CN109586869B - SRS transmission method, phase difference processing method, communication device and storage medium - Google Patents
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Abstract
The embodiment of the invention discloses an SRS sending method, a phase difference processing method, communication equipment and a storage medium. The SRS sending method applied to the first communication equipment comprises the following steps: sending an SRS by utilizing an SRS symbol, wherein the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS.
Description
Technical Field
The present invention relates to synchronization technologies in the field of communications, and in particular, to a Sounding Reference Signal (SRS) transmission method, a phase difference processing method, a communication device, and a storage medium.
Background
The 5G system allows SRS to be transmitted on consecutive symbols within one slot. The 5G system supports full band access for low and high frequencies. In a high-frequency communication scenario, a phase difference may exist between consecutive symbols for transmitting the SRS due to the influence of phase noise and the like, and the phase difference may affect the accuracy of SRS detection. Conventionally, such a phase difference is measured by transmitting a phase tracking signal or the like for detecting the phase difference. However, channel sounding relies on the transmission of a phase tracking signal, resulting in problems such as increased system overhead and cumbersome operation.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to an SRS transmission method, a phase difference processing method, a communication device, and a storage medium, which at least partially solve the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for sending a sounding reference signal SRS, which is applied to a first communication device, and includes:
sending an SRS by utilizing an SRS symbol, wherein the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS.
Optionally, the portion where the two SRS symbols adjacent in the time domain have the same frequency resource at least includes: one resource element RE.
Optionally, the number of REs corresponding to communication resources with the same frequency resource of two adjacent SRS symbols in the time domain has a corresponding relationship with the SRS bandwidth, where the SRS bandwidth is a bandwidth for transmitting the SRS once.
Optionally, the frequencies occupied by the plurality of SRS symbols used for sending the SRS by frequency hopping are sequentially increased;
or,
the frequencies occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping are sequentially reduced;
or,
sequentially increasing subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping;
or,
and sequentially reducing the subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping.
Optionally, the method further comprises:
receiving a predetermined signaling; wherein the predetermined instruction is used for explicitly and/or implicitly indicating the transmission parameters of the SRS;
the sending of the SRS by using the SRS symbol includes:
and transmitting the SRS by utilizing the SRS symbol according to the transmission parameter.
Optionally, the sending parameter includes at least one of:
a transmission mode of the SRS;
a transmission pattern of the SRS;
resource parameters of the same frequency resources occupied by the two adjacent SRS symbols in the time domain; wherein the resource parameter comprises at least one of:
the number of RE;
and obtaining a corresponding relation between the number of REs and the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
Optionally, the same frequency resource portion occupied by two SRS symbols adjacent in the time domain is used for the second communication device to perform phase difference estimation between two adjacent transmission symbols in the time domain, and/or perform phase compensation based on the estimated phase difference.
In a second aspect, an embodiment of the present invention provides a phase difference processing method, which is applied to a second communication device, and includes:
receiving an SRS sent by first communication equipment by using an SRS symbol, wherein the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS,
optionally, the method further comprises:
and estimating the phase difference of two adjacent transmission symbols in the time domain according to the receiving parameters of the parts with the same frequency resources in the two adjacent SRS symbols in the time domain.
Optionally, the method further comprises:
based on the estimated phase difference, phase compensation is performed.
Alternatively,
the part of the two adjacent SRS symbol frequency resources in the time domain, which is the same, at least comprises: one resource element RE;
or,
the number of REs included in the same portion of the two adjacent SRS symbol frequency resources in the time domain has a corresponding relation with the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
Optionally, the method further comprises:
transmitting predetermined signaling, wherein the predetermined signaling is used for explicitly and/or implicitly indicating SRS transmission parameters;
the receiving of the SRS transmitted by the first communication device by using the SRS symbol includes:
and receiving the SRS according to the sending parameters.
Optionally, the sending parameter includes at least one of:
the SRS transmission mode
A transmission pattern of the SRS;
resource parameters of the same frequency resources occupied by the two adjacent SRS symbols in the time domain; wherein the resource parameter comprises at least one of:
the number of RE;
and obtaining a corresponding relation between the number of REs and the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
In a third aspect, an embodiment of the present invention provides a communication device, including:
a transceiver for transceiving information;
and a processor, connected to the transceiver, configured to control information transmission and reception of the transceiver, and execute the SRS transmission method according to one or more of the above-mentioned technical solutions, or execute the phase difference processing method according to one or more of the above-mentioned technical solutions.
In a fourth aspect, an embodiment of the present invention provides a communication device, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executed by the processor;
the processor is connected to the transceiver and the memory, respectively, and configured to implement the SRS transmission method according to one or more of the above-mentioned technical solutions by executing the computer program, or to execute the phase difference processing method according to one or more of the above-mentioned technical solutions.
In a fifth aspect, an embodiment of the present invention provides a computer storage medium, where a computer program is stored in the computer storage medium; the computer program, when executed, may implement the SRS transmission method according to one or more of the above-mentioned aspects, or the phase difference processing method according to one or more of the above-mentioned aspects.
According to the SRS sending method, the phase difference processing method, the communication device and the storage medium provided by the embodiment of the invention, when the SRS is sent, the frequency resources occupied by two adjacent SRS symbols on the time domain are at least partially the same, and at least part of the parts with the same frequency resources are sent by using the same antenna port, so that the second communication device receiving the SRS can determine the phase difference based on the SRS, thereby realizing the sending without depending on additional reference signals, such as the sending of phase tracking signals, and having the characteristics of simple operation and simple and convenient realization. Meanwhile, the SRS is transmitted by utilizing specific communication resources, the SRS not only can be used for detecting the channel state, but also can be used for determining the phase difference, the dual functions of the SRS transmission are obviously realized, and the estimation of the phase difference can also be used for compensating the receiving phase of the next SRS, so that the accurate receiving of the SRS is realized, the feedback is acted on the channel detection, and the accuracy of the channel detection can be improved.
