WO2019020011A1

WO2019020011A1 - Method and apparatus for sending and receiving synchronization signal

Info

Publication number: WO2019020011A1
Application number: PCT/CN2018/096817
Authority: WO
Inventors: 贾琼; 朱俊; 张佳胤; 庞继勇; 范巍巍
Original assignee: 华为技术有限公司
Priority date: 2017-07-24
Filing date: 2018-07-24
Publication date: 2019-01-31
Also published as: CN109302739B; CN112492623A; CN109302739A; CN112492623B

Abstract

Disclosed in the present application are a method and apparatus for sending a synchronization signal. When a network device detects that a channel is idle, the network device sends at least one of a synchronization signal and synchronization signal time information to a terminal device at a first time-domain position; and the terminal device can obtain an actual time-domain position of the synchronization signal according to the synchronization signal time information, so that the terminal device can accurately receive the synchronization signal at a specified time-domain position, so as to implement uplink synchronization.

Description

Method, device and device for transmitting synchronization signal

Technical field

The present invention relates to the field of communications, and in particular, to a method, a receiving method and a device for transmitting a synchronization signal.

Background technique

Spectrum resources are scarce resources for wireless communication. In order to improve the utilization of spectrum resources, it is currently considered to apply unlicensed spectrum resources to wireless communication systems, for example, in long term evolution (LTE) or new radio (new radio, Unlicensed spectrum resources are used in NR). Unlicensed spectrum resources need to be used in a competitive manner. The station monitors whether the unlicensed spectrum is idle before sending data. When the unlicensed spectrum is idle, data can be sent on the unlicensed spectrum. Otherwise, the data cannot be sent. The mechanism sent after listening is called the listen before talk (LBT) mechanism.

Before the data transmission is performed by the user equipment (UE), the user equipment needs to receive the synchronization signal sent by the station, and access the network according to the synchronization signal to synchronize with the cell in the network. Before the site uses the unlicensed spectrum to send the synchronization signal, it needs to perform the listening and speaking process. However, because the first time after listening to the unconscious spectrum is idle, the station cannot send the synchronization signal to the user equipment in time. Therefore, the user equipment cannot synchronize with the cell.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and a device for transmitting a synchronization signal, which can implement cell synchronization on an unlicensed spectrum of a terminal device.

In a first aspect, the present application provides a method for transmitting a synchronization signal, including: performing network channel interception, and in case the channel listening result is idle, the network device sends synchronization to the terminal device in the first time domain location. Signal and/or synchronization signal time information, the first time domain position coincides with a preset transmission start time of the synchronization signal or the first time domain position coincides with a preset transmission start time of the synchronization signal, the first time domain position and time The cell boundaries are aligned.

The channel is a spectrum resource of a certain frequency range, and the spectrum resource is an unlicensed spectrum resource. The method for detecting whether the network device is idle is to measure the received power on the channel within the preset duration. If the received power is less than the preset threshold, the channel is in an idle state, and the channel is in a busy state. The network device stores a preset time domain location of the synchronization signal to be sent, and the preset time domain location includes a preset transmission start time, a preset transmission termination time, and a duration. The first time domain location coincides with a preset transmission start time of the synchronization signal or after a preset transmission start time. The time unit is a minimum time granularity used for data transmission by the network device and the terminal device. For example, the time unit is any one of a symbol, a time slot, a transmission time interval (TTI), and a subframe, where the time slot may be For a mini slot, the transmission time interval may be a short transmission time interval (short TTI); the time unit boundary may be a start boundary or a termination boundary of the time unit. The synchronization signal time information is used to indicate that the terminal device knows the actual time domain location of the synchronization signal.

In an embodiment of the present invention, the network device sends at least one of a synchronization signal and a synchronization signal time information to the terminal device in the first time domain position when the channel is idle, and the terminal device can learn the synchronization signal according to the synchronization signal time information. The actual time domain location, so that the terminal device can accurately receive the synchronization signal at the specified time domain location, thereby implementing uplink synchronization.

In a possible design, the network device detects that the channel is idle in the second time domain location, and the second time domain location is not aligned with the time unit boundary, and the second time domain location is located before the first time domain location, the network The device can send the synchronization signal time information between the second time domain location and the first time domain location, thereby reducing the occupation of the time domain resource of the synchronization signal and improving the reliability of the synchronization signal transmission.

In another possible design, the synchronization signal includes n synchronization signal blocks, and the start boundary of the first synchronization signal block in the n synchronization signal blocks is aligned with the first time domain position, and each of the n synchronization signal blocks The relative position of the sync signal block remains unchanged, and n is an integer greater than zero.

The synchronization signal is transmitted by using a synchronization signal block (SSB), the synchronization signal includes n synchronization signal blocks, the synchronization signal block represents a time-frequency resource, and the n synchronization signal blocks can be continuously distributed or discontinuously distributed. The start boundary of the first sync signal block in the n sync signal blocks is aligned with the first time domain position, and the order of arrangement of each sync signal block in the n sync signal blocks remains unchanged. In this embodiment, the network device translates the synchronization signal by means of an overall translation, so that the start position of the synchronization signal is aligned with the first time domain position.

In still another possible design, the synchronization signal time information includes: at least one of a subframe index, a symbol index, a slot index, and a transmission time interval index corresponding to the first time domain location; or

At least one of a subframe offset, a symbol offset, a slot offset, and a TTI offset between the first time domain location and the preset start transmission time of the synchronization signal.

In yet another possible design, the synchronization signal includes n synchronization signal blocks, the first time domain position is aligned with the start boundary of the i-th synchronization signal block of the n synchronization signal blocks, and the n synchronization signal blocks are The relative positions of the 1 to i-1 sync signal blocks remain unchanged; the relative positions of the ith to n sync signal blocks remain unchanged, and the 1st to i-1 sync signal blocks are after the nth sync signal block or The start boundary of the first sync signal block is aligned with the end boundary of the n sync signal blocks, n is an integer greater than 1, 2 ≤ i ≤ n, and i is an integer.

The actual time domain position of the i-th to n-th sync signal blocks in the n sync signal blocks is the same as the preset time domain position, and the actual time domain position and the preset time domain of the first to i-1 sync signal blocks The location is different. The order of arrangement of the first to ith-1th sync signal blocks in the n sync signal blocks is unchanged, the order of the i-th to nth sync signal blocks is unchanged, and the first sync signal block is at the nth sync signal. The start boundary of the block or the i-th sync signal block is aligned with the end boundary of the n-th sync signal block. In this embodiment, the network device uses a local translation manner to translate the synchronization signal block before the first time domain position, and the time domain position of the synchronization signal block after the first time domain position remains unchanged, thereby reducing the calculation amount.

In yet another possible design, the synchronization signal time information includes:

At least one of a subframe index, a symbol index, a slot index, and a TTI index of an actual time domain position of the first synchronization signal block to the i-1th synchronization signal block in the n synchronization signal blocks; or

Subframe offset, symbol offset, time slot between the actual time domain position of the first sync signal block to the i-1th sync signal block and the preset time domain position among the n sync signal blocks At least one of an offset and a TTI offset.

