WO2019095916A1 - 一种非授权频段上同步信号的发送方法、网络设备及终端设备 - Google Patents

一种非授权频段上同步信号的发送方法、网络设备及终端设备 Download PDF

Info

Publication number
WO2019095916A1
WO2019095916A1 PCT/CN2018/110602 CN2018110602W WO2019095916A1 WO 2019095916 A1 WO2019095916 A1 WO 2019095916A1 CN 2018110602 W CN2018110602 W CN 2018110602W WO 2019095916 A1 WO2019095916 A1 WO 2019095916A1
Authority
WO
WIPO (PCT)
Prior art keywords
synchronization signal
network device
channel
time
lbt
Prior art date
Application number
PCT/CN2018/110602
Other languages
English (en)
French (fr)
Inventor
庞继勇
朱俊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18879530.6A priority Critical patent/EP3703460A4/en
Publication of WO2019095916A1 publication Critical patent/WO2019095916A1/zh
Priority to US16/875,132 priority patent/US11570731B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and a device for mapping synchronization signals in an unlicensed frequency band scenario.
  • LAA Licensed Assisted Access
  • eLAA Enhanced Licensed Spectrum Assisted Access
  • LBT Listen before talk
  • a synchronization signal that supports user cell search is transmitted in a plurality of block combinations.
  • how to transmit the synchronization signal has become an urgent problem to be solved.
  • the embodiment of the present application provides a method for transmitting a synchronization signal applied to an unlicensed frequency band, a network device, and a terminal device, and proposes a mechanism for transmitting a synchronization signal in an unlicensed frequency band scenario, thereby solving the above problem.
  • the embodiment of the present application provides the following technical solutions:
  • the present application provides a method for transmitting a synchronization signal applied to an unlicensed frequency band.
  • the network device performs an LBT before listening to the start time of the synchronization signal to determine that the channel is Busy or idle; when the channel is busy, the network device cannot perform synchronization signal transmission at the beginning of the desired transmission synchronization signal, so the network device performs LBT again within a predetermined period of time after the start time, and again The LBT determines that the channel is idle when the synchronization signal is transmitted; when the channel is idle, the network device preempts the channel resource and transmits the synchronization signal at the start time of the desired transmission synchronization signal.
  • the network device can perform the LBT again within a certain time delay, so that the synchronization signal block that is not successfully transmitted when the channel is busy can be timely transmitted to ensure the access of the terminal device.
  • the synchronization signal includes L synchronization signal blocks, and the predetermined duration is at least one duration T L for transmitting the synchronization signal block, and L is an integer greater than or equal to 2.
  • the predetermined duration to the duration Ts for transmitting a synchronization signal for the block size i.e. the LBT network devices the N T S T0 after the starting moment of transmission of the synchronization signal, when When the channel is idle, the network device sends one synchronization signal block at time T0+N ⁇ T L , the N is an integer greater than or equal to 1, the l is less than or equal to the L, and the l is greater than or An integer equal to 1.
  • the predetermined duration is a granularity of orthogonal frequency division multiplexing OFDM symbols
  • the predetermined duration is a duration T OFDM occupied by at least one orthogonal frequency division multiplexing OFDM symbol
  • the network device performs LBT in M T OFDM after the start time, and when the channel is idle, the network device sends the synchronization signal at time T0+M ⁇ T OFDM , where the M is greater than or equal to 1 The integer.
  • the present application provides a method for receiving a synchronization signal on an unlicensed frequency band, including:
  • the terminal device searches for and receives a synchronization signal, where the synchronization signal includes consecutive L synchronization signal blocks, and the L is an integer greater than or equal to 2; the terminal device acquires the system corresponding to the network device according to the searched synchronization signal. information.
  • the present application provides a network device, including a processor and a transceiver connected to the processor through a bus, wherein the processor is configured to control the transceiver before a start time of transmitting a synchronization signal Listening to the LBT first to determine whether the channel is busy or idle; when the channel is busy, the transceiver performs LBT within a predetermined time period after the start time, and transmits the synchronization signal when the channel is idle; The transceiver transmits the synchronization signal at the start time when the channel is idle.
  • an embodiment of the present application provides a synchronization signal sending apparatus, where the synchronization signal sending apparatus has a function of implementing a network device in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present application provides a terminal device, including a transceiver, configured to search for and receive a synchronization signal, where the synchronization signal includes consecutive L synchronization signal blocks, and the L is an integer greater than or equal to 2. And a processor connected to the transceiver, configured to acquire system information corresponding to the network device according to the searched synchronization signal.
  • an embodiment of the present application provides a synchronization signal receiving apparatus, where the synchronization signal transmission apparatus has a function of implementing a network device in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present application provides a computer readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the second aspect above.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform the method of the first aspect or the second aspect.
  • FIG. 1 is a schematic diagram of a possible network architecture provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a synchronization signal block SSB according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a process interaction of a method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of transmission of a synchronization signal block according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a synchronization signal block transmission according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of transmission of a synchronization signal block according to another embodiment of the present application.
  • FIG. 7 is a schematic diagram of transmission of a synchronization signal block according to another embodiment of the present application.
  • FIG. 8 is a schematic diagram of transmission of a synchronization signal block according to another embodiment of the present application.
  • FIG. 9 is a schematic diagram of a synchronization signal block transmission according to another embodiment of the present application.
  • FIG. 10 is a schematic diagram of an LBT according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of an LBT according to another embodiment of the present application.
  • FIG. 12 is a schematic diagram of an LBT according to another embodiment of the present application.
  • FIG. 13 is a schematic diagram of an LBT according to another embodiment of the present application.
  • FIG. 14 is a schematic diagram of an LBT according to another embodiment of the present application.
  • FIG. 15 is a simplified schematic diagram of a network device according to an embodiment of the present application.
  • FIG. 16 is a simplified schematic diagram of a terminal device according to an embodiment of the present application.
  • the network architecture may be a network architecture of a wireless communication system, and the wireless communication system may operate in a licensed frequency band or in an unlicensed frequency band. It will be appreciated that the use of unlicensed bands can increase the system capacity of a wireless communication system.
  • the wireless communication system may include a network device and a terminal device, and the network device and the terminal device are connected by using a wireless communication technology.
  • the number and the configuration of the terminal device and the network device shown in FIG. 1 do not constitute a limitation on the embodiments of the present application.
  • one network device can be connected to one or more terminal devices.
  • the network device can also be connected to a core network device, which is not shown in FIG.
  • the wireless communication system mentioned in the embodiments of the present application includes, but is not limited to, a narrow band-internet of things (NB-IoT), and a global system for mobile communications (GSM).
  • GSM global system for mobile communications
  • EDGE Enhanced data rate for GSM evolution
  • WCDMA wideband code division multiple access
  • CDMA2000 code division multiple access
  • TD-SCDMA Time division-synchronization code division multiple access
  • LTE long term evolution
  • future mobile communication system includes, but is not limited to, a narrow band-internet of things (NB-IoT), and a global system for mobile communications (GSM).
  • EDGE Enhanced data rate for GSM evolution
  • WCDMA wideband code division multiple access
  • CDMA2000 code division multiple access
  • TD-SCDMA Time division-synchronization code division multiple access
  • LTE long term evolution
  • future mobile communication system future mobile communication system.
  • the foregoing network device is a device deployed in a radio access network to provide a wireless communication function for the terminal device.
  • the network device may include, but is not limited to, a base station (BS), a network controller, a transmission and reception point (TRP), a mobile switching center, or a wireless access point in wifi, etc., by way of example, wirelessly
  • the device through which the channel communicates directly with the terminal device is typically a base station.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points, or Radio Radio Units (RRUs).
  • RRUs Radio Radio Units
  • the wireless communication with the terminal device may also be another network device having a wireless communication function, which is not limited in this application.
  • the names of devices with base station functions may be different in different systems, for example, in an LTE network, called an evolved NodeB (eNB or eNodeB), in the third generation (the In the 3rd generation, 3G) network, it is called Node B (Node B), etc.
  • eNB evolved NodeB
  • Node B Node B
  • 5G base station 5G base station
  • a terminal device also called a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • a handheld device with wireless connectivity an in-vehicle device
  • a wearable device a computing device, or other processing device linked to a wireless modem.
  • terminal devices are: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, enhancements.
  • MIDs mobile internet devices
  • VR virtual reality
  • Augmented reality (AR) equipment wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid A wireless terminal in a wireless terminal, a wireless terminal in a transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or the like.
  • AR Augmented reality
  • the terms “network” and “system” may be used interchangeably, and the terms “user” and “terminal device” may be used interchangeably, but those skilled in the art can understand the meaning.
  • some of the English abbreviations in this document are described in the LTE system as an example of the present application, which may change with the evolution of the network, and the specific evolution may refer to the description in the corresponding standard.
  • the process of searching for a cell In the process of the user accessing the network, the process of searching for a cell, acquiring cell system information, and random access are required.
  • the main purpose of the cell search is to synchronize the frequency and symbol with the cell, obtain the system frame timing, and determine the physical identity of the cell.
