CN110266628A - A kind of method and apparatus of vehicle multimedia business Delamination Transmission on the move - Google Patents
A kind of method and apparatus of vehicle multimedia business Delamination Transmission on the move Download PDFInfo
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- CN110266628A CN110266628A CN201910527876.4A CN201910527876A CN110266628A CN 110266628 A CN110266628 A CN 110266628A CN 201910527876 A CN201910527876 A CN 201910527876A CN 110266628 A CN110266628 A CN 110266628A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method of vehicle multimedia business Delamination Transmission on the move and corresponding devices, device includes emitter and relay reception device, determine business to be treated, different modulation layerings is distributed according to business, and the quantity of subcarrier and the length of cyclic prefix are set；The respective power gain of multiple subcarriers is set, obtain normalized average power gain, to obtain average signal-to-noise ratio and instantaneous signal-to-noise ratio, the bit error rate and optimum transmission power of independent optimal modulation layering are selected for every subcarriers, adaptively selected order of modulation, it is modulated transmission, meets requirement of the vehicle different business to stable channels mobile communication.
Description
Technical field
This application involves mobile communication technology field more particularly to a kind of vehicle multimedia business Delamination Transmissions on the move
Method and apparatus.
Background technique
It can be related to a variety of different business in the Vehicular system of mobile communication, the importance between various businesses is different, loses
Packet rate requires also different and vehicle that can exist in mobile environment, and transmittability is insufficient, there are intersymbol signal interferences, total anti-
Present the problem that time delay may be big.Specific transmission method is needed, the mode for needing to modulate determines according to actual conditions, especially
In quick time-varying channel, Doppler effect, subscriber channel feature difference, multi-service differentiation scene in.How to be directed to
How a variety of different business are multiplexing into very important project by the modulation of different business.Existing transmission method is difficult to full
The requirement moved enough.
Summary of the invention
The purpose of the present invention is to provide a kind of method of vehicle multimedia business Delamination Transmission on the move and accordingly
Device, device includes emitter and relay reception device, determines business to be treated, is distributed according to business different
Modulation layering, is arranged the quantity of subcarrier and the length of cyclic prefix；The respective power gain of multiple subcarriers is set, is returned
One average power gain changed selects independent optimal to obtain average signal-to-noise ratio and instantaneous signal-to-noise ratio for every subcarriers
The bit error rate and optimum transmission power of layering are modulated, adaptively selected order of modulation is modulated transmission, meets vehicle difference
Requirement of the business to stable channels mobile communication.
In a first aspect, the application provides a kind of method of vehicle multimedia business Delamination Transmission on the move, the method
Include:
Base station transmitting terminal determines the type and quantity for needing processing business；
According to the importance of each business, corresponding modulation layering is determined, the modulation layering includes 4-QAM and 16-
QAM；
The CSI value of wireless channel where estimating carrier frequency；
According to the CSI value of estimation, the quantity of subcarrier and the length of cyclic prefix are set, the length of the cyclic prefix is big
It is extended in the maximum delay of wireless channel；
The respective power gain of multiple subcarriers is set, and the power gain is related to the direction of multiple antennas and angle；
Multicarrier average power gain according to the power gain of multiple subcarriers, after obtaining normalized；
According to the transmission power that multicarrier average power gain and transmitting terminal distribution are given, average signal-to-noise ratio and instantaneous is obtained
Signal-to-noise ratio；
Transmitting terminal estimates channel status, generates imperfect channel state information on frequency domain, is believed according to imperfect channel state
Breath and instantaneous signal-to-noise ratio are adaptively adjusted, and every subcarriers optimum transmission power independent and different modulating point are obtained
The bit error rate of layer；
To mobile relay receiving end pilot signal transmitted；
According to the CSI value, bit error rate, multicarrier quantity and modulation layering, a kind of adaptively selected order of modulation；
According to obtained modulation layering and order of modulation, bit data to be transmitted is modulated to information symbol, is passed through
Ofdm system is sent to mobile relay receiving end；
Judge whether mobile relay receiving end is properly received, if it is, continuing to send；If it is not, then retransmitted,
And judge whether number of retransmissions reaches maximum retransmission.
