CN109041199B - Method and device for transmitting synchronization signal - Google Patents
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Abstract
The application discloses a method and a device for transmitting synchronous signals, wherein a plurality of synchronous signal blocks are newly added in a synchronous signal transmitting time window on the basis of a plurality of synchronous signal blocks configured under an authorized spectrum channel, and then one or more synchronous signal blocks are selected for transmitting the synchronous signals after network equipment performs channel monitoring within a preset time length, so that the purpose of transmitting the synchronous signals under an unauthorized spectrum channel is achieved, the opportunity of transmitting the synchronous signals is increased, and the success rate of downlink synchronization of a terminal and the network equipment is improved.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for transmitting a synchronization signal.
Background
Under a licensed spectrum of a New Radio (NR) communication system, each Synchronization Signal Block (SSB) occupies 4 consecutive symbols in a time domain, and is sequentially distributed in the time domain as a Primary Synchronization Signal (PSS), a Physical Broadcast Channel (PBCH), a Secondary Synchronization Signal (SSS) + PBCH (SSS is 12 RBs in the middle, and PBCH is 4 RBs on both sides). The subcarrier spacing of the synchronization signal block may be 15KHz, 30KHz, 120KHz, 240 KHz. All synchronization signal blocks are transmitted within a preset duration, within which the maximum number of synchronization signal blocks is 4, 8 or 64.
In the unlicensed spectrum of the NR communication system, the unlicensed spectrum channel is not always in an available state, and the base station needs to monitor whether the unlicensed spectrum channel is in an idle state before transmitting the downlink signal, and may transmit the downlink signal only if the unlicensed spectrum channel is in the idle state. For example: when the subcarrier interval of the synchronization signal block is 15kHz, the preset duration includes 4 SSBs: SSB # 0 to SSB # 3, SSB #0 is located at symbols 2 to 5 of slot 0, SSB #1 is located at symbols 8 to 11 of slot 1, SSB #2 is located at symbols 2 to 5 of slot 2, and SSB # 3 is located at symbols 8 to 11 of slot 3. If the base station does not hear the unlicensed spectrum channel as idle before symbol 2 of slot 0, then the synchronization signal on SSB # 0 will not be able to be transmitted. If the base station continues to not hear the unlicensed spectrum channel as idle before symbol 8 of slot 0, then the synchronization signal on SSB # 1 will not be able to be transmitted. As can be seen, since the channel of the unlicensed spectrum channel preempts the base station, there are fewer opportunities to transmit the synchronization signal, which may result in that a terminal (UE) cannot perform time domain synchronization with the base station.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a method and an apparatus for transmitting a synchronization signal. The probability of successful transmission of the synchronization signal may be increased in the unlicensed spectrum.
In order to solve the above technical problem, the present application provides a method for transmitting a synchronization signal, including:
the method comprises the steps that network equipment monitors a channel state of an unlicensed spectrum channel within a preset time length, and when the unlicensed spectrum channel is monitored to be in an idle state, the network equipment determines r synchronous signal blocks from the r synchronous signal blocks according to the occupation time of the unlicensed spectrum channel; the method comprises the steps that m is the maximum number of synchronous signal blocks included in preset time duration, m is related to a currently used subcarrier interval, m synchronous signal frequency domain resources comprise p synchronous signal blocks of the subcarrier interval k under an authorized spectrum channel, m synchronous signal blocks comprise r synchronous signal blocks, the number s of time slots included in the preset time duration is related to the subcarrier interval k, m is larger than p, m is larger than r, and m, p, k, s and r are integers larger than 0. The network equipment sends r synchronous signals to the terminal equipment on r synchronous signal blocks; wherein each synchronization signal carries a synchronization signal block index.
In the embodiment of the invention, on the basis of a plurality of synchronous signal blocks configured under an authorized spectrum channel, a plurality of synchronous signal blocks are newly added in the preset time length, then the network equipment performs channel monitoring in the preset time length and selects one or more synchronous signal blocks to perform synchronous signal transmission, thus the purpose of transmitting synchronous signals under an unauthorized spectrum channel is realized, the opportunity of synchronous signal transmission is increased, and the success rate of downlink synchronization of the terminal and the network equipment is improved.
In one possible design, the m sync signal blocks do not overlap with each other. That is, any two adjacent synchronization signal blocks in the m synchronization signal blocks may be continuously distributed or discontinuously distributed, and the present application is not limited thereto.
