CN111147213A - Signal sending method and terminal - Google Patents
Signal sending method and terminal Download PDFInfo
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- CN111147213A CN111147213A CN201811303661.6A CN201811303661A CN111147213A CN 111147213 A CN111147213 A CN 111147213A CN 201811303661 A CN201811303661 A CN 201811303661A CN 111147213 A CN111147213 A CN 111147213A
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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
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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
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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Abstract
The invention discloses a signal sending method and a terminal, wherein the signal sending method comprises the following steps: transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH. The scheme of the invention can accommodate more SSBs in one Slot, thereby reducing the time occupied by beam scanning.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal sending method and a terminal.
Background
In a 5G NR (NR Radio Access, new Radio Access technology) V2X system, terminals use a PC5 port (Sidelink) for direct communication with each other. Before the service data transmission is carried out, synchronization is established between two terminals which need to communicate at first at a port of the PC 5. The method for establishing synchronization is that one terminal A sends synchronization and broadcast signals, the other terminal B receives the synchronization and broadcast signals sent by the terminal A, once the terminal B successfully receives and demodulates, the two terminals can establish synchronization, and preparation is made for the next step of direct communication.
The Synchronization Signal of the NR UU port is carried by an SSB Block (Synchronization Signal Block). Each Slot carries 2 SSB blocks, and PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal) have no time-domain repetition mechanism.
Before the UE is ready to perform service transmission on the direct link, synchronization needs to be achieved on the direct link, and in order to expand the coverage of the synchronization signal, time domain repetition of the PSS/SSS signal needs to be performed to enhance the detection performance of the synchronization signal.
As shown in fig. 1, it is a schematic design diagram of R14 synchronized broadcast information. The abscissa is the time domain and each column represents one OFDM symbol. The ordinate is the frequency domain, which in the figure is 6 RB. A Slot accommodates a Synchronization Signal Block (SSB) including S-PSS (direct link Primary Synchronization Signal), S-SSS (direct link Secondary Synchronization Signal), PSBCH (Physical downlink Broadcast Channel), and DMRS (Demodulation Reference Signal) as necessary.
In order to complete Beam measurement and Beam selection, the SSB at the NR UU port needs to perform Beam scanning (Beam scanning), where the Beam scanning is that the base station transmits the SSB once in each possible Beam direction within a certain time interval (5ms), and then the terminal measures the SSB signal strength of each Beam and reports the measurement result to the base station, and the base station selects the most suitable Beam to transmit data to the terminal according to the measurement result reported by the terminal. The number of directions in which beams need to be scanned is also different according to different carrier frequencies and different subcarrier intervals. The maximum values of the SSB beam scanning candidate directions in different carrier frequency ranges are respectively: 4/8/64, the number of beam scanning directions actually deployed cannot exceed this maximum.
When NR V2X Sidelink is used to transmit synchronization information, SSB beam scanning is also needed to ensure that the coverage of SSB beams is large enough to ensure good synchronization performance of V2X.
The synchronization period of LTE V2X is 160ms, and at most 3 synchronization subframes can be configured in each synchronization period. For NRV2X, the number of synchronization subframes may be increased, but to ensure sufficient duration for traffic transmission, the number of synchronization subframes will be very limited.
In addition, in order to expand the coverage of the synchronization signal, time domain repetition of the S-PSS and S-SSS signals may be required, and a relatively large number of time domain symbols are occupied, so that only one SSB block can be carried in each Slot if the R14 multiplexing mechanism is continued. Only 1 SSB in each Slot results in a longer time occupied by SSB beam scanning, so that the available duration of service transmission on the Sidelink becomes shorter, which affects the timeliness and available resources of service transmission on the Sidelink, and results in an increase in delay and a decrease in available resources of service transmission on the Sidelink.