Drawings
Fig. 1 is a flowchart illustrating a first SRS transmission method according to an embodiment of the present invention;
fig. 2 is a schematic resource distribution diagram of an SRS symbol according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a second SRS transmission method according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a first phase difference estimation method according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a phase difference estimation and compensation method according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a resource pattern;
FIG. 7 is a diagram of another resource pattern;
fig. 8 is a schematic resource distribution diagram of another SRS symbol according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a frequency hopping transmission according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
As shown in fig. 1, the present embodiment provides an SRS transmission method, applied to a first communication device, including:
step S110: sending an SRS by utilizing an SRS symbol, wherein the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS.
In this embodiment, the first communication device may be a User Equipment (UE), and at this time, the SRS transmitted in step S110 is an uplink SRS. The SRS is an uplink sounding reference signal and can be used for sounding uplink channel states in different frequency ranges. In still other embodiments, the first communication device may also be a base station, e.g., an evolved node b (eNB) or a next generation base station (gNB).
The step S110 may include: and transmitting the SRS by frequency hopping. When the SRS is transmitted by adopting frequency hopping, at least parts of occupied frequency resources of any two SRS symbols are different.
For example, if the available communication bandwidth between the first communication device and the second communication device is B, the SRS symbol may be at least partially different transmission symbols in a plurality of frequency resources dispersed in the B.
In this embodiment, the transmission symbol may be various types of Orthogonal Frequency Division Multiplexing (OFDM) symbols, for example, the OFDM symbols may include: a fourier transform spread-based orthogonal frequency division multiplexing (DFT-s-OFDM) symbol, or a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) symbol.
One slot includes 7 or 14 of the transmission symbols. The time domain resources occupied by the transmission symbols in the time domain and the frequency resources occupied by the transmission symbols in the frequency domain are determined. In the present embodiment, two SRS symbols adjacent to each other in the time domain may be understood as two SRS symbols transmitted continuously in the time domain.
In this embodiment, at least part of the frequency resources occupied by two SRS symbols adjacent in the time domain are the same, which indicates that: at least a portion of the frequency band occupied by the SRS symbols is the same. The communication resources are collectively referred to herein as frequency resources and time domain resources. For example, 1 transmission symbol includes: 4 Physical Resource Blocks (PRB). The 1 PRB includes 12 Resource Elements (REs), and the portion of the same frequency Resource occupied by two SRS symbols adjacent in the time domain may be 1 or 2 PRBs, or a partial RE in 1 PRB.
In fig. 2, the horizontal axis represents time t and the vertical axis represents frequency f, so the horizontal axis represents a time axis and the vertical axis represents a frequency axis. In fig. 2, 4 PRBs are configured in one SRS symbol for SRS transmission, and there are partial RBs of the 4 PRBs used for SRS transmission in two SRS symbols adjacent in the time domain in the frequency domain, which are the same, indicating that at least partial frequency resources in the two SRS adjacent in the time domain are the same, and the other partial frequency resources are different. In the present embodiment, SRS port0 indicates SRS transmitted with antenna port0 and SRS port1 indicates SRS transmitted with antenna port1 in fig. 2. In fig. 2, a smallest lattice represents one RE, and in the SRS transmission method shown in fig. 2, the number of REs sharing the same frequency resource for each antenna port in two adjacent SRS symbols in the time domain is 2.
Further, at least part of the communication resources of the same frequency of the two time domain adjacent SRS symbols use the same antenna port.
In this embodiment, the antenna port is a logical port and has a corresponding relationship with a physical antenna (e.g., an antenna element) of the communication device. Different antenna ports, typically using different precoding matrices. The antenna port may be used to transmit various signals, for example, various reference signals, and the antenna port used in this embodiment may be a port for transmitting an SRS, so to a certain extent, the antenna port in the embodiment of the present invention may also be referred to as an SRS antenna port. In some embodiments, one antenna port may be used for transmission of different signals, and such antenna ports may be multiplexed by different signal transmissions.
In this embodiment, the same frequency resource portions of two adjacent SRS symbols in the time domain are transmitted using one or more same antenna ports, which indicates that the SRS is transmitted using the same antenna elements and/or precoding matrices, and the transmission channels experienced by the SRS are the same or approximately the same, that is, the SRS meets the preset similar condition. In this way, the transmission channel on which the SRS is received by the second communication device satisfies the similar condition, the channel variation caused by the transmission channel is almost negligible, and the reception phase difference between two adjacent SRS symbols received at this time is substantially from the internal oscillator of the first communication device and/or the second communication device. Therefore, by using the method provided by this embodiment, the SRS can be transmitted without depending on the transmission of an additional Reference Signal, such as the transmission of a Phase-Tracking Signal (PTRS), and the receiving Phase difference between two adjacent SRS symbols can be simply estimated according to the receiving conditions of the two adjacent SRS symbols in the time domain, thereby reducing the transmission of the additional Reference Signal, reducing the overhead, and simplifying the Phase estimation. Meanwhile, the SRS is a channel detection signal and can be used for channel detection, the dual functions of channel detection and phase difference estimation are realized simultaneously through the sending of the SRS signal, the phase difference can be compensated based on the estimation of the phase difference, and then the compensation is reacted on the channel detection, so that the accuracy and the reliability of the channel detection are improved.
In this embodiment, the method includes:
determining the SRS symbol for transmitting the SRS, for example, determining the SRS symbol by means of dynamic scheduling, static allocation, or semi-static scheduling of resources, where the determined SRS symbol needs to satisfy that frequency resources occupied by two adjacent SRS symbols in a time domain are partially overlapped, and in other embodiments, frequency resources occupied by two adjacent SRS symbols in the time domain are not partially overlapped.
In still other embodiments, the method further comprises:
and selecting antenna ports used by the parts with the same frequency resources of the two SRS symbols adjacent in the time domain, wherein the selected antenna ports ensure that at least one of the antenna ports used by the parts with the same frequency resources of the two SRS symbols adjacent in the time domain is the same.