  • the user After the cell search is completed, the user needs to obtain the system information of the cell to know the configuration of the cell (for example, system bandwidth, system frame number, and the like), so as to work in the cell.
  • the Synchronization Sigal Block is a signal structure suitable for use in 5G and later communication systems.
  • the sync signal block may also be referred to as a sync signal/physical broadcast channel block (SS/PBCH block), or may have other names, which is not limited in this application.
  • the synchronization signal block may generally include a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • the main function of PSS and SSS is to help the UE identify the cell and synchronize with the cell.
  • the PBCH contains the most basic system information such as system frame number and intraframe timing information.
  • the successful reception of the synchronization signal block by the UE is a prerequisite for its access to the cell.
  • the synchronization signal and the broadcast channel are formed in blocks in the time domain by a PSS-PBCH-SSS-PB
  • the synchronization signals used to support the user cell search mainly include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the cell system information is usually carried by a broadcast channel, wherein a master information block (MIB) in the cell system information is transmitted on a physical broadcast channel (PBCH) for carrying a certain number of system message.
  • MIB master information block
  • PBCH physical broadcast channel
  • the network device or user usually needs to follow the listen before talk (listen before talk) rule, that is, the channel needs to be listened to before the transmission, for example, the channel idle evaluation is performed. (clear channel assessment, CCA). If the channel is idle, it can be transmitted; otherwise, it cannot be transmitted. The CCA can be performed based on the channel energy threshold to determine whether the channel is idle or busy. Depending on the application scenario, the type of LBT will be different, which is reflected by the corresponding CCA duration.
  • the LBT can be divided into two types according to the duration of the CCA: one is a CCA based on interception and random backoff that needs to perform for a long time, and can be called a fourth type LBT (Cat4LBT); One type is a CCA that only needs to perform short-term listening and does not need to be randomly retired. It can be called a second type LBT (Cat2LBT), also called one-slot LBT. Of course, not all LBTs are required before transmission, such as an acknowledgement (ACK).
  • ACK acknowledgement
  • a synchronization burst set (SS burst set) proposed in this embodiment may include L SSBs, and the L SSBs are continuously transmitted, that is, no symbols are reserved between two adjacent SSBs.
  • the interval, or the symbol spacing between two adjacent SSBs is very small (eg, only the minimum time slot for beam direction switching is reserved) so that it is negligible.
  • SSBs form a SS burst set.
  • the transmission time window i.e., the maximum span in time) of a set of synchronization signal bursts is specified, for example, 5 ms.
  • the time interval of the transmission start point between two adjacent SS burst sets is configurable, for example, can be configured to be 20 ms, which may be referred to as a transmission period window.
  • the SS Burst Set is usually sent at the beginning of the transmission period window and sends the next SS Burst Set after the transmission start interval is 20 ms.
  • the start time of the SS burst Set transmission window is denoted as T0, and it can be understood that T0 is the reference transmission position of the first SSB.
  • T0 is the reference transmission position of the first SSB.
  • the spatial transmission directions of L SSBs in an SS burst set may be different, and the spatial transmission directions of several SSBs in one SS burst may be the same.
  • L is an integer greater than one.
  • L may also take a value such as an integer of 3, 8, or 64.
  • four SSBs are represented by SSB1, SSB2, SSB3, and SSB4, respectively.
  • the continuous SSB transmission mode is such that when the LBT is successfully performed, the maximum channel occupied time (MCOT) after the channel is successfully contiguous, so that the continuously transmitted SSB can be more in the same duration. Do it quickly, without having to do LBT multiple times.
  • MCOT maximum channel occupied time
  • the transmission start position of SSB1 is located at T0, and the reference transmission positions of subsequent SSBs are sequentially recurved, respectively T 2 , T 3 , and T 4 . It is assumed that the time required to transmit one SSB is Ts, and the adjacent SSB reference transmission position interval Ts. Accordingly, the terminal device searches for the SSB in the above time window.
  • the present application provides a synchronization signal transmission method in an unlicensed frequency band, which can be applied to the wireless communication system shown in FIG. 1 to solve the problem of transmitting a synchronization signal in a communication system with an LBT mechanism, and avoiding The impact of LBT failure on the receiving of the SSB by the terminal device.
  • the synchronization signal sending method in an embodiment of the present application includes the following steps:
  • step 301 the network device performs LBT before the start time T0 of transmitting the synchronization signal.
  • the network device When it is required to transmit a synchronization signal at T0, the network device needs to perform LBT before T0 to judge whether the channel is busy or idle. Illustratively, the network device performs channel sensing in a CCA manner. When it is determined that the channel is busy, step 302 is performed; when it is determined that the channel is idle, step S303 is performed.
  • Step 302 The network device performs LBT within a predetermined time period after the start time of transmitting the synchronization signal, and transmits the synchronization signal when the channel is idle.
  • the predetermined duration may be defined in a standard protocol, or may be configured during system initialization.
  • the predetermined duration may be a transmission duration T S of the SSB as a granularity, for example, at least one T S ; or the predetermined duration may be a granularity of a time unit of the communication system, for example, a duration occupied by one OFDM symbol.
  • Step 303 The network device sends a synchronization signal at a start time of transmitting the synchronization signal.
  • Step 304 The terminal device searches for and receives a synchronization signal, where the synchronization signal includes a plurality of consecutive synchronization signal blocks.
  • Step 305 The terminal device synchronizes with the network device according to the searched synchronization signal, and acquires system information of the network device.
  • the LBT When the LBT fails, the LBT is performed by delaying the predetermined synchronization signal transmission time by a predetermined length of time, and if the LBT is successful within a predetermined period of time, the network device transmits the synchronization signal.
  • the predetermined duration can be configured according to the requirements of the system to avoid the terminal being unable to access due to the failure of the LBT.
  • the transmission duration of the transmission SS Burst Set (ie, L consecutive SSBs) is T L
  • the predetermined duration is the granularity of T L
  • the foregoing transmission duration may be understood as the maximum duration of transmitting L consecutive SSBs, that is, the transmission of consecutive L SSBs in T L is required, and not necessarily the absolute value of the transmission duration of L SSBs.
  • the network device when the network device fails the LBT before the start time T0 of the synchronization signal burst collection transmission window, then in step 302, the network device does not send the SS Burst Set in the desired transmission window, and waits for the next transmission window. Try sending SSBs again.
  • the network device sets the start time of the SSB to be transmitted again to T0+T L , that is, performs LBT within the delay time T L at time T0. If the LBT is successful before T0+T L , the network device transmits a synchronization signal burst set at time T0+T L . If LBT fails before T0 + T L, the network device at a time T0 + T L T L long transmission delay continues, i.e.
  • SSB transmission start time is set to T0 + 2 ⁇ T L, and so on, can be used for transmission
  • the starting time of the synchronization signal burst set may also be T0+3 ⁇ T L , T0+4 ⁇ T L . It should be noted that the starting time available for transmitting the synchronization signal burst set is less than or equal to T0+T W -T L , where T W is the maximum value of the synchronization signal burst set transmission window, for example, 5 ms.
  • the network device when the network device fails to perform the LBT before the time of transmitting the Nth SSB in the L SSBs, the network device does not send the Nth SSB and performs before the time of transmitting the N+1th SSB.
  • LBT when the channel listening is successful, the network device performs LBT within N T Ls after the starting time T0, and when the channel is idle, the network device sends l synchronizations at time T0+N ⁇ T L a signal block, where N is an integer greater than or equal to 1, the l is less than or equal to the L, and the l is an integer greater than or equal to 1 to transmit the remaining SSBs of the N+1 SSB and the L SSBs .
  • the above actions are repeated until the channel interception before the L SSBs fails, or the remaining SSBs in the L SSBs are successfully transmitted.
  • the network device when the LBT fails before the start time T0 of the SS Burst Set transmission window, the network device does not transmit the SSB and performs LBT again in the delayed T S , that is, at the time T of transmitting the SSB 2 Perform LBT before 2 .
  • the LBT succeeds before time T 2
  • the network device may not transmit in the current L SSBs, and wait for the next time window for transmitting the L SSBs to try to send the SSBs. .
  • the network device may continue to attempt to transmit the SSB1 in the current synchronization signal burst set transmission period window (20 ms).
  • the difference from the embodiment shown in FIG. 5 is that the network device sends all L SSBs after the LBT succeeds before transmitting the N+1th SSB time, that is, continues from the first one.
  • the SSB starts transmitting. And so on, until the time when the L SSBs are transmitted, the LBT fails or the L SSBs are successfully transmitted.
  • the duration of transmitting 1 SSB is T S .
  • the network device delays LBT again within 1 T S , that is, at time T0+T S Perform LBT before.
  • a network device LBT successfully before time T0 + T S is transmitted at time T0 + T S and sequentially transmits the first SSB of the L SSBs.
  • the network device fails before the T0+T S time, the network device continues to delay L S to perform LBT again, that is, LBT is performed before T0+2 ⁇ T S time, when the network device is at T0+2 ⁇ T S time.
  • the first SSB is sent at time T0+2 ⁇ T S and L SSBs are sequentially transmitted.
  • the starting time of attempting to transmit the SSB may also be: T0+3 ⁇ T S , T0+4 ⁇ T S .
  • the network device when the LBT fails before the start time T0 of the SS Burst Set transmission window, the network device does not transmit the SSB and performs LBT before the time T 2 of transmitting the SSB 2 .
  • the LBT is successful before time T 2
  • SSB 1 to SSB 4 are transmitted.
  • the network device does not transmit the SSB and performs LBT before the time T 3 of transmitting the SSB 3.
  • the difference from the embodiment shown in FIG. 5 is that the network device sends the remaining part of the L SSBs after the LBT succeeds before transmitting the N+1th SSB time (total L-(N) +1) SSB(s)), and the Nth SSB that was not transmitted due to the LBT failure before transmitting the remaining portion of the L SSBs.
  • the network device when the LBT fails before the start time T 0 of the SS Burst Set transmission window, the network device does not transmit the SSB and performs LBT before the time when the SSB 2 is transmitted.