Disclosure of Invention
The embodiment of the invention provides a signal sending method and a terminal, which can avoid the problems of time delay increase and available resource reduction of service transmission on a direct link.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:
a method of transmitting a signal, comprising:
transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
Wherein the set of time slots includes at least one time slot.
Each SSB comprises a primary synchronization signal PSS positioned on at least 1 OFDM symbol, a secondary synchronization signal SSS positioned on at least 1 OFDM symbol, a physical broadcast channel PBCH positioned on at least 1 OFDM symbol and a demodulation reference signal DMRS positioned on at least 1 OFDM symbol.
And the OFDM symbol in which the DMRS is located is adjacent to the OFDM symbol in which the PBCH is located.
And the OFDM symbol where the PSS is located is adjacent to the OFDM symbol where the DMRS is located, or is adjacent to the OFDM symbol where the SSS is located, or is adjacent to the OFDM symbol where the PBCH is located.
Wherein, the interval between two adjacent SSBs is 0, 1 or 3 OFDM symbols for transmitting data.
Wherein the PBCH occupies at least 2 OFDM symbols or the PSS occupies at least 2 OFDM symbols or the SSS occupies at least 2 OFDM symbols.
When the PBCH occupies at least 2 OFDM symbols, the OFDM symbols occupied by the SSS or the OFDM symbols occupied by the DMRS are located between the at least 2 OFDM symbols occupied by the PBCH, or the PBCH occupies at least 2 continuous OFDM symbols;
the PSS occupies at least 2 consecutive OFDM symbols.
The SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.
An embodiment of the present invention further provides a terminal, including:
a transceiver for transmitting a synchronization signal block SSB in each of a set of time slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
Each SSB comprises a primary synchronization signal PSS positioned on at least 1 OFDM symbol, a secondary synchronization signal SSS positioned on at least 1 OFDM symbol, a physical broadcast channel PBCH positioned on at least 1 OFDM symbol and a demodulation reference signal DMRS positioned on at least 1 OFDM symbol.
An embodiment of the present invention further provides a signal transmitting apparatus, including:
a processing module for transmitting an upper synchronization signal block SSB in each of a set of time slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
An embodiment of the present invention further provides a terminal, including: a processor configured to perform the following functions: transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
The embodiment of the invention has the beneficial effects that:
in the above embodiment of the present invention, the synchronization signal block SSB is transmitted in each of a group of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a synchronization signal and a physical broadcast channel PBCH. The auxiliary synchronization signal SSS and the demodulation reference signal DMRS are transmitted in a frequency division multiplexing mode on at least one OFDM symbol, so that more SSBs can be accommodated in one Slot, the time occupied by beam scanning can be further reduced, more time is reserved for service transmission on a through link, the time delay of service transmission on the through link is reduced, and available resources of service transmission on the through link are increased.
Drawings
FIG. 1 is a schematic diagram of a 5G NR synchronization signal block design;
fig. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention;
fig. 3 to fig. 10 are schematic diagrams illustrating the design schemes of the transmission patterns of the synchronization signal blocks according to the embodiment of the present invention;
FIG. 11 is a block diagram of a terminal according to the present invention; (ii) a
FIG. 12 is a diagram illustrating a PSS/SSS as a reference signal in a transmission pattern of a synchronization signal block according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment of the invention provides a method for sending synchronous broadcast information, which is used for sending synchronous and broadcast signals in a wireless channel, reducing the time occupied by beam scanning and reserving more time for service transmission.
As shown in fig. 2, an embodiment of the present invention provides a signal transmission method, including:
The set of time slots includes at least one time slot. Optionally, a reference signal occupying at least one orthogonal frequency division multiplexing OFDM symbol is located in front of each SSB; the reference signal may be an Automatic Gain Control (AGC) signal or a channel estimation reference signal. The reference signals may be PSS or SSS.