With reference to first aspect, in a first possible implementation of that first aspect, described to obtain average signal-to-noise ratio and wink
When signal-to-noise ratio after, further includes:
According to the value of each possible instantaneous signal-to-noise ratio, an optimal modulating mode is selected from modulating mode set M；
It include: that M0 indicates that current channel status is very poor and can not support minimum speed limit in the modulating mode set M
Reliable transmission, M1 indicate the poor reliable transmission that can only support minimum speed limit of current channel status, and M2 indicates current letter
Road state can preferably support the reliable transmission of higher rate.
With reference to first aspect, in a second possible implementation of that first aspect, adaptively selected a kind of modulation
Order further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
With reference to first aspect, in first aspect in the third possible implementation, according to the importance of transmission services, really
Fixed corresponding packet loss requirement；
The mapping table between maximum retransmission and packet loss value is established, according to determining packet loss requirement, inquiry
Obtain the corresponding maximum retransmission of transmission services.
Second aspect, the application provide a kind of method of vehicle multimedia business Delamination Transmission on the move, the method
Include:
Mobile relay receiving end receives the information symbol that base station transmitting terminal is sent by multiple antennas, carries out fast Fourier change
It changes, therefrom extracts pilot signal；
The timing of the information symbol and local clock is synchronized according to pilot signal, and is obtained from pilot signal non-ideal
Channel state information；
The average signal-to-noise ratio and instantaneous signal-to-noise ratio of base station transmitting terminal are calculated by imperfect channel state information；
CSI estimation is carried out to transmission channel after receiving end on the move, is increased according to the value of CSI estimation, the amplitude of subcarrier
Beneficial and described instantaneous signal-to-noise ratio adjusts the corresponding gain parameter of every subcarriers, every subcarriers have it is independent most
The bit error rate of excellent transmission power and different modulating layering；
According to the multiple services data packet of last Successful transmissions, obtains and transmit multiple services importance, according to each industry
The importance of business determines corresponding modulation layering, and the modulation layering includes 4-QAM and 16-QAM；
According to the value of CSI estimation, bit error rate, multicarrier quantity and modulation layering, a kind of adaptively selected modulation
Order；
According to obtained modulation layering, order of modulation and the corresponding gain parameter of every subcarriers, the information received
Symbol demodulation is bit data, is reduced into data packet by encapsulating again, passes to the user terminal of receiving side；
Judge whether the data packet received is complete, if it is, showing transmission success；If it is not, then showing to transmit
Failure sends instruction for base station transmitting terminal and retransmits data packet, and judges whether number of retransmissions reaches maximum retransmission.
It is described to be believed by imperfect channel state in second aspect in the first possible implementation in conjunction with second aspect
Breath calculates after the average signal-to-noise ratio and instantaneous signal-to-noise ratio of base station transmitting terminal, further includes:
According to the value of each possible instantaneous signal-to-noise ratio, an optimal demodulation modes are selected from demodulation modes set M；
It include: that M0 indicates that current channel status is very poor and can not support minimum speed limit in the demodulation modes set M
Reliable transmission, M1 indicate the poor reliable transmission that can only support minimum speed limit of current channel status, and M2 indicates current letter
Road state can preferably support the reliable transmission of higher rate.
In conjunction with second aspect, in second of second aspect possible implementation, adaptively selected a kind of modulation
Order further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
In conjunction with second aspect, in second aspect in the third possible implementation, according to the importance of transmission services, really
Fixed corresponding packet loss requirement；
The mapping table between maximum retransmission and packet loss value is established, according to determining packet loss requirement, inquiry
Obtain the corresponding maximum retransmission of transmission services.
The third aspect, the application provide a kind of emitter applied under mobile context, including processor and for depositing
The memory of the enough computer programs run on a processor of energy storage, wherein the processor is for running the computer journey
When sequence, the step of perform claim requires 1-4 described in any item transmission methods.
Fourth aspect, the application provide a kind of relay reception device applied under mobile context, including processor and use
In the memory for the computer program that storage can be run on a processor, wherein the processor is for running the calculating
When machine program, the step of perform claim requires 5-8 described in any item transmission methods.
