WO2020108199A1 - 接收同步信号的方法与设备 - Google Patents

接收同步信号的方法与设备 Download PDF

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Publication number
WO2020108199A1
WO2020108199A1 PCT/CN2019/113642 CN2019113642W WO2020108199A1 WO 2020108199 A1 WO2020108199 A1 WO 2020108199A1 CN 2019113642 W CN2019113642 W CN 2019113642W WO 2020108199 A1 WO2020108199 A1 WO 2020108199A1
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Prior art keywords
time period
time
synchronization signal
received
terminal device
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PCT/CN2019/113642
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English (en)
French (fr)
Inventor
刘东升
花梦
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华为技术有限公司
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Publication of WO2020108199A1 publication Critical patent/WO2020108199A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70754—Setting of search window, i.e. range of code offsets to be searched
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, and more specifically, to a method and device for receiving synchronization signals.
  • the terminal device In long-term evolution (LTE) systems and future new wireless (NR) systems and other wireless communication systems, the terminal device first needs to perform a network search after it is turned on, so as to reside in the available network found Perform subsequent service processing, for example, perform subsequent data or voice services.
  • LTE long-term evolution
  • NR future new wireless
  • the terminal device After the terminal device is powered on, it performs a priori frequency point search and a non-a priori frequency band search, so as to select a frequency point that requires cell search, and then triggers a cell search process based on the frequency point.
  • the terminal device since the terminal device and the network do not have time domain and frequency domain synchronization information, the terminal device does not know when the network device will send the downlink synchronization signal. Therefore, the terminal device often receives the synchronization signal through blind detection in the search window. During the entire length of the search window, the radio frequency receiving channel of the terminal device is always on, so that the synchronization signal is received. This method of receiving makes The power consumption of the system is large, and the speed of cell search is reduced.
  • the present application provides a method for receiving a synchronization signal, which can reduce the system power consumption caused by cell search and can increase the speed of cell search.
  • a method for receiving a synchronization signal is provided.
  • the method may be executed by the terminal device, or may also be executed by a chip configured in the terminal device, which is not limited in this application.
  • the method includes: determining the position of the second time period in the first time period based on the time when the first synchronization signal is received in the first time period and the starting time of the first time period,
  • the second time period is a time period during which the terminal device does not need to receive a synchronization signal in the first time period, the second time period is after the time when the first synchronization signal is received, the first synchronization signal It is the earliest synchronization signal received in the first time period; during the second time period, the receiving channel is closed and the reception of the synchronization signal is stopped.
  • the terminal device when the terminal device opens the search window (for example, the first time period) to receive the synchronization signal, the terminal device makes the terminal device receive the synchronization signal according to the earliest time in the first time period and the start time of the search window Determine the time period (for example, the second time period) during which the terminal device does not need to receive the synchronization signal within the first time period, and then close the receiving channel and stop receiving the synchronization signal within the second time period, thereby reducing the system power brought by the cell search Consumption, and can increase the speed of cell search.
  • the time period for example, the second time period
  • the second time period is determined in the first time period according to the time when the first synchronization signal is received in the first time period and the start time of the first time period Location, including: when the interval between the moment of receiving the second synchronization signal in the third period of time and the start moment of the first period of time is greater than or equal to 5 milliseconds, determine that the second period of time is A time period between the end time of the third time period and the end time of the first time period, wherein the start time of the third time period is the time when the first synchronization signal is received, so The length of the third time period is greater than or equal to 5 milliseconds, the third time period is located inside the first time period, and the second synchronization signal is the latest received in the third time period Sync signal.
  • the terminal device may determine that the terminal device has received the synchronization signal bearing the synchronization signal within the first time period before the end time of the third time period for a complete half-frame, the terminal device may further determine that the second time period is a time period between the end time of the third time period and the end time of the first time period, and then close the receiving channel within the second time period to stop receiving synchronization Signal, thereby reducing the system power consumption caused by cell search, and can increase the speed of cell search.
  • the third time period for example, the first The interval between the time of the second synchronization signal
  • the terminal device may determine that the terminal device has received the synchronization signal bearing the synchronization signal within the first time period before the end time of the third time period
  • the terminal device may further determine that the second time period is a time period between the end time of the third time period and the end time of the first time period, and then close the receiving channel within the second time period to stop receiving synchronization Signal, thereby reducing the system power consumption caused by cell search, and can increase the
  • the second time period is determined in the first time period according to the time when the first synchronization signal is received in the first time period and the start time of the first time period Location, including: when the interval between the moment of the second synchronization signal received in the third period and the starting moment of the first period is less than 5 milliseconds, determine the beginning of the second period The time is the end time of the third time period, and the length of the second time period is less than or equal to 10 milliseconds, wherein the start time of the third time period is the time when the first synchronization signal is received , The length of the third time period is greater than or equal to 5 milliseconds, and the second synchronization signal is a synchronization signal received at the latest within the third time period.
  • the terminal device may determine that the time period between the start time of the first time period and the end time of the third time period does not carry a complete Field, the terminal device may determine that there is no SSB transmission within a time length of less than or equal to 10 ms after the end time of the third time period, that is, the terminal device determines that the start time of the second time period is that of the third time period Termination time, and the length of the second time period is less than or equal to 10ms, and then close the
  • the second time period is determined in the first time period according to the time when the first synchronization signal is received in the first time period and the start time of the first time period Location, including: when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is less than 5 milliseconds, determine whether it is received in the fourth time period Synchronization signal, the start time of the fourth time period is the end time of the third time period, the length of the fourth time period is greater than or equal to 5 milliseconds, and the fourth time period is located at the first time Internal of the segment; when a synchronization signal is received in the fourth period of time, it is determined that the second period of time is the time between the end of the fourth period of time and the end of the first period of time When the synchronization signal is not received in the fourth time period, the start time of the second time period is determined to be the end time of the fourth time period, and the length of the fourth time period is less than Or equal to 5 milliseconds
  • the terminal device may determine that the time period between the start time of the first time period and the end time of the third time period does not carry a complete At this time, the terminal device may continue to receive the SSB within a period of time (for example, the fourth period of time) after the end of the third period of time.
  • the terminal device may determine that the complete half-frame carrying the SSB has been received within the first time period, and the terminal device may determine that the second time period is within the fourth time period During the time period between the end time and the end time of the first time period, the terminal device can close the receiving channel within the second time period and stop receiving SSBs.
  • the terminal device's cell search within the first time period ends, thereby reducing cell search Brings system power consumption, and can improve the speed of cell search.
  • the terminal device may determine that there is no SSB transmission within a time length of less than or equal to 5 ms after the end time of the fourth time period, that is, the terminal device determines the second The start time of the time period is the end time of the fourth time period, and the length of the second time period is less than or equal to 5ms, the terminal device can close the receiving channel within a period of less than or equal to 5ms after the end time of the fourth time period , Stop receiving SSB, then the terminal device can open the receiving channel, continue to receive SSB until the end of the first time period, the terminal device cell search within the first time period ends, thereby reducing the system power consumption caused by the cell search, and Can improve the speed of cell search.
  • an apparatus for receiving a synchronization signal includes various modules or units for performing the method in any possible implementation manner of the first aspect.
  • an apparatus for receiving a synchronization signal may be a terminal device in the above method design, or a chip provided in the terminal device.
  • the device for receiving a synchronization signal includes: a processor, coupled with a memory, and capable of executing instructions in the memory to implement the method in any one of the possible implementation manners of the first aspect described above.
  • the device for receiving the synchronization signal further includes a memory.
  • the device for receiving a synchronization signal further includes a communication interface, and the processor is coupled to the communication interface.
  • the device that receives the synchronization signal is a terminal device.
  • the communication interface may be a transceiver or an input/output interface.
  • the device that receives the synchronization signal is a chip configured in the terminal device.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a computer program product includes: a computer program (also referred to as code or instructions) that, when the computer program is executed, causes the computer to perform any of the first aspect A possible implementation method.
  • a computer-readable medium that stores a computer program (also referred to as code or instructions) that when executed on a computer, causes the computer to perform any of the first aspect A possible implementation method.
  • a computer program also referred to as code or instructions
  • a communication system including the foregoing terminal device.
