WO2017117811A1 - 信号的传输方法和终端设备 - Google Patents
信号的传输方法和终端设备 Download PDFInfo
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- 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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- synchronization signal
- side line
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- dmrs
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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
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- 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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Abstract
本发明实施例提供一种信号的传输方法和终端设备,该方法包括:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;判断第一系统的侧行同步信号的资源和第二系统的侧行同步信号的资源是否相同;若不同,则根据第一导频结构生成第一信号;其中,第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;将第一信号发送至第一系统中的第二终端设备。通过减少解调参考信号之间间隔的符号个数,缩短解调参考信号时间的时间间隔,保持在第一系统的信道相干时间范围内,有效减小接收端的误码率。
Description
本发明实施例涉及数据传输技术,尤其涉及一种信号的传输方法和终端设备。
目前,设备到设备(Device-to-Device,D2D)是一种端到端直接通信的技术,终端设备之间的通信不再需要基站的中转直接就可以进行通信,基站可以进行资源的配置、调度和协调等,辅助终端设备之间直接进行通信。
近年来汽车网络越来越受到人们的关注,通过车与车通信或者车与路边单元之间的通信从而提高道路交通的安全性、可靠性,提升交通通行效率。在车联网中,为保证车辆安全行驶,车与车之间需要周期性的交互状态信息,车辆通常采用广播的方式向周围的其他车辆发送自身的状态信息,这种通信方式和长期演进(Long Term Evolution,LTE)的D2D系统类似,因此基于D2D系统的车联网技术已经在第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)中立项。图1为LTE D2D系统中物理侧行广播信道(Physical Sidelink Broadcast Channel,PSBCH)发送的同步信号的子帧结构,如图1所示,每个子帧包括14个正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)符号,由左至右第二和第三个符号表示侧行主同步信号(Primary Sidelink Synchronization Signal,PSSS),第四个、第十一个符号表示解调参考信号(DeModulation Reference Signal,DMRS),第十二、第十三个符号表示侧行辅同步信号(Secondary Sidelink Synchronization Signal,SSSS),第十四个符号表示间隙(GAP),并不用来发送数据,其他符号用来传输PSBCH数据。
然而,车联网相对于普通D2D,终端设备是高速移动的,每两个车辆之间的最高相对移动速度可以达到280km/h,而D2D系统PSBCH导频结构中两个导频之间间隔的时间远远超过了车联网系统要求的信道相干时间,使得利用两个导频符号的信道估计进行插值得到的其他符号上的信道估计与真实
信道相差很大,从而导致接收端的误码率提高,数据传输失败。
发明内容
本发明实施例提供一种信号的传输方法和终端设备,以解决D2D系统PSBCH导频结构中两个导频信号的时间间隔远远超过了车联网系统要求的信道相干时间,使得利用两个导频符号的信道估计进行插值得到的其他符号上的信道估计与真实信道相差很大,从而导致接收端的误码率提高,数据传输失败的问题。
本发明第一方面提供一种信号的传输方法,包括:
获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
若不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;
将所述第一信号发送至所述第一系统中的第二终端设备。
结合第一方面,在第一方面的第一种可能的实施方式中,所述方法还包括:
若相同,则根据第二导频结构生成第二信号;所述第二信号包括所述第一系统的侧行同步信号、DMRS和数据信号;
将所述第二信号发送至所述第一系统的第二终端设备;
其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第
十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
结合第一方面或者第一方面的第一种可能的实施方式,在第一方面的第二种可能的实施方式中,所述第一导频结构包括正常CP的导频方案或者扩展CP的导频方案;
其中,所述正常CP的导频方案中每个子帧包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第五个、第七个、第八个、第十个和第十一个符号表示传输的数据信号,第六个和第九个符号表示DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
所述扩展CP的导频方案中每个子帧包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第四个、第六个、第八个和第九个符号表示传输的数据信号,第五个和第七个符号表示DMRS,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
