information includes an MCS index value of the uplink transmission and a transmit power of the uplink transmission;
when the waveform of the uplink transmission is a single-carrier waveform and the first configuration information meets a first preset condition, the terminal determines that data is allowed to be carried in a time domain symbol where the uplink reference signal is located; the first configuration information meeting the first preset condition may specifically be: the transmitting power of the uplink transmission is less than a first threshold value and/or the MCS index value of the uplink transmission is greater than or equal to a second threshold value. The first threshold and the second threshold may be set by those skilled in the art according to practical situations and experience, and are not limited in particular.
For example, three: the configuration of the uplink transmission may include a waveform of the uplink transmission and first configuration information, where the first configuration information includes an MCS index value of the uplink transmission and a transmit power of the uplink transmission;
when the uplink transmission waveform is a multi-carrier waveform (such as an OFDM waveform, including a CP-OFDM waveform and the like) and the first configuration information meets a second preset condition, the terminal determines that the time domain symbol where the uplink reference signal is located is not allowed to carry data; the first configuration information meeting the second preset condition may specifically be: the transmitting power of the uplink transmission is larger than or equal to a third threshold value and/or the MCS index value of the uplink transmission is smaller than a fourth threshold value. The third threshold and the fourth threshold may be set by those skilled in the art according to practical situations and experience, and are not limited in particular.
In a second aspect, an embodiment of the present invention provides a communication method, where the method includes:
the network equipment sends configuration information to the terminal, wherein the configuration information is used for indicating whether the time domain symbol in which the uplink reference signal is located allows carrying data or not;
and the network equipment receives the uplink reference signal sent by the terminal.
Therefore, the configuration information sent by the network device to the terminal can indicate whether the time domain symbol in which the uplink reference signal is located is allowed to carry data, so that compared with the case that the uplink in the LTE system only sends the uplink reference signal on one time domain symbol according to the convention, the embodiment of the present invention has stronger flexibility, and can better adapt to a multi-carrier technology and a single carrier technology adopted by the uplink. Moreover, in some scenarios, a scheme that data is allowed to be carried in a time domain symbol where the uplink reference signal is located is adopted, so that time-frequency resources can be effectively utilized; in other scenarios (e.g., coverage limitation), signal distortion can be effectively avoided by adopting a scheme that data is not allowed to be carried in a time domain symbol where the uplink reference signal is located.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the configuration information includes any one or any combination of a modulation order of the uplink transmission, a coding rate of the uplink transmission, and a transmission power of the uplink transmission.
With reference to the second aspect, in a second possible implementation manner of the second aspect, the configuration information includes whether the uplink reference signal supports frequency multiplexing with data;
before the network device sends the configuration information to the terminal, the method further includes:
the network device determines whether the uplink reference signal supports frequency multiplexing with data.
With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the determining, by the network device, whether the uplink reference signal supports frequency multiplexing with data includes:
and when the power margin of the terminal is less than a fourth threshold, the network equipment determines that the uplink reference signal does not support frequency multiplexing with data.
With reference to the second possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the determining, by the network device, whether the uplink reference signal supports frequency multiplexing with data includes:
and when the signal to interference plus noise ratio (SINR) of the terminal is smaller than a fifth threshold, the network equipment determines that the uplink reference signal of the uplink transmission does not support frequency multiplexing with data.
In other possible implementation manners, for example, when the power headroom of the terminal is less than a fourth threshold and the signal to interference plus noise ratio SINR of the terminal is less than a fifth threshold, the network device determines that the uplink reference signal does not support frequency multiplexing with data.
In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes: a transmitter, a receiver, and a processor;
the receiver is configured to receive indication information from a network device, where the indication information is used to indicate configuration of uplink transmission;
the processor is configured to determine whether the time domain symbol in which the uplink reference signal is located is allowed to carry data according to the indication information, and generate an uplink signal to be transmitted;
the transmitter is configured to transmit the uplink signal to the network device.
With reference to the third aspect, in a first possible implementation manner of the third aspect, the configuration of the uplink transmission indicated by the indication information includes a modulation order of the uplink transmission;
the processor is specifically configured to:
and when the modulation order of the uplink transmission is smaller than a first threshold, determining that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the third aspect, in a second possible implementation manner of the third aspect, the configuration of the uplink transmission indicated by the indication information includes a coding rate of the uplink transmission;
the processor is specifically configured to:
and when the coding rate of the uplink transmission is less than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the modulation order of the uplink transmission and the coding rate of the uplink transmission are determined;
the processor is specifically configured to:
and when the modulation order of the uplink transmission is smaller than a first threshold and the coding rate of the uplink transmission is smaller than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the configuration of the uplink transmission indicated by the indication information includes a transmission power of the uplink transmission;
the processor is specifically configured to:
and when the transmitting power of the uplink transmission is greater than a third threshold, determining that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
With reference to the third aspect, in a fifth possible implementation manner of the third aspect, the configuration of uplink transmission indicated by the indication information includes an uplink reference signal of the uplink transmission;
the processor is specifically configured to:
and when the uplink reference signal of the uplink transmission does not support frequency multiplexing with data, defaulting that the time domain symbol in which the uplink reference signal is positioned does not allow data to be carried.
With reference to the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the allowing no data to be carried in the time domain symbol includes:
all frequency domain resources in the time domain symbol for the uplink transmission are occupied by the uplink reference signal; alternatively, the first and second electrodes may be,
and a part of frequency domain resources used for the uplink transmission in the time domain symbol are occupied by the uplink reference signal, and the frequency domain resources not occupied by the uplink reference signal in the time domain symbol are not allowed to carry data.
