WO2020020322A1 - 通信方法和装置 - Google Patents

通信方法和装置 Download PDF

Info

Publication number
WO2020020322A1
WO2020020322A1 PCT/CN2019/097818 CN2019097818W WO2020020322A1 WO 2020020322 A1 WO2020020322 A1 WO 2020020322A1 CN 2019097818 W CN2019097818 W CN 2019097818W WO 2020020322 A1 WO2020020322 A1 WO 2020020322A1
Authority
WO
WIPO (PCT)
Prior art keywords
downlink reference
reference signal
signal groups
information
groups
Prior art date
Application number
PCT/CN2019/097818
Other languages
English (en)
French (fr)
Inventor
温容慧
吕永霞
张永平
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
Publication of WO2020020322A1 publication Critical patent/WO2020020322A1/zh

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0638Clock or time synchronisation among nodes; Internode synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes

Definitions

  • the present application relates to communication technologies, and in particular, to a communication method and device.
  • the access network equipment can provide a time synchronization source for the terminal equipment, that is, send time information to the terminal equipment, so that the terminal equipment in the cell and the network equipment maintain time synchronization, and indirectly reach the terminal equipment.
  • Time synchronization requirements The current high-precision synchronization requirement proposed by the industry is 1us (microseconds) (+ -500ns synchronization accuracy), which includes errors such as uplink synchronization accuracy, downlink synchronization accuracy, and hardware time drift. On the order of 100ns (nanoseconds). Under the premise of the same subcarrier interval, the larger the bandwidth occupied by the downlink synchronization signal, the more accurate the time synchronization information is.
  • the time synchronization obtained according to the downlink synchronization signal Information can meet the needs of high-precision synchronization.
  • the time synchronization information obtained according to the downlink synchronization signal cannot meet the high-precision synchronization requirement.
  • the time synchronization information obtained according to the downlink synchronization signal cannot meet the high-precision synchronization requirement.
  • the present application provides a communication method and device, which can meet the high-precision synchronization requirement when the downlink synchronization signal occupies less bandwidth.
  • a first aspect of the present application provides a time synchronization method based on a downlink reference signal, including:
  • the terminal device receives configuration information of multiple downlink reference signal groups sent by an access network device, and each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal, where the downlink reference signal is used for Time synchronization
  • the terminal device receives the multiple downlink reference signal groups sent by the access network device within the same or K adjacent time units according to the configuration information, and K is greater than 1 and less than or equal to the multiple The total number of downlink reference signals included in each downlink reference signal group, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the terminal device selects all or part of the downlink reference signal groups from the plurality of downlink reference signal groups for merge detection according to a preset merge rule or merge instruction information sent by the access network device to obtain synchronization information.
  • the interval of the downlink reference signals used by the terminal device for combined detection in the time domain is small, which can ensure multiple downlink reference signals used for combined detection.
  • the reference signal group is located within 10ms, and the detection result is highly correlated. By combining and detecting multiple downlink reference signal groups, the synchronization accuracy of the terminal device is improved.
  • the merge indication information includes first indication information, and the first indication information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected;
  • the terminal device selects all or a part of the downlink reference signal groups from the multiple downlink reference signal groups for merge detection according to the merge instruction information sent by the access network device, and obtains synchronization information, including:
  • the terminal device performs combined detection on all downlink reference signal groups in the multiple downlink reference signal groups according to the first instruction information to obtain the synchronization information.
  • the access network device sends the first instruction information to instruct the terminal device to combine and detect all downlink reference signal groups, and the instruction method is simple and easy to implement.
  • the combination indication information includes: periodic information of a downlink reference signal group to be combined;
  • the terminal device selects all or a part of the downlink reference signal groups from the multiple downlink reference signal groups for merge detection according to the merge instruction information sent by the access network device, and obtains synchronization information, including:
  • the downlink reference signal group with the same cycle of the signal group is the downlink signal group to be combined
  • the terminal device performs merge detection on the downlink reference signal group to be merged to obtain the synchronization information.
  • the access network device instructs the terminal device to combine multiple downlink reference signal groups of a specified period by using a merge instruction message, and the indication method is more flexible.
  • the merge indication information includes: information of a start time of a downlink reference signal group to be merged and the number N of downlink reference signal groups to be merged;
  • the terminal device selects all or a part of the downlink reference signal groups from the multiple downlink reference signal groups for merge detection according to the merge instruction information sent by the access network device, and obtains synchronization information, including:
  • the terminal device performs merge detection on the downlink reference signal group to be merged to obtain the synchronization information.
  • the access network device instructs the terminal device to merge the N downlink reference signal groups after the specified start time is started through the merge instruction message, and the indication method is more flexible.
  • the merge indication information includes index information of a downlink reference signal group to be merged
  • the terminal device selects all or a part of the downlink reference signal groups from the multiple downlink reference signal groups for merge detection according to the merge instruction information sent by the access network device, and obtains synchronization information, including:
  • the terminal device Determining, by the terminal device, the downlink reference signal group corresponding to the index information from the multiple downlink reference signal groups according to the index information of the downlink reference signal group to be combined as the downlink reference signal group to be combined;
  • the terminal device performs merge detection on the downlink reference signal group to be merged to obtain the synchronization information.
  • the access network device instructs the terminal device to combine multiple downlink reference signal groups of the specified index information through a merge instruction message, and the indication method is more flexible.
  • the terminal device selects all or a part of the downlink reference signal groups from the received multiple downlink reference signal groups for combined detection according to a preset merge rule, and obtains synchronization information, including:
  • N downlink reference signal groups from the plurality of received downlink reference signal groups according to a preset number N of downlink reference signal groups to be combined as the downlink signal group to be combined;
  • the terminal device determines, from the plurality of downlink reference signal groups received, that the downlink reference signal groups having the same bandwidth and / or the same resource block are downlink signal groups to be combined;
  • the terminal device performs merge detection on the downlink reference signal group to be merged to obtain the synchronization information.
  • the terminal device selects multiple downlink reference signal groups for merging by using a preset merging rule, and does not need an instruction from an access network device, which saves signaling overhead.
  • the multiple downlink reference signal groups are all periodic downlink reference signals.
  • the multiple downlink reference signal groups are all non-periodic downlink reference signals.
  • the plurality of downlink reference signal groups include a periodic downlink reference signal and an aperiodic downlink reference signal.
  • the multiple downlink reference signal groups can be flexibly configured as periodic and aperiodic downlink reference signals, making the resources occupied by the downlink reference signal group more flexible.
  • a second aspect of the present application provides a time synchronization method based on a downlink reference signal, including:
  • the access network device sends configuration information of multiple downlink reference signal groups to the terminal device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal, and the downlink reference signal is used for time synchronization.
  • the access network device sends the multiple downlink reference signal groups on the same or K adjacent time units according to the configuration information of the multiple downlink reference signal groups, where K is greater than 1 and less than or equal to the The total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the access network device sends merge indication information to the terminal device.
  • the access network device configures multiple downlink reference signal groups for the terminal device, sends multiple downlink reference groups in the same or K adjacent time units, and instructs the terminal device to perform the merge detection, so that the terminal device is used for the merge detection.
  • the interval of the downlink reference signals in the time domain is small, and the detection results are highly correlated.
  • the merge indication information includes first indication information, and the first indication information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected; or,
  • the merge indication information includes: periodic information of a downlink reference signal group to be merged; or,
  • the merge indication information includes: information of the number N of downlink reference signal groups to be merged and the start time of the downlink reference signal group to be merged; or,
  • the merge indication information includes index information of a downlink reference signal group to be merged.
  • the multiple downlink reference signal groups are all periodic downlink reference signals.
  • the multiple downlink reference signal groups are all non-periodic downlink reference signals.
  • the plurality of downlink reference signal groups include a periodic downlink reference signal and an aperiodic downlink reference signal.
  • a third aspect of the present application provides a method for determining time synchronization, including:
  • the terminal device receives bandwidth information of a downlink reference signal sent by the access network device, and the downlink reference signal is used for time synchronization;
  • the terminal device When the bandwidth of the downlink reference signal is less than the minimum bandwidth, the terminal device does not perform time synchronization.
  • the terminal device when the bandwidth of the downlink reference signal is insufficient, the terminal device does not perform time difference, thereby avoiding that the accuracy of the synchronization signal does not meet requirements.
  • the terminal device when the bandwidth of the downlink reference signal is less than the minimum bandwidth, the terminal device does not perform time synchronization, which prevents the terminal device from performing invalid or unsatisfactory synchronization operations, which not only prevents terminal devices from generating synchronization errors, but also saves terminal devices Processing resources.
  • the minimum bandwidth is set in advance, or the terminal device is obtained according to a channel quality measurement.
  • the acquisition of the minimum bandwidth is made more flexible and convenient.
  • a fourth aspect of the present application provides a method for determining time synchronization, including: an access network device sending bandwidth information of a downlink reference signal to a terminal device, where the downlink reference signal is used for time synchronization.
  • a fifth aspect of the present application provides a time synchronization method based on a downlink reference signal, including:
  • the terminal device receives the first period information of the downlink reference signal group and the second period information of the downlink reference signal in the downlink reference signal group sent by the access network device.
  • the first period is greater than the second period.
  • the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the terminal device combines and detects downlink reference signals in the downlink reference signal group to obtain synchronization information.
  • the multiple detections of the downlink reference signal in the downlink reference signal group are combined to detect the correlation of the combined detection results. Stronger, which improves the synchronization accuracy of the terminal equipment.
  • the receiving, by a terminal device, first cycle information of a downlink reference signal group and second cycle information of a downlink reference signal in the downlink reference signal group sent by an access network device includes:
  • the access network device indicates the first period information of the first period information of the downlink reference signal group through dynamic signaling, so as to be able to dynamically control the transmission of the downlink reference signal, while the second period information is usually constant and is indicated by high-level signaling. save resources.
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • a sixth aspect of the present application provides a time synchronization method based on a downlink reference signal, including:
  • the access network device sends the first period information of the downlink reference signal group and the second period information of the downlink reference signal in the downlink reference signal group to the terminal device.
  • the first period is greater than the second period, and the downlink
  • the reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the access network device sends the downlink reference signal group to the terminal device according to the first period information and the second period information.
  • the access network device sending the first periodic information of the downlink reference signal group and the second periodic information of the downlink reference signal in the downlink reference signal group to the terminal device includes:
  • the access network device sends the first period information to the terminal device through downlink control information.
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • a seventh aspect of the present application provides a time synchronization method based on a downlink reference signal, including:
  • a terminal device Receiving, by a terminal device, a downlink reference signal sent by an access network device and usage indication information of the downlink reference signal, where the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or time synchronization;
  • the terminal device uses the downlink reference signal to perform position tracking and / or time synchronization according to the usage indication information of the downlink reference signal.
  • the access network device indicates the usage indication information of the downlink reference signal, so that the terminal device can accurately know the usage of the downlink reference signal and avoid unnecessary operations.
  • An eighth aspect of the present application provides a time synchronization method based on a downlink reference signal, including:
  • the access network device sends a downlink reference signal to the terminal device and usage indication information of the downlink reference signal, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or time synchronization.
  • a ninth aspect of the present application provides a time synchronization device based on a downlink reference signal, including: a processor, a memory, and a transceiver.
  • the memory is configured to store instructions.
  • the transceiver is configured to communicate with other devices.
  • the processor is configured to: Executing the instructions stored in the memory, specifically:
  • the transceiver is configured to receive configuration information of multiple downlink reference signal groups sent by an access network device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal.
  • the downlink reference signal is used for time synchronization;
  • the transceiver is configured to receive the multiple downlink reference signal groups sent by the access network device within the same or K adjacent time units according to the configuration information, where K is greater than 1 and less than or equal to The total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the processor is configured to select all or part of the downlink reference signal group from the multiple downlink reference signal groups received by the transceiver according to a preset merge rule or merge instruction information sent by the access network device Perform merge detection to get synchronization information.
  • the processor is specifically configured to:
  • the merge instruction information includes first instruction information
  • the first instruction information is used to indicate that all downlink reference signal groups in the multiple downlink reference signal groups are to be combined and detected, according to the first instruction information, All downlink reference signal groups in the multiple downlink reference signal groups are combined and detected to obtain the synchronization information.
  • the processor is specifically configured to:
  • the combination instruction information includes period information of a downlink reference signal group to be combined, according to the period information of the downlink reference signal group to be combined and the period information of the multiple downlink reference signal groups, Among the three downlink reference signal groups, it is determined that the downlink reference signal group having the same cycle as the downlink reference signal group to be combined is the downlink signal group to be combined;
  • the processor is specifically configured to:
  • the combination instruction information includes information about a start time of a downlink reference signal group to be combined and the number N of the downlink reference signal groups to be combined, according to the start time of the downlink reference signal group to be combined Information and the number N of downlink reference signal groups to be merged, starting from the start time of the downlink reference signal group to be merged, determining consecutive N downlink references from the plurality of downlink reference signal groups
  • a signal group is the downlink reference signal group to be combined;
  • the processor is specifically configured to:
  • the merge instruction information includes index information of a downlink reference signal group to be merged, according to the index information of the downlink reference signal group to be merged, a corresponding one of the index information is determined from the multiple downlink reference signal groups.
  • the downlink reference signal group is the downlink reference signal group to be combined;
  • the processor is specifically configured to:
  • N Downlink reference signal groups from the received multiple downlink reference signal groups as the downlink signal group to be combined; or, The terminal device determines, from the plurality of downlink reference signal groups received, that the downlink reference signal groups having the same bandwidth and / or the same resource block are downlink signal groups to be combined;
  • the multiple downlink reference signal groups are all periodic downlink reference signals.
  • the multiple downlink reference signal groups are all non-periodic downlink reference signals.
  • the plurality of downlink reference signal groups include a periodic downlink reference signal and an aperiodic downlink reference signal.
  • a tenth aspect of the present application provides a time synchronization device based on a downlink reference signal, including: a processor, a memory, and a transceiver.
  • the memory is configured to store instructions.
  • the transceiver is configured to communicate with other devices.
  • the processor is configured to: Executing the instructions stored in the memory, specifically:
  • the transceiver is configured to send configuration information of multiple downlink reference signal groups to a terminal device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal.
  • the downlink reference signal is used for: Time synchronization
  • the transceiver is configured to send the multiple downlink reference signal groups on the same or K adjacent time units according to the configuration information of the multiple downlink reference signal groups, where K is greater than 1 and less than or equal to The total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the transceiver is configured to send merge indication information to the terminal device.
  • the merge indication information includes first indication information, and the first indication information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected; or,
  • the merge indication information includes: periodic information of a downlink reference signal group to be merged; or,
  • the merge indication information includes: information of the number N of downlink reference signal groups to be merged and the start time of the downlink reference signal group to be merged; or,
  • the merge indication information includes index information of a downlink reference signal group to be merged.
  • the multiple downlink reference signal groups are all periodic downlink reference signals.
