[go: up one dir, main page]

WO2020001585A1 - Procédé et appareil de synchronisation d'horloge - Google Patents

Procédé et appareil de synchronisation d'horloge Download PDF

Info

Publication number
WO2020001585A1
WO2020001585A1 PCT/CN2019/093542 CN2019093542W WO2020001585A1 WO 2020001585 A1 WO2020001585 A1 WO 2020001585A1 CN 2019093542 W CN2019093542 W CN 2019093542W WO 2020001585 A1 WO2020001585 A1 WO 2020001585A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
terminal
network device
uplink signal
information
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/093542
Other languages
English (en)
Chinese (zh)
Inventor
杨坤
汲桐
王静
高峰
于光炜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2020001585A1 publication Critical patent/WO2020001585A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
    • H04W56/007—Open loop measurement
    • H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time

Definitions

  • the present application relates to the field of communications, and more particularly, to a method and apparatus for clock synchronization.
  • LTE Long Term Evolution
  • TA uplink timing advance
  • the timing advance TA is essentially a time offset between the start time at which the terminal receives the downlink subframe and the start time at which the uplink subframe is transmitted.
  • the network device can control the time when uplink signals from different terminals reach the network device. For terminals that are far away from the network equipment, because there is a large transmission delay, it is necessary to send uplink data in advance than terminals that are closer to the network equipment.
  • the network device indicates the initial TA to the terminal when the terminal performs random access, and subsequently sends TA adjustments to the terminal from time to time through the TA command. Since the transmission of the TA adjustment depends on the implementation of the network device (can be sent or not) ), And the TA adjustment amount is to ensure the normal communication of the uplink data channel. If the terminal uses the TA adjustment amount to perform clock synchronization, it cannot meet the high-precision time synchronization requirements between the network device and the terminal.
  • the present application provides a method and apparatus for clock synchronization to meet the high-precision clock synchronization requirements between network equipment and terminals.
  • a clock synchronization method includes: a terminal sending a first uplink signal to a network device; the terminal receiving first instruction information from the network device, the first instruction information used to indicate the The time difference between the time when the first uplink signal actually arrives at the network device and the time when the first uplink signal is expected to arrive at the network device; the terminal performs clock synchronization according to the time deviation.
  • the time when the first uplink signal is expected to reach the network device may also be understood as the target arrival time of the first uplink signal, or the time when the first uplink signal is expected to reach the network device may also be understood as the network device Or the time when the boundary of the first time unit calculated by the terminal is expected to reach the network device, the first time unit is a time unit that actually transmits the first uplink signal.
  • the time offset is a deviation between a sampling point at a time when the first uplink signal actually reaches the network device and a sampling point at a time when the first uplink signal is expected to reach the network device.
  • the time unit may be a radio frame, a subframe, a time slot, a mini time slot (mini slot), an orthogonal frequency division division multiplexing (OFDM) defined in an LTE or 5G NR system.
  • the symbol may also be a time window composed of multiple frames or subframes, such as a system information (SI) window.
  • SI system information
  • the clock synchronization method in the embodiment of the present application sends a time offset to the terminal through the network device, which helps meet the high-precision clock synchronization requirement between the network device and the terminal.
  • the terminal receiving the first instruction information from the network device includes: at a second time unit, the terminal receiving the network device from the network device.
  • First indication information wherein the second time unit is the Nth time unit after the first time unit, or the second time unit is the Nth available time unit after the first time unit, or,
  • the second time unit is a first available time unit after the Nth time unit, the first time unit is a time unit that actually transmits the first uplink signal, and N is a positive integer greater than or equal to 1.
  • N is configured by the network device, or N is predefined by the protocol.
  • the terminal receives the first indication information in a first time window after sending the first uplink signal.
  • a time length, an appearance period, and a time offset with respect to the first uplink signal of the first time window are configured by the network device or predefined by a protocol.
  • the terminal receives the network device and sends the first instruction information in a first period.
  • the network device receives the first uplink signal sent by the terminal in the first period.
  • the method further includes: adjusting, by the terminal, a sending advance of the second uplink signal according to the time offset.
  • the first indication information further includes information used to indicate time-frequency resources of the first uplink signal; or the first indication information further includes Information indicating frequency domain resources of the first uplink signal; or, the first indication information further includes information used to indicate time domain resources of the first uplink signal.
  • the method for clock synchronization in the embodiment of the present application helps the terminal to determine the time in the first indication information by carrying information about time domain resources and / or frequency domain resources of the first uplink signal in the first indication information.
  • the deviation is obtained by the terminal sending a first uplink signal.
  • the method further includes that the terminal receives second instruction information from the network device, where the second instruction information includes a time indication for indicating the time deviation. Granular information.
  • the first indication information and the second indication information are carried in the same signaling.
  • the granularity of the time deviation is a positive integer number of nanoseconds (ns) or 2 ⁇ T C or T S.
  • the granularity of the time deviation is 100 ns, 50 ns, 10 ns, or 2 ⁇ T C or T S.
  • the first indication information is carried in downlink control information DCI, media access control layer control element MAC CE, or radio resource control RRC signaling.
  • a clock synchronization method includes: a network device receives a first uplink signal from a terminal; the network device sends first instruction information to the terminal, where the first instruction information is used to indicate the first A time offset between the time when an uplink signal actually arrives at the network device and the time when the first uplink signal is expected to arrive at the network device, and the time offset is used by the terminal for clock synchronization.
  • the time when the first uplink signal is expected to reach the network device may also be understood as the target arrival time of the first uplink signal, or the time when the first uplink signal is expected to reach the network device may also be understood as the network device Or the time when the first time unit estimated by the terminal is expected to arrive at the network device, the first time unit is a time unit that actually transmits the first uplink signal.
  • the time offset is a deviation between a sampling point at a time when the first uplink signal actually reaches the network device and a sampling point at a time when the first uplink signal is expected to reach the network device.
  • the time unit may be a radio frame, a sub-frame, a time slot, a mini-slot, an OFDM symbol defined in an LTE or 5G NR system, or may be composed of multiple radio frames or sub-frames Time window, such as the SI window.
  • the clock synchronization method in the embodiment of the present application sends a time offset to the terminal through the network device, which helps meet the high-precision clock synchronization requirement between the network device and the terminal.
  • the network device sending the first indication information to the terminal includes: at a second time unit, the network device sends the first indication information to the terminal
  • the second time unit is the Nth time unit after the first time unit; or the second time unit is the Nth available time unit after the first time unit; or the second time
  • the unit is the first available time unit after the Nth time unit, the first time unit is a time unit that actually transmits the first uplink signal, and N is a positive integer greater than or equal to 1.
  • the network device sends the first indication information in a first time window after receiving the first uplink signal.
  • a time length, an appearance period, and a time offset with respect to the first uplink signal of the first time window are configured by the network device or predefined by a protocol.
  • the network device sends the first indication information to the terminal, including: when the time deviation is greater than or equal to a first time threshold, the network device sends the first indication information to the terminal.