  • the LBT succeeds before the time T 2
  • the SSB 2 to SSB 4 are transmitted, and the SSB 1 is continuously transmitted after the SSB 4 transmission is completed.
  • the network device fails before time T 2
  • the network device does not transmit the SSB and performs LBT before the time T 3 of transmitting the SSB 3.
  • the granularity of the predetermined duration is the duration occupied by one OFDM symbol.
  • the network device fails before the start time T0 of the SS Burst Set transmission window, then in step 302, The network device does not transmit the SSB at T0, but delays 1 OFDM symbol at time T0 to perform LBT again.
  • T OFDM is used to indicate the transmission duration of one OFDM symbol, that is, the starting time of attempting to transmit the SSB again is set to T0+T OFDM .
  • the LBT before time T0+T OFDM is successful, the network device starts transmitting the SSB at time T0+T OFDM .
  • the network device When the LBT fails before time T0+T OFDM , the network device attempts to transmit the SSB again by delaying 1 OFDM symbol in T0+T OFDM , that is, the starting time of transmitting the SSB is set to T0+2 ⁇ T OFDM . In this embodiment, after the LBT fails before a certain time, the network device delays 1 OFDM symbol for LBT transmission, that is, the network device performs LBT again with a granularity of 1 OFDM symbol.
  • the granularity of the predetermined duration may also be other transmission time intervals (TTIs), such as slots, mini slots.
  • TTIs transmission time intervals
  • the network device if the LBT fails before the SS Burst Set transmission window start time T0, the network device is not in the SS Burst Set transmission period window (for example: 20 ms), but waits for the next one.
  • the transmission cycle window tries to send again.
  • the duration of the channel occupied time (COT) is greater than or equal to the length of time required to transmit the SS Burst Set.
  • the SS Burst Set can be transferred within the COT.
  • the triggered COT is less than the time required to transmit L SSBs, the SSB(s) falling outside the COT still needs to re-execute the LBT and acquire the COT for transmission.
  • the SSB transmission modes shown in FIG. 4 to FIG. 8 may be pre-defined in a standard protocol in the form of a transmission pattern, and the network device performs transmission of the synchronization signal according to the transmission. It can be understood that if only one of the transmission patterns is selected by default in the standard protocol, no indication is needed. In other embodiments, if the network device supports two or more of the foregoing transmission patterns, the network device needs to send indication information (eg, an indication bit) for indicating to the user the currently used transmission. pattern. Illustratively, the indication information can be carried in the SSB. In addition, the foregoing indication information may also adopt a dynamic indication manner, so that the adopted transmission pattern may be dynamically adjusted according to the network condition during the running of the system.
  • indication information eg, an indication bit
  • the present application does not exclude the use of the transmission pattern of the SSB in the licensed frequency band, which may exist as an optional transmission pattern.
  • the network device when the network device performs LBT to determine that the channel is idle, and the occupied COT only needs to transmit the SSB, the network device can perform a relatively short listening time and does not need to back off the LBT, for example: Cat2LBT, or 1 One-slot LBT.
  • the network device can perform a relatively long time based on the interception and the random backoff.
  • LBT for example: Type 4 is heard first (Cat4LBT).
  • the network device when the network device has occupied one COT before the transmission reference position (eg, T0) of the SSB and the remaining time is insufficient to transmit L SSBs, there are two ways of processing.
  • a processing method please refer to FIG. 12, the network device truncates the current COT, and performs LBT before the transmission reference position of the SSB.
  • FIG. 13 For another processing method, please refer to FIG. 13. The network device does not need to perform LBT to complete the SSBs transmission remaining in the remaining time of the COT, and the remaining SSBs need to be transmitted after the LBT.
  • the network device occupies enough COTs before the transmission reference position of the SSB, that is, when the L SSBs fall within the existing COT, the network device may not perform the LBT before the transmission reference position of the SSB. And directly send L SSBs, this can be referred to Figure 14.
  • Embodiments of the method for transmitting a synchronization signal of the present application are explained in detail below. Embodiments of the network device and the terminal device of the present application will be further described below.
  • a structure of a network device includes a processor (or controller) and a transceiver.
  • a communication unit may also be included in the structure of the network device. The communication unit is used to support communication with other network side devices, such as communication with core network nodes.
  • the structure of the network device may further include a memory coupled to the processor for storing necessary program instructions and data of the network device.
  • the structure of the network device involved in the present application includes a transceiver 1501, a processor 1502, a memory 1503, and a communication unit 1504.
  • the transceiver 1501, the processor 1502, the memory 1503, and the communication unit 1504 pass Bus connection.
  • transceiver 1501 On the downlink, data or signaling to be transmitted (including the downlink control information described above) is adjusted by the transceiver 1501 to output samples and generate a downlink signal, which is transmitted via an antenna to the above-described embodiment. Terminal Equipment.
  • the antenna receives the uplink signal transmitted by the terminal device in the above embodiment, and the transceiver 1502 adjusts the signal received from the antenna and provides input samples.
  • the service data and the signaling message are processed, for example, data to be transmitted, SC-FDMA symbol generation, and the like. These units are processed according to the radio access technologies employed by the radio access network (e.g., access technologies for LTE, 5G, and other evolved systems).
  • transceiver 1502 is integrated by a transmitter and a receiver. In other embodiments, the transmitter and receiver may also be independent of one another.
  • the processor 1502 is further configured to perform control management on actions of the network device, to perform processing performed by the network device in the foregoing embodiment, for example, to control the network device to process the SSB and/or perform the operations described in the present application. Other processes of technology.
  • the processor 1502 is configured to support the network device to perform the processing procedure related to the network device in FIG. 2 to FIG. 14, for example, step 301 in FIG.
  • the processor 1502 performs channel sensing and competes for channel occupancy time.
  • processor 1502 performs channel sensing based on signals received by transceiver 1502 from the antenna and controls the transceiver to transmit signals from the antenna to occupy the channel.
  • the processor 1502 may include one or more processors, for example, including one or more central processing units (CPUs), and the processor 1502 may be integrated in the chip, or may be the chip itself. .
  • the memory 1503 is configured to store related instructions and data, as well as program codes and data of the network device.
  • the memory 1503 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), and an erasable programmable read-only memory (Erasable Programmable Read). Only Memory, EPROM), or Compact Disc Read-Only Memory (CD-ROM).
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • CD-ROM Compact Disc Read-Only Memory
  • Figure 15 only shows a simplified design of the network device.
  • the network device may include any number of transmitters, receivers, processors, memories, etc., and all network devices that can implement the present application are within the scope of the present application.
  • the structure of the terminal device includes a processor (or controller), a transceiver, and a modem processor.
  • the structure of the network device may further include a memory coupled to the processor for storing necessary program instructions and data of the network device.
  • Fig. 16 is a simplified schematic diagram showing a possible design structure of the terminal device involved in the above embodiment.
  • the terminal device includes a transceiver 1601, a processor 1602, a memory 1603 and a modem processor 1604, a transceiver 1601, a processor 1602, a memory 1603, and a modem processor 1604 connected by a bus.
  • the transceiver 1601 conditions (e.g., analog conversion, filtering, amplifying, upconverting, etc.) output samples and generates an uplink signal that is transmitted via an antenna to the network device described in the above embodiments.
  • the antenna receives the downlink signal transmitted by the base station in the above embodiment.
  • Transceiver 160 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples.
  • the encoder 1641 receives the traffic data and signaling messages to be transmitted on the uplink and processes the traffic data and signaling messages (eg, formatting, encoding, and Interwoven).
  • Modulator 1642 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples.
  • Demodulator 1643 processes (e.g., demodulates) the input samples and provides symbol estimates.
  • the decoder 1644 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the terminal device.
  • Encoder 1641, modulator 1642, demodulator 1643, and decoder 1644 may be implemented by a composite modem processor 1604. These units are processed according to the radio access technologies employed by the radio access network (e.g., access technologies for LTE, 5G, and other evolved systems).
  • the transceiver 1601 is integrated by a transmitter and a receiver. In other embodiments, the transmitter and receiver may also be independent of one another.
  • the processor 1602 controls and manages the actions of the terminal device for performing the processing performed by the terminal device in the above embodiment. For example, it is used to control other processes in which the terminal device performs processing according to the received paging indication information and/or the techniques described herein.
  • the processor 1602 is configured to support the terminal device to perform the processing procedure involving the terminal device in FIGS. 2 to 14.
  • the transceiver 1601 is configured to search and receive a synchronization signal sent by the network device through an antenna, and the processor 1602 is configured to acquire system information according to the synchronization signal.
  • the processor 1602 can include one or more processors, for example, including one or more CPUs, and the processor 1602 can be integrated into the chip or can be the chip itself.
  • the memory 1603 is used to store related instructions and data, as well as program codes and data of the terminal device.
  • the memory 703 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), and an erasable programmable read only memory (Erasable Programmable Read). Only Memory, EPROM), or Compact Disc Read-Only Memory (CD-ROM).
  • Figure 16 only shows a simplified design of the terminal device.
  • the terminal device may include any number of transmitters, receivers, processors, memories, etc., and all terminal devices that can implement the present application are within the scope of the present application.
  • the computer program product includes one or more computer instructions.
  • 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 Transfer to another website site, computer, server, or data center by wire (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 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)).
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