In a fourth aspect, an embodiment of the present invention provides a network device, where the network device includes: a transmitter, a receiver, and a processor; the processor performs, in conjunction with the transmitter and the receiver:
sending configuration information to a terminal, wherein the configuration information is used for indicating whether the time domain symbol in which the uplink reference signal is located allows carrying data;
and receiving the uplink signal sent by the terminal.
With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the configuration information includes any one or any combination of a modulation order of the uplink transmission, a coding rate of the uplink transmission, and a transmission power of the uplink transmission.
With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the configuration information includes whether the uplink reference signal supports frequency multiplexing with data;
the processor is further configured to, prior to the transmitter transmitting the configuration information:
determining whether the uplink reference signal supports frequency multiplexing with data.
With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the processor is specifically configured to:
and when the power margin of the terminal is less than a fourth threshold, determining that the uplink reference signal of the uplink transmission does not support frequency multiplexing with data.
With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the processor is specifically configured to:
and when the signal to interference plus noise ratio (SINR) of the terminal is smaller than a fifth threshold, determining that the uplink reference signal of the uplink transmission does not support frequency multiplexing with data.
In a fifth aspect, an embodiment of the present invention further provides an apparatus, where the apparatus includes various functional modules, such as a sending module, a receiving module, and a processing module, for performing the above method steps. The apparatus may be a terminal, a network device, etc.
In a sixth aspect, an embodiment of the present invention further provides an apparatus, where the apparatus includes a processor and a memory, where the memory is used to store a software program, and the processor is used to read the software program stored in the memory and implement the communication method provided by any one of the above designs. The apparatus may be a terminal, a network device, etc.
In a seventh aspect, an embodiment of the present invention further provides a computer storage medium, where a software program is stored, and when the software program is read and executed by one or more processors, the software program can implement the communication method provided by any one of the designs.
In an eighth aspect, embodiments of the present invention further provide a computer program product containing instructions, which when run on a computer, cause the computer to perform any one of the communication methods provided by the above-mentioned designs.
In the embodiment of the invention, a terminal receives indication information from network equipment, wherein the indication information is used for indicating the configuration of uplink transmission; and the terminal determines whether the time domain symbol in which the uplink reference signal is positioned allows carrying data or not according to the indication information, generates an uplink signal to be transmitted, and sends the uplink signal to the network equipment. Therefore, whether the uplink reference signal is allowed to carry data in the time domain symbol in the embodiment of the present invention can be determined by the terminal according to the indication information, so that, compared with the case that the uplink in the LTE system only transmits the uplink reference signal on one time domain symbol according to the convention, the embodiment of the present invention has stronger flexibility, and thus, the present invention can better adapt to the multi-carrier technology and the single carrier technology adopted by the uplink. Moreover, in some scenarios, a scheme that data is allowed to be carried in a time domain symbol where the uplink reference signal is located is adopted, so that time-frequency resources can be effectively utilized; in other scenarios (e.g., coverage limitation), signal distortion can be effectively avoided by adopting a scheme that data is not allowed to be carried in a time domain symbol where the uplink reference signal is located.
Drawings
FIG. 1 is a diagram illustrating a system architecture suitable for use with an embodiment of the present invention;
fig. 2 is a flowchart illustrating a corresponding process of a method for sending an uplink reference signal according to a first embodiment of the present invention;
fig. 3a is a schematic diagram of time-frequency resources occupied by uplink reference signals;
fig. 3b is a schematic diagram of a time-frequency resource when uplink reference signals and data signals are multiplexed on the same symbol;
fig. 3c is a schematic diagram of a time-frequency resource when uplink reference signals and data signals are not multiplexed on the same symbol;
fig. 3d and fig. 3e are schematic diagrams of another two time-frequency resources when uplink reference signals and data signals are not multiplexed on the same symbol;
fig. 4 is a flowchart illustrating a method for sending an uplink reference signal according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings attached hereto.
The method for sending the uplink reference signal in the embodiment of the invention can be applied to various system architectures. Fig. 1 is a schematic diagram of a system architecture applicable to the embodiment of the present invention. As shown in fig. 1, the system architecture includes a network device 101, one or more terminals, such as a first terminal 1021, a second terminal 1022, and a third terminal 1023 shown in fig. 1. The network device 101 may perform information transmission with the first terminal 1021, the second terminal 1022, and the third terminal 1023 through a network, and specifically, the first terminal 1021, the second terminal 1022, and the third terminal 1023 may send uplink reference signals to the network device 101.
In the embodiment of the present invention, the network device may be a base station device (BS). A base station apparatus, which may also be referred to as a base station, is a device deployed in a radio access network to provide wireless communication functions. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS) and a Base Station Controller (BSC), a device providing a base station function in a 3G network includes a node B (NodeB) and a Radio Network Controller (RNC), a device providing a base station function in a 4G network includes an evolved node B (eNB), and a device providing a base station function in a 5G NR network includes a new wireless node B, a Central Unit (CU), a Distributed Unit (Distributed Unit), and a new wireless controller, and in a WLAN, the device providing a base station function is an Access Point (AP).
The terminals may be devices (devices) that provide voice and/or data connectivity to users, including wired terminals and wireless terminals. The wireless terminal may be a handheld device having wireless connection capabilities, or other processing device connected to a wireless modem, a mobile terminal communicating with one or more core networks via a radio access network. For example, the wireless terminal may be a mobile phone, a computer, a tablet computer, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable device, an electronic book reader (e-book reader), and the like. As another example, a wireless terminal may be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device. As another example, a wireless terminal may be a mobile station (mobile station), an access point (access point), or a part of a User Equipment (UE).
The communication system to which the above system architecture is applicable includes but is not limited to: code Division Multiple Access (CDMA) IS-95, Code Division Multiple Access (CDMA) 2000, Time Division Synchronous Code Division Multiple Access (TD-SCDMA), Wideband Code Division Multiple Access (WCDMA), Time Division duplex Long Term Evolution (TDD LTE), Frequency Division duplex Long Term Evolution (FDD), Long Term Evolution-enhancement (Long Term Evolution-Advanced, LTE-Advanced), and various wireless communication systems for future Evolution (e.g., 5G NR system).