In one possible design, the preset duration is 5ms, the subcarrier interval k is 15kHz, the number of time slots s of the preset duration is 5, the number p of synchronization signal blocks under the licensed spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
In one possible design, each of the m sync signal blocks is non-consecutively distributed. That is, any two adjacent synchronization signal blocks in the m synchronization signal blocks must be distributed in a manner of being associated with each other, i.e., any two adjacent synchronization signal blocks must be separated by one or more symbols.
In one possible design, the m synchronization signal blocks include two adjacent synchronization signal blocks that partially overlap. I.e., any two adjacent ones of the m synchronization signal blocks, may be in a continuous distribution (non-overlapping but not spaced apart symbols), a non-continuous distribution (non-overlapping but spaced apart by one or more symbols), or partially overlapping.
In one possible design, the sync signal block index of the m sync signal blocks is represented by a bit number, the number of bits being related to m.
In one possible design, the sync signal block index of the sync signal block is represented by a bit, the number of bits is related to p, m-p sync signal blocks except for p sync signal blocks among the m sync signal blocks, and the sync signal block index of any one sync signal block among the m-p sync signal blocks is a randomly selected one of the p sync signal blocks.
In a second aspect, the present application provides a method for receiving a synchronization signal, including:
the method comprises the steps that a terminal device receives r synchronous signals from a network device within a preset time length according to the occupied time of an unlicensed spectrum channel; each synchronizing signal carries a synchronizing signal block index, the synchronizing signal block index represents the serial number of a synchronizing signal block where the synchronizing signal is located, m synchronizing signal blocks are preset in preset time length, m is related to the current subcarrier interval, the m synchronizing signal blocks comprise p synchronizing signal blocks of a subcarrier k under an authorized spectrum channel, r synchronizing signal blocks belong to the m synchronizing signal blocks, the time slot number s contained in the preset time length is related to the subcarrier interval k, m is greater than p, and m is greater than r; and the terminal equipment determines the time domain position of the synchronous signal block where the synchronous signal is located according to the synchronous signal block index.
In one possible design, the synchronization signal blocks in the m synchronization signal blocks do not overlap with each other.
In a third aspect, an apparatus is provided, which may implement the transmission method of the synchronization signal in the first aspect or the second aspect. For example, the apparatus may be a chip (such as a baseband chip, or a communication chip, etc.) or a terminal device. The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.
In one possible implementation manner, the structure of the apparatus includes a processor, a memory; the processor is configured to support the apparatus to perform corresponding functions in the above-described communication method. The memory is used for coupling with the processor, which holds the necessary programs (instructions) and/or data for the device. Optionally, the communication apparatus may further include a communication interface for supporting communication between the apparatus and other network elements.
In another possible implementation manner, the apparatus may include a unit module for performing corresponding actions in the above method.
In yet another possible implementation, the wireless communication device includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is configured to execute a computer program or instructions to control the transceiver to receive and transmit information; the processor is further configured to implement the above-described method when the processor executes the computer program or instructions. The transceiver may be a transceiver, a transceiver circuit, or an input/output interface. When the communication device is a chip, the transceiver is a transceiver or an input/output interface.
When the device is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the communication device is a network device, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.
Yet another aspect of the present application provides an apparatus, comprising: a memory and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program codes stored in the memory and execute the method of the aspects.
Yet another aspect of the present application provides a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform the method of the above-described aspects.
Yet another aspect of the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above-described aspects.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;
fig. 2a is a schematic flow chart illustrating a sending method of a synchronization signal according to an embodiment of the present invention.
Fig. 2b is a schematic diagram of the time domain distribution of the synchronization signal blocks in the licensed spectrum according to the embodiment of the present invention;
fig. 2c is a schematic diagram of the time domain distribution of the synchronization signal blocks in the unlicensed spectrum according to the embodiment of the present invention;
fig. 2d is a schematic diagram of the time domain distribution of the sync signal blocks in the licensed spectrum according to the embodiment of the present invention;
fig. 2e is a schematic time domain distribution diagram of a synchronization signal block in an unlicensed spectrum according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
FIG. 4 is another schematic diagram of an apparatus according to an embodiment of the present invention;
fig. 5 is another schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
Fig. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present invention, where the communication system includes a network device and a terminal device. Fig. 1 shows 1 network device cooperating to communicate with 2 terminal devices. The communication system may be a global system for mobile communication (GSM), a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a Worldwide Interoperability for Microwave Access (WiMAX) system, a Long Term Evolution (LTE) system, a 5G communication system (e.g., new radio, NR) system, a communication system in which a plurality of communication technologies are merged (e.g., a communication system in which LTE technology and NR technology are merged), or a communication system in which a subsequent evolution is performed. It should be noted that the number and form of the network devices and the base station devices in fig. 1 are only exemplary illustrations, and do not limit the embodiments of the present invention.