结合前述的任一种实现方式,在第一方面的第三种可能的实施方式中,所述获取第一系统的侧行同步信号的第一参数信息、第二系统的侧行同步信号的第二参数信息,包括:
接收基站广播的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息;
或者,
获取预配置的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。
结合前述的任一实时方式,在第一方面的第四种可能的实施方式中,所述第一系统为车联网通信系统;所述第二系统为设备到设备D2D通信系统。
本发明第二方面提供一种数据信号的传输方法,包括:
获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
若不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
结合第二方面,在第二方面的第一种可能的实施方式中,所述方法还包括:
若相同,则根据第二导频结构接收第二信号;所述第二信号为所述第一系统中的第一终端设备根据所述第二导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号;
其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、
第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
本发明第三方面提供一种终端设备,包括:
获取模块,用于获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
判断模块,用于根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
处理模块,用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;
发送模块,用于将所述第一信号发送至所述第一系统中的第二终端设备。
结合第三方面,在第三方面的第一种可能的实施方式中,所述处理模块还用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源相同,则根据第二导频结构生成第二信号;所述第二信号包括所述第一系统的侧行同步信号、DMRS和数据信号;
所述发送模块还用于将所述第二信号发送至所述第一系统的第二终端设备;
其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
结合前述任一种实现方式,在第三方面的第二种实现方式中,所述第一导频结构包括正常CP的导频方案或者扩展CP的导频方案;
其中,所述正常CP的导频方案中每个子帧包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第五个、第七个、第八个、第十个和第十一个符号表示传输的数据信号,第六个和第九个符号表示DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
所述扩展CP的导频方案中每个子帧包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第四个、第六个、第八个和第九个符号表示传输的数据信号,第五个和第七个符号表示DMRS,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
结合前述任一实现方式,在第三方面的第三种实现方式中,所述获取模
块包括:
接收单元,用于接收基站广播的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息;
或者,
处理单元,用于获取预配置的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。
本发明第四方面提供一种终端设备,包括:
获取模块,用于获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
判断模块,用于根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
接收模块,用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
结合第四方面,在第四方面的第一种可能的实施方式中,所述接收模块还用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源相同,则根据第二导频结构接收第二信号;所述第二信号为所述第一系统中的第一终端设备根据所述第二导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号;
其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第
十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
本发明第五方面提供一种终端设备,包括:用于控制可执行指令执行的处理器、用于存储处理器可执行指令的存储器以及发送器;
所述处理器用于:
获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
若不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;
所述发送器用于将所述第一信号发送至所述第一系统中的第二终端设备。
本发明第六方面提供一种终端设备,包括:用于控制可执行指令执行的处理器、用于存储处理器可执行指令的存储器以及接收器;
所述处理器用于:
获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
所述接收器用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