Taking the 5G NR system as an example, the uplink of the 5G NR system may support both a multi-carrier technique and a single-carrier technique, and in particular, the uplink transmission may use OFDM waveforms (including Cyclic prefix-orthogonal frequency Division Multiplexing (CP-OFDM) waveforms) and Discrete Fourier Transform (DFT) spread-based orthogonal frequency Division Multiplexing (DFT-spread OFDM, DFT-S-OFDM) waveforms (which may also be referred to as SC-FDMA), in the case of coexistence of two waveforms, one possible implementation way of transmitting the uplink reference signal is to directly transmit the reference signal in the LTE uplink transmission reference signal in the prior art, however, because the uplink of the LTE system only transmits the uplink reference signal on one time domain symbol according to the convention, the transmission mode is too single, which may cause the waste of partial time frequency resources.
Considering that the uplink in the 5G NR system adopts CP-OFDM, a more flexible resource mapping manner may be adopted, and therefore, another possible implementation manner for sending the uplink reference signal is to multiplex the reference signal and the data signal on the same time domain symbol, that is, a frequency division multiplexing manner, so as to effectively improve resource utilization rate, where the data signal may be information carried on an uplink shared channel (PUSCH) and an uplink control channel (PUCCH). However, since the uplink in the 5G NR system can also adopt the SC-FDMA waveform, the SC-FDMA waveform has a lower Peak to Average Power Ratio (PAPR) than the CP-OFDM. On the symbol where the reference signal and the PUSCH coexist, the PAPR of the symbol is improved, so that the power amplifier enters a nonlinear working area on the symbol containing the reference signal, signal distortion is caused, and inaccurate channel estimation and data receiving are caused.
Based on this, an embodiment of the present invention provides a communication method, specifically, a terminal receives indication information for indicating configuration of uplink transmission from a network device, and determines whether a time domain symbol in which an uplink reference signal is located is allowed to carry data according to the indication information, so as to generate an uplink signal to be transmitted and send the uplink signal to the network device. Therefore, whether the uplink reference signal is allowed to carry data in the time domain symbol in the embodiment of the present invention can be determined by the terminal according to the indication information, so that, compared with the case that the uplink in the LTE system only transmits the uplink reference signal on one time domain symbol according to the convention, the embodiment of the present invention has stronger flexibility, and thus, the present invention can better adapt to the multi-carrier technology and the single carrier technology adopted by the uplink. Moreover, in some scenarios, a scheme that data is allowed to be carried in a time domain symbol where the uplink reference signal is located is adopted, so that time-frequency resources can be effectively utilized; in other scenarios (e.g., coverage limitation), signal distortion can be effectively avoided by adopting a scheme that data is not allowed to be carried in a time domain symbol where the uplink reference signal is located.
It should be noted that, in the embodiment of the present invention, whether to allow bearer data in the time domain symbol where the uplink reference signal is located may be determined by the terminal according to the indication information sent by the network device, specifically, the network device may indicate the terminal in an explicit or implicit manner. The explicit method is that the network device determines whether an uplink reference signal for uplink transmission supports frequency multiplexing with data, and in this case, the configuration of uplink transmission indicated by the indication information sent by the network device includes the uplink reference signal for uplink transmission; the implicit method is that after the network device configures the relevant information (for example, the waveform of the uplink transmission, the transmission power of the uplink transmission, the modulation order of the uplink transmission, the coding rate of the uplink transmission, etc.) of the terminal, the relevant information is sent to the terminal, and the terminal determines whether the uplink reference signal of the uplink transmission allows carrying data according to the relevant information. Each will be described in detail below.
The first embodiment is as follows: implicit mode
Fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present invention, as shown in fig. 2, the method includes:
step 201, a network device sends indication information to a terminal, wherein the indication information is used for indicating the configuration of uplink transmission;
it should be noted that, in the embodiment of the present invention, the indication information may include configuration information, where the configuration information is used to indicate whether the time domain symbol where the uplink reference signal is located is allowed to carry data. Specifically, the configuration information may include at least one of a waveform of the uplink transmission, a transmission power of the uplink transmission, and a modulation order of the uplink transmission.
In this embodiment of the present invention, a network device may send indication Information in multiple ways, and for example, the configuration of uplink transmission indicated by the indication Information includes at least one of a waveform of uplink transmission, a transmission power of uplink transmission, and a modulation order of uplink transmission, the network device may indicate at least one of a waveform of uplink transmission, a transmission power of uplink transmission, a modulation order of uplink transmission, and a coding rate of uplink transmission in Downlink Control Information (DCI) through physical layer signaling; or, the network device may also configure at least one of a waveform of uplink transmission, a modulation order of uplink transmission, and a coding rate of uplink transmission through a higher layer signaling (e.g., Radio Resource Control (RRC) signaling); or, the network device may also configure, through high-layer signaling, a waveform of the uplink transmission and multiple candidates of the transmission power of the uplink transmission, and dynamically instruct, through the DCI, which of the multiple candidates the terminal uses.
Step 202, the terminal receives the indication information, determines whether the time domain symbol where the uplink reference signal is located is allowed to carry data according to the indication information, and generates an uplink signal to be transmitted.