  • the terminal sends the first indication information.
  • the first indication information further includes information used to indicate time-frequency resources of the first uplink signal; or, the first indication information further includes information for Information indicating frequency domain resources of the first uplink signal; or, the first instruction information further includes information used to indicate time domain resources of the first uplink signal.
  • the method for clock synchronization in the embodiment of the present application helps the terminal to determine the time in the first indication information by carrying information about time domain resources and / or frequency domain resources of the first uplink signal in the first indication information.
  • the deviation is obtained by the terminal sending a first uplink signal.
  • the method further includes: the network device sends second instruction information to the terminal, where the second instruction information includes a granularity used to indicate a granularity of the time deviation. information.
  • the first indication information and the second indication information are carried in the same signaling.
  • the granularity of the time deviation is a positive integer number of nanoseconds (ns) or 2 ⁇ T C or T S.
  • the granularity of the time deviation is 100 ns, 50 ns, 10 ns, or 2 ⁇ T C or T S.
  • the first indication information is carried in downlink control information DCI, media access control layer control element MAC CE, or radio resource control RRC signaling.
  • a clock synchronization apparatus includes a unit for performing the foregoing steps in the first aspect or any possible implementation manner of the first aspect.
  • a clock synchronization apparatus includes a unit for performing each step in the second aspect or any possible implementation manner of the second aspect.
  • a clock synchronization apparatus includes at least one processor and a memory, where the at least one processor is configured to execute the foregoing first aspect or a method in any possible implementation manner of the first aspect.
  • an apparatus for clock synchronization includes at least one processor and a memory, and the at least one processor is configured to execute the second aspect or the method in any possible implementation manner of the second aspect.
  • a clock synchronization device includes at least one processor and an interface circuit, and the at least one processor is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect.
  • an apparatus for clock synchronization includes at least one processor and an interface circuit, and the at least one processor is configured to execute the method in the second aspect or any possible implementation manner of the second aspect.
  • a terminal in a ninth aspect, includes the device provided in the third aspect, or the terminal includes the device provided in the fifth aspect, or the terminal includes the device provided in the seventh aspect.
  • a network device includes the device provided in the fourth aspect, or the network device includes the device provided in the sixth aspect, or the network device includes the device provided in the eighth aspect. .
  • a computer program product includes a computer program that, when executed by a processor, is used to execute the first aspect or a method in any possible implementation manner of the first aspect. , Or the method in the second aspect or any possible implementation of the second aspect.
  • a computer-readable storage medium stores a computer program, and when the computer program is executed, it is used to execute the first aspect or any possible implementation manner of the first aspect. Method, or the method in the second aspect or any possible implementation of the second aspect.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 3 is another schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of high-precision clock synchronization provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a clock synchronization method according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a clock synchronization apparatus according to an embodiment of the present application.
  • FIG. 7 is another schematic block diagram of a clock synchronization apparatus according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • Terminal also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • UE user equipment
  • UE mobile station
  • MT mobile terminal
  • some examples of terminals are: mobile phones, tablet computers, laptops, handheld computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, and augmented reality (augmented reality) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and the like.
  • MID mobile internet devices
  • VR virtual reality
  • augmented reality augmented reality
  • the network device is a device in a wireless network, for example, a radio access network (RAN) node that connects a terminal to the wireless network.
  • RAN nodes are: base station, next-generation base station gNB, transmission and reception point (TRP), evolved Node B (eNB), home base station, and baseband unit (BBU).
  • TRP transmission and reception point
  • eNB evolved Node B
  • BBU baseband unit
  • AP access point
  • the network device may be a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node.
  • LTE long term evolution
  • FDD frequency division duplex
  • LTE time division duplex LTE time division duplex
  • WiMAX global interconnected microwave access
  • 5G 5th generation
  • NR new wireless
  • FIG. 1 is a schematic diagram of a communication system 100 according to an embodiment of the present application.
  • a terminal 110 and a terminal 120 access a wireless network to obtain services of an external network (such as the Internet) through the wireless network, or
  • the wireless network communicates with other terminals.
  • the wireless network includes a RAN 130, where the RAN 130 is used to access the terminal 110 and the terminal 120 to a wireless network.
  • the data transmission method provided in this application may be applicable to a wireless communication system, for example, the wireless communication system 100 shown in FIG. 1.
  • a wireless communication connection between two communication devices in a wireless communication system.
  • One of the two communication devices may correspond to the terminal 110 shown in FIG. 1.
  • the communication device may be the terminal 110 shown in FIG. 1. It may be a chip configured in the terminal 110; the other communication device of the two communication devices may correspond to the RAN 130 shown in FIG. 1, for example, it may be the RAN 130 in FIG. 1, or it may be the RAN 130 configured in the RAN 130 chip.
  • the communication system 100 shown in FIG. 1 may further include a core network (CN), and the CN may be used to manage a terminal and provide a gateway for communication with an external network.
  • CN core network
  • high-precision clock synchronization is a process in which a terminal corrects a current clock deviation according to signal transmission time information between the RAN 130 and the terminal.
  • the basic principle is to assume the reciprocity of the uplink and downlink propagation delays, and use the time information of the signal transmission to solve the clock deviation, and finally achieve the purpose of high-precision clock synchronization.
  • the network architecture described in the embodiments of the present application is to facilitate the reader to clearly understand the technical solutions in the embodiments of the present application, and does not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those of ordinary skill in the art may know that as the network architecture evolves With the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • FIG. 2 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture includes a CN device and a RAN device.
  • the RAN device includes a baseband device and a radio frequency device.
  • the baseband device can be implemented by one node or multiple nodes.
  • the radio frequency device can be implemented independently from the baseband device, or it can be integrated with the baseband device in the same physical device. , Or part of the remote part is integrated with the baseband device.
  • an eNB as a RAN device includes a baseband device and a radio frequency device.
  • the radio frequency device can be remotely arranged relative to the baseband device, such as a remote radio unit (RRU) remotely arranged relative to the BBU. .
  • RRU remote radio unit
  • the control plane protocol layer structure may include a radio resource control (RRC) layer, a packet data convergence layer protocol (PDCP) layer, a radio link control (RLC) layer, and a media interface. Functions of the protocol layer such as the access control (MAC) layer and the physical layer.
  • RRC radio resource control
  • PDCP packet data convergence layer protocol
  • RLC radio link control
  • Functions of the protocol layer such as the access control (MAC) layer and the physical layer.
  • the user plane protocol layer structure may include the functions of the protocol layers such as the PDCP layer, the RLC layer, the MAC layer, and the physical layer; in one implementation, the PDCP layer may also include a service data adaptation (SDAP) layer .
  • SDAP service data adaptation
