WO2017117811A1 - Procédé d'émission de signaux et dispositif de terminal - Google Patents

Procédé d'émission de signaux et dispositif de terminal Download PDF

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Publication number
WO2017117811A1
WO2017117811A1 PCT/CN2016/070508 CN2016070508W WO2017117811A1 WO 2017117811 A1 WO2017117811 A1 WO 2017117811A1 CN 2016070508 W CN2016070508 W CN 2016070508W WO 2017117811 A1 WO2017117811 A1 WO 2017117811A1
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WIPO (PCT)
Prior art keywords
signal
synchronization signal
side line
symbols represent
dmrs
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PCT/CN2016/070508
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English (en)
Chinese (zh)
Inventor
赵振山
刘德平
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华为技术有限公司
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Priority to PCT/CN2016/070508 priority Critical patent/WO2017117811A1/fr
Publication of WO2017117811A1 publication Critical patent/WO2017117811A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the embodiments of the present invention relate to data transmission technologies, and in particular, to a signal transmission method and a terminal device.
  • D2D Device-to-Device
  • Communication between terminal devices no longer requires the relay of the base station to directly communicate.
  • the base station can perform resource configuration. Scheduling and coordination, etc., to facilitate direct communication between terminal devices.
  • each subframe includes 14 orthogonal frequency division multiplexing (Orthogonal Frequency).
  • OFDM Orthogonal frequency division multiplexing
  • PSSS Primary Sidelink Synchronization Signal
  • DMRS demodulation reference signal
  • SSSS Side Side Synchronization Signal
  • GAP gap
  • Other symbols are used. Transmit PSBCH data.
  • the terminal network is moving at a high speed, and the highest relative moving speed between each two vehicles can reach 280 km/h, and the interval between two pilots in the PSBCH pilot structure of the D2D system. Far exceeds the channel coherence time required by the Internet of Vehicles system, so that channel estimation and realism on other symbols obtained by interpolation using channel estimates of two pilot symbols The channels vary greatly, resulting in an increase in the bit error rate at the receiving end and a failure in data transmission.
  • the embodiment of the invention provides a signal transmission method and a terminal device, so as to solve the time interval of two pilot signals in the PSBCH pilot structure of the D2D system, which far exceeds the channel coherence time required by the vehicle network system, so that two guides are utilized.
  • the channel estimation on the other symbols obtained by interpolating the channel estimation of the frequency symbol is greatly different from the real channel, thereby causing an increase in the bit error rate at the receiving end and a problem of data transmission failure.
  • a first aspect of the present invention provides a signal transmission method, including:
  • the first signal includes a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two positive Interleaving the OFDM symbol by frequency division, and another DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols;
  • the method further includes:
  • the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , fifth, seventh, eighth and tenth symbols represent transmitted data signals, twelfth and Thirteen symbols represent the side line sync signal, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the first pilot structure includes a pilot scheme of a normal CP or a guide of an extended CP Frequency scheme
  • each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols as gaps;
  • Each of the pilot schemes of the extended CP includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, fourth, sixth, eighth, and The ninth symbol represents the transmitted data signal, the fifth and seventh symbols represent the DMRS, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the acquiring the first parameter information of the side line synchronization signal of the first system and the side line synchronization signal of the second system Two parameter information, including:
  • the first system is a vehicle networking communication system; and the second system is a device-to-device D2D communication system.
  • a second aspect of the present invention provides a data signal transmission method, including:
  • the first signal is a side line synchronization signal that is generated by the first terminal device in the first system according to the first pilot structure and includes the first system Demodulating a reference signal DMRS and a transmission signal of the data signal; wherein the side line synchronization signal comprises a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure Two DMRSs are included in one subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is separated from the side-line secondary synchronization signal by two OFDM symbols.
  • the method further includes:
  • the second signal is a side of the first system that is generated by the first terminal device in the first system according to the second pilot structure, including the first system a transmission signal of a line sync signal, a DMRS, and a data signal;
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • a third aspect of the present invention provides a terminal device, including:
  • An acquiring module configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;
  • a determining module configured to determine, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;
  • a processing module configured to generate, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system;
  • the side line synchronization signal, the demodulation reference signal DMRS, and the data signal of the first system are included; wherein the side line synchronization signal comprises a side line main synchronization signal and a side line secondary synchronization signal; and the first pilot structure is adopted
  • the first signal includes two DMRSs in each subframe, and one of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side-line secondary synchronization signal by two. OFDM symbol;
  • a sending module configured to send the first signal to a second terminal device in the first system.