本发明实施例提供的信号的传输方法和终端设备,通过第一系统的第一参数信息和第二系统的第二参数信息,判断第一系统和第二系统的侧行同步信号的资源是否相同,若相同,则通过增加解调参考信号的时域密度,即减少解调参考信号之间间隔的符号个数,在第一系统和第二系统侧行同步资源不同时,保持导频开销不变,更改解调参考信号的位置,可以克服第一系统中高多普勒扩展的影响,缩短解调参考信号之间的时间间隔,保持在第一系统的信道相干时间范围内,有效减小接收端的误码率。
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1为LTE D2D系统中物理侧行广播信道(Physical Sidelink Broadcast Channel,PSBCH)发送的同步信号的子帧结构;
图2为本发明提供的信号的传输方法的实施例一的流程图;
图3a为第一导频结构中正常循环前缀(Cyclic Prefix,CP)的帧结构示意
图;
图3b为第一导频结构中扩展CP的帧结构示意图;
图4为本发明提供的信号的传输方法的实施例二的流程图;
图5a为第二导频结构中正常CP的第一种帧结构示意图;
图5b为第二导频结构中正常CP的第二种帧结构示意图;
图5c为第二导频结构中正常CP的第三种帧结构示意图;
图5d为第二导频结构中扩展CP的帧结构示意图;
图6为本发明提供的信号的传输方法的实施例三的流程图;
图7为D2D系统和LTE-V系统时分复用示意图;
图8为D2D系统和LTE-V系统共享资源示意图;
图9为本发明提供的终端设备实施例一的结构示意图;
图10为本发明提供的终端设备实施例二的结构示意图;
图11为本发明提供的终端设备实施例三的结构示意图;
图12为本发明提供的终端设备一实例的结构示意图;
图13为本发明提供的终端设备又一实例的结构示意图。
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明提供的信号的传输方法主要是应用在存在两种通信系统的传输机制时,例如:存在LTE D2D系统以及以D2D通信为基础建立的车联网系统(也称为LTE-V系统),优选的应用在车联网中(有无基站参与均可),目前对于LTE-V PSBCH上的导频设计还没有对应的方案,如果沿用LTE D2D系统PSBCH信道导频,存在一定的问题,因此本发明提出了几种新的导频方案,既可以避免由于高载频和高移动速度造成的多普勒扩展,也可以降低该PSBCH上的传输误码率,具体实现方案如下:
图2为本发明提供的信号的传输方法的实施例一的流程图,如图2所示,
本实施例的执行主体为发送端的第一终端设备,例如:手机、平板电脑等智能终端设备,也可以是车辆,该第一终端设备可以与基站进行通信或者可以与其他终端设备进行直接通信,该信号的传输方法具体包括:
S101:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息。
在本实施例中,包括至少以下两种获取参数信息的方式:
第一种方式,接收基站广播的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。
基站具有无线资源管理的功能,可以与第一终端设备进行通信,也可以作为中央控制器协助终端设备之间进行通讯。基站可对控制的终端设备进行传输资源的配置,并将配置的参数信息进行广播通知,该第一参数信息包括该第一系统的侧行同步信号传输的频域信息和时域信息;第二参数信息包括该第二系统的侧行同步信号数据传输的时域信息和频域信息。这里指的是侧行同步信号的一些参数。
第二种方式,获取预配置的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。用户可根据需求手动配置需要的参数信息在该终端设备中。
可选的,还可以根据上述两种方式获取到资源池信息。
S102:根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同。
在本实施例中,根据上述步骤获取的第一次参数信息和第二参数信息,对比第一系统和第二系统的侧行同步信号的频域信息和时域信息是否相同。
例如:对比第一系统和第二系统发送侧行同步信号的载频信息和子帧信息,只有当载频信息和子帧信息都相同时,判断第一系统和第二系统的侧行同步信号资源相同,否则判断资源不同。
S103:若不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、DMRS和数据信号。
其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个
DMRS与侧行辅同步信号间隔两个OFDM符号。
进一步地,在该第一导频结构中,其中一个DMRS位于侧行主同步信号之后,且与最后一个侧行主同步信号间隔两个正交频分复用OFDM符号;另一个位于侧行辅同步信号之前,且与第一个侧行辅同步信号间隔两个OFDM符号。
S104:将所述第一信号发送至所述第一系统中的第二终端设备。
结合上述步骤,下面以D2D系统(相当于第二系统)和LTE-V系统(相当于第一系统)为例,具体说明该方案,第一终端设备通过基站广播或者通过预配置的方式,配置D2D系统和LTE-V的侧行同步信号(sidelink synchronization signal,SLSS)的参数信息。
该第一终端设备根据接收到的基站广播的侧行同步信号参数信息,或者根据预配置的侧行同步信号参数信息,判断D2D系统的侧行同步信号资源是否和LTE-V系统的侧行同步信号资源相同。
如果D2D系统的侧行同步信号资源和LTE-V系统的同步信号资源不同,即D2D系统和LTE-V系统的同步信号具有不同的传输资源,则可以采用下图3a或3b中的导频结构进行同步信号和PSBCH的发送。图3a为第一导频结构中正常CP的帧结构示意图;图3b为第一导频结构中扩展CP的帧结构示意图。即该第一导频结构包括正常CP的导频方案或者扩展CP的导频方案。
如图3a所示,在正常CP的导频方案中每个子帧包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号(图中的PSSS),第一个、第四个、第五个、第七个、第八个、第十个和第十一个符号表示传输的数据信号,第六个和第九个符号表示DMRS,第十二个和第十三个符号表示侧行辐同步信号(图中的SSSS),第十四个符号作为间隙;