In yet another possible design, the distance between the first time domain location and the preset transmission start time of the synchronization signal is less than the preset distance.

For a radio frame, the synchronization signal must be sent before the end of the specified subframe. For example, the distance between the first time domain location and the preset transmission start time must ensure that the synchronization signal ends at the fifth subframe. After the previous transmission is completed, if the distance between the first time domain location and the preset transmission start time is greater than the preset distance, the network device may resend the synchronization signal in the next wireless frame.

In yet another possible design, the network device performing channel sounding includes:

The network device listens to each subband in the system frequency band;

When detecting that one or more sub-bands are in an idle state, the network device transmits indication information of the one or more sub-bands of the idle state to the terminal device in the first time domain location.

The system frequency band is a spectrum resource of a specified frequency range, and the system frequency band is divided into multiple sub-bands. The bandwidth of the sub-band is not limited in this application. The sub-band includes multiple sub-carriers, and the sub-carrier is the minimum granularity frequency used by the network device and the terminal device. Domain resources, the number of subcarriers included in each subband is not limited in this application.

In yet another possible design, the indication information includes: a subcarrier index of the synchronization signal, an index of the one or more subbands in an idle state, a bandwidth of the one or more subbands in an idle state, an idle state The number of the one or more sub-bands, the bandwidth of the system band, the index of other sub-bands of the one or more sub-bands in the system band except the idle state, and the idle state of the system band At least one of the number of other sub-bands of the one or more sub-bands and a bandwidth of other sub-bands of the one or more sub-bands other than the idle state in the system band.

In a second aspect, the present application provides a method for receiving a synchronization signal, including: receiving, by a terminal device, synchronization signal time information sent by a network device; and determining, by the terminal device, an actual time domain position of the synchronization signal according to the synchronization signal time information; Receiving, by the terminal device, the synchronization signal sent by the network device in the actual time domain location.

The terminal device is located in a cell of the unlicensed spectrum, and the terminal device needs to synchronize with the cell before transmitting the data. When the cell of the unlicensed spectrum is idle, the terminal device can use the unlicensed spectrum to transmit data, and the network device performs channel interception on the unlicensed spectrum. When the listening result is idle, the network device sends a synchronization signal to the terminal device. / or synchronization signal time information, the synchronization signal time information represents the actual time domain position of the synchronization signal, or the offset between the preset transmission start time of the synchronization signal and the actual transmission start time, so that the terminal device according to the synchronization signal time The information can accurately receive the synchronization signal and complete the process of cell synchronization.

In a possible design, the terminal device receives the synchronization signal time information sent by the network device, and further includes:

The terminal device receives indication information sent by the network device, where the indication information indicates a frequency domain location of one or more subbands in an idle state in a system frequency band.

The terminal device determines the actual frequency domain location of the synchronization signal according to the indication information, and the terminal device receives the synchronization signal sent by the network device according to the actual time domain location and the actual frequency domain location.

In still another aspect, a transmitting device for synchronizing signals, hereinafter referred to as a transmitting device, having the function of implementing the behavior of a network device in the above method is provided. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the transmitting apparatus includes: a listening unit and a transmitting unit; wherein the processor is configured to perform channel sensing; and the sending unit is configured to listen to the channel In the case of being idle, the synchronization signal and/or the synchronization signal time information is sent to the terminal device at the first time domain location; wherein the first time domain location is after the preset transmission start time of the synchronization signal or The first time domain location coincides with a preset transmission start time of the synchronization signal, and the first time domain location is aligned with a time unit boundary.

In another possible design, the transmitting device includes: a transceiver, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to invoke program code stored in the memory, Performing the following operations: performing channel listening; the transceiver, configured to send synchronization signal and/or synchronization signal time information to the terminal device in the first time domain position if the listening result of the channel is idle; The first time domain location coincides with a preset transmission start time of the synchronization signal or the first time domain location coincides with a preset transmission start time of the synchronization signal, the first time domain The position is aligned with the time unit boundary.

Based on the same inventive concept, the principle and the beneficial effects of the device can be referred to the method embodiments of the foregoing possible network devices and the beneficial effects thereof. Therefore, the implementation of the device can refer to the implementation of the method, and the repetition is not Let me repeat.

In still another aspect, a receiving device for a synchronization signal is provided, hereinafter referred to as a receiving device, which has a function of implementing the behavior of a terminal device in the above method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the receiving device includes: a receiving unit and a determining unit, configured to receive synchronization signal time information sent by the network device, and a determining unit, configured to determine the synchronization signal according to the synchronization signal time information The actual time domain location; the receiving unit is further configured to receive the synchronization signal sent by the network device at the actual time domain location.

In another possible design, the receiving device includes: a transceiver, a memory, and a processor; wherein the transceiver is configured to receive synchronization signal time information sent by the network device; and the memory stores a set of program codes And the processor is configured to invoke the program code stored in the memory, and perform an operation of: determining an actual time domain position of the synchronization signal according to the synchronization signal time information; and the transceiver is further configured to be in the actual time The domain location receives the synchronization signal sent by the network device.

Based on the same inventive concept, the principle and the beneficial effects of the device can be referred to the method embodiments of the foregoing possible terminal devices and the beneficial effects thereof. Therefore, the implementation of the device can refer to the implementation of the method, and the repetition is not Let me repeat.

Yet another aspect of the present application is directed to a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the methods described in the various aspects above.

Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the various aspects above.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings to be used in the embodiments of the present invention or the background art will be described below.

1a is a network architecture diagram of a communication system according to an embodiment of the present invention;

1b is a schematic structural diagram of a synchronization signal according to an embodiment of the present invention;

2a is a schematic flowchart of a method for transmitting a synchronization signal according to an embodiment of the present invention;

2b is a schematic diagram of a principle for monitoring spectrum idleness according to an embodiment of the present invention;

2c is a schematic diagram of a rule for monitoring a spectrum according to an embodiment of the present invention;

2d is another schematic diagram of a rule for monitoring a spectrum according to an embodiment of the present invention;

2e is another schematic diagram of a rule for monitoring a spectrum according to an embodiment of the present invention;

2f is another schematic diagram of a rule for monitoring a spectrum according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a time domain listening rule according to an embodiment of the present invention; FIG.

FIG. 3b is another schematic diagram of a time domain listening rule according to an embodiment of the present invention;

FIG. 3c is another schematic diagram of a time domain listening rule according to an embodiment of the present invention;

4 is a schematic structural diagram of a synchronization signal sending apparatus according to an embodiment of the present invention;

5 is another schematic structural diagram of a synchronization signal sending apparatus according to an embodiment of the present invention;

6 is a schematic structural diagram of a synchronization signal receiving apparatus according to an embodiment of the present invention;

FIG. 7 is another schematic structural diagram of a synchronization signal receiving apparatus according to an embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

1a is a schematic structural diagram of a communication system according to an embodiment of the present invention. The communication system includes a network device and a terminal device. Figure 1a shows 1a network device cooperation 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, and a global microwave system. Worldwide interoperability for microwave access (WiMAX) system, long term evolution (LTE) system, 5G communication system (such as new radio (NR)) system, and communication system with multiple communication technologies ( For example: a communication system in which LTE technology and NR technology are integrated, or a subsequent evolution communication system. It should be noted that the number and the configuration of the network device and the base station device in FIG. 1a are merely exemplary descriptions, and are not limited to the embodiments of the present invention.