  • the processing module is further configured to: if a resource of a side line synchronization signal of the first system and a side line synchronization signal of the second system Generating the second signal according to the second pilot structure; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;
  • the sending module is further configured to send the second signal to the second terminal device of the first system
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the first pilot structure includes a pilot scheme of a normal CP or a pilot scheme of an extended CP;
  • each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols as gaps;
  • Each of the pilot schemes of the extended CP includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, fourth, sixth, eighth, and The ninth symbol represents the transmitted data signal, the fifth and seventh symbols represent the DMRS, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the acquiring module includes:
  • a receiving unit configured to receive first parameter information of a side line synchronization signal of the first system and a second parameter information of a side line synchronization signal of the second system that are broadcast by the base station;
  • a processing unit configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
  • a fourth aspect of the present invention provides a terminal device, including:
  • An acquiring module configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;
  • a determining module configured to determine, according to the first parameter information and the second parameter information, whether resources of a side line synchronization signal of the first system and resources of a side line synchronization signal of the second system are the same;
  • a receiving module configured to receive, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system; a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization The signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two The OFDM symbols are orthogonally frequency division multiplexed, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.
  • the receiving module is further configured to: if a resource of a side line synchronization signal of the first system and a side line synchronization signal of the second system Receiving a second signal according to the second pilot structure; the second signal is generated by the first terminal device in the first system according to the second pilot structure, including the first system a side line sync signal, a DMRS, and a data signal transmission signal;
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , fifth, seventh, eighth and tenth symbols represent transmitted data signals, twelfth and Thirteen symbols represent the side line sync signal, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • a fifth aspect of the present invention provides a terminal device, including: a processor for controlling execution of executable instructions, a memory for storing executable instructions of the processor, and a transmitter;
  • the processor is used to:
  • the first signal includes a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two positive Interleaving the OFDM symbol by frequency division, and another DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols;
  • the transmitter is configured to send the first signal to a second terminal device in the first system.
  • a sixth aspect of the present invention provides a terminal device, including: a processor for controlling execution of executable instructions, a memory for storing processor-executable instructions, and a receiver;
  • the processor is used to:
  • the receiver is configured to receive a first signal according to a first pilot structure if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are different; the first signal a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization
  • the signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two
  • the OFDM symbols are orthogonally frequency division multiplexed, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.
  • the method for transmitting a signal and the terminal device determine whether the resources of the side line synchronization signals of the first system and the second system are the same through the first parameter information of the first system and the second parameter information of the second system. If the same, the time domain density of the demodulation reference signal is increased, that is, the number of symbols of the interval between the demodulation reference signals is reduced, and when the synchronization resources of the first system and the second system side are different, the pilot overhead is not maintained. Changing the position of the demodulation reference signal can overcome the influence of high Doppler spread in the first system, shorten the time interval between demodulation reference signals, and maintain the channel coherence time range of the first system, effectively reducing reception. The bit error rate of the terminal.
  • PSCH Physical Sidelink Broadcast Channel
  • Embodiment 1 is a flowchart of Embodiment 1 of a method for transmitting a signal according to the present invention
  • FIG. 3a is a schematic diagram of a frame structure of a normal cyclic prefix (Cyclic Prefix, CP) in a first pilot structure.
  • CP Cyclic Prefix
  • FIG. 3b is a schematic diagram of a frame structure of an extended CP in a first pilot structure
  • Embodiment 4 is a flowchart of Embodiment 2 of a method for transmitting a signal according to the present invention
  • 5a is a schematic diagram of a first frame structure of a normal CP in a second pilot structure
  • FIG. 5b is a schematic diagram of a second frame structure of a normal CP in a second pilot structure
  • 5c is a schematic diagram of a third frame structure of a normal CP in a second pilot structure
  • FIG. 5d is a schematic diagram of a frame structure of an extended CP in a second pilot structure
  • Embodiment 6 is a flowchart of Embodiment 3 of a method for transmitting a signal according to the present invention.
  • FIG. 7 is a schematic diagram of time division multiplexing of a D2D system and an LTE-V system
  • FIG. 8 is a schematic diagram of shared resources of a D2D system and an LTE-V system
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of a terminal device according to the present invention.
