[go: up one dir, main page]

WO2015109524A1 - Procédé et dispositif d'émission de signal de synchronisation - Google Patents

Procédé et dispositif d'émission de signal de synchronisation Download PDF

Info

Publication number
WO2015109524A1
WO2015109524A1 PCT/CN2014/071363 CN2014071363W WO2015109524A1 WO 2015109524 A1 WO2015109524 A1 WO 2015109524A1 CN 2014071363 W CN2014071363 W CN 2014071363W WO 2015109524 A1 WO2015109524 A1 WO 2015109524A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal device
signal
wake
synchronization
synchronization signal
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/CN2014/071363
Other languages
English (en)
Chinese (zh)
Inventor
刘德平
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
Priority to PCT/CN2014/071363 priority Critical patent/WO2015109524A1/fr
Priority to CN201480000634.5A priority patent/CN105379375A/zh
Publication of WO2015109524A1 publication Critical patent/WO2015109524A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for transmitting a synchronization signal.
  • D2D (Device to Device) refers to direct communication between terminal devices or direct communication with the assistance of the network.
  • D2D has three working scenarios, namely network coverage, no network coverage and partial network coverage.
  • the terminal devices participating in D2D communication are within the coverage of the network; in the scenario without network coverage, participation
  • the terminal devices of the D2D communication are all in the coverage of the network; in the scenario of partial network coverage, a part of the terminal devices participating in the D2D communication are within the coverage of the network, and another part of the terminal devices are outside the coverage of the network.
  • the two communicating parties of the synchronous communication need to establish synchronization first, and adjust the frequency and timing of the two terminal devices to the same frequency and time.
  • Synchronization requires a common synchronization reference between the two terminal devices communicating, which is the device that provides the synchronization reference.
  • the prior art uses the base stations in the network as a synchronization source, and the terminal devices synchronized to the base station form a group.
  • one of the plurality of terminal devices without network coverage in the prior art is used as a synchronization source, and other terminal devices synchronized to the terminal device form a group.
  • the prior art is not able to generate a group of partial network coverage, and the partially covered group helps to reduce the interference of the network coverage boundary and enhance the synchronization precision.
  • some terminal devices are within the network coverage, and another terminal device is outside the network coverage.
  • the terminal devices outside the network coverage cannot discover the terminal devices within the network coverage and perform synchronous communication. , increasing the difficulty of connecting users inside and outside the network coverage. For example: In the event of an earthquake or snowstorm, users in the disaster area outside the network coverage cannot use the terminal equipment to communicate effectively with users in the network coverage of the outside world, which improves rescue or other work. Difficulty.
  • Embodiments of the present invention provide a method and an apparatus for transmitting a synchronization signal, which can implement synchronous communication of terminal devices inside and outside the network coverage in a working scenario of partial network coverage, and reduce users in and out of the network coverage.
  • the difficulty of the connection can implement synchronous communication of terminal devices inside and outside the network coverage in a working scenario of partial network coverage, and reduce users in and out of the network coverage. The difficulty of the connection.
  • an embodiment of the present invention uses the following technical solution:
  • a device for transmitting a synchronization signal where the first terminal device is in a network coverage.
  • Terminal device the device includes:
  • a receiving module configured to receive, by the first terminal device, a wake-up signal sent by the second terminal device, where the wake-up signal is used to trigger the terminal device to transmit a synchronization signal
  • a transmitting module configured to send, by the first terminal device, the synchronization signal.
  • the receiving module includes:
  • a receiving unit configured to receive, by the first terminal device, the wake-up signal sent by the second terminal device at a predetermined time.
  • the predetermined time is a preset time set or a time period set.
  • the wake-up signal carries group ID information, and the group ID and the carried by the wake-up signal The group ID of the first terminal device is the same.
  • the wake-up signal includes synchronization priority information
  • the sending module includes:
  • a first transmitting unit configured to: when the priority of the synchronization signal to be transmitted of the first terminal device is higher than a synchronization priority of the wake-up signal, the first terminal device transmits the synchronization signal to be transmitted.
  • the device further includes: a random number module, configured to generate a random number by the first terminal device;
  • a determining module determining whether the random number satisfies a preset condition
  • the transmitting module includes:
  • a second transmitting unit configured to: when the random number meets the preset condition, the first terminal device transmits the synchronization signal to be transmitted.
  • an embodiment of the present invention provides a device for transmitting a synchronization signal, which is used for a second terminal device, where the device includes:
  • a transmitting module configured to send, by the second terminal device, a wake-up signal, where the wake-up signal is used to trigger the terminal device to transmit a synchronization signal