如图3b所示,扩展CP的导频方案中每个子帧包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号(图中的PSSS),第三个、第四个、第六个、第八个和第九个符号表示传输的数据信号,第五个和第七个符号表示DMRS,第十个和第十一个符号表示侧行辐同步信号(图中的SSSS),第十二个符号作为间隙。
图中示出了不同时频资源上要发送的不同的信号,在第一终端设备判断出D2D系统和LTE-V系统使用的同步资源不同时,针对该LTE-V系统可以
采用上述图3a或图3b示出的帧结构生成传输信号,即第一信号,然后将该信号发送给第二终端设备,对于接收端终端设备来说,与该发送端的终端设备的实现方式类似,预先获取每个系统的参数信息,结合参数信息判断第一系统和第二系统是否使用相同的同步资源,若不同,则根据上述的第一导频结构对该第一信号进行接收。
本实施例提供的信号的传输方法,提供一种根据参数信息判断同步信号资源是否相同的方式,并提供一种新的导频方案,通过增加解调参考信号的时域密度,即减少解调参考信号之间间隔的符号个数,在资源不同时,保持导频开销不变,更改解调参考信号的位置,可以克服第一系统中高多普勒扩展的影响,缩短解调参考信号的时间间隔,保持在第一系统的信道相干时间范围内,有效减小接收端的误码率。
图4为本发明提供的信号的传输方法的实施例二的流程图,如图4所示,本实施例的执行主体为发送端的第一终端设备,该信号的传输方法具体实现步骤包括:
S201:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息。
S202:根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同。
前述两个步骤的具体实现与实施例一完全相同,本方案与实施例一的技术方案是并列的两个分支,在判断出第一系统和第二系统使用不同的同步信号的资源时,执行前述的S103和S104的步骤,判断出第一系统和第二系统使用相同的同步信号的资源时,执行S203和S204的步骤。
S203:若相同,则根据第二导频结构生成第二信号;所述第二信号包括所述第一系统的侧行同步信号、DMRS和数据信号。
在本实施例中,在实施例一的基础上,继续以D2D系统(相当于第二系统)和LTE-V系统(相当于第一系统)为例,当第一终端设备判断出LTE-V系统和D2D系统的同步信号的资源相同时,则采用第二导频结构生成第二信号。这里同步信号的资源相同指的是两个系统均使用LTE-V系统的专有载波,例如频率为5.9GHz、6GHz等配置为LTE-V系统的专有载波,并且两个系统传输同步信号的时域资源和频域资源相同。
采用所述第二导频结构的生成的第二信号的每个子帧的结构为以下四种结构中的任一种:
图5a为第二导频结构中正常CP的第一种帧结构示意图,如图5a所示,该第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号(即图中的PSSS),第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号(即图中的SSSS),第十四个符号作为间隙。
图5b为第二导频结构中正常CP的第二种帧结构示意图,如图5b所示,第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号(即图中的PSSS),第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号(即图中的SSSS),第十四个符号作为间隙。
图5c为第二导频结构中正常CP的第三种帧结构示意图,如图5c所示,第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号(即图中的PSSS),第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号(即图中的SSSS),第十四个符号作为间隙。
图5d为第二导频结构中扩展CP的帧结构示意图,如图5d所示,该种帧结构为第二导频结构中的第四种帧结构,该第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号(即图中的PSSS),第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号(即图中的SSSS),第十二个符号作为间隙。
S204:将所述第二信号发送至所述第一系统的第二终端设备。
即第一终端设备在判断出第一系统和第二系统的使用相同的同步信号的资源之后,可以根据第二导频结构中的任一种帧结构生成传输信号,即上述第二信号,并进行发送。即采用图5a-5d任一种帧结构进行同步信号和PSBCH
的发送,针对接收端的终端设备,其实现方式与发送端类似,预先获取第一系统和第二系统的侧行同步信号的参数信息,判断第一系统和第二系统的同步信号是否使用相同的资源,若不同则采用第一导频结构进行接收,若相同则采用第二导频结构进行接收。
具体的,对于发送端的第一终端设备具体选择上述几种帧结构中的哪一种可以进行预先进行配置或者由协议规定,还可以是由基站广播通知的消息进行确定,对此本申请不做限制。
本实施例提供的信号的传输方法,通过不同系统的资源的参数信息,设计了新的PSBCH信道的导频方案,既可以克服LTE-V系统等高速系统中多普勒扩展的影响,降低系统信号传输的误码率,同时也可以降低导频开销。
图6为本发明提供的信号的传输方法的实施例三的流程图,如图6所示,本实施例的执行主体为接收端的第二终端设备,该第二终端设备可以是手机、平板电脑、车辆等设备,该信号的传输方法的具体实现步骤包括:
S301:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息。
S302:根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同。
S303:若不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号。
在本实施例中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