  • FIG. 10 is a schematic structural diagram of Embodiment 2 of a terminal device according to the present invention.
  • FIG. 11 is a schematic structural diagram of Embodiment 3 of a terminal device according to the present invention.
  • FIG. 12 is a schematic structural diagram of an example of a terminal device provided by the present invention.
  • FIG. 13 is a schematic structural diagram of still another example of a terminal device according to the present invention.
  • the signal transmission method provided by the present invention is mainly applied when there are transmission mechanisms of two communication systems, for example, an LTE D2D system and a vehicle networking system (also referred to as an LTE-V system) established based on D2D communication, preferably
  • the application is in the Internet of Vehicles (with or without base station participation).
  • Several new pilot schemes are proposed, which can avoid the Doppler spread caused by high carrier frequency and high moving speed, and can also reduce the transmission error rate on the PSBCH.
  • the specific implementation scheme is as follows:
  • the execution entity of the embodiment is a first terminal device of the sending end, for example, a smart terminal device such as a mobile phone or a tablet computer, or a vehicle, and the first terminal device can communicate with the base station or can directly communicate with other terminal devices.
  • the transmission method of the signal specifically includes:
  • S101 Acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
  • the first parameter information of the side line synchronization signal of the first system and the second parameter information of the side line synchronization signal of the second system that are broadcast by the base station are received.
  • the base station has the function of radio resource management, and can communicate with the first terminal device, or can be used as a central controller to assist communication between the terminal devices.
  • the base station may perform configuration on the transmission resource of the controlled terminal device, and broadcast the configured parameter information, where the first parameter information includes frequency domain information and time domain information of the side line synchronization signal transmission of the first system;
  • the parameter information includes time domain information and frequency domain information of the side line sync signal data transmission of the second system. This refers to some parameters of the side-line sync signal.
  • the first parameter information of the side line synchronization signal of the first system and the second parameter information of the side line synchronization signal of the second system are obtained.
  • the user can manually configure the required parameter information in the terminal device according to requirements.
  • the resource pool information can also be obtained according to the foregoing two methods.
  • S102 Determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same.
  • comparing the carrier frequency information and the subframe information of the first system and the second system for transmitting the side line synchronization signal determining that the side channel synchronization signal resources of the first system and the second system are the same when the carrier frequency information and the subframe information are the same. Otherwise, the resources are judged differently.
  • the first signal includes a side line synchronization signal, a DMRS, and a data signal of the first system.
  • the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs The side row primary synchronization signal is spaced by two orthogonal frequency division multiplexed OFDM symbols, and the other The DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.
  • one of the DMRSs is located after the side line main synchronization signal, and is separated from the last side line main synchronization signal by two orthogonal frequency division multiplexing OFDM symbols; the other is located in the side line auxiliary Before the synchronization signal, and separated from the first side-line secondary synchronization signal by two OFDM symbols.
  • S104 Send the first signal to a second terminal device in the first system.
  • the D2D system (equivalent to the second system) and the LTE-V system (equivalent to the first system) are taken as an example to describe the solution.
  • the first terminal device is configured by the base station broadcast or by pre-configuration. Parameter information of the sideline synchronization signal (SLSS) of the D2D system and LTE-V.
  • SLSS sideline synchronization signal
  • the first terminal device determines whether the side line synchronization signal resource of the D2D system is synchronized with the side line of the LTE-V system according to the received side line synchronization signal parameter information broadcasted by the base station or according to the preconfigured side line synchronization signal parameter information.
  • the signal resources are the same.
  • FIG. 3a is a schematic diagram of a frame structure of a normal CP in a first pilot structure
  • FIG. 3b is a schematic diagram of a frame structure of an extended CP in a first pilot structure. That is, the first pilot structure includes a pilot scheme of a normal CP or a pilot scheme of an extended CP.
  • each subframe includes fourteen OFDM symbols, and the second and third symbols represent a side-line primary synchronization signal (PSSS in the figure), first, first The four, fifth, seventh, eighth, tenth, and eleventh symbols represent transmitted data signals, and the sixth and ninth symbols represent DMRS, twelfth and thirteenth The symbol indicates the side line sync signal (SSSS in the figure), and the fourteenth symbol is used as the gap;
  • PSSS side-line primary synchronization signal
  • SSSS side-line primary synchronization signal
  • each subframe in the extended CP pilot scheme includes twelve OFDM symbols, and the first and second symbols represent side-line primary synchronization signals (PSSS in the figure), third and fourth.