  • the receiving module is configured to receive a synchronization signal sent by the first terminal device, and synchronize with the first terminal device.
  • the second terminal device has no network connection.
  • the wake-up signal carries group ID information, and the group ID carried by the wake-up signal is related to the first terminal.
  • the device's group ID is the same.
  • the wake-up signal includes synchronization priority information.
  • the embodiment of the present invention provides a method for transmitting a synchronization signal, where the first terminal device is a terminal device in a network coverage, and the method includes:
  • the first terminal device transmits a synchronization signal.
  • the receiving, by the first terminal device, the wake-up signal sent by the second terminal device includes:
  • the first terminal device receives the wake-up signal transmitted by the second terminal device at a predetermined time.
  • the predetermined time is a preset time set or a time period set.
  • the wake-up signal carries group ID information, and the group ID and the carried by the wake-up signal The group ID of the first terminal device is the same.
  • the wake-up signal includes synchronization priority information; the first terminal device transmits a synchronization signal , including:
  • the first terminal device When the priority of the synchronization signal to be transmitted of the first terminal device is higher than the synchronization priority of the wake-up signal, the first terminal device transmits the synchronization signal to be transmitted.
  • any one of the first to the fourth possible implementation manners of the third aspect, in a fifth possible implementation manner, before the first terminal device transmits the synchronization signal to be transmitted including:
  • the first terminal device generates a random number
  • the transmitting, by the first terminal device, the synchronization signal to be transmitted includes:
  • the first terminal device When the random number satisfies the preset condition, the first terminal device transmits the synchronization signal to be transmitted.
  • the embodiment of the present invention provides a method for transmitting a synchronization signal, which is used in a second terminal device, where the method includes:
  • the second terminal device transmits a wake-up signal, where the wake-up signal is used to trigger the terminal device to transmit a synchronization signal;
  • the second terminal device has no network connection.
  • the wake-up signal carries group ID information, a group ID carried by the wake-up signal, and the first terminal The device's group ID is the same.
  • the wake-up signal includes synchronization priority information.
  • the second terminal device can transmit the wake-up signal, the first terminal device receives the wake-up signal, and transmits the synchronization signal, and the second terminal device receives the synchronization transmitted by the first terminal device. Signal and synchronize with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • Users inside and outside the network coverage can also use the synchronization reference of the network to communicate, which reduces the difficulty of the connection between users inside and outside the network coverage, and reduces the interference of the network coverage boundary, and enhances the synchronization. Precision.
  • FIG. 1 is a schematic structural diagram of an apparatus for transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a specific implementation manner of an apparatus for transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of another specific implementation manner of an apparatus for transmitting a synchronization signal according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of another apparatus for transmitting a synchronization signal according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another terminal device according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 8 is a flowchart of a specific implementation manner of a method for transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 9 is a flowchart of another specific implementation manner of a method for transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 10 is a flow chart of another method for transmitting a synchronization signal according to an embodiment of the present invention.
  • the technical solution provided by the embodiment of the present invention can be applied to a working scenario of partial network coverage.
  • some terminal devices are within the network coverage, and another terminal device is outside the network coverage. Synchronizing the terminal devices inside and outside the network coverage by using the synchronization signal transmitted by the first terminal device and the wake-up signal transmitted by the second terminal device.
  • the technical solution provided by the embodiment of the present invention may also be used in a scenario in which a terminal device in a different cell in a network coverage communicates, using a synchronization signal transmitted by the first terminal device and a wake-up signal transmitted by the second terminal device to implement different cells. Synchronization of terminal device communication.
  • the embodiment of the present invention provides a device 100 for transmitting a synchronization signal, which is used for a first terminal device, and the first terminal device is a terminal device in a network coverage.
  • the device 100 includes:
  • the receiving module 101 is configured to receive, by the first terminal device, a wake-up signal sent by the second terminal device.
  • the wake-up signal is used to trigger the terminal device to transmit a synchronization signal.
  • the wake-up signal can be either a sync signal or a custom signal.
  • the first terminal device can learn the existence of the second terminal device, thereby performing a subsequent process.