Specifically, since the configuration of the uplink transmission indicated by the indication information may include at least one of a waveform of the uplink transmission, a transmission power of the uplink transmission, a modulation order of the uplink transmission, and a coding rate of the uplink transmission, the terminal may determine whether to allow data to be carried in the time domain symbol in which the uplink reference signal is located according to at least one of the waveform of the uplink transmission, the transmission power of the uplink transmission, the modulation order of the uplink transmission, and the coding rate of the uplink transmission. For example, when the modulation order of the uplink transmission is smaller than a first threshold, the terminal determines that data is not allowed to be carried in a time domain symbol in which the uplink reference signal is located; or, when the coding rate of the uplink transmission is less than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data; or, when the modulation order of the uplink transmission is smaller than a first threshold and the coding rate of the uplink transmission is smaller than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data; or, when the transmission power of the uplink transmission is greater than a third threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data. The values of the first threshold, the second threshold and the third threshold may be predetermined, or may be sent to the terminal by the network device.
Several possible implementations are specifically listed below:
the first method is as follows: the terminal determines whether the time domain symbol in which the uplink reference signal is located is allowed to carry data according to the waveform of uplink transmission
In a 5G NR system, uplink transmissions may support SC-FDMA waveforms and OFDM waveforms. In the embodiment of the present invention, considering that the SC-FDMA waveform has a lower PAPR than the OFDM waveform, the SC-FDMA waveform is more suitable for use in a scenario with a low Signal to interference and noise (SINR), such as a coverage limited scenario. In such a scenario, generally higher transmission power is required, and a power amplifier also needs higher efficiency, so that if a data signal is transmitted in a time domain symbol in which an uplink reference signal is located, PAPR may be significantly increased, based on which, when uplink transmission is configured as an OFDM waveform, data is allowed to be carried in the time domain symbol in which the uplink reference signal is located, and when uplink transmission is configured as an SC-FDMA waveform, data is not allowed to be carried in the time domain symbol in which the uplink reference signal is located.
In specific implementation, the terminal may store a correspondence table of waveforms and labels (used to indicate whether to allow data to be carried in a time domain symbol where the uplink reference signal is located, for example, label 1 indicates that data is allowed to be carried, and label 0 indicates that data is not allowed to be carried), as shown in table 1, an OFDM waveform corresponds to label 1, and an SC-FDMA waveform corresponds to label 0; if the terminal determines that the uplink transmission waveform indicated by the indication information is an OFDM waveform, determining that the uplink reference signal is allowed to carry data in the time domain symbol; if the terminal determines that the uplink transmission waveform indicated by the indication information is an SC-FDMA waveform, it may be determined that the data is not allowed to be carried in the time domain symbol in which the uplink reference signal is located.
Table 1: waveform and label corresponding relation table
Wave form Label (R)
OFDM waveform Label 1
SC-FDMA waveform Label 0
The second method comprises the following steps: the terminal determines whether the time domain symbol in which the uplink reference signal is located is allowed to carry data according to the transmitting power of the uplink transmission
In the embodiment of the invention, the power amplifier is directly influenced by the PAPR, so that the feasibility of determining whether the data is allowed to be carried in the time domain symbol in which the uplink reference signal is positioned according to the transmitted power of the uplink reference signal is high. The terminal may set a threshold a, if the transmission power of the uplink transmission indicated by the indication information is greater than or equal to the threshold a, the terminal may determine that the time domain symbol in which the uplink reference signal is located is not allowed to carry data, and if the transmission power of the uplink transmission indicated by the indication information is less than the threshold a, the terminal may determine that the time domain symbol in which the uplink reference signal is located is allowed to carry data. In specific implementation, a correspondence table between the transmission power and the tag (used for indicating whether to allow data to be carried in the time domain symbol where the uplink reference signal is located, for example, tag 1 indicates that data is allowed to be carried, and tag 0 indicates that data is not allowed to be carried) may be stored in the terminal, as shown in table 2, the transmission power of the terminal is greater than or equal to the threshold a, corresponds to tag 0, and is less than the threshold a, and corresponds to tag 1.
Table 2: transmitting power and configuration information corresponding relation table
Transmitting power Configuration information
The transmitting power is more than or equal to A Label 0
Transmitting power<A Label 1
The third method comprises the following steps: the terminal determines whether the time domain symbol in which the uplink reference signal is located is allowed to carry data according to the modulation order and/or the coding rate of the uplink transmission
Considering that the Modulation order and the code rate of uplink transmission can be generally and uniformly indicated by a Modulation and Modulation scheme (MCS) index value, the following description takes an example that the terminal determines whether to allow data to be carried in a time domain symbol in which the uplink reference signal is located according to the MCS index value.
In scenarios such as coverage limitation, higher transmit power is required and PAPR is more sensitive. In these scenarios, for an Adaptive Modulation and Coding (Adaptive Modulation and Coding) mechanism, network equipment usually configures a lower code rate and a lower Modulation mode for a terminal, so that it can be known whether MCS and PAPR are sensitive or not to have a certain correspondence. Therefore, the terminal may set a threshold B of an MCS index value (index), and if the MCS index value of the last transmission indicated by the indication information is greater than or equal to the threshold B, the terminal may determine that the uplink reference signal is allowed to carry data in the time domain symbol, and if the MCS index value of the uplink transmission indicated by the indication information is smaller than the threshold B, the terminal may determine that the uplink reference signal is not allowed to carry data in the time domain symbol. Taking LTE as an example, the MCS includes 32(0-31) possible index values, and then the threshold B may be set to 5, and accordingly, when the MCS index value is 0-4, the MCS index value corresponds to tag 0 (no data is allowed to be carried in the time domain symbol where the uplink reference signal is located), and when the MCS index value is 5-31, the MCS index value corresponds to tag 1 (data is allowed to be carried in the time domain symbol where the uplink reference signal is located), as shown in table 3.
Table 3: MCS index value and label corresponding relation table
MCS index value Label (R)
0-4 Label 0
5-31 Label 1
In the embodiment of the present invention, the threshold B may be predefined, or may be broadcasted in the system by a system message, etc. to notify the terminal, or may be configured by a higher layer signaling, such as an RRC signaling, to notify the terminal.
