WO2021063190A1 - 信号发送和处理方法及装置 - Google Patents
信号发送和处理方法及装置 Download PDFInfo
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- WO2021063190A1 WO2021063190A1 PCT/CN2020/116012 CN2020116012W WO2021063190A1 WO 2021063190 A1 WO2021063190 A1 WO 2021063190A1 CN 2020116012 W CN2020116012 W CN 2020116012W WO 2021063190 A1 WO2021063190 A1 WO 2021063190A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
- H04W56/007—Open loop measurement
- H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0026—Interference mitigation or co-ordination of multi-user interference
- H04J11/003—Interference mitigation or co-ordination of multi-user interference at the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
Definitions
- the present invention relates to the field of terminals, and in particular to a method and device for signal transmission and processing.
- satellite mobile communication has great advantages. Its communication distance is long, covering area is large, and communication frequency bandwidth is wide. It can provide users with communication services at any time and any place. Therefore, the application prospects of satellite mobile communication are very broad, especially in international and domestic communications, emergency rescue and disaster relief, etc. It has unique advantages.
- the satellite mobile communication system can be divided into a geostationary orbit (Geostationary Earth Orbit, GEO) system, a medium orbit (Medium Earth Orbit, MEO) satellite communication system and a low earth (Low Earth Orbit, LEO) satellite communication system .
- GEO geostationary Earth Orbit
- MEO medium orbit
- LEO low earth
- the base station and the terminal in order to achieve normal communication between the base station and the terminal, it is first necessary to use the downlink and uplink synchronization signals to estimate the initial timing and frequency offset on the terminal side and the base station side respectively, so that the terminal can succeed. Access to the network; during the network connection period, the base station and the terminal also need to keep track of the changes in timing and frequency offset to ensure the correct transmission of uplink and downlink synchronization and communication data.
- Uplink data, control information, and demodulation reference signal can be used to estimate the uplink timing advance and residual frequency offset value of a specific terminal, but the uplink data, control information and demodulation reference signal transmission of a specific terminal Depending on the base station scheduling, it may happen that there is no uplink data transmission of the terminal for a certain period of time.
- Channel sounding reference signal Sounding Reference Signal, SRS
- SRS Sounding Reference Signal
- the terminal without Global Navigation Satellite System (GNSS) positioning capability needs to adopt closed-loop measurement, that is, the terminal sends a signal, the base station measures the signal and feeds it back to the terminal to perform the uplink timing position and frequency offset track.
- GNSS Global Navigation Satellite System
- a specific terminal can send an SRS in a specific time-frequency resource, and the base station can obtain information about the terminal's uplink timing position and frequency offset change after receiving the SRS.
- satellite communication systems Compared with terrestrial cellular mobile communication systems, satellite communication systems have a greater frequency offset change rate and timing point change rate.
- frequency deviation change rate imagine a low-orbit satellite system with a satellite orbit height of 600km.
- the maximum Doppler frequency deviation change rate of the system is about 0.25ppm/s, that is, the equivalent frequency deviation change rate 0.5 when the carrier frequency is 2GHz.
- the equivalent frequency deviation change rate is 7.5kHz/s, so the subcarrier spacing of the low frequency band or the high frequency band (the minimum subcarrier width of the low frequency band is 15kHz, and the minimum subcarrier width of the high frequency band is 60kHz)
- the timing point change rate imagine the low-orbit satellite system with a satellite orbit height of 600km as described above.
- the round-trip transmission delay change rate of the terminal at the smallest elevation angle is about ⁇ 45us/s, and it is located under the satellite with a radius of 100km.
- the difference in the round-trip transmission delay change rate between the terminals at both ends of the coverage area is 10 us/s, and the SRS structure specified in the existing agreement may not be able to achieve the uplink timing tracking function under all conditions.
- the embodiment of the present invention provides a signal transmission and processing method and device.
- the scheme of the embodiment of the present invention can effectively increase the SRS symbol length and the detectable uplink timing position change range, and improve the uplink timing position and frequency offset of the terminal equipment. Tracking effect.
- an embodiment of the present invention provides a signal sending method, including:
- the SRS is sent to a target base station, where the target base station can detect through the received SRS that the uplink timing position change range of the terminal device that sends the SRS is not less than 1 SRS symbol length.
- the SRS is obtained by time-domain mapping from an SRS frequency-domain sequence with a superimposed mask.
- the method further includes generating the SRS frequency domain sequence of the superimposed mask, which specifically includes:
- the SRS frequency domain sequence is multiplied by the mask sequence to generate the SRS frequency domain sequence of the superimposed mask.
- the multiplying the SRS frequency domain sequence by the mask sequence includes multiplying one frequency domain data in one SRS frequency domain sequence by an element of the mask sequence, and the corresponding formula is as follows:
- one piece of frequency domain data in the SRS frequency domain sequence of the superimposed mask is the length of the SRS frequency domain sequence.
- the method before said generating a channel sounding reference signal SRS, the method further includes:
- said obtaining the preset plus mask form includes:
- the masked form search table including the index number and the masked form corresponding to the index number;
- the preset masking form is determined according to the reading result.
- the mask sequence is a first mask sequence generated according to a base station related parameter and a first SRS related parameter, where the base station related parameter is a satellite cell or satellite beam related parameter corresponding to the target base station.
- the mask sequence is a second mask sequence generated according to a terminal device related parameter and a first SRS related parameter, and the terminal device related parameter includes a cell radio network temporary identifier of the terminal device.
- the mask sequence is a third mask sequence generated according to the first SRS related parameter and the second SRS related parameter, and the second SRS related parameter is used to indicate the time-frequency resource of the SRS.
- the method before the generating the channel sounding reference signal SRS, the method further includes:
- an indication parameter of a target base station that the terminal device needs to send an SRS, where the indication parameter is used to characterize the type of satellite cell or satellite beam corresponding to the target base station;
- the generating the channel sounding reference signal SRS includes:
- the SRS is generated according to the first indication signaling.
- the generating the channel sounding reference signal SRS includes:
- the SRS is generated according to the second indication signaling.
- an embodiment of the present invention provides a signal processing method, including:
- the SRS is obtained from the SRS frequency domain sequence of the superimposed mask through time domain mapping, and the tracking the uplink timing position of the terminal device according to the SRS includes:
- the method before obtaining the mask sequence corresponding to the SRS, the method further includes:
- the method before the receiving the SRS sent by the terminal device, the method further includes:
- the method before the receiving the SRS sent by the terminal device, the method further includes:
- the second indication signaling is sent to the terminal device, where the second indication signaling is used to indicate that the transmission structure supported by the SRS includes a comb structure and a non-comb structure.
- an embodiment of the present invention provides a signal sending device, the device including:
- the processing unit generates a channel sounding reference signal SRS
- the output unit sends the SRS to the target base station, where the target base station can detect through the received SRS that the uplink timing position change range of the terminal device that sends the SRS is not less than 1 SRS symbol length.
- the SRS is obtained by time-domain mapping from an SRS frequency-domain sequence with a superimposed mask.
- the device includes a generating unit configured to generate the SRS frequency domain sequence of the superimposed mask, which is specifically configured to:
- the SRS frequency domain sequence is multiplied by the mask sequence to generate the SRS frequency domain sequence of the superimposed mask.
- the multiplying the SRS frequency domain sequence by the mask sequence includes multiplying one frequency domain data in one SRS frequency domain sequence by an element of the mask sequence, and the corresponding formula is as follows:
- one piece of frequency domain data in the SRS frequency domain sequence of the superimposed mask is the length of the SRS frequency domain sequence.
- the device further includes a preset unit for:
- a preset masking form is acquired, and the position of the superimposing mask in the SRS frequency domain sequence is determined according to the preset masking form.
- said obtaining the preset plus mask form includes:
- the masked form search table including the index number and the masked form corresponding to the index number;
- the preset masking form is determined according to the reading result.
- the mask sequence is a first mask sequence generated according to a base station related parameter and a first SRS related parameter, where the base station related parameter is a satellite cell or satellite beam related parameter corresponding to the target base station.
- the mask sequence is a second mask sequence generated according to a terminal device related parameter and a first SRS related parameter, and the terminal device related parameter includes a cell radio network temporary identifier of the terminal device.
- the mask sequence is a third mask sequence generated according to the first SRS related parameter and the second SRS related parameter, and the second SRS related parameter is used to indicate the time-frequency resource of the SRS.
- the device further includes an indicating unit for:
- the indication parameter is used to characterize the type of satellite cell or satellite beam corresponding to the target base station;
- the indicating parameter is within the range of the parameter value that can be masked.
- the device is specifically configured to:
- the SRS is generated according to the first indication signaling.
- the device is specifically configured to:
- the SRS is generated according to the second indication signaling.
- an embodiment of the present invention provides a signal processing device, the device including:
- the receiving unit is used to receive the SRS sent by the terminal device
- the tracking unit is configured to track the uplink timing position of the terminal device according to the SRS, and the uplink timing position change range is not less than 1 SRS symbol length.
- the SRS is obtained from the SRS frequency domain sequence of the superimposed mask through time domain mapping
- the tracking unit is specifically configured to:
- the tracking unit before acquiring the mask sequence corresponding to the SRS, the tracking unit is further configured to:
- the receiving unit before the receiving the SRS sent by the terminal device, the receiving unit is further configured to:
- the receiving unit before the receiving the SRS sent by the terminal device, the receiving unit is further configured to:
- the second indication signaling is sent to the terminal device, where the second indication signaling is used to indicate that the transmission structure supported by the SRS includes a comb structure and a non-comb structure.
- an embodiment of the present invention provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute any of the methods described in the first aspect, or execute the method as described in the second aspect Any of the methods described.
- an embodiment of the present invention provides a computer program product, characterized in that the computer program product includes computer program code, and when the computer program code runs on a computer, the computer executes any of the tasks as in the first aspect.
- the method described in one, or the method described in any one of the second aspect is performed.
- an embodiment of the present invention provides a communication device, including: an input interface circuit, a logic circuit, and an output interface circuit, wherein the logic circuit is used to execute the method according to any one of the first aspects, or , Execute the method according to any one of the second aspect.
- the terminal equipment first generates the channel sounding reference signal SRS and sends the SRS to the target base station; the target base station receives the SRS sent by the terminal equipment, and tracks the uplink timing of the terminal equipment according to the SRS Position, where the uplink timing position change range is not less than 1 SRS symbol length.
- the generated SRS can effectively increase the SRS symbol length and the detectable uplink timing position change range, and improve the tracking effect of the uplink timing position and frequency offset of the terminal equipment.
- FIG. 1 is a schematic diagram of a satellite communication scenario and architecture provided by an embodiment of the present invention
- FIG. 2 is a schematic diagram of a base station that cannot distinguish the uplink timing positions of two terminals according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of another base station in which the uplink timing positions of two terminals cannot be distinguished according to an embodiment of the present invention
- FIG. 4 is a schematic flowchart of a signal sending and processing method according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a conventional SRS multi-user uplink timing location detection result provided by an embodiment of the present invention.
- FIG. 6 is a schematic diagram of another traditional SRS multi-user uplink timing location detection result provided by an embodiment of the application.
- FIG. 7 is a schematic diagram of an indication mark for enabling SRS mask provided by an embodiment of the application.
- FIG. 8 is a schematic diagram of a detection result of a multi-user uplink positioning position of an SRS with superimposed masks according to an embodiment of the application;
- FIG. 9 is a schematic diagram of another multi-user uplink positioning position detection result of SRS with superimposed masks according to an embodiment of the present invention.
- FIG. 10 is a schematic flowchart of another signal sending and processing method according to an embodiment of the present invention.
- FIG. 11 is a schematic diagram of indication signaling for setting subcarrier width according to an embodiment of this application.
- FIG. 12 is a schematic flowchart of another signal sending and processing method according to an embodiment of this application.