After the determination of the SRS symbol and the selection of the antenna port are completed, the SRS is transmitted using the determined SRS symbol and the selected antenna port in step S110.
Optionally, the portion where the two SRS symbols adjacent in the time domain have the same frequency resource at least includes: one RE.
In this implementation, the portions of the two SRS symbols adjacent in the time domain and having the same frequency resource need to include at least 1 RE, and are not limited to 1 RE in specific implementation, for example, the communication resources of the portions having the same frequency resource include at least 1 RE, and preferably 1 RE. The overlapped frequency resources of 1 RE already enable the second communication device to perform phase difference estimation, and also enable the total frequency bandwidth occupied by two adjacent SRS symbols to be increased, so that the number of SRS sounding in the whole frequency band can be reduced, thereby reducing the number of SRS transmission and simplifying the SRS sounding process.
It is noted that, in the SRS transmission process, the number of the same communication resources included in the frequency resources occupied by two adjacent SRS symbols in the time domain is not limited to 1 RE, and may also be 2 REs, 3 REs, 4 REs, and other values.
In some embodiments of the present invention, the,
the number of REs included in the same portion of the two adjacent SRS symbol frequency resources in the time domain has a corresponding relation with the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
In this embodiment, the frequency width occupied by transmitting the SRS once is the SRS bandwidth. For example, if the bandwidth for transmitting an SRS is the bandwidth occupied by one transmission symbol, the bandwidth for transmitting the SRS is equal to the width of the frequency band occupied by one transmission symbol.
In this embodiment, the number of REs included in the same portion of two SRS symbol frequency resources adjacent in the time domain is in a corresponding relationship with the SRS bandwidth.
In some embodiments, the number of REs is inversely related to the SRS bandwidth, that is, under certain conditions, the larger the SRS bandwidth is, the smaller the number of REs is. At this time, the number of REs corresponds to a single SRS bandwidth.
In some embodiments, the correspondence relationship is: and the corresponding relation between the bandwidth interval where the SRS bandwidth is located and the RE number. The corresponding relationship between the bandwidth interval and the number of REs can be as follows:
as can be seen from the above table, when the SRS bandwidth of a single SRS symbol is 4 to 12 PRBs, the number of overlapping REs of adjacent SRS symbols is 1/24 of the SRS bandwidth of the single SRS symbol, that is, 2 REs or 6 REs, which respectively correspond to the SRS bandwidth of 4 PRBs or the SRS bandwidth of 12 PRBs. The number of overlapping REs is the number of REs included in the same frequency resource portion of the two adjacent SRS symbols in the time domain.
In this embodiment, the step S110 transmits the SRS by using frequency hopping. When the SRS is transmitted by frequency hopping, the frequencies occupied by a plurality of SRS symbols used by the SRS symbol frequency hopping transmission are sequentially increased; or the frequencies occupied by the plurality of SRS symbols used for transmitting the SRS by frequency hopping are sequentially reduced.
In some embodiments, the subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS for frequency hopping transmission sequentially increase or decrease.
In general, the relationship between the frequency of the subcarrier and the subcarrier index is positive correlation, and the subcarrier index is larger as the frequency of the subcarrier is larger, so in this embodiment, the subcarrier index of the subcarrier occupied by two adjacent SRS symbols in the time domain changes in one direction, for example, gradually increases or gradually decreases, during frequency hopping transmission.
In short, the frequency of the SRS symbol for frequency hopping transmission SRS changes in a single direction, and thus in this embodiment, the frequency does not need to be increased or decreased. In this embodiment, at least some of the SRS with the same frequency in the SRS symbols adjacent to each other in the time domain can be ensured to be transmitted continuously in the time domain.
Optionally, as shown in fig. 3, the method further includes:
step S100: receiving a predetermined instruction; wherein a predetermined signaling explicitly and/or implicitly indicates transmission parameters of the SRS;
the step S110 may include: and transmitting the SRS by utilizing the SRS symbol according to the transmission parameter.
The predetermined instruction herein may be an instruction that instructs or requests the first communication device to perform various operations, for the second communication device.
In this embodiment, the predetermined signaling may include: various higher layer or physical layer signaling. For example, Radio Resource Control (RRC) signaling, a Control unit for medium access Control (MAC CE), downlink Control signaling (DCI), or various scheduling commands, for example, grant Resource scheduling signaling of the UE. The higher layer signaling here may include: the signaling of the layers above the physical layer, for example, the signaling of the RRC layer, or the signaling of the MAC layer. The physical layer signaling may include the DCI, etc.
In this embodiment, the predetermined signaling may explicitly indicate the transmission parameter, where the explicit indication includes: and directly carrying the sending parameters in the preset signaling, so that the first communication equipment extracts the sending parameters from the preset instruction after receiving the preset instruction.
In still other embodiments, the predetermined signaling may implicitly indicate the transmission parameters, and the implicit indication includes: and transmitting the predetermined signaling by using predetermined signaling having a corresponding relation with the transmission parameter of the SRS and/or by using the transmission parameter of the predetermined signaling having a corresponding relation with the transmission parameter of the SRS. In this way, when receiving the predetermined signaling, the first communication device may determine the transmission parameter of the SRS according to a signaling type of the received predetermined signaling and/or a reception parameter of the predetermined signaling. The predetermined signaling having a correspondence relationship with the transmission parameters of the SRS may include information such as the SRS bandwidth and/or a coded modulation scheme (MCS) and/or a subcarrier spacing. The receiving parameters may include: and receiving time and/or frequency point position of the preset signaling.
And the first communication equipment transmits the SRS by utilizing SRS symbols based on the transmission parameters after receiving the transmission parameters.