  • a RAN device can implement the functions of the protocol layers such as radio resource control, packet data convergence layer protocol, radio link control, and media access control by one node; or the functions of these protocol layers can be implemented by multiple nodes; for example, in a In this evolved structure, a RAN device may include a CU and a DU, and multiple DUs may be centrally controlled by a CU. As shown in Figure 2, CU and DU can be divided according to the protocol layer of the wireless network. For example, the functions of the PDCP layer and above are set in the CU, and the functions of the protocol layers below PDCP, such as the RLC layer and the MAC layer are set in the DU.
  • This division of the protocol layer is only an example. It can also be divided at other protocol layers, for example, at the RLC layer.
  • the functions of the RLC layer and above are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU.
  • it is divided in a certain protocol layer, for example, setting some functions of the RLC layer and functions of the protocol layer above the RLC layer in the CU, and setting the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer in the DU.
  • it can also be divided in other ways, such as by delay, and the functions that need to meet the delay requirements in processing time are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU.
  • the radio frequency device can be remote, not placed in the DU, or integrated in the DU, or part of the remote can be integrated in the DU, without any restrictions here.
  • FIG. 3 shows a schematic diagram of another network architecture provided by an embodiment of the present application.
  • the control plane (CP) and user plane (UP) of the CU can also be changed. It is separated and implemented by different entities, which are a control plane CU entity (CU-CP entity) and a user plane CU entity (CU-UP entity).
  • CU-CP entity control plane CU entity
  • CU-UP entity user plane CU entity
  • the signaling generated by the CU can be sent to the terminal through the DU, or the signaling generated by the terminal can be sent to the CU after being received through the DU.
  • the DU can directly transmit to the terminal or the CU through protocol layer encapsulation without parsing the signaling.
  • the CU is divided into network equipment on the RAN side.
  • the CU may also be divided into network equipment on the CN side, which is not limited herein.
  • the devices in the following embodiments of the present application may be located in a terminal or a network device according to the functions they implement.
  • the network device may be a CU node, or a DU node, or a network device including a CU node and a DU node.
  • the architecture of the CU and DU is not limited to 5G, NR, and gNB, and can also be applied to a scenario where an LTE base station is divided into CU and DU.
  • the protocol layer does not include an SDAP layer.
  • network equipment and terminals have their own clock systems.
  • the clock system performs timing according to a predefined rule; the time rule can be a time system defined by an international standard, or a time standard defined by a local area network.
  • the network device can calibrate its own clock system through a wired network or a global positioning system (GPS); the terminal can calibrate the terminal's clock system through the time synchronization process using the network device's clock system as a reference.
  • GPS global positioning system
  • time information of the network equipment is represented by t BS
  • time information of the terminal is represented by t UE
  • the purpose of high-precision clock synchronization is to estimate and eliminate the time offset T offset between the network device and the clock system of the terminal.
  • the high-precision clock synchronization process requires that the network device and the terminal each send a signal to each other. For the timing signal, the network device sends a downlink timing signal to the terminal, and the terminal sends the network device an uplink timing signal.
  • Figure 4 shows a schematic diagram of high-precision clock synchronization. As shown in Figure 4, it is assumed that the network device Send a downlink timing signal to the terminal. Received the downlink timing signal, and the terminal is at Send an uplink timing signal to the network device. The network device is in Receive the uplink timing signal. Assume that the propagation delays of the uplink and downlink timing signals are P UL and P DL, respectively .
  • the network device and the terminal interact with the timing signal to determine the time information corresponding to the sending and receiving of the uplink and downlink timing signals on the network device or the terminal's clock system (for example, in Figure 4). with ), The time offset T offset between the network device and the clock system of the terminal can be obtained.
  • the time information on the terminal's clock system at the time corresponding to the received and transmitted signals on the terminal side can be obtained by the terminal's clock system, and its accuracy depends on the terminal implementation.
  • Time information on the clock system of the network device for the time corresponding to the boundary of the wireless frame that sends the downlink timing signal for the network device can obtain the time information through the resource scheduling information sent by the network device and the high-precision timing information obtained before. Therefore, It is also known to the terminal. Since the downlink signal is to be transmitted according to the frame structure of the 3rd generation partnership project (3GPP) air interface, ideally, each frame boundary interval is 10 milliseconds (ms). The terminal can calculate the time information on the clock system of the network device at the time corresponding to the frame boundary of the downlink timing signal according to the system information in the NR or LTE system (such as SIB16) or a dedicated new design high-precision time notification message That is, as shown in formula (5):
  • 3GPP 3rd generation partnership project
  • T frame represents the length of the wireless frame, for example, T frame It is equal to 10ms, m represents the frame offset of the frame boundary corresponding to the downlink timing signal from the reference frame boundary, and m is an integer greater than or equal to 0.
  • time unit boundary of the timing signal in the following line in formula (5) is taken as an example to illustrate the wireless frame boundary.
  • the time unit boundary may also be a subframe boundary, a slot boundary, a microslot boundary, or an orthogonal frequency division complex Orthogonal frequency division multiplexing (OFDM) symbol boundaries.
  • T frame can be replaced with a sub-frame length, a slot length, a mini-slot length, or an OFDM symbol length.
  • the time unit boundary of the downlink timing signal may be a time slot boundary, as shown in formula (6):
  • T slot is the slot length
  • the offset of the time slot boundary corresponding to the downlink timing signal from the time corresponding to the reference point is m radio frames and k time slots, and k is an integer greater than or equal to zero.
  • the time unit boundary of the downlink timing signal may be a symbol boundary, as shown in formula (7):
  • T symbol is the symbol length
  • the offset of the symbol boundary corresponding to the downlink timing signal from the time corresponding to the reference point is m radio frames, k slots, and l symbols, where l is an integer greater than or equal to 0 .
  • the terminal does not know the time information, so the network device needs to indicate the time information to the terminal.
  • the terminal needs to obtain Time information, other time information is known to the terminal.
  • the terminal can be obtained through the resource scheduling information sent by the network device and the high-precision time notification message obtained previously, so Also known to the terminal, the scheduling information of the network device indicates versus Frame / slot offset, as shown in formula (8):
  • n represents the frame offset of the frame boundary corresponding to the uplink timing signal received by the network device relative to the reference frame boundary.
  • the terminal can also get or Come indirectly
  • the terminal In order to maintain high-precision time synchronization with network equipment, for example, the synchronization error needs to be within ⁇ 500 nanoseconds (nanosecond, ns), the terminal needs to periodically adjust the clock to overcome the crystal oscillator drift. In other words, it is necessary to periodically send the uplink and downlink timing signals and obtain the clock offset T offset .
  • the network device can send the timing signals to the terminal in time after receiving the timing signals.
  • the first instruction information is a time deviation between the actual time and the ideal time when the network device detects the uplink timing signal.
  • the clock system of the network device may work in accordance with a coordinated universal time (UTC) clock or a global navigation satellite system (GNSS) clock; the UTC clock uses The UTC time system identifies time (or records time information).
  • the GNSS clock uses the GNSS time system to identify time.
  • the 3GPP clock is a time representation method defined by the wireless communication system based on the LTE / 5GNR frame structure.
  • FIG. 5 shows a schematic flowchart of a clock synchronization method 200 according to an embodiment of the present application.
  • the execution body of the method 200 may be a clock synchronization device (for example, a terminal or a chip for a terminal or Device, network device or chip or device for network device), the following description is made with the execution subject as the terminal and the network device.
  • the method 200 includes:
  • the terminal sends a first uplink signal to a network device, and the network device receives the first uplink signal sent by the terminal.
  • the first uplink signal includes, but is not limited to, a sounding reference signal (SRS), a modulation reference signal (DMRS), a phase tracking reference signal (PTRS), a physical Random access channel (physical random access channel, PRACH) or a newly designed dedicated reference signal.
  • SRS sounding reference signal
  • DMRS modulation reference signal
  • PTRS phase tracking reference signal
  • PRACH Physical Random access channel
  • the first uplink signal may correspond to the uplink timing signal in FIG. 4.
  • the method further includes:
  • the network device sends a downlink signal to the terminal, and the terminal receives the downlink signal sent by the network device.
  • the downlink signal includes, but is not limited to, a physical downlink control channel (PDCCH), a DMRS on a physical downlink shared channel (PDSCH), and a channel state information reference signal (channel state information) -reference signal (CSI-RS), tracking reference signal (CSI-RS for tracking / TRS), synchronization signal block (SSB), primary synchronization signal (PSS), secondary synchronization signal (secondary) synchronization (SSS), DMRS or PTRS.
  • a physical downlink control channel PDCCH
  • CSI-RS channel state information reference signal
  • CSI-RS channel state information reference signal
  • CSI-RS tracking reference signal
  • SSB synchronization signal block
  • PSS primary synchronization signal
  • secondary synchronization signal secondary synchronization signal
  • DMRS or PTRS.
  • the downlink signal may correspond to the downlink timing signal in FIG. 4.
  • the terminal receives the downlink signal sent by the network device in the downlink time unit.
  • the network device sends the first instruction information to the terminal.
  • the terminal receives the first instruction information sent by the network device.
  • the first instruction information is used to indicate that the time when the first uplink signal actually reaches the network device and the first The time deviation of the time when an upstream signal is expected to reach the network device.
  • the time when the first uplink signal is expected to reach the network device may also be understood as the target arrival time of the first uplink signal, or the time when the first uplink signal is expected to reach the network device may also be understood as the network device Or the time when the boundary of the first time unit calculated by the terminal is expected to reach the network device.
  • boundary of the first time unit may be a start boundary or an end boundary of the first time unit.
  • the time unit may be a radio frame, a sub-frame, a time slot, a mini-slot, an OFDM symbol, or multiple frames or sub-frames defined in an LTE or 5G NR system.
  • Time window such as the system information (SI) window.
  • the network device receives the first uplink signal sent by the terminal, according to the actual receiving time of the first uplink signal (for example, FIG. 4 ) To determine first indication information, where the first indication information is used to indicate a time difference between the time when the first uplink signal actually arrives at the network device and the time when the first uplink signal is expected to arrive at the network device.
  • the first indication information is used to indicate a time difference between the time when the first uplink signal actually arrives at the network device and the time when the first uplink signal is expected to arrive at the network device.
  • the first indication information may indicate a time when the first uplink signal actually arrives at the network device and a time when the first time unit estimated by the network device or terminal arrives at the network device (for example, in FIG. 4 ) (For example, ).
  • ⁇ t is a time deviation under a clock system of a network device, for example, it may be a time deviation under a UTC or GNSS clock system.
  • the time deviation is a deviation between a sampling point at which the first uplink signal actually reaches the network device and a sampling point at which the first uplink signal is expected to reach the network device (for example, the time deviation may be expressed as N diff ).
  • N diff is the time deviation under the 3GPP air interface frame timing time system.
  • the reason for N diff is the change in signal transmission time P UL and P DL , or N diff represents the error of the adjustment amount of TA, which can be understood as The correction of the TA adjustment amount makes the TA notification accuracy higher.
  • ⁇ t includes N diff and also includes the time deviation that occurs during the interval between the downlink signal reception and the first uplink signal transmission. The time deviation is determined by the clock system of the network equipment and the 3GPP air interface frame timing time system. The difference between the timing frequency is generated. If the hardware of the network equipment is ideal enough, this deviation is on the order of ns, so ⁇ t and N diff can be considered approximately the same.
  • the sending, by the network device, the first indication information to the terminal includes:
  • the network device uses the first cycle to send the first instruction information to the terminal.
  • the first period is a period in which the terminal sends an uplink signal.
  • the first uplink signal sent by the terminal in S210 may correspond to the first indication information determined by the network device in S220, so the sending mechanism of the first indication information may be a mechanism that follows the clock synchronization process. It is determined that the first indication information may be sent periodically or aperiodically.
  • the clock synchronization process is aperiodic and temporarily configured (for example, when the terminal starts time synchronization, it can initiate an aperiodic clock synchronization process and then transition to periodic synchronization), then the first indication information is sent It can also be aperiodic.
  • the sending of the first indication information is also cyclic, and the periods of the two may be the same.
  • a network device periodically sends a time offset to a terminal, and the terminal can obtain the time offset periodically, thereby performing clock synchronization, which helps to meet the high-precision Clock synchronization requirements.
  • the network device sending the first instruction information to the terminal includes: at a second time unit, the network device sends the first instruction information to the terminal, and the terminal receives the first instruction information sent by the network device
  • the second time unit is the Nth time unit after the first time unit; or the second time unit is the Nth available time unit after the first time unit; or the second time The unit is the first available time unit after the Nth time unit, and N is a positive integer greater than or equal to 1.
  • the network device receives the first uplink signal in the first time slot Then, the first indication information may be sent to the terminal in a third time slot.
  • the network device sends the first indication information to the terminal.
  • the first time resource location may be some symbols in the third time slot.
  • N is configured by a network device, or N is predefined by a protocol.
  • the network device sends the first indication information in a first time window after receiving the first uplink signal.
  • a time length, an appearance period, and a time offset with respect to the first uplink signal of the first time window are configured by the network device or predefined by a protocol.
  • the first indication information may be carried in downlink control information (DCI), medium access control element (MAC CE), or radio resource control (RRC). Signaling.
  • DCI downlink control information
  • MAC CE medium access control element
  • RRC radio resource control
  • the first indication information is carried in the MAC CE.
  • the method further includes: the network device sends second instruction information to the terminal, the terminal receives the second instruction information sent by the network device, and the second instruction information includes a granularity for indicating a granularity of the time deviation. information.
  • the second indication information includes information used to indicate the granularity of the time deviation, and it can also be understood that the second indication information includes a field, which is used to indicate the granularity of the time deviation.
  • the granularity of the time deviation is a positive integer ns or 2 ⁇ T C or T s , where 2 ⁇ is a magnification of the system sampling period, T C is the minimum sampling time period defined in NR, and ⁇ is positive
  • the integer and the size of ⁇ can be determined by the subcarrier interval and the communication system bandwidth.
  • T s is a basic time unit defined by LTE, and T s is equal to 1 / (15000 ⁇ 2048) seconds.
  • the granularity of the time deviation is 100 ns, 50 ns, 10 ns, and 2 ⁇ T C or T s .
  • the time deviation ( ⁇ t or N diff ) and the granularity of the time deviation may be carried in the same signaling.
  • both the time deviation and the time deviation are carried in the MAC CE; the time deviation and the time deviation also have the same granularity. It can be carried in different signaling, for example, the time deviation is indicated in the MAC CE, and the granularity of the time deviation is carried in the RRC signaling.