Landscapes

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

Abstract

本申请提供一种应用于非授权频段的同步信号的发送方法，为了保证传输的公平性，网络设备在传输同步信号的起始时刻之前进行先听后说LBT，以判断信道为忙或者空闲；当信道为忙时，则网络设备无法在期望的传输同步信号的起始时刻进行同步信号传输，因此网络设备在所述起始时刻后预定的时长内再次进行LBT，并在再次进行LBT确定信道空闲时发送同步信号；当信道为空闲时，网络设备抢占到信道资源，并在期望的传输同步信号的起始时刻发送所述同步信号。

Description

一种非授权频段上同步信号的发送方法、网络设备及终端设备 技术领域
本申请涉及通信技术领域，尤其涉及非授权频段场景下同步信号的映射方法及设备。
背景技术
无线通信技术的飞速发展，导致授权频谱资源日益紧缺，促进了对于非授权频段的探索。鉴于此，3GPP在版本13(Release 13，R-13)引入了授权频谱辅助接入(license assisted access，LAA)技术，以及版本14(Release 14，R-14)引入了增强的授权频谱辅助接入(enhanced LAA,eLAA)技术，通过授权频谱的辅助来最大可能的利用非授权频谱资源。在第五代(5 th generation，5G)新空口(New Radio，NR)系统中，非授权频段的应用仍然是一个满足业务需求、提升用户体验的技术手段。
由于在非授权频段会存在多个通讯系统公用某个频段的情况，为了保证公平性，在非授权频谱上进行传输的设备通常需要遵守先听后说(listen before talk，LBT)规则，即在发送之前需要先进行侦听信道，只有在信道为空闲时才能开始传输。
在5G NR系统中，支持用户进行小区搜索的同步信号会以多个块组合的方式发送。为了满足在非授权场景下由于LBT规则的要求，如何进行同步信号的发送成为了亟待解决的问题。
发明内容
本申请实施例提供了一种应用于非授权频段上的同步信号的发送方法、网络设备及终端设备，提出了非授权频段场景下同步信号的发送机制，解决了上述问题。
为达到上述目的，本申请实施例提供了如下技术方案：
第一方面，本申请提供一种应用于非授权频段的同步信号的发送方法，为了保证传输的公平性，网络设备在传输同步信号的起始时刻之前进行先听后说LBT，以判断信道为忙或者空闲；当信道为忙时，则网络设备无法在期望的传输同步信号的起始时刻进行同步信号传输，因此网络设备在所述起始时刻后预定的时长内再次进行LBT，并在再次进行LBT确定信道空闲时发送同步信号；当信道为空闲时，网络设备抢占到信道资源，并在期望的传输同步信号的起始时刻发送所述同步信号。
从而，在LBT确定信道繁忙时，网络设备能够在延迟的一定时间内再次进行LBT，使得由于信道忙时未能成功发送的同步信号块能够及时地发送，保证终端设备的接入。
在一种可能的设计中，上述同步信号包括L个同步信号块，所述预定的时长为至少一个用于传输所述同步信号块的时长T L，L为大于或者等于2的整数。
在又一种可能的设计中，上述预定的时长以用于传输1个同步信号块的时长Ts为粒度，即网络设备在传输同步信号的起始时刻T0之后N个T S内进行LBT，当信 道空闲时，所述网络设备在时刻T0+N×T L发送l个同步信号块，所述N为大于或者等于1的整数，所述l小于或者等于所述L，所述l为大于或者等于1的整数。
在又一种可能的设计中，上述预定的时长以正交频分复用OFDM符号为粒度，所述预定的时长为至少一个正交频分复用OFDM符号所占用的时长T OFDM，所述网络设备在所述起始时刻之后M个T OFDM内进行LBT，当信道空闲时，所述网络设备在时刻T0+M×T OFDM发送所述同步信号，所述M为大于或者等于1的整数。
所述网络设备在所述起始时刻之后M个T OFDM内进行LBT，当信道空闲时，所述网络设备在时刻T0+M×T OFDM发送所述同步信号，所述M为大于或者等于1的整数。
第二方面，本申请提供一种非授权频段上同步信号的接收方法，包括：
终端设备搜索并接收同步信号，所述同步信号包括连续的L个同步信号块，所述L为大于或者等于2的整数；终端设备根据搜索到的所述同步信号获取所述网络设备对应的系统信息。
第三方面，本申请提供一种网络设备，包括处理器和与该处理器通过总线连接的收发器，其中，所述处理器，用于控制所述收发器在传输同步信号的起始时刻之前进行先听后说LBT，以判断信道为忙或者空闲；当信道为忙时，所述收发器在所述起始时刻后预定的时长内进行LBT，并在信道空闲时发送所述同步信号；当信道为空闲时，所述收发器在所述起始时刻发送所述同步信号。
第四方面，本申请的实施例提供一种同步信号的发送装置，该同步信号的发送装置具有实现上述方法实施例中网络设备的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面，本申请的实施例提供一种终端设备，包括收发器，用于搜索并接收同步信号，所述同步信号包括连续的L个同步信号块，所述L为大于或者等于2的整数；与该收发器连接的处理器，用于根据搜索到的所述同步信号获取所述网络设备对应的系统信息。
第六方面，本申请的实施例提供一种同步信号的接收装置，该同步信号的发送装置具有实现上述方法实施例中网络设备的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第七方面，本申请的实施例提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行以上第一方面或者第二方面所述的方法。
第八方面，一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面或者第二方面所述的方法。
另外，第二方面至第八方面中任一种设计方式所带来的技术效果可参见第一方面中不同设计方式所带来的技术效果，此处不再赘述。
本发明的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
图1所示为本申请实施例提供的一种可能的网络架构示意图；
图2所示为本申请实施例提供的一种同步信号块SSB的示意图；
图3所示为本申请实施例提供的方法的流程交互示意图；
图4所示为本申请一实施例提供的同步信号块发送示意图；
图5所示为本申请又一实施例提供的同步信号块发送示意图；
图6所示为本申请又一实施例提供的同步信号块发送示意图；
图7所示为本申请又一实施例提供的同步信号块发送示意图；
图8所示为本申请又一实施例提供的同步信号块发送示意图；
图9所示为本申请又一实施例提供的同步信号块发送示意图；
图10所示为本申请一实施例提供的LBT示意图；
图11所示为本申请又一实施例提供的LBT示意图；
图12所示为本申请又一实施例提供的LBT示意图；
图13所示为本申请又一实施例提供的LBT示意图；
图14所示为本申请又一实施例提供的LBT示意图；
图15所示为本申请一实施例提供的网络设备的简化示意图；
图16所示为本申请一实施例提供的终端设备的简化示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
请参见图1，是应用本申请实施例的网络架构的简化示意图，该网络架构可以是无线通信系统的网络架构，无线通信系统可以工作在授权频段，也可以工作在非授权频段。可以理解的是，非授权频段的使用可以提高无线通信系统的系统容量。
如图1所示，无线通信系统可以包括网络设备和终端设备，网络设备与终端设备之间通过无线通信技术连接。需要说明的是，图1所示的终端设备和网络设备的数量和形态并不构成对本申请实施例的限定。在不同的实施方式中，一个网络设备可以连接一个或多个终端设备。网络设备还可以连接到核心网设备，核心网设备未在图1中示出。
需要说明的是，本申请实施例提及的无线通信系统包括但不限于：窄带物联网系统(narrow band-internet of things，NB-IoT)、全球移动通信系统(global system for mobile communications，GSM)、增强型数据速率GSM演进系统(enhanced data rate for GSM evolution，EDGE)、宽带码分多址系统(wideband code division multiple access，WCDMA)、码分多址2000系统(code division multiple access，CDMA2000)、时分同步码分多址系统(time division-synchronization code division multiple access，TD-SCDMA)，长期演进系统(long term evolution，LTE)、第五代移动通信系统以及未来移动通信系统。
本申请实施例中，上述网络设备是一种部署在无线接入网中，为终端设备提供无线通信功能的装置。网络设备可以包括但不限于基站(Base Station，BS)、网络控制器、传输接收点(transmission and reception point，TRP)、移动交换中心或者wifi 中的无线接入点等，示例性地，通过无线信道与终端设备进行直接通信的装置通常是基站。所述基站可以包括各种形式的宏基站、微基站、中继站、接入点或射频拉远单元(Remote Radio Unit，RRU)等。当然，与终端设备进行无线通信的也可以是其他具有无线通信功能的网络设备，本申请对此不做唯一限定。需要说明的是，在不同系统中，具备基站功能的设备的名称可能会有所不同，例如在LTE网络中，称为演进的节点B(evolved NodeB，eNB或eNodeB)，在第三代(the 3rd Generation，3G)网络中，称为节点B(Node B)等，在5G网络中，称为5G基站(NR NodeB，gNB)。
终端设备，又称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是一种向用户提供语音和/或数据连通信的设备，例如，具有无线连接功能的手持式设备、车载设备、可穿戴设备、计算设备或链接到无线调制解调器的其他处理设备。目前，一些终端设备的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。
本申请中，名词“网络”和“系统”可能会交替使用，名词“用户”和“终端设备”可能会交替使用，但本领域的技术人员可以理解其含义。另外，本文中的部分英文简称是以LTE系统为例对本申请实施例进行的描述，其可能随着网络的演进发生变化，具体演进可以参考相应标准中的描述。
在用户接入网络的过程中，需要经过小区搜索、获取小区系统信息、随机接入等过程。其中，小区搜索的主要目的是与小区取得频率和符号的同步，获取系统帧定时以及确定小区的物理标识。在完成小区搜索之后，用户需要获取小区的系统信息(system information)，才能知道小区的配置(例如系统带宽、系统帧号等信息)，以便于工作在该小区内。
