CN111147207B - Signal sending method and terminal - Google Patents

Signal sending method and terminal Download PDF

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Publication number
CN111147207B
CN111147207B CN201811303019.8A CN201811303019A CN111147207B CN 111147207 B CN111147207 B CN 111147207B CN 201811303019 A CN201811303019 A CN 201811303019A CN 111147207 B CN111147207 B CN 111147207B
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ofdm symbol
synchronization signal
sss
pss
ssb
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CN111147207A (en
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任晓涛
郑方政
赵锐
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a signal sending method and a terminal, wherein the 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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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 improve the detection success rate of the primary synchronization signal PSS, thereby reducing the error rate of SSB detection and improving the coverage distance of the synchronization signal block.

Description

Signal sending method and terminal
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 communicate directly with each other using a PC5 port (Sidelink). Before the service data transmission, synchronization is established between two terminals which need to communicate first at port PC5 (Sidelink). 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 SSB (Synchronization Signal Block). Each Slot carries 2 SSB blocks and there is no time domain repetition mechanism for PSS and SSS signals.
As shown in fig. 1, a 5G NR synchronous broadcast block SSB design, in 5G NR, each Slot includes 2 SSBs, and each SSB is composed of a PSS signal, an SSS signal, and a PBCH channel. As shown in fig. 1, the abscissa is the time domain, and each column represents one OFDM symbol. The ordinate is the frequency domain, which is 20RB in the figure. Two Synchronization Signal Blocks (SSB) are accommodated in one Slot, and are located in OFDM symbols #2 to #5 and #8 to #11, respectively. One synchronization broadcast block includes PSS signals, SSS signals, which occupy one symbol in the time domain and 12 RBs in the frequency domain, and PBCH signals, which occupy 48 RBs in total, distributed over 3 OFDM symbols. The PSS signal and the SSS signal have the same sequence length and are m sequences of 127 lengths.
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.
For the V2X Sidelink communication link, since both the transmitting and receiving parties are terminals and the moving speed of the terminals is relatively high (the relative speed can reach up to 500Kmh), the success rate of detecting the primary synchronization signal S-PSS is reduced when both the transmitting and receiving parties move at high speed, and the error rate of detecting the SSB is increased. The coverage distance of the synchronous broadcast block SSB is reduced, which may result in that many UEs cannot access to the V2X system, and the performance of the V2X communication system is affected.
Disclosure of Invention
The embodiment of the invention provides a signal sending method and a terminal, which solve the problem of the increase of the error rate of SSB (synchronization signal) detection caused by the low detection success rate of a primary synchronization signal PSS (primary synchronization signal).
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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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.
Wherein the sequence length of the PSS is greater than the sequence length of the SSS.
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.
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, and a physical broadcast channel P BCH positioned on at least 1 OFDM symbol.
Wherein the DMRS is frequency division multiplexed with the SSS.
And the OFDM symbol in which the DMRS is located is adjacent to the OFDM symbol in which the PBCH is located.
Wherein the SSS is frequency division multiplexed with the PBCH
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 or 1 OFDM symbol for transmitting data.
Wherein, the interval between two adjacent SSBs is 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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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 signal transmitting apparatus, including:
a transceiver 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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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, in each of a group of slots, a synchronization signal block SSB is transmitted; each time slot comprises at least two SSBs, and the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; the SSB is a combination block of a synchronization signal and a physical broadcast channel PBCH; therefore, the detection success rate of the primary synchronization signal PSS is improved, the error rate of SSB detection is reduced, and the coverage distance of the synchronous broadcast block is improved.
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 18 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. 19 is a block diagram of a terminal according to the present invention; (ii) a
FIG. 20 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.
Embodiments of the present invention provide a signal transmission method, which is used for transmitting synchronization and broadcast signals in a wireless channel, so as to improve a detection success rate of a PSS, reduce an SSB detection error rate, and improve a coverage of an SSB.
As shown in fig. 2, an embodiment of the present invention provides a signal transmission method, including:
step 21, in each time slot of a group of time slots, sending a synchronization signal block SSB; each time slot comprises at least two SSBs, and the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH.
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 sequence length of the PSS may be greater than the sequence length of the SSS or less than the sequence length of the 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 waveform used by the S-SSB on the through link is an orthogonal frequency division multiplexing DFT-S-OFDM waveform of discrete fourier transform spread spectrum.