S304:若相同,则根据第二导频结构接收第二信号;所述第二信号为所述第一系统中的第一终端设备根据所述第二导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号。
在本步骤中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行
主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
在本实施例中,针对接收端的终端设备,与发送端的终端设备类似,也是预先获取第一系统和第二系统的参数信息,根据参数信息判断第一系统和第二系统的同步信号使用的资源是否相同,若不同则采用第一导频结构进行信号的接收,若相同则采用第二导频结构进行信号的接收,具体的导频方案参考前述实施例一和实施例二中的描述。与发送端的终端设备类似,具体选择上述几种中的哪一种帧结构可以进行预先配置或者协议规定,也可以通过基站发送的通知消息的指示进行确定,对此本申请不做限制。
结合前述的实施例一至三的描述,下面提供一种具体的实现方式:
如在现有LTE系统工作载波的基础上,为LTE-V系统分配专用载波进行车联网的传输,如LTE系统采用2.6GHz的载波,LTE-V系统采用5.9GHz的载波,在5.9GHz载波上只有车联网业务,而在2.6G载波上既有LTE的正常上下行业务,也有D2D系统,此时D2D系统和LTE-V系统工作在不同的载波。因此LTE-V系统的PSBCH子帧的导频可以采用前述的第一导频结构中的子帧结构。
另外,图7为D2D系统和LTE-V系统时分复用示意图,如果基站配置
D2D系统和LTE-V系统工作在一个载波上,并且两者的传输资源是时分的,如图7所示,此时LTE-V系统的PSBCH子帧可采用第一导频结构的导频结构。
图8为D2D系统和LTE-V系统共享资源示意图,如果基站配置D2D系统和LTE-V系统工作在一个载波上,并且两者的同步信号传输资源在时间上是重叠的,如图8所示,此时LTE-V系统的PSBCH子帧采用图5a至图5d所示的导频结构,具体采用哪一种导频结构可以由基站配置,协议规定或者是预配置。
在图7和图8中,横轴t表示时间,纵轴f表示频率,D表示D2D系统,V表示LTE-V系统。
本发明提供的信号的传输方法,设计了新的PSBCH信道导频结构。相对于Rel-12PSBCH导频结构,该方案在D2D和LTE-V同步资源相同的情况下增加了导频密度以克服多普勒扩展的影响。在D2D和LTE-V同步资源不同的情况下,保持导频开销不变,更改了导频位置,缩短了导频信号之间的时间间隔,降低接收端的误码率,提高数据传输效率。
图9为本发明提供的终端设备实施例一的结构示意图,如图9所示,该终端设备10包括:
获取模块11,用于获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
判断模块12,用于根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
处理模块13,用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;
发送模块14,用于将所述第一信号发送至所述第一系统中的第二终端设
备。
可选的,所述处理模块13还用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源相同,则根据第二导频结构生成第二信号;所述第二信号包括所述第一系统的侧行同步信号、DMRS和数据信号;
所述发送模块14还用于将所述第二信号发送至所述第一系统的第二终端设备;
其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
具体的,所述第一导频结构包括正常CP的导频方案或者扩展CP的导频方案;
其中,所述正常CP的导频方案中每个子帧包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第五个、第七个、第八个、第十个和第十一个符号表示传输的数据信号,第六个和第九个符号表示DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号
作为间隙;
所述扩展CP的导频方案中每个子帧包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第四个、第六个、第八个和第九个符号表示传输的数据信号,第五个和第七个符号表示DMRS,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
图10为本发明提供的终端设备实施例二的结构示意图,如图10所示,所述获取模块11包括:
接收单元111,用于接收基站广播的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息;
或者,处理单元112,用于获取预配置的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。
本实施例提供的终端设备用于执行图1至图5d所示的方法实施例的技术方案,其实现原理和技术效果类似,在此不再赘述。
图11为本发明提供的终端设备实施例三的结构示意图,如图11所示,终端设备20包括:
获取模块21,用于获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
判断模块22,用于根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
接收模块23,用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
可选的,所述接收模块23还用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源相同,则根据第二导频结构接收第二
信号;所述第二信号为所述第一系统中的第一终端设备根据所述第二导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号;
其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:
第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;