  • the multiple downlink reference signal groups are all non-periodic downlink reference signals.
  • the plurality of downlink reference signal groups include a periodic downlink reference signal and an aperiodic downlink reference signal.
  • An eleventh aspect of the present application provides a device for determining time synchronization, including: a processor, a memory, and a transceiver, where the memory is used to store instructions, the transceiver is used to communicate with other devices, and the processor is used to execute all
  • the instructions stored in the memory are as follows:
  • the transceiver is configured to receive bandwidth information of a downlink reference signal sent by an access network device, and the downlink reference signal is used for time synchronization;
  • the processor is configured to not perform time synchronization when a bandwidth of the downlink reference signal received by the transceiver is less than a minimum bandwidth.
  • the processor is further configured to set the minimum bandwidth in advance, or obtain the minimum bandwidth according to a channel quality measurement.
  • a twelfth aspect of the present application provides a device for determining time synchronization, including: a processor, a memory, and a transceiver, where the memory is used to store instructions, the transceiver is used to communicate with other devices, and the processor is used to execute all
  • the instructions stored in the memory are as follows:
  • the transceiver is configured to send bandwidth information of a downlink reference signal to a terminal device, where the downlink reference signal is used for time synchronization.
  • a thirteenth aspect of the present application provides a time synchronization device based on a downlink reference signal, including: a processor, a memory, and a transceiver.
  • the memory is used to store instructions.
  • the transceiver is used to communicate with other devices. For executing the instructions stored in the memory, specifically:
  • the transceiver is configured to receive first period information of a downlink reference signal group and second period information of a downlink reference signal in the downlink reference signal group sent by an access network device, where the first period is greater than the first period information.
  • the transceiver is further configured to receive a downlink reference signal group sent by the access network device according to the first period information and the second period information;
  • the processor is configured to combine and detect downlink reference signals in the downlink reference signal group received by the transceiver to obtain synchronization information.
  • the transceiver is specifically configured to:
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • a fourteenth aspect of the present application provides a time synchronization device based on a downlink reference signal, including: a processor, a memory, and a transceiver.
  • the memory is used to store instructions.
  • the transceiver is used to communicate with other devices. For executing the instructions stored in the memory, specifically:
  • a transceiver configured to send first cycle information of a downlink reference signal group and second cycle information of a downlink reference signal in the downlink reference signal group to a terminal device, where the first cycle is greater than the second cycle, and
  • the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the transceiver is further configured to send the downlink reference signal group to the terminal device according to the first period information and the second period information.
  • the transceiver is specifically configured to:
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • a fifteenth aspect of the present application provides a time synchronization device based on a downlink reference signal, including: a processor, a memory, and a transceiver.
  • the memory is used to store instructions.
  • the transceiver is used to communicate with other devices. For executing the instructions stored in the memory, specifically:
  • the transceiver is configured to receive a downlink reference signal sent by an access network device and usage indication information of the downlink reference signal, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / Or time synchronization
  • the processor is configured to use the downlink reference signal to perform position tracking and / or time synchronization according to usage indication information of the downlink reference signal received by the transceiver.
  • a sixteenth aspect of the present application provides a time synchronization device based on a downlink reference signal, including a processor, a memory, and a transceiver.
  • the memory is used to store instructions.
  • the transceiver is used to communicate with other devices. For executing the instructions stored in the memory, specifically:
  • the transceiver is configured to send a downlink reference signal to the terminal device and usage indication information of the downlink reference signal, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or time synchronization. .
  • a seventeenth aspect of the present application provides a time synchronization device based on a downlink reference signal, and the device includes a method for performing any one of the first, third, fifth, and seventh aspects of the present application. Function module.
  • An eighteenth aspect of the present application provides a time synchronization device based on a downlink reference signal, and the device includes a method for performing any one of the second, fourth, sixth, and eighth aspects of the present application.
  • Function module
  • a nineteenth aspect of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, cause a computer to execute the instructions as in the first aspect, the third aspect, and the fifth aspect of the application. Aspect, the method of any one of the seventh aspects.
  • the twentieth aspect of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, cause a computer to execute the operations as described in the second aspect, the fourth aspect, and the sixth aspect of the application. Aspect, the method of any one of the eighth aspects.
  • a terminal device receives configuration information of multiple downlink reference signal groups sent by an access network device, and each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal. Or receive multiple downlink reference signal groups sent by the access network device within K adjacent time units, and select all from multiple downlink reference signal groups according to a preset merge rule or merge instruction information sent by the access network device. Or part of the downlink reference signal groups are combined and detected to obtain synchronization information. Because multiple downlink reference groups are sent in the same or K adjacent time units, the interval of the downlink reference signals used for combined detection in the time domain is small, and multiple downlink reference signals used for combined detection can be guaranteed. The group is located within 10ms, and the detection result is highly correlated. By combining and detecting multiple downlink reference signal groups, the synchronization accuracy of the terminal device is improved.
  • FIG. 1 is a schematic diagram of a communication system applicable to an embodiment of the present application
  • FIG. 2 is a flowchart of a downlink reference signal-based time synchronization method according to Embodiment 1 of the present application;
  • 3 is a schematic diagram of time-frequency resources of a downlink reference signal group
  • 4 is another schematic diagram of time-frequency resources of a downlink reference signal group
  • FIG. 5 is a signaling flowchart of a downlink reference signal-based time synchronization method according to Embodiment 2 of the present application.
  • FIG. 6 is a flowchart of a method for determining time synchronization provided in Embodiment 3 of the present application.
  • FIG. 7 is a flowchart of a downlink reference signal-based time synchronization method according to a fourth embodiment of the present application.
  • FIG. 8 is a schematic diagram of a first period and a second period of a downlink reference signal group
  • FIG. 9 is a flowchart of a downlink reference signal-based time synchronization method according to Embodiment 5 of the present application.
  • FIG. 10 is a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 6 of the present application.
  • FIG. 11 is a schematic structural diagram of a time synchronization apparatus based on a downlink reference signal according to Embodiment 8 of the present application;
  • FIG. 12 is a schematic structural diagram of a time synchronization apparatus based on a downlink reference signal according to Embodiment 9 of the present application.
  • FIG. 13 is a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 10 of the present application.
  • FIG. 14 is a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 14 of the present application.
  • FIG. 15 is a schematic structural diagram of a time synchronization apparatus based on a downlink reference signal according to Embodiment 15 of the present application.
  • FIG. 1 is a schematic diagram of a communication system applicable to an embodiment of the present application.
  • the communication system includes a core network device, an access network device, and at least one terminal device.
  • the terminal equipment is connected to the access network equipment wirelessly, and the access network equipment is connected to the core network equipment wirelessly or wiredly.
  • the core network device and the access network device can be independent and different physical devices, or the functions of the core network device and the access network device's logical functions can be integrated on the same physical device, or they can be a physical device. It integrates the functions of some core network equipment and some radio access network equipment.
  • the terminal equipment can be fixed or removable.
  • FIG. 1 is only a schematic diagram, and the communication system may further include other network devices, for example, it may further include a wireless relay device and a wireless backhaul device.
  • the access network equipment can be a Global System (GSM) system or a Code Division Multiple Access (CDMA) base station (Base Transceiver Station, BTS), or a broadband code division multiple station.
  • GSM Global System
  • CDMA Code Division Multiple Access
  • BTS Base Transceiver Station
  • WCDMA Wideband, Code, Division, Multiple Access
  • NodeB, NB can also be evolved base station (Evolved NodeB, eNB), access point (access) point (AP) or relay station, or a base station (such as a gNB or Transmission Point (TRP)) in a fifth generation mobile communication (5G) system, or a cloud wireless access network (Cloud Radio controllers in the Radio Access Network (CRAN) scenario and wearable devices or vehicle-mounted devices are not limited here.
  • the 5G system is also called a new wireless communication system, a new access technology (New Radio), or a next-generation mobile communication system.
  • the terminal equipment mentioned in this application may also be referred to as a terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), and the like.
  • the terminal device can be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control (industrial control) ), Wireless terminals in self-driving, wireless terminals in remote surgery, wireless terminals in smart grid, wireless terminals in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, and the like.
  • Wireless access network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water; it can also be deployed on air planes, balloons and satellites.
  • the embodiments of this application do not limit the application scenarios of the radio access network device and the terminal device.
  • FIG. 2 is a flowchart of a downlink reference signal-based time synchronization method according to Embodiment 1 of the present application. As shown in FIG. 2, the method provided by this embodiment includes the following steps:
  • Step S101 The terminal device receives configuration information of multiple downlink reference signal groups sent by the access network device.
  • Each downlink reference signal group in the plurality of downlink reference signal groups includes at least one downlink reference signal, where the downlink reference signal is used for time synchronization.
  • the downlink reference signal may be a tracking reference signal (TRS).
  • TRS tracking reference signal
  • the TRS is generally used for tracking the position of a terminal device.
  • the TRS may also be used for time synchronization.
  • the name of the downlink reference signal used for time synchronization is limited, and the downlink reference signal may also be referred to as a channel state information reference signal ((Channel-state information-Reference) (CSI-RS) for tracking.
  • CSI-RS channel state information reference signal
  • the downlink reference signal group is also referred to as a downlink reference signal cluster or a downlink reference signal burst.
  • the configuration information of each downlink reference signal group includes the time-frequency resource information of the downlink reference signal in the group.
  • this configuration also includes the bandwidth information of the downlink reference signal.
  • the configuration information of the downlink reference signal group can be configured through high-level signaling, such as radio resource control (Radio Resource Control (RRC) signaling or media access control control element (Media Access Control). Control element, MAC CE).
  • RRC Radio Resource Control
  • Media Access Control Media Access Control
  • Control element MAC CE
  • Step S102 The terminal device receives the multiple downlink reference signal groups sent by the access network device within the same or K adjacent time units according to the configuration information.
  • the multiple downlink reference signal groups are sent in the same or K adjacent time units, and the time units may be subframes or slots or other time units.
  • K is greater than 1 and less than or equal to multiple downlink references.
  • K number of downlink reference signal groups * occupied by each downlink reference signal group Number of time units, where the number of time units occupied by each downlink reference signal group is at least one, and the number of time units occupied by each downlink reference signal group is at most the number of downlink reference signals included in the downlink reference signal group number.
  • K that a plurality of downlink reference signal groups include The total number of downlink references.
  • the number of downlink reference signals included in each downlink reference signal group may also be different, and the number of time units occupied by each downlink reference signal group may also be different. At this time, multiple downlink reference signal groups need to be occupied. Add the number of time units to get the K value.
  • the multiple downlink reference signal groups are all periodic downlink reference signals; or, the multiple downlink reference signal groups are all non-periodic downlink reference signals; or the multiple downlink reference signal groups include periodic downlink reference signals. Signal and aperiodic downlink reference signal.
  • the multiple downlink reference signal groups occupy different time-frequency resources. When the multiple downlink reference signal groups are transmitted in the same time unit, the multiple downlink reference signal groups occupy different time-frequency resources in the time unit. When the plurality of downlink reference signal groups are transmitted in K adjacent time units, the plurality of downlink reference signal groups may be transmitted in the same or different time-frequency resources of K adjacent time units.
  • the time domain configuration information of the multiple downlink reference signal groups is: the sequence numbers of the time domain symbols occupied by the downlink reference signals in each downlink reference signal group, and the frequencies of the multiple downlink reference signal groups.
  • the configuration information of the domain may be the number of subcarrier intervals of adjacent downlink reference signals, and the bandwidth occupied by the multiple downlink reference signal groups may be one or more resource blocks (RBs).
  • One RB occupies one in the time domain.
  • the time slot occupies 12 subcarriers in the frequency domain.
  • the RB and subcarrier spacing (SCS) occupied by the multiple downlink reference signal groups in the frequency domain can be 15KHZ, 30KHZ, or 60KHZ.
  • the three downlink reference signal groups are transmitted in the same subframe.
  • Each downlink reference signal group includes two downlink reference signals, and the three downlink reference signal groups are periodic.
  • the configuration information of the time domain resources of the three downlink reference signal groups may be: ⁇ 4,8 ⁇ , ⁇ 5,9 ⁇ , ⁇ 6,10 ⁇ , where ⁇ 4,8 ⁇ represents the time domain symbols occupied by the two downlink reference signals included in the first downlink reference signal group are 4 and 8, and ⁇ 5,9 ⁇ represents the second downlink reference signal
  • the time-domain symbols occupied by the two downlink reference signals included in the group are 5 and 9, and ⁇ 6,10 ⁇ indicates that the time-domain symbols occupied by the two downlink reference signals included in the third downlink reference signal group are 6 and 10.
  • the periodic downlink reference signal may be configured according to the foregoing configuration method.
  • the access network device can individually configure the time domain resources and frequency domain resources of each downlink reference signal.
  • the time domain resources of the aperiodic downlink reference signal can be the time domain symbols, time slots or subframes occupied by the aperiodic downlink reference signal.
  • the frequency domain resources of the downlink reference signal may be subcarriers occupied by the aperiodic downlink reference signal.
  • time domain resources and frequency domain resources may be configured for low frequencies and high frequencies, respectively, and the same time domain resources and frequency domain resources may be configured for high frequencies and low frequencies.
  • FIG. 3 is a schematic diagram of time-frequency resources of a downlink reference signal group.
  • three downlink reference signal groups are transmitted in one subframe, occupying 12 subcarriers in the frequency domain, and one subframe includes 12 Or 14 time domain symbols.
  • the downlink reference signal group 1 occupies symbol 4 (symbols are numbered from 0) and symbol 8 in the time domain, and the downlink reference signal group 1 occupies subcarrier 0 (subcarriers are numbered from 0), subcarrier 4 and subcarriers in the frequency domain.
  • the downlink reference signal group 2 occupies the same symbol in the time domain as the downlink reference signal group 1, and the downlink reference signal group 1 occupies subcarrier 2, subcarrier 6, and subcarrier 10 in the frequency domain.
  • the downlink reference signal group 3 occupies symbols 6 and 10 in the time domain, and the downlink reference signal group 3 occupies the same subcarriers as the downlink reference signal group 1 in the frequency domain.
  • the three downlink reference signal groups in FIG. 3 are all periodic downlink reference signals.
  • FIG. 4 is another schematic diagram of time-frequency resources of a downlink reference signal group.
  • two downlink reference signal groups are transmitted in two adjacent subframes, occupying 12 subcarriers in the frequency domain, and one subcarrier.
  • the frame includes 12 or 14 time domain symbols.
  • Downlink reference signal group 1 occupies symbol 4 (symbols are numbered from 0) and symbol 8 in the time domain.
  • Downlink reference signal group 1 occupies symbol 4 and symbol 8 of subframe X in the time domain, and subcarriers in the frequency domain.
  • downlink reference signal group 2 occupies symbol 4 and symbol 8 of subframe X + 1 in the time domain, and downlink reference signal group 2 occupies subcarrier 0, subcarrier 4, and subcarrier in the frequency domain 8.
  • the two downlink reference signal groups occupy the same symbols in the time domain and occupy the same subcarriers in the frequency domain.
  • Step S103 The terminal device selects all or part of the downlink reference signal groups from multiple downlink reference signal groups for merge detection according to a preset merge rule or the merge instruction information sent by the access network device to obtain synchronization information.
  • the merge indication information includes first indication information, and the first indication information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected.
  • the terminal device combines and detects all downlink reference signal groups in the multiple downlink reference signal groups according to the first instruction information to obtain synchronization information.
  • the combined detection can superimpose multiple downlink reference groups in the frequency domain or the time domain. Since multiple downlink reference groups are sent in the same or K adjacent time units, the downlink reference signals used for combined detection The interval in the time domain is small. Practical experience shows that the correlation between time synchronization detection results within 10ms is strong. After 20ms, the difference between the two detection results may reach more than 10Ts (330ns). Multiple synchronizations will cause synchronization information errors. Larger. In this embodiment, multiple downlink reference signal groups used for combined detection can be guaranteed to be located within 10 ms, and the detection results are highly correlated. By combining and detecting multiple downlink reference signal groups, the synchronization accuracy of the terminal device is improved.
  • the merge indication information includes: periodic information of a downlink reference signal group to be merged.
  • the periods of the multiple downlink reference signal groups may be different from each other, or the periods of some of the downlink reference signal groups are the same, and the periods of the remaining downlink reference signal groups are different.
  • the combined instruction information is used to indicate the downlink of a certain period or several periods.
  • the reference signal groups are merged.
  • the terminal device determines from the plurality of downlink reference signal groups that the period of the downlink reference signal group to be merged is the same as the cycle of the downlink reference signal group to be merged according to the cycle information of the downlink reference signal group to be merged and the cycle information of the plurality of downlink reference signal groups.