- FIG. 13A is a schematic diagram of subcarriers when the sending comb parameter is 2 according to an embodiment of the application.
- FIG. 13B is a schematic diagram of another subcarrier when the sending comb parameter is 4 according to an embodiment of the application.
- FIG. 14 is a schematic diagram of a setting support beam structure indication signaling provided by an embodiment of the application.
- 15 is a schematic structural diagram of a signal sending device provided by an embodiment of this application.
- FIG. 16 is a schematic structural diagram of a signal processing device provided by an embodiment of the application.
- FIG. 17 is a schematic structural diagram of an apparatus provided by an embodiment of the present invention.
- FIG. 18 is a schematic structural diagram of a network device provided by an embodiment of the present invention.
- Figure 1 is a schematic diagram of a satellite communication scenario and architecture provided by an embodiment of the application.
- the satellite shown in Figure 1 has signal processing capabilities, or the satellite transparently forwards terminal equipment signals to the ground station to achieve wide area coverage. .
- a protocol stack compatible with the existing 3GPP LTE/NR is adopted.
- the terminal equipment is an ordinary mobile terminal or a dedicated terminal, and the transmission process also follows the LTE/NR protocol.
- the terminal device can send the SRS in a specific time-frequency resource, and the base station can obtain the information of the uplink timing position and frequency offset change of the terminal device after receiving the SRS.
- the SRS sequence stipulated by the traditional LTE/NR protocol is generated as follows: In the resource mapping process of the physical layer, the SRS frequency domain sequence is mapped to the corresponding frequency domain resource according to the time-frequency position allocated by the relevant parameters, and then passed through the fast Fourier Inverse Fast Fourier Transform (IFFT) generates time-domain symbols.
- IFFT Inverse Fast Fourier Transform
- the frequency domain sequence of SRS is defined as the base sequence And the phase rotation coefficient e j ⁇ n , where the base sequence is multiplied by the phase rotation coefficient to achieve the effect of code division multiplexing. After being transformed into the time domain, it is equivalent to the time domain cyclic shift.
- the specific expression of the SRS frequency domain sequence is as follows :
- the parameter ⁇ is used to represent the cyclic shift of SRS, and is defined as follows:
- SRS base sequence The way of generating is determined by the sequence length M ZC :
- the base sequence is a special sequence generated based on Quadrature Phase Shift Keying (QPSK), the formula is as follows:
- N ZC is the largest prime number that satisfies N ZC ⁇ M ZC.
- the SRS sequence generated in the above manner is mapped to the corresponding time-frequency resource according to the configuration information indicated by the base station, in addition to the comb multiplexing of spaced subcarrier mapping and the code division multiplexing form of time domain cyclic shift, it will also pass through the time domain. Multiplexing, frequency domain multiplexing and symbol multiplexing are used to improve resource utilization.
- SRS uses comb multiplexing, that is, the SRS frequency domain subcarrier width is K TC times the uplink data subcarrier, and the SRS time domain symbol length is 1/K TC of the uplink data symbol.
- One uplink data symbol is equivalent to containing K TC repeated SRS symbols;
- SRS uses code division multiplexing, that is, SRS using the same time-frequency resource can multiplex different cyclic shift forms of the same base sequence.
- the two multiplexing forms of comb multiplexing and code division multiplexing improve the utilization of time-frequency resources, they also limit the estimable uplink timing position range of the SRS sent at a certain time interval, resulting in the SRS specified in the current agreement.
- the structure cannot meet the uplink timing location tracking requirements of some satellite communication scenarios.
- SRS can use code division multiplexing, that is, SRS mapped to the same time-frequency resource can multiplex the same base sequence with different cyclic shift values.
- the timing change rate of the satellite communication system is relatively large, so a terminal transmits SRS twice The change of the uplink timing position within the time interval may exceed the cyclic shift interval, making the base station unable to distinguish the uplink timing point positions of the terminal and other terminals.
- the limitation of cyclic shift results in that the uplink timing position change of a certain terminal within the time interval of two SRS transmissions that the base station can distinguish cannot reach the length of 1 SRS symbol.
- FIG. 2 is a schematic diagram of a base station that cannot distinguish the uplink timing positions of two terminals according to an embodiment of the application. As shown in FIG.
- the timing position of terminal 1 is in window 1, and that of terminal 2
- the timing position is located in the window 3; at T1, the changed timing positions of the terminals 1 and 2 are both within the window 2, which makes it difficult for the base station to distinguish the respective timing positions of the two terminals.
- Figure 3 is another schematic diagram of the base station being unable to distinguish the uplink timing positions of two terminals according to an embodiment of this application. As shown in Figure 3, at time T0, the timing position of terminal 1 is in window 1; at time T1 , The changed timing positions of terminals 1 and 2 are both within the window 2, which makes it difficult for the base station to distinguish the respective timing positions of the two terminals.
- SRS uses different comb parameters and corresponding cyclic shift values. Under different subcarrier conditions, the maximum timing position variation range of different terminals that the base station can distinguish is shown in Table 1.
- Table 1 The maximum timing position change range of the terminal that can be distinguished by the terminal using SRS base stations with different configurations
- Table 2 The upper limit of the terminal's SRS transmission period required by the base station
- the SRS In order to meet the uplink timing tracking requirements of the conditions in Table 2, the SRS must be frequently sent in a smaller period, which will cause a greater overhead to resources.
- SRS can use comb multiplexing, that is, the SRS frequency domain subcarrier width is larger than the uplink data subcarrier width, and the SRS time domain symbol length is shorter than the uplink data symbol length.
- the uplink timing position change during the time interval between two SRS transmissions of a certain terminal may exceed 1 SRS symbol.
- the base station detects the uplink timing position, it will happen that the SRS symbol is used as the symbol.
- the interval timing point detects the ambiguity problem.
- the round-trip transmission delay change rate of the terminal located at the minimum elevation angle of the satellite coverage area is relatively large. Assume that the round-trip transmission delay change rate of the terminal is 45us/s. If the SRS is sent in a period of 320ms, the difference between the two SRS transmission time intervals is The uplink timing position change is 14.4us, and the current SRS cannot support the uplink timing position detection under the conditions indicated by the underline in Table 3.
- Satellite communication systems especially low-orbit satellite communication systems, have a large uplink timing change rate.
- the base station side cannot use the traditional SRS structure to detect the uplink timing position change of one or more SRS symbol lengths, so it cannot meet all scenarios.
- Upstream timing tracking demand Therefore, it is necessary to enhance the design of SRS.
- the base station can distinguish the respective uplink timing positions of different terminals that send enhanced SRS sequences to meet the requirements of the satellite communication system. Upstream timing tracking demand.
- FIG. 4 provides a schematic flowchart of a signal sending and processing method according to an embodiment of the application. As shown in FIG. 4, the method specifically includes the following steps:
- the terminal device generates a channel sounding reference signal SRS, and sends the SRS to the target base station, where the SRS is obtained from the SRS frequency domain sequence with the superimposed mask through time domain mapping.
- the traditional SRS frequency domain sequence generation method is:
- phase rotation in the frequency domain is equivalent to the cyclic shift in the time domain; parameters Used to indicate the cyclic shift of SRS, M ZC is the length of the SRS frequency domain sequence.
- each terminal in the network connection stage is sending SRS to the base station at a certain density, the time-frequency resource overhead of SRS is very large.
- the code division multiplexing form of SRS is introduced, and the range of changes in the uplink timing position of each terminal that SRS can tolerate is SRS symbols; satellite communication systems generally have a large timing change rate. Due to the limitation of cyclic shifts in this code division multiplexing, the base station may not be able to distinguish SRS sequences that use the same base sequence and different cyclic shifts. Different terminals transmitting SRS with the same time-frequency resource.
- FIG. 5 is a schematic diagram of a traditional SRS multi-user uplink timing position detection result provided by an embodiment of the application.
- FIG. 5 is a schematic diagram of another traditional SRS multi-user uplink timing location detection result provided by an embodiment of this application.
- T1 the SRS sent by each terminal for the second time arrives at the base station at the same time, and the base station detects each The peak position of the terminal is shown in Figure 6.
- the SRS frequency domain sequence generated by the terminal device in the embodiment of the present application is an SRS frequency domain sequence with a superimposed mask.
- a mask is a string of binary codes that performs an exclusive OR operation on the target field to mask the current input bit.
- the mask sequence is a sequence composed of multiple mask elements.
- the main function of the mask sequence is to enable the base station to distinguish different terminal devices that use different cyclic shifts of the same base sequence as the SRS sequence and transmit SRS on the same time-frequency resource.
- the superimposed masked SRS sequence expands the range of changes in the uplink timing position of each terminal that can be detected by the base station to one SRS symbol by adding a mask in the frequency domain.
- the terminal After the terminal generates the SRS frequency domain sequence of the superimposed mask, according to the relevant parameters issued by the target base station, the SRS frequency domain sequence of the superimposed mask is mapped to the corresponding time-frequency resource, and then uses the inverse fast Fourier transform (Inverse Fast Fourier Transform).
- IFFT inverse Fast Fourier Transform
- the target base station refers to the base station that communicates with the terminal device.
- the frequency domain data is multiplied by the mask sequence to change the phase of the frequency domain data.
- the SRS frequency domain sequence and the mask can be multiplied in many forms: for example, the real and imaginary parts of the SRS frequency domain data can be multiplied by two different elements of the mask sequence, c(2n) and c(2n+1), respectively. Either one SRS frequency domain data as a whole is multiplied by an element c(n) of the mask sequence, or N SRS frequency domain data as a whole is multiplied by an element c(n) of the mask sequence.
- M ZC is the length of the SRS frequency domain sequence.
- the mask sequence can choose to use commonly used pseudo-random sequence forms such as m-sequence, M-sequence, and Gold sequence.
- the elements in the mask sequence are 1, -1 or a scaling value of 1, -1.
- the mask sequence can be a sequence common to the entire network.
- the 8 cyclic shift values corresponding to SRS comb parameter 2 and the 12 cyclic shift values corresponding to comb parameter 4 have corresponding fixed mask sequences.
- the mask sequence It is only related to the comb parameter and the corresponding cyclic shift value. All base stations and terminals agree to use a mask sequence containing the same elements; the mask sequence can be a sequence common to a satellite cell (or satellite beam), and the generation of the sequence is related to at least one Satellite cell (or satellite beam) specific parameters are related to comb parameters and corresponding cyclic shift values.
- Satellite cell (or satellite beam) specific parameters can be satellite cell (or satellite beam) index number, bandwidth part (Bandwidth Part, BWP) Index number, synchronization signal block (Synchronization Signal Block, SSB) index number, etc.;
- the mask sequence can be a terminal-specific sequence, and the generation of the sequence is related to at least one terminal-specific parameter, comb parameter, and corresponding cyclic shift value ,
- the terminal-specific parameter can be the cell-radio network temporary identifier (C-RNTI) of the terminal, etc.;
- the mask sequence can also be a sequence related to the time-frequency resource mapped by the SRS, and the sequence is generated Related to at least one SRS time-frequency resource related parameter, comb parameter, and corresponding cyclic shift value, the SRS time-frequency resource parameter includes the symbol index of the time-frequency resource, the slot number index, the frequency domain resource index, and so on.
- an SRS frequency domain sequence with a superimposed mask and its mask generation form Take the 31-level Gold sequence as an example to generate the mask sequence c(n):
- x 1 (n+31) (x 1 (n+3)+x 1 (n))mod2
- x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2
- the mask sequence is a sequence related to the satellite cell (or satellite beam) index number, comb parameters, and corresponding cyclic shift values.
- the seeds of the m sequence that make up the mask sequence are obtained from the satellite cell (or satellite beam) index number and the cyclic shift parameter of the SRS according to a certain operation rule.