  • the transmitting module 102 is configured to send, by the first terminal device, the synchronization signal.
  • the synchronization signal can enable the two terminal devices of the communication to obtain a common synchronization Reference, thereby enabling the two terminal devices of the communication to synchronize.
  • the device for transmitting a synchronization signal is provided by the embodiment of the present invention
  • the second terminal device is capable of transmitting a wake-up signal
  • the first terminal device receives the wake-up signal, and transmits the synchronization signal
  • the second terminal device receives the synchronization signal transmitted by the first terminal device, And synchronized with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • Users inside and outside the network coverage can also use the synchronization reference of the network to communicate, which reduces the difficulty of the connection between users inside and outside the network coverage, and reduces the interference of the network coverage boundary, and enhances the synchronization. Accuracy; Moreover, it is also possible to enable the terminal devices in different cells in the network coverage to perform synchronous communication; at the same time, the interference that may occur when the terminal devices are not synchronized is also avoided, and the receiving performance of the terminal device is improved.
  • the receiving module 101 and the transmitting module 102 include: a receiving unit 101 1 , configured to receive, by the first terminal device, the wake-up signal sent by the second terminal device at a predetermined time.
  • the predetermined time is a preset time set or a time period set, that is, the predetermined time may be a preset time set or a time period set of the communication system, or may be a time known in the D2D communication group. Collection or time period collection.
  • the communication system presets that the duration of receiving the wake-up signal by the first terminal device may be N times of the wake-up signal sent by the second terminal, where N is a positive integer, for example, the N-time period is 1 second, and the preset time period set is ⁇ 0.
  • the first terminal device starts from time 0 and continues to receive the wake-up signal for 1 second, and stops receiving the wake-up signal after 1 second; starts from the next time 100 in the preset time period set, and continues for 1 second. Receive wake-up signal, stop receiving wake-up signal after 1 second, and so on.
  • the wake-up signal transmitted by the second terminal device is a continuous process, and when the first terminal device receives the wake-up signal transmitted by the second terminal device at a predetermined time, the wake-up signal does not occur.
  • the first transmitting unit 1021 is configured to: when the priority of the synchronization signal to be transmitted of the first terminal device is higher than the synchronization priority of the wake-up signal, the first terminal device Transmitting the synchronization signal to be transmitted.
  • the wake-up signal includes synchronization priority information.
  • the first terminal device transmits the synchronization signal to be transmitted.
  • the first terminal device does not need to transmit the synchronization signal to be transmitted if the priority of the synchronization signal to be transmitted of the first terminal device is lower than the synchronization priority of the wake-up signal.
  • the device for transmitting a synchronization signal is provided by the embodiment of the present invention.
  • the second terminal device is capable of transmitting a wake-up signal, the first terminal device receives the wake-up signal at a predetermined time, and transmits a synchronization signal, and the second terminal device receives the first terminal device and transmits the synchronization signal.
  • the synchronization signal determines whether to transmit the synchronization signal to be transmitted according to the priority of the synchronization signal to be transmitted and the wake-up signal, and synchronizes with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • Users inside and outside the network coverage can also use the synchronization reference of the network to communicate, which reduces the difficulty of the connection between users inside and outside the network coverage, and reduces the interference of the network coverage boundary, and enhances the synchronization.
  • the device 100 further includes:
  • the random number module 103 is configured to generate a random number by the first terminal device.
  • the random number is used to determine whether the first terminal device transmits a synchronization signal to be transmitted, and the range of the random number can be set by the user. For example: Set the random number to 0 or 1.
  • the determining module 104 determines whether the random number satisfies a preset condition.
  • the preset condition can also be set by the user, for example: the random number that may be generated is 0 or 1, and the preset condition is set to 1 for the random number, and when the generated random number is 1, The random number satisfies the preset condition.
  • the transmitting module 102 includes:
  • the second transmitting unit 1022 is configured to: when the random number meets the preset condition, the first terminal device transmits the synchronization signal to be transmitted.
  • the preset condition is that the random number is 1, and when the generated random number is 1, that is, when the random number satisfies the preset condition, the first terminal device transmits the synchronization signal to be transmitted.
  • the wake-up signal carries the group ID information, and the wake-up signal carries the same group ID as the first terminal device.
  • the wake-up signal carrying the group ID information may carry a field dedicated to the group ID information; or, if the wake-up signal is a sequence, the length of the sequence, the sequence number of the sequence, or the position of the sequence may be used to correspond to the group ID. , to carry group ID information.