  • the downlink reference signal group is the downlink signal group to be combined, and the downlink reference signal group to be combined is combined and detected to obtain synchronization information.
  • the period of downlink reference signal groups 1 and 3 is T1
  • the period of downlink reference signal group 2 is T2
  • the period of downlink reference signal group 4 is T3.
  • the merging instruction information may be T1.
  • the terminal device After receiving the merging instruction information, the terminal device performs merging detection on the downlink reference signal group 1 and the downlink reference signal group 3.
  • the merge indication information may also be T2 and T3.
  • the terminal device After receiving the merge indication information, the terminal device performs merge detection on the downlink reference signal group 2 and the downlink reference signal group 4.
  • the merge instruction information may also be T1, T2, and T3. After receiving the merge instruction information, the terminal device performs merge detection on the downlink reference signal groups 1, 2, 3, and 4.
  • the combination indication information includes: information of a start time of a downlink reference signal group to be combined and a number N of downlink reference signal groups to be combined.
  • the terminal device starts from the start time of the downlink reference signal group to be combined and starts from multiple downlinks according to the information of the start time of the downlink reference signal group to be combined and the number of downlink reference signal groups N to be combined.
  • the reference signal group it is determined that N consecutive downlink reference signal groups are downlink reference signal groups to be combined, and the downlink reference signal groups to be combined are combined and detected to obtain synchronization information.
  • the information of the start time of the downlink reference signal group to be combined may be the start symbol of the downlink reference signal group to be combined, that is, the downlink reference signal group starting from a certain symbol is combined.
  • the combination indication information may not include the number N of downlink reference signal groups to be combined, and the number N of downlink reference signal groups to be combined may be specified in advance.
  • the merge indication information may further include information on a start time and an end time of a downlink reference signal group to be merged, and the terminal device performs all downlink reference signal groups in the start time and the end time. merge.
  • the merge indication information includes index information of a downlink reference signal group to be merged.
  • an index needs to be set for each downlink reference signal group in a plurality of downlink reference signal groups, for example, the base station configures the reference signal.
  • Resource Index Resource ID
  • the terminal device determines from multiple downlink reference signal groups that the downlink reference signal group corresponding to the index information is the downlink reference signal group to be merged, and the downlink reference signal to be merged The group performs merge detection to obtain synchronization information.
  • the indication information may carry any two of the four indexes, any three indexes, or four indexes.
  • the access network device needs to send the merge instruction information to instruct the terminal device to which downlink reference signal groups in the multiple downlink reference signal groups are combined.
  • the merging rule is pre-installed in the terminal device and does not need to be instructed by the access network device.
  • the terminal device determines N downlink reference signal groups as the downlink signal groups to be merged from the plurality of received downlink reference signal groups according to a preset number N of downlink reference signal groups to be merged, and is to be merged.
  • the downlink reference signal group is combined and detected to obtain synchronization information.
  • the value of N is less than or equal to the number of multiple downlink reference signal groups configured by the access network device.
  • the access network device configures four downlink reference signal groups for the terminal device.
  • the terminal device combines all downlink reference signal groups.
  • the terminal device may sequentially select N downlink reference signal groups for merging in the time domain order or the frequency domain order. For example, the terminal device selects N downlink reference signal groups from small arrivals according to the time domain symbol, or selects N downlink reference signal groups from low to high according to the frequency domain.
  • the terminal device determines, from the plurality of downlink reference signal groups received, that the downlink reference signal groups with the same bandwidth and / or the same resource block are downlink signal groups to be merged, and performs merge detection on the downlink reference signal groups to be merged to obtain synchronization. information.
  • the terminal device receives configuration information of multiple downlink reference signal groups sent by the access network device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal, in the same or K number of downlink reference signal groups.
  • the reference signal group is combined and detected to obtain synchronization information. Since multiple downlink reference groups are sent in the same or K adjacent time units, the interval of the downlink reference signals used for combined detection in the time domain is small, and multiple downlink references used for combined detection can be guaranteed.
  • the signal group is located within 10ms, and the detection result is highly correlated. By combining and detecting multiple downlink reference signal groups, the synchronization accuracy of the terminal device is improved.
  • FIG. 5 is a signaling flowchart of a downlink reference signal-based time synchronization method provided in Embodiment 2 of the present application. As shown in FIG. 5, the method provided by this embodiment includes the following steps:
  • Step S201 The access network device sends configuration information of multiple downlink reference signal groups to the terminal device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal, the downlink reference signal is used for time synchronization, and configuration information of the multiple downlink reference signal groups includes time-frequency resources of the downlink reference signal group. Information, optionally, the configuration information also includes bandwidth information of a downlink reference signal.
  • the multiple downlink reference signal groups are all periodic downlink reference signals, or the multiple downlink reference signal groups are all non-periodic downlink reference signals, or the multiple downlink reference signal groups include periodic downlink reference signals and Aperiodic downlink reference signal.
  • Step S202 The access network device sends multiple downlink reference signal groups on the same or K adjacent time units according to configuration information of multiple downlink reference signal groups.
  • K is greater than 1 and less than or equal to the total number of downlink reference signals included in multiple downlink reference signal groups, and multiple downlink reference signal groups occupy different time-frequency resources.
  • Step S203 The access network device sends the merge instruction information to the terminal device.
  • the combination instruction information includes first instruction information, and the first instruction information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected.
  • the combination indication information includes: period information of a downlink reference signal group to be combined.
  • the combination indication information includes information of the number N of downlink reference signal groups to be combined and the start time of the downlink reference signal group to be combined.
  • the combination indication information includes index information of a downlink reference signal group to be combined.
  • Step S204 The terminal device selects all or a part of the downlink reference signal groups from a plurality of downlink reference signal groups for combined detection according to the merge instruction information to obtain synchronization information.
  • the access network device configures multiple downlink reference signal groups for the terminal device, sends the multiple downlink reference signal groups on the same or K adjacent time units, and sends the merge instruction information to the terminal device. , Instructs the terminal device to select all or part of the downlink reference signal groups from multiple downlink reference signal groups for combined detection. Since multiple downlink reference groups are sent in the same or K adjacent time units, the interval of the downlink reference signals used for combined detection in the time domain is small, and multiple downlink references used for combined detection can be guaranteed.
  • the signal group is located within 10ms, and the detection result is highly correlated. By combining and detecting multiple downlink reference signal groups, the synchronization accuracy of the terminal device is improved.
  • multiple downlink reference signal groups sent on the same or K adjacent time units are combined and detected, so that even if the access network device configures the bandwidth or part of the bandwidth for the terminal device ( The Bandwidth Part (BWP) cannot meet the needs of the terminal for high-precision synchronization, and can also perform high-precision synchronization.
  • the Bandwidth Part (BWP) cannot meet the needs of the terminal for high-precision synchronization, and can also perform high-precision synchronization.
  • the minimum bandwidth of the downlink reference signal is 50RB.
  • the terminal device can perform high-precision synchronization. If the bandwidth of the downlink reference signal is less than 50RB, the obtained synchronization information cannot meet the requirement of high precision.
  • the minimum bandwidth of the downlink reference signal used for high-precision synchronization is related to SCS.
  • SCS is 30KHZ
  • the minimum bandwidth of the downlink reference signal used for high-precision synchronization is 25RB.
  • the method in the prior art is used for synchronization. The methods of the first embodiment and the second embodiment are synchronized.
  • FIG. 6 is a flowchart of a time synchronization determination method provided in the third embodiment of the present application. As shown in FIG. 6, the method provided by this embodiment includes the following steps:
  • Step S301 The terminal device receives bandwidth information of a downlink reference signal sent by the access network device, and the downlink reference signal is used for time synchronization.
  • Step S302 When the bandwidth of the downlink reference signal is less than the minimum bandwidth, the terminal device does not perform time synchronization.
  • the minimum bandwidth is set in advance, or is obtained by the terminal device according to the channel quality measurement.
  • the terminal device is pre-configured with a mapping relationship between channel quality and bandwidth.
  • the channel quality may be a signal-to-noise ratio (SNR).
  • SNR signal-to-noise ratio
  • the mapping relationship is, for example: SNR ⁇ -5dB, bandwidth is greater than 50RB; SNR ⁇ 0dB, bandwidth is greater than 25RB.
  • the terminal device determines the bandwidth of the downlink reference signal by measuring the current channel quality and according to the current channel quality and the mapping relationship.
  • the bandwidth of the downlink reference signal may also be a minimum bandwidth configured by the access network device for the terminal device according to the channel quality of the terminal device.
  • the minimum bandwidth is related to the SCS.
  • the minimum bandwidth is 25RB
  • the minimum bandwidth is 50RB.
  • the terminal device does not perform time synchronization, or the terminal equipment that needs high-precision synchronization does not expect the bandwidth of the downlink reference signal to be less than the minimum bandwidth, which prevents the terminal device from performing time synchronization. Invalid or unsatisfactory synchronization operations not only prevent synchronization errors from occurring on the terminal device, but also save processing resources on the terminal device.
  • FIG. 7 is a flowchart of a downlink reference signal-based time synchronization method provided in Embodiment 4 of the present application. Unlike the method of Embodiment 1, in this embodiment, an access network device only needs to configure a downlink reference signal group for a terminal device. As shown in FIG. 7, the method provided in this embodiment includes the following steps:
  • Step S401 The terminal device receives the first period information of the downlink reference signal group and the second period information of the downlink reference signal in the downlink reference signal group sent by the access network device.
  • the first period is greater than the second period, and the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization.
  • the first period is the period of the downlink reference signal group.
  • the first period can also be called the synchronization period.
  • the information of the first period can be the interval between the start time and the end time of two adjacent downlink reference signal groups. It may also be the interval between the end time of the previous downlink reference signal group and the start time of the next downlink reference signal group.
  • the synchronization period for high-precision time synchronization is only about 100ms. If the synchronization period between the two access devices is still based on the existing downlink reference signal period (m_period) Sending a downlink reference signal may cause waste of time-frequency resources.
  • m_period is greater than or equal to 10ms. Assuming m_period is equal to 10ms, the access network device sends a downlink reference signal every 10ms within a synchronization period of 100ms, resulting in resources. waste.
  • a second period is configured for downlink reference signals in the downlink reference signal group.
  • the downlink reference signal group includes at least two downlink reference signals.
  • the second period may be: adjacent downlink The interval of the start time of the reference signal, or the interval of the end time of the adjacent downlink reference signal, or the interval of the end time of the previous downlink reference signal and the start time of the next downlink reference signal.
  • the second period is less than 10 ms, and the second period is, for example, 1 ms, 2 ms, and the like.
  • FIG. 8 is a schematic diagram of the first period and the second period of the downlink reference signal group.
  • the first period of the downlink reference signal group is the interval between the start times of two adjacent downlink reference signal groups.
  • the period is 100 ms.
  • the downlink reference signal group includes two downlink reference signals.
  • the second period is the interval between the start times of adjacent downlink reference signals.
  • the second period is 2 ms.
  • the access network device sends the second period information through high-level signaling (such as an RRC message), and sends the first period information through dynamic control signaling.
  • the dynamic control information may be downlink control information (DCI).
  • DCI downlink control information
  • both the first period information and the second period information can be sent through high-level signaling.
  • the first period information may also be a start time and / or an end time of a downlink reference signal group. Among them, the start time and the end time can be carried through one signaling or two signalings.
  • Step S402 The terminal device receives a downlink reference signal group sent by the access network device according to the first period information and the second period information.
  • the access network device sends the downlink reference signal group to the terminal device according to the first period information and the second period information.
  • Step S403 The terminal device combines and detects the downlink reference signals in the downlink reference signal group to obtain synchronization information.
  • the terminal device receives the first period information of the downlink reference signal group and the second period information of the downlink reference signal in the downlink reference signal group sent by the access network device.
  • the first period is greater than the second period
  • the downlink reference signal is The group includes at least two downlink reference signals.
  • the terminal device receives the downlink reference signal group sent by the access network device according to the first periodic information and the second periodic information, and combines and detects the downlink reference signals in the downlink reference signal group to obtain synchronization information. . Because the second period of the downlink reference signal in the downlink reference signal group is less than 10 ms, the combined detection result is highly correlated. By combining and detecting multiple downlink reference signals in the downlink reference signal group, the synchronization accuracy of the terminal device is improved.
  • FIG. 9 is a flowchart of a downlink reference signal-based time synchronization method provided in Embodiment 5 of the present application. As shown in FIG. 9, the method provided by this embodiment includes the following steps:
  • Step S501 The terminal device receives the downlink reference signal and the usage indication information of the downlink reference signal sent by the access network device.
  • the purpose indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or time synchronization.
  • the usage indication information may be implemented by RRC signaling, such as adding an indication information to the NZP-CSI-RS-ResourceSet information element signaling, or may be indicated by adding a new IE (information element).
  • Step S502 The terminal device uses the downlink reference signal to perform position tracking and / or time synchronization according to the usage indication information of the downlink reference signal.
  • the usage indication information of the downlink reference signal may be separately indicated, or may be indicated together with the bandwidth information and period information of the downlink reference signal.
  • the method of the fifth embodiment may be used alone or in combination with the first embodiment, the second embodiment, and the fourth embodiment.
  • the access network device sends the usage indication information of the downlink reference signal group to the terminal device.
  • the configuration information may be indicated together, or may be indicated together with the bandwidth information of the downlink reference signal group, and the usage indication information of the downlink reference signal group may also be separately indicated. If the usage indicated by the usage indication information of the downlink reference signal is time synchronization, or when the location tracking and time synchronization are performed, the terminal device uses the method of Embodiment 1 to perform time synchronization.
  • the access network device may indicate the usage indication information of the downlink reference signal with the first cycle information and / or the second cycle information through one signaling, or through multiple signaling. Signaling is indicated separately. If the usage indicated by the usage indication information of the downlink reference signal is time synchronization, the terminal device uses the method of Embodiment 4 to perform time synchronization.
  • FIG. 10 is a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 6 of the present application.
  • the apparatus may be applied to a terminal device. As shown in FIG. 10, the apparatus includes:
  • the receiving module 11 is configured to receive configuration information of multiple downlink reference signal groups sent by an access network device, where each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal, and the downlink The reference signal is used for time synchronization;
  • the receiving module 11 is further configured to receive the multiple downlink reference signal groups sent by the access network device within the same or K adjacent time units according to the configuration information, where K is greater than 1 and less than Or equal to the total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • a synchronization module 12 is configured to select all or part of the downlink reference signal groups from the multiple downlink reference signal groups for merge detection according to a preset merge rule or the merge instruction information sent by the access network device to obtain synchronization information. .
  • the synchronization module 12 is specifically configured to: when the merge indication information includes first indication information, the first indication information is used to instruct all downlink reference signal groups in the multiple downlink reference signal groups When performing merge detection, according to the first instruction information, perform merge detection on all downlink reference signal groups in the multiple downlink reference signal groups to obtain the synchronization information.
  • the synchronization module 12 is specifically configured to: when the merge indication information includes period information of a downlink reference signal group to be merged, according to the cycle information of the downlink reference signal group to be merged, and the Describing the periodic information of the plurality of downlink reference signal groups, and determining, from the plurality of downlink reference signal groups, a downlink reference signal group having the same period as the period of the downlink reference signal group to be combined as the downlink signal group to be combined; Perform merge detection on the downlink reference signal group to be merged to obtain the synchronization information.