- the m-sequence seed generation method is:
- the mask sequence c(n) is generated using the above-mentioned seed and Gold sequence generation rules.
- the terminal side and the base station side agree to multiply one SRS frequency domain data as a whole by an element c(n) of the mask sequence, and then the length of the generated mask sequence is at least M ZC .
- the SRS frequency domain sequence is masked, it is mapped to the corresponding subcarrier of the SRS time-frequency resource, and the terminal side generates the final transmitted time-domain data through IFFT.
- the SRS frequency domain sequence masking method is close to the sub-satellite point. Satellite cells (or satellite beams) and satellite cells (or satellite beams) close to the edge of the coverage area can play a greater role, while other satellite cells (or satellite beams) may have little effect. Therefore, different configuration parameters can be used between satellite cells (or satellite beams), and the SRS mask function can be determined according to the configuration parameters: the satellite cell (or satellite beam) level indicator parameters can be divided, when the parameters are in a certain segment The mask scrambling method is not used in the interval.
- the parameter division method is agreed between the base station and the terminal, or is issued by the base station in the broadcast information.
- the indication parameters include the Doppler frequency offset value and the public round-trip transmission delay. , Public round-trip transmission delay change rate, beam angle, etc. These indicating parameters are the corresponding parameters of a reference point in the satellite cell (or satellite beam), or the corresponding parameter of a reference point plus an offset value; or
- RRC Radio Resource Control
- FIG. 7 is an SRS mask enablement provided by an embodiment of this application.
- the target base station obtains a mask sequence corresponding to the received SRS, and decodes the SRS frequency domain sequence of the superimposed mask according to the mask sequence, to obtain frequency domain data in the SRS.
- the target base station After the target base station receives the signal sent by the terminal, it uses c(n) in the local mask sequence set to align with the M ZC subcarriers of the SRS frequency domain sequence, and restore the SRS frequency in the same masking method as the terminal. Domain data.
- the form of the masking of the frequency domain data on the terminal side and the demasking of the frequency domain data on the base station side must be consistent.
- the form of adding and unmasking at the transceiver end can be an agreement between the terminal and the base station, or the way indicated by the base station.
- the base station needs to use the system message block SIB1 (System Information Block Type 1) and other system information (Other System Information, At least one of broadcast information, such as OSI), Management Information Base (MIB, Management Information Base), transmits instruction information in a masked form to the terminal.
- SIB1 System Information Block Type 1
- other system information At least one of broadcast information, such as OSI), Management Information Base (MIB, Management Information Base
- transmits instruction information in a masked form to the terminal can be used.
- the base station can use an index number in the index table of the indication form shown in Table 4 to indicate the masking form to the terminal.
- the index table is agreed upon by the terminal and the base station, or is issued by the base station
- the index number Instruction form 0 Mask the real and imaginary parts of the frequency domain data separately 1 1 frequency domain data as a whole plus mask ... ... n N frequency domain data are masked as a whole
- the target base station tracks the uplink timing position of the terminal device according to the frequency domain data.
- the target base station After the target base station recovers the SRS frequency domain data according to the local mask sequence, it uses the SRS frequency domain data and corresponding algorithms to estimate the uplink channel quality of the terminal, and detects the uplink timing position, residual frequency offset and other parameters.
- the base station can distinguish different terminals that transmit the same base sequence and different cyclically shifted SRS sequences on the same time-frequency resource.
- the comb parameter of all terminals is 2, and the cyclic shift parameter ⁇ used by terminals 1-8 is in turn ⁇ 0, 2 ⁇ /8, 2 ⁇ 2/8, 2 ⁇ 3/8, 2 ⁇ 4/8, 2 ⁇ 5/8, 2 ⁇ 6/8, 2 ⁇ 7/8 ⁇ , each terminal pair SRS frequency
- different mask sequences are used. Please refer to FIG. 8.
- FIG. 8 is a schematic diagram of a multi-user uplink positioning position detection result of an SRS with a superimposed mask provided by an embodiment of the application.
- the SRS sent by each terminal arrives at the base station at the same time, and the base station uses each terminal individually
- the mask sequence of is descrambled separately, and the peak position of terminal 3 is detected as shown in Figure 7 (here, terminal 3 is taken as an example, and the detection results of other terminals are similar to terminal 3).
- Figure 9 is a schematic diagram of another multi-user uplink positioning location detection result of SRS with superimposed mask provided by an embodiment of the application.
- T1 the SRS sent by each terminal for the second time arrives at the base station at the same time.
- the respective mask sequences of different terminals are used to descramble respectively, and the peak position of the detected terminal 3 is shown in FIG. 8 (the detection results of other terminals are similar). From the detection results of Figures 8-9, by scrambling the SRS frequency domain sequence, the base station performs corresponding descrambling processing during detection, which can distinguish the uplink timing position of each terminal, thereby expanding the detection range of uplink timing position changes.
- the detectable uplink timing of each terminal sending SRS using the same time-frequency resource and different cyclic shift sequences of the same base sequence is expanded.
- the position change range expands the detectable uplink timing change range of the terminal to 1 SRS symbol to meet the timing tracking requirements of the satellite communication system.
- FIG. 10 provides a schematic flowchart of another signal sending and processing method according to an embodiment of the application. As shown in FIG. 10, the method specifically includes the following steps:
- the target base station sends a first indication signaling indicating the width of an SRS subcarrier to a terminal device;
- the terminal device generates an SRS according to the received first indication signaling.
- the terminal device sends the SRS to the target base station.
- the BWP configuration signaling of RRC is used to uniformly indicate the subcarrier width of uplink data and reference signals.
- the BWP does not support the use of dedicated subcarrier widths for SRS. Because SRS uses comb mapping in the frequency domain, SRS The actual subcarrier width is larger than the data subcarrier, so the SRS symbol length is shorter than the data symbol, and the measurable timing range is also smaller. In order to increase the length of the SRS symbol and expand the detectable range of uplink timing position changes, the SRS can select a subcarrier width smaller than that of the data symbol to increase the detectable range of uplink timing position changes.
- the RRC or the indication signaling for increasing the width of the SRS subcarrier in the broadcast information can be selected.
- Figure 11 is a schematic diagram of an indication signaling for setting the width of subcarriers according to an embodiment of this application. You can choose to add SRS dedicated subcarriers to the terminal-level SRS parameter configuration (SRS-Config) of RRC signaling. Carrier width indication signaling.
- dedicated subcarriers are configured for the SRS by using dedicated indication signaling to make the frequency domain mapping of the SRS more dense, thereby increasing the SRS time domain symbol length and the detectable uplink timing position variation range.
- FIG. 12 provides a schematic flowchart of another signal sending and processing method according to an embodiment of the application. As shown in FIG. 12, the method specifically includes the following steps:
- the target base station sends second indication signaling to a terminal device, where the second indication signaling is used to indicate that SRS can support transmission structures including a comb structure and a non-comb structure;
- the terminal device generates an SRS according to the received second indication signaling.
- the terminal device sends the SRS to the target base station.
- FIG. 13A is a schematic diagram of subcarriers when the transmission comb parameter is 2 according to an embodiment of the application. As shown in FIG. 13A, each vertical matrix represents a data symbol subcarrier, and every 2 subcarriers are transmitted.
- An SRS. SRS uses 1/2 subcarrier spacing mapping in the frequency domain, and one data symbol contains 2 repeated SRS symbols.
- FIG. 13B is a schematic diagram of subcarriers when the sending comb parameter is 4 according to an embodiment of the application. As shown in FIG. 13B, each vertical matrix represents a data symbol subcarrier, and every 4 Each subcarrier transmits one SRS, and the SRS uses 1/4 subcarrier spacing mapping in the frequency domain, and one data symbol contains 4 repeated SRS symbols.
- combOffset-n2 is ⁇ 0,1 ⁇
- combOffset-n4 is ⁇ 0,1,2,3, ⁇ .
- Different comb offset parameters can be configured by different terminal devices to realize frequency division multiplexing of different subcarriers.
- the detection of timing points will be ambiguous, that is, the target base station cannot determine the timing boundary of an integer number of SRS symbols.
- the transmission structure of the SRS can be changed to increase the length of the SRS symbol, so that the base station can detect a larger upper timing position change range by using the SRS.
- Figure 14 is a schematic diagram of setting support for beam structure indication signaling according to an embodiment of this application. As shown in Figure 14, it can be selected in the terminal-level SRS resource configuration (SRS-Resource) of RRC signaling. Increase the indication signaling of SRS non-comb structure Comb n1.
- SRS-Resource terminal-level SRS resource configuration
- the SRS is made to support a non-comb structure, that is, the subcarrier width of the SRS is reduced in a disguised manner, thereby increasing the SRS symbol length and the range of changes in the uplink timing position that the terminal can detect.
- FIG. 15 is a schematic structural diagram of a signal sending apparatus according to an embodiment of the application.
- the apparatus 400 includes:
- the processing unit 401 is configured to generate a channel sounding reference signal SRS;
- the output unit 402 is configured to send the SRS to a target base station, where the target base station can detect through the received SRS that the change range of the uplink timing position of the terminal device that sends the SRS is not less than 1 SRS symbol length.
- the SRS is obtained by time-domain mapping from an SRS frequency-domain sequence with a superimposed mask.
- the processing unit 401 is configured to generate the SRS frequency domain sequence of the superimposed mask, which is specifically configured to:
- the SRS frequency domain sequence is multiplied by the mask sequence to generate the SRS frequency domain sequence of the superimposed mask.
- the multiplying the SRS frequency domain sequence by the mask sequence includes multiplying one frequency domain data in one SRS frequency domain sequence Multiplying with an element c(n) of the mask sequence, the corresponding formula is as follows:
- M ZC is the length of the SRS frequency domain sequence.
- the device further includes a preset unit 403, configured to:
- a preset masking form is acquired, and the position of the superimposing mask in the SRS frequency domain sequence is determined according to the preset masking form.
- the acquisition of the preset and masked form includes:
- the masked form search table including the index number and the masked form corresponding to the index number;
- the preset masking form is determined according to the reading result.
- the mask sequence is a first mask sequence generated according to a base station related parameter and a first SRS related parameter, where the base station related parameter is a satellite cell or satellite beam related parameter corresponding to the target base station .
- the mask sequence is a second mask sequence generated according to a terminal device related parameter and a first SRS related parameter
- the terminal device related parameter includes a cell wireless network temporary identity of the terminal device
- the mask sequence is a third mask sequence generated according to the first SRS related parameter and the second SRS related parameter, and the second SRS related parameter is used to indicate the time-frequency resource of the SRS .
- the device further includes an indicating unit 404, configured to:
- the indication parameter is used to characterize the type of satellite cell or satellite beam corresponding to the target base station;
- the indicating parameter is within the range of the parameter value that can be masked.
- the processing unit 401 is specifically used to:
- the SRS is generated according to the first indication signaling.
- the processing unit 401 is specifically configured to:
- the SRS is generated according to the second indication signaling.
- FIG. 16 is a schematic structural diagram of a signal processing device provided by an embodiment of the application. As shown in FIG. 16, the device includes:
- the receiving unit 501 is configured to receive the SRS sent by the terminal device
- the tracking unit 502 is configured to track the uplink timing position of the terminal device according to the SRS, and the uplink timing position change range is not less than 1 SRS symbol length.
- the SRS is obtained from the SRS frequency domain sequence of the superimposed mask through time domain mapping, and the tracking unit 502 is specifically configured to:
- the tracking unit before acquiring the mask sequence corresponding to the SRS, the tracking unit is further configured to:
- the receiving unit 501 before the receiving the SRS sent by the terminal device, the receiving unit 501 is further configured to:
- the receiving unit 501 before the receiving the SRS sent by the terminal device, the receiving unit 501 is further configured to:
- the second indication signaling is sent to the terminal device, where the second indication signaling is used to indicate that the transmission structure supported by the SRS includes a comb structure and a non-comb structure.