The transmission parameters include at least one of:
a transmission mode of the SRS; the sending mode may include: frequency hopping transmission and non-frequency hopping transmission;
a transmission pattern of the SRS; the transmission pattern may be: the distribution condition of SRS symbols in the whole communication resource;
resource parameters of the same frequency resources occupied by the two adjacent SRS symbols in the time domain; wherein the resource parameter comprises at least one of:
the number of RE;
and obtaining a corresponding relation between the number of REs and the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
The number of REs may be related parameters of communication resources corresponding to the same frequency resource, for example, the number of overlapping REs, the correspondence between the number of overlapping REs and the SRS bandwidth, and the like.
In some embodiments, the sending the parameter may further include: the resource parameter of the SRS symbol may be, for example, a time domain resource position, a frequency resource position of the SRS symbol, a resource starting position of the SRS symbol, a repetition period, or other related parameters.
In this way, the first communication device transmits the SRS according to the transmission parameter, which is convenient for the second communication device to receive and perform phase difference estimation according to the received SRS.
Optionally, the same frequency resource portion occupied by two SRS symbols adjacent in the time domain is used for the second communication device to perform phase difference estimation between two adjacent transmission symbols in the time domain, and/or perform phase compensation based on the estimated phase difference.
Because the frequency of the communication resources occupied by the adjacent SRS symbols in the time domain is the same, and at least part of the communication resources are the same, and the same antenna ports are used, in this way, the phase difference caused by the frequency and the channel is the same or close, and the phase difference caused by the frequency and the channel is negligible, if the receiving phases of the two adjacent SRS symbols received by the second communication device are different, the main reason of the difference (i.e., the phase difference) is the phase difference caused by the internal oscillator of the first communication device and/or the second communication device, so that the second communication device can detect the phase difference without depending on other reference signals, such as a PTRS signal, and simultaneously, the SRS can be used for channel detection, and the phase difference compensation in the channel detection process, and the transmission of one SRS signal realizes multiple functions.
In some embodiments, the SRS transmission parameter is a parameter that is interacted between the first communication device and the second communication device, and in some further implementations, the SRS transmission parameter may be known in advance by both the first communication device and the second communication device, for example, a network element of a core network issues to the first communication device and the second communication device in advance, or is directly written into a communication protocol and preset in the first communication device and the second communication device.
As shown in fig. 4, the present embodiment provides a phase difference processing method applied to a second communication device, including:
step S210: receiving an SRS sent by first communication equipment by using an SRS symbol, wherein the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS.
In certain embodiments, the method further comprises:
step S220: and estimating the phase difference of two adjacent transmission symbols in the time domain according to the receiving parameters of the parts with the same frequency resources in the two adjacent SRS symbols in the time domain.
In this embodiment, the second communication device is an opposite device of the first communication device, and if the first communication device is a UE, the second communication device may be a base station.
In this embodiment, the second communication device receives the SRS transmitted from the SRS symbol, where the SRS symbol is the aforementioned various transmission symbols for transmitting the SRS.
After receiving the SRS in this embodiment, the method performs estimation of the phase difference between two adjacent SRS symbols according to the received parameters of the same frequency resource in the two adjacent SRS symbols in the time domain, so that the estimation of the phase difference can be achieved according to the SRS transmission itself, and thus, there is no need to rely on the transmission of other reference signals such as PTRS,
The receiving parameters herein may include: the receiving phase, for example, the receiving phase of the nth SRS symbol is deta1, and the receiving phase of the (n + 1) th SRS symbol is deta2, and when calculating the phase difference, the phase difference is calculated according to the deta1 and the deta2, for example, the phase difference is obtained by performing a difference operation on the deta1 and the deta 2. Alternatively, the receiving parameters may include: the channel information with phase offset, for example, the channel information with phase offset of the nth SRS symbol and the n +1 th SRS symbol is respectively H1exp(jx1) And H1exp(jx2) (ii) a Where H1 denotes the estimated channel value, x1Is expressed as a phase value, x, corresponding to the nth SRS symbol2Expressed as the phase value for the (n + 1) th SRS symbol. Then, the ratio of the two can be used, i.e., (H)1exp(jx1))/H1exp(jx2) Calculating the phaseDifference, i.e. exp (j (x)1-x2))。
Further, as shown in fig. 5, the method further includes:
step S230: based on the estimated phase difference, phase compensation is performed.
In this embodiment, phase compensation may also be performed based on the estimated phase difference. The phase compensation here is phase compensation for the next transmission symbol, so as to accurately receive the SRS, thereby implementing accurate channel detection and estimation.
In some embodiments, the portion where the two time-domain adjacent SRS symbol frequency resources are the same comprises at least: one resource element RE;
or,
the number of REs included in the same portion of the two adjacent SRS symbol frequency resources in the time domain has a corresponding relation with the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
In this embodiment, the two SRS symbols adjacent in the time domain and having the same frequency resource include at least one RE, and in a specific implementation, the two SRS symbols adjacent in the time domain may include one or more REs.
In this embodiment, the number of REs has a corresponding relationship with the SRS bandwidth, and this corresponding relationship may be a corresponding relationship between specific values of the SRS bandwidth and may also have a corresponding relationship with a bandwidth interval in which the SRS bandwidth is located. In some embodiments, the number of REs included in the same portion of the two SRS symbol frequency resources adjacent to each other in the time domain is inversely related to the bandwidth frequency of the bandwidth interval in which the SRS bandwidth is located.
As shown in fig. 5, the method further comprises:
step S200: transmitting predetermined signaling, wherein the predetermined signaling is used for explicitly and/or implicitly indicating SRS transmission parameters;
the step S210 may include:
and receiving the SRS according to the sending parameters.
In this embodiment, before the first communication device transmits the SRS, the second communication device first transmits the predetermined signaling to the first communication device, where the predetermined signaling may be used to explicitly and/or implicitly indicate the SRS transmission parameter to the first communication device.
The second communication device itself receives the SRS based on the transmission parameters in step S210.