  • the synchronization module 12 is specifically configured to: when the merge indication information includes information about a start time of a downlink reference signal group to be merged and the number N of downlink reference signal groups to be merged , According to the information about the start time of the downlink reference signal group to be combined and the number N of the downlink reference signal groups to be combined, starting from the start time of the downlink reference signal group to be combined, starting from Among the plurality of downlink reference signal groups, it is determined that N consecutive downlink reference signal groups are the downlink reference signal groups to be combined; and the downlink reference signal groups to be combined are combined and detected to obtain the synchronization information.
  • the synchronization module 12 is specifically configured to: when the merge indication information includes index information of a downlink reference signal group to be merged, from the index information of the downlink reference signal group to be merged, It is determined in the plurality of downlink reference signal groups that the downlink reference signal group corresponding to the index information is the downlink reference signal group to be merged; the downlink reference signal group to be merged is combined and detected to obtain the synchronization information.
  • the synchronization module 12 is specifically configured to determine N downlink reference signals from the plurality of received downlink reference signal groups according to a preset number N of downlink reference signal groups to be combined.
  • the group is the downlink signal group to be combined; or, the terminal device determines, from the plurality of downlink reference signal groups received, that the downlink reference signal group with the same bandwidth and / or the same resource block is the downlink signal to be combined Group; performing merge detection on the downlink reference signal group to be combined to obtain the synchronization information.
  • the multiple downlink reference signal groups are all periodic downlink reference signals; or the multiple downlink reference signal groups are all non-periodic downlink reference signals; or the multiple downlink reference signals are The group includes periodic downlink reference signals and aperiodic downlink reference signals.
  • the apparatus provided in this embodiment may be used to execute the method steps performed by the terminal device in Embodiment 1 and Embodiment 2.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • Embodiment 7 of the present application provides a time synchronization device based on a downlink reference signal.
  • the device may be applied to an access network device.
  • the device includes:
  • a sending module configured to send configuration information of multiple downlink reference signal groups to a terminal device, where each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal, and the downlink reference signal is used for time synchronization ;
  • the sending module is further configured to send the multiple downlink reference signal groups on the same or K adjacent time units according to the configuration information of the multiple downlink reference signal groups, where K is greater than 1 and less than or equal to The total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the sending module is further configured to send merge indication information to the terminal device.
  • the merge indication information includes first indication information, and the first indication information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected; or,
  • the merge indication information includes: periodic information of a downlink reference signal group to be merged; or,
  • the merge indication information includes: information of the number N of downlink reference signal groups to be merged and the start time of the downlink reference signal group to be merged; or,
  • the merge indication information includes index information of a downlink reference signal group to be merged.
  • the multiple downlink reference signal groups are all periodic downlink reference signals.
  • the multiple downlink reference signal groups are all non-periodic downlink reference signals.
  • the plurality of downlink reference signal groups include a periodic downlink reference signal and an aperiodic downlink reference signal.
  • the apparatus provided in this embodiment may be used to execute the method steps performed by the access network device in Embodiment 1 and Embodiment 2.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of a time synchronization determining apparatus according to Embodiment 8 of the present application.
  • the apparatus may be applied to a terminal device. As shown in FIG. 11, the apparatus includes:
  • the receiving module 21 is configured to receive bandwidth information of a downlink reference signal sent by an access network device, where the downlink reference signal is used for time synchronization;
  • a synchronization module 22 is configured to not perform time synchronization when a bandwidth of the downlink reference signal is less than a minimum bandwidth.
  • the minimum bandwidth is set in advance, or the terminal device is obtained according to a channel quality measurement.
  • the terminal device provided in this embodiment may be used to execute the method in Embodiment 3.
  • the specific implementation manner and technical effects are similar, and details are not described herein again.
  • a schematic structural diagram of a time synchronization determining device provided in Embodiment 9 of the present application.
  • the device may be applied to an access network device.
  • the device includes a sending module configured to send bandwidth information of a downlink reference signal to a terminal device.
  • the downlink reference signal is used for time synchronization.
  • FIG. 12 is a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 10 of the present application.
  • the apparatus may be applied to a terminal device. As shown in FIG. 12, the apparatus includes:
  • the receiving module 31 is configured to receive first cycle information of a downlink reference signal group and second cycle information of a downlink reference signal in the downlink reference signal group sent by an access network device, where the first cycle is greater than the second cycle Period, the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the receiving module 31 is further configured to receive a downlink reference signal group sent by the access network device according to the first period information and the second period information;
  • a synchronization module 32 is configured to combine and detect downlink reference signals in the downlink reference signal group to obtain synchronization information.
  • the receiving module 31 is specifically configured to:
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • the apparatus provided in this embodiment may be used to execute the method performed by the terminal device in Embodiment 4. Specific implementation manners and technical effects are similar, and details are not described herein again.
  • a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 11 of the present application.
  • the apparatus may be applied to an access network device.
  • the apparatus includes:
  • a sending module configured to send first cycle information of a downlink reference signal group and second cycle information of a downlink reference signal in the downlink reference signal group to a terminal device, where the first cycle is greater than the second cycle, and
  • the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the sending module is further configured to send the downlink reference signal group to the terminal device according to the first period information and the second period information.
  • the sending module is specifically configured to:
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • FIG. 13 is a schematic structural diagram of a downlink reference signal-based time synchronization apparatus according to Embodiment 12 of the present application.
  • the apparatus may be applied to a terminal device. As shown in FIG. 13, the apparatus includes:
  • the receiving module 41 is configured to receive a downlink reference signal sent by an access network device and usage indication information of the downlink reference signal, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or Time synchronization
  • the processing module 42 is configured to perform position tracking and / or time synchronization using the downlink reference signal according to the usage indication information of the downlink reference signal.
  • the apparatus provided in this embodiment may be used to execute the method performed by the terminal device in Embodiment 5.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • the apparatus may be applied to an access network device.
  • the apparatus includes:
  • the sending module is configured to send a downlink reference signal and usage indication information of the downlink reference signal to the terminal device, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or time synchronization.
  • FIG. 14 is a schematic structural diagram of a time synchronization device based on a downlink reference signal according to Embodiment 14 of the present application.
  • the device is applied to a terminal device.
  • the device includes a processor 51 and a memory. 52 and a transceiver 53, the memory 52 is used to store instructions, the transceiver 53 is used to communicate with other devices, and the processor 51 is used to execute instructions stored in the memory 52, specifically:
  • the transceiver 53 is configured to receive configuration information of multiple downlink reference signal groups sent by an access network device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal.
  • the downlink reference signal is used for time synchronization;
  • the transceiver 53 is configured to receive the multiple downlink reference signal groups sent by the access network device within the same or K adjacent time units according to the configuration information, where K is greater than 1 and less than or Equal to the total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the processor 51 is configured to select all or part of a downlink reference signal group from a plurality of downlink reference signal groups received by the transceiver 53 according to a preset merge rule or merge instruction information sent by the access network device. Perform merge detection to get synchronization information.
  • the processor 51 is specifically configured to: when the combination indication information includes first indication information, the first indication information is used to instruct all downlink reference signal groups in the multiple downlink reference signal groups When performing merge detection, according to the first instruction information, perform merge detection on all downlink reference signal groups in the multiple downlink reference signal groups to obtain the synchronization information.
  • the processor 51 is specifically configured to: when the merge indication information includes: periodic information of a downlink reference signal group to be merged, according to the periodic information of the downlink reference signal group to be merged, and Periodic information of the plurality of downlink reference signal groups, and from the plurality of downlink reference signal groups, it is determined that a downlink reference signal group having the same cycle as that of the downlink reference signal group to be combined is the downlink signal group to be combined. Performing merge detection on the downlink reference signal group to be merged to obtain the synchronization information.
  • the processor 51 is specifically configured to: when the merge indication information includes: information about a start time of a downlink reference signal group to be merged and the number N of downlink reference signal groups to be merged When starting from the start time of the downlink reference signal group to be merged, starting from the start time of the downlink reference signal group to be combined, Among the plurality of downlink reference signal groups, it is determined that N consecutive downlink reference signal groups are the downlink reference signal groups to be combined; and the downlink reference signal groups to be combined are combined and detected to obtain the synchronization information.
  • the processor 51 is specifically configured to: when the merge indication information includes index information of a downlink reference signal group to be merged, from the index information of the downlink reference signal group to be merged, from It is determined in the plurality of downlink reference signal groups that the downlink reference signal group corresponding to the index information is the downlink reference signal group to be merged; the downlink reference signal group to be merged is combined and detected to obtain the synchronization information.
  • the processor 51 is specifically configured to determine N downlink reference signals from the received multiple downlink reference signal groups according to a preset number N of downlink reference signal groups to be combined.
  • the group is the downlink signal group to be combined; or, the terminal device determines, from the plurality of downlink reference signal groups received, that the downlink reference signal group with the same bandwidth and / or the same resource block is the downlink signal to be combined Group; performing merge detection on the downlink reference signal group to be combined to obtain the synchronization information.
  • the multiple downlink reference signal groups are all periodic downlink reference signals; or the multiple downlink reference signal groups are all non-periodic downlink reference signals; or the multiple downlink reference signals are The group includes periodic downlink reference signals and aperiodic downlink reference signals.
  • the apparatus provided in this embodiment may be used to execute the method steps performed by the terminal device in Embodiment 1 and Embodiment 2.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • FIG. 15 is a schematic structural diagram of a time synchronization apparatus based on a downlink reference signal according to Embodiment 15 of the present application.
  • the apparatus is applied to an access network device.
  • the apparatus includes: a processor 61 A memory 62 and a transceiver 63.
  • the memory 62 is used to store instructions.
  • the transceiver 63 is used to communicate with other devices.
  • the processor 61 is used to execute the instructions stored in the memory 62. Specifically:
  • the transceiver 63 is configured to send configuration information of multiple downlink reference signal groups to a terminal device.
  • Each downlink reference signal group in the multiple downlink reference signal groups includes at least one downlink reference signal. Synchronize with time
  • the transceiver 63 is configured to send the multiple downlink reference signal groups on the same or K adjacent time units according to the configuration information of the multiple downlink reference signal groups, where K is greater than 1 and less than or equal to The total number of downlink reference signals included in the multiple downlink reference signal groups, and the multiple downlink reference signal groups occupy different time-frequency resources;
  • the transceiver 63 is configured to send merge indication information to the terminal device.
  • the merge indication information includes first indication information, and the first indication information is used to instruct that all downlink reference signal groups in the multiple downlink reference signal groups are combined and detected; or,
  • the merge indication information includes: periodic information of a downlink reference signal group to be merged; or,
  • the merge indication information includes: information of the number N of downlink reference signal groups to be merged and the start time of the downlink reference signal group to be merged; or,
  • the merge indication information includes index information of a downlink reference signal group to be merged.
  • the multiple downlink reference signal groups are all periodic downlink reference signals.
  • the multiple downlink reference signal groups are all non-periodic downlink reference signals.
  • the plurality of downlink reference signal groups include a periodic downlink reference signal and an aperiodic downlink reference signal.
  • the access network device provided in this embodiment may be used to execute the method steps performed by the access network device in Embodiment 1 and Embodiment 2.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • Embodiment 16 of the present application provides a terminal device.
  • the structure of the terminal device is shown in FIG. 14. Specifically,
  • the transceiver 53 is configured to receive bandwidth information of a downlink reference signal sent by an access network device, where the downlink reference signal is used for time synchronization;
  • the processor 51 is configured to not perform time synchronization when a bandwidth of the downlink reference signal is less than a minimum bandwidth.
  • the minimum bandwidth is set in advance, or the terminal device is obtained according to a channel quality measurement.
  • the terminal device provided in this embodiment may be used to execute the method in Embodiment 3.
  • the specific implementation manner and technical effects are similar, and details are not described herein again.
  • Embodiment 17 of the present application provides an access network device.
  • the structure of the access network device is shown in FIG. 15.
  • the transceiver 63 is configured to send bandwidth information of a downlink reference signal to a terminal device.
  • the downlink reference signal is used for time synchronization.
  • the eighteenth embodiment of the present application provides a terminal device.
  • the structure of the terminal device is shown in FIG. 14, specifically:
  • the transceiver 53 is configured to receive first period information of a downlink reference signal group and second period information of a downlink reference signal in the downlink reference signal group sent by an access network device, where the first period is greater than the second period Period, the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the transceiver 53 is further configured to receive a downlink reference signal group sent by the access network device according to the first period information and the second period information;
  • the processor 51 is configured to combine and detect downlink reference signals in the downlink reference signal group to obtain synchronization information.
  • the transceiver 53 is specifically configured to:
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • the terminal device provided in this embodiment may be used to execute the method in Embodiment 4, and specific implementation methods and technical effects are similar, and details are not described herein again.
  • Embodiment 19 of the present application provides an access network device.
  • the structure of the access network device is shown in FIG. 15. Specifically,
  • the transceiver 63 is configured to send first cycle information of a downlink reference signal group and second cycle information of a downlink reference signal in the downlink reference signal group to a terminal device, where the first cycle is greater than the second cycle, so
  • the downlink reference signal group includes at least two downlink reference signals, and the downlink reference signals are used for time synchronization;
  • the transceiver 63 is further configured to send the downlink reference signal group to the terminal device according to the first period information and the second period information.
  • the transceiver 63 is specifically configured to:
  • the first period information includes a start time and / or an end time of the downlink reference signal group.
  • Embodiment 20 of the present application provides a terminal device.
  • the structure of the terminal device is shown in FIG. 14. Specifically:
  • the transceiver 53 is configured to receive a downlink reference signal sent by an access network device and usage indication information of the downlink reference signal, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or Time synchronization
  • the processor 51 is configured to perform position tracking and / or time synchronization using the downlink reference signal according to the usage indication information of the downlink reference signal.
  • the terminal device provided in this embodiment may be used to execute the method in Embodiment 5.
  • the specific implementation manner and technical effects are similar, and details are not described herein again.
  • Embodiment 21 of the present application provides an access network device.
  • the structure of the access network device is shown in FIG. 15. Specifically,
  • the transceiver 63 is configured to send a downlink reference signal and usage indication information of the downlink reference signal to a terminal device, and the usage indication information of the downlink reference signal is used to instruct the terminal device to perform position tracking and / or time Synchronize.
  • the twenty-second embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, causes a computer to execute a method performed by a terminal device as in the foregoing embodiments of the present application. .
  • the twenty-third embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, causes the computer to execute the execution as described by the access network device in the foregoing embodiment of the application. Methods.
  • the processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or an off-the-shelf programmable gate array (FPGA). Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • a 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 combination with the embodiments of the present invention may be directly embodied as being executed by a hardware decoding processor, or may be executed and completed by using a combination of hardware and software units in the decoding processor.
  • the software unit can be located in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory or electrically erasable programmable memory, registers, etc.
  • Storage media The storage medium is located in a memory, and the processor reads the instructions in the memory and completes the steps of the foregoing method in combination with its hardware.
  • the disclosed apparatus and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • 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, which may be 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, 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 objective 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 of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware, or in the form of hardware plus software functional units.