A first implementation of the transmission pattern is shown in fig. 3, 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 DMRS is positioned in an OFDM symbol #2, a PSBCH is positioned in OFDM symbols #3 and #5, and the S-SSS and the DMRS are positioned in an OFDM symbol #4 together in a frequency division multiplexing mode. In the second S-SSB, an S-PSS signal is positioned in an OFDM symbol #8, a DMRS is positioned in an OFDM symbol #9, a PSBCH is positioned in OFDM symbols #10 and #12, and the S-SSS and the DMRS are positioned in an OFDM mode together in an OFDM symbol # 11. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; and the OFDM symbol where the S-PSS is located is adjacent to the OFDM symbol where the DMRS is located.
The DFT-s-OFDM waveform is adopted in the embodiment, so that the coverage distance is long; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing 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:
every 1 Slot contains 2S-SSBs. In the first S-SSB, an S-PSS signal is positioned in an OFDM symbol #1, a DMRS is positioned in an OFDM symbol #4, a PSBCH is positioned in OFDM symbols #3 and #5, and the S-SSS and the DMRS are positioned in an OFDM symbol #2 together. In the second S-SSB, an S-PSS signal is positioned in an OFDM symbol #8, a DMRS is positioned in an OFDM symbol #11, a PSBCH is positioned in OFDM symbols #10 and #12, and the S-SSS and the DMRS are positioned in an OFDM mode and are positioned in an OFDM symbol #9 together. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; and the OFDM symbol in which the DMRS is positioned is adjacent to the OFDM symbol in which the PSBCH is positioned.
The DFT-s-OFDM waveform is adopted in the embodiment, so that the coverage distance is long; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing 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, an S-PSS signal is positioned in an OFDM symbol #1, a DMRS is positioned in an OFDM symbol #5, a PSBCH is positioned in OFDM symbols #2 and #4, 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, an S-PSS signal is positioned in an OFDM symbol #8, a DMRS is positioned in an OFDM symbol #12, a PSBCH is positioned in OFDM symbols #9 and #11, and the S-SSS and the DMRS are positioned in an OFDM mode together in an OFDM symbol # 10. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; and the OFDM symbol where the S-PSS is positioned is adjacent to the OFDM symbol where the PSBCH is positioned.
The DFT-s-OFDM waveform is adopted in the embodiment, so that the coverage distance is long; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing 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, an S-PSS signal is positioned in an OFDM symbol #1, a DMRS is positioned in an OFDM symbol #3, a PSBCH is positioned in OFDM symbols #2 and #4, and the S-SSS and the DMRS are positioned in an OFDM symbol #5 together in a frequency division multiplexing mode. In the second S-SSB, an S-PSS signal is positioned at an OFDM symbol #8, a DMRS is positioned at an OFDM symbol #10, a PSBCH is positioned at OFDM symbols #9 and #11, and the S-SSS and the DMRS are positioned at an OFDM symbol #12 together in a frequency division multiplexing mode. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; and the OFDM symbol where the S-PSS is positioned is adjacent to the OFDM symbol where the PSBCH is positioned.
The DFT-s-OFDM waveform is adopted in the embodiment, so that the coverage distance is long; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A fifth 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 in an OFDM symbol #1, a DMRS is positioned in an OFDM symbol #5, a PSBCH is positioned in OFDM symbols #3 and #4, and the S-SSS and the DMRS are positioned in an OFDM symbol #2 together. In the second S-SSB, an S-PSS signal is positioned in an OFDM symbol #8, a DMRS is positioned in an OFDM symbol #11, a PSBCH is positioned in OFDM symbols #10 and #11, and the S-SSS and the DMRS are positioned in an OFDM mode together in an OFDM symbol # 9. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; the OFDM symbol where the S-PSS is located is adjacent to the DMRS and the OFDM symbol where the S-SSS is located; the PSBCH occupies two consecutive OFDM symbols.
The embodiment adopts DFT-s-OFDM waveform, and the coverage distance is longer; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A sixth implementation of the transmission pattern is shown in fig. 8, and the distribution pattern of S-SSB 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 DMRS is positioned in an OFDM symbol #2, a PSBCH is positioned in OFDM symbols #3 and #4, and the S-SSS and the DMRS are positioned in an OFDM symbol #5 together in a frequency division multiplexing mode. In the second S-SSB, an S-PSS signal is positioned at an OFDM symbol #8, a DMRS is positioned at an OFDM symbol #9, a PSBCH is positioned at OFDM symbols #10 and #11, and the S-SSS and the DMRS are positioned at the OFDM symbol #11 together in a frequency division multiplexing mode. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; and the OFDM symbol where the S-PSS is located is adjacent to the OFDM symbol where the DMRS is located, and the PSBCH occupies two continuous OFDM symbols.