The signal transmission method of the embodiment may be applied to signal transmission of a through link, but is not limited to signal transmission of a through link. When the method is applied to signal transmission of the through link, in the embodiment of the invention, the SSB is an S-SSB (through link synchronization signal block), the PSS is an S-PSS (through link primary synchronization signal), the SSS is an S-SSS (through link secondary synchronization signal), and the PBCH is a PSBCH (through link physical broadcast channel).
The following description will be made by taking the transmission of signals of the through link as an example:
in a specific embodiment of the present invention, one implementation manner of step 21 includes:
in the transmission pattern of S-SSB: each S-SSB includes a through-link primary synchronization signal S-PSS over at least 1 OFDM symbol, a through-link secondary synchronization signal S-SSS over at least 1 OFDM symbol, a through-link physical broadcast channel PSBCH over at least 1 OFDM symbol, and a demodulation reference signal DMRS over at least 1 OFDM symbol. Preferably, the transmission pattern is used when the bandwidth occupied by the synchronization signal block is 50 RB.
A first implementation of the transmission pattern is shown in fig. 3, and the distribution pattern of S-SSBs in a single Slot is:
and each 1 Slot contains 3S-SSBs. In the first S-SSB, an S-PSS signal is positioned in an OFDM symbol # 1, a PSBCH is positioned in an OFDM symbol # 2, and the S-SSS and the DMRS are positioned in an OFDM symbol # 3 together in a frequency division multiplexing mode. In the second S-SSB, the S-PSS signal is located in the OFDM symbol # 5, the PSBCH is located in the OFDM symbol # 6, and the S-SSS and the DMRS are co-located in the OFDM symbol # 7 in a frequency division multiplexing mode. In the third S-SSB, an S-PSS signal is positioned in an OFDM symbol # 10, a PSBCH is positioned in an OFDM symbol # 11, and the S-SSS and the DMRS are positioned in an OFDM symbol # 12 together in a frequency division multiplexing mode.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is frequency division multiplexed with the S-SSS; the first S-S-SSB and the second S-S-SSB are separated by 0 OFDM symbols for transmitting data, namely the first S-S-SSB is adjacent to the second S-S-SSB, and the second S-SSB and the third S-SSB are separated by 1 OFDM symbol for transmitting data; and the OFDM symbol where the S-PSS is positioned is adjacent to the OFDM symbol where the PSBCH is positioned.
In the embodiment, the transmission bandwidth of 50RB is adopted, and the number of S-SSBs contained in one Slot is large; and 1 symbol can be used for transmitting the delay sensitive service between the 2 nd S-SSB and the 3 rd S-SSB, thereby reducing the data transmission delay.
A second implementation of the transmission pattern is shown in fig. 4, where the distribution pattern of S-SSBs in a single Slot is:
and each 1 Slot contains 3S-SSBs. In the first S-SSB, an S-PSS signal is positioned in an OFDM symbol # 1, a PSBCH is positioned in an OFDM symbol # 3, and the S-SSS and the DMRS are positioned in an OFDM symbol # 2 together in a frequency division multiplexing mode. In the second S-SSB, the S-PSS signal is located in the OFDM symbol # 5, the PSBCH is located in the OFDM symbol # 7, and the S-SSS and the DMRS are co-located in the OFDM symbol # 6 in a frequency division multiplexing mode. In the third S-SSB, an S-PSS signal is positioned in an OFDM symbol # 10, a PSBCH is positioned in an OFDM symbol # 12, and the S-SSS and the DMRS are positioned in an OFDM symbol # 11 together in a frequency division multiplexing mode.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is frequency division multiplexed with the S-SSS; 0 OFDM symbols for transmitting data are separated between the first S-S-SSB and the second S-S-SSB, namely the first S-S-SSB is adjacent to the second S-S-SSB, and 1 OFDM symbol for transmitting data is separated between the second S-S-SSB and the third S-S-SSB; and the OFDM symbol where the S-PSS is positioned is adjacent to the OFDM symbol where the S-SSS is positioned.