Landscapes

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

Abstract

本申请提供一种基于下行参考信号的时间同步方法和装置,终端设备接收接入网设备发送的多个下行参考信号组的配置信息,多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,在相同的或者K个相邻的时间单元内接收接入网设备发送的多个下行参考信号组,根据预设的合并规则或者接入网设备发送的合并指示信息,从多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。由于多个下行参考组在相同的或者K个相邻的时间单元内发送,因此,用于合并检测的下行参考信号在时域上的间隔较小,可以保证用于合并检测的多个下行参考信号组位于10ms内,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。

Description

通信方法和装置
本申请要求于2018年07月27日提交中国专利局、申请号为201810848236.9、申请名称为“基于下行参考信号的时间同步方法和装置”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
本申请涉及通信技术,尤其涉及一种通信方法和装置。
背景技术
目前在工业控制领域中,大多使用有线网络配合IEEE 1588技术完成时钟同步,而未来的工业控制系统使用无线通信网络,IEEE 1588的时间同步方案与无线通信网络底层协议的兼容性不好。
接入网设备作为终端设备的集中控制器,可以为终端设备提供时间同步源,即向终端设备发送时间信息,使小区内的终端设备与网络设备保持时间同步,间接的达到终端设备之间的时间同步需求。目前业界提出的高精度同步的需求为1us(微秒)(+-500ns同步精度),这包括了上行同步精度、下行同步精度及硬件时漂等误差,分解到下行同步信号的同步精度大概在100ns(纳秒)量级。在相同子载波间隔的前提下,下行同步信号占用的带宽越大,时间同步信息越准确。根据仿真结果,当下行同步信号满足系统的1us同步需求时,以子载波间隔为15KHZ为例,占用的带宽在50资源块(resource block,RB)以上时,根据该下行同步信号得到的时间同步信息能够满足高精度同步需求。当占用的带宽小于50KHZ时,根据该下行同步信号得到的时间同步信息不能满足高精度同步需求。
综上所述,当下行同步信号占用的带宽较小时,根据该下行同步信号得到的时间同步信息不能满足高精度的同步需求。
发明内容
本申请提供一种通信方法和装置,当下行同步信号占用的带宽较少时,也能够满足高精度的同步需求。
本申请第一方面提供一种基于下行参考信号的时间同步方法,包括:
终端设备接收接入网设备发送的多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,所述下行参考信号用于时间同步;
所述终端设备根据所述配置信息,在相同的或者K个相邻的时间单元内接收所述接入网设备发送的所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述终端设备根据预设的合并规则或者所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
由于多个下行参考组在相同或者K个相邻的时间单元内发送,因此,终端设备用于合并检测的下行参考信号在时域上的间隔较小,可以保证用于合并检测的多个下行参考信号组位于10ms内,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。
在一个示例中,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中全部下行参考信号组进行合并检测;
所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
所述终端设备根据所述第一指示信息,对所述多个下行参考信号组中全部下行参考信号组进行合并检测,得到所述同步信息。
接入网设备通过发送第一指示信息,指示终端设备将全部下行参考信号组进行合并检测,指示方式简单、易于实现。
在另一个示例中,所述合并指示信息包括:待合并的下行参考信号组的周期信息;
所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
所述终端设备根据所述待合并的下行参考信号组的周期信息,以及所述多个下行参考信号组的周期信息,从所述多个下行参考信号组中确定与所述待合并的下行参考信号组的周期相同的下行参考信号组为所述待合并的下行信号组;
所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
接入网设备通过合并指示消息指示终端设备将指定周期的多个下行参考信号组进行合并,指示方式更加灵活。
在另一个示例中,所述合并指示信息包括:待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N;
所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
所述终端设备根据所述待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N,从所述待合并的下行参考信号组的起始时间开始,从所述多个下行参考信号组中确定连续的N个下行参考信号组为所述待合并的下行参考信号组;
所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
接入网设备通过合并指示消息指示终端设备将指定的起始时间开始后的N个下行参考信号组进行合并,指示方式更加灵活。
在另一个示例中,所述合并指示信息包括待合并的下行参考信号组的索引信息;
所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
所述终端设备根据所述待合并的下行参考信号组的索引信息,从所述多个下行参 考信号组中确定所述索引信息对应的下行参考信号组为所述待合并的下行参考信号组;
所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
接入网设备通过合并指示消息指示终端设备将指定索引信息的多个下行参考信号组进行合并,指示方式更加灵活。
在另一个示例中,所述终端设备根据预设的合并规则,从接收到的所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
所述终端设备根据预设的待合并的下行参考信号组的个数N,从接收到的所述多个下行参考信号组中确定N个下行参考信号组为所述待合并的下行信号组;或者,所述终端设备从接收到所述多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组;
所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
终端设备通过预设的合并规则选择多个下行参考信号组进行合并,不需要接入网设备指示,节省了信令开销。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,
所述多个下行参考信号组均为非周期性下行参考信号;或者,
所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
该多个下行参考信号组可以灵活配置为周期性和非周期性下行参考信号,使得下行参考信号组占用的资源更加灵活。
本申请第二方面提供一种基于下行参考信号的时间同步方法,包括:
接入网设备向终端设备发送多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,所述下行参考信号用于时间同步;
所述接入网设备根据所述多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述接入网设备向所述终端设备发送合并指示信息。
接入网设备通过为终端设备配置多个下行参考信号组,在相同的或者K个相邻的时间单元内发送多个下行参考组,并指示终端设备进行合并检测,使得终端设备用于合并检测的下行参考信号在时域上的间隔较小,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。
在一个示例中,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中的全部下行参考信号组进行合并检测;或者,
所述合并指示信息包括:待合并的下行参考信号组的周期信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的个数N和所述待合并的下行参考信号组的起始时间的信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的索引信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,
所述多个下行参考信号组均为非周期性下行参考信号;或者,
所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本申请第三方面提供一种时间同步的确定方法,包括:
终端设备接收接入网设备发送的下行参考信号的带宽信息,所述下行参考信号用于时间同步;
当所述下行参考信号的带宽小于最小带宽时,所述终端设备不进行时间同步。
所述方法使得下行参考信号的带宽不足时,终端设备不进行时间不同,从而避免同步信号的精度不满足要求。
本实施例中,当下行参考信号的带宽小于最小带宽时,终端设备不进行时间同步,避免了终端设备进行无效的或者不满足精度的同步操作,不仅防止终端设备发生同步错误,节省了终端设备的处理资源。
在一个示例中,所述最小带宽是预先设置的,或者,所述终端设备根据信道质量测量得到的。
通过预先配置或者终端设备实时测量最小带宽,使得最小带宽的获取更灵活、方便。
本申请第四方面提供一种时间同步的确定方法,包括:接入网设备向终端设备发送下行参考信号的带宽信息,所述下行参考信号用于时间同步。
本申请第五方面提供一种基于下行参考信号的时间同步方法,包括:
终端设备接收接入网设备发送的下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述终端设备接收所述接入网设备根据所述第一周期信息和所述第二周期信息发送的下行参考信号组;
所述终端设备将所述下行参考信号组内的下行参考信号进行合并检测,得到同步信息。
通过为终端设备配置两个周期信息,并且配置下行参考信号组内下行参考信号的第二周期小于10ms,通过对下行参考信号组内的多个下行参考信号进行合并检测,使得合并检测结果相关性较强,提高了终端设备的同步精度。
通过为下行参考信号组配置两个周期信息,并配置下行参考信号组内下行参考信号的第二周期小于10ms,使得合并检测结果相关性较强,提高了终端设备的同步精度,并且避免了资源的浪费。
在一个示例中,终端设备接收接入网设备发送的下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,包括:
所述终端设备接收所述接入网设备通过高层信令发送的所述第二周期信息;
所述终端设备接收所述接入网设备通过下行控制信息携带的所述第一周期信息。
接入网设备通过动态信令指示下行参考信号组的第一周期信息的第一周期信息,从而能够动态控制下行参考信号的发送,而第二周期信息通常为不变的,通过高层信令指示节省资源。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
本申请第六方面提供一种基于下行参考信号的时间同步方法,包括:
接入网设备向终端设备发送下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述接入网设备根据所述第一周期信息和所述第二周期信息向所述终端设备发送所述下行参考信号组。
在一个示例中,所述接入网设备向终端设备发送下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,包括:
所述接入网设备通过高层信令向所述终端设备发送所述第二周期信息;
所述接入网设备通过下行控制信息向所述终端设备发送所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
本申请第七方面提供一种基于下行参考信号的时间同步方法,包括:
终端设备接收接入网设备发送的下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步;
所述终端设备根据所述下行参考信号的用途指示信息,使用所述下行参考信号进行位置跟踪和/或时间同步。
接入网设备通过指示下行参考信号的用途指示信息,使得终端设备能够准确获知下行参考信号的用途,避免不必要的操作。
本申请第八方面提供一种基于下行参考信号的时间同步方法,包括:
接入网设备向终端设备发送下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步。
本申请第九方面提供一种基于下行参考信号的时间同步装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于接收接入网设备发送的多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,所述下行参考信号用于时间同步;
所述收发器,用于根据所述配置信息,在相同的或者K个相邻的时间单元内接收所述接入网设备发送的所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述处理器,用于根据预设的合并规则或者所述接入网设备发送的合并指示信息,从所述收发器接收的所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
在一个示例中,所述处理器具体用于:
在所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个 下行参考信号组中全部下行参考信号组进行合并检测时,根据所述第一指示信息,对所述多个下行参考信号组中全部下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器具体用于:
在所述合并指示信息包括待合并的下行参考信号组的周期信息时,根据所述待合并的下行参考信号组的周期信息,以及所述多个下行参考信号组的周期信息,从所述多个下行参考信号组中确定与所述待合并的下行参考信号组的周期相同的下行参考信号组为所述待合并的下行信号组;
对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器具体用于:
在所述合并指示信息包括待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N时,根据所述待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N,从所述待合并的下行参考信号组的起始时间开始,从所述多个下行参考信号组中确定连续的N个下行参考信号组为所述待合并的下行参考信号组;
对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器具体用于:
在所述合并指示信息包括待合并的下行参考信号组的索引信息时,根据所述待合并的下行参考信号组的索引信息,从所述多个下行参考信号组中确定所述索引信息对应的下行参考信号组为所述待合并的下行参考信号组;
对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器具体用于:
根据预设的待合并的下行参考信号组的个数N,从接收到的所述多个下行参考信号组中确定N个下行参考信号组为所述待合并的下行信号组;或者,所述终端设备从接收到所述多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组;
对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,
所述多个下行参考信号组均为非周期性下行参考信号;或者,
所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本申请第十方面提供一种基于下行参考信号的时间同步装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于向终端设备发送多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,所述下行参考信号用于时间同步;
所述收发器,用于根据所述多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述收发器,用于向所述终端设备发送合并指示信息。
在一个示例中,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中的全部下行参考信号组进行合并检测;或者,
所述合并指示信息包括:待合并的下行参考信号组的周期信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的个数N和所述待合并的下行参考信号组的起始时间的信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的索引信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,
所述多个下行参考信号组均为非周期性下行参考信号;或者,
所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本申请第十一方面提供一种时间同步的确定装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于接收接入网设备发送的下行参考信号的带宽信息,所述下行参考信号用于时间同步;
所述处理器,用于当所述收发器接收的所述下行参考信号的带宽小于最小带宽时,不进行时间同步。
在一个示例中,所述处理器还用于预先设置所述最小带宽,或者,根据信道质量测量得到所述最小带宽。
本申请第十二方面提供一种时间同步的确定装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于向终端设备发送下行参考信号的带宽信息,所述下行参考信号用于时间同步。
本申请第十三方面提供一种基于下行参考信号的时间同步装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于接收接入网设备发送的下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述收发器,还用于接收所述接入网设备根据所述第一周期信息和所述第二周期信息发送的下行参考信号组;
所述处理器,用于将所述收发器接收的所述下行参考信号组内的下行参考信号进行合并检测,得到同步信息。
在一个示例中,所述收发器具体用于:
接收所述接入网设备通过高层信令发送的所述第二周期信息;
接收所述接入网设备通过下行控制信息携带的所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结 束时间。
本申请第十四方面提供一种基于下行参考信号的时间同步装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
收发器,用于向终端设备发送下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述收发器,还用于根据所述第一周期信息和所述第二周期信息向所述终端设备发送所述下行参考信号组。
在一个示例中,所述收发器具体用于:
通过高层信令向所述终端设备发送所述第二周期信息;
通过下行控制信息向所述终端设备发送所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
本申请第十五方面提供一种基于下行参考信号的时间同步装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于接收接入网设备发送的下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步;
所述处理器,用于根据所述收发器接收的所述下行参考信号的用途指示信息,使用所述下行参考信号进行位置跟踪和/或时间同步。
本申请第十六方面提供一种基于下行参考信号的时间同步装置,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
所述收发器,用于向终端设备发送下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步。
本申请第十七方面提供一种基于下行参考信号的时间同步装置,所述装置包括用于执行本申请第一方面、第三方面、第五方面、第七方面中任一方面所述的方法的功能模块。
本申请第十八方面提供一种基于下行参考信号的时间同步装置,所述装置包括用于执行本申请第二方面、第四方面、第六方面、第八方面中任一方面所述的方法的功能模块。
本申请第十九方面提供一种计算机可读存储介质,所述计算机可读存储介质存储有指令,当所述指令被执行时,使得计算机执行如本申请第一方面、第三方面、第五方面、第七方面中任一方面所述的方法。
本申请第二十方面提供一种计算机可读存储介质,所述计算机可读存储介质存储有指令,当所述指令被执行时,使得计算机执行如本申请第二方面、第四方面、第六 方面、第八方面中任一方面所述的方法。