The embodiment adopts DFT-s-OFDM waveform, and the coverage distance is longer; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A seventh implementation of the transmission pattern is shown in fig. 9, where the distribution pattern of S-SSBs 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. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; the S-PSS 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 DFT-s-OFDM waveform, and the coverage distance is longer; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
An eighth 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. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between the two S-SSBs; the DMRS and the S-SSS occupy 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 DFT-s-OFDM waveform, and the coverage distance is longer; the transmission bandwidth of the S-SSB is only 25RB, so that the frequency spectrum efficiency of the system can be improved; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A ninth implementation of the transmission pattern is shown in fig. 11, and the distribution pattern of S-SSB 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. The AGC is located at OFDM symbols #0, #4, and # 9.
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; no OFDM symbol is transmitted between the first S-SSB and the second S-SSB, and 1 OFDM symbol for transmitting data is arranged between the second S-SSB and the third S-SSB; and the OFDM symbol where the S-PSS is positioned is adjacent to the OFDM symbol where the DMRS and the S-SSS are positioned.
In the embodiment, only 3S-SSBs are placed in one Slot, and the number of the accommodated S-SSBs is large; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A tenth implementation of the transmission pattern is shown in fig. 12, 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 #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. The AGC is located at OFDM symbols #0, #4, and # 9.
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; no OFDM symbol is transmitted between the first S-SSB and the second S-SSB, and 1 OFDM symbol for transmitting data is arranged between the second S-SSB and the third S-SSB; and the OFDM symbol where the S-PSS is positioned is adjacent to the OFDM symbol where the PSBCH is positioned.
In the embodiment, only 3S-SSBs are placed in one Slot, and the number of the accommodated S-SSBs is large; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
An eleventh implementation of the transmission pattern is shown in fig. 13, where 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. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies two continuous OFDM symbols, the DMRS and the S-SSS occupy two continuous OFDM symbols, and the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the PSBCH.
The embodiment adopts the repeated transmission of the symbols of the S-PSS signal and the S-SSS signal, and the S-PSS occupies the whole transmission bandwidth of the S-SSB, so that the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A twelfth implementation of the transmission pattern is shown in fig. 14, and the distribution pattern of S-SSBs 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. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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; 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies two continuous OFDM symbols, the DMRS and the S-SSS occupy two continuous OFDM symbols, and the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the S-SSS.
The embodiment adopts the repeated transmission of the symbols of the S-PSS signal and the S-SSS signal, and the S-PSS occupies the whole transmission bandwidth of the S-SSB, so that the detection performance of the S-PSS is better; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing 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 located on at least 1 OFDM symbol, a through-link secondary synchronization signal S-SSS located on at least 1 OFDM symbol, and a through-link physical broadcast channel PSBCH located on at least 1 OFDM symbol.
Preferably, the transmission pattern is adopted when the waveform adopted by the S-SSB on the through link is an orthogonal frequency division multiplexing CP-OFDM waveform with a cyclic prefix.
A first implementation of the transmission pattern is shown in fig. 15, 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, an S-SSS signal is positioned in an OFDM symbol #3, a PSBCH is positioned in OFDM symbols #2 to #4, the PSBCH and the S-SSS signal are subjected to frequency division multiplexing on the symbol #3, and a DMRS signal is embedded in a PSBCH RE. The second S-SSB is where the S-PSS signal is located at OFDM #9, the S-SSS is located at OFDM #11, the PSBCH is located at OFDM # 10- #12, the PSBCH is frequency division multiplexed with the S-SSS signal at #11, and the DMRS signal is embedded in the PSBCH RE. The AGC is located at OFDM symbol #0 and OFDM symbol # 8.
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 embedded in a PSBCH RE; there are 3 OFDM symbols used for transmitting data between two S-SSBs; and the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the PSBCH, and the PSBCH and the S-SSS signals are subjected to frequency division multiplexing.
The embodiment occupies smaller bandwidth, and improves the frequency spectrum efficiency of the system; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 3 symbols in the middle of 2S-SSBs can be used for transmitting delay sensitive services, so that the data transmission delay is reduced.