In a long term evolution communication system, to support cell synchronization, two downlink synchronization signals are defined: primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS). For Time Division Duplexing (TDD) and Frequency Division Duplexing (FDD), the primary and secondary synchronization signals have the same structure, but differ in their time domain position in a Radio Frame (RF).
For a long term evolution communication system of frequency division duplex, a primary synchronization signal is transmitted on the last Orthogonal Frequency Division Multiplexing (OFDM) symbol of the 1 st slot (slot) of a subframe 0 and a subframe 5, and an auxiliary synchronization signal and the primary synchronization signal are transmitted on the same slot of the same subframe, but the auxiliary synchronization signal is located on the 2 nd from last orthogonal frequency division multiplexing symbol and is 1 OFDM symbol ahead of the primary synchronization signal. For a time division duplex long term evolution communication system, the primary synchronization signal is transmitted on the 3 rd orthogonal frequency division multiplexing symbol of the sub-frame 1 and the sub-frame 6, and the secondary synchronization signal is transmitted on the last 1 orthogonal frequency division multiplexing symbol of the sub-frame 0 and the sub-frame 5, 3 orthogonal frequency division multiplexing symbols ahead of the primary synchronization signal. The terminal equipment can identify a duplex mode of the LTE communication system according to the relative position relation of the primary synchronization signal and the secondary synchronization signal, and when the long-term evolution communication system uses the authorized spectrum, the terminal equipment receives the synchronization signal at the appointed position to obtain the physical layer cell Identity (Identity, ID) and realize wireless frame synchronization, thereby synchronizing with the cell.
In future NR communication systems, a new synchronization signal block structure is adopted. A synchronization signal block is used as a basic unit, a synchronization signal is composed of a plurality of orthogonal frequency division multiplexing symbols in a time domain, a PSS, a SSS and a physical broadcast signal (PBCH) are all transmitted in the synchronization signal block, one or more synchronization signal blocks form a synchronization signal burst (SS burst), and one or more synchronization signal bursts form a synchronization signal burst set (SS burst set), so that the application scene of high-frequency multi-beams can be supported. When the new air interface uses the authorized frequency spectrum, the synchronous signal in the wireless frame is located at the appointed position, and the terminal equipment receives the synchronous signal through the appointed position, so that the terminal equipment is synchronous with the cell.
From the sending process of the current synchronous signal, the sending position of the synchronous signal is fixed, however, when the communication system works in the unlicensed spectrum to transmit data, the network device needs to perform listen before talk flow before using the unlicensed spectrum to send the synchronous signal, and because there is uncertainty in the time when the listen before talk flow monitors that the unlicensed spectrum is idle, the network device cannot timely send the synchronous signal to the terminal device, so that the terminal device cannot synchronize with the cell.
The terminal device in the present application is a device with a wireless communication function, and may be a handheld device with a wireless communication function, an in-vehicle device, a wearable device, a computing device or other processing device connected to a wireless modem, and the like. The terminal devices in different networks may be called different names, for example: user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), terminal equipment in a 5G network or future evolution network, and the like.
The network device in this application is a device deployed in a radio access network to provide wireless communication functions, including but not limited to: a base station (e.g., a Base Transceiver Station (BTS), a node B (NodeB, NB), an evolved node B (eNB or eNodeB), a transmission node or a transmission reception point (TRP or TP) or a next generation node B (gNB) in an NR system, a base station or a network device in a future communication network), a relay station, an access point, a vehicle-mounted device, a wearable device, a Wireless-Fidelity (Wi-Fi) station, a Wireless backhaul node, a small station, a micro station, and so on.
Referring to fig. 2a, a schematic flow chart of a method for transmitting a synchronization signal according to an embodiment of the present invention is shown, where in the embodiment of the present invention, the method includes:
s201, the network equipment determines r synchronous signal blocks in the m synchronous signal blocks according to the occupied time of the unlicensed spectrum channel.