The method is as follows: the terminal determines whether the time domain symbol in which the uplink reference signal is positioned is allowed to carry data according to any combination of the waveform of the uplink transmission, the transmitting power of the uplink transmission, the modulation order and the coding rate of the uplink transmission
In the embodiment of the present invention, as described above, the waveform of the uplink transmission, the transmission power of the uplink transmission, and the MCS index value of the uplink transmission may all be used as a determination factor for determining whether to allow data to be carried in the time domain symbol in which the uplink reference signal is located, so that the terminal may also determine whether to allow data to be carried in the time domain symbol in which the uplink reference signal is located according to any combination of the three. For example, the terminal determines whether to allow data to be carried in the time domain symbol in which the uplink reference signal is located according to a combination of the three, in this case, the configuration of the uplink transmission indicated by the indication information includes the three, specifically, the waveform of the uplink transmission may be set to be an SC-FDMA waveform, when the MCS index value is smaller than the threshold B and the transmission power is greater than or equal to the threshold a, the time domain symbol in which the uplink reference signal is located is not allowed to carry data, and in other cases, the time domain symbol in which the uplink reference signal is located is allowed to carry data.
With respect to the above-described modes one to four, and the like, an example will be specifically described below.
In step 201, the configuration of the uplink transmission indicated by the indication information includes a waveform of the uplink transmission and first configuration information, where the first configuration information includes a transmission power of the uplink transmission and/or an MCS index value of the uplink transmission, and accordingly, in step 202, the terminal may determine whether to allow data to be carried in a time domain symbol where the uplink reference signal is located according to the waveform of the uplink transmission and the first configuration information.
In an implementation manner in this example, if the terminal determines that the uplink transmission waveform indicated by the indication information is an SC-FDMA waveform and the first configuration information meets the first preset condition, it determines that the time domain symbol in which the uplink reference signal is located is allowed to carry data, otherwise, it determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data. The first configuration information meeting the first preset condition may specifically be: the transmitting power of the uplink transmission is less than a first threshold value and/or the MCS index value of the uplink transmission is greater than or equal to a second threshold value. The first threshold and the second threshold may be set by those skilled in the art according to practical situations and experience, and are not limited in particular.
By adopting the mode, aiming at the SC-FDMA waveform, if the first configuration information meets the first preset condition, the uplink reference signal is allowed to bear data in the time domain symbol, namely the uplink reference signal and the data signal can be multiplexed on the same time domain symbol.
Another implementation manner in this example is that the terminal determines that the waveform used by the terminal is an OFDM waveform, and the first configuration information meets the second preset condition, it is determined that the time domain symbol in which the uplink reference signal is located is not allowed to carry data, otherwise, it is determined that the time domain symbol in which the uplink reference signal is located is allowed to carry data. The first configuration information meeting the second preset condition may specifically be: the transmitting power of the uplink transmission is larger than or equal to a third threshold value and/or the MCS index value of the uplink transmission is smaller than a fourth threshold value. The third threshold and the fourth threshold may be set by those skilled in the art according to practical situations and experience, and are not limited in particular.
By adopting the mode, aiming at the OFDM waveform, if the first configuration information meets the second preset condition, the time domain symbol where the uplink reference signal is located is not allowed to carry data, namely the uplink reference signal and the data signal are not multiplexed on the same time domain symbol.
According to the example, it can be seen that, in the embodiment of the present invention, different scenarios are finely divided, and based on the divided scenarios, whether the time domain symbol in which the uplink reference signal is located is allowed to carry data is determined, so that a highly feasible implementation scheme is provided for sending the uplink reference signal in the multi-carrier technology.
Step 203, the terminal sends an uplink signal to the network device.
In specific implementation, as shown in fig. 3a, the time domain symbols occupied by the uplink reference signal are symbol 2, symbol 5, symbol 9, and symbol 12, for an example, the terminal may divide REs on the frequency domain resource into 3 groups, that is, an RE numbered 1 is a first RE group, an RE numbered 2 is a second RE group, and an RE numbered 3 is a third RE group. At this time, two adjacent REs in any RE group are spaced by 2 REs. In this embodiment of the present invention, the configuration information of the uplink reference signal may further include the number of RE groups occupied by the uplink reference signal, and the terminal may generate P groups of reference signals according to the number (e.g., P) of the RE groups occupied by the uplink reference signal, and map the P groups of reference signals to REs in any P RE groups of the three RE groups respectively for transmission, where a value of P may be 1, 2, or 3.
Further, in order to ensure the low PAPR characteristic, a preset constraint condition may be satisfied between the P groups of reference signals, where the preset constraint condition may be that the P groups of reference signals are generated based on the same ZC sequence.
For one uplink transmission of the terminal, the generation sequence of the uplink reference signal is the same under the two conditions of multiplexing and not multiplexing. A scheme for generating uplink reference signals based on the same ZC sequence is given as follows: when multiplexing, the time domain expression of the ZC sequence for generating the uplink reference signal is assumed to be xj(t), wherein j is the group number of the uplink reference signals during multiplexing, and t is a time domain sampling point; then when not multiplexing, the time domain expression of the ZC sequence generating the ith group of uplink reference signals is xi(t)＝Cixj(t)e-(j-i)θIn which C isiAnd theta is a constant.
Therefore, because the downlink reference signals in the LTE system are generated based on the full bandwidth, and the ZC sequence for generating the reference signals is also generated based on the number of REs occupied by the full bandwidth reference signals, when the reference signals occupy part of the bandwidth for transmission, the good cross-correlation characteristics of the reference signals between the terminals cannot be satisfied.