- processing unit 401 and the output unit 402 are used to perform steps 101 to 103, 201 to 203, and 301 to 303 of the above method related steps on the terminal device side.
- the receiving unit 501 and the tracking unit 502 are used to perform steps 101 to 103, step 201 to step 203, and step 301 to step 303 of the above method related to the target base station side.
- the device 400 and the device 500 are presented in the form of units.
- the "unit” here can refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above-mentioned functions .
- ASIC application-specific integrated circuit
- processor and memory that executes one or more software or firmware programs
- integrated logic circuit and/or other devices that can provide the above-mentioned functions .
- the apparatus 400 may be implemented with the structure in FIG. 17.
- the apparatus 600 includes at least one processor 601, at least one memory 602, and may also include a radio frequency circuit 603, an antenna 604, and an input/output device 605.
- the processor 601 can be used to process communication protocols and communication data, and can also be used to control terminal devices, execute software programs, and process data of software programs.
- the terminal device may also include a memory 602, which is mainly used to store software programs and data. These related programs can be loaded into the memory when the communication device leaves the factory, or can be loaded into the memory when needed later.
- the radio frequency circuit 603 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
- the antenna 604 is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves.
- Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
- the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
- the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
- the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
- FIG. 14 only one memory and processor are shown in FIG. 14. In an actual terminal device product, there may be one or more processors and one or more memories.
- the memory may also be referred to as a storage medium or storage device.
- the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
- the processor 601 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the programs in the above scheme.
- CPU central processing unit
- ASIC application-specific integrated circuit
- the memory 602 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
- the dynamic storage device can also be electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
- the memory can exist independently and is connected to the processor through a bus.
- the memory can also be integrated with the processor.
- the memory 602 is used to store application program codes for executing the above solutions, and the processor 601 controls the execution.
- the processor 601 is configured to execute application program codes stored in the memory 602.
- the code stored in the memory 602 can execute the signal processing method provided above, such as: generating a channel sounding reference signal SRS; sending the SRS to a target base station, wherein the target base station can detect the transmission of the SRS through the received SRS
- the change range of the uplink timing position of the terminal equipment is not less than 1 SRS symbol length.
- FIG 18 shows a simplified schematic diagram of the structure of a network device.
- the network equipment includes a radio frequency signal transceiver and conversion part and a 92 part, and the radio frequency signal transceiver and conversion part includes a receiving unit 91 part and a sending unit 93 part (also collectively referred to as a transceiver unit).
- the RF signal transceiver and conversion part is mainly used for the transceiver and the conversion of RF signals and baseband signals; the 92 part is mainly used for baseband processing and control of network equipment.
- the receiving unit 91 may also be called a receiver, a receiver, a receiving circuit, etc.
- the sending unit 93 may also be called a transmitter, a transmitter, a transmitter, a transmitting circuit, etc.
- Part 92 is usually the control center of the network equipment, and can usually be referred to as the processing unit, which is used to control the network equipment to execute the steps performed by the target base station in FIG. 4, FIG. 10, and FIG. 12.
- the processing unit which is used to control the network equipment to execute the steps performed by the target base station in FIG. 4, FIG. 10, and FIG. 12.
- Part 92 can include one or more single boards, and each single board can include one or more processors and one or more memories. control. If there are multiple boards, each board can be interconnected to increase processing capacity. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processing at the same time. Device.
- the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and the program includes part or all of the steps of any method for adjusting the data transmission rate recorded in the above method embodiment when the program is executed.
- An embodiment of the present invention also provides a computer program product, characterized in that the computer program product includes computer program code, and when the computer program code runs on a computer, the computer executes as shown in Figure 4, Figure 10, and Figure 12. The method described.
- the disclosed device may be implemented in other ways.
- the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
- the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable memory.
- the technical solution of the present invention essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, A number of instructions are included to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.
- the aforementioned memory includes: U disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.
- the program can be stored in a computer-readable memory, and the memory can include: a flash disk , Read-only memory (English: Read-Only Memory, abbreviation: ROM), random access device (English: Random Access Memory, abbreviation: RAM), magnetic disk or optical disk, etc.