  • the sixth, eighth, and ninth symbols represent the transmitted data signals, the fifth and seventh symbols represent the DMRS, and the tenth and eleventh symbols represent the side-segment sync signals (in the figure) SSSS), the twelfth symbol as a gap.
  • the figure shows different signals to be sent on different time-frequency resources.
  • the LTE-V system may be used for the LTE-V system.
  • the frame structure shown in FIG. 3a or FIG. 3b is used to generate a transmission signal, that is, the first signal, and then the signal is sent to the second terminal device.
  • the implementation manner is similar to that of the terminal device at the transmitting end.
  • the parameter information of each system is obtained in advance, and the parameter information is used to determine whether the first system and the second system use the same synchronization resource. If not, the first signal is received according to the first pilot structure.
  • the method for transmitting a signal provides a manner for determining whether the synchronization signal resources are the same according to the parameter information, and provides a new pilot scheme, which reduces the time domain density of the demodulation reference signal, that is, reduces the demodulation.
  • the number of symbols in the interval between reference signals, when the resources are different, the pilot overhead is kept unchanged, and the position of the demodulation reference signal is changed, which can overcome the influence of high Doppler spread in the first system and shorten the time of demodulating the reference signal.
  • the interval is maintained within the channel coherence time range of the first system, effectively reducing the bit error rate at the receiving end.
  • FIG. 4 is a flowchart of Embodiment 2 of a method for transmitting a signal according to the present invention.
  • the execution subject of the embodiment is a first terminal device at a transmitting end, and the specific implementation steps of the signal transmission method include:
  • S201 Acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
  • S202 Determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same.
  • the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system.
  • the D2D system (equivalent to the second system) and the LTE-V system (equivalent to the first system) are taken as an example, when the first terminal device determines the LTE-V.
  • the second pilot structure is used to generate the second signal.
  • the resources of the synchronization signal are the same, that the two systems use the proprietary carrier of the LTE-V system, for example, the dedicated carrier configured as the LTE-V system at a frequency of 5.9 GHz, 6 GHz, etc., and the two systems transmit the synchronization signal.
  • the time domain resource and the frequency domain resource are the same.
  • each subframe of the generated second signal using the second pilot structure is any one of the following four structures:
  • FIG. 5a is a schematic diagram of a first frame structure of a normal CP in a second pilot structure.
  • the first seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent a side row master.
  • Synchronization signal ie PSSS in the figure
  • the fourth, sixth, ninth and eleventh symbols represent the DMRS
  • the first, fifth, seventh, eighth and tenth symbols Representing the transmitted data signal
  • the twelfth and thirteenth symbols represent the side line sync signal (ie SSSS in the figure) and the fourteenth symbol acts as a gap.
  • FIG. 5b is a schematic diagram of a second frame structure of a normal CP in a second pilot structure.
  • the second seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization.
  • the signal ie PSSS in the figure
  • the fourth, seventh and tenth symbols represent the DMRS
  • the transmitted data signal, the twelfth and thirteenth symbols represent the side-segment sync signal (ie SSSS in the figure), and the fourteenth symbol acts as a gap.
  • 5c is a schematic diagram of a third frame structure of a normal CP in a second pilot structure.
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization.
  • the signal ie PSSS in the figure
  • the first, fourth, sixth, seventh, ninth and tenth symbols represent the transmitted data signal
  • fifth, eighth and eleventh The symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal (ie SSSS in the figure)
  • the fourteenth symbol acts as a gap.
  • FIG. 5d is a schematic diagram of a frame structure of an extended CP in a second pilot structure.
  • the frame structure is a fourth frame structure in a second pilot structure
  • the fourth seed frame structure includes twelve OFDM symbol
  • the first and second symbols represent the side-line primary synchronization signal (ie PSSS in the figure)
  • the third, sixth and ninth symbols represent the DMRS
  • the eighth and eighth symbols represent the transmitted data signals
  • the tenth and eleventh symbols represent the side-wave sync signal (ie SSSS in the figure)
  • the twelfth symbol acts as a gap.
  • S204 Send the second signal to the second terminal device of the first system.