In the long term evolution communication system, in order to support cell synchronization, two downlink synchronization signals are defined: a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). For time division duplexing (TDD) and frequency division dual (FDD), the structure of the primary synchronization signal and the secondary synchronization signal are the same, but in a radio frame (RF) The location of the domain is different.

For a long-term evolution communication system with frequency division duplex, the last orthogonal frequency division multiplexing (OFDM) symbol of the primary synchronization signal in the first slot of subframe 0 and subframe 5 On the upper transmission, the secondary synchronization signal and the primary synchronization signal are transmitted on the same time slot of the same subframe, but the secondary synchronization signal is located on the second orthogonal frequency division multiplexing symbol, and is orthogonal to the primary synchronization signal by one orthogonal frequency. Sub-multiplex symbol. For a time division duplex long term evolution communication system, the primary synchronization signal is transmitted on the third orthogonal frequency division multiplexing symbol of subframe 1 and subframe 6, and the secondary synchronization signal is at the last of subframe 0 and subframe 5. Transmitted on orthogonal frequency division multiplexing symbols, three orthogonal frequency division multiplexing symbols are advanced ahead of the primary synchronization signal. The terminal device may identify a duplex mode for the LTE communication system according to the relative positional relationship between the primary synchronization signal and the secondary synchronization signal. When the long-term evolution communication system uses the licensed spectrum, the terminal device obtains the physical layer cell identity by receiving the synchronization signal at the designated location. (Identity, ID), realizes wireless frame synchronization, thereby synchronizing with the cell.

Referring to Figure 1b, a new sync signal structure is employed in the future new air interface. The synchronization signal block is used as a basic unit, and the synchronization signal block is composed of a plurality of orthogonal frequency division multiplexing symbols in the time domain, and PSS, SSS and physical broadcast channel (PBCH) are transmitted in the synchronization signal block, one Or a plurality of 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), thereby supporting Application scenarios for high frequency multi-beam. When the licensed spectrum is used in the new air interface, the synchronization signal block in the radio frame is located at the designated location, and the terminal device receives the synchronization signal through the designated location, thereby synchronizing with the cell.

From the current transmission process of the synchronization signal, the transmission position of the synchronization signal is fixed. However, when the communication system works in the unlicensed spectrum transmission data, the network equipment needs to listen before sending the synchronization signal using the unlicensed spectrum. In the process, the network device cannot send a synchronization signal to the terminal device in time, because the process of listening to the process of monitoring the unlicensed spectrum is idle, and the terminal device cannot synchronize with the cell.

The terminal device in the present application is a device having a wireless communication function, and may be a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem. Terminal devices in different networks may be called different names, such as: user equipment, access terminals, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, remote terminals, mobile devices, user terminals, terminals, wireless communications. Device, user agent or user device, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), Terminal equipment in a 5G network or a future evolution network.

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 (for example, a base transceiver station (BTS), a Node B (NodeB, NB), Evolved base station B (eNB or eNodeB), a transmission node or transmission reception point (TRP or TP) in the NR system, or a generation node B (gNB), a base station in a future communication network Or network equipment), relay stations, access points, in-vehicle devices, wearable devices, Wireless-Fidelity (Wi-Fi) sites, wireless backhaul nodes, small stations, micro stations, and so on.

Referring to FIG. 2a, FIG. 2a is a schematic flowchart of a method for sending a synchronization signal according to an embodiment of the present invention, where the method includes but is not limited to the following steps:

S201. The network device performs channel sensing.

The channel is a spectrum resource of a specified frequency range, and the spectrum resource is an unlicensed spectrum resource. Before using the channel of the unlicensed spectrum to transmit data, you need to perform the state of listening to the channel after listening to the channel. When the channel is idle, data can be transmitted on the channel. When the channel is busy, it cannot be transmitted on the channel. data. In this embodiment, the network device may listen to one or more channels specified in advance, or randomly listen to one or more channels, or listen to the channel according to a preset rule, and specifically listen. The method is not limited.

The method for the network device to listen to the state of the channel of the unlicensed spectrum may be a power measurement method, where the network device measures the received power on the channel of the unlicensed spectrum within a preset duration, and the measured received power is less than the preset. In the case of the power threshold, it indicates that the channel is in an idle state; if the measured received power is not less than a preset power threshold, it indicates that the channel is in a busy state.

In different implementation manners, the network device performing channel sounding includes: the network device listening to each sub-band in the system frequency band, and when detecting that one or more sub-bands are in an idle state, the network device is in the first time domain position. And transmitting, to the terminal device, indication information of the one or more sub-bands in an idle state.

The system band is a spectrum resource allocated to a specified frequency range of the communication system of the embodiment, the system band includes a plurality of sub-bands, each sub-band includes a plurality of sub-carriers, the number of sub-bands in the system band, and sub-carriers in the sub-band The number can be set according to actual needs, and is not limited in this embodiment. The network device pre-stores a preset time domain location of the synchronization signal, and the preset time domain location includes at least one of a preset transmission start time, a preset transmission termination time, and a duration. The first time domain position is an actual start transmission time of the synchronization signal, the first time domain position and the preset initial transmission time of the synchronization signal coincide or after the preset start transmission time of the synchronization signal, and the first time domain position Aligned with the time unit boundary of the communication system. The time unit is a time domain resource in which the communication system uses the smallest granularity in the data transmission process, and the boundary in the time unit boundary may be a start boundary or a termination boundary. For example, the time unit is any one of a symbol, a time slot, a subframe, and a transmission time interval.

Before the preset start transmission time of the synchronization signal, the network device separately listens to each sub-band in the system frequency band, and when detecting one or more sub-bands being in an idle state, the first time domain location is to the terminal device. And transmitting, by the terminal device, the indication information of the one or more subbands in the idle state, and the terminal device receives the frequency domain resource used by the transmission synchronization signal according to the indication information.

For example, as shown in FIG. 2b, the system frequency band includes four subbands, and the four subbands are subband 0, subband 1, subband 2, and subband 3, respectively, and each subband corresponds to a different frequency range. The network device performs a listening and speaking process on the subband 0 to the subband 3 respectively before the preset transmission start time of the synchronization signal, and assumes that the network device detects the subband 0, the subband 2, and the sub in the second time domain position. Band 3 is in an idle state, subband 0, subband 2, and subband 3 are available subbands, such that the network device can transmit a synchronization signal on at least one of subband 0, subband 2, and subband 3. In a case where the second time domain position is aligned with the time unit boundary, the second time domain position and the first time domain position coincide; in the case where the second time domain position is not aligned with the time unit boundary, the second time domain position is Before the first time domain location, the first time domain location is the time unit boundary that is closest to the second time domain location distance. The network device sends the indication information of the subband 0, the subband 2, and the subband 3 to the terminal device in the first time domain location, and the terminal device learns the information of the available subband and the actual frequency domain location of the synchronization signal according to the indication information.