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Abstract
本发明公开了一种信号发送和处理方法及装置,其中方法包括:终端设备生成信道探测参考信号SRS,并向目标基站发送所述SRS;目标基站根据接收到的SRS跟踪所述终端设备的上行定时位置,所述上行定时位置变化范围不小于1个SRS符号长度。采用本发明实施例的方案能够有效增加SRS符号长度和可检测的上行定时位置变化范围,提升对终端设备的上行定时位置和频偏的跟踪效果。
Description
本申请要求于2019年9月30日提交中国知识产权局、申请号为201910945860.5、申请名称为“信号发送和处理方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本发明涉及终端领域,尤其涉及一种信号发送和处理方法及装置。
未来的5G及其演进网络不仅需要满足各行各业的业务需求,还需要提供更广的业务覆盖。卫星移动通信相比于地面蜂窝移动通信具有巨大优势,其通信距离远、覆盖面积大、通信频带宽,可以为用户提供任何时间、任何地点的通信服务。因此,卫星移动通信的应用前景非常广阔,特别是在国际国内通信、应急救灾等方面具有独特优势。
根据卫星的轨道高度,可以将卫星移动通信系统分为同步轨道(Geostationary Earth Orbit,GEO)系统,中轨(Medium Earth Orbit,MEO)卫星通信系统和低轨(Low Earth Orbit,LEO)卫星通信系统。
无论是地面蜂窝移动通信系统还是卫星移动通信系统,基站和终端之间为了实现正常通信,首先需要利用下行和上行同步信号在终端侧和基站侧分别进行初始定时和频偏估计,使终端能够成功接入网络;在网络连接期间,基站和终端还需要持续跟踪定时和频偏的变化,来保证上下行同步和通信数据的正确传输。
为了维持网络连接阶段的正常通信,基站和终端需要跟踪上行定时位置和上行频偏的变化。上行数据、控制信息及解调参考信号(DeModulation Reference Signal,DMRS)可用于特定终端的上行定时提前量和残留频偏值的估计,但是特定终端的上行数据、控制信息及解调参考信号的传输依赖基站调度,可能出现某段时间内没有任何该终端的上行数据传输的情况。信道探测参考信号(Sounding Reference Signal,SRS)主要用于上行信道质量估计和相关参数测量,该信号不一定需要与上行数据和控制信息一起传输,因此,可以选择利用SRS来跟踪估计特定终端的上行定时位置和频偏。
卫星移动通信系统中,没有全球导航卫星系统(Global Navigation Satellite System,GNSS)定位能力的终端需要采用闭环测量,即终端发送信号、基站测量信号并向终端反馈的方式来进行上行定时位置和频偏跟踪。使用闭环测量方法时,特定终端可以在特定时频资源发送SRS,基站接收SRS后能够获取该终端上行定时位置和频偏变化的信息。
相比地面蜂窝移动通信系统,卫星通信系统有更大的频偏变化率和定时点变化率。对于频偏变化率,设想一个卫星轨道高度为600km的低轨卫星系统,该系统的最大多普勒频偏变化率约为0.25ppm/s,即载频为2GHz时等效频偏变化率0.5kHz/s,载频为30GHz时等效频偏变化率7.5kHz/s,因此低频段或者高频段的子载波间隔(低频段的最小子载波宽度15kHz,高频段的最小子载波宽度60kHz)都能够抵抗这种程度的多普勒频偏,没有必要在现有协议的基础上对SRS做特殊设计。对于定时点变化率,设想如前所述的卫星轨道高度为600km的低轨卫星系统,位于仰角最小处的终端的往返传输时延变化率约为±45us/s,位 于半径为100km的星下覆盖区域两端的终端之间的往返传输时延变化率之差为10us/s,现有协议规定的SRS结构可能无法在所有条件下实现上行定时跟踪功能。
发明内容
本发明实施例提供一种信号发送和处理方法及装置,采用本发明实施例的方案能够有效增加SRS符号长度和可检测的上行定时位置变化范围,提升对终端设备的上行定时位置和频偏的跟踪效果。
第一方面,本发明实施例提供一种信号发送方法,包括:
生成信道探测参考信号SRS;
向目标基站发送所述SRS,其中,所述目标基站能通过接收的所述SRS检测到发送所述SRS的终端设备的上行定时位置变化范围不小于1个SRS符号长度。
可选的,所述SRS由叠加掩码的SRS频域序列经过时域映射获得。
可选的,所述方法还包括生成叠加掩码的SRS频域序列,具体包括:
将SRS频域序列与掩码序列相乘,生成叠加掩码的SRS频域序列。
可选的,所述将SRS频域序列与掩码序列相乘包括将一个SRS频域序列中的一个频域数据与掩码序列的一个元素相乘,对应公式如下:
其中表示叠加掩码的SRS频域序列中的一个频域数据,为SRS频域序列长度。
可选的,其特征在于,在所述生成信道探测参考信号SRS之前,所述方法还包括:
获取预设加掩码形式,并根据所述预设加掩码形式确定SRS频域序列中叠加掩码的位置。
可选的,所述获取预设加掩码形式,包括:
获取索引号,根据所述索引号读取加掩码形式检索表,所述加掩码形式检索表中包括索引号和所述索引号对应的加掩码形式;
根据读取结果确定所述预设加掩码形式。
可选的,所述掩码序列为根据基站相关参数和第一SRS相关参数生成的第一掩码序列,其中所述基站相关参数为目标基站对应的卫星小区或卫星波束的相关参数。
可选的,所述掩码序列为根据终端设备相关参数和第一SRS相关参数生成的第二掩码序列,所述终端设备相关参数包括所述终端设备的小区无线网络临时标识。
可选的,所述掩码序列为根据所述第一SRS相关参数和第二SRS相关参数生成的第三掩码序列,所述第二SRS相关参数用于指示SRS的时频资源。
可选的,在所述生成信道探测参考信号SRS之前,所述方法还包括:
获取所述终端设备需要发送SRS的目标基站的指示参数,所述指示参数用于表征所述目标基站对应的卫星小区或卫星波束的类型;
确定所述指示参数位于可加掩码参数值区间内。
可选的,所述生成信道探测参考信号SRS包括:
获取指示所述SRS子载波宽度的第一指示信令;
根据所述第一指示信令生成SRS。
可选的,所述生成信道探测参考信号SRS包括:
获取所述SRS可支持的发送结构相关的第二指示信令,所述第二指示信令用于指示所述SRS可支持的发送结构包括梳状结构和非梳状结构;
根据所述第二指示信令生成SRS。
第二方面,本发明实施例提供一种信号处理方法,包括:
接收终端设备发送的SRS;
根据所述SRS跟踪所述终端设备的上行定时位置,所述上行定时位置变化范围不小于1个SRS符号长度。
可选的,所述SRS由叠加掩码的SRS频域序列经过时域映射获得,所述根据所述SRS跟踪所述终端设备的上行定时位置,包括:
获取与所述SRS对应的掩码序列,并根据所述掩码序列对所述叠加掩码的SRS频域序列进行解码,获取所述SRS中的频域数据;
根据所述频域数据跟踪所述终端设备的上行定时位置。
可选的,在获取与所述SRS对应的掩码序列之前,所述方法还包括:
获取预设加掩码形式,并根据所述预设加掩码形式确定对所述SRS进行解码的位置。
可选的,在所述接收终端设备发送的SRS之前,所述方法还包括:
向所述终端设备发送第一指示信令,所述第一指示信令用于指示SRS子载波宽度。
可选的,在所述接收终端设备发送的SRS之前,所述方法还包括:
向所述终端设备发送第二指示信令,所述第二指示信令用于指示SRS可支持的发送结构包括梳状结构和非梳状结构。
第三方面,本发明实施例提供了一种信号发送装置,所述装置包括:
处理单元,生成信道探测参考信号SRS;
输出单元,向目标基站发送所述SRS,其中,所述目标基站能通过接收的所述SRS检测到发送所述SRS的终端设备的上行定时位置变化范围不小于1个SRS符号长度。
可选的,所述SRS由叠加掩码的SRS频域序列经过时域映射获得。
可选的,所述装置包括生成单元,用于生成叠加掩码的SRS频域序列,具体用于:
将SRS频域序列与掩码序列相乘,生成叠加掩码的SRS频域序列。
可选的,所述将SRS频域序列与掩码序列相乘包括将一个SRS频域序列中的一个频域数据与掩码序列的一个元素相乘,对应公式如下:
其中表示叠加掩码的SRS频域序列中的一个频域数据,为SRS频域序列长度。
可选的,所述装置还包括预设单元,用于:
在所述生成信道探测参考信号SRS之前,获取预设加掩码形式,并根据所述预设加掩码形式确定SRS频域序列中叠加掩码的位置。
可选的,所述获取预设加掩码形式,包括:
获取索引号,根据所述索引号读取加掩码形式检索表,所述加掩码形式检索表中包括索引号和所述索引号对应的加掩码形式;
根据读取结果确定所述预设加掩码形式。
可选的,所述掩码序列为根据基站相关参数和第一SRS相关参数生成的第一掩码序列,其中所述基站相关参数为目标基站对应的卫星小区或卫星波束的相关参数。
可选的,所述掩码序列为根据终端设备相关参数和第一SRS相关参数生成的第二掩码序列,所述终端设备相关参数包括所述终端设备的小区无线网络临时标识。
可选的,所述掩码序列为根据所述第一SRS相关参数和第二SRS相关参数生成的第三掩码序列,所述第二SRS相关参数用于指示SRS的时频资源。
可选的,所述装置还包括指示单元,用于:
在所述生成信道探测参考信号SRS之前,获取所述终端设备需要发送SRS的目标基站的指示参数,所述指示参数用于表征所述目标基站对应的卫星小区或卫星波束的类型;
确定所述指示参数位于可加掩码参数值区间内。
可选的,在生成信道探测参考信号SRS方面,所述装置具体用于:
获取指示所述SRS子载波宽度的第一指示信令;
根据所述第一指示信令生成SRS。
可选的,在生成信道探测参考信号SRS方面,所述装置具体用于:
获取所述SRS可支持的发送结构相关的第二指示信令,所述第二指示信令用于指示所述SRS可支持的发送结构包括梳状结构和非梳状结构;
根据所述第二指示信令生成SRS。
第四方面,本发明实施例提供了一种信号处理装置,所述装置包括:
接收单元,用于接收终端设备发送的SRS;
跟踪单元,用于根据所述SRS跟踪所述终端设备的上行定时位置,所述上行定时位置变化范围不小于1个SRS符号长度。
可选的,所述SRS由叠加掩码的SRS频域序列经过时域映射获得,所述跟踪单元具体用于:
获取与所述SRS对应的掩码序列,并根据所述掩码序列对所述叠加掩码的SRS频域序列进行解码,获取所述SRS中的频域数据;
根据所述频域数据跟踪所述终端设备的上行定时位置。
可选的,在获取与所述SRS对应的掩码序列之前,所述跟踪单元还用于:
获取预设加掩码形式,并根据所述预设加掩码形式确定对所述SRS进行解码的位置。
可选的,在所述接收终端设备发送的SRS之前,所述接收单元还用于:
向所述终端设备发送第一指示信令,所述第一指示信令用于指示SRS子载波宽度。
可选的,在所述接收终端设备发送的SRS之前,所述接收单元还用于:
向所述终端设备发送第二指示信令,所述第二指示信令用于指示SRS可支持的发送结构包括梳状结构和非梳状结构。
第五方面,本发明实施例提供了一种计算机可读存储介质,包括指令,当其在计算机上运行时,使得计算机执行如第一方面任一所述的方法,或者,执行如第二方面任一项所述的方法。
第六方面,本发明实施例提供了一种计算机程序产品,其特征在于,所述计算机程序产品包括计算机程序代码,当所述计算机程序代码在计算机上运行时,使得计算机执行如 第一方面任一所述的方法,或者,执行如第二方面任一项所述的方法。
第七方面,本发明实施例提供了一种通信装置,包括:输入接口电路,逻辑电路和输出接口电路,其中,所述逻辑电路,用于执行如第一方面任一所述的方法,或者,执行如第二方面任一项所述的方法。
可以看出,在本发明实施例的方案中,首先终端设备生成信道探测参考信号SRS,并向目标基站发送所述SRS;目标基站接收终端设备发送的SRS,并根据SRS跟踪终端设备的上行定时位置,其中上行定时位置变化范围不小于1个SRS符号长度。在这个过程中,生成的SRS能够有效增加SRS符号长度和可检测的上行定时位置变化范围,提升对终端设备的上行定时位置和频偏的跟踪效果。
本发明的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍。
图1为本发明实施例提供的一种卫星通信场景与架构示意图;
图2为本发明实施例提供的一种基站无法区分两个终端的上行定时位置的示意图;
图3为本发明实施例提供的另一种基站无法区分两个终端的上行定时位置的示意图;
图4为本发明实施例提供的一种信号发送和处理方法流程示意图;
图5为本发明实施例提供的一种传统SRS的多用户上行定时位置检测结果示意图;
图6为本申请实施例提供的另一种传统SRS的多用户上行定时位置检测结果示意图;
图7为本申请实施例提供的一种启用SRS掩码的指示标记示意图;
图8为本申请实施例提供的一种叠加掩码的SRS的多用户上行定位位置检测结果示意图;
图9为本发明实施例提供的另一种叠加掩码的SRS的多用户上行定位位置检测结果示意图;
图10为本发明实施例提供的另一种信号发送和处理方法流程示意图;
图11为本申请实施例提供的一种设置子载波宽度的指示信令示意图;
图12为本申请实施例提供了另一种信号发送和处理方法流程示意图;
图13A为本申请实施例提供的一种发送梳参数为2时的子载波示意图;
图13B为本申请实施例提供的另一种发送梳参数为4时的子载波示意图;
图14为本申请实施例提供的一种设置支持束状结构指示信令示意图;
图15为本申请实施例提供的一种信号发送装置结构示意图;
图16为本申请实施例提供的一种信号处理装置结构示意图;
图17为本发明实施例提供的一种装置的结构示意图;
图18为本发明实施例提供的一种网络设备的结构示意图。
为了使本技术领域的人员更好地理解本发明方案,下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案说明。
首先对本发明实施例的适应场景进行说明。