第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
本实施例提供的终端设备用于执行图6所示的方法实施例的技术方案,其实现原理和技术效果类似,在此不再赘述。
所述作为分离部件说明的模块可以是或者也可以不是物理上分开的,作为模块显示的部件可以是或者也可以不是物理模块,即可以位于一个地方,或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能模块可以集成在一个处理模块中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用硬件加软件功能模块的形式实现。
图12为本发明提供的终端设备一实例的结构示意图,如图12所示,该终端设备可以被具体实现为:用于控制可执行指令执行的处理器、用于存储处理器可执行指令的存储器以及发送器;
所述处理器用于:
获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
若不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;
所述发送器用于将所述第一信号发送至所述第一系统中的第二终端设备。
图13为本发明提供的终端设备又一实例的结构示意图,如图13所示,该终端设备可以被具体实现为:用于控制可执行指令执行的处理器、用于存储处理器可执行指令的存储器以及接收器;
所述处理器用于:
获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;
根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;
所述接收器用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与
侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
在上述终端设备的实施例中,应理解,该处理器可以是中央处理单元(英文:Central Processing Unit,简称:CPU),还可以是其他通用处理器、数字信号处理器(英文:Digital Signal Processor,简称:DSP)、专用集成电路(英文:Application Specific Integrated Circuit,简称:ASIC)等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等,而前述的存储器可以是只读存储器(英文:read-only memory,缩写:ROM)、随机存取存储器(英文:random access memory,简称:RAM)、快闪存储器、硬盘或者固态硬盘。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims (15)
- 一种信号的传输方法,其特征在于,包括:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;若不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;将所述第一信号发送至所述第一系统中的第二终端设备。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:若相同,则根据第二导频结构生成第二信号;所述第二信号包括所述第一系统的侧行同步信号、DMRS和数据信号;将所述第二信号发送至所述第一系统的第二终端设备;其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十 二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
- 根据权利要求1或2所述的方法,其特征在于,所述第一导频结构包括正常循环前缀CP的导频方案或者扩展CP的导频方案;其中,所述正常CP的导频方案中每个子帧包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第五个、第七个、第八个、第十个和第十一个符号表示传输的数据信号,第六个和第九个符号表示DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;所述扩展CP的导频方案中每个子帧包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第四个、第六个、第八个和第九个符号表示传输的数据信号,第五个和第七个符号表示DMRS,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
- 根据权利要求1至3任一项所述的方法,其特征在于,所述获取第一系统的侧行同步信号的第一参数信息、第二系统的侧行同步信号的第二参数信息,包括:接收基站广播的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息;或者,获取预配置的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。
- 根据权利要求1至4任一项所述的方法,其特征在于,所述第一系统为车联网通信系统;所述第二系统为设备到设备D2D通信系统。
- 一种数据信号的传输方法,其特征在于,包括:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行 同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;若不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
- 根据权利要求6所述的方法,其特征在于,所述方法还包括:若相同,则根据第二导频结构接收第二信号;所述第二信号为所述第一系统中的第一终端设备根据所述第二导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号;其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