  • the wake-up signal is a sequence of sequence number N, and the sequence ID of the sequence N is 1 , and the wake-up signal carries a group ID of 1.
  • the device for transmitting a synchronization signal is provided by the embodiment of the present invention.
  • the second terminal device can transmit the wake-up signal, and the first terminal device receives the wake-up signal, and uses the random number generated by the first terminal device to determine whether to transmit the synchronization signal, and second.
  • the terminal device receives the synchronization signal transmitted by the first terminal device and synchronizes with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • Users inside and outside the network coverage can also use the synchronization reference of the network to communicate, which reduces the difficulty of the connection between users inside and outside the network coverage, and reduces the interference of the network coverage boundary, and enhances the synchronization. Accuracy; Moreover, it is also possible to enable the terminal devices in different cells in the network coverage to perform synchronous communication; at the same time, the interference that may occur when the terminal devices are not synchronized is also avoided, and the receiving performance of the terminal device is improved.
  • the embodiment of the present invention provides a device 200 for transmitting a synchronization signal, which is used for a second terminal device, as shown in FIG. 4, and includes:
  • the transmitting module 201 is configured to send, by the second terminal device, a wake-up signal.
  • the wake-up signal is used to trigger the terminal device to transmit a synchronization signal.
  • the terminal devices are all within the network coverage, they are different.
  • the terminal device in the neighboring cell of the cell wants to perform D2D communication with the terminal device that is transmitting the communication signal
  • the terminal device in the neighboring cell It is necessary to synchronize with the terminal device that is transmitting the communication signal at the communication time. Therefore, the terminal device in the neighboring cell needs to acquire the synchronization reference of the cell where the terminal device that is transmitting the communication signal is located, that is, the cell where the terminal device that is transmitting the communication signal is located.
  • the wake-up signal may be transmitted by the terminal device in the neighboring cell, and the terminal device of the cell where the terminal device that is transmitting the communication signal is triggered to transmit the synchronization signal.
  • the second terminal device may be a terminal device in a neighboring cell
  • the first terminal device may be a terminal device in a cell where the terminal device that is transmitting the communication signal is located.
  • the second terminal device has no network connection, that is, when the second terminal device is outside the network coverage, the wake-up signal is sent in a broadcast manner, for example, the second terminal device is disconnected from the originally connected network due to an emergency event. At this time, the second terminal device transmits a wake-up signal.
  • the second terminal device is always in a no-network connection state, and the second terminal device transmits a wake-up signal.
  • the receiving module 202 is configured to receive a synchronization signal sent by the first terminal device, and synchronize with the first terminal device.
  • the second terminal device transmits a wake-up signal in a broadcast manner, and a plurality of terminal devices may receive a wake-up signal transmitted by the second terminal device, and the terminal device that receives the wake-up signal may transmit a synchronization signal.
  • the second terminal device receives more than one synchronization signal, it selects to synchronize with the terminal device with the highest priority.
  • the wakeup signal carries the group ID information
  • the group ID carried by the wakeup signal is the same as the group ID of the first terminal device.
  • the first terminal device and the second terminal device are in the same network coverage, belong to the same group, and the first terminal device and the second terminal device have the same group ID;
  • the second The terminal device leaves the network, carries the group ID information in the wake-up signal transmitted by the second terminal device, and wakes up
  • the group ID carried by the signal is the same as the group ID of the first terminal device.
  • the wake-up signal includes synchronization priority information, and the terminal device with low priority is synchronized to the terminal device with high priority.
  • the device for transmitting a synchronization signal is provided by the embodiment of the present invention
  • the second terminal device is capable of transmitting a wake-up signal
  • the first terminal device receives the wake-up signal, and transmits the synchronization signal
  • the second terminal device receives the synchronization signal transmitted by the first terminal device, And synchronized with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • the embodiment of the present invention provides a terminal device 300, as shown in FIG.
  • At least one processor 301 such as a CPU
  • at least one communication bus 302 a memory 303
  • at least one network interface 304 or a user interface 305 a transmitting end 306 and receiving end 307.
  • Communication bus 302 is used to implement connection communication between these components.
  • the user interface 305 includes a display, a keyboard, a mouse, a touch screen, and the like.
  • Memory 303 may include high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.
  • Transmitter 306 is used to transmit a synchronization signal.
  • the receiving end 307 is configured to receive the wake-up signal transmitted by the second terminal device.