A second implementation of the transmission pattern is shown in fig. 16, 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 in an OFDM symbol #1, an S-SSS signal is positioned in an OFDM symbol #3, a PSBCH is positioned in OFDM symbols #2 to #4, the PSBCH and the S-SSS signal are subjected to frequency division multiplexing on the symbol #3, and a DMRS signal is embedded in a PSBCH RE. The second S-SSB is where the S-PSS signal is located at OFDM #9, the S-SSS is located at OFDM #11, the PSBCH is located at OFDM # 10- #12, the PSBCH is frequency division multiplexed with the S-SSS signal at #11, and the DMRS signal is embedded in the PSBCH RE. The AGC is located at OFDM symbol #0 and OFDM symbol # 8.
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 embedded in a PSBCH RE; there are 3 OFDM symbols used for transmitting data between two S-SSBs; the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the S-SSS, and the PSBCH and the S-SSS signals are in frequency division multiplexing.
The embodiment occupies smaller bandwidth, and improves the frequency spectrum efficiency of the system; the S-PSS occupies the whole transmission bandwidth of the S-SSB, and the detection performance of the S-PSS is better; and 3 symbols in the middle of 2S-SSBs can be used for transmitting delay sensitive services, so that the data transmission delay is reduced.
A third implementation of the transmission pattern is shown in fig. 17, and the distribution pattern of S-SSB in a single Slot is:
every 1 Slot contains 2S-SSBs. The first S-SSB is that S-PSS signals are positioned at OFDM symbols #1 and #2, S-SSS is positioned at OFDM symbol #4, PSBCH is positioned at OFDM symbols #3 to #5, PSBCH and S-SSS signals are frequency division multiplexed at symbol #4, and DMRS signals are embedded in PSBCH RE. The second S-SSB is where the S-PSS signals are located at OFDM #8 and #9, the S-SSS is located at OFDM #11, the PSBCH is located at OFDM #10 to #12, the PSBCH is frequency division multiplexed with the S-SSS signals at symbol #11, and the DMRS signals are embedded in the PSBCH RE. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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 embedded in a PSBCH RE; 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies two continuous OFDM symbols, the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the PSBCH, and the PSBCH and the S-SSS signals are subjected to frequency division multiplexing.
The embodiment occupies smaller bandwidth, and improves the frequency spectrum efficiency of the system; the S-PSS signal symbol is adopted for repeated transmission, and the S-PSS occupies the whole transmission bandwidth of the S-SSB, so that the detection performance of the S-PSS is good; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
A fourth implementation of the transmission pattern is shown in fig. 18, where the distribution pattern of S-SSBs in a single Slot is:
every 1 Slot contains 2S-SSBs. The first S-SSB is that S-PSS signals are positioned at OFDM symbols #1 and #2, S-SSS is positioned at OFDM symbol #3, PSBCH is positioned at OFDM symbols #3 to #5, PSBCH and S-SSS signals are frequency division multiplexed on symbol #3, and DMRS signals are embedded in PSBCH RE. The second S-SSB is where the S-PSS signals are located at OFDM #8 and #9, the S-SSS is located at OFDM #10, the PSBCH is located at OFDM #10 to #12, the PSBCH is frequency division multiplexed with the S-SSS signals at symbol #10, and the DMRS signals are embedded in the PSBCH RE. The AGC is located at OFDM symbol #0 and OFDM symbol # 7.
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 embedded in a PSBCH RE; 1 OFDM symbol for transmitting data is arranged between two S-SSBs; the S-PSS occupies two continuous OFDM symbols, the OFDM symbols occupied by the S-PSS are adjacent to the OFDM symbols occupied by the S-SSS, and the PSBCH and the S-SSS signals are subjected to frequency division multiplexing.
The embodiment occupies smaller bandwidth, and improves the frequency spectrum efficiency of the system; the S-PSS signal symbol is adopted for repeated transmission, and the S-PSS occupies the whole transmission bandwidth of the S-SSB, so that the detection performance of the S-PSS is good; and 1 symbol in the middle of 2S-SSBs can be used for transmitting delay sensitive services, thereby reducing data transmission delay.
In the embodiment of the invention, the S-PSS and the S-SSS have different sequence lengths, and the sequence length of the primary synchronization signal S-PSS is longer, which is beneficial to improving the detection success rate of the primary synchronization signal S-PSS in V2X communication, thereby reducing the error rate of S-SSB detection on Sidelink, improving the coverage distance of a synchronous broadcast block, enabling as many UEs as possible to be accessed into a V2X system, and further improving the performance of the V2X communication system.