本申请提供的通信方法和装置,终端设备接收接入网设备发送的多个下行参考信号组的配置信息,多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,在相同或者K个相邻的时间单元内接收接入网设备发送的多个下行参考信号组,根据预设的合并规则或者接入网设备发送的合并指示信息,从多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。由于多个下行参考组在相同或者K个相邻的时间单元内发送,因此,用于合并检测的下行参考信号在时域上的间隔较小,可以保证用于合并检测的多个下行参考信号组位于10ms内,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。
附图说明
图1为本申请实施例适用的一种通信系统的示意图;
图2为本申请实施例一提供的基于下行参考信号的时间同步方法的流程图;
图3为下行参考信号组的时频资源的一种示意图;
图4为下行参考信号组的时频资源的另一种示意图;
图5为本申请实施例二提供的基于下行参考信号的时间同步方法的信令流程图;
图6为本申请实施例三提供的时间同步的确定方法的流程图;
图7为本申请实施例四提供的基于下行参考信号的时间同步方法的流程图;
图8为下行参考信号组的第一周期和第二周期的示意图;
图9为本申请实施例五提供的基于下行参考信号的时间同步方法的流程图;
图10为本申请实施例六提供的一种基于下行参考信号的时间同步装置的结构示意图;
图11为本申请实施例八提供的一种基于下行参考信号的时间同步装置的结构示意图;
图12为本申请实施例九提供的一种基于下行参考信号的时间同步装置的结构示意图;
图13为本申请实施例十提供的一种基于下行参考信号的时间同步装置的结构示意图;
图14为本申请实施例十四提供的一种基于下行参考信号的时间同步装置的结构示意图;
图15为本申请实施例十五提供的一种基于下行参考信号的时间同步装置的结构示意图。
具体实施方式
图1为本申请实施例适用的一种通信系统的示意图,如图1所示,该通信系统包括:核心网设备、接入网设备和至少一个终端设备。终端设备通过无线的方式与接入 网设备连接,接入网设备通过无线或有线方式与核心网设备连接。核心网设备与接入网设备可以是独立的、不同的物理设备,也可以是将核心网设备的功能与接入网设备的逻辑功能集成在同一个物理设备上,还可以是一个物理设备上集成了部分核心网设备的功能和部分无线接入网设备的功能。终端设备可以是固定位置的,也可以是可移动的。图1只是示意图,该通信系统中还可以包括其它网络设备,如还可以包括无线中继设备和无线回传设备。
接入网设备可以是全球移动通讯(Global System of Mobile communication,GSM)系统或码分多址(Code Division Multiple Access,CDMA)系统的基站(Base Transceiver Station,BTS),也可以是宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统中的基站(NodeB,NB),还可以是长期演进(Long Term Evolution,LTE)系统中的演进型基站(evolved NodeB,eNB)、接入点(access point,AP)或者中继站,也可以是第五代移动通信(5 Generation,5G)系统中的基站(如gNB或传输点(Transmission Point,TRP))等,还可以是云无线接入网络(Cloud Radio Access Network,CRAN)场景下的无线控制器以及可穿戴设备或车载设备等,在此不作限定。5G系统也称为新无线通信系统、新接入技术(New Radio)或者下一代移动通信系统。
本申请中提到的终端设备也可以称为终端(Terminal)、用户设备(user equipment,UE)、移动台(mobile station,MS)、移动终端(mobile terminal,MT)等。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)中的无线终端等等。
无线接入网设备和终端设备可以部署在陆地上,包括室内或室外、手持或车载;也可以部署在水面上;还可以部署在空中的飞机、气球和卫星上。本申请的实施例对无线接入网设备和终端设备的应用场景不做限定。
图2为本申请实施例一提供的基于下行参考信号的时间同步方法的流程图,如图2所示,本实施例提供的方法包括以下步骤:
步骤S101、终端设备接收接入网设备发送的多个下行参考信号组的配置信息。
该多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,该下行参考信号用于时间同步。该下行参考信号可以为跟踪参考信号(Tracing reference signal,TRS),现有技术中TRS通常用于终端设备的位置跟踪,本申请实施例中TRS还可以用于时间同步,本申请实施例中不对该用于时间同步的下行参考信号的名称进行限定,该下行参考信号还可以称为用于进行跟踪的信道状态信息参考信号((Channel state information-Reference signal,CSI-RS)for tracing)。
下行参考信号组也称为下行参考信号簇或者下行参考信号突发(burst),每个下行参考信号组的配置信息包括组内的下行参考信号的时频资源的信息,可选的,该配置信息中还包括下行参考信号的带宽信息,下行参考信号组的配置信息可以通过高层信令配置,例如,无线资源控制(Radio Resource Control,RRC)信令或媒体接入控 制控制元素(Media Access Control Control element,MAC CE)。
步骤S102、终端设备根据该配置信息,在相同或者K个相邻的时间单元内接收接入网设备发送的该多个下行参考信号组。
该多个下行参考信号组在相同的或者K个相邻的时间单元内发送,该时间单元可以为子帧或者时隙(slot)或者其他时间单位,K大于1且小于或者等于多个下行参考信号组包括的下行参考的总数。当每个下行参考信号组包括的下行参考信号的个数相同,且每个下行参考信号组占用的时间单元个数相同时,K=下行参考信号组的个数*每个下行参考信号组占用的时间单元个数,其中,每个下行参考信号组占用的时间单元个数最少为一个,每个下行参考信号组占用的时间单元个数最多为该下行参考信号组包括的下行参考信号的个数。当每个下行参考信号组占用的时间单元个数为该下行参考信号组包括的下行参考信号的个数(即每个下行参考信号占用一个时间单元)时,K等于多个下行参考信号组包括的下行参考的总数。当然,每个下行参考信号组包括的下行参考信号的个数也可能不同,并且每个下行参考信号组占用的时间单元个数也可能不相同,此时,需要将多个下行参考信号组占用的时间单元个数加起来得到K值。
其中,该多个下行参考信号组均为周期性下行参考信号;或者,该多个下行参考信号组均为非周期性下行参考信号;或者,该多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。该多个下行参考信号组占用不同的时频资源,当该多个下行参考信号组在相同的时间单元内发送时,该多个下行参考信号组占用该时间单元内不同的时频资源,当该多个下行参考信号组在K个相邻的时间单元内发送时,该多个下行参考信号组可以在K个相邻时间单元的相同或者不同的时频资源内发送。
以多个下行参考信号组在相同的子帧内(或者两个相邻时隙内)发送,每个下行参考信号组包括至少两个下行参考信号为例,且该多个下行参考信号组均为周期性下行参考信号,则该多个下行参考信号组的时域配置信息为:每个下行参考信号组中的下行参考信号占用的时域符号的序号,该多个下行参考信号组的频域的配置信息可以为相邻下行参考信号的子载波间隔数,该多个下行参考信号组占用的带宽可以为一个或多个资源块(Resource Block,RB),一个RB在时域上占用一个时隙,在频域上占用一个12个子载波,该多个下行参考信号组在频域上占用的RB与子载波间隔(subcarrier spacing,SCS),SCS可以为15KHZ、30KHZ或者60KHZ等。
以3个下行参考信号组为例,该3个下行参考信号组在相同的子帧内发送,每个下行参考信号组包括两个下行参考信号,且该3个下行参考信号组均为周期性下行参考信号,示例性的,一个子帧包括12或14个时域符号,则该3个下行参考信号组的时域资源的配置信息可以为:{4,8},{5,9},{6,10},其中,{4,8}表示第一个下行参考信号组包括的两个下行参考信号占用的时域符号为4和8,{5,9}表示第二个下行参考信号组包括的两个下行参考信号占用的时域符号为5和9,{6,10}表示第三个下行参考信号组包括的两个下行参考信号占用的时域符号为6和10。假设相邻下行参考信号的子载波间隔数为4,则在频域上只需要保证相邻下行参考信号的子载波间隔为4个子载波,该3个下行参考信号组占用的时频资源共有4(频域)*3(时域)=12种组合。
该多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号时, 对于周期性下行参考信号,可以按照上述配置方法进行配置。
当该多个下行参考信号组均为非周期性下行参考信号,或者,该多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号时,对于非周期性下行参考信号,接入网设备可以单独配置每个下行参考信号的时域资源和频域资源,非周期下行参考信号的时域资源可以是非周期下行参考信号占用的时域符号、时隙或者子帧,非周期下行参考信号的频域资源可以是非周期下行参考信号占用的子载波。
可选的,本实施例中可以对低频和高频分别配置时域资源和频域资源,也可以对高频和低频配置相同的时域资源和频域资源。
图3为下行参考信号组的时频资源的一种示意图,如图3所示,3个下行参考信号组在一个子帧内发送,在频域上占用12个子载波,一个子帧包括12个或14个时域符号。下行参考信号组1在时域上占用符号4(符号从0开始编号)和符号8,下行参考信号组1在频域上占用子载波0(子载波从0开始编号)、子载波4和子载波8。下行参考信号组2在时域与下行参考信号组1占用相同的符号,下行参考信号组1在频域上占用子载波2、子载波6和子载波10。下行参考信号组3在时域上占用符号6和符号10,下行参考信号组3在频域上与下行参考信号组1占用相同的子载波。图3中3个下行参考信号组都是周期性下行参考信号。
图4为下行参考信号组的时频资源的另一种示意图,如图4所示,两个下行参考信号组在两个相邻子帧内发送,在频域上占用12个子载波,一个子帧包括12个或14个时域符号。下行参考信号组1在时域上占用符号4(符号从0开始编号)和符号8,下行参考信号组1在时域上占用子帧X的符号4和符号8,在频域上占用子载波0、子载波4和子载波8,下行参考信号组2在时域上占用子帧X+1的符号4和符号8,下行参考信号组2在频域上占用子载波0、子载波4和子载波8。两个下行参考信号组在时域上占用了相同的符号,在频域上占用了相同的子载波。
步骤S103、终端设备根据预设的合并规则或者接入网设备发送的合并指示信息,从多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
一种方式中,合并指示信息包括第一指示信息,该第一指示信息用于指示将多个下行参考信号组中全部下行参考信号组进行合并检测。相应的,终端设备根据该第一指示信息,对多个下行参考信号组中全部下行参考信号组进行合并检测,得到同步信息。
其中,合并检测可以将多个下行参考组在频域或者时域上进行叠加,由于多个下行参考组在相同或者K个相邻的时间单元内发送,因此,用于合并检测的下行参考信号在时域上的间隔较小,实际经验表明10ms范围内时间同步检测结果相关性较强,达到20ms后,二者检测结果相差可能达到10Ts(330ns)以上,通过多次合并会导致同步信息误差较大。而本实施例中,可以保证用于合并检测的多个下行参考信号组位于10ms内,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。
另一种方式中,合并指示信息包括:待合并的下行参考信号组的周期信息。该多个下行参考信号组的周期可能互不不同,或者,部分下行参考信号组的周期相同,剩 余下行参考信号组的周期不同,通过合并指示信息指示将某个周期或某几个周期的下行参考信号组进行合并。相应的,终端设备根据待合并的下行参考信号组的周期信息,以及该多个下行参考信号组的周期信息,从该多个下行参考信号组中确定与待合并的下行参考信号组的周期相同的下行参考信号组为待合并的下行信号组,对待合并的下行参考信号组进行合并检测,得到同步信息。
例如,共有4个下行参考信号组,下行参考信号组1和3的周期为T1,下行参考信号组2的周期为T2,下行参考信号组4的周期为T3。该合并指示信息可以为T1,则终端设备收到该合并指示信息后,将下行参考信号组1和下行参考信号组3进行合并检测。该合并指示信息还可以为T2和T3,则终端设备收到该合并指示信息后,将下行参考信号组2和下行参考信号组4进行合并检测。该合并指示信息还可以为T1、T2和T3,则终端设备收到该合并指示信息后,将下行参考信号组1、2、3、4进行合并检测。
又一种方式中,该合并指示信息包括:待合并的下行参考信号组的起始时间的信息和待合并的下行参考信号组的个数N。相应的,终端设备根据待合并的下行参考信号组的起始时间的信息和待合并的下行参考信号组的个数N,从待合并的下行参考信号组的起始时间开始,从多个下行参考信号组中确定连续的N个下行参考信号组为待合并的下行参考信号组,对待合并的下行参考信号组进行合并检测,得到同步信息。
待合并的下行参考信号组的起始时间的信息可以为待合并的下行参考信号组的起始符号,即将某个符号开始的下行参考信号组进行合并。该合并指示信息中还可以不包括待合并的下行参考信号组的个数N,待合并的下行参考信号组的个数N可以预先规定好。在可能的实现方式中,该合并指示信息还可以包括待合并的下行参考信号组的起始时间的信息和结束时间的信息,终端设备将起始时间和结束时间内的所有下行参考信号组进行合并。
再一种方式中,该合并指示信息包括待合并的下行参考信号组的索引信息,该方式需要为多个下行参考信号组中的每个下行参考信号组设置一个索引,如基站为参考信号配置的资源索引(Resource ID)等。相应的,终端设备根据待合并的下行参考信号组的索引信息,从多个下行参考信号组中确定该索引信息对应的下行参考信号组为待合并的下行参考信号组,对待合并的下行参考信号组进行合并检测,得到同步信息。
例如,共有4个下行参考信号组,索引分别为1、2、3、4,那么该指示信息可以携带4个索引中的任意两个索引、任意3个索引或者4个索引。
上述四种方式中,都需要接入网设备发送合并指示信息指示终端设备对多个下行参考信号组中哪些下行参考信号组进行合并。在本实施例的另一种实现方式,合并规则预先设备在终端设备中,不需要接入网设备指示。示例性的,终端设备根据预设的待合并的下行参考信号组的个数N,从接收到的多个下行参考信号组中确定N个下行参考信号组为待合并的下行信号组,对待合并的下行参考信号组进行合并检测,得到同步信息。N的取值小于或等于接入网设备配置的多个下行参考信号组的个数,例如,接入网设备为终端设备配置了4个下行参考信号组,当N的取值等于4时,终端设备将所有下行参考信号组进行合并。当N的取值小于4时,终端设备可以按照时域顺序或者频域顺序依次选择N个下行参考信号组进行合并。例如,终端设备按照时域符号 由小到达选择N个下行参考信号组,或者,按照频域由低到高选择N个下行参考信号组。
或者,终端设备从接收到多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组,对待合并的下行参考信号组进行合并检测,得到同步信息。
本实施例中,终端设备接收接入网设备发送的多个下行参考信号组的配置信息,多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,在相同的或者K个相邻的时间单元内接收接入网设备发送的多个下行参考信号组,根据预设的合并规则或者接入网设备发送的合并指示信息,从多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。由于多个下行参考组在相同的或者K个相邻的时间单元内发送,因此,用于合并检测的下行参考信号在时域上的间隔较小,可以保证用于合并检测的多个下行参考信号组位于10ms内,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。
图5为本申请实施例二提供的基于下行参考信号的时间同步方法的信令流程图,如图5所示,本实施例提供的方法包括以下步骤:
步骤S201、接入网设备向终端设备发送多个下行参考信号组的配置信息。
该多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,该下行参考信号用于时间同步,该多个下行参考信号组的配置信息包括下行参考信号组的时频资源的信息,可选的,该配置信息中还包括下行参考信号的带宽信息。该多个下行参考信号组均为周期性下行参考信号,或者,该多个下行参考信号组均为非周期性下行参考信号,或者,该多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
步骤S202、接入网设备根据多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送多个下行参考信号组。
K大于1且小于或者等于多个下行参考信号组包括的下行参考信号的总数,多个下行参考信号组占用不同的时频资源。
步骤S203、接入网设备向终端设备发送合并指示信息。
其中,该合并指示信息包括第一指示信息,该第一指示信息用于指示将多个下行参考信号组中的全部下行参考信号组进行合并检测。或者,该合并指示信息包括:待合并的下行参考信号组的周期信息。或者,该合并指示信息包括:待合并的下行参考信号组的个数N和待合并的下行参考信号组的起始时间的信息。或者,该合并指示信息包括:待合并的下行参考信号组的索引信息。
步骤S204、终端设备根据该合并指示信息,从多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
本实施例的具体实现方式,参照实施例一的相关描述,这里不再赘述。
本实施例中,接入网设备通过为终端设备配置多个下行参考信号组,在相同的或者K个相邻的时间单元上发送该多个下行参考信号组,并向终端设备发送合并指示信息,指示终端设备从多个下行参考信号组中选择全部或者部分下行参考信号组进行合 并检测。由于多个下行参考组在相同的或者K个相邻的时间单元内发送,因此,用于合并检测的下行参考信号在时域上的间隔较小,可以保证用于合并检测的多个下行参考信号组位于10ms内,检测结果相关性较强,通过对多个下行参考信号组进行合并检测,提高了终端设备的同步精度。
实施例一和实施例二方案中,通过对相同或K个相邻的时间单元上发送的多个下行参考信号组进行合并检测,使得即使接入网设备为终端设备配置的带宽或者部分带宽(Bandwidth part,BWP)不能满足终端做高精度同步的需求,也能够进行高精度同步。例如,在SCS为15KHZ时,现有技术中,下行参考信号的最小带宽为50RB,当下行参考信号的带宽大于或等于50RB时,终端设备才能够进行高精度同步,如果下行参考信号的带宽小于50RB,则得到的同步信息无法满足高精度的需求。需要说明的时,用于进行高精度同步的下行参考信号的最小带宽与SCS有关,当SCS为30KHZ时,用于进行高精度同步的下行参考信号的最小带宽为25RB。本申请实施例中,如果下行参考信号的带宽能够满足终端做高精度同步的需求,则采用现有技术的方法进行同步,如果下行参考信号的带宽不满足终端做高精度同步的需求,则通过实施例一和实施例二方法进行同步。
本申请实施三提供另一种时间同步方法,图6为本申请实施例三提供的时间同步的确定方法的流程图,如图6所示,本实施例提供的方法包括以下步骤:
步骤S301、终端设备接收接入网设备发送的下行参考信号的带宽信息,该下行参考信号用于时间同步。
步骤S302、当下行参考信号的带宽小于最小带宽时,终端设备不进行时间同步。
该最小带宽是预先设置的,或者,终端设备根据信道质量测量得到的。示例性,终端设备上预先配置了信道质量和带宽的映射关系,该信道质量可以为信噪比(signal noise ratio,SNR),该映射关系例如为:SNR<-5dB,带宽大于50RB;SNR<0dB,带宽大于25RB。终端设备通过测量当前的信道质量,根据当前的信道质量和该映射关系,确定下行参考信号的带宽。可选的,下行参考信号的带宽还可以是接入网设备根据终端设备的信道质量,给终端设备配置的最小带宽。
该最小带宽与SCS有关,当SCS为30KHZ时,该最小带宽为25RB,当SCS为15KHZ时,该最小带宽为50RB。本实施例中,当下行参考信号的带宽小于最小带宽时,终端设备不进行时间同步,或者,说对于需要高精度同步的终端设备不期望下行参考信号的带宽小于最小带宽,避免了终端设备进行无效的或者不满足精度的同步操作,不仅防止终端设备发生同步错误,节省了终端设备的处理资源。
图7为本申请实施例四提供的基于下行参考信号的时间同步方法的流程图,不同于实施例一的方法,本实施例中接入网设备只需要为终端设备配置一个下行参考信号组,如图7所示,本实施例提供的方法包括以下步骤:
步骤S401、终端设备接收接入网设备发送的下行参考信号组的第一周期信息以及下行参考信号组内的下行参考信号的第二周期信息。
该第一周期大于第二周期,该下行参考信号组包括至少两个下行参考信号,该下行参考信号用于时间同步。第一周期为下行参考信号组的周期,第一周期也可以称为同步周期,第一周期的信息可以为相邻两个下行参考信号组的起始时间的间隔,也可以为结束时间的间隔,还可以为前一个下行参考信号组的结束时间与后一个下行参考信号组的起始时间的间隔。
根据终端设备的时间漂移误差,进行高精度时间同步的同步周期大概在100ms量级即可,如果在两次同步周期之间,接入网设备仍然按照现有的下行参考信号的周期(m_period)来发送下行参考信号可能造成时频资源浪费,该m_period的取值大于或等于10ms,假设m_period等于10ms,则在100ms的同步周期内,接入网设备每间隔10ms发送一次下行参考信号,导致资源浪费。