The present invention provide a kind of vehicle multimedia business Delamination Transmission on the move method and corresponding device, dress
It sets including emitter and relay reception device, determines business to be treated, different modulation layerings is distributed according to business,
The quantity of subcarrier and the length of cyclic prefix are set；The respective power gain of multiple subcarriers is set, is obtained normalized flat
Equal power gain selects independent optimal modulation layering to obtain average signal-to-noise ratio and instantaneous signal-to-noise ratio for every subcarriers
Bit error rate and optimum transmission power, adaptively selected order of modulation is modulated transmission, meets vehicle different business to steady
Determine the requirement of channel mobile communication.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, for those of ordinary skills, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of one embodiment of the method for vehicle multimedia business Delamination Transmission on the move of the present invention；
Fig. 2 is the flow chart of one embodiment of the method for vehicle multimedia business Delamination Transmission on the move of the present invention.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Fig. 1 is the flow chart of the method for vehicle multimedia business Delamination Transmission on the move provided by the present application, the side
Method includes:
Base station transmitting terminal determines the type and quantity for needing processing business；
According to the importance of each business, corresponding modulation layering is determined, the modulation layering includes 4-QAM and 16-
QAM；
The CSI value of wireless channel where estimating carrier frequency；
According to the CSI value of estimation, the quantity of subcarrier and the length of cyclic prefix are set, the length of the cyclic prefix is big
It is extended in the maximum delay of wireless channel；
The respective power gain of multiple subcarriers is set, and the power gain is related to the direction of multiple antennas and angle；
Multicarrier average power gain according to the power gain of multiple subcarriers, after obtaining normalized；
According to the transmission power that multicarrier average power gain and transmitting terminal distribution are given, average signal-to-noise ratio and instantaneous is obtained
Signal-to-noise ratio；
Transmitting terminal estimates channel status, generates imperfect channel state information on frequency domain, is believed according to imperfect channel state
Breath and instantaneous signal-to-noise ratio are adaptively adjusted, and every subcarriers optimum transmission power independent and different modulating point are obtained
The bit error rate of layer；
To mobile relay receiving end pilot signal transmitted；
According to the CSI value, bit error rate, multicarrier quantity and modulation layering, a kind of adaptively selected order of modulation；
According to obtained modulation layering and order of modulation, bit data to be transmitted is modulated to information symbol, is passed through
Ofdm system is sent to mobile relay receiving end；
Judge whether mobile relay receiving end is properly received, if it is, continuing to send；If it is not, then retransmitted,
And judge whether number of retransmissions reaches maximum retransmission.
In some preferred embodiments, it is described obtain average signal-to-noise ratio and instantaneous signal-to-noise ratio after, further includes:
According to the value of each possible instantaneous signal-to-noise ratio, an optimal modulating mode is selected from modulating mode set M；
It include: that M0 indicates that current channel status is very poor and can not support minimum speed limit in the modulating mode set M
Reliable transmission, M1 indicate the poor reliable transmission that can only support minimum speed limit of current channel status, and M2 indicates current letter
Road state can preferably support the reliable transmission of higher rate.
In some preferred embodiments, adaptively selected a kind of order of modulation further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
In some preferred embodiments, according to the importance of transmission services, corresponding packet loss requirement is determined；
The mapping table between maximum retransmission and packet loss value is established, according to determining packet loss requirement, inquiry
Obtain the corresponding maximum retransmission of transmission services.
Fig. 2 is the flow chart of the method for vehicle multimedia business Delamination Transmission on the move provided by the present application, the side
Method includes:
Mobile relay receiving end receives the information symbol that base station transmitting terminal is sent by multiple antennas, carries out fast Fourier change
It changes, therefrom extracts pilot signal；
The timing of the information symbol and local clock is synchronized according to pilot signal, and is obtained from pilot signal non-ideal
Channel state information；
The average signal-to-noise ratio and instantaneous signal-to-noise ratio of base station transmitting terminal are calculated by imperfect channel state information；
CSI estimation is carried out to transmission channel after receiving end on the move, is increased according to the value of CSI estimation, the amplitude of subcarrier
Beneficial and described instantaneous signal-to-noise ratio adjusts the corresponding gain parameter of every subcarriers, every subcarriers have it is independent most
The bit error rate of excellent transmission power and different modulating layering；The gain parameter, with the quantity of subcarrier and the length of cyclic prefix
Degree is related；
According to the multiple services data packet of last Successful transmissions, obtains and transmit multiple services importance, according to each industry
The importance of business determines corresponding modulation layering, and the modulation layering includes 4-QAM and 16-QAM；
According to the value of CSI estimation, bit error rate, multicarrier quantity and modulation layering, a kind of adaptively selected modulation
Order；
According to obtained modulation layering, order of modulation and the corresponding gain parameter of every subcarriers, the information received
Symbol demodulation is bit data, is reduced into data packet by encapsulating again, passes to the user terminal of receiving side；
Judge whether the data packet received is complete, if it is, showing transmission success；If it is not, then showing to transmit
Failure sends instruction for base station transmitting terminal and retransmits data packet, and judges whether number of retransmissions reaches maximum retransmission.