  • the network device in the initial stage of high-precision time synchronization, indicates the granularity of time deviation through RRC signaling, and after the network device receives the uplink signal, it sends the first indication information using MAC CE. .
  • the granularity of the time deviation is implicitly determined by the terminal and the network device through known parameters.
  • the terminal and the network device determine the granularity of the corresponding time deviation through the accuracy requirements of time synchronization or parameters such as the uplink signal bandwidth.
  • the terminal can obtain a fine-grained time offset, which is helpful to meet the accuracy of clock synchronization.
  • the first indication information further includes information of a type of the time offset.
  • the network device may add an identifier to the first indication information, and the identifier is used to distinguish ⁇ t and N diff .
  • the first indication information further includes information used to indicate time-frequency resources of the first uplink signal; or, the first indication information further includes information used to indicate frequency domain resources of the first uplink signal; or The first indication information further includes information used to indicate time domain resources of the first uplink signal.
  • the information of the time domain resource may be an identifier of the time domain resource
  • the information of the frequency domain resource may be an identifier of the frequency domain resource
  • the information of the time frequency resource may be an identifier of the time frequency resource.
  • the network device may add time domain resources and / or frequency domains of the first uplink signal to the first indication information. Resource information, so that the terminal determines that the time deviation in the first indication information is obtained by sending the first uplink signal from the terminal.
  • the triggering manner of the first indication information may be an uplink signal trigger or a condition trigger.
  • the network device sends the first indication information to the terminal within a certain period of time after receiving the first uplink signal.
  • the network device determines whether the time deviation is greater than or equal to the first time threshold. If the time deviation is greater than or equal to the first time threshold, the The network device sends the first indication information to the terminal; if the time deviation is less than the first time threshold, the network device does not send the first indication information.
  • the network device does not send the first instruction information to the terminal.
  • the network device may also determine whether the time deviation is greater than a first time threshold after determining the time deviation, and if the time deviation is greater than the first time threshold, the network device sends the first instruction information to the terminal; If the time deviation is less than or equal to the first time threshold, the network device does not send the first indication information.
  • the first time threshold is determined by factors such as accuracy of time synchronization or hardware implementation of the network device, and may be determined by the network device, or implicitly determined by the terminal and the network device through known parameters.
  • the terminal and the network device may determine the first time threshold according to the bandwidth of the uplink signal; since the larger the uplink channel bandwidth, the more accurate the detection result of the system, the first time threshold may also be reduced accordingly.
  • the terminal and the network device may also determine the first time threshold according to different synchronization accuracy requirements.
  • the terminal performs clock synchronization according to the time deviation.
  • the terminal corrects the local clock after receiving the first instruction information.
  • the time correction method is as shown in formula (9), and the time deviation between the clock of the network device and the terminal is calculated:
  • the time correction method is as shown in formula (10):
  • N TA is the amount of advance for the network device to notify the terminal to send the first uplink signal and is used to compensate Sum of propagation delays.
  • the terminal is based on And the time displayed by the terminal's local clock Complete the time synchronization by passing T offset is determined, after determining that the terminal T offset, corrected by the terminal T offset time clock display Or, the terminal is getting Directly Write the clock to this terminal.
  • time deviation ⁇ t under the clock system of the network device and the time deviation N diff under the 3GPP air interface frame timing time system can be converted to each other.
  • the same dimension should be used when calculating the time deviation. If the first instruction information indicates that the granularity of the time deviation is 2 ⁇ T C , then the terminal should convert N diff to Granularity in seconds.
  • the terminal monitors the first indication information for a period of time after the first uplink signal is sent. If the first indication information is received, then according to ⁇ t or N diff and the time synchronization formula (9) or (10) ) Perform clock correction; if no corresponding information is received, it is considered that ⁇ t or N diff is 0 and no correction is performed.
  • the method further includes: adjusting, by the terminal, a sending advance of the second uplink signal according to the time offset.
  • the second uplink signal may be a next uplink signal to be sent after the terminal sends the first uplink signal.
  • the time offset may be used to adjust the sending advance of the second uplink signal.
  • the terminal may further adjust the transmission advance of the second uplink signal according to the time offset, and the terminal may adjust the transmission advance of the second uplink signal. It is (N TA + N diff ) ⁇ T S.
  • An embodiment of the present application further provides an apparatus for implementing any one of the foregoing methods.
  • an apparatus is provided, which includes a unit (or means) for implementing each step performed by a terminal in any one of the above methods.
  • another apparatus is provided, which includes a unit (or means) for implementing each step performed by a network device in any one of the methods.
  • FIG. 6 shows a schematic block diagram of a clock synchronization apparatus 300 according to an embodiment of the present application.
  • the apparatus 300 may correspond to the terminal described in the foregoing method 200, and may also correspond to a chip or component of the terminal.
  • the modules or units may be respectively used to perform various actions or processing processes performed by the terminal in the foregoing method 200.
  • the clock synchronization apparatus 300 may include a processing unit 310, a sending unit 320, and a receiving unit 330.
  • the processing unit 310 is configured to generate a first uplink signal
  • the sending unit 320 is configured to send a first uplink signal to a network device.
  • the receiving unit 330 is configured to receive first instruction information from the network device, where the first instruction information is used to indicate a time when the first uplink signal actually arrives at the network device and a time when the first uplink signal is expected to arrive at the network device. Time deviation
  • the processing unit 310 is further configured to perform clock synchronization according to the time deviation.
  • a processing unit in the chip may generate a clock synchronization instruction according to the first instruction information, and send the clock synchronization instruction to the clock synchronization unit of the terminal for clock synchronization.
  • FIG. 7 shows a schematic block diagram of a clock synchronization apparatus 400 according to an embodiment of the present application.
  • the apparatus 400 may correspond to the network device described in the foregoing method 200, and may also correspond to a chip or component of the network device. Furthermore, the apparatus 400 Each module or unit in the method may be used to perform each action or processing performed by the network device in the foregoing method 200.
  • the clock synchronization apparatus 400 may include a receiving unit 410, a processing unit 420, and a sending unit 430. .
  • the receiving unit 410 is configured to receive a first uplink signal from a terminal
  • the processing unit 420 is configured to control the sending unit 430 to send the first instruction information to the terminal, where the first instruction information is used to indicate a time when the first uplink signal actually reaches the network device and a time when the first uplink signal is expected to reach the network device Time deviation of time, this time deviation is used by the terminal for clock synchronization.
  • each unit in the above device is only a division of logical functions. In actual implementation, it may be fully or partially integrated into a physical entity, or it may be physically separated. And all units in the device can be implemented by software through the processing element call; all units can also be implemented by hardware; some units can also be implemented by software via the processing element call, and some units can be implemented by hardware.
  • each unit can be a separately established processing element, or it can be integrated into a chip of the device to achieve it.
  • it can also be stored in the form of a program in the memory and called and executed by a certain processing element of the device.