For example, the transmission parameters include at least one of: a transmission mode of the SRS; a transmission pattern of the SRS; resource parameters of the same frequency resources occupied by the two adjacent SRS symbols in the time domain; wherein the resource parameter comprises at least one of: the number of RE; and obtaining a corresponding relation between the number of REs and the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
One specific example is provided below in connection with any of the embodiments described above:
the present example provides an SRS transmission method that can be applied to 5G high band communication. The communication frequency band of 5G includes: a low frequency band below 6Ghz and a high frequency band between 6Ghz and 100 Ghz. The SRS transmission method provided in this example can be applied to a high frequency band of 6Ghz to 100Ghz, but is not limited to the high frequency band, and can also be applied to a low frequency band or other frequency bands.
The SRS transmission method according to the present example can be used to solve the problem of a phase difference between adjacent SRS symbols due to phase noise or the like. The phase noise here may be included due to inherent defects of the oscillator itself of the wireless signal. The phase noise may include: random white noise, flicker noise, etc.
Two SRS symbols transmitted adjacent to each other in the time domain may cause a phase difference problem due to phase noise or the like. The SRS transmission method provided in this example is proposed for such reasons as phase noise, and on the basis of not increasing additional overhead (i.e., not designing a special phase tracking reference signal, i.e., SRS-PTRS, for SRS), a method of partially overlapping between hopping frequencies is proposed to eliminate a phase difference caused by phase noise in adjacent consecutive SRS symbols, thereby improving the accuracy of SRS detection by a base station. And, the proposed SRS phase difference estimation method utilizes the partial overlap portion in the proposed SRS transmission method to estimate and cancel the phase difference in the adjacent SRS symbols.
The SRS symbol is a transmission symbol for carrying the SRS. For example, the transmission symbol may be a DFT-s-OFDM symbol or a CP-OFDM symbol, and in particular implementations, the transmission symbol carrying the SRS is not limited to the DFT-s-OFDM symbol or the CP-OFDM symbol.
SRS transmission schemes are classified into non-frequency hopping transmission and frequency hopping transmission.
The above-mentioned phase difference problem caused by adjacent SRS symbols does not exist when SRS is not frequency-hopped transmitted (i.e. all antenna ports are transmitted in each SRS symbol in a frequency band of a certain same frequency range, only one or several SRS symbols are transmitted at a time).
However, in practical situations, especially in 5G high frequency communication, the UE transmission power is usually very limited, and when the channel condition is poor and CSI information with large bandwidth and high quality is desired to be obtained, the above method without frequency hopping transmission fails.
When the SRS is transmitted by frequency hopping, there is usually no overlap between the frequency hopping transmissions of the SRS, that is, each SRS symbol only transmits a sounding signal with a partial bandwidth, and the frequency ranges covered by different SRS symbols are different and do not overlap, so that a larger frequency range can be detected to a greater extent. When the problem of phase difference generated by adjacent SRS symbols is involved, a currently common possible solution is to schedule SRS and PUSCH in one symbol, and use a PTRS (referred to as PUSCH-PTRS in this example) related to Physical Uplink Shared Channel (PUSCH) demodulation as a reference signal for eliminating the phase difference between adjacent SRS symbols.
Fig. 6 shows an example, which takes 4 consecutive SRS symbols (2 SRS ports) in the time domain as an example. Although SRS and PUSCH use different precoding (precoding), if a Phase Tracking Signal (PTRS) of a Physical Uplink Shared Channel (PUSCH) exists, a Phase difference between adjacent symbols calculated by the PUSCH-PTRS can be used for Phase difference measurement and cancellation of adjacent SRS symbols. GP in fig. 6 is a guard interval; the PDCCH is a physical downlink control channel; DMRS is a demodulation reference signal. As can be seen from fig. 6, the SRS symbol may be transmitted by occupying only a part of the communication resources on the PUSCH.
In fig. 6, when the PUSCH-PTRS is present, the SRS transmission density in the time domain is 1. One column is called 1 transmission symbol, and one minimum square represents one RE.
However, the above method fails in the following cases:
when the Modulation and Coding Scheme (MCS) of the PUSCH is low, the PUSCH-PTRS is not transmitted or the time domain transmission density of the PUSCH-PTRS transmission is low, and at this time, the phase difference between adjacent SRS symbols cannot be measured and eliminated or cannot be accurately measured and eliminated.
PTRS assists demodulation of PUSCH by canceling phase rotation in PUSCH, and its presence and its time domain transmission density are related to MCS of PUSCH as shown in the following table:
TABLE 1 relationship between PUSCH-PTRS time-domain Transmission Density and MCS of scheduled PUSCH
In table 1, there may be values of equal time domain transmission density of 1/4, 1/2 or 1 for PUSCH-PTRS, TD1, TD2 and TD3 without PTRS. If there is no PTRS or the time-domain transmission density is low, the phase difference between adjacent SRS symbols cannot be measured and eliminated or cannot be accurately measured and eliminated. The schematic diagram without PUSCH-PTRS is shown in fig. 7.
When the communication resources of the SRS and the PUSCH-PTRS are not scheduled for transmission together (i.e., the SRS is transmitted in one or more symbols alone), there is no transmission of the PUSCH-PTRS, and the phase difference between adjacent SRS symbols cannot be calculated.
Fig. 7 illustrates an example of time-division multiplexing transmission of SRS and PUSCH. Fig. 7 shows that 4 consecutive SRS symbols in the time domain are not scheduled in the same transmission symbol as the PUSCH-PTRS, and thus there is no PUSCH-PTRS.
As described above, if SRS is restricted to be scheduled only in the MCS of certain PUSCH or SRS must be scheduled together with PUSCH, the scheduling of SRS is restricted, severely limiting the flexibility of SRS scheduling. On the other hand, even if the transmission of the SRS and the PUSCH is restricted to be scheduled together, when the MCS of the PUSCH is low, the PUSCH-PTRS is not transmitted or the PUSCH-PTRS transmission time domain transmission density is low, and then the phase difference between adjacent SRS symbols cannot be measured and eliminated or cannot be accurately measured and eliminated.