  • the memory 303 can be used to store the wake-up signal transmitted by the second terminal device and the synchronization signal transmitted by the first terminal device.
  • the memory 303 may be further configured to store the group ID carried by the wake-up signal and the group ID of the first terminal device; and may also store the synchronization priority information included in the wake-up signal and the priority of the synchronization signal to be transmitted of the first terminal device. ; can also store generated Random numbers and preset conditions.
  • the processor 301 can be configured to control the receiving end 307 to receive the wake-up signal sent by the second terminal device, where the wake-up signal is used to trigger the terminal device to transmit the synchronization signal, and to control the transmitting end 306 to transmit the synchronization signal.
  • the processor 301 is further configured to control the receiving end 307 to receive the wake-up signal sent by the second terminal device at a predetermined time.
  • the predetermined time is a preset time set or a time period set.
  • the wakeup signal carries the group ID information; the group ID carried by the wakeup signal is the same as the group ID of the first terminal device.
  • the wakeup signal includes the synchronization priority information
  • the processor 301 is further configured to: when the priority of the synchronization signal to be transmitted of the first terminal device is higher than the synchronization priority of the wakeup signal, control the transmitting end 306. Transmitting the synchronization signal to be transmitted.
  • the processor 301 may be further configured to generate a random number; and, configured to determine whether the random number satisfies a preset condition; and, to be used, when the random number satisfies the preset condition, the first The terminal device transmits the synchronization signal to be transmitted.
  • the second terminal device is capable of transmitting a wake-up signal, the first terminal device receives the wake-up signal, and transmits a synchronization signal, and the second terminal device receives the synchronization signal transmitted by the first terminal device, and the A terminal device synchronizes.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • Users inside and outside the network coverage can also use the synchronization reference of the network to communicate, which reduces the difficulty of the connection between users inside and outside the network coverage, and reduces the interference of the network coverage boundary, and enhances the synchronization.
  • Accuracy and, also, enabling terminal devices in different cells in the network coverage to perform synchronous communication; at the same time, avoiding interference that may occur when the terminal device is out of synchronization, and improving reception performance of the terminal device;
  • the device does not always receive the wake-up signal, but receives the wake-up signal at a given time, and also saves the power consumed by the first terminal device on the received signal.
  • the embodiment of the present invention provides a terminal device 400, as shown in FIG.
  • At least one processor 401 such as a CPU
  • at least one communication bus 402 a memory 403, at least one network interface 404 or a user interface 405, and a transmitting end 406 and receiving end 407.
  • Communication bus 402 is used to implement connection communication between these components.
  • the user interface 405 includes a display, a keyboard, a mouse, a touch screen, and the like.
  • the memory 403 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • Transmitter 406 is used to transmit a wake-up signal.
  • the receiving end 407 is configured to receive a synchronization signal transmitted by the first terminal device.
  • the memory 403 can be used to store the wake-up signal and the received synchronization signal; and can also be used to store the group ID information carried by the wake-up signal; and can also be used to store the synchronization priority information included in the wake-up signal.
  • the processor 401 may be configured to: the second terminal device controls the transmitting end 406 to send a wake-up signal, where the wake-up signal is used to trigger the terminal device to transmit the synchronization signal; and, to control the receiving end 407 to receive the first terminal.
  • the second terminal device has no network connection.
  • the wake-up signal carries the group ID information, and the wake-up signal carries the same group ID as the first terminal device.
  • the wake-up signal includes synchronization priority information.
  • the second terminal device is capable of transmitting a wake-up signal, the first terminal device receives the wake-up signal, and transmits a synchronization signal, and the second terminal device receives the synchronization signal transmitted by the first terminal device, and the A terminal device synchronizes.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • the embodiment of the invention provides a method for transmitting a synchronization signal, which is used for a first terminal device, and the first terminal device is a terminal device in a network coverage. As shown in FIG. 7, the method includes:
  • the first terminal device receives a wake-up signal sent by the second terminal device.
  • the wake-up signal is used to trigger the terminal device to transmit a synchronization signal.
  • the wake-up signal can be either a sync signal or a custom signal.
  • the first terminal device can learn the existence of the second terminal device, thereby performing a subsequent process.
  • the first terminal device transmits a synchronization signal.
  • the synchronization signal can cause the two terminal devices of the communication to obtain a common synchronization reference, so that the two terminal devices of the communication synchronize.