请参阅图1,图1为本申请实施例提供的一种卫星通信场景与架构示意图,如图1所示的卫星具备信号处理能力,或者卫星将终端设备信号透明转发到地面站实现广域覆盖。在这个过程中采用与现有3GPP LTE/NR兼容的协议栈。终端设备为普通的移动终端或专用终端,传输过程也遵循LTE/NR协议。终端设备可以在特定时频资源发送SRS,基站接收SRS后能够获取该终端设备上行定时位置和频偏变化的信息。
传统LTE/NR协议规定的SRS序列按如下方式生成:在物理层的资源映射过程中,SRS频域序列依据相关参数分配的时频位置,映射到对应的频域资源上,然后通过快速傅里叶逆变换(Inverse Fast Fourier Transform,IFFT)生成时域符号。
其中,
为频域序列中的一个频域数据,
为SRS的频域序列长度(即占用的子载波数);m表示SRS占用的资源块(Resource Block,RB)数,范围为
指当前带宽下最大的上行RB数;
表示一个RB占用的子载波数12;系数δ的计算式为δ=log
2(K
TC),K
TC为SRS的梳参数,表示SRS序列在频域上是每隔(K
TC-1)个子载波映射的。
另一方面,参数α用来表示SRS的循环移位,定义如下:
当M
ZC={6,12,18,24}时,基序列为特殊的基于正交相移键控(Quadrature Phase Shift Keying,QPSK)生成的序列,公式如下:
当M
ZC=30时,基序列的生成方式为:
当M
ZC≥36时,基序列的生成方式为:
其中,
N
ZC是满足N
ZC<M
ZC的最大质数。
按上述方式生成的SRS序列根据基站指示的配置信息映射到相应时频资源时,除了间隔子载波映射的梳状复用,以及时域循环移位的码分复用形式,还会通过时域复用、频域复用和符号复用等方式,来提高资源利用率。
SRS使用了梳状复用,即SRS频域子载波宽度为上行数据子载波的K
TC倍,SRS时域符号的长度为上行数据符号的1/K
TC,1个上行数据符号相当于包含了K
TC个重复的SRS符号;SRS使用了码分复用,即使用相同时频资源的SRS可以复用同一基序列的不同循环移位形式。梳状复用和码分复用这两种复用形式,虽然提高了时频资源利用率,但是也限制了按一定时间间隔发送的SRS可估计的上行定时位置范围,导致当前协议规定的SRS结构不能够满足部分卫星通信场景的上行定时位置跟踪需求。
SRS可以使用码分复用形式,即映射到相同时频资源的SRS可以复用不同循环移位值的同一基序列,而卫星通信系统的定时变化率较大,因此某个终端两次传输SRS时间间隔内的上行定时位置的变化可能超出循环移位间隔,令基站无法分辨该终端与其它终端的上行定时点位置。循环移位的限制,导致基站能够分辨的某个终端两次传输SRS时间间隔内的上行定时位置变化不能达到1个SRS符号长度。
具体地,当一个卫星小区(或者一个卫星波束)内的终端之间的往返传输时延变化率(等效于上行定时变化率)的差异较大、两次SRS传输的时间间隔较长时,基站检测到的使用同一基序列、不同时域循环移位值的两个终端的上行定时位置可能在同一段循环移位限制范围内。请参阅图2,图2为本申请实施例提供的一种基站无法区分两个终端的上行定时位置的示意图,如图2所示,T0时刻,终端1的定时位置位于窗①,终端2的定时位置位于窗③;T1时刻,终端1和2的变化后的定时位置都在窗②内,从而令基站难以分辨两个终端各自的定时位置。
当一个卫星小区(或者一个卫星波束)内的终端的往返传输时延变化率较大、两次SRS传输的时间间隔较长时,基站检测到的该终端的上行定时位置可能出现在其他终端的循环移位限制范围内。请参阅图3,图3为本申请实施例提供的另一种基站无法区分两个终端的上行定时位置的示意图,如图3所示,T0时刻,终端1的定时位置位于窗①;T1时刻,终端1和2的变化后的定时位置都在窗②内,从而令基站难以分辨两个终端各自的定时位置。
考虑循环移位值对定时位置估计的限制,SRS使用不同梳参数及相应循环移位值,在不 同子载波条件下,基站可区分的不同终端各自的最大定时位置变化范围如表1所示。
表1 终端使用不同配置的SRS基站可分辨的终端最大定时位置变化范围
针对图2所述的场景(假设两个终端的往返传输时延变化率之差为10us/s)和图3所述的场景(假设某终端的往返传输时延变化率为45us/s),为了避免超出如表1所述的可检测的最大定时位置变化范围,基站要求的各终端的SRS传输周期上限如表2所示。
表2 基站要求的终端的SRS传输周期上限
为了满足表2各条件的上行定时跟踪的需要,SRS必须以较小的周期频繁发送,这样将会对资源造成较大的开销。
另一方面,SRS可以使用梳状复用形式,即SRS频域子载波宽度相比于上行数据子载波宽度更大,SRS时域符号长度相比于上行数据符号长度更短。当卫星通信系统的定时变化率较大时,某个终端两次传输SRS的时间间隔内的上行定时位置变化可能超过1个SRS符号,此时基站在检测上行定时位置时会发生以SRS符号为间隔的定时点检测模糊问题。
位于卫星覆盖区域仰角最小处的终端的往返传输时延变化率较大,设该终端的往返传输时延变化率为45us/s,若SRS以320ms为周期发送,两次SRS传输时间间隔内的上行定时位置变化为14.4us,当前SRS无法支持表3中下划线标示条件的上行定时位置检测。
表3 不同配置的SRS符号长度
子载波(kHz) | SRS符号长度(K TC=2) | SRS符号长度(K TC=4) |
15 | 33.33us | 16.67us |
30 | 16.67us | 8.33us |
60 | 8.33us | 4.16us |
120 | 4.16us | 2.08us |
卫星通信系统,尤其是低轨卫星通信系统的上行定时变化率较大,基站侧无法利用传统的SRS结构,实现1个及多个SRS符号长度的上行定时位置变化的检测,因此无法满足所有场景的上行定时跟踪需求。因此有必要对SRS进行增强设计,当终端的上行定时位置变化为1个或多个现有SRS符号长度时,基站能够区分发送增强SRS序列的不同终端各自的上行定时位置,以满足卫星通信系统的上行定时跟踪需求。
基于上述描述,请参阅图4,图4为本申请实施例提供了一种信号发送和处理方法流程示意图,如图4所示,该方法具体包括如下步骤:
101、终端设备生成信道探测参考信号SRS,并向目标基站发送所述SRS,其中,所述SRS由叠加掩码的SRS频域序列经过时域映射获得。
传统的SRS频域序列的生成方式为:
因为每个处于网络连接阶段的终端都在以一定密度向基站发送SRS,因此SRS的时频资源开销很大。出于尽量降低资源开销的考虑,引入SRS的码分复用形式,SRS可容忍的各终端的上行定时位置变化范围为
个SRS符号;卫星通信系统普遍存在较大的定时变化率,这种码分复用因存在循环移位的限制,导致基站可能无法区分使用同一基序列、不同循环移位的SRS序列,并在相同时频资源传输SRS的不同终端。
举一个具体例子来说明码分复用因存在循环移位限制,导致基站无法区分在相同时频资源传输同一基序列、不同循环移位的SRS序列的不同终端的情况。假设终端1~8在相同的时频资源传输由同一基序列的不同循环移位生成的SRS,所有终端的梳参数均为2,终端1~8使用的循环移位参数α依次为{0,2π/8,2π·2/8,2π·3/8,2π·4/8,2π·5/8,2π·6/8,2π·7/8}。请参阅图5,图5为本申请实施例提供的一种传统SRS的多用户上行定时位置检测结果示意图,某时刻T0,各终端发送的SRS同时到达基站,基站检测到的各终端的峰值位置如图5所示,需要说明的是,各终端定时点对应的峰值位置是为了方便说明人为标示,基站实际只能检测到存在8处能量峰值。请参阅图6,图6为本申请实施例提供的另一种传统SRS的多用户上行定时位置检测结果示意图,某时刻T1,各终端第二次发送的SRS又同时到达基站,基站检测到各终端的峰值位置如图6所示,此时各终端的上行定时位置均已发生变化,每个终端的上行定时位置均延迟了1个循环移位的长度,但是在基站看来图6中8处能量峰值的位置与图5几乎没有差别,此时基站无法区分各终端定时点的变化。
针对此,本申请实施例中终端设备生成的SRS频域序列为叠加掩码的SRS频域序列。具体地,掩码是一串二进制代码对目标字段进行异或运算,屏蔽当前的输入位,掩码序列 是多个掩码元素组成的序列。掩码序列的主要作用是令基站能够区分使用同一基序列的不同循环移位作为SRS序列、在相同时频资源传输SRS的不同终端设备。叠加掩码的SRS序列通过在频域加掩码,将基站可检测的各终端的上行定时位置变化范围扩展到1个SRS符号。
终端生成叠加掩码的SRS频域序列后,依据目标基站下发的相关参数,将叠加掩码的SRS频域序列映射到对应的时频资源上,然后利用快速傅里叶逆变换(Inverse Fast Fourier Transform,IFFT)生成时域符号即最终的SRS,并向目标基站发送SRS。其中目标基站即是指与终端设备进行通信的基站。
SRS频域序列加掩码时,将频域数据与掩码序列相乘,来改变频域数据相位。SRS频域序列与掩码相乘有多种形式:例如SRS频域数据的实部和虚部可以分别与掩码序列的c(2n)和c(2n+1)两个不同元素相乘,或者1个SRS频域数据作为整体与掩码序列的一个元素c(n)相乘,或者N个SRS频域数据作为整体与掩码序列的一个元素c(n)相乘。
在选取掩码的时候,基于性能优化和降低用户间干扰的考虑,需要选择具有较好的自相关性和互相关性的序列作为掩码序列。掩码序列可选择使用m序列、M序列、Gold序列等常用的伪随机序列形式。掩码序列中的元素为1、-1或者为1、-1的缩放值。
掩码序列可以是一个全网通用的序列,例如,SRS梳参数2对应的8个循环移位值和梳参数4对应的12个循环移位值都有对应的固定掩码序列,掩码序列只和梳参数、相应循环移位值有关,所有基站和终端约定使用包含相同元素的掩码序列;掩码序列可以是一个卫星小区(或者卫星波束)通用的序列,该序列的生成与至少一个卫星小区(或者卫星波束)特定参数,以及梳参数、相应循环移位值相关,卫星小区(或者卫星波束)特定参数可以是卫星小区(或者卫星波束)索引号,带宽部分(Bandwidth Part,BWP)索引号,同步信号块(Synchronization Signal Block,SSB)索引号等等;掩码序列可以是一个终端特定的序列,该序列的生成与至少一个终端特定参数,以及梳参数、相应循环移位值相关,终端特定参数可以是终端的小区无线网络临时标识(Cell-Radio Network Temporary Identifier,C-RNTI)等等;掩码序列也可以是一个与SRS映射的时频资源相关的序列,该序列的生成与至少一个SRS时频资源相关参数,以及梳参数、相应循环移位值相关,SRS时频资源参数包括时频资源的符号索引、时隙号索引、频域资源索引等等。
举例一种叠加掩码的SRS频域序列及其掩码的生成形式。以31级Gold序列为例,生成掩码序列c(n):
x
1(n+31)=(x
1(n+3)+x
1(n))mod2
x
2(n+31)=(x
2(n+3)+x
2(n+2)+x
2(n+1)+x
2(n))mod2
其中,N
C=1600,x
1(0)=1,x
1(n)=0,n=1,2,...,30;x
2(n)是m序列,生成m序列的种子为:
掩码序列是与卫星小区(或者卫星波束)索引号,以及梳参数、相应循环移位值相关的序列。组成掩码序列的m序列的种子由卫星小区(或者卫星波束)索引号、SRS的循环移位参数按一定运算规则获得。m序列种子的生成方式为:
利用上述种子及Gold序列生成规则产生掩码序列c(n)。终端侧和基站侧约定以1个SRS频域数据作为整体与掩码序列的一个元素c(n)相乘,则生成的掩码序列长度至少为M
ZC。SRS频域序列加掩码后,映射到SRS时频资源的相应子载波,终端侧通过IFFT生成最终发送的时域数据。
另外,并不是所有卫星小区(或者卫星波束)都需要使用给SRS频域序列加掩码的方式来抵抗上行定点变化率快的影响,SRS频域序列加掩码的方式在靠近星下点的卫星小区(或者卫星波束)和靠近覆盖区域边缘的卫星小区(或者卫星波束)能起到更大的作用,而在其它卫星小区(或者卫星波束)中可能几乎没有作用。因此,可以在卫星小区(或者卫星波束)之间采用不同的配置参数,根据配置参数确定是否启用SRS掩码功能:可以对卫星小区(或者卫星波束)级指示参数进行划分,当参数处于某段区间时不启用掩码加扰方式,参数划分的方式是基站与终端约定的,或者是由基站在广播信息中下发的,其中,指示参数包括多普勒频偏值、公共往返传输时延、公共往返传输时延变化率、波束角度等等,这些指示参数为卫星小区(或者卫星波束)内某参考点的对应参数,或者是某参考点对应参数加上一个偏移值;或者可以在广播信息、目标基站的无线资源控制(Radio Resource Control,RRC)信息等增加1个启用SRS掩码的指示标记,请参阅图7,图7为本申请实施例提供的一种启用SRS掩码的指示标记示意图,如图7所示,可以在RRC的SRS配置信令中增加1个是否启用SRS掩码的信令。或者是在触发SRS传输的下行控制信息(Downlink Control Information,DCI)或媒体接入控制Media Access Control element MAC CE信令中增加1个是否启用SRS掩码的信令。
102、目标基站获取与接收到的所述SRS对应的掩码序列,并根据所述掩码序列对所述叠加掩码的SRS频域序列进行解码,获取所述SRS中的频域数据。
目标基站接收到终端发送的信号后,使用本地掩码序列集合中的c(n)与SRS频域序列的M
ZC个子载波一一对齐,按照与终端相同的加掩码方式,来恢复SRS频域数据。
终端侧频域数据加掩码与基站侧频域数据解掩码的形式需一致。收发端加、解掩码的形式可以是终端与基站的约定方式,也可以是基站指示的方式,基站指示时需通过系统消息块SIB1(System Information Block Type1)、其他系统消息(Other System Information,OSI)、 管理信息库(MIB,Management Information Base)等的广播信息中的至少一种向终端传输加掩码形式的指示信息。基站可以使用一个如表4所示的指示形式索引表中的索引号,向终端指示加掩码的形式,索引表是终端与基站约定的,或者是基站在广播信息中下发的。
表4 指示形式索引表
索引号 | 指示形式 |
0 | 频域数据实部、虚部分别加掩码 |
1 | 1个频域数据整体加掩码 |
… | … |
n | n个频域数据整体加掩码 |