  • FIG. 1 is a schematic diagram of a communication system applicable to an embodiment of the present application.
  • FIG. 2 is a time domain transmission pattern of SSB applicable to the embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a method for receiving a synchronization signal provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the on/off state of the receiving channel in the first time period according to an embodiment of the present application.
  • FIG. 5 is another schematic diagram of the on/off state of the receiving channel in the first time period according to an embodiment of the present application.
  • FIG 6 is still another schematic diagram of the on/off state of the receiving channel in the first time period according to the embodiment of the present application.
  • FIG. 7 is a schematic block diagram of an apparatus for receiving synchronization signals according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an apparatus for receiving synchronization signals according to an embodiment of the present application.
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • general packet radio service general packet radio service, GPRS
  • LTE long term evolution
  • LTE frequency division duplex FDD
  • TDD time division duplex
  • UMTS universal mobile communication system
  • WiMAX worldwide interoperability for microwave access
  • the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application.
  • the wireless communication system 100 may include at least one network device, such as the network device 111 shown in FIG. 1, and the wireless communication system 100 may also include at least one terminal device, such as the terminal device 121 shown in FIG. To the terminal device 123. Both the network device and the terminal device can be configured with multiple antennas, and the network device and the terminal device can communicate using multi-antenna technology.
  • a network device can manage one or more cells, and there can be an integer number of terminal devices in a cell.
  • the network device 111 and the terminal device 121 to the terminal device 123 form a single-cell communication system, and without loss of generality, the cell is recorded as cell #1.
  • the network device 111 may serve the terminal device (for example, the terminal device 121) in the cell #1.
  • a cell can be understood as a serving cell of a network device, that is, an area within the coverage area of the wireless network of the network device.
  • FIG. 1 is only for ease of understanding, and the network device 111 and the terminal device 121 to the terminal device 123 are schematically shown, but this should not constitute any limitation to this application, and the wireless communication system may include more
  • the network device may also include more or less number of terminal devices.
  • the same network device can communicate with different terminal devices, or different network devices can communicate with different terminal devices. This application does not limit this .
  • the network device in the communication system may be any device with wireless transceiver function.
  • the network equipment includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC) ), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless fidelity (WiFi) system Access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or sending and receiving point (transmission and reception point, TRP), etc.
  • 5G such as, NR, gNB in the system, or transmission point (TRP or TP), one or a group (including multiple antenna panels) of the base station in the 5G system, or it can also be a network node that constitutes a gNB or transmission point
  • gNB may include a centralized unit (CU) and DU.
  • the gNB may also include a radio unit (RU).
  • the CU implements some functions of gNB, and the DU implements some functions of gNB.
  • CU implements radio resource control (RRC), packet data convergence layer protocol (PDCP) layer functions
  • DU implements radio link control (RLC) and media access control. (media access control, MAC) and physical (physical, PHY) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence layer protocol
  • RLC radio link control
  • MAC media access control
  • physical physical (physical, PHY) layer functions.
  • the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network devices in the radio access network (RAN), and can also be divided into network devices in the core network (CN), which is not limited in this application.
  • RAN radio access network
  • CN core network
  • terminal equipment in the wireless communication system may also be referred to as user equipment (user equipment (UE), access terminal, subscriber unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, User terminal, terminal, wireless communication device, user agent or user device.
  • user equipment user equipment
  • access terminal subscriber unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile device User terminal
  • terminal wireless communication device
  • user agent user device
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal
  • Wireless terminals in equipment industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical (remote medical), wireless terminals in smart grid (smart grid), transportation safety ( Wireless terminals in transportation, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of the present application do not limit the application scenarios.
  • FIG. 1 is only a simplified schematic diagram for ease of understanding and examples.
  • the communication system 100 may also include other network devices or other terminal devices, which are not shown in FIG. 1.
  • first, second, third, fourth, and various numerical numbers in the embodiments shown below are only for the convenience of description, and are not intended to limit the scope of the embodiments of the present application. For example, distinguish between different synchronization signals.
  • the "protocol” involved in the embodiments of the present application may refer to standard protocols in the communication field, and may include, for example, the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which are not limited in this application.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the relationship of the related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related object is a “or” relationship.
  • “At least one of the following” or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items.
  • At least one of a, b, and c can represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a , B and c.
  • a, b, and c may be single or multiple, respectively.
  • synchronization signal blocks In wireless communication systems such as the LTE system and the future NR system, synchronization signal blocks (synchronization signal block (SSB)) are usually carried in a time domain resource with a length of 5 ms and are sent in cycles. Among them, the length of the SSB is The time domain resource of 5 ms is called a half frame, which usually includes multiple SSBs.
  • SSB synchronization signal block
  • each SSB includes a primary synchronization signal (primary synchronization signal, PSS), secondary synchronization signal (secondary synchronization signal, SSS) and physical broadcast channel (Physical Broadcast Channel, PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH Physical Broadcast Channel
  • the terminal device Since the network device uses time-division multiple resources carrying SSB to cover different spatial directions of the cell, the terminal device usually needs to receive at least one complete half-frame to complete the cell search when performing the cell search. However, since there is no time domain and frequency domain synchronization information between the terminal device and the network device when the cell search process is started, the terminal device does not know when the network device sends the downlink synchronization signal. Normally, terminal devices often receive synchronization signals through blind detection in the search window. In order to receive a complete field in the search window, the radio frequency receiving channel of the terminal device is always on during the entire search window. Status, so as to receive the synchronization signal, this receiving method makes the power consumption of the system larger, and reduces the speed of cell search.
  • the present application provides a method of receiving a synchronization signal, with a view to reducing the system power consumption brought by cell search, and can increase the speed of cell search.
  • FIG. 3 is a schematic flowchart of a method 200 for receiving a synchronization signal according to an embodiment of the present application. As shown, the method 200 may include steps 210 to 220. The steps of the method 200 are described in detail below.
  • the network device shown below may correspond to, for example, the network device 111 in FIG. 1, and the terminal device may correspond to any one of the terminal device 121, the terminal device 122, and the terminal device 123 in FIG. 1, for example.
  • step 210 the position of the second time period in the first time period is determined according to the time when the first synchronization signal is received in the first time period and the starting time of the first time period, the second The time period is a time period during which the terminal device in the first time period does not need to receive a synchronization signal, and the second time period is after the time when the first synchronization signal is received, the first synchronization signal is in The synchronization signal received earliest in the first time period.
  • step 220 the radio frequency receiving channel is closed within the second time period, and the receiving of the synchronization signal is stopped.
  • the terminal device may open a search window with a time length of 20 ms (for example, the first time period), and record the start time of the search window (for example, the first The beginning of a time period).
  • a search window with a time length of 20 ms (for example, the first time period)
  • the start time of the search window for example, the first The beginning of a time period
  • the terminal device can open the receiving channel (for example, radio frequency receiving channel) to receive the SSB in the search window with a length of 20ms.
  • the terminal device determines whether the SSB is received, the terminal device can calculate the relevant value of the received PSS.
  • the terminal device may consider that the SSB has been received.
  • the terminal device can calculate the correlation value of the received PSS while receiving the PSS.
  • the correlation value threshold may be preset, or may be the network device through radio resource control (radio resource control (RRC) signaling, media access control (MAC) signaling and physical layer signaling At least one kind of signaling is notified to the terminal equipment.
  • RRC radio resource control
  • MAC media access control
  • the terminal device When the terminal device receives the SSB earliest within the first time period, the terminal device can record the time of the earliest received SSB (for example, the first synchronization signal), and the terminal device can receive the SSB earliest within the first time period And the start time of the first time period determine the position of the time period (eg, the second time period) in which the SSB is not transmitted in the first time period in the first time period.
  • the terminal device can record the time of the earliest received SSB (for example, the first synchronization signal), and the terminal device can receive the SSB earliest within the first time period
  • the start time of the first time period determine the position of the time period (eg, the second time period) in which the SSB is not transmitted in the first time period in the first time period.
  • the terminal device may close the receiving channel within the second time period and stop receiving the SSB.
  • the method for the terminal device to determine the position of the second time period within the second time period is described in detail below.