Specifically, the preset duration is a time interval, and the start time, the duration time, and the end time of the preset duration may be configured in advance, for example: the duration of the preset duration is 5ms, and the preset duration occurs periodically. m is the maximum number of the synchronization signal blocks included in the preset time duration, that is, the preset time duration includes m synchronization signal blocks at most. m is related to the currently used subcarrier spacing k, the m synchronization signal blocks include p synchronization signal blocks of the subcarrier spacing k under the authorized spectrum channel, and the number s of time slots contained in the preset time duration is related to the subcarrier spacing k.
For example: referring to fig. 2b, fig. 2b is a schematic distribution diagram of 4 synchronization signal blocks at a subcarrier interval of 15kHz, in fig. 2c, the preset duration is 5ms, the preset duration includes 5 slots (slots), each slot includes 14 symbols, each synchronization signal block corresponds to 4 symbols, and the 4 synchronization signal blocks are respectively located in the 2 nd symbol to the 5 th symbol and the 8 th symbol to the 11 th symbol of the first two slots; the sync signal block indexes of the 4 sync signal blocks are denoted by SSB # 0, SSB # 1, SSB # 2, and SSB # 3, respectively.
The network equipment monitors the state of the unlicensed spectrum channel within a preset time length, determines a transmission time window on the unlicensed spectrum channel when the unlicensed spectrum channel is monitored to be idle, and then determines complete r synchronous signal blocks in the transmission time window.
In one possible embodiment, the m sync signal blocks do not overlap with each other.
Specifically, each synchronization signal block occupies n symbols, and for time domain resources except for p synchronization signal blocks within a preset time duration, only n consecutive symbols exist, and one synchronization signal block can be configured.
For example: according to the example in fig. 2c, the white symbol in the preset duration is a time domain resource except for p sync signal blocks, and the remaining 5 × 14-4 × 4 is 54 symbols, and for the 54 symbols, 1 sync signal block can be added as long as there are 4 consecutive symbols, so that 12 sync signal blocks can be added in fig. 2c, the preset duration includes 16 sync signal blocks, and m is 16. Referring to fig. 2c, a schematic diagram of a distribution of the newly added sync signal blocks in fig. 2b is shown, in fig. 2c, where m is 16, and the preset duration includes 16 sync signal blocks.
In one possible embodiment, the preset duration is 5ms, the subcarrier interval k is 15kHz, the number of time slots s of the preset duration is 5, the number p of synchronization signal blocks under the licensed spectrum channel is 8, m is 15, the distribution positions of 8 synchronization signal blocks under the licensed spectrum channel included in the preset duration are shown in fig. 2d, and the 8 synchronization signal blocks occupy the 2 nd to 5 th symbols and the 8 th to 11 th symbols in the previous 4 time slots. The distribution positions of the 15 sync signal blocks included in the preset time period are shown in fig. 2 e.
In one possible embodiment, the preset duration is 5ms, the subcarrier interval k is 30kHz, the number of time slots s of the preset duration is 10, the number p of synchronization signal blocks under the licensed spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
Specifically, the m synchronization signal blocks are not overlapped, that is, any two adjacent synchronization signal blocks are continuously distributed or discontinuously distributed, and the distribution positions of the m synchronization signal blocks included in the preset duration of 5ms may refer to the manners of fig. 2b to 2e, which is not described herein again.
In one possible design, each of the m sync signal blocks is non-consecutively distributed.
Specifically, any two of the m synchronization signal blocks are separated by one or more symbols. And dividing the newly added synchronous signal blocks and the existing p synchronous signal blocks into synchronous signal groups, wherein each synchronous signal comprises at least one or more continuous and non-overlapping synchronous signal blocks, and each synchronous signal group is separated by 1 or more symbols. In practice, the new sync signal blocks and the existing sync signal may be distributed continuously or discontinuously. Several synchronization signals may be consecutive and then spaced one or more symbols apart before the synchronization signal. That is, it is not emphasized that there is a space between each two. This interval is mainly intended for channel listening time of unlicensed spectrum, and each beam's synchronization signal block set is transmitted before channel listening when the different synchronization signal block sets indicate different beams (beams).
It is obvious that the number of newly added synchronization signal blocks is surely equal to or less than the number of the above-mentioned synchronization signal blocks which are continuously distributed.
In one possible design, the time domains of the synchronization signals in the m synchronization signal blocks overlap with each other.