It should be noted that, in the present application, a subband refers to one or more carriers, or a partial subcarrier or a partial resource block on one carrier. The concept of subbands may no longer exist in future communication technologies, but the same applies to concepts such as partial subcarriers or partial resource blocks represented by subbands.

In different embodiments, the indication information includes: a subcarrier index of the synchronization signal, a subband index of the synchronization signal, an index of one or more subbands of the idle state, a bandwidth of one or more subbands of the idle state, and an idle state. The number of one or more subbands, the bandwidth of the system band, the number of other subbands of one or more subbands in the system band except the idle state, and the bandwidth of other subbands of one or more subbands in the system band except the idle state. At least one of them.

The subcarrier index of the synchronization signal indicates an index of the subcarrier occupied by the synchronization signal, and the subband index of the synchronization signal indicates an index of the subband occupied by the synchronization signal. It should be noted that the synchronization signal needs to be sent on a preset single sub-band. If the network device listens to the preset single sub-band as a busy state, the network device is adjacent to the preset single sub-band. The sync signal is sent on the idle single sub-band. Optionally, the synchronization signal is in a mirror relationship between the subcarrier position on the preset subband and the subcarrier position on the actual idle subband.

For example, according to the example of FIG. 2b and FIG. 2c, each sub-band includes 34 sub-carriers, the sub-carrier index in each sub-band is 0 to 33, and the bandwidth of each sub-carrier is 15 kHz. The upper diagram of FIG. 2c shows a schematic diagram of the preset frequency domain position distribution of the synchronization signal. It can be seen from the figure that the preset frequency domain position of the synchronization signal is: subcarriers 4 to 6 in subband 1, and subband 3 Subcarriers 27 to 29. The listening result of the network device is that subband 0, subband 2, and subband 3 are in an idle state, and subband 1 is in a busy state, and the synchronization signal cannot be transmitted on the subband 1, and the network device can select adjacent to the subband 1. The synchronization signal is transmitted on the subband 0 where the synchronization signal is not deployed. The subcarrier actually occupied by the synchronization signal on the subband 0 is in a mirror relationship with the subcarrier preset on the subband 1.

The lower diagram of Fig. 2c shows a schematic diagram of the actual frequency domain position distribution of the synchronization signal. It can be seen from the figure that the actual frequency domain position of the synchronization signal is: subcarriers 27 to 29 of subband 0, and subcarriers 27 of subband 2. To 29.

According to the example of Figures 2b and 2c, the indication information comprises at least one of the following parameters:

Subcarrier index of the synchronization signal: 27-29;

Subband index of the sync signal: 0 and 2;

Index of one or more subbands of the idle state: 0, 2, and 3;

Bandwidth of one or more subbands in idle state: 3*34*15 kHz;

The number of one or more sub-bands in the idle state: 3;

Bandwidth of the system band: 4*34*15kHz;

Number of other sub-bands of one or more sub-bands in the system band except idle state: 1;

Bandwidth of other subbands of one or more subbands in the system band except idle state: 1*34*15 kHz.

In different implementation manners, the network device listens to the system frequency band, and when the system frequency band is in an idle state, the network device sends a synchronization signal on the entire system frequency band, and notifies the system frequency band indication information in the first time domain location. In the case that the system frequency band is busy, the network device separately listens to each sub-band of the system frequency band, and when detecting that one or more sub-bands are in an idle state, sends the information to the terminal device in the first time domain position. Indication information for one or more subbands in the idle state. In this embodiment, the process of the network device listening to each sub-band can refer to the embodiment in FIG. 2b and FIG. 2c, and details are not described herein again.

It should be noted that, when the network device uses multiple sub-bands to send synchronization signals, the network device may allocate the transmission power to multiple sub-bands evenly, or may send the transmission power according to preset weights. The power is allocated to multiple sub-bands, for example, a large transmission power is allocated on a sub-band with good channel quality, and a small transmission power is allocated on a sub-band with poor channel quality to increase the reliability of synchronization signal transmission.

In different implementation manners, the network device is configured to listen to the channel, including: the network device uses the frequency hopping method to listen to the channel, and the channels that are monitored twice are different, that is, the channel that is monitored by the ith time and the first The channels for i+1 times of listening are not the same, and i is an integer greater than 0, wherein the period of frequency hopping can be set as needed.

For example: As shown in FIG. 2d, the network device listens for subband 0 for the first time, and if subband 0 is idle, transmits a synchronization signal on subband 0. If subband 0 is busy, the network device continues to listen on subband 1 until it hears the subband of the idle state. As can be seen from Fig. 2d, the subbands of the two adjacent snoops are different, and the frequency hopping period is 4 subbands. By transmitting a synchronization signal on different sub-bands by frequency hopping, the effect of frequency diversity can be achieved, and the reliability of synchronization signal transmission is improved.

It should be noted that the number of subbands that the network device listens for each time is not limited to one of FIG. 2e, and multiple consecutive or non-contiguous subbands may be intercepted as needed.

In different implementation manners, the network device also performs frequency channel hopping in the manner of frequency hopping. The frequency hopping mode is: the network device has the same channel in the i-th listening and the i+1th listening, i+2 The channel is the same as the i+3th listening channel, but the channel from the i-th to the i+1th is different from the channel in the i+2 to i+3 times, and i is an integer greater than 0. Among them, the frequency hopping period can be set as needed.

For example: Referring to FIG. 2e, the network device listens on subband 0 for the first time and the second time, and listens on subband 1 for the third and fourth time. The network device sends the indication information of the subband of the idle state to the terminal device every time the subband is intercepted, and continues to perform the next interception if the subband to be monitored is busy. Until the subband of the idle state is heard.

In different implementation manners, the network device uses a single sub-band and multiple sub-bands to perform channel sensing in an alternate manner; wherein, the channel that is monitored by the i-th is a single sub-band, and the channel that is transmitted by the i+1th is a multi-sub-band. The single sub-band of the i-th interception is different from the single sub-band of the i+th interception; or the channel of the i-th interception is a multi-subband, and the channel of the i+1th interception is a single sub-band, The i+1 band listening single subband is different from the i+3th listening single subband, and i is an integer greater than 0.

For example, as shown in Figure 2f, the network device uses a single sub-band and multiple sub-bands to perform channel interception. The network device listens for the first time on sub-band 0, and the second time in sub-band 0 to 3. Listening on the third, listening on the sub-band 1 for the third time, and so on. The network device sends the indication information of the subband of the idle state to the terminal device if the monitored single subband or the multiple subbands are in an idle state each time the network device is listening. The indication information further carries a flag bit indicating a single sub-band or a multi-sub-band, and the terminal device learns, according to the flag, whether the synchronization signal is transmitted by using a single sub-band or a multi-sub-band.

It should be noted that the index of the multiple sub-bands that the network device listens to each time is not limited to the same in FIG. 2f, and the indexes of the multiple sub-bands that the network device listens to may also be different.

S202. The listening result of the channel is idle.

S203. The network device sends the synchronization signal and/or the synchronization signal time information to the terminal device in the first time domain location, and the terminal device receives the synchronization signal and/or the synchronization signal time information that is sent by the network device in the first time domain location.