As shown in fig. 19, an embodiment of the present invention further provides a terminal 190, including:
a transceiver 191 for transmitting a synchronization signal block SSB in each of a set of slots; each time slot comprises at least two SSBs, and the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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. 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.
The sequence length of the PSS is greater than the sequence length of the SSS.
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.
Each SSB includes a primary synchronization signal PSS located over at least 1 OFDM symbol, a secondary synchronization signal SSS located over at least 1 OFDM symbol, and a physical broadcast channel pbch located over at least 1 OFDM symbol.
The DMRS is frequency division multiplexed with the SSS.
And the OFDM symbol in which the DMRS is located is adjacent to the OFDM symbol in which the PBCH is located.
The SSS is frequency division multiplexed with the PBCH
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.
Adjacent two SSBs are spaced by 0 or 1 OFDM symbol for transmitting data.
Two adjacent SSBs are spaced by 1 or 3 OFDM symbols for transmitting data.
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 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.
The SSB is S-SSB (direct link synchronization signal block), the PSS is S-PSS (direct link primary synchronization signal), the SSS is S-SSS (direct link secondary synchronization signal), and the PBCH is PSBCH (direct link physical broadcast channel).
It should be noted that the embodiments shown in fig. 3 to 18 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved. The terminal may further include: the processor 192, the memory 193, and the like, the transceiver 191 and the memory 193, and the transceiver 191 and the processor 192 may be communicatively connected by a bus interface, the function of the processor 192 may also be implemented by the transceiver 191, and the function of the transceiver 191 may also be implemented by the processor 192.
An embodiment of the present invention further provides a signal transmitting apparatus, including:
a transceiver 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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; 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 18 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 the sequence length of a primary synchronization signal PSS and a secondary synchronization signal SSS in each SSB is different; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel. The embodiments shown in fig. 3 to 18 described above are equally applicable to the embodiment of the apparatus, 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. 20, 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 S-PSS and the S-SSS have different sequence lengths, and the sequence length of the primary synchronization signal S-PSS is longer, which is beneficial to improving the detection success rate of the primary synchronization signal S-PSS in V2X communication, thereby reducing the error rate of S-SSB detection on Sidelink, improving the coverage distance of a synchronous broadcast block, enabling as many UEs as possible to be accessed into a V2X system, and further improving the performance of the V2X communication system.
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 (15)

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, the sequence length of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in each SSB is different, and the subcarrier spacing of the PSS and the SSS is the same; 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; or
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, and a physical broadcast channel PBCH positioned on at least 1 OFDM symbol;
the DMRS is frequency division multiplexed with the SSS.
2. The method of claim 1, wherein the set of slots comprises at least one slot.
3. The method of claim 1, wherein the sequence length of the PSS is longer than the sequence length of the SSS.
4. The signal transmission method according to claim 1,
and the OFDM symbol in which the DMRS is positioned is adjacent to the OFDM symbol in which the PBCH is positioned.
5. The signal transmission method according to claim 1,
the SSS is frequency division multiplexed with the PBCH.
6. The signal transmission method according to claim 1,
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.
7. The signal transmission method according to claim 1,
adjacent two SSBs are spaced by 0 or 1 OFDM symbol for transmitting data.
8. The signal transmission method according to claim 1,
two adjacent SSBs are spaced by 1 or 3 OFDM symbols for transmitting data.
9. The signal transmission method according to claim 1,
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.
10. The signal transmission method according to claim 9,
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 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.
11. The method of any one of claims 1 to 10, wherein 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.
12. 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, the sequence length of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in each SSB is different, and the subcarrier spacing of the PSS and the SSS is the same; 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; or
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, and a physical broadcast channel PBCH positioned on at least 1 OFDM symbol;
the DMRS is frequency division multiplexed with the SSS.
13. An apparatus for transmitting a signal, comprising:
a transceiver 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, the sequence length of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in each SSB is different, and the subcarrier spacing of the PSS and the SSS is the same; the SSB is a combined block of a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel;
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; or
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, and a physical broadcast channel PBCH positioned on at least 1 OFDM symbol;
the DMRS is frequency division multiplexed with the SSS.
14. 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, the sequence length of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in each SSB is different, and the subcarrier spacing of the PSS and the SSS is the same; 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; or
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, and a physical broadcast channel PBCH positioned on at least 1 OFDM symbol;
the DMRS is frequency division multiplexed with the SSS.
15. 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 11.
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