In the present example, in order to solve the above-described problem of phase difference between adjacent SRS symbols due to phase noise or the like in the frequency hopping transmission of SRS symbols continuously transmitted in the time domain in one slot, an SRS transmission method and a phase difference estimation method have been designed. According to the SRS sending method, on the basis of not increasing extra overhead (namely, not specially designing a special phase tracking reference signal (namely SRS-PTRS) for the SRS), a mode of partial overlapping between frequency hopping is provided to eliminate a phase difference caused by phase noise in adjacent continuous SRS symbols, and the accuracy of SRS detection by a base station is improved. And, the proposed SRS phase difference estimation method utilizes the partial overlap portion in the proposed SRS transmission method to estimate and cancel the phase difference in the adjacent SRS symbols.
Specifically, this example provides an SRS transmission method including:
when the SRS is transmitted by frequency hopping, frequency resources occupied by SRS partial bandwidths in any two SRS symbols adjacent to each other in a time domain for transmitting the SRS are overlapped (namely the SRS frequency hopping bandwidths are overlapped), and communication resources in the frequency overlapping part have at least one same antenna port.
In particular, assume that NSRSDenotes the number of symbols in a slot or a subframe of SRS in DFT-s-OFDM or CP-OFDM system, then NSRSPossible values being 1 or 2 or 4 or other values, e.g. NSRS≥2。
In this example, the number of antenna ports: number of antenna ports N used for SRS transmission ap1,2 or 4 or other values.
SRS bandwidth: the bandwidth occupied by the SRS symbol may be a multiple of 4 physical resource blocks PRB, for example, may be 4, 8, 12, or 16 PRBs.
SRS transmission requirements: all antenna ports needed for transmission are mapped in each SRS symbol.
Further, at least one overlapped RE needs to be provided in the same antenna port of the overlapping portion, and the number of the overlapped REs specifically needed is related to the size of the SRS bandwidth in each SRS symbol, for example, has a preset corresponding relationship.
The schematic diagram of the overlapping manner is shown in fig. 8. In fig. 8, there are 4 SRS symbols (2 antenna ports among them) that are consecutive in time domain, and the overlapping manner of the proposed design is schematically illustrated. In the figure, 2 time-domain consecutive SRS symbols all have overlapping portions, and each SRS symbol is 2 REs.
The number of overlapped REs corresponding to the same frequency resource of two adjacent SRS symbols is shown in table 1 below:
the number of overlapped REs required in Table 1 is related to the bandwidth of the scheduled SRS
FD 1-FD 2-FD 3 … -FDn. Specifically, the parameter can also be matched with parameters such as SRS bandwidth configuration, namely cell-specific parameter SRS-bandwidth-congestion-control-frequency-CSRSAnd the like to configure a specific SRS bandwidth. SRS one current uplink bandwidth configuration in Long Term Evolution (LTE) standard
An example bandwidth configuration of time is as follows for reference:
mSRS,bandNband b is 0,1,2,3, and the value range of the uplink bandwidth is as follows:
wherein,
representing uplink bandwidth configuration, and representing the uplink bandwidth configuration by the number of RBs; m isSRS,bAnd b is 0,1,2,3 for each
A value related to the SRS sequence length; n is a radical ofiAnd i is 0,1,2,3 for each
A value associated with the frequency domain position index; cSRSIs a cell-specific parameter indicating for each one
The SRS bandwidth configuration set has a value range of CSRS∈{0,1,2,3,4,5,6,7}；BSRSIs a parameter which is specific to user equipment (UE-specific) and related to SRS bandwidth, can be configured by high-level signaling, and has a value range of BSRS∈{0,1,2,3}。
An example is as follows:
table 2 provides an example of the number of overlapping REs required, which is related to the bandwidth of the scheduled SRS.
A certain antenna port is composed of REs of several frequencies, or it can be said that a certain antenna port is mapped to several REs in SRS symbols for transmission.
In some embodiments, the bandwidth of one SRS symbol may be provided with an upper limit value, which may be the maximum SRS bandwidth in the above table.
Different antenna ports are multiplexed in a comb and cyclic shift manner. That is, in the same SRS symbol, the multiplexing mode of different antenna ports in the frequency domain is: comb and Cyclic Shift (comb + Cyclic Shift), that is, different antenna ports are frequency division multiplexed in the frequency domain in a multiplexing manner of every 2 REs or every 4 REs or other interval values in one SRS symbol, and if the number of antenna ports is large, multiplexing is performed in a code division manner of different Cyclic shifts. Comb refers to multiplexing in equally spaced frequency bands, the spacing being 2 or 4 subcarriers or the rest.
For n SRS symbols (n is 2 or 4 or other values) with continuous time domain, the subband range occupied by the scheduled SRS bandwidth in each SRS symbol is transmitted in a frequency-up or frequency-down sequential frequency hopping manner (and it is necessary to ensure that adjacent symbols overlap), so that it is ensured that there is overlap between adjacent SRS symbols.
Fig. 9 shows an example of an SRS hopping transmission scheme. In fig. 9, the horizontal axis represents time t, and the vertical axis represents frequency f. One square represents one or more transmission symbols in the parallel horizontal axis direction and one square represents one or more subbands in the vertical axis direction. In fig. 9, a block is filled with UE1 and UE2, which respectively indicate communication resources used by UE1 and UE2 for transmitting SRS signals. If SRS frequency hopping transmission is adopted, it is obvious that at different time points in the time domain, the subbands used for transmission by UE1 and UE2 are different, and such inter-frequency hopping transmission is frequency hopping transmission.
Suppose fg(ns) Indicating in a certain time slot nsThe hopping pattern of the middle SRS can be as shown in FIG. 9, and the above-mentioned sequential frequency hopping transmission (and it is necessary to ensure that adjacent symbols overlap) in frequency up or frequency down is included in the above-mentioned fg(ns) In (1). The frequency domain position index (e.g., frequency domain position index), the frequency domain starting position of the SRS, the SRS configuration parameters such as the SRS bandwidth, etc. are modified and changed according to the frequency hopping pattern.