  • determining the position of the second time period in the first time period based on the time when the first synchronization signal is received in the first time period and the starting time of the first time period includes:
  • the second time period is the third A time period between the end time of the time period and the end time of the first time period
  • the start time of the third time period is the time when the first synchronization signal is received, the length of the third time period is greater than or equal to 5 milliseconds, and the third time period is located at the first time Inside the segment, the second synchronization signal is a synchronization signal received at the latest within the third time period.
  • the terminal device when the terminal device receives the SSB the earliest within the first time period, it will record the time when the SSB was received the earliest and continue to respond to the SSB for a period of time (for example, the third time period) starting from this time Receive and record the SSB time received in the third time period, the terminal device can be based on the time of the last SSB received in the third time period (for example, the second synchronization signal) and the first time period The difference between the starting moments of, determines the position of the second time period within the first time period.
  • the length of the third time period may be greater than or equal to 5ms.
  • the terminal device may start a timer (for example, T 0 timer) when the SSB is received at the earliest, the duration of the T 0 timer may be a third time period (for example, the timer duration is 5.1 ms), and the terminal device The time of the SSB received before the T 0 timer expires is recorded, and the terminal device can calculate the difference between the time of the last SSB received during the T 0 timer and the start time of the first time period Value to determine the position of the second time period within the first time period.
  • T 0 timer for example, T 0 timer
  • the duration of the T 0 timer may be a third time period (for example, the timer duration is 5.1 ms)
  • the terminal device The time of the SSB received before the T 0 timer expires is recorded, and the terminal device can calculate the difference between the time of the last SSB received during the T 0 timer and the start time of the first time period Value to determine the position of the second time
  • the terminal device may determine that the field carrying the SSB is located at the first Between the start time of the time period and the time-out time of the T 0 timer. That is, the terminal device may determine that the terminal device has received the complete half-frame carrying the SSB within the first time period before the T 0 timer expires.
  • the terminal device may determine that the second time period is the T 0 timer During the time period between the timeout time of the first time period and the end time of the first time period, the terminal device may close the receiving channel and stop receiving the SSB within the second time period, and the cell search of the terminal device within the first time period ends.
  • FIG. 4 shows the on/off state of the receiving channel during the first time period.
  • determining the position of the second time period in the first time period based on the time when the first synchronization signal is received in the first time period and the start time of the first time period includes:
  • the start time of the second time period is the The ending moment of the third time period, and the length of the second time period is less than or equal to 10 milliseconds
  • the starting time of the third time period is the time when the first synchronization signal is received, the length of the third time period is greater than or equal to 5 milliseconds, and the second synchronization signal is at the third A synchronization signal received at the latest within the time period.
  • the terminal device when the terminal device receives the SSB the earliest within the first time period, it will record the time when the SSB was received the earliest and continue to respond to the SSB for a period of time (for example, the third time period) starting from this time Receive and record the SSB time received in the third time period, the terminal device can be based on the time of the last SSB received in the third time period (for example, the second synchronization signal) and the first time period The difference between the starting moments of, determines the position of the second time period within the first time period.
  • the length of the third time period may be greater than or equal to 5ms.
  • the terminal device may start a timer (e.g., timer T 0) upon receiving the first SSB, equal to the length of the third period duration T 0 of the timer (e.g., the duration of 5ms timer T 0) ,
  • the terminal device will record the time of the SSB received before the T 0 timer expires, the terminal device may according to the time of the latest one SSB received during the T 0 timer timing and the start time of the first time period The difference between them determines the position of the second time period within the first time period.
  • the terminal device can determine the start time of the first time period to T 0
  • the time period between the timer's timeout moments does not carry a complete field.
  • the terminal device may determine that there is no SSB transmission within a time length of less than or equal to 10 ms after the T 0 timer expires, that is, the terminal device
  • the starting time of the time period is the timeout time of the T 0 timer
  • the length of the second time period is less than or equal to 10 ms.
  • the terminal device can close the receiving channel within the second time period and stop receiving SSB.
  • the cell search in the segment ends.
  • FIG. 5 shows another on/off state of the receiving channel during the first time period.
  • the terminal device may start a timer again times out at time T 0 of the timer (e.g., T 1 Timer), the duration of the T 1 timer can be less than or equal to 10 ms.
  • T 1 Timer the terminal device closes the receiving channel and stops receiving SSB.
  • the terminal device can open the receiving channel and continue receiving.
  • SSB Until the end of the first time period, the cell search of the terminal device within the first time period ends.
  • the above method 1 and method 2 can be applied to the case where the terminal device explicitly carries the repetition period of the half frame of the SSB.
  • this application provides the following method for receiving the synchronization signal for this situation, which is applicable to the terminal device that does not explicitly carry the SSB In the case of a half-frame repetition period, and this method can reduce the system power consumption caused by cell search and improve the cell search for the case where the repetition period of the half-frame carrying SSB is 5ms, 10ms, and 20ms speed.
  • determining the position of the second time period in the first time period based on the time when the first synchronization signal is received in the first time period and the starting time of the first time period includes:
  • the start time of the fourth time period is the end time of the third time period, the length of the fourth time period is greater than or equal to 5 milliseconds, and the fourth time period is located inside the first time period;
  • the second time period is a time period between the end time of the fourth time period and the end time of the first time period
  • the fourth time period is located inside the first time period.
  • the terminal device when the terminal device receives the SSB the earliest within the first time period, it will record the time when the SSB was received the earliest and continue to respond to the SSB for a period of time (for example, the third time period) starting from this time Receive and record the SSB time received in the third time period, the terminal device can be based on the time of the last SSB received in the third time period (for example, the second synchronization signal) and the first time period The difference between the starting moments of, determines the position of the second time period within the first time period.
  • the length of the third time period may be greater than or equal to 5ms.
  • the terminal device may start a timer (e.g., timer T 0) upon receiving the first SSB, equal to the length of the third period duration T 0 of the timer (e.g., the duration of 5ms timer T 0) ,
  • the terminal device will record the time of the SSB received before the T 0 timer expires, the terminal device may according to the time of the latest one SSB received during the T 0 timer timing and the start time of the first time period The difference between them determines the position of the second time period within the first time period.
  • the terminal device may determine that the field carrying the SSB is located at the first Between the start time of the time period and the time-out time of the T 0 timer.
  • the terminal device may determine T 0 before the timer expires, the terminal device has received the first period of time to complete the half-frames carrying SSB, in which case, the terminal device may determine a second timer period is T 0 During the time period between the timeout time of the first time period and the end time of the first time period, the terminal device may close the receiving channel and stop receiving the SSB within the second time period, and the cell search of the terminal device within the first time period ends.
  • the terminal device can determine the start time of the first time period to T 0
  • the time period between the timer's timeout moments does not carry a complete field.
  • the terminal device may continue to receive the SSB for a period of time (for example, the fourth period of time) after the timeout time of the T 0 timer.
  • the terminal device may determine that the complete half-frame carrying the SSB has been received within the first time period, and the terminal device may determine that the second time period is within the fourth time period In the time period between the termination time and the termination time in the first time period, the terminal device may close the receiving channel in the second time period and stop receiving the SSB, and the cell search of the terminal device in the first time period ends.
  • the terminal device may start a timeout timer time T 0 again timer (timer T 2), of equal length and the fourth period duration T 2 of the timer, the duration of the timer T 2 may be 5ms. If the terminal device receives the SSB during the T 2 timer, the terminal device may determine that the complete half-frame carrying the SSB has been received within the first time period, and the terminal device may determine that the second time period is the T 2 timer During the time period between the timeout time of the first time period and the end time of the first time period, the terminal device may close the receiving channel and stop receiving the SSB within the second time period, and the cell search of the terminal device within the first time period ends.
  • timer T 2 again timer
  • the duration of the timer T 2 may be 5ms.
  • the terminal device may determine that there is no SSB transmission within a time length of less than or equal to 5 ms after the T 2 timer expires, that is, the terminal device determines the second
  • the start time of the time period is the time-out time of the T 2 timer, and the length of the second time period is less than or equal to 5 ms.
  • the terminal device can start the timer again at the time-out time of the T 2 timer (for example, T 3 timer)
  • the duration of the T 3 timer can be less than or equal to 5 ms.