Specifically, there may be overlapping symbols between two adjacent synchronization signal blocks, and the maximum number of synchronization signal blocks included in the preset time duration when overlapping is significantly greater than the maximum number of synchronization signal blocks included in the preset time duration when not overlapping. For example: when the signals are not overlapped, the maximum number of the synchronization signal blocks included in the preset time length with the subcarrier being 15kHz is 16, the maximum number of the synchronization signal blocks included in the preset time length with the subcarrier being 30kHz is 35, the maximum number of the synchronization signal blocks included in the preset time length with the subcarrier being 120kHz is 140, and the maximum number of the synchronization signal blocks included in the preset time length with the subcarrier being 240kHz is 280. Then, when overlapping, the preset duration with subcarrier at 15kHz includes a maximum number of synchronization signal blocks greater than 16, the preset duration with subcarrier at 30kHz includes a maximum number of synchronization signal blocks greater than 35, the preset duration with subcarrier at 120kHz includes a maximum number of synchronization signal blocks greater than 140, and the preset duration with subcarrier at 240kHz includes a maximum number of synchronization signal blocks greater than 280.
In one possible embodiment, the synchronization signal block indexes of the m synchronization signal blocks are represented by bits, the number of bits is related to m, and the bits corresponding to the m synchronization signal blocks are different from each other.
For example: when the subcarrier spacing is 15kHz, m is 16, and then 4 bits are needed to represent 16 sync signal blocks. The 16 sync signal blocks are represented by 0000-1111.
The subcarrier spacing is 120kHz, m is 140, and 8 bits are used to indicate 140 synchronization signals.
At a subcarrier spacing of 240kHz, m equals 288, which needs to be represented by 9 bits to indicate 280 synchronization signals.
In one possible implementation, the synchronization signal block index of any one of the m-p synchronization signal blocks is a randomly selected one of the p synchronization signal blocks.
Specifically, the newly added synchronization signal block multiplexes a synchronization signal block index (SSB index) of an existing synchronization signal block (p synchronization signal blocks in the licensed spectrum channel), that is, downlink synchronization of a user does not need to be supported in the unlicensed spectrum channel, and the synchronization signal in the unlicensed spectrum channel is only used as a discovery reference signal for discovering a cell in which the unlicensed spectrum is located, for example: and carrying out carrier aggregation on the unlicensed spectrum and the cell where the licensed spectrum is located, wherein the unlicensed spectrum is used as the SCell secondary cell. In this case, the newly added sync signal block uniformly uses or randomly uses the index of the sync signal block of the existing sync signal block, or the newly added sync signal block uses the index of the sync signal block of the existing sync signal closest to itself.
After the newly added synchronous signal block, the network device monitors the channel state before the first synchronous signal block, and if the channel is monitored to be in an idle state, the network device sends the synchronous signal block closest to the moment when the channel is monitored to be idle. For example: when the network equipment monitors that an unauthorized frequency spectrum channel is idle before a first synchronous signal block, a synchronous signal is sent on the first synchronous signal block; and if the unauthorized spectrum channel is monitored to be in an idle state at the middle position of the first synchronous signal block, sending a synchronous signal on the second synchronous signal block.
In one possible embodiment, the maximum number of synchronization signals transmitted within a preset duration (e.g., 5ms) may also give a limit, such as: transmitting 4 synchronous signals at most in a preset time length below 3 GHz; transmitting 8 synchronous signals within a preset time length between 3GHz and 6GHz at most; and transmitting 64 synchronous signals within a preset time length above 6GHz at most.
In one possible implementation, when the synchronization signal blocks are consecutive and the channel conditions are the same (e.g., the same transmission beam), multiple consecutive synchronization signals can be transmitted on multiple consecutive synchronization signal blocks only when the unlicensed spectrum channel is monitored to be idle before the first synchronization signal block in the multiple consecutive synchronization signal blocks. When the synchronization signal blocks are not continuous or the channel conditions are different (such as different transmission beams), each synchronization signal block needs to listen to the unlicensed spectrum channel again before being in an idle state.
S202, the network equipment sends r synchronous signals to the terminal equipment on r synchronous signal blocks, and the terminal equipment receives the r synchronous signals from the network equipment.
Specifically, each synchronization signal carries a synchronization signal block index, such as: referring to fig. 2c, the synchronization signal transmitted on SSB # 0 carries a synchronization signal block index of 0.