The sending method further comprises the following steps: after SRS transmission, the phase difference of front and back SRS symbols is estimated by using the overlapped RE of the same antenna port in the front and back adjacent SRS symbols, and the estimated phase difference is compensated between the adjacent SRS symbols.
The SRS transmission mode or the SRS transmission pattern may be configured to schedule the UE for transmission in an explicit and/or implicit manner through a Radio Resource Control (RRC) signaling and/or a Media Access Control (MAC) CE signaling and/or a Downlink Control Information (DCI) signaling and/or a UE grant signaling; or, the SRS transmission method/transmission pattern is transmitted by default without indication.
The relation between the number of overlapped REs required for SRS and the scheduled SRS bandwidth (i.e. table 1) may indicate the UE to transmit in an explicit and/or implicit manner through downlink higher layer RRC signaling and/or MAC CE signaling and/or DCI signaling and/or UE grant signaling; or, the number of overlapped REs needed by the SRS is transmitted by default without indication.
For n SRS symbols (n is 2 or 4 or other values) with continuous time domain, the subband range occupied by the scheduled SRS bandwidth in each SRS symbol is transmitted in a frequency-up or frequency-down sequential frequency hopping manner (and it is necessary to ensure that adjacent symbols overlap), so that it is ensured that there is overlap between adjacent SRS symbols.
After SRS is transmitted, the phase difference of front and back SRS symbols is estimated by using the overlapped RE of the same antenna port in two adjacent SRS symbols in the time domain, and the estimated phase difference is compensated between the adjacent SRS symbols.
The SRS transmission mode or the SRS transmission pattern may explicitly and/or implicitly schedule the UE to transmit through a downlink higher layer RRC signaling and/or MAC CE signaling and/or DCI signaling and/or UE grant signaling; or, the SRS transmission method/transmission pattern is transmitted by default without indication.
The number of overlapped REs needed by the SRS and the bandwidth of the scheduled SRS have a corresponding relation, and the corresponding relation can also indicate the UE to transmit in an explicit and/or implicit mode through downlink high-level RRC signaling, MAC CE signaling, DCI signaling and/or UE grant signaling; or, the number of overlapped REs needed by the SRS is transmitted by default without indication.
An embodiment of the present invention further provides a first communication device, including:
a storage unit including a storage medium operable to store the SRS;
a first transmitting unit, including a transmitting antenna, configured to transmit an SRS using an SRS symbol, where the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS.
Optionally, the portion where the two SRS symbols adjacent in the time domain have the same frequency resource at least includes: one resource element RE.
Optionally, the number of REs corresponding to communication resources with the same frequency resource of two adjacent SRS symbols in the time domain has a corresponding relationship with the SRS bandwidth, where the SRS bandwidth is a bandwidth for transmitting the SRS once.
Optionally, the frequencies occupied by the plurality of SRS symbols used for sending the SRS by frequency hopping are sequentially increased; or the frequencies occupied by the plurality of SRS symbols used for sending the SRS by frequency hopping are sequentially reduced; or the subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping are sequentially increased; or the subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping are sequentially reduced.
Optionally, the first communication device further comprises:
a first receiving unit, which may include a receiving antenna, for receiving a predetermined signaling; wherein the predetermined instruction is used for explicitly and/or implicitly indicating the transmission parameters of the SRS;
the first transmitting unit is specifically configured to transmit the SRS using the SRS symbol according to the transmission parameter.
The transmission parameters and the reception parameters of the same frequency portions of two SRS symbols adjacent in time domain may be used for the estimation of the phase difference and/or the related description of the phase difference compensation, which can be referred to the foregoing embodiments and will not be repeated here.
The present embodiment further provides a second communication device, including:
a second receiving unit, which may correspond to a receiving antenna, and may be configured to receive an SRS transmitted by a first communication device using an SRS symbol, where the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; at least parts of the two adjacent SRS symbols in the time domain, which have the same frequency resource, use the same antenna port to transmit the SRS;
the estimating unit, which may correspond to the processor, may be configured to perform phase difference estimation on two adjacent transmission symbols in the time domain according to the received parameters of the same portion of the frequency resources in the two adjacent SRS symbols in the time domain.
Optionally, the second communication device further comprises:
a compensation unit, which may correspond to the processor, may be configured to perform phase compensation based on the estimated phase difference.
Optionally, the portion where the two SRS symbols adjacent in the time domain have the same frequency resource at least includes: one resource element RE; or the number of REs included in the same portion of the two adjacent SRS symbol frequency resources in the time domain has a corresponding relationship with the SRS bandwidth, where the SRS bandwidth is a bandwidth for transmitting the SRS once.
Optionally, the second communication device further comprises:
a second transmitting unit, which may correspond to a transmitting antenna, and may be configured to transmit a predetermined signaling, where the predetermined signaling is used for explicitly and/or implicitly indicated SRS transmission parameters;
the second receiving unit may be configured to receive the SRS according to the transmission parameter.
An embodiment of the present invention provides a communication device, including:
a transceiver for transceiving information;
and a processor, connected to the transceiver, configured to control information transmission and reception of the transceiver, and execute any one or more of the SRS transmission methods or any one or more of the phase difference processing methods.
The transceiver may include a transceiving antenna of a communication device, such as a UE or a base station, and may be used for transmission of wireless signals, so as to achieve transceiving of the information.
The processor may include: a central processing unit, a microprocessor, a digital signal processor, a programmable array, an application processor, or an application specific integrated circuit, etc.
The processor may be connected to the processor through an integrated circuit bus or the like, and may control information transmission and reception of the transceiver by transmission of a control signaling to the transceiver.
When the communication device is a first communication device, the processor executes the SRS sending method, and when the communication device is a second communication device, the processor executes the phase difference processing method.