  • the terminal device closes the receiving channel and stops receiving SSB.
  • the terminal device can open the receiving channel and continue to receive SSB until the first At the end of a time period, the cell search of the terminal device within the first time period ends.
  • FIG. 6 shows another on/off state of the receiving channel during the first time period.
  • the second time period is a time period during which the terminal device in the first time period does not need to receive the synchronization signal.
  • the second time period may carry the synchronization signal, or may not carry the synchronization signal. This is not particularly limited. No matter whether the terminal device carries the synchronization signal in the second time period, in the embodiment of the present application, the terminal device will not receive the synchronization signal in the second time period.
  • FIG. 7 shows a schematic block diagram of an apparatus 300 for receiving synchronization signals according to an embodiment of the present application.
  • the apparatus 300 is used to execute the method executed by the terminal device in the foregoing method embodiment.
  • the specific form of the apparatus 300 may be a chip in a terminal device. This embodiment of the present application does not limit this.
  • the device 300 includes:
  • the processing module 301 is configured to determine the position of the second time period in the first time period based on the time when the first synchronization signal is received in the first time period and the start time of the first time period.
  • the second time period is a time period during which the terminal device in the first time period does not need to receive a synchronization signal.
  • the second time period is after the moment when the first synchronization signal is received.
  • the first synchronization signal is The synchronization signal received earliest in the first time period.
  • the processing module 301 is further configured to close the receiving channel and stop receiving the synchronization signal within the second time period.
  • the transceiver module 302 is configured to receive multiple synchronization signals including the first synchronization signal.
  • the processing module 301 is further configured to: when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is greater than or equal to 5 milliseconds Determining that the second time period is a time period between the end time of the third time period and the end time of the first time period,
  • the start time of the third time period is the time when the first synchronization signal is received, the length of the third time period is greater than or equal to 5 milliseconds, and the third time period is located at the first time Inside the segment, the second synchronization signal is a synchronization signal received at the latest within the third time period.
  • the processing module 301 is further configured to determine when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is less than 5 milliseconds
  • the start time of the second time period is the end time of the third time period, and the length of the second time period is less than or equal to 10 milliseconds
  • the starting time of the third time period is the time when the first synchronization signal is received, the length of the third time period is greater than or equal to 5 milliseconds, and the second synchronization signal is at the third A synchronization signal received at the latest within the time period.
  • the processing module 301 is further configured to determine when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is less than 5 milliseconds Whether a synchronization signal is received in the fourth time period, the start time of the fourth time period is the end time of the third time period, the length of the fourth time period is greater than or equal to 5 milliseconds, the first The four time periods are located inside the first time period;
  • the second time period is a time period between the end time of the fourth time period and the end time of the first time period
  • the fourth time period is located inside the first time period.
  • the apparatus 300 for receiving a synchronization signal may correspond to the terminal device in the embodiment of the method 200 according to the embodiment of the present application, and the apparatus 300 may include the method for performing the method 200 in FIG. 3.
  • a module of a method executed by a terminal device A module of a method executed by a terminal device.
  • the above and other operations and/or functions of each module in the apparatus 300 are to implement the corresponding steps performed by the terminal device in the embodiment of the method 200 in FIG. 3, so the beneficial effects in the foregoing method embodiments can also be achieved It’s concise, so I won’t go into details here.
  • each module in the device 300 may be implemented in the form of software and/or hardware, which is not specifically limited.
  • the device 300 is presented in the form of functional modules.
  • the “module” here may refer to an application-specific integrated circuit ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • ASIC application-specific integrated circuit
  • the processing module 301 can be implemented by the processor 401 and the memory 402 shown in FIG. 8.
  • the transceiver module 302 can be implemented by the transceiver 403 shown in FIG. 8.
  • the processor is implemented by executing the computer program stored in the memory.
  • the function and/or implementation process of the transceiver module 302 may also be implemented through pins or circuits.
  • the memory is a storage unit within the chip, such as a register, a cache, etc.
  • the storage unit may also be a storage unit located outside the chip within the computer device, as shown in FIG. 8 Memory 402.
  • FIG. 8 shows a schematic structural diagram of an apparatus 400 for receiving synchronization signals according to an embodiment of the present application.
  • the device 400 includes: a processor 401.
  • the processor 401 is configured to determine that the second time period is based on the time when the first synchronization signal is received in the first time period and the start time of the first time period A position in a first time period, the second time period is a time period during which the terminal device in the first time period does not need to receive a synchronization signal, and the second time period is located when the first synchronization signal is received After the time, the first synchronization signal is the earliest synchronization signal received in the first time period.
  • the processor 401 is further configured to close the receiving channel and stop receiving the synchronization signal within the second time period.
  • the processor 401 is also used to call an interface to perform the following actions: receive multiple synchronization signals including the first synchronization signal.
  • the processor 401 is further configured to: when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is greater than or equal to 5 milliseconds Determining that the second time period is a time period between the end time of the third time period and the end time of the first time period,
  • the start time of the third time period is the time when the first synchronization signal is received, the length of the third time period is greater than or equal to 5 milliseconds, and the third time period is located at the first time Inside the segment, the second synchronization signal is a synchronization signal received at the latest within the third time period.
  • the processor 401 is further configured to determine when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is less than 5 milliseconds
  • the start time of the second time period is the end time of the third time period, and the length of the second time period is less than or equal to 10 milliseconds
  • the starting time of the third time period is the time when the first synchronization signal is received, the length of the third time period is greater than or equal to 5 milliseconds, and the second synchronization signal is at the third A synchronization signal received at the latest within the time period.
  • the processor 401 is further configured to determine when the interval between the time of the second synchronization signal received in the third time period and the start time of the first time period is less than 5 milliseconds Whether a synchronization signal is received in the fourth time period, the start time of the fourth time period is the end time of the third time period, the length of the fourth time period is greater than or equal to 5 milliseconds, the first The four time periods are located inside the first time period;
  • the second time period is a time period between the end time of the fourth time period and the end time of the first time period
  • the fourth time period is located inside the first time period.
  • the processor 401 may call an interface to perform the foregoing sending action, where the called interface may be a logical interface or a physical interface, which is not limited in this embodiment of the present application.
  • the physical interface may be implemented by a transceiver.
  • the device 400 may further include a transceiver 403.
  • the device 400 further includes a memory 402, and the memory 402 may store the program code in the foregoing method embodiment, so that the processor 401 can call it.
  • the device 400 includes a processor 401, a memory 402, and a transceiver 403, the processor 401, the memory 402, and the transceiver 403 communicate with each other through an internal connection channel to transfer control and/or data signals.
  • the processor 401, the memory 402, and the transceiver 403 may be implemented by a chip, and the processor 401, the memory 402, and the transceiver 403 may be implemented on the same chip, or may be implemented on different chips, respectively. Or any two of them can be combined in one chip.
  • the memory 402 may store program codes, and the processor 401 calls the program codes stored in the memory 402 to implement the corresponding functions of the device 400.
  • apparatus 400 may also be used to perform other steps and/or operations on the terminal device side in the foregoing embodiments, and for brevity, details are not described here.
  • processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or a field programmable gate array (FPGA) Or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, can also be a system chip (system on chip, SoC), can also be a central processor (central processor (unit), CPU, or network processing Network (processor), can also be a digital signal processing circuit (digital signal processor, DSP), can also be a microcontroller (microcontroller unit, MCU), can also be a programmable controller (programmable logic (device, PLD) ) Or other integrated chips.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory mentioned in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (random access memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous RAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • double data SDRAM double data SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM synchronous connection dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • 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, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供一种接收同步信号的方法，包括：根据在第一时间段内接收到第一同步信号的时刻与第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，第二时间段为第一时间段中的终端设备无需接收同步信号的时间段，第二时间段位于接收到第一同步信号的时刻之后，第一同步信号为在第一时间段内最早接收到的同步信号；在第二时间段内关闭接收通道，停止接收同步信号，该方法能够降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。

Description

接收同步信号的方法与设备
本申请要求于2018年11月30日提交中国专利局、申请号为201811453767.4、申请名称为“接收同步信号的方法与设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种接收同步信号的方法与设备。
背景技术
在长期演进(long term evolution，LTE)系统以及未来的新无线(new radio，NR)系统等无线通信系统中，终端设备开机后首先需要进行网络搜索，以便于驻留在搜索到的可用网络中进行后续的业务处理，例如，进行后续的数据或语音业务。
终端设备开机后进行先验频点搜索和非先验频段搜索，从而选择需要进行小区搜索的频点，然后，基于该频点触发小区搜索流程。在小区搜索过程启动时，由于终端设备与网络端无时域和频域同步信息，终端设备并不清楚网络设备会在什么时刻发送下行同步信号。因此，终端设备往往在搜索窗内通过盲检测的方式接收同步信号，在整个搜索窗的时间长度内，终端设备的射频接收通道始终处于开启状态，从而对同步信号进行接收，这种接收方法使得系统的功耗较大，并且降低了小区搜索的速度。
发明内容
本申请提供一种接收同步信号的方法，能够降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
第一方面，提供了一种接收同步信号的方法。该方法可以由终端设备执行，或者也可以由配置于终端设备中的芯片执行，本申请对此不作限定。
具体地，该方法包括：根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，所述第二时间段为所述第一时间段中的所述终端设备无需接收同步信号的时间段，所述第二时间段位于接收到所述第一同步信号的时刻之后，所述第一同步信号为在所述第一时间段内最早接收到的同步信号；在所述第二时间段内关闭接收通道，停止接收同步信号。
基于上述技术方案，终端设备在开启搜索窗(例如，第一时间段)接收同步信号时，通过使终端设备根据在第一时间段内最早接收到同步信号的时刻与搜索窗的起始时刻，在第一时间段内确定终端设备无需接收同步信号的时间段(例如，第二时间段)，进而在第二时间段内关闭接收通道，停止接收同步信号，从而降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
在一种可能的实现方式中，所述根据在第一时间段内接收到第一同步信号的时刻与所 述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔大于或等于5毫秒时，确定所述第二时间段是所述第三时间段的终止时刻与所述第一时间段的终止时刻之间的时间段，其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第三时间段位于所述第一时间段的内部，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
基于上述技术方案，通过根据将在第一时间段内最早接收到同步信号的时刻确定为第三时间段的起始时刻，根据第三时间段内最晚接收到的一个同步信号(例如，第二同步信号)的时刻与第一时间段的起始时刻之间的间隔，确定第二时间段在第一时间段中的位置，当第三时间段内最晚接收到的一个同步信号的时刻与第一时间段的起始时刻之间的间隔大于或等于5毫秒时，终端设备可以确定在第三时间段的终止时刻之前，终端设备已经在第一时间段内接收到了承载有同步信号的完整的半帧，终端设备进一步可以确定第二时间段是第三时间段的终止时刻与第一时间段的终止时刻之间的时间段，进而在第二时间段内关闭接收通道，停止接收同步信号，从而降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
在一种可能的实现方式中，所述根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定所述第二时间段的起始时刻为所述第三时间段的终止时刻，且所述第二时间段的长度小于或等于10毫秒，其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
基于上述技术方案，通过根据将在第一时间段内最早接收到同步信号的时刻确定为第三时间段的起始时刻，根据第三时间段内最晚接收到的一个同步信号(例如，第二同步信号)的时刻与第一时间段的起始时刻之间的间隔，确定第二时间段在第一时间段中的位置，当第三时间段内最晚接收到的一个同步信号的时刻与第一时间段的起始时刻之间的间隔小于或等于5毫秒时，终端设备可以确定第一时间段的起始时刻至第三时间段的终止时刻之间的时间段并没有承载一个完整的半帧，终端设备可以确定在第三时间段的终止时刻之后的小于或等于10ms的时间长度内没有SSB的传输，即，终端设备确定第二时间段的起始时刻为第三时间段的终止时刻，且第二时间段的长度小于或等于10ms，进而在第二时间段内关闭接收通道，停止接收同步信号，终端设备在第一时间段内的小区搜索结束，终端设备在第一时间段内的小区搜索结束，从而降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
在一种可能的实现方式中，所述根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定在第四时间段内是否接收到同步信号，所述第四时间段的起始时刻为所述第三时间段的终止时刻，所述第四时间段的长度大于或等于5毫秒，所述第四时间段位于所述第一时间段的内部；当在所述第四时间段内接收到同步信号时，确定所述第二时间段是所述 第四时间段的终止时刻与所述第一时间段的终止时刻之间的时间段；当在所述第四时间段内未接收到同步信号时，确定所述第二时间段的起始时刻为所述第四时间段的终止时刻，且所述第四时间段的长度小于或等于5毫秒，所述第四时间段位于所述第一时间段的内部。
基于上述技术方案，通过根据将在第一时间段内最早接收到同步信号的时刻确定为第三时间段的起始时刻，根据第三时间段内最晚接收到的一个同步信号(例如，第二同步信号)的时刻与第一时间段的起始时刻之间的间隔，确定第二时间段在第一时间段中的位置，当第三时间段内最晚接收到的一个同步信号的时刻与第一时间段的起始时刻之间的间隔小于或等于5毫秒时，终端设备可以确定第一时间段的起始时刻至第三时间段的终止时刻之间的时间段并没有承载一个完整的半帧，此时，终端设备可以在第三时间段的终止时刻之后的一段时间(例如，第四时间段)内继续对SSB进行接收。
若终端设备在第四时间段内接收到SSB，则终端设备可以确定已经在第一时间段内接收到承载有SSB的完整的半帧，终端设备可以确定第二时间段是第四时间段的终止时刻与第一时间段的终止时刻之间的时间段，终端设备可以在第二时间段内关闭接收通道，停止接收SSB，终端设备在第一时间段内的小区搜索结束，从而降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
若终端设备在第四时间段内没有接收到SSB，则终端设备可以确定在第四时间段的终止时刻之后的小于或等于5ms的时间长度内没有SSB的传输时，即，终端设备确定第二时间段的起始时刻为第四时间段的终止时刻，且第二时间段的长度小于或等于5ms，终端设备可以在第四时间段的终止时刻之后小于或等于5ms的一段时间内关闭接收通道，停止接收SSB，之后终端设备可以打开接收通道，继续接收SSB直到第一时间段的终止时刻，终端设备在第一时间段内的小区搜索结束，从而降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
第二方面，提供了一种接收同步信号的装置，该接收同步信号的装置包括用于执行第一方面中任一种可能实现方式中的方法的各个模块或单元。