S203, the terminal equipment determines the time domain of the synchronous signal block according to the synchronous signal block index.
Specifically, the terminal device prestores or preconfigures a mapping relationship between a synchronization signal block index and a time domain position, and the terminal device determines the time domain position of a synchronization signal block that sends the synchronization signal according to the synchronization signal block index carried in the synchronization signal. For example: the terminal equipment determines that the synchronous signal block index carried by the synchronous signal is 1, and the terminal equipment determines that the synchronous signal block for sending the synchronous signal is positioned from symbol 8 to symbol 11 of a time slot 0 with preset duration.
On the basis of a plurality of synchronous signal blocks configured under an authorized spectrum channel, a plurality of synchronous signal blocks are newly added in a preset time length, then the network equipment performs channel monitoring in the preset time length and selects one or more synchronous signal blocks to perform synchronous signal transmission, so that the purpose of transmitting synchronous signals under an unauthorized spectrum channel is achieved, the opportunity of synchronous signal transmission is increased, and the success rate of downlink synchronization of the terminal and the network equipment is improved.
Fig. 2a illustrates a transmission method of a synchronization signal according to an embodiment of the present application in detail.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, where the apparatus 3 may include a processing unit 301 and a sending unit 302.
A processing unit 301, configured to determine r synchronization signal blocks from m synchronization signal blocks according to an occupation time of an unlicensed spectrum channel; the method comprises the steps that m is the maximum number of synchronous signal blocks included in a preset time length, m is related to a current subcarrier interval k, m synchronous signal blocks comprise p synchronous signal blocks of the subcarrier interval k under an authorized spectrum channel, and the number s of time slots included in the preset time length is related to the subcarrier interval k; m > p and m > r, m, p, k, s and r being integers greater than 0.
A sending unit 302, configured to send r synchronization signals to a terminal device on the r synchronization signal blocks; wherein each synchronization signal carries a synchronization signal block index.
In one possible implementation, the m sync signal blocks do not overlap with each other.
In one possible embodiment, the preset duration is 5ms, the subcarrier spacing k is 15kHz, the number of time slots s of the preset duration is 5, the number p of synchronization signal blocks in the licensed spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
The device 3 may be a network device, and the device 3 may also be a field-programmable gate array (FPGA), an application-specific integrated chip (asic), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit, a Micro Controller Unit (MCU), or a Programmable Logic Device (PLD) or other integrated chips.
The embodiment of the present invention and the embodiment of the method in fig. 2a are based on the same concept, and the technical effects brought by the embodiment of the present invention are also the same, and the specific process can refer to the description of the embodiment of the method in fig. 2a, and will not be described again here.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, where the apparatus 4 may include a receiving unit 401 and a processing unit 402.
A receiving unit 401, configured to receive r synchronization signals from a network device within a preset time period according to an occupied time of an unlicensed spectrum channel; each synchronization signal carries a synchronization signal block index, the synchronization signal block index represents the sequence number of a synchronization signal block where the synchronization signal is located, m is the maximum number of synchronization signal blocks included in the preset time duration, m is related to the current subcarrier interval k, the m synchronization signal blocks include p synchronization signal blocks of the subcarrier interval k under an authorized spectrum channel, the r synchronization signal blocks belong to the m synchronization signal blocks, and the number s of time slots included in the preset time duration is related to the subcarrier interval k; m > p and m > r.
A processing unit 402, configured to determine a time domain position of a synchronization signal block of each synchronization signal according to the synchronization signal block index.
In one possible implementation, the m sync signal blocks do not overlap with each other.
In one possible embodiment, the preset duration is 5ms, the subcarrier interval k is 15kHz, the number of time slots s of the preset duration is 5, the number p of synchronization signal blocks in the licensed spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
In one possible embodiment, each of the m synchronization signal blocks is non-consecutively distributed.
In one possible implementation, the m synchronization signal frequency domain resources are partially overlapped with each other.
In a possible embodiment, the synchronization signal block index of the m synchronization signal blocks is represented by a bit, the number of bits being related to m.
In one possible embodiment, the sync signal block indexes of the m sync signal blocks are represented by bits, the number of bits of the bits is related to p, m-p sync signal blocks except for the p sync signal blocks in the m sync signal blocks, and the sync signal block index of any one sync signal block in the m-p sync signal blocks is a randomly selected one of the p sync signal blocks.