同步信号块(Synchronization Sigal Block，SSB)是一种信号结构，适用于5G以及之后的通信系统中。同步信号块还可以称为同步信号/物理广播信道块(SS/PBCH block)，或者还可以有其他名称，本申请对此不做限制。同步信号块一般可以包括主同步信号(Primary Synchronization Sigal，PSS)、辅同步信号(Secondary Synchronization Signal，SSS)以及物理广播信道(Physical Broadcast Channel，PBCH)。PSS和SSS主要作用是帮助UE识别小区以及和小区进行同步，PBCH则包含了最基本的系统信息例如系统帧号、帧内定时信息等。UE成功接收同步信号块是其接入该小区的前提。在5G新空口(New Radio，NR)系统中，同步信号和广播信道以PSS-PBCH-SSS-PBCH组成同步信号块(synchronization signal block，SSB)在时域上成块传输。
一般来说，用于支持用户小区搜索的同步信号主要有主同步信号(primary synchronization signal，PSS)和辅同步信号(secondary synchronization signal，SSS)。 小区系统信息通常由广播信道(broadcast channel)携带，其中，小区系统信息中的主信息块(master information block，MIB)在物理广播信道(physical broadcast channel，PBCH)上传输，用于携带一定数量的系统信息。
在非授权频段应用场景下，网络设备或者用户在进行传输前通常需要遵守先听后说(listen before talk，先听后说)规则，即在发送之前需要先侦听信道，例如进行信道空闲评估(clear channel assessment，CCA)。如果信道空闲，则可以传输；反之，则不能传输。CCA可以基于信道能量门限进行，以判断信道为空闲或者忙。根据不同的应用场景，LBT的类型会有所不同，其体现为所对应的CCA持续时间不同。示例性地，可以根据CCA所持续的时间将LBT分为两种类型：一类是需要执行较长时间的基于侦听和随机退避的CCA，可被称为第四类LBT(Cat4LBT)；另一类是仅需要执行较短时间侦听且无需随机退避的CCA，可被称为第二类LBT(Cat2LBT)，也称为one-slot LBT。当然，并非所有传输前都需要LBT，比如应答消息(acknowledgement，ACK)。
请参照图2，本申请实施例提出的一个同步信号突发集合(SS burst Set)中可以包括L个SSBs，且该L个SSBs连续传输，即两个相邻的SSB之间不预留符号间隔，或者两个相邻的SSB之间符号间隔非常小(比如，仅保留用于波束方向切换的最小时隙)以至于可以忽略不计。在时域上，L个(例如：L＝4)SSBs组成一个同步信号突发集合(SS burst set)。一个同步信号突发集合的传输时间窗口(即在时间上的最大跨度)是指定的，例如可以为5ms。两个相邻的SS burst sets之间传输起点的时间间隔是可配置的，例如可以配置为20ms，该时间间隔可被称为传输周期窗口。SS Burst Set通常在该传输周期窗口的开始时发送，并在传输起点间隔20ms后发送下一个SS Burst Set。为了便于描述，将SS burst Set传输窗口的起始时刻记作T0，可以理解，T0为第一个SSB的参考传输位置。一个SS burst set内的L个SSBs的空间传输方向可以不同，一个SS burst内的若干个SSBs的空间传输方向可以相同。
其中，L为大于1的整数。在本实施例中，以L＝4为例进行说明。在其他的实施例中，L还可以取值为，例如：3、8或者64等整数。为了描述的方便，在下文中4个SSBs用SSB1、SSB2、SSB3以及SSB4分别表示。
上述连续的SSB传输方式，使得在需要进行LBT的场景下，其成功竞争到信道之后的最大占用时间(max channel occupy time，MCOT)有限时，从而连续传输的SSB可以能在相同的时长内更快地进行，而不需要多次进行LBT。
当网络设备在T0时刻之前LBT成功时，则SSB1的传输起始位置位于T0，后续SSB的参考传输位置依次递推，分别为T 2、T 3以及T 4。假定传输一个SSB所需时长为Ts，及相邻的SSB参考传输位置间隔Ts。相应地，终端设备在上述时间窗口搜索SSB。
当网络设备在T0时刻之前LBT失败时，则无法在期望的T0时刻开始传输SSB1。请参照图3，本申请提出一种非授权频段下的同步信号发送方法，其可以应用于图1所示的无线通信系统，解决了存在LBT机制的通讯系统中同步信号的发送问题，避免由于LBT失败对终端设备接收SSB的影响。如图3所示，本申请一个实施例中的同步信号发送方法包括以下步骤：
步骤301，网络设备在传输同步信号的起始时刻T0之前进行LBT。
当需要在T0发送同步信号时，网络设备需要进行在T0之前进行LBT，以判断信道为忙或者空闲。示例性地，网络设备采用CCA的方式进行信道侦听。当判定信道为忙时，执行步骤302；当判定信道为空闲时，执行步骤S303。
步骤302，网络设备在传输同步信号的起始时刻后预定的时长内进行LBT，并在信道空闲时发送同步信号。
其中，上述预定的时长可以是在标准协议中定义的，也可以是在系统初始化时配置的。示例性地，该预定的时长可以SSB的传输时长T S为粒度，例如为至少一个T S；或者，该预定的时长可以通信系统的时间单元为粒度，例如为一个OFDM符号所占用的时长。
步骤303，网络设备在传输同步信号的起始时刻发送同步信号。
步骤304，终端设备搜索并接收同步信号，所述同步信号中包括连续的多个同步信号块。
步骤305，终端设备根据搜索到的同步信号与网络设备同步，并获取网络设备的系统信息。
当LBT失败时，通过在期望的同步信号发送时刻延迟预定的时长进行LBT，若在预定的时长内LBT成功时，网络设备发送同步信号。该预定的时长可以根据系统的要求进行相应的配置，以避免由于LBT失败而导致的终端不能接入。
以下，将结合图4～图14，对本申请实施例的技术方案进行示例性的描述。
假定传输SS Burst Set(即L个连续SSBs)的传输时长为T L，预定的时长以T L为粒度。在不同的实施方式中，上述传输时长可以理解为传输L个连续SSBs的最大时长，即要求在T L内将连续的L个SSBs传输完成，而不一定是L个SSBs传输时长的绝对值。
请参见图4，当网络设备在同步信号突发集合传输窗口的起始时刻T0前LBT失败时，则在步骤302中，网络设备不在期望传输窗口内发送SS Burst Set，而等待下一个传输窗口再尝试发送SSBs。网络设备将再次传输SSB的起始时刻设置为T0+T L，即将在T0时刻延迟时长T L内进行LBT。如果在T0+T L之前LBT成功时，网络设备在时刻T0+T L发送同步信号突发集合。如果在T0+T L之前LBT失败时，则网络设备在T0+T L时刻继续延迟时长T L传输，即将传输SSB的起始时刻设置为T0+2×T L，依此类推，可用于传输同步信号突发集合的起始时刻还可以为T0+3×T L、T0+4×T L。需要说明的是，可用于传输同步信号突发集合的起始时刻小于或者等于T0+T W-T L，其中T W为同步信号突发集合传输窗口的最大值，例如5ms。
在又一个实施方式中，当网络设备在传输L个SSB中第N个SSB的时刻前进行LBT失败时，则网络设备不发送第N个SSB并在传输第N+1个SSB的时刻前进行LBT，当信道侦听成功时，所述网络设备在所述起始时刻T0之后N个T L内进行LBT，当信道空闲时，所述网络设备在时刻T0+N×T L发送l个同步信号块，其中N为大于或者等于1的整数，所述l小于或者等于所述L，所述l为大于或者等于1的整数，以发送第N+1个SSB及L个SSBs中剩余的SSBs。重复上述动作，直到L个SSBs前的信道侦听都失败，或者这L个SSBs中剩余的SSBs发送成功。
示例性地，请参照图5，当在SS Burst Set传输窗口的起始时刻T0前LBT失败时，则网络设备不发送SSB并在延迟的T S内再次进行LBT，即在传输SSB2的时刻T 2前进行LBT。当时刻T 2前LBT成功时，发送SSB2及其之后的2(l＝L-2＝2)个SSBs。当在传输SSB2的时刻T 2前LBT失败时，则网络设备不发送SSB2并在延迟的T S内再次进行LBT，即传输SSB3的时刻T 3前进行LBT，以发送SSB3及其之后的1(l＝L-3＝1)个SSB，依此类推，直到传输L个SSBs的时刻前LBT均失败或者L个SSBs中剩余的SSB发送成功。
可选地，如果L个SSBs传输时刻前的LBT都失败，则可参照图4所提供的方式，网络设备不在当前L个SSBs传输，而等待下一个传输L个SSBs的时间窗口再尝试发送SSBs。
可选地，如果L个SSBs传输时刻前的LBT都失败，则网络设备可以在当前同步信号突发集合传输周期窗口(20ms)继续尝试传输SSB1。
在又一个实施例中，其与图5所示的实施例的区别在于：网络设备在传输第N+1个SSB时刻前进行LBT成功后，发送全部的L个SSBs，即继续从第1个SSB开始传输。依此类推，直到传输L个SSBs的时刻前LBT均失败或者L个SSBs发送成功。
假定传输1个SSB的时长为T S，当网络设备在传输SS Burst Set窗口的起始时刻T0前LBT失败时，则网络设备延迟1个T S内再次进行LBT，即在T0+T S时刻前进行LBT。当网络设备在T0+T S时刻前LBT成功时，则在T0+T S时刻发送第一个SSB且依序发送L个SSBs。当网络设备在T0+T S时刻前LBT失败时，则网络设备继续延迟T S内再次进行LBT，即在T0+2×T S时刻前进行LBT，当网络设备在T0+2×T S时刻前LBT成功时，则在T0+2×T S时刻发送第一个SSB且依序发送L个SSBs。依此类推，尝试传输SSB的起始时刻还可以为：T0+3×T S、T0+4×T S。
示例性地，请参照图6，当在SS Burst Set传输窗口的起始时刻T0前LBT失败时，则网络设备不发送SSB并在传输SSB2的时刻T 2前进行LBT。当时刻T 2前LBT成功时，发送SSB 1～SSB 4。当在时刻T 2前LBT失败时，则网络设备不发送SSB并在传输SSB 3的时刻T 3前进行LBT。
在又一个实施例中，其与图5所示的实施例的区别在于：网络设备在传输第N+1个SSB时刻前进行LBT成功后，发送L个SSBs中剩余部分(共计L－(N+1)个SSB(s))，并在发送完成L个SSBs中剩余部分后继续发送之前因LBT失败而未发送的第N个SSB。