第三方面，提供一种接收同步信号的装置，该接收同步信号的装置可以为上述方法设计中的终端设备，或者，为设置在终端设备中的芯片。该接收同步信号的装置包括：处理器，与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面中任一种可能实现方式中的方法。可选地，该接收同步信号的装置还包括存储器。可选地，该接收同步信号的装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该接收同步信号的装置为终端设备。当该接收同步信号的装置为终端设备时，所述通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该接收同步信号的装置为配置于终端设备中的芯片。当该接收同步信号的装置为配置于终端设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第四方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当所述计算机程序被运行时，使得计算机执行上述第一方面中任一种可能实现方式中的方法。
第五方面，提供了一种计算机可读介质，所述计算机可读介质存储有计算机程序(也 可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面中任一种可能实现方式中的方法。
第六方面，提供了一种通信系统，包括前述的终端设备。
附图说明
图1是适用于本申请实施例的通信系统的示意图。
图2是适用于本申请实施例的SSB的时域发送图样。
图3是本申请实施例提供的接收同步信号的方法的示意性流程图。
图4是根据本申请实施例的接收通道在第一时间段内的开启/关闭状态的示意图。
图5是根据本申请实施例的接收通道在第一时间段内的开启/关闭状态的另一示意图。
图6是根据本申请实施例的接收通道在第一时间段内的开启/关闭状态的再一示意图。
图7是根据本申请实施例的接收同步信号的装置的示意性框图。
图8是根据本申请实施例的接收同步信号的装置的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system for mobile communications，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来的第五代(5th generation，5G)系统或新无线(new radio，NR)等。
为便于理解本申请实施例，首先以图1中示出的通信系统为例详细说明适用于本申请实施例的通信系统。
如1图所示，该无线通信系统100可以包括至少一个网络设备，例如图1所示的网络设备111，该无线通信系统100还可以包括至少一个终端设备，例如图1所示的终端设备121至终端设备123。网络设备和终端设备均可配置多个天线，网络设备与终端设备可使用多天线技术通信。
一个网络设备可以管理一个或多个小区，一个小区中可以有整数个终端设备。可选的，网络设备111和终端设备121至终端设备123组成一个单小区通信系统，不失一般性，将该小区记为小区#1。网络设备111可以为小区#1中的终端设备(例如终端设备121)服务。
需要说明的是，小区可以理解为网络设备的服务小区，也就是网络设备的无线网络的覆盖范围内的区域。
应理解，图1中仅为便于理解，示意性地示出了网络设备111和终端设备121至终端设备123，但这不应对本申请构成任何限定，该无线通信系统中还可以包括更多数量的网 络设备，也可以包括更多或更少数量的终端设备，同一个网络设备可以与不同的终端设备通信，也可以是不同的网络设备与不同的终端设备通信，本申请对此不做限定。
应理解，该通信系统中的网络设备可以是任意一种具有无线收发功能的设备。该网络设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WiFi)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)、媒体接入控制(media access control，MAC)和物理(physical，PHY)层的功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+CU发送的。可以理解的是，网络设备可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
还应理解，该无线通信系统中的终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)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)中的无线终端等等。本申请的实施例对应用场景不做限定。
还应理解，图1仅为便于理解而示例的简化示意图，该通信系统100中还可以包括其他网络设备或者还可以包括其他终端设备，图1中未予以画出。
为了便于理解本申请实施例，作出以下几点说明。
第一，在下文示出的实施例中第一、第二、第三、第四以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的同步信号等。
第二，本申请实施例中涉及的“协议”可以是指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
第三，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b和c中的至少一项(个)，可以表示：a，或，b，或，c，或，a和b，或，a和c，或，b和c，或，a、b和c。其中a、b和c分别可以是单个，也可以是多个。
在LTE系统以及未来的NR系统等无线通信系统中，同步信号块(synchronization signal block，SSB)通常是承载在长度为5ms的时域资源中按照周期发送的，其中，将承载有SSB的长度为5ms的时域资源称为半帧(half frame)，半帧中通常包括多个SSB。
半帧的发送周期通常为20毫秒(ms)、10ms与5ms中的任意一种，图2示出了SSB的时域发送图样，可以看出，每个SSB包括主同步信号(primary synchronization signal,PSS)、辅同步信号(secondary synchronization signal，SSS)以及物理广播信道(Physical Broadcast Channel，PBCH)。
由于网络设备使用时分的承载SSB的多个资源来覆盖小区的各个不同空间方向，终端设备在进行小区搜索时，通常至少需要接收到一个完整的半帧，才能完成小区搜索。但由于在小区搜索过程启动时，终端设备并与网络设备之间并无时域和频域同步信息，因此终端设备并不清楚网络设备在什么时刻发送下行同步信号。通常情况下，终端设备往往在搜索窗内通过盲检测的方式接收同步信号，为了在搜索窗内接收到完整的半帧，在整个搜索窗的时间长度内，终端设备的射频接收通道始终处于开启状态，从而对同步信号进行接收，这种接收方法使得系统的功耗较大，并且降低了小区搜索的速度。
有鉴于此，本申请提供一种接收同步信号的方法，以期降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
下面结合附图详细说明本申请实施例提供的接收同步信号的方法。
图3是本申请实施例提供的接收同步信号的方法200的示意性流程图。如图所示，该方法200可以包括步骤210至步骤220。下面详细说明方法200中的各步骤。
下文中示出的网络设备例如可以对应于图1中的网络设备111，终端设备例如可以对应于图1中的终端设备121、终端设备122与终端设备123中的任意一个。
在步骤210中，根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，所述第二时间段为所述第一时间段中的所述终端设备无需接收同步信号的时间段，所述第二时间段位于接收到所述第一同步信号的时刻之后，所述第一同步信号为在所述第一时间段内最早接收到的同步信号。
在步骤220中，在所述第二时间段内关闭射频接收通道，停止接收同步信号。
具体地，在步骤210中，终端设备接收同步信号(例如，SSB)时，可以开启时间长度为20ms(例如，第一时间段)的搜索窗，并记录搜索窗的起始时刻(例如，第一时间段的起始时刻)。
终端设备可以在长度为20ms的搜索窗内打开接收通道(例如，射频接收通道)接收SSB，终端设备在确定是否接收到SSB时，终端设备可以对接收到的PSS的相关值进行计算，当接收到的PSS的相关值大于过等于相关值阈值时，终端设备则可以认为接收到了 SSB。终端设备可以在接收PSS的同时计算接收到的PSS的相关值。
其中，该相关值阈值可以是预设的，或者可以是网络设备通过无线资源控制(radio resource control，RRC)信令、媒体访问控制(media access control，MAC)信令与物理层信令中的至少一种信令向终端设备通知的。
当中终端设备在第一时间段内最早接收到SSB时，终端设备可以记录下最早接收到的SSB(例如，第一同步信号)的时刻，终端设备可以根据在第一时间段内最早接收到SSB的时刻与第一时间段的起始时刻，确定第一时间段内没有传输SSB的时间段(例如，第二时间段)在第一时间段中的位置。
在步骤220中，终端设备确定了第二时间段在第一时间段内的位置后，可以在第二时间段内关闭接收通道，停止接收SSB。
下面对终端设备确定第二时间段在第二时间段内的位置的方法进行详细说明。
方法1
作为示例而非限定，根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：
当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔大于或等于5毫秒时，确定所述第二时间段是所述第三时间段的终止时刻与所述第一时间段的终止时刻之间的时间段，
其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第三时间段位于所述第一时间段的内部，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
具体地，终端设备在第一时间段内最早接收到SSB时，会记录最早接收到SSB的时刻，并在以该时刻为起始时刻的一段时间内(例如，第三时间段)继续对SSB进行接收，并会记录在第三时间段内接收到的SSB时刻，终端设备可以根据在第三时间段内最晚接收到的一个SSB(例如，第二同步信号)的时刻与第一时间段的起始时刻之间的差值，确定第二时间段在第一时间段内的位置。其中，第三时间段的长度可以大于或等于5ms。
例如，终端设备可以在最早接收到SSB时启动定时器(例如，T 0定时器)，该T 0定时器的时长可以为第三时间段(例如，定时器的时长为5.1ms)，终端设备会对T 0定时器超时前接收到的SSB的时刻进行记录，终端设备可以根据在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值，确定第二时间段在第一时间段内的位置。