For example, the terminal 1 occupies the first RE packet in the symbol 2 to transmit the uplink reference signal, and the terminal 2 occupies the first RE packet and the second RE packet in the symbol 2 to transmit the uplink reference signal, at this time, since the uplink reference signals of the terminal 2 on the first RE packet and the second RE packet are generated based on the same ZC sequence, and the uplink reference signal of the terminal 1 on the first RE packet is also generated based on the ZC sequence, the uplink reference signal of the terminal 1 on the first RE packet and the uplink reference signal of the terminal 2 on the first RE packet have good cross-correlation characteristics, and mutual interference is effectively avoided.
In the embodiment of the present invention, fig. 3b is a schematic diagram of a time-frequency resource when an uplink reference signal and a data signal are multiplexed on the same symbol. As shown in fig. 3b, REs except for REs occupied by the reference signal on the first time domain symbol occupied by the uplink reference signal are REs occupied by the data signal.
Fig. 3c is a schematic diagram of a time-frequency resource when the reference signal and the data signal are not multiplexed on the same symbol. As shown in fig. 3c, REs except for REs occupied by the reference signal on the second time domain symbol occupied by the uplink reference signal are blank REs.
It should be noted that, in the above fig. 3b and fig. 3c, the two cases where the reference signal and the data signal are multiplexed on the same symbol and the reference signal and the data signal are not multiplexed on the same symbol are exemplified by the same pattern (pattern) of the reference signal, and at this time, the transmission power of the reference signal on the RE may be different between the two cases, that is, the transmission power of the reference signal on the RE in the case shown in fig. 3b is smaller than the transmission power of the reference signal on the RE in the case shown in fig. 3 c.
In the embodiment of the present invention, the patterns of the reference signal may be different in two cases where the reference signal and the data signal are multiplexed on the same symbol and where the reference signal and the data signal are not multiplexed on the same symbol. In the following, taking the case that the reference signal and the data signal are not multiplexed on the same symbol as an example, several possible reference signal patterns are listed, as shown in fig. 3d and fig. 3e, respectively. Accordingly, in the case that the reference signal and the data signal are multiplexed on the same symbol, the reference signal may also adopt the pattern shown in fig. 3d, and is not limited in particular. For example, the reference signal and the data signal may be multiplexed on the same symbol in the manner shown in fig. 3b, and the reference signal and the data signal may be not multiplexed on the same symbol in the manner shown in fig. 3d or fig. 3 e.
Step 204, the network device receives the uplink signal sent by the terminal, and may perform channel estimation, demodulation, and the like according to the configuration.
It should be noted that: (1) the time domain symbol in the embodiment of the present invention may be an OFDM symbol, or may also be an SC-FDMA symbol. (2) The time domain symbol where the uplink reference signal is located may be predetermined by the terminal and the network device, and in this case, the terminal may determine the time domain symbol where the uplink reference signal is located according to the predetermined convention.
Example two: display mode
Fig. 4 is a flowchart illustrating a communication method according to a second embodiment of the present invention, and as shown in fig. 4, the method includes:
step 401, the network device obtains the power headroom of the terminal and/or the SINR of the terminal.
Step 402, the network device determines whether the uplink reference signal of uplink transmission supports frequency multiplexing with data according to the power headroom and/or the SINR of the terminal. For example, when the power headroom of the terminal is less than a fourth threshold, the network device determines that the uplink reference signal does not support frequency multiplexing with data; or, when the SINR of the terminal is less than a fifth threshold, the network device determines that the uplink reference signal for uplink transmission does not support frequency multiplexing with data.
Several possible implementations are specifically listed below:
in the first mode, if the network device determines that the power headroom of the terminal is greater than or equal to a fifth threshold and/or the SINR of the terminal is greater than or equal to a sixth threshold, it determines that the uplink reference signal for uplink transmission supports frequency multiplexing with data, and otherwise, it determines that the uplink reference signal for uplink transmission does not support frequency multiplexing with data.
In an example of this implementation, the network device may determine whether the uplink reference signal for uplink transmission supports frequency multiplexing with data according to the power headroom reported by the terminal. For example, the network device may set an offset value, for example, 2dB, for a power margin when the uplink reference signal and the data signal are multiplexed on the same symbol, and if the power margin reported by the terminal is 6dB, the network device calculates that the power margin when the reference signal and the data signal are multiplexed on the same symbol is 6dB-2dB — 4dB, and determines whether the reference signal transmitted by the terminal in the uplink is multiplexed with the data signal on the same symbol according to the corrected power margin of 4 dB; for example, a threshold D (a fifth threshold) may be set, and if the power headroom reported by the terminal is greater than or equal to the threshold D, it is determined that the uplink reference signal for uplink transmission supports frequency multiplexing with data, and if the power headroom reported by the terminal is less than the threshold D, it is determined that the uplink reference signal for uplink transmission does not support frequency multiplexing with data. The specific value of the threshold D can be set according to actual conditions.
In example two of the implementation manners, the network device calculates an uplink SINR according to the SRS of the terminal, and determines whether an uplink reference signal for uplink transmission supports frequency multiplexing with data according to the measured SINR. For example, a threshold E (sixth threshold) may be set, and if the SINR is less than the threshold E, it is determined that the uplink reference signal for uplink transmission does not support frequency multiplexing with data, and if the SINR is greater than or equal to the threshold E, it is determined that the uplink reference signal for uplink transmission supports frequency multiplexing with data. The specific value of the threshold E can be set according to actual conditions.
In example three of this implementation, the network device determines whether the uplink reference signal for uplink transmission supports frequency multiplexing with data, by comprehensively considering the power headroom and the SINR. Specifically, when the power headroom is greater than or equal to the fifth threshold and the SINR is greater than or equal to the sixth threshold, the uplink reference signal for uplink transmission supports frequency multiplexing with data, otherwise, the uplink reference signal for uplink transmission does not support frequency multiplexing with data.