The device 4 may be a terminal device, and the device 4 may also be a field-programmable gate array (FPGA), an application-specific integrated chip (asic), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit, a Micro Controller Unit (MCU), or a Programmable Logic Device (PLD) or other integrated chips.
The embodiment of the present invention and the embodiment of the method in fig. 2a are based on the same concept, and the technical effects brought by the embodiment of the present invention are also the same, and the specific process can refer to the description of the embodiment of the method in fig. 2a, and will not be described again here.
Fig. 5 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, which is hereinafter referred to as an apparatus 5, where the apparatus 5 may be integrated in the foregoing transmitting device or receiving device, as shown in fig. 5, the apparatus includes: memory 502, processor 501, transmitter 504, and receiver 503.
The memory 502 may be a separate physical unit, which may be connected to the processor 501, the transmitter 504 and the receiver 503 by a bus. The memory 502, the processor 501, the transmitter 504, and the receiver 501 may also be integrated, implemented in hardware, etc.
The memory 502 is used for storing a program for implementing the above method embodiment, or various modules of the apparatus embodiment, and the processor 901 calls the program to perform the operations of the above method embodiment.
Alternatively, when part or all of the transmission method of the synchronization signal of the above embodiment is implemented by software, the apparatus may also include only the processor. The memory for storing the program is located outside the device and the processor is connected to the memory by means of circuits/wires for reading and executing the program stored in the memory.
The processor may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.
The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.
The memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory may also comprise a combination of memories of the kind described above.
In the above embodiments, the sending module or the transmitter performs the sending steps of the above various method embodiments, the receiving module or the receiver performs the receiving steps of the above various method embodiments, and other steps are performed by other modules or processors. The transmitting module and the receiving module may constitute a transceiver module, and the receiver and the transmitter may constitute a transceiver.
The embodiment of the present application further provides a computer storage medium, which stores a computer program, where the computer program is used to execute the transmission method of the synchronization signal provided in the foregoing embodiment.
The embodiment of the present application further provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the transmission method of the synchronization signal provided by the above embodiment.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (20)
1. A method for transmitting a synchronization signal, comprising:
the network equipment determines r synchronous signal blocks in the m synchronous signal blocks according to the occupied time of the unlicensed spectrum channel; the method comprises the steps that m is the maximum number of synchronous signal blocks included in a preset time length, m is related to a current subcarrier interval k, m synchronous signal blocks comprise p synchronous signal blocks of the subcarrier interval k under an authorized spectrum channel, and the number s of time slots included in the preset time length is related to the subcarrier interval k; m > p and m > r, m, p, k, s and r being integers greater than 0;
the network equipment sends r synchronous signals to the terminal equipment on the r synchronous signal blocks; wherein each synchronization signal carries a synchronization signal block index.
2. The method of claim 1, wherein each of the m sync signal blocks does not overlap with each other.
3. The method of claim 2,
the preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
4. A method for transmitting a synchronization signal, comprising:
the method comprises the steps that a terminal device receives r synchronous signals from a network device within a preset time length according to the occupied time of an unlicensed spectrum channel; each synchronization signal carries a synchronization signal block index, the synchronization signal block index represents the sequence number of a synchronization signal block where the synchronization signal is located, m is the maximum number of synchronization signal blocks included in the preset time duration, m is related to the current subcarrier interval k, the m synchronization signal blocks include p synchronization signal blocks of the subcarrier interval k under an authorized spectrum channel, the r synchronization signal blocks belong to the m synchronization signal blocks, and the number s of time slots included in the preset time duration is related to the subcarrier interval k; m > p and m > r, m, p, k, s and r being integers greater than 0;
and the terminal equipment determines the time domain position of the synchronous signal block of each synchronous signal according to the synchronous signal block index.
5. The method of claim 4, wherein each of the m synchronization signal blocks does not overlap with each other.
6. The method of claim 5,
the preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
7. The method of claim 4, wherein each of the m synchronization signal blocks is non-contiguously distributed.
8. The method of claim 4, wherein the m synchronization signal frequency domain resources are partially overlapped with each other.
9. The method according to any of claims 4 to 8, wherein the synchronization signal block indices of the m synchronization signal blocks are represented by bits, the number of bits being related to m.
10. The method according to any one of claims 4 to 8, wherein the sync signal block indexes of the m sync signal blocks are expressed by bits, the number of bits is related to p, m-p sync signal blocks except for the p sync signal blocks in the m sync signal blocks have a sync signal block index of any one of the m-p sync signal blocks being a randomly selected one of the p sync signal blocks.