In the embodiment, the transmission bandwidth of 50RB is adopted, and the number of S-SSBs contained in one Slot is large; and 1 symbol can be used for transmitting the delay sensitive service between the 2 nd S-SSB and the 3 rd S-SSB, thereby reducing the data transmission delay.
A third implementation of the transmission pattern is shown in fig. 5, and the distribution pattern of S-SSB in a single Slot is:
every 1 Slot contains 2S-SSBs. In the first S-SSB, S-PSS signals are positioned in OFDM symbols # 1 and #2, PSBCH is positioned in OFDM symbol # 3, and S-SSS and DMRS are positioned in OFDM symbols # 4 and #5 together in a frequency division multiplexing mode. The S-PSS signal in the second S-SSB is positioned at OFDM symbols # 8 and #9, the PSBCH is positioned at OFDM symbol # 10, and the S-SSS and the DMRS are positioned at OFDM symbols # 11 and #12 together in a frequency division multiplexing mode.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is in frequency division multiplexing with the S-SSS, and 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies two continuous OFDM symbols, the DMRS occupies two continuous OFDM symbols, and the OFDM symbol where the S-PSS is located is adjacent to the OFDM symbol where the PSBCH is located.
The embodiment adopts a mode of repeating symbols of S-PSS and S-SSS for transmission, and the detection performance of the S-PSS and the S-SSS is better; and 1 symbol in the middle of the two S-SSBs can be used for transmitting the delay sensitive service, thereby reducing the data transmission delay.
A fourth implementation of the transmission pattern is shown in fig. 6, and the distribution pattern of S-SSB in a single Slot is:
every 1 Slot contains 2S-SSBs. In the first S-SSB, S-PSS signals are positioned in OFDM symbols # 1 and #2, PSBCH is positioned in OFDM symbol # 5, and S-SSS and DMRS are positioned in OFDM symbols # 3 and #4 together in a frequency division multiplexing mode. In the second S-SSB, S-PSS signals are positioned at OFDM symbols # 8 and #9, PSBCH is positioned at OFDM symbol # 12, and S-SSS and DMRS are positioned at OFDM symbols # 10 and #11 together in a frequency division multiplexing mode.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is in frequency division multiplexing with the S-SSS, and 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies two continuous OFDM symbols, the DMRS occupies two continuous OFDM symbols, and the OFDM symbol where the S-PSS is located is adjacent to the OFDM symbol where the DMRS is located.
The embodiment adopts a mode of repeating symbols of S-PSS and S-SSS for transmission, and the detection performance of the S-PSS and the S-SSS is better; and 1 symbol in the middle of the two S-SSBs can be used for transmitting the delay sensitive service, thereby reducing the data transmission delay.
In another embodiment of the present invention, another implementation manner of step 21 includes:
in the transmission pattern of S-SSB: each S-SSB includes a through-link primary synchronization signal S-PSS over at least 1 OFDM symbol, a through-link secondary synchronization signal S-SSS over at least 1 OFDM symbol, a through-link physical broadcast channel PSBCH over at least 1 OFDM symbol, and a demodulation reference signal DMRS over at least 2 OFDM symbols. Preferably, the transmission pattern is used when the bandwidth occupied by the synchronization signal block is 25 RB.
A first implementation of the transmission pattern is shown in fig. 7, and the distribution pattern of S-SSBs in a single Slot is:
every 1 Slot contains 2S-SSBs. In the first S-SSB, an S-PSS signal is positioned at an OFDM symbol # 1, a PSBCH is positioned at OFDM symbols # 2 and #4, an S-SSS and a DMRS are positioned at an OFDM symbol # 3 together in a frequency division multiplexing mode, and a column of DMRS occupation symbols # 5 is arranged. In the second S-SSB, an S-PSS signal is positioned at an OFDM symbol # 8, a PSBCH is positioned at OFDM symbols # 9 and #11, an S-SSS and a DMRS are positioned at an OFDM symbol # 10 together in a frequency division multiplexing mode, and a column of DMRS occupying symbols # 12 is arranged.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is in frequency division multiplexing with the S-SSS, and 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the PSBCH; the PSBCH occupies 2 OFDM symbols, and the OFDM symbols occupied by the S-SSS are located between the 2 OFDM symbols occupied by the PSBCH.