  • the first terminal device may generate a transmission signal, that is, the foregoing second signal, according to any one of the second pilot structures. Send it. That is, using any of the frame structures of Figures 5a-5d for synchronizing signals and PSBCH
  • the implementation manner is similar to that of the transmitting end, and the parameter information of the side line synchronization signal of the first system and the second system is obtained in advance, and whether the synchronization signals of the first system and the second system use the same If the resources are different, the first pilot structure is used for receiving, and if they are the same, the second pilot structure is used for receiving.
  • the first terminal device of the sending end specifically selects which one of the foregoing frame structures may be configured in advance or is specified by a protocol, and may also be determined by a message broadcasted by the base station, and the application does not do this. limit.
  • the signal transmission method provided by this embodiment designs a pilot scheme of a new PSBCH channel by using parameter information of resources of different systems, which can overcome the influence of Doppler spread in a high-speed system such as an LTE-V system, and reduce the system.
  • the bit error rate of signal transmission can also reduce the pilot overhead.
  • FIG. 6 is a flowchart of Embodiment 3 of a method for transmitting a signal according to the present invention.
  • the execution entity of this embodiment is a second terminal device at a receiving end, and the second terminal device may be a mobile phone or a tablet computer.
  • vehicles and other equipment, the specific implementation steps of the signal transmission method include:
  • S301 Acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
  • S302 Determine, according to the first parameter information and the second parameter information, whether resources of the side line synchronization signal of the first system and resources of the side line synchronization signal of the second system are the same.
  • the first signal is a side line that is generated by the first terminal device in the first system according to the first pilot structure, including the first system The transmission signal of the synchronization signal, DMRS and data signal.
  • the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the subframes adopting the first pilot structure includes two DMRSs, and One of the DMRSs is separated from the side-line primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side-line secondary synchronization signal by two OFDM symbols.
  • S304 if yes, receiving a second signal according to the second pilot structure; the second signal is generated by the first terminal device in the first system according to the second pilot structure, including the first system The side line sync signal, the DMRS and the data signal transmission signal.
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side lines
  • the primary synchronization signal, the fourth, sixth, ninth and eleventh symbols represent the DMRS, and the first, fifth, seventh, eighth and tenth symbols represent the transmitted data signals,
  • the twelfth and thirteenth symbols represent side line sync signals, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the terminal device for the receiving end is similar to the terminal device at the transmitting end, and also acquires parameter information of the first system and the second system in advance, and determines resources used by the synchronization signals of the first system and the second system according to the parameter information. If the information is different, the first pilot structure is used to receive the signal. If the information is the same, the second pilot structure is used for receiving the signal.
  • the specific pilot scheme is described in the foregoing Embodiment 1 and Embodiment 2. Similar to the terminal device on the transmitting end, the frame structure of the above-mentioned ones may be pre-configured or specified by the protocol, or may be determined by the indication of the notification message sent by the base station, which is not limited in this application.
  • a dedicated carrier is allocated for the LTE-V system to transmit the vehicle network
  • the LTE system adopts a carrier of 2.6 GHz
  • the LTE-V system adopts a carrier of 5.9 GHz on the carrier of 5.9 GHz.
  • the D2D system and the LTE-V system work on different carriers. Therefore, the pilot of the PSBCH subframe of the LTE-V system can adopt the subframe structure in the foregoing first pilot structure.
  • FIG. 7 is a schematic diagram of time division multiplexing of a D2D system and an LTE-V system, if the base station is configured
  • the D2D system and the LTE-V system work on one carrier, and the transmission resources of the two are time-division, as shown in FIG. 7.
  • the PSBCH subframe of the LTE-V system can adopt the pilot structure of the first pilot structure. .
  • FIG. 8 is a schematic diagram of shared resources of a D2D system and an LTE-V system. If the base station configures the D2D system and the LTE-V system to work on one carrier, and the synchronization signal transmission resources of the two overlap in time, as shown in FIG. At this time, the PSBCH subframe of the LTE-V system adopts the pilot structure shown in FIG. 5a to FIG. 5d, and the specific pilot structure may be configured by the base station, and the protocol specifies or is pre-configured.
  • the horizontal axis t represents time
  • the vertical axis f represents frequency
  • D represents a D2D system
  • V represents an LTE-V system.