当在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值大于或等于5ms时，终端设备可以确定承载有SSB的半帧位于第一时间段的起始时刻与T 0定时器的超时时刻之间。即，终端设备可以确定在T 0定时器超时之前，终端设备已经在第一时间段内接收到了承载有SSB的完整的半帧，此时，终端设备可以确定第二时间段是T 0定时器的超时时刻与第一时间段的终止时刻之间的时间段，终端设备可以在第二时间段内关闭接收通道，停止接收SSB，终端设备在第一时间段内的小区搜索结束。图4示出了接收通道在第一时间段内的开启/关闭状态。
方法2
作为示例而非限定，根据在第一时间段内接收到第一同步信号的时刻与所述第一时间 段的起始时刻，确定第二时间段在第一时间段中的位置，包括：
当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定所述第二时间段的起始时刻为所述第三时间段的终止时刻，且所述第二时间段的长度小于或等于10毫秒，
其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
具体地，终端设备在第一时间段内最早接收到SSB时，会记录最早接收到SSB的时刻，并在以该时刻为起始时刻的一段时间内(例如，第三时间段)继续对SSB进行接收，并会记录在第三时间段内接收到的SSB时刻，终端设备可以根据在第三时间段内最晚接收到的一个SSB(例如，第二同步信号)的时刻与第一时间段的起始时刻之间的差值，确定第二时间段在第一时间段内的位置。其中，第三时间段的长度可以大于或等于5ms。
例如，终端设备可以在最早接收到SSB时启动定时器(例如，T 0定时器)，该T 0定时器的时长与第三时间段的长度相等(例如，T 0定时器的时长为5ms)，终端设备会对T 0定时器超时前接收到的SSB的时刻进行记录，终端设备可以根据在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值，确定第二时间段在第一时间段内的位置。
当在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值小于5ms时，终端设备可以确定第一时间段的起始时刻至T 0定时器的超时时刻之间的时间段并没有承载一个完整的半帧。
此时，若承载有SSB的半帧的发送周期为20ms时，终端设备可以确定在T 0定时器超时时刻之后的小于或等于10ms的时间长度内没有SSB的传输，即，终端设备确定第二时间段的起始时刻为T 0定时器的超时时刻，且第二时间段的长度小于或等于10ms，终端设备可以在第二时间段内关闭接收通道，停止接收SSB，终端设备在第一时间段内的小区搜索结束。图5示出了接收通道在第一时间段内的另一开启/关闭状态。
例如，当终端设备确定在T 0定时器的超时时刻之后的小于或等于10ms的时间长度内没有SSB的传输时，终端设备可以在T 0定时器的超时时刻再次启动定时器(例如，T 1定时器)，T 1定时器的时长可以小于或等于10ms，在T 1定时器计时期间终端设备关闭接收通道，停止接收SSB，待T 1定时器超时时，终端设备可以打开接收通道，继续接收SSB直到第一时间段的终止时刻，终端设备在第一时间段内的小区搜索结束。
上述方法1与方法2可以适用终端设备明确承载有SSB的半帧的重复周期的情况。
由于终端设备在启动小区搜索过程时可能并不清楚承载有SSB的半帧的重复周期，因此，本申请针对此情况提供下述接收同步信号的方法，该方法适用于终端设备不明确承载有SSB的半帧的重复周期的情况，并且，该方法对于承载有SSB的半帧的重复周期为5ms、10ms、以及20ms的情况，均能够降低小区搜索带来的系统功耗，并且能够提高小区搜索的速度。
方法3
作为示例而非限定，根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：
当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定在第四时间段内是否接收到同步信号，所述第四时间段的起始时刻为所述第三时间段的终止时刻，所述第四时间段的长度大于或等于5毫秒，所述第四时间段位于所述第一时间段的内部；
当在所述第四时间段内接收到同步信号时，确定所述第二时间段是所述第四时间段的终止时刻与所述第一时间段的终止时刻之间的时间段；
当在所述第四时间段内未接收到同步信号时，确定所述第二时间段的起始时刻为所述第四时间段的终止时刻，且所述第四时间段的长度小于或等于5毫秒，所述第四时间段位于所述第一时间段的内部。
具体地，终端设备在第一时间段内最早接收到SSB时，会记录最早接收到SSB的时刻，并在以该时刻为起始时刻的一段时间内(例如，第三时间段)继续对SSB进行接收，并会记录在第三时间段内接收到的SSB时刻，终端设备可以根据在第三时间段内最晚接收到的一个SSB(例如，第二同步信号)的时刻与第一时间段的起始时刻之间的差值，确定第二时间段在第一时间段内的位置。其中，第三时间段的长度可以大于或等于5ms。
例如，终端设备可以在最早接收到SSB时启动定时器(例如，T 0定时器)，该T 0定时器的时长与第三时间段的长度相等(例如，T 0定时器的时长为5ms)，终端设备会对T 0定时器超时前接收到的SSB的时刻进行记录，终端设备可以根据在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值，确定第二时间段在第一时间段内的位置。
当在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值大于或等于5ms时，终端设备可以确定承载有SSB的半帧位于第一时间段的起始时刻与T 0定时器的超时时刻之间。即，终端设备可以确定在T 0定时器超时之前，终端设备已经在第一时间段内接收到了承载有SSB的完整的半帧，此时，终端设备可以确定第二时间段是T 0定时器的超时时刻与第一时间段的终止时刻之间的时间段，终端设备可以在第二时间段内关闭接收通道，停止接收SSB，终端设备在第一时间段内的小区搜索结束。
当在T 0定时器计时期间最晚接收到的一个SSB的时刻与第一时间段的起始时刻之间的差值小于5ms时，终端设备可以确定第一时间段的起始时刻至T 0定时器的超时时刻之间的时间段并没有承载一个完整的半帧。
此时，终端设备可以在T 0定时器的超时时刻之后的一段时间(例如，第四时间段)内继续对SSB进行接收。
若终端设备在第四时间段内接收到SSB，则终端设备可以确定已经在第一时间段内接收到承载有SSB的完整的半帧，终端设备可以确定第二时间段是第四时间段的终止时刻与第一时间段的终止时刻之间的时间段，终端设备可以在第二时间段内关闭接收通道，停止接收SSB，终端设备在第一时间段内的小区搜索结束。
例如，终端设备可以在T 0定时器的超时时刻再次启动定时器(T 2定时器)，T 2定时器的时长与第四时间段的长度相等，T 2定时器的时长可以为5ms。若终端设备在T 2定时器计时期间接收到SSB，则终端设备可以确定已经在第一时间段内接收到承载有SSB的完整的半帧，终端设备可以确定第二时间段是T 2定时器的超时时刻与第一时间段的终止时刻之间的时间段，终端设备可以在第二时间段内关闭接收通道，停止接收SSB，终端设 备在第一时间段内的小区搜索结束。
若终端设备在T 2定时器计时期间没有接收到SSB，则终端设备可以确定在T 2定时器超时时刻之后的小于或等于5ms的时间长度内没有SSB的传输时，即，终端设备确定第二时间段的起始时刻为T 2定时器的超时时刻，且第二时间段的长度小于或等于5ms，终端设备可以在T 2定时器的超时时刻再次启动定时器(例如，T 3定时器)，T 3定时器的时长可以小于或等于5ms，在T 3定时器计时期间终端设备关闭接收通道，停止接收SSB，待T 3定时器超时时，终端设备可以打开接收通道，继续接收SSB直到第一时间段的终止时刻，终端设备在第一时间段内的小区搜索结束。图6示出了接收通道在第一时间段内的另一开启/关闭状态。
需要说明的是，在本申请实施例中，除非特别说明，本申请实施例中出现的同步信号值得是SSB。
还需要说明的是，第二时间段是第一时间段中的终端设备无需接收同步信号的时间段，第二时间段中可能承载有同步信号，或者，也可能没有承载同步信号，本申请对此不作特别限定。无论终端设备在第二时间段内有没有承载同步信号，在本申请实施例中，终端设备都不会在第二时间段上接收同步信号。
以上，结合图1至图6详细说明了本申请实施例提供的接收同步信号的方法。以下，结合图7至图8细说明本申请实施例提供的通信装置。
图7示出了根据本申请实施例的接收同步信号的装置300的示意性框图。所述装置300用于执行前文方法实施例中终端设备执行的方法。可选地，所述装置300的具体形态可以是终端设备中的芯片。本申请实施例对此不作限定。所述装置300包括：
处理模块301，用于根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，所述第二时间段为所述第一时间段中的所述终端设备无需接收同步信号的时间段，所述第二时间段位于接收到所述第一同步信号的时刻之后，所述第一同步信号为在所述第一时间段内最早接收到的同步信号。
所述处理模块301还用于，在所述第二时间段内关闭接收通道，停止接收同步信号。
收发模块302，用于接收包括第一同步信号在内的多个同步信号。
可选地，所述处理模块301还用于，当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔大于或等于5毫秒时，确定所述第二时间段是所述第三时间段的终止时刻与所述第一时间段的终止时刻之间的时间段，
其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第三时间段位于所述第一时间段的内部，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
可选地，所述处理模块301还用于，当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定所述第二时间段的起始时刻为所述第三时间段的终止时刻，且所述第二时间段的长度小于或等于10毫秒，
其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
可选地，所述处理模块301还用于，当在第三时间段内接收到的第二同步信号的时刻 与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定在第四时间段内是否接收到同步信号，所述第四时间段的起始时刻为所述第三时间段的终止时刻，所述第四时间段的长度大于或等于5毫秒，所述第四时间段位于所述第一时间段的内部；
当在所述第四时间段内接收到同步信号时，确定所述第二时间段是所述第四时间段的终止时刻与所述第一时间段的终止时刻之间的时间段；