  • the processing element described here can also be called a processor, which can be an integrated circuit with signal processing capabilities.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or in a form called by software through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more application specific integrated circuits (ASICs), or, one or Multiple digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.
  • ASICs application specific integrated circuits
  • DSPs Multiple digital signal processors
  • FPGAs field programmable gate arrays
  • the processing element may be a general-purpose processor, such as a central processing unit (CPU) or another processor that can call a program.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application. It may be the terminal in the above embodiments, and is used to implement the operation of the terminal in the above embodiments.
  • the terminal includes: an antenna 510, a radio frequency device 520, and a signal processing section 530.
  • the antenna 510 is connected to the radio frequency device 520.
  • the radio frequency device 520 receives the information sent by the network device through the antenna 510, and sends the information sent by the network device to the signal processing section 530 for processing.
  • the signal processing section 530 processes the information of the terminal and sends it to the radio frequency device 520.
  • the radio frequency device 520 processes the information of the terminal and sends it to the network device via the antenna 510.
  • the signal processing section 530 may include a modulation and demodulation subsystem to implement processing of each communication protocol layer of the data; it may also include a central processing subsystem to implement processing of the terminal operating system and the application layer; in addition, it may also include Other subsystems, such as multimedia subsystems and peripheral subsystems. Among them, the multimedia subsystem is used to control the terminal camera and screen display, and the peripheral subsystem is used to achieve connection with other devices.
  • the modem subsystem can be an independent chip.
  • the above device for a terminal may be located in the modulation and demodulation subsystem.
  • the modem subsystem may include one or more processing elements 531, for example, including a main control CPU and other integrated circuits.
  • the modem subsystem may further include a storage element 532 and an interface circuit 533.
  • the storage element 532 is used to store data and programs, but the program used to execute the method executed by the terminal in the above method may not be stored in the storage element 532 but stored in a memory other than the modem subsystem.
  • the interface circuit 533 is used to communicate with other subsystems.
  • the above device for a terminal may be located in a modulation and demodulation subsystem, which may be implemented by a chip.
  • the chip includes at least one processing element and an interface circuit, and the processing element is configured to perform any method performed by the terminal.
  • each step of the interface circuit is used to communicate with other devices.
  • the unit that the terminal implements each step in the above method may be implemented in the form of a processing element scheduler.
  • a device for a terminal includes a processing element and a storage element, and the processing element calls a program stored by the storage element to execute the above The method executed by the terminal in the method embodiment.
  • the storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.
  • the program for executing the method executed by the terminal in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element calls or loads the program from the off-chip storage element to the on-chip storage element to call and execute the method executed by the terminal in the foregoing method embodiments.
  • the unit that implements each step in the above method of the terminal may be configured as one or more processing elements, and these processing elements are provided on the modulation and demodulation subsystem.
  • the processing elements here may be integrated circuits, such as : One or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the unit that implements each step in the above method in the terminal may be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application. It is used to implement the operation of the network device in the above embodiments.
  • the network device includes an antenna 601, a radio frequency device 602, and a baseband device 603.
  • the antenna 601 is connected to the radio frequency device 602.
  • the radio frequency device 602 receives the information sent by the terminal through the antenna 601, and sends the information sent by the terminal to the baseband device 603 for processing.
  • the baseband device 603 processes the information of the terminal and sends it to the radio frequency device 602.
  • the radio frequency device 602 processes the information of the terminal and sends it to the terminal via the antenna 601.
  • the baseband device 603 may include one or more processing elements 6031, for example, including a main control CPU and other integrated circuits.
  • the baseband device 603 may further include a storage element 6032 and an interface 6033.
  • the storage element 6032 is used to store programs and data; the interface 6033 is used to exchange information with the radio frequency device 602.
  • the interface is, for example, a common public wireless interface , CPRI).
  • the above device for a network device may be located in a baseband device 603.
  • the above device for a network device may be a chip on the baseband device 603.
  • the chip includes at least one processing element and an interface circuit, and the processing element is used to execute the above network.
  • the device executes each step of any method, and the interface circuit is used to communicate with other devices.
  • the unit that the network device implements each step in the above method may be implemented in the form of a processing element scheduler.
  • an apparatus for a network device includes a processing element and a storage element.
  • the processing element calls a program stored by the storage element, The method performed by the network device in the foregoing method embodiment is performed.
  • the storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the unit that the network device implements each step in the above method may be configured as one or more processing elements, which are disposed on the baseband device.
  • the processing element here may be an integrated circuit, for example: an Or multiple ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • a unit that implements each step in the above method by a network device may be integrated together and implemented in the form of a system on a chip.
  • the baseband device includes the SOC chip to implement the above method.
  • the terminal and the network device in each of the foregoing device embodiments may completely correspond to the terminal or the network device in the method embodiment, and corresponding modules or units execute corresponding steps.
  • the receiving The unit may be an interface circuit that the chip uses to receive signals from other chips or devices.
  • the above sending unit is an interface circuit of the device for sending signals to other devices.
  • the sending unit is the chip for sending signals to other chips or devices. Interface circuit.
  • An embodiment of the present application further provides a communication system.
  • the communication system includes the foregoing terminal and the foregoing network device.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), or Erase programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double SDRAM double SDRAM
  • DDR SDRAM double data rate Synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronously connected dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM, DR RAM
  • the size of the sequence numbers of the above processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not deal with the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • system and “network” are often used interchangeably herein.
  • the term “and / or” in this document is only a kind of association relationship describing related objects, which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and exists alone B these three cases.
  • the character "/" in this text generally indicates that the related objects are an "or" relationship.
  • uplink and downlink appearing in this application are used to describe the direction of data / information transmission in specific scenarios.
  • the direction of “uplink” generally refers to the direction or distribution of data / information from the terminal to the network side.
  • the “downlink” direction generally refers to the direction in which data / information is transmitted from the network side to the terminal, or the direction in which the centralized unit transmits to the distributed unit. It can be understood that “uplink” and “downlink” “” It is only used to describe the direction of data / information transmission, and the specific start and stop of the data / information transmission are not limited.
  • all or part of the implementation may be implemented by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product may include one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, a computer, a server, or a data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available medium integration.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic disk), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), or the like.