示例性地，请参照图7，当在SS Burst Set传输窗口的起始时刻T 0前LBT失败时，则网络设备不发送SSB并在传输SSB 2的时刻前进行LBT。当在时刻T 2前LBT成功时，发送SSB 2～SSB 4，并在SSB 4发送完成后继续发送SSB 1。当在时刻T 2前LBT失败时，则网络设备不发送SSB并在传输SSB 3的时刻T 3前进行LBT。
请参照图8，在又一个实施例中，预定时长的粒度为一个OFDM符号所占用的时长，当网络设备在SS Burst Set传输窗口的起始时刻T0前LBT失败时，则在步骤302中，网络设备不在T0传输SSB，而在T0时刻延迟1个OFDM符号再次进行LBT。为了便于描述，用T OFDM表示1个OFDM符号的传输时长，即将再次尝试传输SSB的起始时刻设置为T0+T OFDM。当时刻T0+T OFDM前的LBT成功时，网络设备在时刻 T0+T OFDM开始传输SSB。当时刻T0+T OFDM之前LBT失败时，则网络设备在T0+T OFDM延迟1个OFDM符号再次尝试传输SSB，即将传输SSB的起始时刻设置为T0+2×T OFDM。在本实施例中，当在某一个时刻前LBT失败之后，网络设备延迟1个OFDM符号进行LBT传输，即网络设备再次进行LBT的粒度为1个OFDM符号。
在其它的实施方式中，预定的时长的粒度还可以为其它发送时间间隔(transmission time interval，TTI)，例如时隙(slot)，微时隙(mini slot)。
请参照图9，在又一个实施例中，如果在SS Burst Set传输窗口起始时刻T0前LBT失败，则网络设备不在该SS Burst Set传输周期窗口(例如为：20ms)，而是等待下一个传输周期窗口再尝试发送。
需要说明的是，在本申请的各个实施例中，当在某一个时刻LBT成功，所触发的信道占用时间(channel occupy time，COT)的时长大于或者等于传输SS Burst Set所需的时长时，该SS Burst Set可以在该COT内传输完成。当所触发的COT小于传输L个SSBs所需的时长时，落入COT以外的SSB(s)仍然需要重新进行LBT并获取COT才能进行传输。
在其它的实施例中，图4～图8所示的SSB传输方式可以以传输图样(pattern)的形式在标准协议中预先定义，网络设备按照传输同样进行同步信号的发送。可以理解的是，如果标准协议中只默认选择其中的一种传输图样，则无需进行指示。在另一些实施例中，如果网络设备支持上述传输图样中的两种或者多种时，则网络设备需要发送指示信息(例如：指示比特)，该指示信息用于向用户指示当前所采用的传输图样。示例性地，该指示信息可以承载在SSB中发送。另外，上述指示信息也可以采用动态指示的方式，这样，可以在系统运行的过程中根据网络状况动态地调整所采用的传输图样。
另外，即使该方案主要应用于非授权频段的场景下，本申请不排除授权频段中SSB的传输图样的使用，其可以作为一种可选的传输图样存在。
以下，针对不同实施例中传输SSB之前所执行的LBT类型进行示例性地说明：
示例性地，请参照图10，当网络设备执行LBT确定信道空闲，所占用的COT只需要传输SSB时，网络设备可以执行相对较短侦听时间且无需退避的LBT，例如：Cat2LBT，或者1个时隙(One-slot)LBT。
示例性地，请参照图11，由于SSB只占用部分带宽，剩余带宽可以用来传输数据。当网络设备执行LBT确定信道空闲，所占用的COT同时传输SSB和数据时，例如下行共享物理信道(physical downlink shared channel，PDSCH)，网络设备可以执行相对较长时间的基于侦听和随机退避的LBT，例如：类型4先听后说(Cat4LBT)。
示例性地，当在SSB的传输参考位置(例如T0)之前，网络设备已经占用了一个COT且剩余的时间不足以传完L个SSBs时，有两种处理方式。一种处理方式请参照图12，网络设备将当前COT截短，在SSB的传输参考位置之前做LBT。另一种处理方式请参照图13，网络设备在不需要进行LBT把落入COT剩余时间内的SSBs传输完成，剩余的SSBs的传输则需要进行LBT之后再进行。
当然，网络设备在SSB的传输参考位置之前所占用的COT足以传完L个SSBs， 即L个SSBs正好落入已经存在的COT内时，则网络设备在SSB的传输参考位置之前可以不执行LBT，而直接发送L个SSBs，这种情况可以参照图14。
上面详细阐述了本申请的同步信号的传输方法的实施例下面将继续阐述本申请的网络设备及终端设备的实施例。
先说明网络设备的实施方式，在一个具体的示例中，网络设备的结构中包括处理器(或称：控制器)和收发器。在一个可能的示例中，网络设备的结构中还可以包括通信单元。该通信单元用于支持与其他网络侧设备之间的通信，如与核心网节点之间的通信。在一个可能的示例中，所述网络设备的结构中还可以包括存储器，所述存储器与处理器耦合，用于保存网络设备必要的程序指令和数据。
请参照图15，其示出了上述实施方式中所涉及的网络设备的一种可能的简化结构示意图。在图15所对应的示例中，本申请所涉及的网络设备的结构中包括收发器1501、处理器1502、存储器1503和通信单元1504，收发器1501、处理器1502、存储器1503和通信单元1504通过总线连接。
在下行链路上，待发送的数据或信令(包括上述下行控制信息)经过收发器1501调节输出采样并生成下行链路信号，该下行链路信号经由天线发射给上述实施例中所述的终端设备。在上行链路上，天线接收上述实施例中终端设备发射的上行链路信号，收发器1502调节从天线接收的信号并提供输入采样。在处理器1502中，对业务数据和信令消息进行处理，例如对待发送的数据进行调制、SC-FDMA符号生成等。这些单元根据无线接入网采用的无线接入技术(例如，LTE、5G及其他演进系统的接入技术)来进行处理。在图15所示的实施方式中，收发器1502由发射器和接收器集成。在其他的实施方式中，发射器和接收器也可以相互独立。
所述处理器1502还用于对网络设备的动作进行控制管理，用于执行上述实施例中由网络设备进行的处理，例如用于控制网络设备对SSB进行处理和/或进行本申请所描述的技术的其他过程。作为示例，处理器1502用于支持网络设备执行图2～图14中涉及网络设备的处理过程，例如图3中步骤301。应用于非授权场景下时，处理器1502进行信道侦听并竞争到信道占用时间。示例性地，处理器1502基于收发器1502从天线所接收到的信号来进行信道侦听，并控制收发器从天线发送信号来占用信道。在不同的实施方式中，处理器1502可以包括一个或多个处理器，例如包括一个或多个中央处理器(Central Processing Unit，CPU)，处理器1502可以集成于芯片中，或者可以为芯片本身。
存储器1503用于存储相关指令及数据，以及所述网络设备的程序代码和数据。在不同的实施方式中，存储器1503包括但不限于是随机存储记忆体(Random Access Memory，RAM)、只读存储器(Read-Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable Read Only Memory，EPROM)、或便携式只读存储器(Compact Disc Read-Only Memory，CD-ROM)。
可以理解的是，图15仅仅示出了所述网络设备的简化设计。在实际应用中，所述网络设备可以包含任意数量的发射器，接收器，处理器，存储器等，而所有可以实现本申请的网络设备都在本申请的保护范围之内。
接下来，说明终端设备的实施方式，在一个具体的实例中，终端设备的结构中 包括处理器(或称：控制器)、收发器和调制解调处理器。在一个可能的示例中，所述网络设备的结构中还可以包括存储器，所述存储器与处理器耦合，用于保存网络设备必要的程序指令和数据。
图16示出了上述实施例中所涉及的终端设备的一种可能的设计结构的简化示意图。终端设备包括收发器1601，处理器1602，存储器1603和调制解调处理器1604，收发器1601，处理器1602，存储器1603和调制解调处理器1604通过总线连接。
收发器1601调节(例如，模拟转换、滤波、放大和上变频等)输出采样并生成上行链路信号，该上行链路信号经由天线发射给上述实施例中所述的网络设备。在下行链路上，天线接收上述实施例中基站发射的下行链路信号。收发器160调节(例如，滤波、放大、下变频以及数字化等)从天线接收的信号并提供输入采样。示例性地，在调制解调处理器1604中，编码器1641接收要在上行链路上发送的业务数据和信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码和交织)。调制器1642进一步处理(例如，符号映射和调制)编码后的业务数据和信令消息并提供输出采样。解调器1643处理(例如，解调)该输入采样并提供符号估计。解码器1644处理(例如，解交织和解码)该符号估计并提供发送给终端设备的已解码的数据和信令消息。编码器1641、调制器1642、解调器1643和解码器1644可以由合成的调制解调处理器1604来实现。这些单元根据无线接入网采用的无线接入技术(例如，LTE、5G及其他演进系统的接入技术)来进行处理。在图16所示的实施方式中，收发器1601由发射器和接收器集成。在其他的实施方式中，发射器和接收器也可以相互独立。
处理器1602对终端设备的动作进行控制管理，用于执行上述实施例中由终端设备进行的处理。例如用于控制终端设备根据接收到寻呼指示信息进行处理和/或本申请所描述的技术的其他过程。作为示例，处理器1602用于支持终端设备执行图2～14中涉及终端设备的处理过程。例如，收发器1601用于通过天线搜索及接收网络设备发送的同步信号，处理器1602用于根据同步信号，获取系统信息。在不同的实施方式中，处理器1602可以包括一个或多个处理器，例如包括一个或多个CPU，处理器1602可以集成于芯片中，或者可以为芯片本身。
存储器1603用于存储相关指令及数据，以及终端设备的程序代码和数据。在不同的实施方式中，存储器703包括但不限于是随机存储记忆体(Random Access Memory，RAM)、只读存储器(Read-Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable Read Only Memory，EPROM)、或便携式只读存储器(Compact Disc Read-Only Memory，CD-ROM)。
可以理解的是，图16仅仅示出了所述终端设备的简化设计。在实际应用中，所述终端设备可以包含任意数量的发射器，接收器，处理器，存储器等，而所有可以实现本申请的终端设备都在本申请的保护范围之内。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指 令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。