In the second mode, if the network device determines that the power headroom of the terminal is less than the seventh threshold and/or the SINR of the terminal is less than the eighth threshold, the uplink reference signal for uplink transmission does not support frequency multiplexing with the data, otherwise, the network device determines that the uplink reference signal for uplink transmission supports frequency multiplexing with the data. The details can be similar to the above implementation and are not described herein.
It should be noted that, in step 401 and step 402, the above is only one possible example that the network device determines whether the uplink reference signal for uplink transmission supports frequency multiplexing with data, and whether the uplink reference signal supports frequency multiplexing with data may also be predetermined by a protocol, which is not limited specifically.
Step 403, the network device sends configuration information to the terminal, where the configuration information includes whether the uplink reference signal supports frequency multiplexing with data.
In the embodiment of the present invention, the network device may send the indication information in multiple ways, for example, the network device may indicate the uplink reference signal in the DCI through physical layer signaling, or may indicate the uplink reference signal through high layer signaling, or indicate multiple candidates of the uplink reference signal through high layer signaling, and dynamically indicate which of the multiple candidates is used by the terminal through the DCI. Specific ways of dynamically indicating through DCI include, but are not limited to, the following: firstly, adding a specific domain indication uplink reference signal in the DCI, for example, adding a 1-bit reference signal indication domain, where bit 1 indicates that the data signal and the reference signal can multiplex the same time domain symbol, and bit 0 indicates that the data signal and the reference signal cannot multiplex the same time domain symbol. Secondly, configuration information of a specific domain indication uplink reference signal is not added in the DCI, and the configuration information is distinguished by a scrambling code sequence. If after the DCI is coded, the scrambling sequence A is adopted for scrambling, which means that the data signal can multiplex the same time domain symbol with the reference signal, and the scrambling sequence B is adopted for scrambling, which means that the data signal can not multiplex the same time domain symbol with the reference signal. When the terminal detects the DCI, whether the uplink reference signal supports frequency multiplexing with data is determined according to the scrambling code sequence used when the DCI is detected.
Step 404, a terminal receives configuration information sent by a network device, and if an uplink reference signal does not support frequency multiplexing with data, the terminal can default that the time domain symbol in which the uplink reference signal is located does not allow data to be carried; if the uplink reference signal supports frequency multiplexing with data, the terminal may default to allow data to be carried in a time domain symbol where the uplink reference signal is located.
It should be noted that, if the uplink reference signal supports frequency multiplexing with data, the terminal defaults that the time domain symbol in which the uplink reference signal is located allows to carry data, but whether data is carried in the time domain symbol in which the actually generated uplink reference signal is located depends on whether there is data to be transmitted.
Step 405, the terminal sends an uplink signal to the network device.
In step 406, the network device receives the uplink signal sent by the terminal, and may perform channel estimation, demodulation, and the like according to the configuration.
Other contents, such as the pattern of the reference signal, in the second embodiment can refer to the description in the first embodiment, and are not repeated herein.
For the above method flow, embodiments of the present invention further provide a terminal and a network device, and the specific content of the terminal and the network device may be implemented with reference to the above method.
Fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in fig. 5, the terminal 500 includes: a transmitter 501a, a receiver 501b, a processor 502, a memory 503, and a bus system 504;
the memory 503 is used for storing programs. In particular, the program may include program code including computer operating instructions. The memory 503 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as at least one disk memory. Only one memory is shown in the figure, but of course, the memory may be provided in plural numbers as necessary. The memory 503 may also be memory in the processor 502.
The memory 503 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
and (3) operating instructions: including various operational instructions for performing various operations.
Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.
Processor 502 controls the operation of terminal 500, and processor 502 may also be referred to as a CPU (Central Processing Unit). In a particular application, the various components of the terminal 500 are coupled together by a bus system 504, wherein the bus system 504 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 504. For ease of illustration, it is only schematically drawn in fig. 5.
The method disclosed in the embodiments of the present application may be applied to the processor 502 or implemented by the processor 502. The processor 502 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 502. The processor 502 described above may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 503, and the processor 502 reads the information in the memory 503 and performs the method steps performed by the above terminal in combination with its hardware.
Fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in fig. 6, the network device 600 includes: a transmitter 601a, a receiver 601b, a processor 602, a memory 603, and a bus system 604;
the memory 603 is used for storing programs. In particular, the program may include program code including computer operating instructions. The memory 603 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as at least one disk memory. Only one memory is shown in the figure, but of course, the memory may be provided in plural numbers as necessary. The memory 603 may also be memory in the processor 602.
Memory 603 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
and (3) operating instructions: including various operational instructions for performing various operations.
Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.
Processor 602 controls the operation of network device 600, and processor 602 may also be referred to as a CPU (Central Processing Unit). In particular implementations, the various components of network device 600 are coupled together by a bus system 604, where bus system 604 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 604. For ease of illustration, it is only schematically drawn in fig. 6.
The methods disclosed in the embodiments of the present application may be applied to the processor 602, or implemented by the processor 602. The processor 602 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 602. The processor 602 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 603, and the processor 602 reads the information in the memory 603 and performs the method steps performed by the above network device in conjunction with its hardware.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims (16)

1. A method of communication, comprising:
a terminal receives indication information from network equipment, wherein the indication information is used for indicating the configuration of uplink transmission;
the terminal determines whether the time domain symbol where the uplink reference signal is located allows carrying data or not according to the indication information, and generates an uplink signal to be transmitted;
the terminal sends the uplink signal to the network equipment;
the configuration of the uplink transmission indicated by the indication information includes at least one of a modulation order of the uplink transmission, a coding rate of the uplink transmission, and a transmission power of the uplink transmission.