Landscapes

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

Abstract

La présente invention concerne un procédé et un appareil de synchronisation d'horloge. Le procédé comprend les étapes suivantes : un dispositif de réseau reçoit un signal de liaison montante d'un terminal, détermine la différence de temps entre l'instant d'arrivée réelle du signal de liaison montante au dispositif de réseau et un instant d'arrivée cible du signal de liaison montante, et indique la différence de temps au terminal au moyen d'informations d'indication ; et, au moyen de la différence de temps, le terminal corrige l'horloge du terminal afin d'assurer une synchronisation avec l'horloge du dispositif de réseau. Dans le procédé de synchronisation d'horloge décrit dans les modes de réalisation de la présente invention, un terminal implémente une synchronisation d'horloge au moyen d'une différence de temps indiquée par un dispositif de réseau, répondant ainsi aux exigences de synchronisation d'horloge de haute précision entre le dispositif de réseau et le terminal.
PCT/CN2019/093542 2018-06-28 2019-06-28 Procédé et appareil de synchronisation d'horloge Ceased WO2020001585A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810688385.3A CN110662283A (zh) 2018-06-28 2018-06-28 一种时钟同步的方法和装置
CN201810688385.3 2018-06-28

Publications (1)

Publication Number Publication Date
WO2020001585A1 true WO2020001585A1 (fr) 2020-01-02

Family

ID=68985518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/093542 Ceased WO2020001585A1 (fr) 2018-06-28 2019-06-28 Procédé et appareil de synchronisation d'horloge

Country Status (2)