Claims (10)

  1. 一种非授权频段上同步信号的发送方法，其特征在于，包括：
    网络设备在传输同步信号的起始时刻之前进行先听后说LBT，以判断信道为忙或者空闲；
    当信道为忙时，所述网络设备在所述起始时刻后预定的时长内进行LBT，并在信道空闲时发送所述同步信号；
    当信道为空闲时，所述网络设备在所述起始时刻发送所述同步信号。
  2. 如权利要求1所述的方法，其特征在于，所述同步信号包括L个同步信号块，所述预定的时长为至少一个用于传输所述同步信号块的时长T L，L为大于或者等于2的整数。
  3. 如权利要求2所述的方法，其特征在于，所述网络设备在所述起始时刻后预定的时长内进行LBT，并在信道空闲时发送所述同步信号包括：
    所述网络设备在所述起始时刻T0之后N个T S内进行LBT，所述T S为用于传输1个同步信号块的时长，当信道空闲时，所述网络设备在时刻T0+N×T L发送l个同步信号块，所述N为大于或者等于1的整数，所述l小于或者等于所述L，所述l为大于或者等于1的整数。
  4. 如权利要求1所述的方法，其特征在于，所述预定的时长为至少一个正交频分复用OFDM符号所占用的时长T OFDM，所述网络设备在所述起始时刻后预定的时长内进行LBT，并在信道空闲时发送所述同步信号包括：
    所述网络设备在所述起始时刻之后M个T OFDM内进行LBT，当信道空闲时，所述网络设备在时刻T0+M×T OFDM发送所述同步信号，所述M为大于或者等于1的整数。
  5. 一种非授权频段上同步信号的接收方法，其特征在于，包括：
    终端设备搜索并接收同步信号，所述同步信号包括连续的L个同步信号块，所述L为大于或者等于2的整数；
    终端设备根据搜索到的所述同步信号获取所述网络设备对应的系统信息。
  6. 一种网络设备，其特征在于，包括处理器和收发器，其中，
    所述处理器，用于控制所述收发器在传输同步信号的起始时刻之前进行先听后说LBT，以判断信道为忙或者空闲；
    当信道为忙时，所述收发器在所述起始时刻后预定的时长内进行LBT，并在信道空闲时发送所述同步信号；
    当信道为空闲时，所述收发器在所述起始时刻发送所述同步信号。
  7. 如权利要求6所述的网络设备，其特征在于，所述同步信号包括L个同步信号块，所述预定的时长为至少一个用于传输所述同步信号块的时长T L，L为大于或者等 于2的整数。
  8. 如权利要求7所述的网络设备，其特征在于，所述收发器用于在所述起始时刻T0之后N个T S内进行LBT，所述T S为用于传输1个SSB的时长，当信道空闲时，所述网络设备在时刻T0+N×T L发送l个同步信号块，所述N为大于或者等于1的整数，所述l小于或者等于所述L，所述l为大于或者等于1的整数。
  9. 如权利要求6所述的网络设备，其特征在于，所述预定的时长为至少一个正交频分复用OFDM符号所占用的时长T OFDM，所述收发器用于在所述起始时刻之后M个T OFDM内进行LBT，当信道空闲时，所述网络设备在时刻T0+M×T OFDM发送所述同步信号，所述M为大于或者等于1的整数。
  10. 一种终端设备，其特征在于，包括：
    收发器，用于搜索并接收同步信号，所述同步信号包括连续的L个同步信号块，所述L为大于或者等于2的整数；
    处理器，用于根据搜索到的所述同步信号获取所述网络设备对应的系统信息。
PCT/CN2018/110602 2017-11-17 2018-10-17 一种非授权频段上同步信号的发送方法、网络设备及终端设备 WO2019095916A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18879530.6A EP3703460A4 (en) 2017-11-17 2018-10-17 METHOD OF SENDING A SYNCHRONIZATION SIGNAL APPLIED TO A LICENSE FREE FREQUENCY BAND, NETWORK DEVICE AND TERMINAL DEVICE
US16/875,132 US11570731B2 (en) 2017-11-17 2020-05-15 Method for sending synchronization signal in unlicensed frequency band, network device, and terminal device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711147671.0 2017-11-17
CN201711147671.0A CN109803442B (zh) 2017-11-17 2017-11-17 一种同步信号的发送方法、网络设备及终端设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/875,132 Continuation US11570731B2 (en) 2017-11-17 2020-05-15 Method for sending synchronization signal in unlicensed frequency band, network device, and terminal device