In some preferred embodiments, the average signal-to-noise ratio that base station transmitting terminal is calculated by imperfect channel state information
After instantaneous signal-to-noise ratio, further includes:
According to the value of each possible instantaneous signal-to-noise ratio, an optimal demodulation modes are selected from demodulation modes set M；
It include: that M0 indicates that current channel status is very poor and can not support minimum speed limit in the demodulation modes set M
Reliable transmission, M1 indicate the poor reliable transmission that can only support minimum speed limit of current channel status, and M2 indicates current letter
Road state can preferably support the reliable transmission of higher rate.
In some preferred embodiments, adaptively selected a kind of order of modulation further include:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
In some preferred embodiments, according to the importance of transmission services, corresponding packet loss requirement is determined；
The mapping table between maximum retransmission and packet loss value is established, according to determining packet loss requirement, inquiry
Obtain the corresponding maximum retransmission of transmission services.
The application provides a kind of emitter applied under mobile context, including processor and can locate for storing
The memory of the computer program run on reason device, wherein the processor is for executing figure when running the computer program
The step of transmission method described in all or part in 1 embodiment.
The application provides a kind of relay reception device applied under mobile context, including processor and can for storing
The memory of the computer program run on a processor, wherein the processor is for holding when running the computer program
The step of transmission method described in all or part in row Fig. 2 embodiment.
In the specific implementation, the present invention also provides a kind of computer storage mediums, wherein the computer storage medium can deposit
Program is contained, which may include step some or all of in each embodiment of the present invention when executing.The storage medium
It can be magnetic disk, CD, read-only memory (referred to as: ROM) or random access memory (referred to as: RAM) etc..
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on this understanding, the technical solution in the embodiment of the present invention substantially or
The part that contributes to existing technology can be embodied in the form of software products, which can store
In storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions use is so that a computer equipment (can be
Personal computer, server or network equipment etc.) it executes described in certain parts of each embodiment of the present invention or embodiment
Method.
The same or similar parts between the embodiments can be referred to each other for this specification.For embodiment,
Since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to the explanation in embodiment of the method
?.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (10)
1. a kind of method of vehicle multimedia business Delamination Transmission on the move characterized by comprising
Base station transmitting terminal determines the type and quantity for needing processing business；
According to the importance of each business, corresponding modulation layering is determined, the modulation layering includes 4-QAM and 16-QAM；
The CSI value of wireless channel where estimating carrier frequency；
According to the CSI value of estimation, the quantity of subcarrier and the length of cyclic prefix are set, the length of the cyclic prefix is greater than nothing
The maximum delay of line channel extends；
The respective power gain of multiple subcarriers is set, and the power gain is related to the direction of multiple antennas and angle；
Multicarrier average power gain according to the power gain of multiple subcarriers, after obtaining normalized；
According to the transmission power that multicarrier average power gain and transmitting terminal distribution are given, average signal-to-noise ratio and instantaneous noise are obtained
Than；
Transmitting terminal estimates channel status, generates imperfect channel state information on frequency domain, according to imperfect channel state information and
Instantaneous signal-to-noise ratio is adaptively adjusted, obtain every subcarriers optimum transmission power independent and different modulating layering
Bit error rate；
To mobile relay receiving end pilot signal transmitted；
According to the CSI value, bit error rate, multicarrier quantity and modulation layering, a kind of adaptively selected order of modulation；
According to obtained modulation layering and order of modulation, bit data to be transmitted is modulated to information symbol, passes through OFDM system
System is sent to mobile relay receiving end；
Judge whether mobile relay receiving end is properly received, if it is, continuing to send；If it is not, then being retransmitted, and sentence
Whether disconnected number of retransmissions reaches maximum retransmission.
2. the method according to claim 1, wherein it is described obtain average signal-to-noise ratio and instantaneous signal-to-noise ratio after,
Further include:
According to the value of each possible instantaneous signal-to-noise ratio, an optimal modulating mode is selected from modulating mode set M；
It include: that M0 indicates that current channel status is very poor and can not support the reliable of minimum speed limit in the modulating mode set M
Transmission, M1 indicate the poor reliable transmission that can only support minimum speed limit of current channel status, and M2 indicates current channel shape
State can preferably support the reliable transmission of higher rate.