Country Link
CN (1) CN110662283A (fr)
WO (1) WO2020001585A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113115427B (zh) * 2020-01-10 2022-10-04 广东电网有限责任公司电力科学研究院 电能质量监测设备及其电能质量数据传输方法和装置
EP4080950A4 (fr) * 2020-01-23 2022-12-28 Huawei Technologies Co., Ltd. Procédé de synchronisation temporelle, dispositif de réseau d'accès, appareil de communication, support de stockage informatique et système de communication
CN111294134B (zh) * 2020-02-04 2021-04-20 北京邮电大学 授时方法、装置及电子设备
CN113543299A (zh) * 2020-04-15 2021-10-22 华为技术有限公司 一种时间同步方法及装置
CN111770565B (zh) * 2020-06-23 2021-08-20 中国科学院上海微系统与信息技术研究所 一种非地面网络的定时提前调整方法
WO2022027225A1 (fr) * 2020-08-04 2022-02-10 华为技术有限公司 Procédé et appareil de synchronisation de liaison montante
CN116438861A (zh) 2020-10-21 2023-07-14 华为技术有限公司 一种通信方法及装置
CN113419598B (zh) * 2021-05-18 2022-09-20 武汉中海庭数据技术有限公司 一种多soc系统时钟同步系统及方法
CN113260041A (zh) * 2021-07-08 2021-08-13 成都爱瑞无线科技有限公司 用于无线通信的时间同步方法、无线通信设备及存储介质
US20240323885A1 (en) * 2021-07-14 2024-09-26 Beijing Xiaomi Mobile Software Co., Ltd. Method and apparatus for reporting timing error
CN116033538A (zh) * 2021-10-27 2023-04-28 上海华为技术有限公司 一种信号传输方法和相关设备
WO2023102928A1 (fr) * 2021-12-10 2023-06-15 北京小米移动软件有限公司 Procédé et appareil de synchronisation, dispositif, et support de stockage
CN114222360B (zh) * 2021-12-21 2023-09-12 南京欧珀软件科技有限公司 时间同步方法、系统及相关装置
CN116867067A (zh) * 2022-03-23 2023-10-10 华为技术有限公司 通信方法及装置
CN117202336A (zh) * 2022-05-31 2023-12-08 华为技术有限公司 一种时间同步方法、通信装置及通信系统
CN115002894B (zh) * 2022-08-03 2022-11-01 杰创智能科技股份有限公司 上行定时同步方法、装置、设备及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647784A (zh) * 2012-04-20 2012-08-22 北京创毅讯联科技股份有限公司 上行同步控制调整方法及装置
CN102948230A (zh) * 2010-05-06 2013-02-27 爱立信(中国)通信有限公司 无线通信系统中的方法和装置
WO2016071021A1 (fr) * 2014-11-07 2016-05-12 Panasonic Intellectual Property Corporation Of America Synchronisation pour un accès assisté par licence d'évolution à long terme (lte) dans des bandes non autorisées
CN106031259A (zh) * 2014-01-16 2016-10-12 三星电子株式会社 在无线通信系统中用于控制终端的定时的方法及其电子设备
CN107426810A (zh) * 2016-05-23 2017-12-01 中兴通讯股份有限公司 上行定时的获取方法及装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102196479B (zh) * 2010-03-10 2014-01-08 华为技术有限公司 定时提前值的共享检测方法、用户设备、基站及系统
CN107422300A (zh) * 2017-09-05 2017-12-01 芜湖华创光电科技有限公司 一种对非配合无线通信终端信号到达时差提取方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102948230A (zh) * 2010-05-06 2013-02-27 爱立信(中国)通信有限公司 无线通信系统中的方法和装置
CN102647784A (zh) * 2012-04-20 2012-08-22 北京创毅讯联科技股份有限公司 上行同步控制调整方法及装置
CN106031259A (zh) * 2014-01-16 2016-10-12 三星电子株式会社 在无线通信系统中用于控制终端的定时的方法及其电子设备
WO2016071021A1 (fr) * 2014-11-07 2016-05-12 Panasonic Intellectual Property Corporation Of America Synchronisation pour un accès assisté par licence d'évolution à long terme (lte) dans des bandes non autorisées
CN107426810A (zh) * 2016-05-23 2017-12-01 中兴通讯股份有限公司 上行定时的获取方法及装置

Also Published As

Publication number Publication date
CN110662283A (zh) 2020-01-07

Similar Documents

Publication Publication Date Title
WO2020001585A1 (fr) Procédé et appareil de synchronisation d'horloge
CN110324889B (zh) 时钟同步方法、通信装置及通信设备
US11432254B2 (en) UE initiated propagation delay compensation mechanism
WO2020001367A1 (fr) Procédé et dispositif de correction d'informations temporelles
WO2019024756A1 (fr) Procédé de communication, dispositif de réseau et dispositif relais
AU2017405700A1 (en) Data transmission method, terminal device and network device
US11678288B2 (en) Synchronization of time sensitive communication hold-and-forward buffers with time sensitive communication assistance information
CN112449370A (zh) 定位的方法和通信装置
WO2018202116A1 (fr) Procédé de communication, dispositif réseau et dispositif terminal
CN108882382A (zh) 传输方法、终端和网络设备
WO2020164077A1 (fr) Procédé d'attribution de ressources, dispositif terminal, et dispositif de réseau
WO2021072654A1 (fr) Procédé et dispositif de détermination d'horloge de référence, dispositif terminal et dispositif réseau
WO2017076195A1 (fr) Procédé de synchronisation d'horloges, et procédé et appareil d'émission d'informations de synchronisation
WO2022027666A1 (fr) Procédé et appareil de synchronisation temporelle
CN111447026B (zh) 处理数据的方法和处理数据的装置
US20230300766A1 (en) Method of propagation delay compensation and related devices
WO2021017523A1 (fr) Procédé d'authentification de dispositif de réseau d'accès et dispositif associé
JP7284258B2 (ja) リソース構成方法、ネットワークデバイス及び端末デバイス
US12418957B2 (en) Wireless method and apparatus for improving communication reliability of a terminal device
WO2021013017A1 (fr) Procédé et dispositif de reprise après défaillance de faisceau de scell, équipement utilisateur (ue) et dispositif de réseau
US20230180157A1 (en) Apparatus, Method and Computer Program
WO2019015546A1 (fr) Procédé et dispositif de transmission d'informations
JP2023538698A (ja) Ｃｓｉを報告する方法、ｃｓｉを受信する方法および対応する装置
WO2019051791A1 (fr) Procédé et dispositif de transmission de données
WO2021033114A1 (fr) Amélioration de l'avance temporelle

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: 19825427

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: 19825427

Country of ref document: EP

Kind code of ref document: A1