103、目标基站根据所述频域数据跟踪所述终端设备的上行定时位置。
目标基站根据本地掩码序列恢复SRS频域数据后,利用SRS频域数据和相应算法,估计终端的上行信道质量,并检测上行定时位置、残留频偏值等参数。
具体地,使用与前述相同的例子来说明使用掩码加扰后,基站能够区分在相同时频资源传输同一基序列、不同循环移位的SRS序列的不同终端。类似地,假设终端1~8在相同的时频资源传输由同一基序列的不同循环移位生成的SRS,所有终端的梳参数均为2,终端1~8使用的循环移位参数α依次为{0,2π/8,2π·2/8,2π·3/8,2π·4/8,2π·5/8,2π·6/8,2π·7/8},每个终端对SRS频域序列加扰时使用互不相同的掩码序列。请参阅图8,图8为本申请实施例提供的一种叠加掩码的SRS的多用户上行定位位置检测结果示意图,某时刻T0,各终端发送的SRS同时到达基站,基站用每个终端各自的掩码序列分别解扰,检测到终端3的峰值位置如图7所示(这里以终端3为例,其它终端的检测结果类似终端3)。请参阅图9,图9为本申请实施例提供的另一种叠加掩码的SRS的多用户上行定位位置检测结果示意图,某时刻T1,各终端第二次发送的SRS又同时到达基站,基站同样使用不同终端各自的掩码序列分别解扰,检测到终端3的峰值位置如图8所示(其它终端检测结果类似)。从图8-图9的检测结果来看,通过对SRS频域序列加扰,基站检测时进行相应的解扰处理,可以区分各终端的上行定时位置,从而扩大上行定时位置变化的检测范围。
可见,在本申请实施例中,通过给SRS频域序列加掩码的方式,扩大了使用相同时频资源、相同基序列的不同循环移位序列的发送SRS的各终端的可检测的上行定时位置变化范围,将终端的可检测的上行定时变化范围扩大到1个SRS符号,以满足卫星通信系统的定时跟踪需求。
请参阅图10,图10为本申请实施例提供了另一种信号发送和处理方法流程示意图,如图10所示,该方法具体包括如下步骤:
201、目标基站向终端设备发送指示SRS子载波宽度的第一指示信令;
202、终端设备根据接收到的所述第一指示信令生成SRS。
203、终端设备向目标基站发送所述SRS。
通常情况下,通过RRC的BWP配置信令统一指示上行数据及参考信号的子载波宽度, BWP内不支持SRS使用专用的子载波宽度,由于SRS在频域上采用梳状映射的方式,SRS的实际子载波宽度大于数据子载波,因此SRS符号长度比数据符号短,可测量的定时范围也较小。为了增加SRS符号长度,扩展可检测的上行定时位置变化范围,可以令SRS能够选择比数据符号更小的子载波宽度,来增加可检测的上行定时位置变化范围。
具体地,可以选择RRC、广播信息中增加SRS子载波宽度的指示信令。例如,请参阅图11,图11为本申请实施例提供的一种设置子载波宽度的指示信令示意图,可以选择在RRC信令的终端级SRS参数配置(SRS-Config)中增加SRS专用子载波宽度的指示信令。
可见,在本申请实施例中,通过使用专用指示信令为SRS配置专用子载波,令SRS的频域映射更加密集,从而增加了SRS时域符号长度和可检测的上行定时位置变化范围。
请参阅图12,图12为本申请实施例提供了另一种信号发送和处理方法流程示意图,如图12所示,该方法具体包括如下步骤:
301、目标基站向终端设备发送第二指示信令,所述第二指示信令用于指示SRS可支持的发送结构包括梳状结构和非梳状结构;
302、终端设备根据接收到的所述第二指示信令生成SRS。
303、终端设备向目标基站发送所述SRS。
传统情况下规定SRS在频域上采用梳状(Comb)映射方式,即对于单个终端设备,在频域上,每N个子载波发送SRS。其中发送梳参数transmissionComb支持配置N=2或N=4。请参阅图13A,图13A为本申请实施例提供的一种发送梳参数为2时的子载波示意图,如图13A所示,每一个竖行矩阵表示一个数据符号子载波,每2个子载波发送一个SRS。SRS在频域上采用1/2子载波间隔映射,一个数据符号包含了2个重复SRS符号。
或者,请参阅图13B,图13B为本申请实施例提供的另一种发送梳参数为4时的子载波示意图,如图13B所示,每一个竖行矩阵表示一个数据符号子载波,每4个子载波发送一个SRS,SRS在频域上采用1/4子载波间隔映射,一个数据符号包含了4个重复SRS符号。
另外,对终端设备来说,确定发送梳密度(梳参数)后,还需要配置发送梳偏置combOffset,N=2时combOffset-n2为{0,1},N=4时combOffset-n4为{0,1,2,3,}。不同终端设备可以配置的不同梳偏置参数,来实现不同子载波的频分复用。
上述梳状结映射导致SRS检测到的定时位置偏移为1/2或1/4数据符号长度时,会产生定时点的检测模糊,即目标基站无法确定整数个SRS符号的定时边界。为了保证在这种情况下基站也能正确检测定时位置的变化,可以通过改变SRS的发送结构,增加SRS符号的长度,从而使基站利用SRS能检测到更大的上定时位置变化范围。
具体地,可以在SRS支持梳状结构的前提下,增加SRS能够支持非梳状结构的设置。可以选择在RRC信息、广播信息中增加SRS支持非梳状结构的指示信令。请参阅图14,图14为本申请实施例提供的一种设置支持束状结构指示信令示意图,如图14所示,可以选择在RRC信令的终端级SRS资源配置(SRS-Resource)中增加SRS非梳状结构Comb n1的指示信令。
可见,在本申请实施例中,令SRS支持非梳状结构,即变相减小了SRS的子载波宽度, 从而增加了SRS符号长度和终端可检测的上行定时位置变化范围。
请参阅图15,图15为本申请实施例提供的一种信号发送装置结构示意图,如图15所示,所述装置400包括:
处理单元401,用于生成信道探测参考信号SRS;
输出单元402,用于向目标基站发送所述SRS,其中,所述目标基站能通过接收的所述SRS检测到发送所述SRS的终端设备的上行定时位置变化范围不小于1个SRS符号长度。
在一个可能的示例中,所述SRS由叠加掩码的SRS频域序列经过时域映射获得。
在一个可能的示例中,所述处理单元401用于生成叠加掩码的SRS频域序列,具体用于:
将SRS频域序列与掩码序列相乘,生成叠加掩码的SRS频域序列。
在一个可能的示例中,所述装置还包括预设单元403,用于:
在所述生成信道探测参考信号SRS之前,获取预设加掩码形式,并根据所述预设加掩码形式确定SRS频域序列中叠加掩码的位置。
在一个可能的示例中,所述获取预设加掩码形式,包括:
获取索引号,根据所述索引号读取加掩码形式检索表,所述加掩码形式检索表中包括索引号和所述索引号对应的加掩码形式;
根据读取结果确定所述预设加掩码形式。
在一个可能的示例中,所述掩码序列为根据基站相关参数和第一SRS相关参数生成的第一掩码序列,其中所述基站相关参数为目标基站对应的卫星小区或卫星波束的相关参数。
在一个可能的示例中,所述掩码序列为根据终端设备相关参数和第一SRS相关参数生成的第二掩码序列,所述终端设备相关参数包括所述终端设备的小区无线网络临时标识。
在一个可能的示例中,所述掩码序列为根据所述第一SRS相关参数和第二SRS相关参数生成的第三掩码序列,所述第二SRS相关参数用于指示SRS的时频资源。
在一个可能的示例中,所述装置还包括指示单元404,用于:
在所述生成信道探测参考信号SRS之前,获取所述终端设备需要发送SRS的目标基站的指示参数,所述指示参数用于表征所述目标基站对应的卫星小区或卫星波束的类型;
确定所述指示参数位于可加掩码参数值区间内。
在一个可能的示例中,在生成信道探测参考信号SRS方面,所述处理单元401具体用 于:
获取指示所述SRS子载波宽度的第一指示信令;
根据所述第一指示信令生成SRS。
在一个可能的示例中,所述处理单元401具体用于:
获取所述SRS可支持的发送结构相关的第二指示信令,所述第二指示信令用于指示所述SRS可支持的发送结构包括梳状结构和非梳状结构;
根据所述第二指示信令生成SRS。
请参阅图16,图16为本申请实施例提供的一种信号处理装置结构示意图,如图16所示,该装置包括:
接收单元501,用于接收终端设备发送的SRS;
跟踪单元502,用于根据所述SRS跟踪所述终端设备的上行定时位置,所述上行定时位置变化范围不小于1个SRS符号长度。
在一个可选的示例中,所述SRS由叠加掩码的SRS频域序列经过时域映射获得,所述跟踪单元502具体用于:
获取与所述SRS对应的掩码序列,并根据所述掩码序列对所述叠加掩码的SRS频域序列进行解码,获取所述SRS中的频域数据;
根据所述频域数据跟踪所述终端设备的上行定时位置。
在一个可选的示例中,在获取与所述SRS对应的掩码序列之前,所述跟踪单元还用于:
获取预设加掩码形式,并根据所述预设加掩码形式确定对所述SRS进行解码的位置。
在一个可选的示例中,在所述接收终端设备发送的SRS之前,所述接收单元501还用于:
向所述终端设备发送第一指示信令,所述第一指示信令用于指示SRS子载波宽度。
在一个可选的示例中,在所述接收终端设备发送的SRS之前,所述接收单元501还用于:
向所述终端设备发送第二指示信令,所述第二指示信令用于指示SRS可支持的发送结构包括梳状结构和非梳状结构。
需要说明的是,上述处理单元401和输出单元402用于执行上述方法步骤101~步骤103、步骤201~步骤203和步骤301~步骤303终端设备侧的相关步骤。接收单元501和跟踪单元502用于执行上述方法步骤101~步骤103、步骤201~步骤203和步骤301~步骤303目标基站侧的相关步骤。
在本实施例中,装置400和装置500是以单元的形式来呈现。这里的“单元”可以指特定应用集成电路(application-specific integrated circuit,ASIC),执行一个或多个软件或固件程序的处理器和存储器,集成逻辑电路,和/或其他可以提供上述功能的器件。
如图17所示,装置400可以以图17中的结构来实现,该装置600包括至少一个处理器601,至少一个存储器602,还可以包括射频电路603、天线604以及输入输出装置605。其中,处理器601可用于对通信协议以及通信数据进行处理,还可以用于对终端设备进行 控制,执行软件程序,处理软件程序的数据等。该终端设备还可以包括存储器602,存储器602主要用于存储软件程序和数据,这些涉及的程序可以在该通信装置出厂时即装载再存储器中,也可以在后期需要的时候再装载入存储器。射频电路603主要用于基带信号与射频信号的转换以及对射频信号的处理。天线604主要用于收发电磁波形式的射频信号。输入输出装置,例如触摸屏、显示屏,键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是,有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时,处理器对待发送的数据进行基带处理后,输出基带信号至射频电路,射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时,射频电路通过天线接收到射频信号,将射频信号转换为基带信号,并将基带信号输出至处理器,处理器将基带信号转换为数据并对该数据进行处理。为便于说明,图14中仅示出了一个存储器和处理器。在实际的终端设备产品中,可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置,也可以是与处理器集成在一起,本申请实施例对此不做限制。
处理器601可以是通用中央处理器(CPU),微处理器,特定应用集成电路(application-specific integrated circuit,ASIC),或一个或多个用于控制以上方案程序执行的集成电路。
存储器602可以是只读存储器(read-only memory,ROM)或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器(random access memory,RAM)或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory,EEPROM)、只读光盘(Compact Disc Read-Only Memory,CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。存储器可以是独立存在,通过总线与处理器相连接。存储器也可以和处理器集成在一起。
其中,所述存储器602用于存储执行以上方案的应用程序代码,并由处理器601来控制执行。所述处理器601用于执行所述存储器602中存储的应用程序代码。
存储器602存储的代码可执行以上提供的信号处理方法,比如:生成信道探测参考信号SRS;向目标基站发送所述SRS,其中,所述目标基站能通过接收的所述SRS检测到发送所述SRS的终端设备的上行定时位置变化范围不小于1个SRS符号长度。
图18示出了一种简化的网络设备的结构示意图。网络设备包括射频信号收发及转换部分以及92部分,该射频信号收发及转换部分又包括接收单元91部分和发送单元93部分(也可以统称为收发单元)。射频信号收发及转换部分主要用于射频信号的收发以及射频信号与基带信号的转换;92部分主要用于基带处理,对网络设备进行控制等。接收单元91也可以称为接收器、接收机、接收电路等,发送单元93也可以称为发送器、发射器、发射机、发射电路等。92部分通常是网络设备的控制中心,通常可以称为处理单元,用于控制网络设备执行上述图4、图10、图12中关于目标基站所执行的步骤。具体可参见上述相关部分 的描述。
92部分可以包括一个或多个单板,每个单板可以包括一个或多个处理器和一个或多个存储器,处理器用于读取和执行存储器中的程序以实现基带处理功能以及对网络设备的控制。若存在多个单板,各个单板之间可以互联以增加处理能力。作为一中可选的实施方式,也可以是多个单板共用一个或多个处理器,或者是多个单板共用一个或多个存储器,或者是多个单板同时共用一个或多个处理器。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
本发明实施例还提供一种计算机存储介质,其中,该计算机存储介质可存储有程序,该程序执行时包括上述方法实施例中记载的任何一种数据传输速率的调整方法的部分或全部步骤。