  • a method for transmitting a synchronization signal is provided by the embodiment of the present invention, the second terminal device is capable of transmitting a wake-up signal, the first terminal device receives the wake-up signal, and transmits the synchronization signal, and the second terminal device receives the synchronization signal transmitted by the first terminal device, And synchronized with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • the embodiment of the present invention further provides a specific solution of the information transmission method, where the wake-up signal includes a synchronization priority.
  • the execution process of 501 and 502 shown in FIG. 7 is further refined.
  • 501 can be implemented as 501 1
  • 502 can be implemented as 5021 .
  • the method includes:
  • the first terminal device receives the wake-up signal sent by the second terminal device at a predetermined time.
  • the predetermined time is a preset time set or a time period set, that is, the predetermined time may be a preset time set or a time period set of the communication system, or may be a time known in the D2D communication group. Collection or time period collection.
  • the communication system presets that the duration of receiving the wake-up signal by the first terminal device may be N times of the wake-up signal sent by the second terminal, where N is a positive integer, for example, the N-time period is 1 second, and the preset time period set is ⁇ 0.
  • the first terminal device starts from time 0 and continues to receive the wake-up signal for 1 second, and stops receiving the wake-up signal after 1 second; starts from the next time 100 in the preset time period set, and continues for 1 second. Receive wake-up signal, stop receiving wake-up signal after 1 second, and so on.
  • the wake-up signal transmitted by the second terminal device is a continuous process, and when the first terminal device receives the wake-up signal transmitted by the second terminal device at a predetermined time, the wake-up signal does not occur.
  • the first terminal device transmits the synchronization signal to be transmitted when the priority of the synchronization signal to be transmitted of the first terminal device is higher than the synchronization priority of the wake-up signal.
  • the wake-up signal includes synchronization priority information.
  • the priority of the to-be-transmitted synchronization signal of the first terminal device is higher than the synchronization priority of the wake-up signal, the first terminal device transmits the synchronization signal to be transmitted.
  • the first terminal device does not need to transmit the synchronization signal to be transmitted if the priority of the synchronization signal to be transmitted of the first terminal device is lower than the synchronization priority of the wake-up signal.
  • a method for transmitting a synchronization signal is provided by the embodiment of the present invention.
  • the second terminal device can transmit a wake-up signal, the first terminal device receives the wake-up signal at a predetermined time, and transmits a synchronization signal, and the second terminal device receives the first terminal device and transmits the synchronization signal.
  • the synchronization signal determines whether to transmit the synchronization to be transmitted according to the priority of the synchronization signal to be transmitted and the wake-up signal Signal and synchronize with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • the embodiment of the present invention further provides a specific method for transmitting a synchronization signal, which can add 503 and 504, and further refine the execution process of 502, and further Can be specifically refined to 5022, as shown in Figure 9, including:
  • the first terminal device generates a random number.
  • the random number is used to determine whether the first terminal device transmits a synchronization signal to be transmitted, and the range of the random number can be set by the user. For example: Set the random number to 0 or 1.
  • the preset condition can also be set by the user.
  • the random number that may be generated is 0 or 1.
  • the preset condition is set to 1 for the random number.
  • the generated random number is 1, the random number satisfies the preset. condition.
  • the first terminal device transmits the synchronization signal to be transmitted.
  • the first terminal device when the generated random number is 1, that is, when the random number satisfies the preset condition, the first terminal device transmits the synchronization signal to be transmitted.
  • the wakeup signal may carry the group ID information, and the wakeup signal carries the same group ID as the first terminal device.
  • the wake-up signal carrying the group ID information may be To carry a field dedicated to the group ID information; or, if the wake-up signal is a sequence, the group ID information may be carried by using the correspondence between the length of the sequence, the sequence number of the sequence, or the position of the sequence and the group ID.
  • the wake-up signal is a sequence of sequence number N, and the group ID corresponding to the sequence number N of the sequence is 1, and the group ID carried by the wake-up signal is 1.
  • a method for transmitting a synchronization signal is provided by an embodiment of the present invention.
  • the second terminal device can transmit a wake-up signal, and the first terminal device receives the wake-up signal, and uses the random number generated by the first terminal device to determine whether to transmit the synchronization signal, and second.
  • the terminal device receives the synchronization signal transmitted by the first terminal device and synchronizes with the first terminal device.
  • the solution utilizes a wake-up signal and a synchronization signal between the first terminal device and the second terminal device, so that the second terminal device can synchronize with the first terminal device, even in a working scenario of partial network coverage.