- 一种终端设备,其特征在于,包括:获取模块,用于获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;判断模块,用于根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;处理模块,用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;发送模块,用于将所述第一信号发送至所述第一系统中的第二终端设备。
- 根据权利要求8所述的终端设备,其特征在于,所述处理模块还用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源相同,则根据第二导频结构生成第二信号;所述第二信号包括所述第一系统的侧行同步信号、DMRS和数据信号;所述发送模块还用于将所述第二信号发送至所述第一系统的第二终端设备;其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
- 根据权利要求8或9所述的终端设备,其特征在于,所述第一导频结构包括正常CP的导频方案或者扩展CP的导频方案;其中,所述正常CP的导频方案中每个子帧包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第五个、第七个、第八个、第十个和第十一个符号表示传输的数据信号,第六个和第九个符号表示DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;所述扩展CP的导频方案中每个子帧包括十二个OFDM符号,第一个和第二个符号表示侧行主同步信号,第三个、第四个、第六个、第八个和第九个符号表示传输的数据信号,第五个和第七个符号表示DMRS,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
- 根据权利要求8至10任一项所述的终端设备,其特征在于,所述获取模块包括:接收单元,用于接收基站广播的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息;或者,处理单元,用于获取预配置的所述第一系统的侧行同步信号的第一参数信息、所述第二系统的侧行同步信号的第二参数信息。
- 一种终端设备,其特征在于,包括:获取模块,用于获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;判断模块,用于根据所述第一参数信息和所述第二参数信息,判断所述 第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;接收模块,用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
- 根据权利要求12所述的终端设备,其特征在于,所述接收模块还用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源相同,则根据第二导频结构接收第二信号;所述第二信号为所述第一系统中的第一终端设备根据所述第二导频结构生成的包括所述第一系统的侧行同步信号、DMRS和数据信号的传输信号;其中,采用所述第二导频结构的所述第二信号的每个子帧的结构为以下四种结构中的任一种:第一种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第六个、第九个和第十一个符号表示DMRS,第一个、第五个、第七个、第八个和第十个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第二种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第四个、第七个和第十个符号表示DMRS,第一个、第五个、第六个、第八个、第九个和第十一个符号表示传输的数据信号,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第三种子帧结构包括十四个OFDM符号,第二个和第三个符号表示侧行主同步信号,第一个、第四个、第六个、第七个、第九个和第十个符号表示传输的数据信号,第五个、第八个和第十一个符号表示传输的DMRS,第十二个和第十三个符号表示侧行辐同步信号,第十四个符号作为间隙;第四种子帧结构包括十二个OFDM符号,第一个和第二个符号表示侧行 主同步信号,第三个、第六个和第九个符号表示DMRS,第四个、第五个、第七个和第八个符号表示传输的数据信号,第十个和第十一个符号表示侧行辐同步信号,第十二个符号作为间隙。
- 一种终端设备,其特征在于,包括:用于控制可执行指令执行的处理器、用于存储处理器可执行指令的存储器以及发送器;所述处理器用于:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;若不同,则根据第一导频结构生成第一信号;所述第一信号包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号;所述发送器用于将所述第一信号发送至所述第一系统中的第二终端设备。
- 一种终端设备,其特征在于,包括:用于控制可执行指令执行的处理器、用于存储处理器可执行指令的存储器以及接收器;所述处理器用于:获取第一系统的侧行同步信号的第一参数信息和第二系统的侧行同步信号的第二参数信息;根据所述第一参数信息和所述第二参数信息,判断所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源是否相同;所述接收器用于若所述第一系统的侧行同步信号的资源和所述第二系统的侧行同步信号的资源不同,则根据第一导频结构接收第一信号;所述第一信号为第一系统中第一终端设备根据所述第一导频结构生成的包括所述第一系统的侧行同步信号、解调参考信号DMRS和数据信号的传输信号;其中,所述侧行同步信号包括侧行主同步信号和侧行辅同步信号;采用所述第一导 频结构的所述第一信号的每个子帧中包括两个DMRS,且其中一个DMRS与侧行主同步信号间隔两个正交频分复用OFDM符号,另一个DMRS与侧行辅同步信号间隔两个OFDM符号。
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