The network device stores a preset time domain location of the synchronization signal to be sent, where the preset time domain location includes at least one of a preset transmission start time, a preset transmission termination time, and a duration of the synchronization signal. The network device performs a listening and speaking process before the preset sending start time of the synchronization signal, and the network device detects that the channel is in an idle state in the second time domain position, and in the case that the second time domain location is a time unit boundary, The second time domain location and the first time domain location coincide; in the case where the second time domain location is not the time unit boundary, the first time domain location is after the second time domain location and is closest to the second time domain location Unit boundary.

The time unit is the minimum time granularity used in the data transmission process of the communication system, and the time unit may be any one of a symbol, a time slot and a TTI, and the time unit boundary may be a start boundary or a termination boundary. The synchronization signal time information is used to indicate that the terminal device knows the actual time domain location of the synchronization signal.

S204. The terminal device determines an actual time domain location of the synchronization signal according to the synchronization signal time information.

The synchronization signal time information indicates the actual time domain position of the synchronization signal, or the offset between the preset transmission start time of the synchronization signal and the actual transmission start time, and the terminal device determines the synchronization signal at the time according to the synchronization signal time information. The sending location on the domain.

S205. The terminal device receives the synchronization signal at the actual time domain location.

The terminal device starts receiving the synchronization signal sent by the network device in the first time domain location.

In various embodiments, the synchronization signal time information is sent prior to the synchronization signal. For example, in a case where the second time domain location and the first time domain location do not coincide, the second time domain location is before the first time domain location, and the network device may be between the second time domain location and the second time domain location A synchronization signal is transmitted to the terminal device to reduce the occupation of the transmission resource of the synchronization signal.

It should be noted that, when the network device detects that one or more channels are in an idle state in the second time domain location, the second time domain location is not aligned with the boundary of the time unit, then the network device continues in the second time domain. A subband that listens to an idle state in the system band between the location and the first time domain location, and the network device listens to the subband of all idle states before the first time domain location as a subband available to the communication system.

In different embodiments, the synchronization signal includes n synchronization signal blocks, and the start boundary of the first synchronization signal block in the n synchronization signal blocks is aligned with the first time domain position, and each synchronization signal block in the n synchronization signal blocks The relative position remains the same, and n is an integer greater than zero.

The synchronization signal block represents a time-frequency resource, and the network device uses the n synchronization signal blocks to send the synchronization signal, and the n synchronization signal blocks may be continuously distributed or non-continuously distributed. Since the network device detects that the channel is in an idle state after the preset initial sending time of the synchronization signal, the network device cannot send the synchronization signal in the preset time domain location, and the network device starts to send the synchronization signal from the first time domain location, and sends the synchronization signal. During the synchronization signal, the relative positions of the n sync signal blocks in the sync signal remain unchanged, that is, the sort order remains 1 to n.

For example, refer to FIG. 3a, which is a schematic diagram of a method for transmitting a synchronization signal according to an embodiment of the present invention. In the embodiment of the present invention, a time unit used by the communication system is a minislot, and a radio frame includes 10 subframes (subframe). ), 10 subframe numbers are 0 to 9, respectively. Each subframe includes 7 minislots in the time domain, numbered 1 to 7, respectively, that is, each subframe includes a minislot 1 to a minislot 7 in the time domain. Assuming that the preset time domain position of the synchronization signal is in the minislot 3 and the minislot 4 of the subframe 0, the synchronization signal includes two synchronization signal blocks, numbered 1 and 2 respectively, and the time t1 is the preset start of the synchronization signal. Send time.

The network device starts to perform the listening and speaking process before the time t1, and assumes that the network device detects that the channel is in an idle state at time t2, and the time t2 is located between the start boundary and the termination boundary of the minislot 2 of the subframe 1, t2 The time is not aligned with the boundary of the minislot, and the network device takes the start boundary of the minislot 3 of the subframe 1 after the time t2 and closest to the time t2 as the first time domain position, and the first time domain position is the position of FIG. 3a. At time t3, the network device sends the synchronization signal and/or the synchronization signal time information to the terminal device at time t3. The actual time domain position of the synchronization signal is in the minislot 3 and the minislot 4 of the subframe 1, and the synchronization signal block in the synchronization signal. The order of transmission remains the same.

For another example, the preset time position of the synchronization signal is the preset start transmission time of the synchronization signal at the time of the micro-slot 2 and the micro-slot 3, t4 of the subframe 5, that is, the start boundary of the micro-slot 3, the network device Listening to the channel before time t4, assuming that the network device monitors that the channel is in an idle state at time t5, and at time t5 is aligned with the start boundary of the minislot 6 of the subframe 5, then the time at t5 is the first time domain position. The network device starts to send the synchronization signal at time t5, and the transmission order of the two synchronization signal blocks in the synchronization signal remains unchanged, that is, the network device starts transmitting the synchronization signal block 1 at the time t5 and then transmits the synchronization signal block 2.

It should be noted that the offset between the first time domain location and the preset initial transmission time needs to be less than a preset value. If the offset is not less than the preset value, the network device will not send the synchronization signal, and the network device The channel is continuously listened according to the preset listening rules.

In different embodiments, the synchronization signal time information includes at least one of a subframe index, a symbol index, a slot index, and a TTI index corresponding to the first time domain location; or

The synchronization signal time information may be an actual time domain position of the synchronization signal. For example, as shown in FIG. 3a, the actual time domain position of the synchronization signal is the minislot 3 and the minislot 4 of the subframe 1, and the subframe 5 Micro-slot 6 and micro-slot 7.

The network device may also be an offset between the preset time domain position of the synchronization signal and the actual time domain location. For example, as shown in FIG. 3a, the preset time domain position of the previous synchronization signal is: micro of subframe 0. For slot 3 and minislot 4, the actual time domain location is the minislot 3 and the minislot 4 of subframe 1, and the offset between the preset time domain location and the actual time domain location can be expressed as: The frame offset is 1, and the minislot offset is 7. The preset time domain position of the following synchronization signal is: microslot 3 and minislot 4 of subframe 5, and the actual time domain location is: microslot 6 and microslot 7 of subframe 5, then preset The offset between the domain location and the actual time domain location can be expressed as: subframe offset 0, minislot offset 3.

In different embodiments, the synchronization signal includes n synchronization signal blocks, the first time domain position is aligned with the start boundary of the i-th synchronization signal block of the n synchronization signal blocks, and the first synchronization of the n synchronization signal blocks The relative position of the signal block to the i-1th sync signal block remains unchanged, the relative positions of the i-th to n-th sync signal blocks remain unchanged, and the first to the i-th sync signal blocks are in the nth sync. After the signal block or after the lower one sync signal block is aligned with the end boundary of the nth sync signal block, n is an integer greater than 1, i is an integer greater than 1, and n sync signal blocks may be continuously distributed or non- Continuous distribution.