  • An embodiment of the present invention provides a method for transmitting a synchronization signal, which is used in a second terminal device, as shown in FIG. 10, and includes:
  • the second terminal device sends a wake-up signal.
  • the wake-up signal is used to trigger the terminal device to transmit a synchronization signal.
  • the terminal devices are all in the network coverage but are in different non-synchronized cells
  • the terminal device in the neighboring cell of the cell wants to be The terminal device transmitting the communication signal performs D2D communication, and the terminal device in the neighboring cell needs to synchronize with the terminal device that is transmitting the communication signal at the communication time. Therefore, the terminal device in the neighboring cell needs to acquire the terminal device where the communication signal is being transmitted.
  • the synchronization reference of the cell that is, the synchronization signal transmitted by the base station of the cell where the terminal device that is transmitting the communication signal is located, but in this case, the terminal device in the neighboring cell cannot correctly receive the base of the different cell.
  • the wake-up signal may be transmitted by the terminal device in the neighboring cell, and the terminal device of the cell where the terminal device that is transmitting the communication signal is triggered to transmit the synchronization signal.
  • the second terminal device may be a terminal device in a neighboring cell
  • the first terminal device may be a terminal device in a cell where the terminal device that is transmitting the communication signal is located.
  • the second terminal device has no network connection, that is, when the second terminal device is outside the network coverage, the wake-up signal is sent in a broadcast manner, for example, the second terminal device is disconnected from the originally connected network due to an emergency event. At this time, the second terminal device transmits a wake-up signal.
  • the second terminal device is always in a no-network connection state, and the second terminal device transmits a wake-up signal.
  • the second terminal device transmits a wake-up signal in a broadcast manner, and a plurality of terminal devices may receive a wake-up signal transmitted by the second terminal device, and the terminal device that receives the wake-up signal may transmit a synchronization signal.
  • the second terminal device receives more than one synchronization signal, it selects to synchronize with the terminal device with the highest priority.
  • the wakeup signal may carry the group ID information, and the wakeup signal carries the same group ID as the first terminal device.
  • the first terminal device and the second terminal device are in the same network coverage, belong to the same group, and the first terminal device and the second terminal device have the same group ID;
  • the second The terminal device is out of the network, and the group ID information is carried in the wake-up signal transmitted by the second terminal device, and the group ID carried by the wake-up signal is the same as the group ID of the first terminal device.
  • the wake-up signal includes synchronization priority information, and the terminal device with low priority is synchronized to the terminal device with high priority.
  • a method for transmitting a synchronization signal is provided by the embodiment of the present invention, the second terminal device is capable of transmitting a wake-up signal, the first terminal device receives the wake-up signal, and transmits the synchronization signal, and the second terminal device receives the synchronization signal transmitted by the first terminal device, And synchronized with the first terminal device.
  • the solution is in the first terminal device and the second terminal.
  • the wake-up signal and the synchronization signal are used between the devices, so that the second terminal device can synchronize with the first terminal device. Even in a working scenario of partial network coverage, users in and out of the network coverage can use the synchronization reference of the network.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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 dispositif d'émission d'un signal de synchronisation, se rapportant au domaine technique des communications, et permettant de mettre en œuvre une communication synchrone de dispositifs terminaux à l'intérieur et à l'extérieur d'une plage de couverture de réseau, réduisant ainsi la difficulté de contact entre des utilisateurs à l'intérieur et à l'extérieur de la plage de couverture de réseau. Le procédé comprend les étapes suivantes : l'émission, par un second dispositif terminal, d'un signal de réveil; la réception, par un premier dispositif terminal, du signal de réveil émis par le second dispositif terminal; l'émission, par le premier dispositif terminal, d'un signal de synchronisation; la réception, par le second dispositif terminal, du signal de synchronisation émis par le premier dispositif terminal, et la mise en œuvre d'une synchronisation avec le premier dispositif terminal. La présente invention est appropriée pour un scénario dans lequel des dispositifs terminaux à l'intérieur et à l'extérieur d'une plage de couverture de réseau mettent en œuvre une communication synchrone, et également pour un scénario dans lequel des dispositifs terminaux dans des cellules différentes à l'intérieur d'un réseau mettent en œuvre une synchronisation.
PCT/CN2014/071363 2014-01-24 2014-01-24 Procédé et dispositif d'émission de signal de synchronisation Ceased WO2015109524A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2014/071363 WO2015109524A1 (fr) 2014-01-24 2014-01-24 Procédé et dispositif d'émission de signal de synchronisation
CN201480000634.5A CN105379375A (zh) 2014-01-24 2014-01-24 一种发射同步信号的方法及装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/071363 WO2015109524A1 (fr) 2014-01-24 2014-01-24 Procédé et dispositif d'émission de signal de synchronisation