当在所述第四时间段内未接收到同步信号时，确定所述第二时间段的起始时刻为所述第四时间段的终止时刻，且所述第四时间段的长度小于或等于5毫秒，所述第四时间段位于所述第一时间段的内部。
应理解，根据本申请实施例的接收同步信号的装置300可对应于根据本申请实施例的方法200实施例中的终端设备，装置300可以包括用于执行图3中的方法200实施例中的终端设备执行的方法的模块。并且装置300中的各个模块的上述和其它操作和/或功能分别为了实现图3中的方法200实施例中由终端设备执行的相应步骤，因此也可以实现前述方法实施例中的有益效果，为了简洁，这里不作赘述。
还应理解，装置300中的各个模块可以通过软件和/或硬件形式实现，对此不作具体限定。换言之，装置300是以功能模块的形式来呈现。这里的“模块”可以指特定应用集成电路ASIC、电路、执行一个或多个软件或固件程序的处理器和存储器、集成逻辑电路，和/或其他可以提供上述功能的器件。可选地，在一个简单的实施例中，本领域的技术人员可以想到装置300可以采用图8所示的形式。处理模块301可以通过图8所示的处理器401和存储器402来实现。收发模块302可以通过图8所示的收发器403来实现。具体的，处理器通过执行存储器中存储的计算机程序来实现。可选地，当所述装置300是芯片时，那么收发模块302的功能和/或实现过程还可以通过管脚或电路等来实现。可选地，所述存储器为所述芯片内的存储单元，比如寄存器、缓存等，所述存储单元还可以是所述计算机设备内的位于所述芯片外部的存储单元，如图8所示的存储器402。
图8示出了根据本申请实施例的接收同步信号的装置400的示意性结构图。如图8所示，所述装置400包括：处理器401。
在一种可能的实现方式中，所述处理器401用于，根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，所述第二时间段为所述第一时间段中的所述终端设备无需接收同步信号的时间段，所述第二时间段位于接收到所述第一同步信号的时刻之后，所述第一同步信号为在所述第一时间段内最早接收到的同步信号。
所述处理器401还用于，在所述第二时间段内关闭接收通道，停止接收同步信号。
所述处理器401还用于调用接口执行以下动作：接收包括第一同步信号在内的多个同步信号。
可选地，所述处理器401还用于，当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔大于或等于5毫秒时，确定所述第二时间段是所述第三时间段的终止时刻与所述第一时间段的终止时刻之间的时间段，
其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第三时间段位于所述第一时间段的内部，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
可选地，所述处理器401还用于，当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定所述第二时间段的起始时刻为所述第三时间段的终止时刻，且所述第二时间段的长度小于或等于10毫秒，
其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
可选地，所述处理器401还用于，当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定在第四时间段内是否接收到同步信号，所述第四时间段的起始时刻为所述第三时间段的终止时刻，所述第四时间段的长度大于或等于5毫秒，所述第四时间段位于所述第一时间段的内部；
当在所述第四时间段内接收到同步信号时，确定所述第二时间段是所述第四时间段的终止时刻与所述第一时间段的终止时刻之间的时间段；
当在所述第四时间段内未接收到同步信号时，确定所述第二时间段的起始时刻为所述第四时间段的终止时刻，且所述第四时间段的长度小于或等于5毫秒，所述第四时间段位于所述第一时间段的内部。
应理解，所述处理器401可以调用接口执行上述发送动作，其中，调用的接口可以是逻辑接口或物理接口，本申请实施例对此不作限定。可选地，物理接口可以通过收发器实现。可选地，所述装置400还可以包括收发器403。
可选地，所述装置400还包括存储器402，存储器402中可以存储上述方法实施例中的程序代码，以便于处理器401调用。
具体地，若所述装置400包括处理器401、存储器402和收发器403，则处理器401、存储器402和收发器403之间通过内部连接通路互相通信，传递控制和/或数据信号。在一个可能的设计中，处理器401、存储器402和收发器403可以通过芯片实现，处理器401、存储器402和收发器403可以是在同一个芯片中实现，也可能分别在不同的芯片实现，或者其中任意两个功能组合在一个芯片中实现。该存储器402可以存储程序代码，处理器401调用存储器402存储的程序代码，以实现装置400的相应功能。
应理解，所述装置400还可用于执行前文实施例中终端设备侧的其他步骤和/或操作，为了简洁，这里不作赘述。
应理解，上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器 或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
还应理解，本发明实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计 算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (8)

  1. 一种接收同步信号的方法，其特征在于，所述方法由终端设备执行，包括：
    根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，所述第二时间段为所述第一时间段中的所述终端设备无需接收同步信号的时间段，所述第二时间段位于接收到所述第一同步信号的时刻之后，所述第一同步信号为在所述第一时间段内最早接收到的同步信号；
    在所述第二时间段内关闭接收通道，停止接收同步信号。
  2. 根据权利要求1所述的方法，其特征在于，所述根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：
    当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔大于或等于5毫秒时，确定所述第二时间段是所述第三时间段的终止时刻与所述第一时间段的终止时刻之间的时间段，
    其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第三时间段位于所述第一时间段的内部，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
  3. 根据权利要求1所述的方法，其特征在于，所述根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：
    当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定所述第二时间段的起始时刻为所述第三时间段的终止时刻，且所述第二时间段的长度小于或等于10毫秒，
    其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
  4. 根据权利要求1所述的方法，其特征在于，所述根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，包括：
    当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定在第四时间段内是否接收到同步信号，所述第四时间段的起始时刻为所述第三时间段的终止时刻，所述第四时间段的长度大于或等于5毫秒，所述第四时间段位于所述第一时间段的内部；
    当在所述第四时间段内接收到同步信号时，确定所述第二时间段是所述第四时间段的终止时刻与所述第一时间段的终止时刻之间的时间段；
    当在所述第四时间段内未接收到同步信号时，确定所述第二时间段的起始时刻为所述第四时间段的终止时刻，且所述第四时间段的长度小于或等于5毫秒，所述第四时间段位于所述第一时间段的内部。
  5. 一种接收同步信号的装置，其特征在于，包括：
    处理模块，用于根据在第一时间段内接收到第一同步信号的时刻与所述第一时间段的起始时刻，确定第二时间段在第一时间段中的位置，所述第二时间段为所述第一时间段中的所述终端设备无需接收同步信号的时间段，所述第二时间段位于接收到所述第一同步信号的时刻之后，所述第一同步信号为在所述第一时间段内最早接收到的同步信号；
    所述处理模块还用于，在所述第二时间段内关闭接收通道，停止接收同步信号。
  6. 根据权利要求5所述的装置，其特征在于，所述处理模块还用于，
    当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔大于或等于5毫秒时，确定所述第二时间段是所述第三时间段的终止时刻与所述第一时间段的终止时刻之间的时间段，
    其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第三时间段位于所述第一时间段的内部，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
  7. 根据权利要求5所述的装置，其特征在于，所述处理模块还用于，
    当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定所述第二时间段的起始时刻为所述第三时间段的终止时刻，且所述第二时间段的长度小于或等于10毫秒，
    其中，所述第三时间段的起始时刻为接收到所述第一同步信号的时刻，所述第三时间段的长度大于或等于5毫秒，所述第二同步信号是在所述第三时间段内最晚接收到的一个同步信号。
  8. 根据权利要求5所述的装置，其特征在于，所述处理模块还用于，
    当在第三时间段内接收到的第二同步信号的时刻与所述第一时间段的起始时刻之间的间隔小于5毫秒时，确定在第四时间段内是否接收到同步信号，所述第四时间段的起始时刻为所述第三时间段的终止时刻，所述第四时间段的长度大于或等于5毫秒，所述第四时间段位于所述第一时间段的内部；
    当在所述第四时间段内接收到同步信号时，确定所述第二时间段是所述第四时间段的终止时刻与所述第一时间段的终止时刻之间的时间段；
    当在所述第四时间段内未接收到同步信号时，确定所述第二时间段的起始时刻为所述第四时间段的终止时刻，且所述第四时间段的长度小于或等于5毫秒，所述第四时间段位于所述第一时间段的内部。
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