  • the signal transmission method provided by the present invention designs a new PSBCH channel pilot structure. Compared to the Rel-12PSBCH pilot structure, this scheme increases the pilot density to overcome the effects of Doppler spread when the D2D and LTE-V synchronization resources are the same. When the D2D and LTE-V synchronization resources are different, the pilot overhead is kept unchanged, the pilot position is changed, the time interval between the pilot signals is shortened, the bit error rate at the receiving end is reduced, and the data transmission efficiency is improved.
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of a terminal device according to the present invention. As shown in FIG. 9, the terminal device 10 includes:
  • the obtaining module 11 is configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;
  • the determining module 12 is configured to determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same;
  • the processing module 13 is configured to generate a first signal according to the first pilot structure, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system;
  • the signal includes a side line sync signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line sync signal includes a side line main sync signal and a side line sub sync signal; using the first pilot
  • the first signal of the structure includes two DMRSs in each subframe, and one of the DMRSs is separated from the side row primary synchronization signal by two orthogonal frequency division multiplexing OFDM symbols, and the other DMRS is spaced apart from the side line secondary synchronization signal by two. OFDM symbols;
  • a sending module 14 configured to send the first signal to a second terminal in the first system Ready.
  • the processing module 13 is further configured to: if the resources of the side line synchronization signal of the first system and the resources of the side line synchronization signal of the second system are the same, generate a second according to the second pilot structure. a signal; the second signal includes a side line synchronization signal, a DMRS, and a data signal of the first system;
  • the sending module 14 is further configured to send the second signal to the second terminal device of the first system
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the first pilot structure includes a pilot scheme of a normal CP or a pilot scheme of an extended CP;
  • each subframe includes fourteen OFDM symbols, and the second and third symbols represent side-line primary synchronization signals, first, fourth, fifth, and seventh. , eighth, tenth and eleventh symbols represent transmitted data signals, sixth and ninth symbols represent DMRS, and twelfth and thirteenth symbols represent side-slot sync signals, Fourteen symbols As a gap;
  • Each of the pilot schemes of the extended CP includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, fourth, sixth, eighth, and The ninth symbol represents the transmitted data signal, the fifth and seventh symbols represent the DMRS, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • FIG. 10 is a schematic structural diagram of Embodiment 2 of a terminal device according to the present invention.
  • the acquiring module 11 includes:
  • the receiving unit 111 is configured to receive first parameter information of a side line synchronization signal of the first system and a second parameter information of a side line synchronization signal of the second system that are broadcast by the base station;
  • the processing unit 112 is configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system.
  • the terminal device provided in this embodiment is used to perform the technical solution of the method embodiment shown in FIG. 1 to FIG. 5d, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of Embodiment 3 of a terminal device according to the present invention. As shown in FIG. 11, the terminal device 20 includes:
  • the obtaining module 21 is configured to acquire first parameter information of a side line synchronization signal of the first system and second parameter information of a side line synchronization signal of the second system;
  • the determining module 22 is configured to determine, according to the first parameter information and the second parameter information, whether resources of the side synchronization signal of the first system and resources of the side synchronization signal of the second system are the same;
  • the receiving module 23 is configured to receive, according to the first pilot structure, a first signal, if the resource of the side line synchronization signal of the first system is different from the resource of the side line synchronization signal of the second system;
  • the signal is a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line
  • the synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal. Two orthogonal frequency division multiplexed OFDM symbols, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.
  • the receiving module 23 is further configured to: if the resource of the side line synchronization signal of the first system and the resource of the side line synchronization signal of the second system are the same, receive the second according to the second pilot structure. a signal that is generated by the first terminal device in the first system according to the second pilot structure, including a side line synchronization signal, a DMRS, and a data signal of the first system;
  • each subframe of the second signal adopting the second pilot structure is any one of the following four structures:
  • the first seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side-line primary synchronization signals, and the fourth, sixth, ninth, and eleventh symbols represent DMRS, the first , the fifth, seventh, eighth and tenth symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the second seed frame structure includes fourteen OFDM symbols, the second and third symbols represent side row primary synchronization signals, and the fourth, seventh and tenth symbols represent DMRS, first, fifth, The sixth, eighth, ninth, and eleventh symbols represent transmitted data signals, the twelfth and thirteenth symbols represent side-line spoke sync signals, and the fourteenth symbol acts as a gap;
  • the third seed frame structure includes fourteen OFDM symbols, and the second and third symbols represent side row primary synchronization signals, first, fourth, sixth, seventh, ninth, and tenth
  • the symbol indicates the transmitted data signal
  • the fifth, eighth and eleventh symbols represent the transmitted DMRS
  • the twelfth and thirteenth symbols represent the side line sync signal
  • the fourteenth symbol acts as the gap
  • the fourth seed frame structure includes twelve OFDM symbols, the first and second symbols represent side-line primary synchronization signals, and the third, sixth, and ninth symbols represent DMRS, fourth, fifth, The seventh and eighth symbols represent the transmitted data signal, the tenth and eleventh symbols represent the side-line sync signal, and the twelfth symbol acts as a gap.