For example, referring to FIG. 3b, n=2, the synchronization signal includes two synchronization signal blocks, which are a synchronization signal block 1 and a synchronization signal block 2, respectively, and the synchronization signal block 1 and the synchronization signal block 2 are continuously distributed. The preset time domain position of the synchronization signal is in the minislot 3 and the minislot 4 of the subframe 5, and the network device listens to the channel before the start boundary of the minislot 3 of the subframe 5, assuming that the network device listens at time t1. The channel is in an idle state, the time t1 is aligned with the start boundary of the minislot 4 of the subframe 5, and the time t1 is the first time domain position, and the network device starts transmitting the synchronization signal at time t1, wherein the time of the synchronization signal block 2 is started. The domain position remains unchanged, sync signal block 1 is after sync signal block 2 and the start boundary of sync signal block 1 is aligned with the end boundary of sync signal block 2. In addition, the network device also starts transmitting synchronization signal time information to the terminal device at time t1.

Referring to Fig. 3c, the difference between Fig. 3c and Fig. 3b is only that after the sync signal block 1 is after the sync signal block 2, the start boundary of the sync signal block 1 is not aligned with the end boundary of the sync signal block 2. In other embodiments, the n sync signal blocks included in the sync signal may be in the same subframe.

In different embodiments, the synchronization signal time information includes a subframe index, a symbol index, a slot index, and a TTI index in which the actual time domain positions of the 1st to ith-1th synchronization signal blocks in the n synchronization signal blocks are located. At least one; or

At least one of a subframe offset, a symbol offset, a slot offset, and a TTI offset between an actual time domain position of the first to the i-1th sync signal blocks and a preset time domain position .

Wherein, since the first time domain position is aligned with the start boundary of the i-th sync signal block in the n sync signal blocks, when the network device transmits the synchronization signal in the first time domain position, the i-th to n-th sync signal blocks The time domain transmission position and the preset time domain location are consistent, and only the time domain transmission positions of the first to the i-1th synchronization signal blocks are changed, and the network device only needs to block the first to the i-1th synchronization signal blocks. The actual time domain location is notified to the terminal device, or the offset between the time domain time domain position of the first to the i-1th synchronization signal blocks and the preset time domain location is notified to the terminal device.

For example, as shown in FIG. 3b, the synchronization signal includes two synchronization signal blocks: a synchronization signal block 1 and a synchronization signal block 2. The time domain position of the synchronization signal block 2 remains unchanged, and is still located in the microslot 4 of the subframe 5. . The preset time domain position of the sync signal block 1 is the minislot 3 of the subframe 5, the actual time domain position of the sync signal block 1 is the minislot 5 of the subframe 5, and the preset time domain position of the sync signal block 1 and The offset between the actual time domain locations can be expressed as: subframe offset 0, minislot offset 2.

For another example, as shown in FIG. 3c, the synchronization signal includes two synchronization signal blocks: a synchronization signal block 1 and a synchronization signal block 2. The time domain position of the synchronization signal block 2 remains unchanged, and is still located in the microslot 4 of the subframe 5. . The preset time domain position of the sync signal block 1 is the minislot 3 of the subframe 5, the actual time domain position of the sync signal block 1 is the minislot 6 of the subframe 5, and the preset time domain position of the sync signal block 1 and The offset between the actual time domain locations can be expressed as: subframe offset 0, minislot offset 3.

In a different implementation manner, the network device may reserve a preset frequency domain resource for the synchronization signal after the preset start transmission time of the synchronization signal, where the reserved frequency domain resource is specifically used to transmit the synchronization signal, thereby avoiding Listen to the resource conflict caused by the time domain offset and improve the reliability of the synchronization signal transmission.

In different implementation manners, the network device may directly send a synchronization signal to the terminal device when the duration of the network device listening to the busy state exceeds the preset duration, and the actual transmission start time of the synchronization signal is a time unit boundary. In addition, the terminal device may send at least one of an actual time domain position, an actual frequency domain position, a time domain offset, and a frequency domain offset of the synchronization signal to the terminal device while transmitting the synchronization signal. The time domain offset represents the offset between the actual time domain position of the synchronization signal and the preset time domain position, and the frequency domain offset represents the offset between the actual frequency domain position of the synchronization signal and the preset frequency domain position. the amount.

It should be noted that the transmitting apparatus 4 shown in FIG. 4 can implement the network device side of the embodiment shown in FIG. 2a, wherein the listening unit 401 is configured to perform channel sensing; for example, the listening unit performs S201 in FIG. 2a. step. The sending unit 402 is configured to: when the listening result of the channel is idle, the network device sends a synchronization signal and/or synchronization signal time information to the terminal device in the first time domain location; wherein the first The time domain location coincides with a preset transmission start time of the synchronization signal or the first time domain location coincides with a preset transmission start time of the synchronization signal, and the first time domain location is aligned with a time unit boundary For example, the transmitting unit 402 is configured to perform the steps of S202 and S203. The transmitting device 4 may be a network device, and the transmitting device 4 may also be a field-programmable gate array (FPGA), a dedicated integrated chip, and a system on chip (SoC) for implementing related functions. , central processor unit (CPU), network processor (network processor, NP), digital signal processing circuit, microcontroller (micro controller unit (MCU), can also use programmable logic device (programmable logic device, PLD) or other integrated chips.

The embodiment of the present invention and the method embodiment of FIG. 2a are based on the same concept, and the technical effects are also the same. For the specific process, reference may be made to the description of the method embodiment of FIG. 2a, and details are not described herein again.

As shown in FIG. 5, an embodiment of the present invention further provides a transmitting apparatus 5.

In a possible design, the transmitting device 5 is a network device, and the network device includes:

The memory 502 is configured to store programs and data. The number of the memories may be one or more, and the type of the memory may be any form of storage medium. For example, the memory may be a random access memory (English: random access memory, RAM for short) or a read only memory (English: read only memory, abbreviated as: ROM) or a flash memory, wherein the memory 502 may be located separately in the terminal device, It may be located inside the processor 501.

The processor 501 is configured to execute the program code stored in the memory 502, when the program code is executed, the processor 501 is configured to: according to a period of the synchronization signal burst set in the serving cell, in the cell to be tested a period of the synchronization signal burst set and the time offset determining a location of the synchronization signal burst set in the to-be-tested cell; performing, according to a location of the synchronization signal burst set in the to-be-tested cell, the to-be-tested cell measuring. For example, the processor 1201 is configured to perform the steps of S201 in FIG. 2a.

The transceiver 503 is configured to send and receive signals. The transceiver can be a separate chip, or can be a transceiver circuit in the processor 501 or as an input and output interface. The transceiver may be at least one of a transmitter for performing a transmitting step in the device and a receiver for performing a receiving step in the device. Optionally, the transceiver 503 may further include a transmitting antenna and a receiving antenna. The transmitting antenna and the receiving antenna may be two antennas that are separately provided, or may be one antenna. The transceiver 503 is configured to send a synchronization signal and/or synchronization signal time information to the terminal device in a first time domain location if the listening result of the channel is idle; wherein the first time domain location is After the preset transmission start time of the synchronization signal or the first time domain position coincides with a preset transmission start time of the synchronization signal, the first time domain position is aligned with a time unit boundary. For example, the transceiver 503 is configured to perform the steps of S202 and S203 in Figure 2a.