本实施例中,本实施例中为该下行参考信号组内的下行参考信号配置了第二周期,该下行参考信号组内包括至少两个下行参考信号,该第二周期可以为:相邻下行参考信号的起始时间的间隔,或者相邻下行参考信号的结束时间的间隔,或者,前一个下行参考信号的结束时间与后一个下行参考信号的开始时间的间隔。该第二周期小于10ms,该第二周期例如为1ms、2ms等。
图8为下行参考信号组的第一周期和第二周期的示意图,如图8所示,下行参考信号组的第一周期为相邻两个下行参考信号组的起始时间的间隔,第一周期为100ms,该下行参考信号组包括两个下行参考信号,第二周期为相邻下行参考信号的起始时间的间隔,第二周期为2ms。
示例性的,接入网设备通过高层信令(如RRC消息)发送第二周期信息,通过动态控制信令发送第一周期信息,该动态控制信息可以为下行控制信息(Down control information,DCI)。当然,第一周期信息和第二周期信息都可以通过高层信令发送。可选的,第一周期信息还可以为下行参考信号组的起始时间和/或结束时间。其中,起始时间和结束时间可以通过一条信令携带,也可以通过两条信令携带。
步骤S402、终端设备接收接入网设备根据第一周期信息和第二周期信息发送的下行参考信号组。
接入网设备根据第一周期信息和第二周期信息向终端设备发送该下行参考信号组。
步骤S403、终端设备将下行参考信号组内的下行参考信号进行合并检测,得到同步信息。
本实施例中,终端设备接收接入网设备发送的下行参考信号组的第一周期信息以及下行参考信号组内的下行参考信号的第二周期信息,第一周期大于第二周期,下行参考信号组包括至少两个下行参考信号,终端设备接收接入网设备根据第一周期信息和第二周期信息发送的下行参考信号组,将下行参考信号组内的下行参考信号进行合并检测,得到同步信息。由于下行参考信号组内下行参考信号的第二周期小于10ms,合并检测结果相关性较强,通过对下行参考信号组内的多个下行参考信号进行合并检测,提高了终端设备的同步精度。
图9为本申请实施例五提供的基于下行参考信号的时间同步方法的流程图,如图9所示,本实施例提供的方法包括以下步骤:
步骤S501、终端设备接收接入网设备发送的下行参考信号,以及下行参考信号的 用途指示信息。
该下行参考信号的用途指示信息用于指示终端设备进行位置跟踪和/或时间同步。该用途指示信息可以通过RRC信令,如在NZP-CSI-RS-ResourceSet information element信令中增加一个指示信息实现,也可以通过增加一个新的IE(information element)来指示。
步骤S502、终端设备根据该下行参考信号的用途指示信息,使用下行参考信号进行位置跟踪和/或时间同步。
需要说明的是,该下行参考信号的用途指示信息可以单独指示,也可以与下行参考信号的带宽信息和周期信息一起指示。另外,实施例五的方法可以单独使用,也可以与实施例一、实施例二、实施例四结合使用。当实施例五的方法与实施例一、实施例二结合使用时,接入网设备会向终端设备发送下行参考信号组的用途指示信息,下行参考信号的用途指示信息可以与下行参考信号组的配置信息一起指示,也可以与下行参考信号组的带宽信息一起指示,下行参考信号组的用途指示信息也可以单独指示。如果下行参考信号的用途指示信息指示的用途为时间同步,或者,位置跟踪和时间同步时,终端设备使用实施例一的方法进行时间同步。
当实施例五的方法与实施例四结合使用时,接入网设备可以将下行参考信号的用途指示信息与第一周期信息和/或第二周期信息通过一条信令指示,也可以通过多条信令单独指示。如果下行参考信号的用途指示信息指示的用途为时间同步,则终端设备使用实施例四的方法进行时间同步。
图10为本申请实施例六提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置可以应用在终端设备中,如图10所示,该装置包括:
接收模块11,用于接收接入网设备发送的多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,所述下行参考信号用于时间同步;
所述接收模块11,还用于根据所述配置信息,在相同的或者K个相邻的时间单元内接收所述接入网设备发送的所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
同步模块12,用于根据预设的合并规则或者所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
在一个示例中,所述同步模块12具体用于:当所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中全部下行参考信号组进行合并检测时,根据所述第一指示信息,对所述多个下行参考信号组中全部下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述同步模块12具体用于:当所述合并指示信息包括待合并的下行参考信号组的周期信息时,根据所述待合并的下行参考信号组的周期信息,以及所述多个下行参考信号组的周期信息,从所述多个下行参考信号组中确定与所述待合 并的下行参考信号组的周期相同的下行参考信号组为所述待合并的下行信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述同步模块12具体用于:当所述合并指示信息包括待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N时,根据所述待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N,从所述待合并的下行参考信号组的起始时间开始,从所述多个下行参考信号组中确定连续的N个下行参考信号组为所述待合并的下行参考信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述同步模块12具体用于:当所述合并指示信息包括待合并的下行参考信号组的索引信息时,根据所述待合并的下行参考信号组的索引信息,从所述多个下行参考信号组中确定所述索引信息对应的下行参考信号组为所述待合并的下行参考信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述同步模块12具体用于:根据预设的待合并的下行参考信号组的个数N,从接收到的所述多个下行参考信号组中确定N个下行参考信号组为所述待合并的下行信号组;或者,所述终端设备从接收到所述多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,所述多个下行参考信号组均为非周期性下行参考信号;或者,所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本实施例提供的装置,可用于执行实施例一和实施例二中终端设备执行的方法步骤,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例七提供一种基于下行参考信号的时间同步装置,所述装置可以应用在接入网设备中,所述装置包括:
发送模块,用于向终端设备发送多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,所述下行参考信号用于时间同步;
所述发送模块,还用于根据所述多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述发送模块,还用于向所述终端设备发送合并指示信息。
在一个示例中,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中的全部下行参考信号组进行合并检测;或者,
所述合并指示信息包括:待合并的下行参考信号组的周期信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的个数N和所述待合并的下行参考信号组的起始时间的信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的索引信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,
所述多个下行参考信号组均为非周期性下行参考信号;或者,
所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本实施例提供的装置,可用于执行实施例一和实施例二中接入网设备执行的方法步骤,具体实现方式和技术效果类似,这里不再赘述。
图11为本申请实施例八提供的一种时间同步的确定装置的结构示意图,所述装置可以应用在终端设备中,如图11所示,该装置包括:
接收模块21,用于接收接入网设备发送的下行参考信号的带宽信息,所述下行参考信号用于时间同步;
同步模块22,用于当所述下行参考信号的带宽小于最小带宽时,不进行时间同步。
在一个示例中,所述最小带宽是预先设置的,或者,所述终端设备根据信道质量测量得到的。
本实施例提供的终端设备可用于执行实施例三的方法,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例九提供的一种时间同步的确定装置的结构示意图,所述装置可以应用在接入网设备中,该装置包括:发送模块,用于向终端设备发送下行参考信号的带宽信息,所述下行参考信号用于时间同步。
图12为本申请实施例十提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置可以应用在终端设备中,如图12所示,所述装置包括:
接收模块31,用于接收接入网设备发送的下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述接收模块31,还用于接收所述接入网设备根据所述第一周期信息和所述第二周期信息发送的下行参考信号组;
同步模块32,用于将所述下行参考信号组内的下行参考信号进行合并检测,得到同步信息。
在一个示例中,所述接收模块31具体用于:
接收所述接入网设备通过高层信令发送的所述第二周期信息;
接收所述接入网设备通过下行控制信息携带的所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
本实施例提供的装置可用于执行实施例四中终端设备执行的方法,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例十一提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置可以应用在接入网设备中,该装置包括:
发送模块,用于向终端设备发送下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述发送模块,还用于根据所述第一周期信息和所述第二周期信息向所述终端设 备发送所述下行参考信号组。
在一个示例中,所述发送模块具体用于:
通过高层信令向所述终端设备发送所述第二周期信息;
通过下行控制信息向所述终端设备发送所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
图13为本申请实施例十二提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置可以应用在终端设备中,如图13所示,所述装置包括:
接收模块41,用于接收接入网设备发送的下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步;
处理模块42,用于根据所述下行参考信号的用途指示信息,使用所述下行参考信号进行位置跟踪和/或时间同步。
本实施例提供的装置可用于执行实施例五中终端设备执行的方法,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例十三提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置可以应用在接入网设备中,该装置包括:
发送模块,用于向终端设备发送下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步。
图14为本申请实施例十四提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置应用在终端设备中,如图14所示,所述装置包括:处理器51、存储器52和收发器53,所述存储器52用于存储指令,所述收发器53用于和其他设备通信,所述处理器51用于执行所述存储器52中存储的指令,具体的:
所述收发器53,用于接收接入网设备发送的多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,所述下行参考信号用于时间同步;
所述收发器53,用于根据所述配置信息,在相同的或者K个相邻的时间单元内接收所述接入网设备发送的所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述处理器51,用于根据预设的合并规则或者所述接入网设备发送的合并指示信息,从所述收发器53接收的多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
在一个示例中,所述处理器51具体用于:当所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中全部下行参考信号组进行合并检测时,根据所述第一指示信息,对所述多个下行参考信号组中全部下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器51具体用于:当所述合并指示信息包括:待合并的 下行参考信号组的周期信息时,根据所述待合并的下行参考信号组的周期信息,以及所述多个下行参考信号组的周期信息,从所述多个下行参考信号组中确定与所述待合并的下行参考信号组的周期相同的下行参考信号组为所述待合并的下行信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器51具体用于:当所述合并指示信息包括:待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N时,根据所述待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N,从所述待合并的下行参考信号组的起始时间开始,从所述多个下行参考信号组中确定连续的N个下行参考信号组为所述待合并的下行参考信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器51具体用于:当所述合并指示信息包括待合并的下行参考信号组的索引信息时,根据所述待合并的下行参考信号组的索引信息,从所述多个下行参考信号组中确定所述索引信息对应的下行参考信号组为所述待合并的下行参考信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述处理器51具体用于:根据预设的待合并的下行参考信号组的个数N,从接收到的所述多个下行参考信号组中确定N个下行参考信号组为所述待合并的下行信号组;或者,所述终端设备从接收到所述多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组;对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,所述多个下行参考信号组均为非周期性下行参考信号;或者,所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本实施例提供的装置,可用于执行实施例一和实施例二中终端设备执行的方法步骤,具体实现方式和技术效果类似,这里不再赘述。
图15为本申请实施例十五提供的一种基于下行参考信号的时间同步装置的结构示意图,所述装置应用在接入网设备中,如图15所示,所述装置包括:处理器61、存储器62和收发器63,所述存储器62用于存储指令,所述收发器63用于和其他设备通信,所述处理器61用于执行所述存储器62中存储的指令,具体的:
所述收发器63,用于向终端设备发送多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,所述下行参考信号用于时间同步;
所述收发器63,用于根据所述多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
所述收发器63,用于向所述终端设备发送合并指示信息。
在一个示例中,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中的全部下行参考信号组进行合并检测;或者,
所述合并指示信息包括:待合并的下行参考信号组的周期信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的个数N和所述待合并的下行参考信号组的起始时间的信息;或者,
所述合并指示信息包括:待合并的下行参考信号组的索引信息。
在另一个示例中,所述多个下行参考信号组均为周期性下行参考信号;或者,
所述多个下行参考信号组均为非周期性下行参考信号;或者,
所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
本实施例提供的接入网设备,可用于执行实施例一和实施例二中接入网设备执行的方法步骤,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例十六提供一种终端设备,该终端设备的结构参照图14所示,具体的:
所述收发器53,用于接收接入网设备发送的下行参考信号的带宽信息,所述下行参考信号用于时间同步;
所述处理器51,用于当所述下行参考信号的带宽小于最小带宽时,不进行时间同步。
在一个示例中,所述最小带宽是预先设置的,或者,所述终端设备根据信道质量测量得到的。
本实施例提供的终端设备可用于执行实施例三的方法,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例十七提供一种接入网设备,该接入网设备的结构参照图15所示,具体的:所述收发器63,用于向终端设备发送下行参考信号的带宽信息,所述下行参考信号用于时间同步。
本申请实施例十八提供一种终端设备,该终端设备的结构参照图14所示,具体的:
收发器53,用于接收接入网设备发送的下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
收发器53,还用于接收所述接入网设备根据所述第一周期信息和所述第二周期信息发送的下行参考信号组;
处理器51,用于将所述下行参考信号组内的下行参考信号进行合并检测,得到同步信息。
在一个示例中,所述收发器53具体用于:
接收所述接入网设备通过高层信令发送的所述第二周期信息;
接收所述接入网设备通过下行控制信息携带的所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
本实施例提供的终端设备可用于执行实施例四的方法,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例十九提供一种接入网设备,该接入网设备的结构参照图15所示,具体的:
收发器63,用于向终端设备发送下行参考信号组的第一周期信息以及所述下行参考信号组内的下行参考信号的第二周期信息,所述第一周期大于所述第二周期,所述 下行参考信号组包括至少两个下行参考信号,所述下行参考信号用于时间同步;
所述收发器63,还用于根据所述第一周期信息和所述第二周期信息向所述终端设备发送所述下行参考信号组。
在一个示例中,所述收发器63具体用于:
通过高层信令向所述终端设备发送所述第二周期信息;
通过下行控制信息向所述终端设备发送所述第一周期信息。
在另一个示例中,所述第一周期信息包括所述下行参考信号组的起始时间和/或结束时间。
本申请实施例二十提供一种终端设备,该终端设备的结构参照图14所示,具体的:
收发器53,用于接收接入网设备发送的下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步;
处理器51,用于根据所述下行参考信号的用途指示信息,使用所述下行参考信号进行位置跟踪和/或时间同步。
本实施例提供的终端设备可用于执行实施例五的方法,具体实现方式和技术效果类似,这里不再赘述。
本申请实施例二十一提供一种接入网设备,该接入网设备的结构参照图15所示,具体的:
所述收发器63,用于向终端设备发送下行参考信号,以及所述下行参考信号的用途指示信息,所述下行参考信号的用途指示信息用于指示所述终端设备进行位置跟踪和/或时间同步。
本申请实施例二十二提供一种计算机可读存储介质,所述计算机可读存储介质存储有指令,当所述指令被执行时,使得计算机执行如本申请上述实施例中终端设备执行的方法。
本申请实施例二十三提供一种计算机可读存储介质,所述计算机可读存储介质存储有指令,当所述指令被执行时,使得计算机执行如本申请上述实施例中接入网设备执行的方法。
上述各个实施例中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。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。结合本发明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单元组合执行完成。软件单元可以位于随机存取存储器(random access memory,RAM)、闪存、只读存储器(read-only memory,ROM)、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指令,结合其硬件完成上述方法的步骤。
在本申请所提供的几个实施例中,应该理解到,所揭露的装置和方法,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。上述集成的单元既可以采用硬件的形式实现,也可以采用硬件加软件功能单元的形式实现。