本发明实施例还提供一种计算机程序产品,其特征在于,所述计算机程序产品包括计算机程序代码,当所述计算机程序代码在计算机上运行时,使得计算机执行如图4、图10、图12所述的方法。
需要说明的是,对于前述的各方法实施例,为了简单描述,故将其都表述为一系列的动作组合,但是本领域技术人员应该知悉,本发明并不受所描述的动作顺序的限制,因为依据本发明,某些步骤可以采用其他顺序或者同时进行。其次,本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施例,所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中,对各个实施例的描述都各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中,应该理解到,所揭露的装置,可通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储器中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储器中,包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。 而前述的存储器包括:U盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成,该程序可以存储于一计算机可读存储器中,存储器可以包括:闪存盘、只读存储器(英文:Read-Only Memory,简称:ROM)、随机存取器(英文:Random Access Memory,简称:RAM)、磁盘或光盘等。
以上对本发明实施例进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上上述,本说明书内容不应理解为对本发明的限制。
Claims (37)
- 一种信号发送方法,其特征在于,所述方法包括:生成信道探测参考信号SRS;向目标基站发送所述SRS,其中,所述目标基站能通过接收的所述SRS检测到发送所述SRS的终端设备的上行定时位置变化范围不小于1个SRS符号长度。
- 根据权利要求1所述的方法,其特征在于,所述SRS由叠加掩码的SRS频域序列经过时域映射获得。
- 根据权利要求2所述的方法,其特征在于,所述方法还包括生成叠加掩码的SRS频域序列,具体包括:将SRS频域序列与掩码序列相乘,生成叠加掩码的SRS频域序列。
- 根据权利要求2-4任一项所述的方法,其特征在于,在所述生成信道探测参考信号SRS之前,所述方法还包括:获取预设加掩码形式,并根据所述预设加掩码形式确定SRS频域序列中叠加掩码的位置。
- 根据权利要求5所述的方法,其特征在于,所述获取预设加掩码形式,包括:获取索引号,根据所述索引号读取加掩码形式检索表,所述加掩码形式检索表中包括索引号和所述索引号对应的加掩码形式;根据读取结果确定所述预设加掩码形式。
- 根据权利要求3-6任一项所述的方法,其特征在于,所述掩码序列为根据基站相关参数和第一SRS相关参数生成的第一掩码序列,其中所述基站相关参数为目标基站对应的卫星小区或卫星波束的相关参数。
- 根据权利要求3-6任一项所述的方法,其特征在于,所述掩码序列为根据终端设备相关参数和第一SRS相关参数生成的第二掩码序列,所述终端设备相关参数包括所述终端设备的小区无线网络临时标识。
- 根据权利要求3-6任一项所述的方法,其特征在于,所述掩码序列为根据所述第一SRS相关参数和第二SRS相关参数生成的第三掩码序列,所述第二SRS相关参数用于指示SRS的时频资源。
- 根据权利要求1-9任选一项所述的方法,其特征在于,在所述生成信道探测参考信号SRS之前,所述方法还包括:获取所述终端设备需要发送SRS的目标基站的指示参数,所述指示参数用于表征所述目标基站对应的卫星小区或卫星波束的类型;确定所述指示参数位于可加掩码参数值区间内。
- 根据权利要求1所述的方法,其特征在于,所述生成信道探测参考信号SRS包括:获取指示所述SRS子载波宽度的第一指示信令;根据所述第一指示信令生成SRS。
- 根据权利要求1所述的方法,其特征在于,所述生成信道探测参考信号SRS包括:获取所述SRS可支持的发送结构相关的第二指示信令,所述第二指示信令用于指示所述SRS可支持的发送结构包括梳状结构和非梳状结构;根据所述第二指示信令生成SRS。
- 一种信号处理方法,其特征在于,所述方法包括:接收终端设备发送的SRS;根据所述SRS跟踪所述终端设备的上行定时位置,所述上行定时位置变化范围不小于1个SRS符号长度。
- 根据权利要求13所述的方法,其特征在于,所述SRS由叠加掩码的SRS频域序列经过时域映射获得,所述根据所述SRS跟踪所述终端设备的上行定时位置,包括:获取与所述SRS对应的掩码序列,并根据所述掩码序列对所述叠加掩码的SRS频域序列进行解码,获取所述SRS中的频域数据;根据所述频域数据跟踪所述终端设备的上行定时位置。
- 根据权利要求14所述的方法,其特征在于,在获取与所述SRS对应的掩码序列之前,所述方法还包括:获取预设加掩码形式,并根据所述预设加掩码形式确定对所述SRS进行解码的位置。
- 根据权利要求13所述的方法,其特征在于,在所述接收终端设备发送的SRS之前,所述方法还包括:向所述终端设备发送第一指示信令,所述第一指示信令用于指示SRS子载波宽度。
- 根据权利要求13所述的方法,其特征在于,在所述接收终端设备发送的SRS之前,所述方法还包括:向所述终端设备发送第二指示信令,所述第二指示信令用于指示SRS可支持的发送结构包括梳状结构和非梳状结构。
- 一种信号发送装置,其特征在于,所述装置包括:处理单元,用于生成信道探测参考信号SRS;输出单元,用于向目标基站发送所述SRS,其中,所述目标基站能通过接收的所述SRS检测到发送所述SRS的终端设备的上行定时位置变化范围不小于1个SRS符号长度。
- 根据权利要求18所述的装置,其特征在于,所述SRS由叠加掩码的SRS频域序列经过时域映射获得。
- 根据权利要求19所述的装置,其特征在于,所述装置包括生成单元,用于生成叠 加掩码的SRS频域序列,具体用于:将SRS频域序列与掩码序列相乘,生成叠加掩码的SRS频域序列。
- 根据权利要求19-21任一项所述的装置,其特征在于,所述装置还包括预设单元,用于:在所述生成信道探测参考信号SRS之前,获取预设加掩码形式,并根据所述预设加掩码形式确定SRS频域序列中叠加掩码的位置。
- 根据权利要求22所述的装置,其特征在于,所述获取预设加掩码形式,包括:获取索引号,根据所述索引号读取加掩码形式检索表,所述加掩码形式检索表中包括索引号和所述索引号对应的加掩码形式;根据读取结果确定所述预设加掩码形式。
- 根据权利要求20-23任一项所述的装置,其特征在于,所述掩码序列为根据基站相关参数和第一SRS相关参数生成的第一掩码序列,其中所述基站相关参数为目标基站对应的卫星小区或卫星波束的相关参数。
- 根据权利要求20-23任一项所述的装置,其特征在于,所述掩码序列为根据终端设备相关参数和第一SRS相关参数生成的第二掩码序列,所述终端设备相关参数包括所述终端设备的小区无线网络临时标识。
- 根据权利要求20-23任一项所述的装置,其特征在于,所述掩码序列为根据所述第一SRS相关参数和第二SRS相关参数生成的第三掩码序列,所述第二SRS相关参数用于指示SRS的时频资源。
- 根据权利要求18-26任选一项所述的装置,其特征在于,所述装置还包括指示单元,用于:在所述生成信道探测参考信号SRS之前,获取所述终端设备需要发送SRS的目标基站的指示参数,所述指示参数用于表征所述目标基站对应的卫星小区或卫星波束的类型;确定所述指示参数位于可加掩码参数值区间内。
- 根据权利要求18所述的装置,其特征在于,在生成信道探测参考信号SRS方面,所述装置具体用于:获取指示所述SRS子载波宽度的第一指示信令;根据所述第一指示信令生成SRS。
- 根据权利要求18所述的装置,其特征在于,在生成信道探测参考信号SRS方面,所述装置具体用于:获取所述SRS可支持的发送结构相关的第二指示信令,所述第二指示信令用于指示所述SRS可支持的发送结构包括梳状结构和非梳状结构;根据所述第二指示信令生成SRS。
- 一种信号处理装置,其特征在于,所述装置包括:接收单元,用于接收终端设备发送的SRS;跟踪单元,用于根据所述SRS跟踪所述终端设备的上行定时位置,所述上行定时位置变化范围不小于1个SRS符号长度。
- 根据权利要求30所述的方法,其特征在于,所述SRS由叠加掩码的SRS频域序列经过时域映射获得,所述跟踪单元具体用于:获取与所述SRS对应的掩码序列,并根据所述掩码序列对所述叠加掩码的SRS频域序列进行解码,获取所述SRS中的频域数据;根据所述频域数据跟踪所述终端设备的上行定时位置。
- 根据权利要求31所述的方法,其特征在于,在获取与所述SRS对应的掩码序列之前,所述跟踪单元还用于:获取预设加掩码形式,并根据所述预设加掩码形式确定对所述SRS进行解码的位置。
- 根据权利要求30所述的方法,其特征在于,在所述接收终端设备发送的SRS之前,所述接收单元还用于:向所述终端设备发送第一指示信令,所述第一指示信令用于指示SRS子载波宽度。
- 根据权利要求30所述的方法,其特征在于,在所述接收终端设备发送的SRS之前,所述接收单元还用于:向所述终端设备发送第二指示信令,所述第二指示信令用于指示SRS可支持的发送结构包括梳状结构和非梳状结构。
- 一种计算机可读存储介质,其特征在于,存储有计算机可读指令,当所述计算机可读指令在计算机上运行时,使得计算机执行如权利要求1-12任一项所述的方法,或者,执行如权利要求13-17任一项所述的方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品包括计算机程序代码,当所述计算机程序代码在计算机上运行时,使得计算机执行如权利要求1-12任一项所述的方法,或者,执行如权利要求13-17任一项所述的方法。
- 一种通信装置,包括:输入接口电路,逻辑电路和输出接口电路,其中,所述逻辑电路,用于执行如权利要求1-12任一项所述的方法,或者,执行如权利要求13-17任一项所述的方法。
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104796927A (zh) * | 2014-01-20 | 2015-07-22 | 北京三星通信技术研究有限公司 | 一种发现信号的接收检测方法和设备 |
CN106034018A (zh) * | 2015-03-17 | 2016-10-19 | 中兴通讯股份有限公司 | 一种载波复用的方法和站点 |
WO2018031770A1 (en) * | 2016-08-10 | 2018-02-15 | Idac Holdings, Inc. | Methods, devices and systems for grant-less uplink multiple access |
Family Cites Families (5)
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WO2015053590A1 (ko) * | 2013-10-11 | 2015-04-16 | 삼성전자 주식회사 | 셀룰러 이동 통신 시스템에서 srs 전송 방법 및 장치 |
US9847862B2 (en) * | 2015-03-14 | 2017-12-19 | Qualcomm Incorporated | Reciprocal channel sounding reference signal multiplexing |
CN107801240A (zh) * | 2016-09-07 | 2018-03-13 | 中兴通讯股份有限公司 | 一种发送、接收定时提前量的方法和装置 |
US10530622B2 (en) * | 2016-11-03 | 2020-01-07 | Huawei Technologies Co., Ltd. | Methods and apparatuses for transmitting and receiving uplink reference signals using non-orthogonal sequences |
-
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104796927A (zh) * | 2014-01-20 | 2015-07-22 | 北京三星通信技术研究有限公司 | 一种发现信号的接收检测方法和设备 |
CN106034018A (zh) * | 2015-03-17 | 2016-10-19 | 中兴通讯股份有限公司 | 一种载波复用的方法和站点 |
WO2018031770A1 (en) * | 2016-08-10 | 2018-02-15 | Idac Holdings, Inc. | Methods, devices and systems for grant-less uplink multiple access |
Non-Patent Citations (2)
Title |
---|
See also references of EP4027713A4 |
ZTE MICROELECTRONICS TECHNOLOGY, NUBIA TECHNOLOGY: "Discussion on SRS design for eLAA UL", 3GPP DRAFT; R1-162324 - DISCUSS ON SRS DESIGN FOR ELAA UL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Busan, Korea; 20160411 - 20160415, 1 April 2016 (2016-04-01), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051079542 * |
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