  • the terminal device provided in this embodiment is used to perform the technical solution of the method embodiment shown in FIG. 6.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • the modules described as separate components may or may not be physically separated.
  • the components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.
  • FIG. 12 is a schematic structural diagram of an example of a terminal device according to the present invention. As shown in FIG. 12, the terminal device may be specifically implemented as: a processor for controlling execution of executable instructions, and a processor for storing processor executable instructions. Memory and transmitter;
  • the processor is used to:
  • the first signal includes a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system; wherein the side line synchronization signal includes a side line primary synchronization signal and a side line secondary synchronization signal; each of the first signals using the first pilot structure includes two DMRSs, and one of the DMRSs is spaced apart from the side line primary synchronization signal by two positive Interleaving the OFDM symbol by frequency division, and another DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols;
  • the transmitter is configured to send the first signal to a second terminal device in the first system.
  • FIG. 13 is a schematic structural diagram of still another example of a terminal device according to the present invention.
  • the terminal device may be specifically implemented as: a processor for controlling execution of executable instructions, and a processor executable instruction.
  • the processor is used to:
  • the receiver is configured to receive a first signal according to a first pilot structure if a resource of a side line synchronization signal of the first system and a resource of a side line synchronization signal of the second system are different; the first signal a transmission signal including a side line synchronization signal, a demodulation reference signal DMRS, and a data signal of the first system generated by the first terminal device in the first system according to the first pilot structure; wherein the side line synchronization
  • the signal includes a side row primary synchronization signal and a side line secondary synchronization signal; each of the subframes adopting the first pilot structure includes two DMRSs, and one of the DMRSs
  • the side row primary synchronization signal is spaced by two orthogonal frequency division multiplexed OFDM symbols, and the other DMRS is spaced apart from the side line secondary synchronization signal by two OFDM symbols.
  • the processor may be a central processing unit (English: Central Processing Unit, CPU for short), or may be other general-purpose processors, digital signal processors (English: Digital Signal Processor) , referred to as: DSP), ASIC (English: Application Specific Integrated Circuit, referred to as: ASIC).
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the foregoing memory may be a read-only memory (English: read-only memory, abbreviation: ROM), a random access memory (English) :random access memory (abbreviation: RAM), flash memory, hard disk or solid state disk.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

Selon des modes de réalisation, la présente invention concerne un procédé d'émission de signaux et un dispositif de terminal. Le procédé consiste à : obtenir des premières informations de paramètre d'un signal de synchronisation de liaison latérale d'un premier système et des secondes informations de paramètre d'un signal de synchronisation de liaison latérale d'un second système ; déterminer si une ressource du signal de synchronisation de liaison latérale du premier système est identique à celle du signal de synchronisation de liaison latérale du second système ; si tel n'est pas le cas, produire un premier signal conformément à une première structure de pilote, chaque sous-trame du premier signal comprenant deux signaux de référence de démodulation (DMRS), un DMRS est espacé d'un signal de synchronisation de liaison latérale primaire par deux symboles de multiplexage par répartition orthogonale de la fréquence (OFDM), et l'autre DMRS est espacé d'un signal de synchronisation de liaison latérale secondaire par deux symboles OFDM ; et émettre le premier signal vers un second dispositif terminal dans le premier système. La réduction du nombre de symboles existants entre les DMRS permet de raccourcir l'intervalle de temps entre les DMRS et de le maintenir dans une plage de temps de cohérence de canal du premier système, réduisant ainsi efficacement le taux d'erreur sur les bits d'une extrémité de réception.
PCT/CN2016/070508 2016-01-08 2016-01-08 Procédé d'émission de signaux et dispositif de terminal WO2017117811A1 (fr)

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