Publications (1)

Publication Number Publication Date
WO2015109524A1 true WO2015109524A1 (fr) 2015-07-30

Family

ID=53680631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/071363 Ceased WO2015109524A1 (fr) 2014-01-24 2014-01-24 Procédé et dispositif d'émission de signal de synchronisation

Country Status (2)

Country Link
CN (1) CN105379375A (fr)
WO (1) WO2015109524A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110167107A (zh) * 2018-02-12 2019-08-23 维沃移动通信有限公司 信息传输方法、网络设备及终端

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3619987B1 (fr) * 2017-05-04 2021-11-24 Sony Group Corporation Appareil de télécommunication et procédés de transmission d'un signal de réveil comprenant une signalisation de synchronisation
CN113365325B (zh) * 2021-05-18 2023-07-04 南京大鱼半导体有限公司 数据传输方法、装置、存储介质及电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102783211A (zh) * 2010-03-05 2012-11-14 诺基亚公司 直接对等通信的切换
CN103108389A (zh) * 2011-11-15 2013-05-15 中兴通讯股份有限公司 设备到设备的通信方法和系统、用户设备
WO2013083197A1 (fr) * 2011-12-08 2013-06-13 Nokia Siemens Networks Oy Synchronisation en réseau pour des dispositifs dans une grappe d2d
CN103200634A (zh) * 2012-01-05 2013-07-10 华为技术有限公司 小区间切换的方法及装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101541106B (zh) * 2008-03-17 2012-04-18 中兴通讯股份有限公司 一种无线通信系统中的中继方法
US20120163278A1 (en) * 2010-12-24 2012-06-28 Electronics And Telecommunications Research Institute Method for performing direct communication between terminals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102783211A (zh) * 2010-03-05 2012-11-14 诺基亚公司 直接对等通信的切换
CN103108389A (zh) * 2011-11-15 2013-05-15 中兴通讯股份有限公司 设备到设备的通信方法和系统、用户设备
WO2013083197A1 (fr) * 2011-12-08 2013-06-13 Nokia Siemens Networks Oy Synchronisation en réseau pour des dispositifs dans une grappe d2d
CN103200634A (zh) * 2012-01-05 2013-07-10 华为技术有限公司 小区间切换的方法及装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110167107A (zh) * 2018-02-12 2019-08-23 维沃移动通信有限公司 信息传输方法、网络设备及终端
CN110167107B (zh) * 2018-02-12 2020-10-20 维沃移动通信有限公司 信息传输方法、网络设备及终端

Also Published As

Publication number Publication date
CN105379375A (zh) 2016-03-02

Similar Documents

Publication Publication Date Title
US10841865B2 (en) Method and apparatus for transmitting D2D discovery signal and communication system
EP4333556A3 (fr) Procédé et dispositif d'établissement de connectivité double
CN105580456B (zh) 用于无线设备同步的方法和装置
JP2015023472A5 (fr)
WO2013174154A1 (fr) Procédé, dispositif et système de recherche de dispositif formant terminal
WO2014106498A1 (fr) Procédé, dispositif et système d'émission de séquences de préambules
CN104703164B (zh) 一种获取同步参考的方法、发送同步信息的方法及设备
CN102932044A (zh) 多用户协作传输方法、用户设备和基站
WO2017166313A1 (fr) Procédé de radiomessagerie basé sur un spectre sans licence et équipement associé
CN111328134B (zh) 同步方法及装置、网元、计算机存储介质
WO2015062059A1 (fr) Procédé et dispositif de réglage de l'avance en temps
CN105101391A (zh) D2d系统中同步源协调、调整以及竞争同步源的方法和装置
CN109996325B (zh) 一种无线传感器网络的时钟同步系统及方法
WO2016019864A1 (fr) Procédé de réception de données de communication de dispositif à dispositif, procédé d'envoi, et dispositif
WO2014180426A1 (fr) Procédé d'émission d'un signal de découverte entre dispositifs et équipement d'utilisateur
WO2018170920A1 (fr) Procédé et appareil de traitement du signal
CN107027166B (zh) 一种节点的同步信息的发送方法、装置及节点
WO2015109524A1 (fr) Procédé et dispositif d'émission de signal de synchronisation
CN114363943B (zh) 用于确定传输时延的方法和电子设备
WO2014012259A1 (fr) Procédé, station de base et système pour obtenir une configuration de duplexage par répartition temporelle d'une cellule auxiliaire
WO2015042955A1 (fr) Procédé et appareil de synchronisation
WO2015043357A1 (fr) Dispositif d'équipement utilisateur et procédé
CN110831171B (zh) 传输资源确定方法及装置、电子设备及存储介质
WO2018170701A1 (fr) Procédé de transmission d'informations système, station de base, et terminal
CN105207752A (zh) 一种信号发送和检测的方法及装置

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: 14879958

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: 14879958

Country of ref document: EP

Kind code of ref document: A1