Claims (24)

  1. 一种通信方法,其特征在于,包括:
    终端设备接收接入网设备发送的多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,所述下行参考信号用于时间同步;
    所述终端设备根据所述配置信息,在相同的或者K个相邻的时间单元内接收所述接入网设备发送的所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
    所述终端设备根据预设的合并规则或者所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
  2. 根据权利要求1所述的方法,其特征在于,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中全部下行参考信号组进行合并检测;
    所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
    所述终端设备根据所述第一指示信息,对所述多个下行参考信号组中全部下行参考信号组进行合并检测,得到所述同步信息。
  3. 根据权利要求1所述的方法,其特征在于,所述合并指示信息包括:待合并的下行参考信号组的周期信息;
    所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
    所述终端设备根据所述待合并的下行参考信号组的周期信息,以及所述多个下行参考信号组的周期信息,从所述多个下行参考信号组中确定与所述待合并的下行参考信号组的周期相同的下行参考信号组为所述待合并的下行信号组;
    所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  4. 根据权利要求1所述的方法,其特征在于,所述合并指示信息包括:待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N;
    所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
    所述终端设备根据所述待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N,从所述待合并的下行参考信号组的起始时间开始,从所述多个下行参考信号组中确定连续的N个下行参考信号组为所述待合并的下行参考信号组;
    所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  5. 根据权利要求1所述的方法,其特征在于,所述合并指示信息包括待合并的下行参考信号组的索引信息;
    所述终端设备根据所述接入网设备发送的合并指示信息,从所述多个下行参考信 号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
    所述终端设备根据所述待合并的下行参考信号组的索引信息,从所述多个下行参考信号组中确定所述索引信息对应的下行参考信号组为所述待合并的下行参考信号组;
    所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  6. 根据权利要求1所述的方法,其特征在于,所述终端设备根据预设的合并规则,从接收到的所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息,包括:
    所述终端设备根据预设的待合并的下行参考信号组的个数N,从接收到的所述多个下行参考信号组中确定N个下行参考信号组为所述待合并的下行信号组;或者,所述终端设备从接收到所述多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组;
    所述终端设备对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  7. 根据权利要求1-6任一项所述的方法,其特征在于,
    所述多个下行参考信号组均为周期性下行参考信号;或者,
    所述多个下行参考信号组均为非周期性下行参考信号;或者,
    所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
  8. 一种通信方法,其特征在于,包括:
    接入网设备向终端设备发送多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,所述下行参考信号用于时间同步;
    所述接入网设备根据所述多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
    所述接入网设备向所述终端设备发送合并指示信息。
  9. 根据权利要求8所述的方法,其特征在于,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中的全部下行参考信号组进行合并检测;或者,
    所述合并指示信息包括:待合并的下行参考信号组的周期信息;或者,
    所述合并指示信息包括:待合并的下行参考信号组的个数N和所述待合并的下行参考信号组的起始时间的信息;或者,
    所述合并指示信息包括:待合并的下行参考信号组的索引信息。
  10. 根据权利要求8或9所述的方法,其特征在于,所述多个下行参考信号组均为周期性下行参考信号;或者,
    所述多个下行参考信号组均为非周期性下行参考信号;或者,
    所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
  11. 一种通信装置,其特征在于,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
    所述收发器,用于接收接入网设备发送的多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,其中,所述下行参考信号用于时间同步;
    所述收发器,用于根据所述配置信息,在相同的或者K个相邻的时间单元内接收所述接入网设备发送的所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
    所述处理器,用于根据预设的合并规则或者所述接入网设备发送的合并指示信息,从所述收发器接收的所述多个下行参考信号组中选择全部或者部分下行参考信号组进行合并检测,得到同步信息。
  12. 根据权利要求11所述的装置,其特征在于,所述处理器具体用于:
    在所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中全部下行参考信号组进行合并检测时,根据所述第一指示信息,对所述多个下行参考信号组中全部下行参考信号组进行合并检测,得到所述同步信息。
  13. 根据权利要求11所述的装置,其特征在于,所述处理器具体用于:
    在所述合并指示信息包括待合并的下行参考信号组的周期信息时,根据所述待合并的下行参考信号组的周期信息,以及所述多个下行参考信号组的周期信息,从所述多个下行参考信号组中确定与所述待合并的下行参考信号组的周期相同的下行参考信号组为所述待合并的下行信号组;
    对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  14. 根据权利要求11所述的装置,其特征在于,所述处理器具体用于:
    在所述合并指示信息包括待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N时,根据所述待合并的下行参考信号组的起始时间的信息和所述待合并的下行参考信号组的个数N,从所述待合并的下行参考信号组的起始时间开始,从所述多个下行参考信号组中确定连续的N个下行参考信号组为所述待合并的下行参考信号组;
    对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  15. 根据权利要求11所述的装置,其特征在于,所述处理器具体用于:
    所述合并指示信息包括待合并的下行参考信号组的索引信息,根据所述待合并的下行参考信号组的索引信息,从所述多个下行参考信号组中确定所述索引信息对应的下行参考信号组为所述待合并的下行参考信号组;
    对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  16. 根据权利要求11所述的装置,其特征在于,所述处理器具体用于:
    根据预设的待合并的下行参考信号组的个数N,从接收到的所述多个下行参考信号组中确定N个下行参考信号组为所述待合并的下行信号组;或者,所述终端设备从接收到所述多个下行参考信号组中,确定带宽相同和/或资源块相同的下行参考信号组为待合并的下行信号组;
    对所述待合并的下行参考信号组进行合并检测,得到所述同步信息。
  17. 根据权利要求11-16任一项所述的装置,其特征在于,
    所述多个下行参考信号组均为周期性下行参考信号;或者,
    所述多个下行参考信号组均为非周期性下行参考信号;或者,
    所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
  18. 一种通信装置,其特征在于,包括:处理器、存储器和收发器,所述存储器用于存储指令,所述收发器用于和其他设备通信,所述处理器用于执行所述存储器中存储的指令,具体的:
    所述收发器,用于向终端设备发送多个下行参考信号组的配置信息,所述多个下行参考信号组中每个下行参考信号组包括至少一个下行参考信号,所述下行参考信号用于时间同步;
    所述收发器,用于根据所述多个下行参考信号组的配置信息,在相同的或者K个相邻的时间单元上发送所述多个下行参考信号组,K大于1且小于或者等于所述多个下行参考信号组包括的下行参考信号的总数,所述多个下行参考信号组占用不同的时频资源;
    所述收发器,用于向所述终端设备发送合并指示信息。
  19. 根据权利要求18所述的装置,其特征在于,所述合并指示信息包括第一指示信息,所述第一指示信息用于指示将所述多个下行参考信号组中的全部下行参考信号组进行合并检测;或者,
    所述合并指示信息包括:待合并的下行参考信号组的周期信息;或者,
    所述合并指示信息包括:待合并的下行参考信号组的个数N和所述待合并的下行参考信号组的起始时间的信息;或者,
    所述合并指示信息包括:待合并的下行参考信号组的索引信息。
  20. 根据权利要求18或19所述的装置,其特征在于,所述多个下行参考信号组均为周期性下行参考信号;或者,
    所述多个下行参考信号组均为非周期性下行参考信号;或者,
    所述多个下行参考信号组中包括周期性下行参考信号和非周期性下行参考信号。
  21. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有指令,当所述指令被执行时,使得计算机执行如权利要求1-7任一项所述的方法。
  22. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有指令,当所述指令被执行时,使得计算机执行如权利要求8-10任一项所述的方法。
  23. 一种通信装置,包括处理器,所述处理器与存储器相连,所述存储器用于存储计算机程序,所述处理器用于执行所述存储器中存储的计算机程序,以使得所述装置执行如权利要求1至7中任一项所述的方法。
  24. 一种通信装置,包括处理器,所述处理器与存储器相连,所述存储器用于存储计算机程序,所述处理器用于执行所述存储器中存储的计算机程序,以使得所述装置执行如权利要求8至10中任一项所述的方法。
PCT/CN2019/097818 2018-07-27 2019-07-26 通信方法和装置 WO2020020322A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810848236.9 2018-07-27
CN201810848236.9A CN110768769B (zh) 2018-07-27 2018-07-27 基于下行参考信号的时间同步方法和装置

Publications (1)

Publication Number Publication Date
WO2020020322A1 true WO2020020322A1 (zh) 2020-01-30

Family

ID=69181311

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/097818 WO2020020322A1 (zh) 2018-07-27 2019-07-26 通信方法和装置

Country Status (2)

Country Link
CN (1) CN110768769B (zh)
WO (1) WO2020020322A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113271662B (zh) * 2020-02-14 2023-08-08 展讯通信(上海)有限公司 参考信号的时频资源配置方法、系统、电子设备和介质
CN113853007B (zh) * 2020-06-28 2024-05-10 华为技术有限公司 通信方法及装置
CN115696447B (zh) * 2022-12-30 2023-03-14 成都戎星科技有限公司 一种非公开协议的vsat网终端实现主动发射的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102083194A (zh) * 2009-11-30 2011-06-01 大唐移动通信设备有限公司 时间信息发送与时间同步方法、系统和设备
WO2014112595A1 (ja) * 2013-01-18 2014-07-24 京セラ株式会社 通信制御方法
CN104144504A (zh) * 2013-05-10 2014-11-12 中兴通讯股份有限公司 一种下行参考信号的传输方法、设备及系统
CN105376869A (zh) * 2014-08-22 2016-03-02 中兴通讯股份有限公司 一种在非授权载波上发送发现信号的方法、系统及接入点

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103095631A (zh) * 2011-11-03 2013-05-08 中兴通讯股份有限公司 下行参考信号的发送方法、配置方法和装置
CN103945447B (zh) * 2013-01-18 2019-11-08 北京三星通信技术研究有限公司 一种进行下行信道特性参数测量的方法及用户设备
CN105743626B (zh) * 2014-12-30 2020-09-15 北京三星通信技术研究有限公司 一种下行信道和/或下行参考信号的接收方法和设备
US10531494B2 (en) * 2017-01-17 2020-01-07 Huawei Technologies Co., Ltd. Reference signal scrambling for random access

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102083194A (zh) * 2009-11-30 2011-06-01 大唐移动通信设备有限公司 时间信息发送与时间同步方法、系统和设备
WO2014112595A1 (ja) * 2013-01-18 2014-07-24 京セラ株式会社 通信制御方法
CN104144504A (zh) * 2013-05-10 2014-11-12 中兴通讯股份有限公司 一种下行参考信号的传输方法、设备及系统
CN105376869A (zh) * 2014-08-22 2016-03-02 中兴通讯股份有限公司 一种在非授权载波上发送发现信号的方法、系统及接入点

Also Published As

Publication number Publication date
CN110768769B (zh) 2022-03-29
CN110768769A (zh) 2020-02-07

Similar Documents

Publication Publication Date Title
CN110808820B (zh) 一种定位参考信号传输方法及装置
US11140707B2 (en) Time resource assignment signaling mechanism for MSG3 transmission
RU2754866C1 (ru) Способы указания выделения ресурсов временной области для физического совместно используемого канала нисходящей линии связи до rrc-соединения
US11510249B2 (en) Flexible demodulation reference signal configuration for MSG3
EP3753356B1 (en) Time resource assignment signaling mechanism for msg3 transmission
CN109391452B (zh) 分配、获取空闲态coreset的方法、基站、用户设备及可读介质
EP3689055A2 (en) Configuration of paging transmissions for wideband and narrowband ues in nr
WO2020020322A1 (zh) 通信方法和装置
CN111918304B (zh) 一种通信方法及装置
US20200100275A1 (en) Data transmission method and apparatus
KR20150095907A (ko) 디바이스­투­디바이스 통신 방법, 장치 및 시스템
WO2017075922A1 (zh) 一种非授权频谱的drs配置方法、测量方法和相关设备
US11910364B2 (en) Resource determining method, related device, and system
JP7045449B2 (ja) 5gのための効率的plmn符号化
CN114830737A (zh) 用于使减少带宽的无线设备能够接入小区的方法
CN112514440B (zh) 参考信号强度指示的测量方法和装置
BR112021016080A2 (pt) Método e aparelho de configuração de informações
JP2023081964A (ja) 方法、送信デバイス、及び受信デバイス
KR102605412B1 (ko) 어그리게이션 팩터를 갖는 무선 송신
WO2017152810A1 (zh) 信道探测信号srs的发送方法及装置
KR102707952B1 (ko) Nr 시스템에서 위치 측정을 수행하는 방법 및 장치
WO2019205925A1 (zh) 通信方法及通信装置
US10182411B2 (en) Method and access point for implementing timing synchronization in a radio communication network
CN105519026B (zh) 小区间同步的交互方法、装置以及通信系统
CN112996017A (zh) 资源分配方法、装置及设备

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: 19841287

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19841287

Country of ref document: EP

Kind code of ref document: A1