11. A device for transmitting a synchronization signal, comprising:
the processing unit is used for determining r synchronous signal blocks in the m synchronous signal blocks according to the occupied time of the unlicensed spectrum channel; the method comprises the steps that m is the maximum number of synchronous signal blocks included in a preset time length, m is related to a current subcarrier interval k, m synchronous signal blocks comprise p synchronous signal blocks of the subcarrier interval k under an authorized spectrum channel, and the number s of time slots included in the preset time length is related to the subcarrier interval k; m > p and m > r, m, p, k, s and r being integers greater than 0;
a sending unit, configured to send r synchronization signals to a terminal device on the r synchronization signal blocks; wherein each synchronization signal carries a synchronization signal block index.
12. The apparatus of claim 11, wherein each of the m synchronization signal blocks does not overlap with each other.
13. The apparatus of claim 12,
the preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
14. A device for transmitting a synchronization signal, comprising:
a receiving unit, configured to receive r synchronization signals from a network device within a preset time period according to an occupation time of an unlicensed spectrum channel; each synchronization signal carries a synchronization signal block index, the synchronization signal block index represents the sequence number of a synchronization signal block where the synchronization signal is located, m is the maximum number of synchronization signal blocks included in the preset time duration, m is related to the current subcarrier interval k, the m synchronization signal blocks include p synchronization signal blocks of the subcarrier interval k under an authorized spectrum channel, the r synchronization signal blocks belong to the m synchronization signal blocks, and the number s of time slots included in the preset time duration is related to the subcarrier interval k; m > p and m > r, m, p, k, s and r being integers greater than 0;
and the processing unit is used for determining the time domain position of the synchronous signal block of each synchronous signal according to the synchronous signal block index.
15. The apparatus of claim 14, wherein each of the m synchronization signal blocks does not overlap with each other.
16. The apparatus of claim 15,
the preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 16; or
The preset time length is 5ms, the subcarrier interval k is 15kHz, the time slot number s of the preset time length is 5, the number p of the synchronous signal blocks under the authorized spectrum channel is 8, and m is 15; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 33; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 32; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of the synchronous signal blocks under the authorized spectrum channel is 4, and m is 35; or
The preset time length is 5ms, the subcarrier interval k is 30kHz, the time slot number s of the preset time length is 10, the number p of synchronous signal frequency domain resources under an authorized spectrum channel is 8, and m is 34; or
The preset time length is 5ms, the subcarrier interval k is 120kHz, the time slot number s of the preset time length is 40, the number p of synchronous signal frequency domain resources under the authorized frequency spectrum is 64, and m is 140; or
The preset time length is 5ms, the subcarrier interval k is 240kHz, the time slot number s of the preset time length is 80, the number p of the synchronization signal blocks under the authorized frequency spectrum is 64, and m is 280.
17. The apparatus of claim 14, wherein each of the m synchronization signal blocks is non-contiguously distributed.
18. The apparatus of claim 14, wherein the m synchronization signal frequency domain resources are partially overlapped with respect to each synchronization signal block.
19. The apparatus according to any one of claims 14 to 18, wherein the synchronization signal block indexes of the m synchronization signal blocks are represented by bits, and the number of bits is related to m.
20. The apparatus according to any one of claims 14 to 18, wherein the synchronization signal block indexes of the m synchronization signal blocks are represented by bits, the number of bits is related to p, m-p synchronization signal blocks except for the p synchronization signal blocks in the m synchronization signal blocks have a synchronization signal block index of any one of the m-p synchronization signal blocks being a randomly selected one of the p synchronization signal blocks.
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| CN111294178B (en) * | 2019-01-11 | 2022-09-09 | 北京紫光展锐通信技术有限公司 | Method and device for determining monitoring time of physical downlink control channel |
| CN111756509B (en) * | 2019-03-29 | 2022-04-29 | 华为技术有限公司 | Method and device for transmitting common signal block |
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| CN114339974B (en) * | 2019-06-14 | 2023-07-18 | Oppo广东移动通信有限公司 | Wireless communication method, terminal equipment and network equipment |
| WO2021012255A1 (en) * | 2019-07-25 | 2021-01-28 | 北京小米移动软件有限公司 | Synchronization signal block transmission method, receiving method, apparatus, device, and medium |
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