3. method according to claim 1 to 2, which is characterized in that the adaptively selected a kind of order of modulation is also wrapped
It includes:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
4. method according to claim 1 to 3, which is characterized in that according to the importance of transmission services, determine corresponding
Packet loss requirement；
The mapping table between maximum retransmission and packet loss value is established, according to determining packet loss requirement, inquiry is obtained
The corresponding maximum retransmission of transmission services.
5. a kind of method of vehicle multimedia business Delamination Transmission on the move characterized by comprising
Mobile relay receiving end receives the information symbol that base station transmitting terminal is sent by multiple antennas, carries out Fast Fourier Transform (FFT),
Therefrom extract pilot signal；
The timing of the information symbol and local clock is synchronized according to pilot signal, and non-ideal communication channel is obtained from pilot signal
Status information；
The average signal-to-noise ratio and instantaneous signal-to-noise ratio of base station transmitting terminal are calculated by imperfect channel state information；
On the move after receiving end to transmission channel carry out CSI estimation, according to CSI estimation value, subcarrier amplitude gain and
The instantaneous signal-to-noise ratio adjusts the corresponding gain parameter of every subcarriers, and every subcarriers have optimal hair independent
Penetrate the bit error rate of power and different modulating layering；
According to the multiple services data packet of last Successful transmissions, obtains and transmit multiple services importance, according to each business
Importance determines corresponding modulation layering, and the modulation layering includes 4-QAM and 16-QAM；
According to the value of CSI estimation, bit error rate, multicarrier quantity and modulation layering, a kind of adaptively selected order of modulation；
According to obtained modulation layering, order of modulation and the corresponding gain parameter of every subcarriers, the information symbol received
It is demodulated into bit data, is reduced into data packet by encapsulating again, passes to the user terminal of receiving side；
Judge whether the data packet received is complete, if it is, showing transmission success；If it is not, then show transmission failure,
It sends instruction and retransmits data packet for base station transmitting terminal, and judge whether number of retransmissions reaches maximum retransmission.
6. according to the method described in claim 5, it is characterized in that, described calculate that base station is sent by imperfect channel state information
After the average signal-to-noise ratio and instantaneous signal-to-noise ratio at end, further includes:
According to the value of each possible instantaneous signal-to-noise ratio, an optimal demodulation modes are selected from demodulation modes set M；
It include: that M0 indicates that current channel status is very poor and can not support the reliable of minimum speed limit in the demodulation modes set M
Transmission, M1 indicate the poor reliable transmission that can only support minimum speed limit of current channel status, and M2 indicates current channel shape
State can preferably support the reliable transmission of higher rate.
7. according to any method of claim 5-6, which is characterized in that the adaptively selected a kind of order of modulation is also wrapped
It includes:
According to the size of Doppler frequency shift, order of modulation is adjusted, the order of modulation is divided into five grades.
8. according to any method of claim 5-7, which is characterized in that according to the importance of transmission services, determine corresponding
Packet loss requirement；
The mapping table between maximum retransmission and packet loss value is established, according to determining packet loss requirement, inquiry is obtained
The corresponding maximum retransmission of transmission services.
9. a kind of emitter applied under mobile context, including processor and for storing and can run on a processor
The memory of computer program, wherein the processor is for when running the computer program, perform claim to require 1-4 to appoint
The step of transmission method described in one.
10. a kind of relay reception device applied under mobile context, including processor and can be on a processor for storing
The memory of the computer program of operation, wherein the processor is for when running the computer program, perform claim to be required
The step of 5-8 described in any item transmission methods.
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| CN201910527876.4A CN110266628A (en) | 2019-06-18 | 2019-06-18 | A kind of method and apparatus of vehicle multimedia business Delamination Transmission on the move |
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| CN201910527876.4A CN110266628A (en) | 2019-06-18 | 2019-06-18 | A kind of method and apparatus of vehicle multimedia business Delamination Transmission on the move |
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| CN102938748A (en) * | 2012-10-23 | 2013-02-20 | 清华大学 | Multiservice transmission method for physical layer component channel based on bit level |
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Application publication date: 20190920 |