The transceiver 503, the memory 502, and the processor 501 communicate with each other through an internal connection path, for example, by a bus connection.

In different embodiments, the synchronization signal includes n synchronization signal blocks, and a start boundary of the first synchronization signal block of the n synchronization signal blocks is aligned with the first time domain position, the n The relative position of each sync signal block in the sync signal block remains unchanged, and n is an integer greater than zero.

In different embodiments, the synchronization signal time information includes:

At least one of a subframe index, a symbol index, a slot index, and a transmission time interval index corresponding to the first time domain location; or

At least one of a subframe offset, a symbol offset, a slot offset, and a TTI offset between the first time domain location and a preset start transmission time of the synchronization signal.

In a different implementation, the synchronization signal includes n synchronization signal blocks, and the first time domain position is aligned with a starting boundary of an i-th synchronization signal block of the n synchronization signal blocks, the n The relative positions of the first sync signal block to the i-1th sync signal block in the sync signal block remain unchanged, and the relative positions of the i-th sync signal block to the n-th sync signal block in the n sync signal blocks Keeping unchanged, the first sync signal block to the i-1th sync signal block of the n sync signal blocks are after the nth sync signal block or the first one of the n sync signal blocks The start boundary of the sync signal block is aligned with the end boundary of the nth sync signal block, n≥2 and is an integer, 2≤i≤n and i is an integer.

Optionally, the synchronization signal time information includes:

At least one of a subframe index, a symbol index, a slot index, and a transmission time interval index of an actual time domain position of the first synchronization signal block to the i-1th synchronization signal block among the n synchronization signal blocks ;or

Subframe offset, symbol offset, time slot between the actual time domain position of the first sync signal block to the i-1th sync signal block and the preset time domain position among the n sync signal blocks At least one of an offset and a transmission time interval offset.

In a different implementation manner, a distance between the first time domain location and a preset transmission start time of the synchronization signal is less than a preset distance.

In different implementations, the processor 501 is configured to perform channel sensing, specifically:

Listening to each subband in the system band;

When the one or more sub-bands are detected as being in an idle state, the transceiver 503 is instructed to transmit the indication information of the one or more sub-bands of the idle state to the terminal device in the first time domain location.

In various embodiments, the indication information includes: a subcarrier index of the synchronization signal, an index of the one or more subbands in an idle state, a bandwidth of the one or more subbands in an idle state, an idle state. The number of the one or more sub-bands, the bandwidth of the system band, the index of other sub-bands of the one or more sub-bands in the system band except the idle state, and the idle state of the system band At least one of the number of other sub-bands of the one or more sub-bands and a bandwidth of other sub-bands of the one or more sub-bands other than the idle state in the system band.

In one possible design, the transmitting device 5 may be a chip, for example, may be a communication chip used in a network device for implementing related functions of the processor 501 in the network device. The chip can be a field programmable gate array for implementing related functions, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, and a programmable controller or other integrated chip. In the chip, optionally, one or more memories may be included for storing program code, and when the program code is executed, the processor implements corresponding functions.

These chips may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (sometimes referred to as code or programs). When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.

It should be noted that the receiving device 6 shown in FIG. 6 can implement the terminal device side of the embodiment shown in FIG. 2a, wherein the receiving unit 601 is configured to receive synchronization signal time information sent by the network device, and the determining unit 602 is configured to: Determining an actual time domain position of the synchronization signal according to the synchronization signal time information; the receiving unit 601 is further configured to receive the synchronization signal sent by the network device in the actual time domain location. For example, the receiving unit 601 performs the ratio of S203 and S205 in Fig. 2a; the determining unit 602 performs the step of S204 in Fig. 2a. The receiving device 6 may be a terminal device, and the receiving device 6 may also be a field-programmable gate array (FPGA), a dedicated integrated chip, and a system on chip (SoC) for implementing related functions. , central processor unit (CPU), network processor (NP), digital signal processing circuit, microcontroller (micro controller unit (MCU), can also use programmable logic device (programmable logic device, PLD) or other integrated chips.

As shown in FIG. 7, an embodiment of the present invention further provides a receiving device 7.

In a possible design, the receiving device 7 is a terminal device, and the terminal device includes:

The memory 702 is configured to store programs and data. The number of the memories may be one or more, and the type of the memory may be any form of storage medium. For example, the memory may be a random access memory (English: random access memory, RAM for short) or a read only memory (English: read only memory, abbreviated as: ROM) or a flash memory, wherein the memory 702 may be located separately in the terminal device, It may be located inside the processor 701.

The processor 701 is configured to execute the program code stored in the memory 502. When the program code is executed, the processor 501 is configured to determine an actual time domain position of the synchronization signal according to the synchronization signal time information. For example, the processor 1201 is configured to perform the steps of S204 in FIG. 2a.

The transceiver 703 is configured to send and receive signals. The transceiver can be a separate chip, or can be a transceiver circuit in the processor 701 or as an input and output interface. The transceiver may be at least one of a transmitter for performing a transmitting step in the device and a receiver for performing a receiving step in the device.

Optionally, the transceiver 703 may further include a transmitting antenna and a receiving antenna, and the transmitting antenna and the receiving antenna may be two antennas that are separately provided, or may be one antenna. The transceiver 703 is configured to receive synchronization signal time information sent by the network device, and receive the synchronization signal sent by the network device at the actual time domain location determined by the processor 701. For example, the transceiver 703 is configured to perform the steps of S204 in Figure 2a.

The transceiver 703, the memory 702, and the processor 701 communicate with each other through an internal connection path, for example, via a bus.

In different implementations, the transceiver 703 is further configured to receive indication information sent by the network device, where the indication information indicates a frequency domain location of one or more subbands in an idle state in a system frequency band.

In one possible design, the receiving device 7 may be a chip, for example, may be a communication chip used in a network device for implementing related functions of the processor 701 in the network device. The chip can be a field programmable gate array for implementing related functions, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, and a programmable controller or other integrated chip. In the chip, optionally, one or more memories may be included for storing program code, and when the program code is executed, the processor implements corresponding functions.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted by a computer readable storage medium. The computer instructions can be from a website site, computer, server or data center to another website site by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Transfer from a computer, server, or data center. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, the program can be stored in a computer readable storage medium, when the program is executed The flow of the method embodiments as described above may be included. The foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

Claims

A method for transmitting a synchronization signal, comprising:

Network equipment performs channel sounding;

In a case that the listening result of the channel is idle, the network device sends a synchronization signal and/or synchronization signal time information to the terminal device in the first time domain location; wherein the first time domain location is in the After the preset transmission start time of the synchronization signal or the first time domain position coincides with the preset transmission start time of the synchronization signal, the first time domain position is aligned with the time unit boundary.
The method according to claim 1, wherein said synchronization signal comprises n synchronization signal blocks, a starting boundary of said first synchronization signal block and said first time domain position of said n synchronization signal blocks Alignment, the relative positions of the respective sync signal blocks in the n sync signal blocks remain unchanged, and n is an integer greater than zero.
The method of claim 2 wherein said synchronization signal time information comprises:

At least one of a subframe index, a symbol index, a slot index, and a transmission time interval index corresponding to the first time domain location; or

At least one of a subframe offset, a symbol offset, a slot offset, and a TTI offset between the first time domain location and a preset start transmission time of the synchronization signal.
The method according to claim 1, wherein said synchronization signal comprises n sync signal blocks, said first time domain position and a starting boundary of an i-th sync signal block of said n sync signal blocks Aligning, the relative positions of the first sync signal block to the i-1th sync signal block of the n sync signal blocks remain unchanged, and the i-th sync signal block to the nth of the n sync signal blocks The relative position of the sync signal block remains unchanged, and the first sync signal block to the i-1th sync signal block of the n sync signal blocks are after the nth sync signal block or the n sync signals The start boundary of the first sync signal block in the block is aligned with the end boundary of the nth sync signal block, n ≥ 2 and is an integer, 2 ≤ i ≤ n and i is an integer.
The method of claim 4 wherein said synchronization signal time information comprises:

At least one of a subframe index, a symbol index, a slot index, and a TTI index of an actual time domain position of the first synchronization signal block to the i-1th synchronization signal block in the n synchronization signal blocks; or

Subframe offset, symbol offset, time slot between the actual time domain position of the first sync signal block to the i-1th sync signal block and the preset time domain position among the n sync signal blocks At least one of an offset and a transmission time interval offset.
The method according to any one of claims 1 to 5, wherein a distance between the first time domain position and a preset transmission start time of the synchronization signal is less than a preset distance.
The method of any of claims 1-6, wherein the network device performs channel sounding comprises:

The network device listens to each subband in the system frequency band;

When detecting that one or more sub-bands are in an idle state, the network device transmits indication information of the one or more sub-bands of the idle state to the terminal device in the first time domain location.
The method according to claim 7, wherein said indication information comprises: a subcarrier index of said synchronization signal, an index of said one or more subbands of an idle state, said one or more substates of an idle state Bandwidth, number of said one or more subbands in an idle state, bandwidth of said system band, index of other subbands of said one or more subbands in said system band except idle state, said system At least one of the number of other sub-bands of the one or more sub-bands other than the idle state in the frequency band and the bandwidth of the other sub-bands of the one or more sub-bands of the system frequency band other than the idle state.
A method for receiving a synchronization signal, comprising:

Receiving, by the terminal device, synchronization signal time information sent by the network device;

Determining, by the terminal device, a time domain location of the synchronization signal transmission according to the synchronization signal time information;

Receiving, by the terminal device, the synchronization signal sent by the network device at the time point.
The method according to claim 9, wherein the terminal device receives the synchronization signal time information sent by the network device, and further includes:

The terminal device receives indication information sent by the network device, where the indication information indicates a frequency domain location of one or more subbands in an idle state in a system frequency band.
A transmitting device for synchronizing signals, comprising: a processor and a transceiver;

The processor is configured to perform channel sensing;

The transceiver is configured to send synchronization signal and/or synchronization signal time information to the terminal device in a first time domain location if the listening result of the channel is idle; wherein the first time domain location After the preset transmission start time of the synchronization signal or the first time domain position coincides with a preset transmission start time of the synchronization signal, the first time domain position is aligned with a time unit boundary.
The apparatus according to claim 11, wherein said synchronization signal comprises n synchronization signal blocks, a starting boundary of said first synchronization signal block and said first time domain position of said n synchronization signal blocks Alignment, the relative positions of the respective sync signal blocks in the n sync signal blocks remain unchanged, and n is an integer greater than zero.
The apparatus according to claim 11, wherein said synchronization signal time information comprises:

At least one of a subframe index, a symbol index, a slot index, and a transmission time interval index corresponding to the first time domain location; or

At least one of a subframe offset, a symbol offset, a slot offset, and a TTI offset between the first time domain location and a preset start transmission time of the synchronization signal.
The apparatus according to claim 11, wherein said synchronization signal comprises n sync signal blocks, said first time domain position and a starting boundary of an i-th sync signal block of said n sync signal blocks Aligning, the relative positions of the first sync signal block to the i-1th sync signal block of the n sync signal blocks remain unchanged, and the i-th sync signal block to the nth of the n sync signal blocks The relative position of the sync signal block remains unchanged, and the first sync signal block to the i-1th sync signal block of the n sync signal blocks are after the nth sync signal block or the n sync signals The start boundary of the first sync signal block in the block is aligned with the end boundary of the nth sync signal block, n ≥ 2 and is an integer, 2 ≤ i ≤ n and i is an integer.
The apparatus according to claim 14, wherein said synchronization signal time information comprises:

At least one of a subframe index, a symbol index, a slot index, and a TTI index of an actual time domain position of the first synchronization signal block to the i-1th synchronization signal block in the n synchronization signal blocks; or

Subframe offset, symbol offset, time slot between the actual time domain position of the first sync signal block to the i-1th sync signal block and the preset time domain position among the n sync signal blocks At least one of an offset and a transmission time interval offset.
The apparatus according to any one of claims 11-15, wherein a distance between the first time domain position and a preset transmission start time of the synchronization signal is less than a preset distance.
The device according to any one of claims 11-15, wherein the processor is configured to perform channel sensing, specifically:

Listening to each subband in the system band;

When the one or more sub-bands are detected as being in an idle state, the transceiver is instructed to send the indication information of the one or more sub-bands of the idle state to the terminal device in the first time domain location.
The apparatus according to claim 17, wherein said indication information comprises: a subcarrier index of said synchronization signal, an index of said one or more subbands of an idle state, said one or more substates of an idle state Bandwidth, number of said one or more subbands in an idle state, bandwidth of said system band, index of other subbands of said one or more subbands in said system band except idle state, said system At least one of the number of other sub-bands of the one or more sub-bands other than the idle state in the frequency band and the bandwidth of the other sub-bands of the one or more sub-bands of the system frequency band other than the idle state.
A receiving device for synchronizing signals, comprising: a transceiver and a processor;

The transceiver is configured to receive synchronization signal time information sent by the network device;

The processor is configured to determine an actual time domain location of the synchronization signal according to the synchronization signal time information;

The transceiver is further configured to receive the synchronization signal sent by the network device at the actual time domain location.
The device of claim 19, wherein

The transceiver is further configured to receive indication information sent by the network device, where the indication information indicates a frequency domain location of one or more subbands in an idle state in a system frequency band.
A computer storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1-8.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-8.
A network device, comprising: a memory and one or more processors coupled to the one or more processors, the one or more processors for performing the claims 1-8 The method of any of the preceding claims.
A network device, characterized in that the network device comprises one or more processors, the one or more processors being coupled to a memory, reading instructions in the memory and performing as claimed in accordance with the instructions 1-8 The method of any of the preceding claims.
A computer storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 9-10.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 9-10.
A terminal device, comprising: a memory and one or more processors, the memory being coupled to the one or more processors, the one or more processors for performing the claim 9-10 The method of any of the preceding claims.
A terminal device, characterized in that the terminal device comprises one or more processors, the one or more processors being coupled to a memory, reading instructions in the memory and performing the claims according to the instructions 9-10 The method of any of the preceding claims.