The embodiment adopts 25RB transmission bandwidth, and the frequency spectrum efficiency of the system is higher; and 1 symbol in the middle of the two S-SSBs can be used for transmitting the delay sensitive service, thereby reducing the data transmission delay.
A second implementation of the transmission pattern is shown in fig. 8, where the distribution pattern of S-SSBs in a single Slot is:
every 1 Slot contains 2S-SSBs. In the first S-SSB, an S-PSS signal is positioned at an OFDM symbol # 1, a PSBCH is positioned at OFDM symbols # 3 and #4, an S-SSS and a DMRS are positioned at an OFDM symbol # 2 together in a frequency division multiplexing mode, and a column of DMRS occupation symbols # 5 is arranged. In the second S-SSB, an S-PSS signal is positioned at an OFDM symbol # 8, a PSBCH is positioned at OFDM symbols # 10 and #11, an S-SSS and a DMRS are positioned at an OFDM symbol # 9 together in a frequency division multiplexing mode, and a column of DMRS occupying symbols # 12 is arranged.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is in frequency division multiplexing with the S-SSS, and 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the S-SSS; the PSBCH occupies 2 consecutive OFDM symbols.
The embodiment adopts 25RB transmission bandwidth, and the frequency spectrum efficiency of the system is higher; and 1 symbol in the middle of the two S-SSBs can be used for transmitting the delay sensitive service, thereby reducing the data transmission delay.
A third implementation of the transmission pattern is shown in fig. 9, and the distribution pattern of S-SSB in a single Slot is:
every 1 Slot contains 2S-SSBs. In the first S-SSB, S-PSS signals are positioned in OFDM symbols # 1 and #2, PSBCH is positioned in OFDM symbols # 3 and #5, and S-SSS and DMRS are positioned in OFDM symbol # 4 together in a frequency division multiplexing mode. In the second S-SSB, S-PSS signals are positioned at OFDM symbols # 8 and #9, PSBCH is positioned at OFDM symbols # 10 and #12, and S-SSS and DMRS are positioned at OFDM symbol # 11 together in a frequency division multiplexing mode.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is in frequency division multiplexing with the S-SSS, and 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies 2 continuous OFDM symbols, the PSBCH occupies 2 OFDM symbols, and the OFDM symbols occupied by the S-SSS are located between the 2 OFDM symbols occupied by the PSBCH.
The embodiment adopts 25RB transmission bandwidth, and the frequency spectrum efficiency of the system is higher; and the method of repeating the S-PSS symbols is adopted for transmission, so that the detection performance of the S-PSS is better; and 1 symbol in the middle of the two S-SSBs can be used for transmitting the delay sensitive service, thereby reducing the data transmission delay.
A fourth implementation of the transmission pattern is shown in fig. 10, and the distribution pattern of S-SSBs in a single Slot is:
every 1 Slot contains 2S-SSBs. In the first S-SSB, an S-PSS signal is positioned in an OFDM symbol # 1, a PSBCH is positioned in OFDM symbols # 2 and #5, and an S-SSS and a DMRS are positioned in OFDM symbols # 3 and #4 together in a frequency division multiplexing mode. In the second S-SSB, the S-PSS signal is located in OFDM # 8, the PSBCH is located in OFDM # 9 and #12, and the S-SSS and the DMRS are co-located in OFDM # 10 and #11 in a frequency division multiplexing mode.