Publications (1)

Publication Number Publication Date
WO2019095916A1 true WO2019095916A1 (zh) 2019-05-23

Family

ID=66540009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/110602 WO2019095916A1 (zh) 2017-11-17 2018-10-17 一种非授权频段上同步信号的发送方法、网络设备及终端设备

Country Status (4)

Country Link
US (1) US11570731B2 (zh)
EP (1) EP3703460A4 (zh)
CN (1) CN109803442B (zh)
WO (1) WO2019095916A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3735054A4 (en) * 2017-12-29 2021-04-07 Guangdong Oppo Mobile Telecommunications Corp., Ltd. WIRELESS COMMUNICATION METHOD, NETWORK DEVICE AND TERMINAL DEVICE
CN111988809A (zh) * 2019-05-22 2020-11-24 索尼公司 用于无线通信的电子设备和方法、计算机可读存储介质
CN112235874B (zh) * 2020-10-20 2022-06-10 Tcl通讯（宁波）有限公司 减少前端无线传输时间方法、系统、存储介质及移动终端

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105634859A (zh) * 2015-07-31 2016-06-01 宇龙计算机通信科技(深圳)有限公司 基于负载的lbt信道检测方法及系统、基站和终端
CN106559795A (zh) * 2015-09-25 2017-04-05 中兴通讯股份有限公司 一种确定lbt模式的方法、装置和实现lbt模式切换的方法
CN107113886A (zh) * 2014-11-07 2017-08-29 瑞典爱立信有限公司 用于以选择的先听后说（lbt）方法执行lbt的第一无线电节点和其中的方法
CN107231643A (zh) * 2016-03-24 2017-10-03 北京信威通信技术股份有限公司 基于laa网络的上行数据传输方法及装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2016121917A1 (ja) * 2015-01-29 2017-12-07 株式会社Ｎｔｔドコモ 無線基地局、ユーザ端末及び無線通信方法
WO2017027059A1 (en) 2015-08-13 2017-02-16 Intel IP Corporation Prach design for unlicensed channels
US10334546B2 (en) 2015-08-31 2019-06-25 Qualcomm Incorporated Synchronization signaling coordination for co-existence on a shared communication medium
US10492225B2 (en) * 2015-11-05 2019-11-26 Intel IP Corporation Listen before talk for discovery reference signal transmission in unlicensed spectrum
US10687288B2 (en) 2016-02-02 2020-06-16 Qualcomm Incorporated Synchronization across transmitting nodes using shared radio frequency spectrum
US10541772B2 (en) * 2017-04-28 2020-01-21 Qualcomm Incorporated Techniques for transmission of discovery reference signals in new radio shared spectrum
US10541851B2 (en) * 2017-05-25 2020-01-21 Qualcomm Incorporated Synchronization signal block signaling for wireless communications in shared spectrum
WO2019032641A1 (en) * 2017-08-10 2019-02-14 Convida Wireless, Llc PBCH SYNCHRONIZATION AND POLAR CODE DESIGN ASPECTS INVOLVING FIRST INTERFERENCE OF USEFUL DATA AND SECOND INTERFERENCE OF CODED DATA
US11284362B2 (en) * 2017-10-02 2022-03-22 Apple Inc. Synchronization signal block for unlicensed carrier, and listen before talk strategies for initial access

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107113886A (zh) * 2014-11-07 2017-08-29 瑞典爱立信有限公司 用于以选择的先听后说（lbt）方法执行lbt的第一无线电节点和其中的方法
CN105634859A (zh) * 2015-07-31 2016-06-01 宇龙计算机通信科技(深圳)有限公司 基于负载的lbt信道检测方法及系统、基站和终端
CN106559795A (zh) * 2015-09-25 2017-04-05 中兴通讯股份有限公司 一种确定lbt模式的方法、装置和实现lbt模式切换的方法
CN107231643A (zh) * 2016-03-24 2017-10-03 北京信威通信技术股份有限公司 基于laa网络的上行数据传输方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL.: "NR Standalone Operation on Unlicensed Bands.", 3GPP TSG RAN WGI NR AD HOC MEETING, R1-1711469, 30 June 2017 (2017-06-30), XP051300654 *
See also references of EP3703460A4 *

Also Published As

Publication number Publication date
EP3703460A4 (en) 2020-11-25
CN109803442A (zh) 2019-05-24
EP3703460A1 (en) 2020-09-02
CN109803442B (zh) 2023-02-10
US20200280939A1 (en) 2020-09-03
US11570731B2 (en) 2023-01-31

Similar Documents

Publication Publication Date Title
WO2019154333A1 (zh) 资源选择的方法和终端设备
US9591673B2 (en) Method and apparatus for providing machine initial access procedure for machine to machine communication
US20210068154A1 (en) Channel sensing method, related device, and system
WO2016187954A1 (zh) 一种非授权频段信道占用时间的配置方法及装置
WO2016070704A1 (zh) 一种在非授权频段上的数据传输方法及装置
WO2017024998A1 (zh) 一种数据传输方法及装置
WO2018171681A1 (zh) 一种下行同步信号发送方法和接收方法及设备
JP6783809B2 (ja) デバイス間通信におけるスケジューリング割り当て送信
WO2018188652A1 (zh) 随机接入及响应方法、终端设备、网络设备
WO2016050196A2 (zh) 一种蜂窝通信中的laa传输的基站、ue中的方法和设备
US20210176017A1 (en) HARQ Feedback Method And Apparatus
RU2748223C1 (ru) Способ передачи сигнала, сетевое устройство и терминал
WO2020151754A1 (zh) 一种ra-rnti处理方法和装置
WO2020063630A1 (zh) 一种指示信息的传输方法和装置
WO2019174453A1 (zh) 信息发送的方法和装置
EP3451771B1 (en) Resource determining methods, a terminal, a network-side device and readable storage medium
WO2017197949A1 (zh) 一种数据传输的控制方法及相关设备
WO2019157904A1 (zh) 同步信号块的发送、接收方法及装置
WO2019095916A1 (zh) 一种非授权频段上同步信号的发送方法、网络设备及终端设备
WO2019201222A1 (zh) 一种数据信道传输方法、接收方法及装置
WO2019051802A1 (zh) 传输数据的方法、网络设备和终端设备
US11991707B2 (en) Indication information transmission method and apparatus
WO2019165943A1 (zh) 无线通信方法、无线通信设备和处理器可读存储介质
US20200351942A1 (en) Method and device for managing channel occupancy duration of unlicensed frequency band
WO2022111324A1 (zh) 一种数据处理方法及其设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18879530

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018879530

Country of ref document: EP

Effective date: 20200529