As shown in fig. 10, the present embodiment provides a communication apparatus including: a transceiver 310, a memory 320, a processor 330, and a computer program stored on the memory 320 and executed by the processor 330;
the processor 330 is connected to the transceiver 310 and the memory 320, respectively, and configured to implement, by executing the computer program, the SRS transmission method according to one or more embodiments, or implement the phase difference processing method according to one or more embodiments.
The transceiver 310 may be a transceiver antenna in a communication device;
the memory 320 may be a piece of memory 320 including a storage medium in the communication device, and may be a random access memory 320, a read only memory 320, a storage hard disk, and the like.
The processor 330, which may be any one or more of the processors 330 described above, may be connected to the transceiver 310 and the memory 320 via an integrated circuit bus (IIC) or the like.
The processor 330 may read the computer program from the memory 320 and execute the computer program, so as to implement the SRS transmission method applied to the first communication device or execute the phase difference processing method applied to the second communication device.
The embodiment also provides a computer storage medium, wherein the computer storage medium stores a computer program; the computer program, when executed, is capable of executing one or more of the SRS transmission methods applied in the first communication device or one or more of the phase difference processing methods applied in the second communication device.
The computer storage medium may be: a mobile storage device, a Read-Only memory (ROM) or y, a Random Access Memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.
Optionally, the computer storage medium is preferably a non-transitory storage medium, or a non-volatile storage medium.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (16)
1. A Sounding Reference Signal (SRS) sending method applied to a first communication device includes:
sending an SRS by using SRS symbol frequency hopping, wherein, for the SRS sent by frequency hopping, the occupied frequency resources of any two SRS symbols are at least partially different; the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least part of the two adjacent SRS symbols in the time domain, which have the same frequency resource, transmits the SRS by using the same antenna port, wherein the two adjacent SRS symbols in the time domain are two SRS symbols which are continuously transmitted in the time domain.
2. The method of claim 1,
the part of the two adjacent SRS symbol frequency resources in the time domain, which is the same, at least comprises: one resource element RE.
3. The method according to claim 1 or 2,
the number of REs corresponding to the communication resource with the same frequency resource of two adjacent SRS symbols in the time domain has a corresponding relation with the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
4. The method according to claim 1 or 2,
the frequencies occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping are sequentially increased;
or,
the frequencies occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping are sequentially reduced;
or,
sequentially increasing subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping;
or,
and sequentially reducing the subcarrier indexes of subcarriers occupied by a plurality of SRS symbols used by the SRS sent by frequency hopping.
5. The method according to claim 1 or 2, characterized in that the method further comprises:
receiving a predetermined signaling; wherein the predetermined instruction is used for explicitly and/or implicitly indicating the transmission parameters of the SRS;
the sending of the SRS by using the SRS symbol includes:
and transmitting the SRS by utilizing the SRS symbol according to the transmission parameter.
6. The method of claim 5,
the transmission parameters include at least one of:
a transmission mode of the SRS;
a transmission pattern of the SRS;
resource parameters of the same frequency resources occupied by the two adjacent SRS symbols in the time domain; wherein the resource parameter comprises at least one of:
the number of RE;
and obtaining a corresponding relation between the number of REs and the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
7. The method according to claim 1 or 2,
the same frequency resource portion occupied by two SRS symbols adjacent to each other in the time domain is used for the second communication device to perform phase difference estimation between two adjacent transmission symbols in the time domain, and/or perform phase compensation based on the estimated phase difference.
8. A phase difference processing method applied to a second communication device, comprising:
receiving an SRS sent by a first communication device by using sounding reference signal SRS symbol frequency hopping, wherein for the SRS sent by the first communication device by frequency hopping, occupied frequency resources of any two SRS symbols are at least partially different; the SRS symbol is a transmission symbol for transmitting the SRS; frequency resources occupied by two adjacent SRS symbols in a time domain are at least partially the same; and at least part of the two adjacent SRS symbols in the time domain, which have the same frequency resource, transmits the SRS by using the same antenna port, wherein the two adjacent SRS symbols in the time domain are two SRS symbols which are continuously transmitted in the time domain.
9. The method of claim 8, further comprising:
and estimating the phase difference of two adjacent transmission symbols in the time domain according to the receiving parameters of the parts with the same frequency resources in the two adjacent SRS symbols in the time domain.
10. The method of claim 9, further comprising:
based on the estimated phase difference, phase compensation is performed.
11. The method according to any one of claims 8 to 10,
the part of the two adjacent SRS symbol frequency resources in the time domain, which is the same, at least comprises: one resource element RE;
or,
the number of REs included in the same portion of the two adjacent SRS symbol frequency resources in the time domain has a corresponding relation with the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
12. The method according to any one of claims 8 to 10, further comprising:
transmitting predetermined signaling, wherein the predetermined signaling is used for explicitly and/or implicitly indicating SRS transmission parameters;
the receiving of the SRS transmitted by the first communication device by using the SRS symbol includes:
and receiving the SRS according to the sending parameters.
13. The method according to claim 9 or 10,
the transmission parameters include at least one of:
the SRS transmission mode
A transmission pattern of the SRS;
resource parameters of the same frequency resources occupied by the two adjacent SRS symbols in the time domain; wherein the resource parameter comprises at least one of:
the number of RE;
and obtaining a corresponding relation between the number of REs and the SRS bandwidth, wherein the SRS bandwidth is the bandwidth for transmitting the SRS once.
14. A communication device, comprising:
a transceiver for transceiving information;
a processor connected to the transceiver for controlling the transceiver to transmit and receive information and executing the method provided by any one of claims 1 to 7 or claims 8 to 13.
15. A communication device, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executed by the processor;
the processor, coupled to the transceiver and the memory, respectively, is configured to implement the method of any one of claims 1 to 7, or claims 8 to 13, by executing the computer program.
16. A computer storage medium storing a computer program; the computer program, when executed, is capable of implementing the method as provided in any one of claims 1 to 7, or claims 8 to 13.
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