In this embodiment, OFDM symbol # n represents the n +1 th symbol inside one Slot. For example, OFDM symbol # 3 represents the 4 th symbol inside one Slot; the DMRS is in frequency division multiplexing with the S-SSS, and 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the PSBCH, the PSBCH occupies 2 OFDM symbols, the S-SSS occupies 2 continuous OFDM symbols, and the S-SSS occupies 2 continuous OFDM symbols located between the 2 OFDM symbols occupied by the PSBCH.
The embodiment adopts 25RB transmission bandwidth, and the frequency spectrum efficiency of the system is higher; the S-SSS symbol repetition mode is adopted for sending, and the S-SSS detection performance is good; and 1 symbol in the middle of the two S-SSBs can be used for transmitting the delay sensitive service, thereby reducing the data transmission delay.
In the embodiment of the invention, the Sidelink auxiliary synchronization signal S-SSS and the demodulation reference signal DMRS are transmitted in a frequency division multiplexing mode on at least one OFDM symbol, so that more S-SSBs can be accommodated in one Slot, the occupied time of beam scanning can be further reduced, more time is reserved for service transmission on a direct link, the time delay of service transmission on the direct link is reduced, and the available resources of service transmission on the direct link are increased.
As shown in fig. 11, an embodiment of the present invention further provides a terminal 110, including:
a transceiver 111 for transmitting an upper synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
Each SSB comprises a primary synchronization signal PSS positioned on at least 1 OFDM symbol, a secondary synchronization signal SSS positioned on at least 1 OFDM symbol, a physical broadcast channel PBCH positioned on at least 1 OFDM symbol and a demodulation reference signal DMRS positioned on at least 1 OFDM symbol.
Wherein the set of time slots includes at least one time slot. Optionally, a reference signal occupying at least one orthogonal frequency division multiplexing OFDM symbol is located in front of each SSB; the reference signal is a reference signal for performing automatic gain control or channel estimation.
Each SSB comprises a primary synchronization signal PSS positioned on at least 1 OFDM symbol, a secondary synchronization signal SSS positioned on at least 1 OFDM symbol, a physical broadcast channel PBCH positioned on at least 1 OFDM symbol and a demodulation reference signal DMRS positioned on at least 1 OFDM symbol.
And the OFDM symbol in which the DMRS is located is adjacent to the OFDM symbol in which the PBCH is located.
And the OFDM symbol where the PSS is located is adjacent to the OFDM symbol where the DMRS is located, or is adjacent to the OFDM symbol where the SSS is located, or is adjacent to the OFDM symbol where the PBCH is located.
Wherein, the interval between two adjacent SSBs is 0, 1 or 3 OFDM symbols for transmitting data.
Wherein the PBCH occupies at least 2 OFDM symbols or the PSS occupies at least 2 OFDM symbols or the SSS occupies at least 2 OFDM symbols.
When the PBCH occupies at least 2 OFDM symbols, the OFDM symbols occupied by the SSS or the OFDM symbols occupied by the DMRS are located between the at least 2 OFDM symbols occupied by the PBCH, or the PBCH occupies at least 2 continuous OFDM symbols;
the PSS occupies at least 2 consecutive OFDM symbols.
The SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.
It should be noted that the embodiments shown in fig. 3 to 10 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved. The terminal may further include: the processor 112, the memory 113, and the like, the transceiver 111 and the memory 113, and the transceiver 111 and the processor 112 may be communicatively connected through a bus interface, the function of the processor 112 may also be implemented by the transceiver 111, and the function of the transceiver 111 may also be implemented by the processor 112.
An embodiment of the present invention further provides a signal transmitting apparatus, including:
a processing module, configured to send a synchronization signal block SSB in each of a set of time slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
It should be noted that the embodiments shown in fig. 3 to 10 are also applicable to the embodiment of the apparatus, and the same technical effects can be achieved.
An embodiment of the present invention further provides a terminal, including: a processor configured to perform the following functions: transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH. The embodiments shown in fig. 3 to 10 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved.
Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
As shown in fig. 12, in all the above embodiments of the present invention, when the reference signal is PSS or SSS, 2 SSBs are contained in every 1 Slot. The S-PSS signal in the first SSB is located at OFDM symbols # 0 and #1, DMRS is located at OFDM symbol # 3, PSBCH is located at OFDM symbols # 2 and #4, and S-SSS is located at OFDM symbol # 5. In the second SSB, the S-PSS signal is located at OFDM symbols # 7 and #8, the DMRS is located at OFDM symbol # 10, the PSBCH is located at OFDM symbols # 9 and #11, and the S-SSS is located at OFDM symbol # 12. The S-PSS located at symbols # 0 and #7 can also be used for AGC at the same time.
In the embodiment of the invention, the auxiliary synchronization signal S-SSS and the demodulation reference signal DMRS are transmitted in a frequency division multiplexing mode on at least one OFDM symbol, so that more SSBs can be accommodated in one Slot, the occupied time of beam scanning can be reduced, more time is reserved for service transmission on a through link, the service transmission time delay on the through link is reduced, and the available resources of the service transmission on the through link are increased.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
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, 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, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (14)
1. A method for transmitting a signal, comprising:
transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
2. The method of claim 1, wherein the set of slots comprises at least one slot.
3. The signal transmission method according to claim 1, wherein each SSB comprises a primary synchronization signal PSS over at least 1 OFDM symbol, a secondary synchronization signal SSS over at least 1 OFDM symbol, a physical broadcast channel PBCH over at least 1 OFDM symbol, and a demodulation reference signal DMRS over at least 1 OFDM symbol.
4. The method according to claim 3, wherein the OFDM symbol in which the DMRS is located is adjacent to the OFDM symbol in which the PBCH is located.
5. The method according to claim 3, wherein the OFDM symbol with the PSS is adjacent to the OFDM symbol with the DMRS or adjacent to the OFDM symbol with the SSS or adjacent to the OFDM symbol with the PBCH.
6. The signal transmission method of claim 3, wherein adjacent two SSBs are separated by 0, 1 or 3 OFDM symbols for transmitting data.
7. The method of claim 3, wherein the PBCH occupies at least 2 OFDM symbols or the PSS occupies at least 2 OFDM symbols or the SSS occupies at least 2 OFDM symbols.
8. The method according to claim 7, wherein when the PBCH occupies at least 2 OFDM symbols, the OFDM symbol occupied by the SSS or the OFDM symbol occupied by the DMRS is located between at least 2 OFDM symbols occupied by the PBCH, or the PBCH occupies at least 2 consecutive OFDM symbols;
the PSS occupies at least 2 consecutive OFDM symbols.
9. The method according to any one of claims 1 to 8,
the SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.
10. A terminal, comprising:
a transceiver for transmitting a synchronization signal block SSB in each of a set of time slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
11. The terminal of claim 10, wherein each SSB comprises a primary synchronization signal PSS over at least 1 OFDM symbol, a secondary synchronization signal SSS over at least 1 OFDM symbol, a physical broadcast channel PBCH over at least 1 OFDM symbol, and a demodulation reference signal DMRS over at least 1 OFDM symbol.
12. An apparatus for transmitting a signal, comprising:
a processing module, configured to send a synchronization signal block SSB in each of a set of time slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
13. A terminal, comprising: a processor configured to perform the following functions: transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and a Secondary Synchronization Signal (SSS) and a demodulation reference signal (DMRS) in each SSB are subjected to frequency division multiplexing on at least one OFDM symbol; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel.
14. A computer storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 9.
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| CN201811303661.6A CN111147213B (en) | 2018-11-02 | 2018-11-02 | Signal sending method and terminal |
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| WO2023220844A1 (en) * | 2022-05-14 | 2023-11-23 | Lenovo (Beijing) Limited | Methods and apparatuses for s-ssb transmission in unlicensed spectrum |
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