2. The method of claim 1, wherein:
the configuration of the uplink transmission indicated by the indication information comprises a modulation order of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the modulation order of the uplink transmission is smaller than a first threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
3. The method of claim 1, wherein:
the configuration of the uplink transmission indicated by the indication information comprises a coding rate of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the coding rate of the uplink transmission is less than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
4. The method of claim 1, wherein:
the configuration of the uplink transmission indicated by the indication information comprises a modulation order of the uplink transmission and a coding rate of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the modulation order of the uplink transmission is smaller than a first threshold and the coding rate of the uplink transmission is smaller than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
5. The method of claim 1, wherein:
the configuration of the uplink transmission indicated by the indication information comprises the transmitting power of the uplink transmission;
the method for determining whether the time domain symbol in which the uplink reference signal is located is allowed to carry data by the terminal includes:
and when the transmitting power of the uplink transmission is greater than a third threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
6. The method according to any one of claims 2 to 5, wherein:
the time domain symbol is not allowed to carry data, and the method comprises the following steps:
all frequency domain resources in the time domain symbol for the uplink transmission are occupied by the uplink reference signal; alternatively, the first and second electrodes may be,
and a part of frequency domain resources used for the uplink transmission in the time domain symbol are occupied by the uplink reference signal, and the frequency domain resources not occupied by the uplink reference signal in the time domain symbol are not allowed to carry data.
7. A method of communication, the method comprising:
the network equipment sends configuration information to the terminal, wherein the configuration information is used for indicating whether the time domain symbol in which the uplink reference signal is located allows carrying data or not;
the network equipment receives the uplink reference signal sent by the terminal; the configuration information includes any one or any combination of a modulation order of uplink transmission, a coding rate of uplink transmission, and a transmission power of uplink transmission.
8. A method of communication, the method comprising:
the network equipment determines whether the uplink reference signal supports frequency multiplexing with data;
the network equipment sends configuration information to a terminal, wherein the configuration information is used for indicating whether the time domain symbol where the uplink reference signal is located allows carrying data or not, and the configuration information comprises whether the uplink reference signal supports frequency multiplexing with data or not;
the network equipment receives the uplink reference signal sent by the terminal;
wherein the determining, by the network device, whether the uplink reference signal supports frequency multiplexing with data includes: and when the power margin of the terminal is less than a fourth threshold, the network equipment determines that the uplink reference signal does not support frequency multiplexing with data.
9. A terminal, characterized in that the terminal comprises: a transmitter, a receiver, and a processor;
the receiver is configured to receive indication information from a network device, where the indication information is used to indicate configuration of uplink transmission;
the processor is configured to determine whether the time domain symbol in which the uplink reference signal is located is allowed to carry data according to the indication information, and generate an uplink signal to be transmitted;
the transmitter is configured to transmit the uplink signal to the network device;
the configuration of the uplink transmission indicated by the indication information includes at least one of a modulation order of the uplink transmission, a coding rate of the uplink transmission, and a transmission power of the uplink transmission.
10. The terminal of claim 9, wherein:
the configuration of the uplink transmission indicated by the indication information comprises a modulation order of the uplink transmission;
the processor is specifically configured to:
and when the modulation order of the uplink transmission is smaller than a first threshold, determining that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
11. The terminal of claim 9, wherein:
the configuration of the uplink transmission indicated by the indication information comprises a coding rate of the uplink transmission;
the processor is specifically configured to:
and when the coding rate of the uplink transmission is less than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
12. The terminal of claim 9, wherein:
the configuration of the uplink transmission indicated by the indication information comprises a modulation order of the uplink transmission and a coding rate of the uplink transmission;
the processor is specifically configured to:
and when the modulation order of the uplink transmission is smaller than a first threshold and the coding rate of the uplink transmission is smaller than a second threshold, the terminal determines that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
13. The terminal of claim 9, wherein:
the configuration of the uplink transmission indicated by the indication information comprises the transmitting power of the uplink transmission;
the processor is specifically configured to:
and when the transmitting power of the uplink transmission is greater than a third threshold, determining that the time domain symbol in which the uplink reference signal is located is not allowed to carry data.
14. The terminal according to any of claims 10 to 13, characterized by:
the time domain symbol is not allowed to carry data, and the method comprises the following steps:
all frequency domain resources in the time domain symbol for the uplink transmission are occupied by the uplink reference signal; alternatively, the first and second electrodes may be,
and a part of frequency domain resources used for the uplink transmission in the time domain symbol are occupied by the uplink reference signal, and the frequency domain resources not occupied by the uplink reference signal in the time domain symbol are not allowed to carry data.
15. A network device, characterized in that the network device comprises: a transmitter, a receiver, and a processor; the processor performs, in conjunction with the transmitter and the receiver:
sending configuration information to a terminal, wherein the configuration information is used for indicating whether the time domain symbol in which the uplink reference signal is located allows carrying data;
receiving the uplink signal sent by the terminal;
the configuration information includes any one or any combination of a modulation order of uplink transmission, a coding rate of uplink transmission, and a transmission power of uplink transmission.
16. A network device, characterized in that the network device comprises: a transmitter, a receiver, and a processor; the processor performs, in conjunction with the transmitter and the receiver:
determining whether the uplink reference signal supports frequency multiplexing with data;
sending configuration information to a terminal, wherein the configuration information is used for indicating whether a time domain symbol in which an uplink reference signal is located is allowed to carry data or not, and the configuration information comprises whether the uplink reference signal supports frequency multiplexing with data or not;
receiving the uplink reference signal sent by the terminal;
wherein determining whether the uplink reference signal supports frequency multiplexing with data comprises: and when the power margin of the terminal is less than a fourth threshold, determining that the uplink reference signal of the uplink transmission does not support frequency multiplexing with data.
CN201710296586.4A 2017-04-28 2017-04-28 Communication method and device Expired - Fee Related CN108809559B (en)

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